1、 The shape of metal stamping and stretching should be as simple and symmetrical as possible, and it should be formed in one deep drawing as much as possible.

Secondly, while ensuring the necessary appearance quality, there should be traces that can occur during the stretching process on the surface. Thirdly, while ensuring installation requirements, the side wall of the stretching component should have a certain slope.

Fourth, the scale indication of metal stamping and stretching parts cannot indicate the internal and external dimensions together.

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Fifth, the bottom and wall of the stretching part, the flange and wall, and the corner radius of the rectangular part should be appropriate.

. 6. The spacing from the hole edge on the bottom or flange of the stretching part to the side wall should be appropriate.