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The Principle of Cooling Bed for Steel Rolling

A steel rolling cooling bed is used for the uniform air cooling of the rolled materials and transport it in a phased manner from the entry side of the cooling bed to its discharge side. It transfers the bars one by one to the roller table, on which they are transported to the finishing section. It is important equipment in the hot rolling of long products in a rolling mill. A cooling bed carefully moves and cools the hot steel rolled bars after the hot rolling process.

The rolled bars after their rolling in the rolling mill are generally above 700 deg C and are to be cooled to below 150 deg C for subsequent finishing process. The cooling beds are to provide adjustability to the size, shape, and alloy of the profiles with appropriate cooling rate and minimized distortion. This results into high quality profiles and throughput.

The principle of steel rolling cooling bed

The cooling bed is located in the rolling mill after the rolling of the steel material is completed. It supports and permits the hot rolled bars from the last stand of the mill to cool. Cooling bed cools the bars as well as cross transfers them towards the discharge end. In a cooling bed the temperature of the entire length of the bar is to be cooled at the same time. If not, it develops stresses in the bar.

After the last stand of the rolling mill, a shear arrangement is used to cut the bar which is moving to the cooling bed. This shear is normally a dual ratio crop and dividing shear. The lengths cut are to suit the length of the cooling bed and is based on the multiples of the finished saleable lengths. The cut length optimization software adjusts the primary cut lengths to the cooling bed to minimize yield losses. The tail end of the last bar can be either cobble cut at the crop and dividing shear, or if the length is greater than 3 m (metres), collected at the short bar recovery after the abrasive saws.

Cooling beds are longer than they are wide because of the bar dimensions which they are to typically cool. The length of the cooling bed is an important parameter. The length is to be such that it is able to accommodate the multiple of the saleable length. The length of the cooling bed is determined by the maximum run-out bar length, optimized by the selling lengths to minimize crop losses. The width of a cooling bed is determined on the basis of mill productivity (tons/hour) and the time required for cooling. Higher is the number of saleable length bars per cooling bed length of the bar, there is better yield of the rolling mill.

The bar delivery system to the cooling bed is to enable the bars to be transported onto the cooling bed at a speed matching with the speed of the rolling in the rolling mill. There need to have a soft braking system for the bars so that the surface of the bars remains in a perfect condition despite the high delivery speed. The system is required to adjust the braking pressure to the individual diameter and temperature of the bars. The bars are to be transferred onto the cooling bed for which the suitable arrangement needs to be provided. This ensures that only one bar is deposited per rake.

The cooling bed machine is mainly used for the online slow natural cooling of the rolled steel sheet. In the profile production line, the cold bed also has a pre-bending function for the profiles to prevent irregular bending of the profiles due to unequal quality in various places during the natural cooling process. Application areas: cooling bed machines are mainly used in the steel industry, metallurgical industry, etc.

Cooling bed for steel rolling manufacturer

There is an excellent steel rolling cooling bed manufacturer, Yushun Metallurgical Co., Ltd, which sells high-quality steel rolling cooling bed. If you want to know more about it, or are interested in our products, you can visit the website to contact us.

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The Role of The Electric Furnace Hood

Normal operation of an electric furnace produces heavy fumes in great volume which escape through the electrode ports in the roof and accumulate in the furnace shop since the volume is beyond the capacity of usual ventilating means. This produces almost intolerable working conditions in the shop, particularly during certain portions of the refining cycle.

This requires an electric furnace dust collector. According to the characteristics of fine dust and sticky dust generated by the electric furnace, in order to ensure the normal operation of the bag filter under a suitable resistance level, the electric furnace dust collector is required to have a strong cleaning ability.

The medium frequency electric furnace collecting hood is used extensively in the production of non-ferrous copper and its alloys for melting. The main components of the charge added to the induction furnace are electrolytic copper, zinc, aluminium, titanium and tin, etc. The charge usually also contains oil, dust and oxide, and the charge produces a large amount of soot during the melting of the metal, de-slagging spheroidisation and copper water discharge, and the soot can also contain oxides of zinc or tin.

Precautions for the use of electric furnace collecting hood

(1) Attention should be paid to the position of the electric furnace collecting hood installation and the direction of the exhaust. Study the mechanism of dust generation, consider the direction of dispersion, speed and critical point, and the mouth of the local dust hood of the electric furnace dust collector should be aligned with the direction of dust dispersion. If side or top cover type dust hoods are used, make it impossible for the operator to access the opening between the source of pollution and the air collection hood.

(2) The electric furnace collecting hood should be as close as possible to the source of contamination. To prevent large amounts of dust gas from escaping or large amounts of outside air from entering. As a rule, the pollution source can be enclosed in a hermetically sealed, enclosure type, etc. If this is an obstacle to operation, the dust collection hood can be mounted on the side or on top. Gases denser than air can be attracted below.

