During the stamping process of precision metal stamping parts, sometimes wrinkling occurs and the workpiece is scrapped. What is the reason? Non-standard precision hardware accessories manufacturers to tell you!

The reason is:

1. If there is too much lubricating oil or frequent brushing times, lubricating oil should be used, but not too much; and the brushing position is improper.

2. The blank holding force is not enough, and the gap between the pressing surface is not suitable to cause the problem of "loose inside and outside tight". Improper punching direction of workpiece.

3. The test blank is too soft, the material strength is low, and the blank size is too small to hold the material. The positioning of the blank is unstable, which causes the material to be unable to be pressed locally, and the shape of the pressing surface is improper, resulting in uneven feeding.

The wrinkling phenomenon not only makes the workpiece scrapped, but also affects the cost of precision metal stamping parts processing and the waste of raw materials.

During the heat treatment process, the die of precision stamping parts often deform The method to prevent the deformation of the mold can be reduced and controlled. In general, the heat treatment deformation of precision and complex molds can be prevented by the following methods.

(1) The precision stamping parts are selected according to reasonable materials. For precision and complex molds, micro-deformation mold steels with good materials (such as air-quenched steels) should be selected. For mold steels with severe carbide segregation, reasonable casting should be performed. For larger and uncast mold steels, solid solution double refinement heat treatment can be performed. .

(2) The die structure design of precision stamping parts should be reasonable, the thickness should not be too disparate, and the shape should be symmetrical. For large, sophisticated and complex molds, a combined structure can be used.

(3) Pre-heat treatment of complex dies for precision stamping parts is required to eliminate residual stress during machining.

(4) Reasonably select the heating temperature and control the heating speed. For sophisticated and complex molds, slow heating, preheating and other balanced heating methods can be adopted to reduce the heat treatment deformation of the mold.

(5) Under the condition of ensuring the hardness of the mold, try to use pre-cooling, graded cooling quenching or warm quenching process.

(6) For sophisticated and complex molds, vacuum heating and quenching and cryogenic treatment after quenching should be used as far as possible.