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发表于 2007-3-22 16:49:03
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来自： 中国上海
你的应是同轴度的意思( D U+ Z8 H# l
8 y9 n7 f$ F2 W* L4 HT.I.R全称应该是“Total Indicated Runout”意思是“总体指示偏差量”。5 _ m; b* K- F
TIR: total indicator reading (总指示跳动,总指示偏转, 总指示偏离量, 总体指示偏差量,都可以)
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Roundness and Out Of Roundess
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Roundness tolerance, a function of normal shrinkage variations in the metal, is a tolerance zone for concentric circles within which each circular element of the surface must lie. This zone is the total indicator reading(TIR) when the part is rotated 360º. Another, quicker method is achieved by calulating half the difference between the maximum and minimum quantities of range. ±.005” per inch (.127 mm per 25 mm) is a general rule that may be applied. & F2 o' v! l8 X0 V" A; D
Out of Roundness is the radial deviation from a true circle and a given circumfrence.: ~: m8 m( |& t% F F
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[ 本帖最后由 3dwhcyh 于 2007-3-22 16:55 编辑 ] |
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