(3) Control the wind speed. The smallest wind speed required to allow harmful substances to flow into the opening of the dust collection hood from the farther point of the dispersion boundary is called the control wind speed.

(4) The form of airflow around the electric furnace collecting hood. If the airflow around the trapping point moves rapidly, it has a greater impact on the control air speed. The control air velocity will therefore decrease, so that the dust hood hood will lose its normal collecting effect.

Electric furnace collecting hood manufacturer recommendation

There is an excellent electric furnace collecting hood manufacturer, Yushun Metallurgical Co., Ltd, which sells high-quality electric furnace collecting hood. If you want to know more about it, or are interested in our products, you can visit the website to contact us.

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What Are The Benefits of Metal Sawing Machine

Introduction of metal sawing machine

Metal sawing machine is a machine tool for cutting various metal materials. The general cutting materials are various alloy steels, such as stainless steel materials, high alloy steel materials, low alloy steel materials, special alloy steel materials and so on. The use of metal band sawing machines is very wide, and there is no industry limitation, because this machine tool is a machine tool for cutting metal materials, and any industry that can use cutting needs needs metal band sawing machines. Moreover, the cutting effect of the metal band sawing machine is very good, the cutting accuracy is very high, and the workpiece can be cut in batches. It is a machine tool with great application value.

The metal saw machine is an industrial consumable used in conjunction with the band saw machine. It is widely used in metal sawing in industries such as iron and steel, machinery, metallurgy, chemical industry, electronics, national defence, aviation, aerospace manufacturing and construction and building materials.

Metal saw can be used for cold and hot steel cutting, cutting cost is low, the metal saw blade is thin, the material consumption is small, the metal saw blade toughness is good, the precision of gear box is low, not easy to explode.

Metal saw machine features

1. Metal saw can be used for cold and hot steel cutting.  Saw blades are made of different materials for cutting hot and cold materials.  When hot cutting, the temperature is generally above 750℃, and high alloy steel should be above 800℃.

2. Low cutting cost.  The saw blade is not only cheap, but also can be sharpened and reused for 7-8 times.

3. The metal saw blade is thin and the material loss is small.

4. The metal saw blade has good toughness, low precision requirements for the gear box, and is not easy to explode.

The machine can saw cut round or square material from 80mm to 350mm, motor output (kW) 90-500.

The metal saw machine belt has many mechanical advantages such as good flexibility, fatigue resistance, ability to withstand great tension and high tooth toughness, which makes it significantly superior to traditional circular saws and bow saws in terms of cutting efficiency, energy saving and environmental protection, reduction of material consumption and machining accuracy. Compared with traditional reciprocating bow saws and circular saws, it not only has the characteristics of cutting accuracy and efficiency can be increased several times, significantly reduce material and electricity losses, energy saving, high efficiency, high quality, etc., but also solved the traditional circular saws and reciprocating bow saws can not saw large cross-section workpiece problems, known as the "cutting technology revolution".

Metal sawing machine manufacturer recommendation

There is an excellent metal sawing machine manufacturer, Yushun Metallurgical Co., Ltd, which sells high-quality metal sawing machine. If you want to know more about the it, or are interested in our products, you can visit the website to contact us.

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Introduction to Flying Shear

Flying shear introduction

The Flying Shear (also known as Flying Knife) is a common industrial application for cutting a continuous product to a set length at line speed. The main production process is not interrupted thus maximizing machine productivity.

The flying shear machine is an important piece of equipment used by steel companies to shear metal billets, and its performance will directly affect the productivity of the rolling line. flying shear machine has a variety of structural forms. This chapter uses the four-link structure form, through its frame, upper and lower crank, upper and lower linkage, upper and lower rocker and workpiece of simple three-dimensional modelling. The shear force and the trajectory of the two shear blades can be derived from the assembly and simulation.

The flying shear machine is commonly used in steel rolling and paper production lines. In continuous billet rolling shops or small steel shops, it is placed at the back of the rolling line, the rolling piece will be cut into a fixed length or only cut the head and tail. In cold and hot strip shops, cross-cutting units, heavy shear units, galvanising units and tin-plating units are equipped with different types of flying shear machine, which will cut the strip to a fixed length or cut into coils of specified weight. The extensive use of flying shear machine is conducive to the rapid development of rolling steel production to high-speed, continuous direction. Therefore, it is one of the important aspects of the development of rolling steel production.

Features of flying shear machine:

1.Large shear section, large shear force

2.High shearing accuracy

3.Optimized box stability, good running stability

The flying shears must meet the following requirements to achieve good cutting quality:

Flying shear machine should ensure good shear quality - accurate sizing, neat cutting surface and a wide range of sizing adjustment, but also a certain shear speed.

1. the horizontal speed of the shear blade should be equal to or slightly greater than the speed of movement of the rolled part.

2. the two shearing edges should have an optimum shearing edge clearance.

