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What is a shearing machine?
2021-05-24 00:07:39

What is a shearing machine

Shearing machine is a kind of machine tool, which adopts hydraulic drive, reliable safety performance and convenient operation. The working blade length of the shearing machine: 400mm, 600mm, 700mm, 800mm, 1000mm, 1200mm; eight levels of shearing force from 63 tons to 400 tons, suitable for users of different scales and different requirements. No foot screws are required for installation, and diesel engines can be used as power in places where there is no power supply. The shearing machine is suitable for metal recycling processing plants, scrap car dismantling plants, smelting and casting industries, cold shearing, pressing and flanging of various shapes of steel and various metal materials, as well as powdered products, plastics, glass fiber reinforced plastics, and insulation Material and rubber compression molding. Shears are divided into different types: metal shears, combined punching shears, hydraulic shears, bar shears. The most commonly used metal shears are alligator shears and gantry shears.

Shearing machine is a kind of mechanical equipment used to cut metal materials. In the rolling production process, after rolling large-section steel ingots and billets, the section becomes smaller and the length increases. In order to meet the requirements of subsequent processes and product size specifications, various steel production processes must have a shearing process.


The purpose of the shearing machine is to cut to length, cut the head, cut the tail, trim the edge, cut the sample and cut off the local defects of the rolled piece, etc. Shearing machine is one of the important auxiliary equipment in steel rolling machinery, because the capacity of the shearing machine directly affects whether the production capacity of the rolling mill can be fully utilized and the balance of the metal process of the rolling production line.

Shearing machines are also widely used in machinery manufacturing and repair departments.

Types of:

Parallel Blade Shearing Machine

The two cutting edges of the parallel blade shearing machine are parallel to each other, and it is usually used to cut square and rectangular section steel billets transversely under hot conditions. It can also be used for cold-cutting profiles, and the blade is made into a shaped cutting edge to cut non-rectangular cross-sections.

Parallel blade shears are divided into two types: up-cutting and down-cutting according to the movement characteristics of the shearing mechanism.

The lower cutting edge of the upper cutting shear is fixed; the cutting is performed by the up and down movement of the upper cutting edge. The shearing mechanism usually adopts: crank connecting rod mechanism.

Both cutting blades of the down-cutting shearing machine move, and the shearing process is achieved by rising the lower cutting blade. The shearing mechanism usually has an eccentric shaft type and a floating type.

Parallel blade shears, the maximum shearing force it can withstand when working is its main parameter, so people are used to name it after the maximum shearing force. 

Oblique Blade Shearing Machine

One cutting edge of the oblique cutting machine is placed at an angle relative to the other cutting edge. The oblique blade shearing machine can also be divided into up-cutting type, down-cutting type and compound type according to the movement characteristics of the shearing mechanism.

Up-cut oblique blade shears

The lower cutting edge of this shearing machine is straight and fixed, and the upper cutting edge is inclined and moves up and down to achieve cutting. The up-cut oblique-blade shear is usually used as a separate device to cut wide plates. When the thickness of the plate is greater than 20 mm, it can be used to cut the plate on a continuous line, but it must have a swing roller table. When the disc cannot be used to cut the edges larger than 25mm, the upper-cutting oblique-blade shears shall be set on both sides of the continuous working line to trim the edges.

Undercut oblique blade shears

The upper cutting edge of this shearing machine is fixed, and the lower cutting edge moves up and down to cut. Because it uses the lower shearing blade to move upwards for shearing, there is no need to set a swinging roller table, and it is generally used for cross-cutting strips on a continuous working line. The cutting edge of this type of shearing machine usually has an inclined upper cutting edge and a horizontal lower cutting edge. But recently, the upper cutting edge is horizontal, and the lower cutting edge is more and more inclined. Production experience has proved that this type can ensure the verticality of the cutting surface relative to the strip centerline and surface. The disadvantage is that the structure is complicated due to the pressure plate being placed underneath.

Compound oblique blade shears

At the end of the continuous line, in order to divide the originally welded long strips into coils of a certain weight, a compound oblique blade shearing machine is installed. This type of shear has a fixed double-edged knife holder in the middle and a movable knife holder at the top and bottom, which is also called the upper and lower double-layer oblique-blade shears. When the strip passes through the upper part of the fixed double-edged knife holder, the strip is taken up by the No. 1 coiler. When it is necessary to separate the coils, the upper movable blade holder is lowered to cut the strips, and the following strips pass through the lower part of the fixed double-edged blade holder and are wound by another coiler.

Disc shear

The upper and lower cutting edges of this shearing machine are disc-shaped. When cutting, the disc knife makes a circular motion at a speed equal to that of the rolling piece, forming a pair of scissors with no ends. The disc cutter is usually set on the cutting line of the plate or strip, and is used to cut the moving plate or strip longitudinally.

Crocodile shear

The crocodile shearing machine is suitable for metal recycling companies, scrap steel plants, smelting and foundry companies to perform cold shearing of various shapes of steel and various metal structures to process qualified charge. The mechanical shearing machine is hydraulically driven and easy to operate. , Simple maintenance. There are 8 grades of shear force from 63 tons to 400 tons.

Gantry Shear

It is mainly suitable for the cutting of metal plates such as steel plates, copper plates and nickel plates. Shearing force is 100 tons to 250 tons. The size of the material to be cut (12~20mm)*250mm. The cutting frequency is 8-12 times per minute. This series requires simple infrastructure. Gantry shears are driven by hydraulic pressure. Compared with mechanical transmission shears, they have the characteristics of small size, light weight, low movement inertia, low noise, smooth movement, flexible operation and large cutting section. Hydraulic and electric integrated control, can implement single, continuous action conversion, simple and convenient to use, can stop and run at any working position, easy to achieve overload protection. It has a wide range of applications. It can be used as processing equipment for metal recycling and processing units, as well as furnace charge processing in factory foundries and metal cutting processing equipment in the mechanical construction industry.

Related tags: Crocodile shear Gantry Shear

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