Causes and solutions for the rebound of New Car stamping parts

First, blanking can ensure the quality of the edge section of the blank, thereby improving the edge state of the blank, and appropriately increasing the material size to effectively determine the size of the concave flanging blank. If the blank size becomes larger or the shape is inappropriate, its size or shape must be changed, and the stamping process must be adjusted to overcome edge rupture.

Secondly, the gap between the convex and concave dies should be uniform, and the radius of the convex and concave dies should be appropriately increased, and the drawing process or shaping process should be increased to ensure that the resistance of the material entering the concave die is uniform, which can effectively overcome shear rupture.

The rebound of New Car stamping parts is caused by insufficient plastic deformation of the material in the deformation zone due to improper process and unreasonable die structure. To solve this problem, first of all, a reasonable process method should be used to improve the stress state of the sheet during the forming process, and secondly, it can be solved by using the rebound angle, rebound radius, die gap, etc.

In order to ensure that Fuel Car do not generate resonance, noise, etc. during driving, it is necessary to ensure that the cover has certain rigidity requirements. When the structural dimensions and shape of the cover do not change, the greater the plastic deformation during the stamping process, the better the rigidity. To ensure sufficient rigidity, the depth of stretching should be appropriately increased during design, or process supplementation should be used to increase it. Plastic deformation can be increased by using stretching ribs, stretching thresholds, and increasing blank holding force to improve the rigidity of stamping parts.