3. during shearing, the shearing edge should preferably move in a translational motion, i.e. with the shearing edge perpendicular to the surface of the rolled part.

4. flying shear machine to work according to a certain working system to ensure the fixed length.

5. the acceleration and mass of the moving parts of the flying shear machine should be kept to a minimum in order to reduce inertia forces and dynamic loads.

Flying shears manufacturer recommendation

There is an excellent flying shear manufacturer, Yushun Metallurgical Co., Ltd., which sells high-quality flying shear. If you want to know more about the it, or are interested in our products, you can visit the website of Yushun Metallurgy Co., Ltd.

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Learn about Continuous Casting Machine

Continuous casting machine overview

Continuous casting is a process in which high temperature molten steel is continuously cast into a slab with a certain section shape and a certain size.The equipment needed to complete this process is called continuous casting equipment. The electromechanical and hydraulic integration of pouring equipment, continuous casting machine body equipment, cutting area equipment, inducer bar collecting and conveying equipment constitutes the core part of continuous casting equipment, which is traditionally called continuous casting machine.

Continuous casting machine composition

Continuous casting machine is a production process that directly casts molten steel into billets with a certain cross-sectional shape and specification.The continuous casting machine is mainly composed of a tundish, a mold, a pinch roll, a tension leveler, and a leveling roll. The tundish mainly stores a part of molten steel to ensure continuous casting of steel, reduce the impact force generated during crystallization after molten steel injection, stabilize the steel flow and shunting, and separate slag and non-metallic inclusions under the molten steel belt. The mold is a bottomless water-cooling device, which forces the ingot to cool rapidly and specifies the shape of the slab. The pinch rollers mainly prevent the billet from bulging due to the effect of the internal steel hydrostatic pressure, and play a guiding role in the movement of the billet. The tension leveler is to pull the billet forward. The straightening rollers are mainly used to straighten the surface of the slab.

Continuous casting machine further simplifies the production process, and can directly obtain a slab with a certain cross-sectional shape, eliminating the need for full-molding ingot casting, demoulding, soaking, and blooming. It can save metal and has a high yield. It can save energy, improve labor conditions, improve production efficiency, good quality and low production cost.

Continuous casting machine advantages

According to the principle and advantage of continuous casting industry manufacturing, during the whole manufacturing process, the molten liquid metal is rapidly cooled by the crystallizer and the secondary cooling equipment to form the steel with compact and uniform microstructure, which improves the mechanical properties from the microstructure.It is difficult to ensure the uniform structure of the upper and lower parts of the casting in ordinary die casting.

It is not necessary to cut off the head and tail when rolling like ordinary cast steel, which can save metal and even increase the yield of steel production to more than 99%.

The principle of continuous casting determines that this kind of manufacturing process is simpler, which eliminates the molding and other molding preparation processes, reduces the land area occupied by the production and reduces the labor intensity.

It is easy to implement mechanization and automation production mode in continuous casting production. Large-scale continuous casting production ensures the balance and stability of product quality, and directly connects continuous rolling production seamlessly to the end of the continuous casting production line to form a continuous casting and rolling production line.Continuous casting and rolling make steel production faster and more efficient.

As a continuous casting machine manufacturer and supplier, Yushun metallurgical has extensive experience in producing high-quality continuous casting machines.Our company may design and produce complete equipment of 100*100-150*150 billets stand casting machine, twin casting machine and multiple casting machine with automatic control system. Moreover, we'll provide necessary device and facilities such as straightening machine, vibrating mechanism, auto-cutter, billet cooling bank, billet spreader, molten steel spreader, soft water treatment and water cooling system etc.

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Analysis of the Running Process of Wire Rod Mill-laying Head

Wire rod mill-laying head overview

Wire rod mill-laying head generally refers to a wire rod mill with a maximum rolling speed higher than 40m/s, which is a comprehensive product of metallurgical technology, electronic control technology and mechanical manufacturing technology. In a high-speed wire rod production line, after the wire rod is rolled, it needs to be laid into a loop through a laying machine to complete the transformation from a straight wire rod to a coil. The Wire rod mill-laying head is one of the key equipment for the production of high-speed wire rods, and it is also an important bottleneck restricting the further speed-up of the high-speed rolling mill. The quality of laying wire directly affects the physical quality of the high-speed wire rod. With its special shape structure and a certain speed, the Wire rod mill-laying head turns the straight current wire rod moving at high speed into a coil with stable coil shape and uniform spacing. With the increase of wire rolling speed and output, the requirements for Wire rod mill-laying head are also getting higher and higher. Therefore, many high-speed wire rod manufacturers will experience unstable laying circles during production, which will affect product quality and production. .

Wire rod mill-laying head principle

The Wire rod mill-laying head is a horizontal structure, which is located between the water-cooled box and the cold-controlled roller table that controls the cooling line after the finishing mill. The Wire rod mill-laying head consists of a transmission device, a hollow shaft, a laying disc, a laying tube, a bevel gear and other components. The laying head is driven by a motor, and the hollow shaft is driven to rotate through the meshing of a pair of bevel gears in the gearbox. The laying tube is installed on the laying disc, and the laying disc and the hollow shaft are connected by bolts.

