In the design of punching holes on parts, appropriate hole margins and hole spacing should be considered to avoid punching. The minimum distance between the punched edge of the part and the shape is limited depending on the shape of the part and the hole. When the edge of the punching hole is not parallel to the edge of the part shape, the minimum distance should not be less than the material thickness t; when it is parallel, it should not be less than 1.5t.
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