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发表于 2009-7-30 20:51:09
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来自： 中国浙江温州
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$ A. Z8 M& b6 i8 {6 ]我也联系了美国的制图者，刚收到他的回复，基本和上述仁兄的分析吻合。 现分享下他的回复内容，如下：5 l# H, S- ^5 [, n. p
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& V8 `3 H2 |7 @- h6 Q6 Q$ a$ QAccording to ASME Y14.5-1994 para. 2.5, single limits dimensions such as those indicating MAX or MIN:
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8 j+ Y+ b1 `3 G0 F9 ^) _“Single limits are used where the intent will be clear, and the unspecified limit can be zero or approach infinity and will not result in a condition detrimental to the design.”+ _( @' q) E: V+ g& M$ T
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: C/ T4 E2 N1 M( D4 r" u* mTherefore, the .0015 max. radius or chamfer on drawing does not require a radius or chamfer, and the edge can be sharp, but if a radius or chamfer is present, it must not be any larger than .0015 [0.038 mm].
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I hope this answers your question, but if it is still unclear let me know and I will try to explain further.
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谢谢大家的关注！/ j% g6 }/ \. L- k l
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[ 本帖最后由 wangyanwei 于 2009-7-30 20:53 编辑 ] |
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发表于 2009-7-30 14:34:47
:P :P :P :P