When the Wire rod mill-laying head is working, it is fed into the hollow shaft of the laying machine from the inlet conduit of the laying machine through the pinch roller in front of the laying machine. The wire is spit out the coil along the tangential direction of the circumference of the spinning tube outlet through the rotating laying tube, and is smoothly poured on the air-cooled roller table to form a continuous coil. When the wire rod passes through the high-speed rotating laying tube, under the action of the positive pressure of the laying tube wall, the sliding friction force, the thrust of the finishing mill and the pinch roll, and its own centrifugal force, it gradually bends and deforms with the shape of the laying tube. , there is a linear motion to gradually bend, and the required curvature is achieved at the exit of the spinning tube to form a spiral coil, which is evenly and smoothly spit out in a circle.

High-speed wire rod production has higher requirements on the shape of spinning circle, and the quality of spinning directly affects the rhythm of production. The spinning process of the spinning machine is relatively complicated. When the spinning condition is not good, it is necessary to carefully observe the displayed situation, carefully check, detect and carefully record the adjustment. Through the understanding of the spinning process, find out the reason and processed in a timely manner.

Wire rod mill-laying head supplier recommendations

There is an excellent Wire rod mill-laying head manufacturer, Yushun Metallurgical Co., Ltd., which sells high-quality Wire rod mill-laying head. If you want to know more about the Wire rod mill-laying head, or are interested in our products, you can visit the website of Yushun Metallurgy Co., Ltd.

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Truly Fully Automatic Steel Packing Machine

Introduction of automatic steel packing machine

Here is an industrial-specific automatic steel packing machine, which is different from the hand-held battery-type steel bar baler. It is a truly industrialized and fully automatic steel packing machine.Automatic steel packing machine, also known as strapping machine, is to use strapping straps to bundle products or packages, then tighten and combine the two ends by hot-melt bonding,mainly used for non-ferrous metal, steel enterprises bundle various specifications of pipe, profile, ingot, plate and other products.The function of the automatic steel packing machine is to reinforce the packaged items, so that the items will not be scattered due to poor binding during the handling process and storage, and at the same time, the packing should be neat and beautiful.

Automatic steel packing machine performance index:

Bundling diameter range:Φ100~Φ400

Bundle bale weight:1500KG-4000KG

Bundle bale shape:round

Suitable steel specification:deformed steel bar, (Φ10~140)round bar

Bundling object temperature:≤300℃

Bundling wire material and specification:Q195,specification is Φ5.5~7(recommend Φ6.5)green rod

Bundling type:single wrap, single knot

Knot angle:630°

Single track bundling time:7~12 seconds

Working temperature:-10℃-40℃

Control mode:manual and automatic with the function of interlocking communication with the production line

Installation weight:～4tons

Power supply:three-phase four-wire AC380V+PE 50HZ

Installed gross capacity:16KW

Contour size of the unit:3600x1250x2050

Automatic steel packing machine feature:

Lift cover type panel, easy maintenance.

New electric heating device, fast heating, long service life.

Single chip electronic control, complete functions, easy operation.

Four bundling methods to ensure a wide range of customer bundling requirements.

Low cost of packing string.

The fully automatic steel packing machine meets the bundling needs of various products in the factory and greatly improves the efficiency of industrial production.Automatic steel packing machine Manual bundling and cutting the belt is done at one time. Easy to service, easy to access and only a few parts to change. Damaged parts can be replaced by customers themselves. With ergonomic design, the body is well balanced, and the bandwidth and cutter can be adjusted arbitrarily.

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Cold Charging Low Nitrogen Combustion Walking Beam Heating Furnace

Cold Charging Low Nitrogen Combustion Walking Beam Heating Furnace

The walking beam heating furnace is a continuous heating furnace that moves the blank step by step by the upward, forward, downward, and backward movements of the furnace bottom or the water-cooled metal beam.

The walking beam heating furnace is also a continuous heating furnace. It relies on a special stepping device to move according to a certain trajectory to make the steel material in the furnace advance step by step, so it is called a walking beam heating furnace.

The walking beam heating furnace can heat the blank on both sides. Compared with the push-steel furnace, its advantages are: flexible material transportation, all the charge can be discharged out of the furnace if necessary; billets are placed at intervals on the furnace bottom or beam, which can be heated evenly faster. Arching and sticking failures of push-steel furnaces are completely eliminated, so furnace length is not limited by these factors.

