请问铜材料上,表面处理标注 63 RMS是什么意思?

小弟是新手.哪位大虾知道请帮忙回答下.谢谢.

kk6688110 · 发表于 2007-7-31 11:51:27

RMS 是老外的标准用数字乘25.4/1000就好了 63*25.4/1000=1.6 也就是 Ra=1.6

jx2309 · 发表于 2007-8-29 10:21:45

那后面的Ra=1.6 里的Ra是中国的Ra还是英制的Ra呢？

gjlyc19560 · 发表于 2007-8-29 10:25:30

说的清楚点行吗?不太懂了 Ra是只某种元素的含量吗?

jimaman · 发表于 2007-8-29 10:47:04

相当于我们的Ra1.6

wl1985101 · 发表于 2007-10-1 09:43:50

谢谢，我也明白了

007mine · 发表于 2007-10-3 15:01:54

粗糙度!

chengguojun · 发表于 2007-10-4 10:20:01

Ra是啥？

wenzi0511060 · 发表于 2007-10-4 12:21:57

粗糙度!

bwg998 · 发表于 2007-10-6 01:05:38

RMS and Ra both are roughness (or surface finish). RMS means root-mean-square, and Ra is arithmatic average. The different calcuation method results in different reading as following. "A roughness-measuring instrument calibrated for rms average usually reads about 11 per cent higher than an instrument calibrated for arithmetical average. "
[Quote page 701, Machinery handbook 27 edition]

请问铜材料上,表面处理标注 63 RMS是什么意思?

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