发明名称 |
FORFARANDE OCH ANORDNING FOR INDIREKT METNING AV SKRUVFORSPENNING |
摘要 |
The pre-stressing of a bolt or screw (3) is measured by determining ultrasonically the expansion of the bolt or screw caused by stressing. The change of length is determined in a computer (9) from the time difference for the pulse before and after tightening of the bolt or screw. This change of length is compared with a test bolt or screw subject to the same pre-stressing. An ultrasonic probe 4 5) or an electrodynamic probe may be used, the probe being connected via an ultrasonic unit (8) to the computer (9). <IMAGE> |
申请公布号 |
SE7910209(L) |
申请公布日期 |
1980.06.15 |
申请号 |
SE19790010209 |
申请日期 |
1979.12.11 |
申请人 |
MASCHF AUGSBURG NUERNBERG AG |
发明人 |
HEINRICH D;PRESTEL W;WEISS M |
分类号 |
G01L5/00;B25B23/14;B25B23/142;G01L5/24;(IPC1-7):G01L5/00 |
主分类号 |
G01L5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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