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1000KW Rolling Mill Reheating Furnace , Steel Billet Induction Heating Furnace

The purpose of heating in the reheating furnace of rolling mill is to heat the billet to a uniform temperature suitable for rolling (austenite structure). After the temperature is increased, the plasticity of the steel is first increased, the deformation resistance is reduced, and the steel is easily deformed. For example, the deformation resistance of T12 steel at room temperature is about 600Mpa, and when heated to 1200°C, the deformation resistance drops to about 30Mpa, which is only one-twentieth of the deformation resistance at room temperature. Steel with a suitable heating temperature can be rolled with a larger reduction, which can reduce equipment accidents caused by wear and impact, improve the productivity and operation rate of the rolling mill, and reduce rolling energy consumption. Secondly, heating can improve the internal structure and properties of the billet. The inhomogeneous structure and non-metallic inclusions are homogenized by the diffusion effect of high temperature heating. Heating temperature and uniformity are indicators of heating quality. When steel with good quality is heated, it is easy to obtain finished products with correct cross-sectional shape and accurate geometric dimensions.

1. Many rolling mill have many cold billets need to reheat.some hot billets goes out from casting machine,because of long rolling table,the temperature of hot billets fall down to 600C-800,need reheat billets to 1250C to go to rolling machine.

2. Induction reheating furnace can special design for rolling mill.Can design furnace type according to customer’s roll table direction.Induction reheat furnace can use for reheat billets ,or heat cold billets to 1250C

3. Induction reheating furnace are customized under customer's workshop size.and customer's special requirement.

4. Furnace can also heat all kinds of iron/steel/aluminum bars,boards,pipes.etc

5. Heating speed fast,can stop production at any time.This advantage is much better than gas furnace.

6. Easy operation and maintenance. Environmental protection.

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We are a professional supplier of Short Stress Rolling Mill, we have been committed to providing our customers with high quality products, if you are interested in this, please contact Yushun Metallurgical Technology Co.

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We are a professional metal saw manufacturer, if you are interested in this, please pay attention to Yushun Metallurgical Technology Co.

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The Working Principle And Characteristics Of The Band Saw Machine

How to use band saw blade

 Saw blade in the equipment is vital, the main sawing are relying on the saw blade to saw, saw blade to buy a price is also very expensive, so for us to use the correct saw blade, to reduce the depletion of the saw blade:.

 1. Saw teeth teeth saw: the correct choice of saw teeth pitch and feed rate and sawing speed is as important as the choice. Saw teeth too dense easily caused by band saw blade fracture, saw marks bending and saw teeth wear too fast. Saw teeth are too dense between the gap is full, the saw teeth are prone to fracture.

 2. Saw tooth shape: each tooth shape design has the ideal application, tooth shape is too weak to cause saw tooth breakage, tooth shape selection error saw tooth wear too fast.

 3. Sharpening: each band saw blade should be sharpened to get the maximum service life. Improper band saw grinding, it will cause the saw teeth wear too fast, vibration force, easy to cause the product surface roughness.

 4. Band saw life: all band saw blades will be scrapped by wear and tear, pay attention to the signs of wear. Saw teeth have worn easy to cause saw marks bending and band saw blade slipping, while the product surface roughness.

 The working principle of band saw machine

 Hydraulic transmission system consists of pumps, valves, cylinders, tanks, pipelines and other components of the hydraulic circuit, under the electrical control to complete the lifting of the saw beam, the workpiece clamping. Through the speed control valve can implement the stepless speed adjustment of the feed speed, to achieve the sawing needs of different materials workpiece. Electrical control system consists of electrical box, control box, junction box, travel switch, electromagnet and other control circuits, used to control the saw blade rotation, saw beam lifting, workpiece clamping, etc., so that it can realize the normal cutting cycle according to certain working procedures.  

Lubrication system before starting must be according to the machine tool lubrication parts (wire brush shaft, worm gear box, active bearing seat, worm bearings, lifting cylinder up and down the shaft, movable vise sliding surface clamping screw) requirements oil. Worm wheel box in the worm wheel, worm using No. 30 oil bath lubrication, by the worm wheel box upper oil plug hole injection, box Xian surface with oil marker, when the saw beam is located in the lowest position, the oil surface should be located between the upper and lower limits of the oil marker. Oil should be changed after one month of trial use, after every 3-6 months for oil change 1 time, the lower part of the worm gear box with oil release plug. Saw transmission installed in the worm gear box motor through the pulley, triangle tape drive the worm and worm gear in the worm gear box, drive the active wheel rotation, and then drive the saw blade around the active passive wheel edge for cutting rotary motion. The saw blade feed motion is controlled by the hydraulic circulation system consisting of lifting cylinder and speed control valve, which controls the descending speed of the saw beam and thus controls the saw blade feed (stepless speed control) motion. The saw brush rotates where the saw blade comes out of the chip and rotates in the direction of the saw blade and is cleaned by the coolant pump supplying coolant to remove the chips from the saw teeth. The coolant is in the cooling cutting fluid tank on the right side of the base and is supplied by the pump directly driven by the coolant.  

