Shore A，M，D硬度计与IRHD的差别

半百

These are four different methods of determine rubber hardness. All four evaluate hardness as the resistance to penetration of an indentor, but that's where the similarities stop.

Shore A is the most common method of evaluating rubber hardness in North America. Even though it's a manual method, it has been shown to be very accurate and repeatable over the entire spectrum of materials and is not sensitive to the size or shape of the sample being tested, assuming proper measuring technique is used.
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4 X. ~/ s7 |! z6 j/ h& _Shore D is very similar to Shore A, but it's intended for use with plastics. A Shore D measurement of 50 is approximately equal to a Shore A measurement of 90. Shore D is generally not valid for rubber O-rings.
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Shore M as designed specifically to measure finished O-rings. Because it removes the influence of operator technique, the results are more repeatable. However, Shore M results vary with the thickness of the O-ring being tested. A small cross-section O-ring could register as much as 20 points lower than a larger cross-section O-ring of the exact same material. As a result, there is no correlation between Shore A and Shore M measurements. Shore A pass - fail limits are not valid for Shore M results, and vice-versa.
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IRHD is the standard European test for rubber hardness. The equipment is automated (and quite expensive,) but the results are repeatable and generally consistent with Shore A results within about five hardness points.

Micro-IRHD (IRHDM) was designed to test rubber hardness of very small samples. As with Shore M, though, the results vary considerably from one sample thickness to another. IRHDM results to not correlate with other test methods.
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! s: m: o7 y9 R  }2 AShore M, IRHD, and IRHDM are all useful in measuring the consistency of a specific rubber part from batch to batch. However, it cannot be stressed enough that the Shore A hardness limits for a Parker compound CANNOT be used with these test methods to determine if a seal has been properly manufactured.

袍哥

分开来我全都认识,但组合在一起!!!!!!!!!!!!!!!!!!!!!

akedong

基础实用的东西。。。。。。

龙行天下

就是,分开来好认,组合起来就恼火哟

xyhzw

大小写我都能弄熟，乱组合

足球是圆的

呵呵  强烈后悔在学校没学好英语

liulis

全是英文、我也来支持一下。

manfei1974

学习学习，真的很不错的资料！

yantingkai

全是英文的，看不懂啊

温柔的风

谢谢分享,要是汉语的就好了,能更清晰些.