[请教]小孔直径公差分布
easylife
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来自:安徽 淮南
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浏览94次
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提问时间:04-17 19:25
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回答数量:3
如果使用标准钻头钻一小孔,比如钻头直径3mm。
钻出来的孔直径的极限公差一般会怎样分布,是相对3mm双向对称,还是双向不对称?
作统计公差分析时碰到的一个问题,请大家帮忙解答。谢谢!
(见P10)
Exceptions:
If using equal bilateral tolerances may force manufacturing to use nonstandard tools, we should not use it.
For example: We would not want the manufacture to convert a drilled hole diameter from Φ0.125+0.005/0.001 to Φ0.127±0.003,in this case , we want the manufacture to use a standard Φ0.125 drill, if the manufacture sees Φ0.127 on a drawing, he may think he needs to build a special tool.