 Press the tight stop (stop) button, rotate clockwise, the oil pump motor works, the gear pump works, the oil enters the pipeline through the screen, adjust the overflow valve to make the system work pressure up to the requirements. The opposite button is pressed inward, all motors stop working. Workpiece clamping press the clamp button, solenoid valve work, hydraulic oil into the left side of the clamp cylinder, the right side of the hydraulic oil back to the tank, the left clamp to the workpiece clamping. Saw beam down according to the work press the pliers, hydraulic oil through the solenoid valve into the lifting cylinder rod cavity; rodless cavity hydraulic oil through the solenoid valve, one-way speed control valve back to the oil tank. The saw beam is descending according to the down button, hydraulic pressure through the solenoid valve work, oil into the lifting cylinder rod cavity, rodless cavity oil through the solenoid valve back to the oil tank. Saw beam up press up button, hydraulic oil through the solenoid valve into the lift cylinder rodless cavity; rodless cavity oil through the solenoid valve back to the tank. Workpiece loosening press the clamp loose button, hydraulic oil through the solenoid valve into the right side of the clamping cylinder; left hydraulic oil can be returned to the tank through the solenoid valve, the left jaw to the left movement of the workpiece loosened.

The system's analog input and output module, so that the sawing process monitoring has a wide range of significance, such as: sawing machine as long as the increase of saw blade deformation feedback, you can make adaptive adjustments to the sawing speed. The speed and position control of the sawing process can be optimized by adding servo valves. The management function of the system makes the management of materials and workpieces more convenient. The system's Chinese interface and real-time graphic status display make the operation more friendly and intuitive. As the system uses standard PC, it makes the networked management of sawing more convenient.

 Main features of metal band sawing machine

 1. The speed of the sawing band on the machine can be adjusted without limitation.

 2. Use of hard chrome plated cylinders to adjust the rise and fall of the band saw machine saw frame.

3. Digital setting of sawing parameters, PLC programmable controller, flexible setting, changing sawing mode, very flexible human-machine interface.

 4. Within the specified range, the feed of the sawing machine can be adjusted for speed.

 5. After the machine set parameters, through mechanical, electrical, hydraulic, with automatic clamping, automatic knife, cutting finished automatically and quickly rise (i.e., back knife), automatic feeding function, no manual operation.

 6. Feeding positioning error ±0.2mm, positioning is very accurate.

 We are a professional metal saw manufacturer, if you are interested in this, please pay attention to Yushun Metallurgical Technology Co.

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Advantages Of Short Stress Mills-Yushun Metallurgical Technology

Advantages of short-stress rolling mills

 1.The high stiffness of the mill ensures high accuracy of the product, and it is easy to achieve negative deviation rolling.

 2. The ability to achieve symmetrical adjustment. This is important to stabilize the operation, improve the operating rate, save time for maintenance and replacement of guide beam, reduce operating accidents, avoid process accidents such as bending of the rolled part, impact, winding rolls, and improve the life of the guide.

 3. As the mill changes the force transfer path, the concentrated load of the pressed-down screw is changed to a decentralized load dispersed on both sides of the bearing seat, so that the bearing and bearing seat better stress, bearing life than ordinary mills to improve more than 1.5 times, thereby reducing the cost of products.

 4. Short stress mill roll system in the change of rolls before the pre-installation and adjustment, after parking about 10min can be replaced with a new roll system. The new roll system can be adjusted after rolling one or two steel to ensure that the product qualified. Therefore, this mill has good pre-adjustment performance, fast roll change and high yield rate.

 Short stress mill, also known as no plate mill, is a high stiffness mill, when used as a steel mill, it should not only have a high radial stiffness, but also should have a high axial stiffness. At present, China has developed a variety of types of short stress line mill such as: GY type, HB type, CW type, SY type, GW type, DW type, etc., of which there are three representative, they are GY type short stress line mill, HB type without a plate mill, SY type high stiffness mill. These mills are referred to Sweden's P-60. type no-plate mill, combined with their own different circumstances developed, so they are similar to the main stress part of the Quai stress line structure, only in the support mode and some specific structure is a little different, each with its own characteristics.

 We are a professional supplier of Short Stress Rolling Mill, we have been committed to providing our customers with high quality products, if you are interested in this, please contact Yushun Metallurgical Technology Co.

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Features And Lifting Devices Of Bar And Wire Rod Rolling Mills

Characteristics of rod and wire rod rolling mills

 At present, the number of horizontal small rod and wire rod mills in China is still very small, and the number of semi-continuous small mills is also very small, but most of them are continuous small mills. The characteristics of such mills are

 1.Low production cost with continuous casting slab as raw material.

 2.Continuous casting heating furnace is compact, hot continuous casting billet supply, energy saving up to 30-45%.

 3.Step-by-step heating furnace heating, uniform heating, high degree of automation.

 4.High pressure water removal device is installed at the back of the furnace to improve the surface quality.

