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Design of compound die for stamping and flanging
OP 10: blanking: round material.

OP20: Drawing: To form the shape of the whole bowl, you need to enlarge the rounded corner R 1 first.

OP30

Punching: turning the bottom hole.

Shaping: get R 1.

Trim: Remove the redundant flange to get the edge of 1.5.

OP40: Turn the hole over.

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Limited knowledge and experience, welcome criticism and correction.

I haven't verified and calculated its turn hole. You can do it yourself. If the hole-turning limit of the material is exceeded, the boss with a certain height can be pulled out in the reshaping stage.

In this scheme, drawing cracks and flange wrinkling should be paid attention to, and Galla drawbead can be considered if necessary.

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