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Common Problems of Steel Plate Bending


Cracking

Bending cracking refers to the phenomenon that burrs or fine cracks often appear on the edge of the material after cutting, shearing or punching, and stress concentration is easily formed and cracked when bending.

The main causes of bending cracking are: ①The burrs on the edge of the part are not cleaned up. ②The bending direction is parallel to the rolling direction of the plate. ③The bending radius of the plate is too small.

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Indentation

Bending indentation is the phenomenon that friction is generated during the gradual close contact between the plate and the inner surface of the V-shaped groove of the die, resulting in obvious marks on the surface of the plate.

In addition to improving the hardness of the material and the structure of the lower die, the method of anti-indentation rubber pads and ball-type bending lower dies can also be used to solve the bending indentation problem.

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Bending rebound

When the work piece leaves the bending die, elastic recovery occurs, making the shape and size of the bent part inconsistent with that when loaded. This phenomenon is called bending rebound. Bending rebound is one of the reasons for the inadequate bending angle.

The main method to overcome bending spring back is the angle compensation method. Generally, the method of making a slope equal to the spring back angle on the bending mold can effectively balance the impact of bending spring back.


Bending bulge

Bending bulge is the phenomenon that the metal material protrudes on both sides of the corner of the sheet metal after bending due to the extrusion of the material, causing the width to be larger than the original size.

To avoid this problem, when drawing the bending expansion diagram, process gaps can be added on both sides of the bending line.

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Anyang Rarlong Machinery Co., Ltd.

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Add:South Guangming Road,Anyang City,Henan Province,China