 5.18 rows of horizontal and vertical rolling lines, the whole line adopts twist-free rolling, with less production accidents and high efficiency.

 6.The rolling mill adopts short stress line rolling mill. High rigidity of the mill, easy operation of adjusting the roll symmetry, replacing the entire stand, adjusting the roll hole type and guidance between the rolls, with less online adjustment.

 7.The main drive of the mill uses DC or AC speed regulation to achieve stepless speed regulation of the mill speed.

 8.Produce steel bars by slit rolling.

 9.Adopt step type cooling bed, high cooling efficiency and good cooling quality.

 Vertical rolling mill lifting device

 The foundation equipment of the bar rod mill is made of welded steel structural components. It is fixed to the foundation by means of foundation bolts. The base of the mill can slide on it. Four locking devices are arranged in front and behind the base to fix the main body of the mill to the base. Horizontal mill traverse device (vertical mill lifting device) is fixed on the base, horizontal mills are usually traversed by hydraulic cylinders. Vertical mill lifting device usually has two forms.

 1.Hydraulic cylinders for lifting. This method is simple in structure and the same horizontal moving device as the horizontal mill. However, the hydraulic system should consider balancing and locking system to prevent the mill from becoming heavy when the system fails.

 2.Lift with screw jack, left and right a screw jack lifter, the middle shaft connected in series, driven by gear motors or hydraulic motors, lifting screws with self-locking properties, ensuring that the mechanical safety department relies on it and replaced the slot. The position is accurate.

 We are a professional manufacturer of steel rolling equipment, providing short stress rolling mill and other related rolling equipment, if you are interested in this, please contact Yushun Metallurgical Technology Co.

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Short-Stress Rolling Mill Working Mode And Rolling Process

Short stress rolling mill working method

 The mill is subjected to rolling forces through the rolls, roll bearings, boxes, copper nuts, tie rods and other stressed parts of the internal stress line into a closed loop, that is, the stress line. The mill base and press down mechanism is not subject to rolling force, the stress line is shorter than the ordinary mill, which improves the strength of the mill and reduces the elastic deformation of the mill, so called the "short stress line mill".

 Short stress rolling mill rolling process

 In order for you to better grasp the short stress rolling mill rolling process, we a single stand twenty-roller cold rolling mill for example, its rolling rolling process can be divided into on and through the strip, reversible rolling; unloading and re-rolling 3 stages. The equipment is rolled with large tension; the rolling process starts after the tension is applied to the coil/uncoiler before and after the mill.

 The work before this is known as the short stress mill on and through the strip stage, generally with the loading trolley will be sent to the uncoiler reel; uncoiling most of the floating uncoiler to ensure that the strip is always in the central position of the mill; uncoiling after the strip by straightening machine for straightening. However, there are also some mills with hydraulic shears can be cut head, steel belt with a swinging guide table across the machine before the winding machine, directly to the twenty-roller cold rolling mill, and then the uncoiler continues to send forward the steel belt through the mill has been sent to the machine after the winding machine jaws, jaws clamped steel belt head and winding on the reel 2-3 turns after the end of the belt feed, through the end.

 After the end of the short stress mill wear, first placed on the upper and lower work rolls, and then align the rolling line, close the mill closed door, press down the press plate before the machine, the exit side wipers press the strip, the mill process lubrication and cooling system to start the liquid supply, the mill strip press down, the winder rotation to the strip before tension, the machine before and after the thickness gauge, speed gauge into the rolling line, the unit running to start the first pass of rolling.

 We are a professional manufacturer of short stress rolling mill, providing short stress rolling mill and other related rolling equipment, if you are interested in this, please contact Yushun Metallurgical Technology Co.

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Some Requirements For The Lubrication Of The Steel Rolling Mill

Rolling mill requirements for lubrication

 1. Steel rolling mill

 Steel rolling mill components mainly include rolling mill base, universal joint and balance device, gear base, main coupling, reducer, motor coupling and motor.

 2. Lubrication of the rolling mill

 (1) Dry oil lubrication, such as tropical steel rolling mill in the furnace infeed roller, pushing steel machine, discharge machine, vertical roll, seat, mill roller, mill work roll, mill press down device, universal joint shaft and support, head cutter live sleeve, guide plate, output roller, turning machine, winding machine, cleaning machine, turning ingot machine, shear, disc shear, crushing edge machine and palletizer, etc. are dry oil lubrication.

 (2) Thin oil cycle lubrication, uncoiler, five racks, feeding rollers, rolling shears, guide rollers, steering rollers, winders, gear shafts, levelers and other equipment lubrication, as well as each rack of oil film bearing system lubrication are used in thin oil cycle lubrication.

 (3) High-speed, high-precision rolling mill bearings with oil mist lubrication and oil and gas lubrication.

 3. Rolling mill process lubrication and cooling of common media

 In the rolling process, in order to reduce the friction between the roll and the rolling material, reduce rolling force and power consumption, so that the rolling material is easy to extend, control the rolling temperature, improve rolling product quality, must be added to the roll and rolling material between the contact surface process lubrication cooling media.

