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Examples of types of shears
parallel bladeshearing machine
Parallel blade shears have two cutting edges parallel to each other. It is usually used for horizontal cutting of square and rectangular blanks under high temperature conditions. It can also be used for cold shearing of profiles, forming the cutting edge of the blade to shear and roll non-rectangular profiles.
According to the motion characteristics of the shearing mechanism, the parallel blade shearing machine can be divided into two types: upper shearing type and lower shearing type.
The lower cutting edge of the upper cutting machine is fixed; the cutting is caused by the up and down movement of the upper cutting edge. The shearing mechanism usually adopts the crank connecting rod mechanism.
The two cutting edges of the cutting machine are moving, and the cutting process is realized by the rise of the lower cutting edge. The shearing mechanism generally has two kinds of eccentric shaft type and floating type.
The large shear force that the parallel blade shear machine can withstand when it works is its main parameter, so people are used to naming it with large shear force.
oblique bladeshearing machine
A bevel shearer puts one cutting edge at an angle to another. According to the motion characteristics of the shearing mechanism, the inclined blade shearing machine can also be divided into upper cutting type, lower cutting type and composite type.
top shear oblique blade scissors
The lower shearing edge of the plate shearing machine is straight and fixed, and the upper shearing edge is inclined to move up and down to realize shearing. The upper oblique shearing edge is usually cut as a separate device to cut the width of the plate. When the thickness of the plate is greater than 20mm, the transverse plate can be used on the continuous production line, but there must be an oscillating roller. On the other hand, when the thickness of the plate is greater than 25mm, the disc shear cannot be used, and the oblique shearing edge shearing is set on both sides of the continuous production line.
Bottom-cutting beveled scissors
shearing machineThe upper cutting edge is fixed, and the lower cutting edge moves up and down for cutting. Since the lower shear blade moves upward for shearing, there is no need to set a swing platform. Generally used for continuous operation of strip steel crosscutting. The cutting edge of this type of shearing machine is usually inclined on the upper edge and horizontal on the lower edge. However, in recent years, the upper cutting edge is horizontal and the lower cutting edge is inclined. Production experience has proved that this type can ensure the perpendicularity of the shear surface relative to the center line and surface of the strip. The disadvantage is that the structure is complex, because the pressure plate must be placed below.
compound shearing machine
At the end of the continuous line, there is a composite inclined blade shearing machine to divide the original welded long strip into coils of a certain weight. This kind of scissors has a fixed double-edged tool holder in the middle, and the upper and lower parts have movable tool holders, also called upper and lower double-edged scissors. When the strip steel passes through the upper part of the fixed double-blade tool holder, the strip steel is removed by the L-shaped coiler. When separation is required, the upper movable tool holder descends to cut the strip, and the latter strip is taken up by another coiler through the lower part of the fixed double-edged tool holder.
disc shear
The upper and lower cutting edges of the shearing machine are disc-shaped. When cutting, the disc knife makes a circular motion at the same speed as the roll, forming a pair of endless scissors. Disc shears are usually set on the shear line of the sheet or strip and shear the moving sheet or strip in the longitudinal direction.
crocodile shearing machine
Crocodileshearing machineIt is suitable for metal recycling companies, scrap mills, smelting and casting enterprises to cold shear various shapes of steel and metal structures to process qualified charges. There are 8 grades of shear force from 63 tons to 400 tons.
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