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发表于 2016-10-26 21:44:54
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第十部分:深入了解金属冲裁切削工艺
Cutting Basics
Piercing Misconceptions
If you participated in a tool and die apprenticeship, you probably were taught the following rules for piercing punches:
The punch determines the hole size.
The cutting clearance always should be even (equal) around the punch.
10 percent of the metal's thickness is a good cutting clearance for each side of the punch.
These are good starting guidelines for cutting, but they aren't entirely true. Let's examine each misconception.
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