 The basic requirements of the rolling mill lubrication and cooling medium

 1. The appropriate oil.

 2. Good cooling capacity.

 3. Good oxidation stability, rust resistance and physical and chemical stability.

 4. Good filtration performance.

 5. Good flushing and cleaning effect on the surface of rolls and products.

 6. Good annealing performance for cold rolled strip steel.

 7. No damage to human health.

 8. Easy to obtain oil source, low cost.

 Rolling mill process lubrication and cooling media variety, different rolling materials need to use different lubrication and cooling media, such as rolling aluminum strip, aluminum foil with additive kerosene as a lubrication and cooling media.

 We are a professional supplier of steel rolling equipment, has been committed to providing customers with quality products, if you are interested in this, please contact Yushun Metallurgical Technology Co.

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Introduction Of Several Classifications And Functions Of Bar Mills

Introduction of several classifications and functions of bar mills

 For a long time, China's bar and wire rod production accounted for 40%-50% of the total output of steel products has been in between, in recent years, the sum of bar and wire rod production of more than 400 million tons, in addition to about 10% of exports, the rest of the production is used for domestic digestion, it can be seen that bar and wire rod products play a fairly important role in the construction of the national economy. Bar and wire rod mills are large and widespread, with more than 1,000 production lines nationwide. Since the 20th century, 80s and 90s, China has introduced foreign advanced bar and wire rod mill, through digestion - transformation - upgrade this technical route, so that China's domestic bar and wire rod mill equipment close to the world's advanced level, plus 12% of imported international advanced level of production lines, at present, in the domestic advanced level above This part of the proportion of about 75%, becoming the mainstream of the market. Another 20% of ordinary rolling mills, using a two-line twist rolling process, the output is large, only suitable for the production of ordinary carbon steel. There are still 5% of backward mills to be eliminated.

 After more than 30 years of development, at present, the bar mill types are summarized in three categories, namely, closed two-roller mill, short stress line mill, cantilever roll ring mill. The closed-end two-roller mills are mainly Morgan type and Simak type (including Demark type), Morgan type closed-end mills through the introduction, digestion, has been successfully applied to hundreds of domestic production lines. Short stress line mills are introduced mainly Danieli type and Permini type, China's major research institutes have developed their own brand of short stress line mills, hundreds of domestic bar and wire rod production lines have been applied. Cantilever roll ring mill only Danieli development, China's introduction of not many, such as Lai Steel, Tang Steel, etc., only for roughing units.

 Bar reduction mill is installed after the bar finishing unit, used to improve product size accuracy, improve product performance (by controlling the temperature rolling), mainly for special steel bars. Reduced diameter mill differs from ordinary mills in three main ways.

 First, the use of clutch with speed ratio, so that it can adapt to the different rolling speed needs of all products.

 Second, the use of minimum mill center distance to reduce the dimensional impact of micro-tensile rolling.

 The third is the use of a single hole type carbide roll ring with double support rolls to ensure sufficient stiffness to accommodate a wide range of product specifications. At present, the introduction of domestic models include two types: a two-roller mill; a three-roller Y-roller. Two-roller mill is mainly Permini type and Danieli type, with three stands flat - vertical - flat arrangement and four stands flat - vertical - flat - vertical arrangement of two types, the mill roll system using a high stiffness of the short stress line mill frame structure. Three-roller Y mill is mainly KOCKS type and Simak type, usually consisting of 3-5 stands, the roll hole pattern is Y-Δ alternating arrangement.

 The mainstream domestic model of wire rod finishing mill is Morgan V 10-stand top cross 45° heavy-duty unit with a maximum operating speed of 90m/s, which can basically meet most of the wire rod production needs. At the same time, we have introduced some Morgan VI 8 4 models, Simak reduction units and Danieli double module units, with advanced 20° tilting angle spitting machine, the maximum operating speed of 120m/s. The outstanding advantage of VI models is that they can realize low temperature finishing, precision rolling, single hole type rolling, suitable for the production of special steel wire rod.

 Due to the large investment in the size-reducing unit and the need for sufficient distance between the finishing mill and the wire spitting machine to achieve temperature-controlled rolling, this poses a major challenge to the old mill renovation. A new type of double-stand wire rod MINI rolling mill was successfully developed by Harbin Aircraft Manufacturing Co. This MINI mill is installed between the existing 10-stand finishing mill and spit mill, which can increase the speed of Φ5.5mm wire rod from the original 90m/s to 105m/s, and can improve the output of small-size wire rod, and also realize partial temperature-controlled rolling. This kind of rolling mill has low investment and is very suitable for old line renovation.

 We are a professional steel rolling equipment supplier and have been committed to providing customers with high quality products, if you are interested in this, please pay attention to Yushun Metallurgical Technology Co.