How to avoid external and internal sharp corners of sheet metal parts

How to avoid external and internal sharp corners of sheet metal parts

Avoid sharp corners on the outside and inside of sheet metal parts

Safety factors: the sharp corners on the outside of the sheet metal are easy to cause operators or users to scratch their fingers;

Stamping die factors: the sharp corners of sheet metal are also sharp corners on the die. The sharp corners on the die female die are difficult to process. At the same time, they are very easy to crack during heat treatment. During blanking, the sharp corners are easy to collapse and wear too fast, resulting in the reduction of die life. Generally speaking, the fillet radius shall be at least 0.5 times the thickness of the sheet metal and not less than 0.8mm, and T represents the thickness of the sheet metal.

Avoid excessive cantilevers and slots

Long cantilevers and slots shall be avoided for sheet metal parts, otherwise the corresponding punch on the stamping die has small size, low strength and short die life. Generally speaking, the dimension width shall not be less than 1.5 times of the part wall thickness, i.e. a ≥ 1.5T, where a represents the width of cantilever or slot.

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