A bolt capable of predicting pre-tightening elongation and measuring method
A technology of elongation and length measurement, which is applied to measuring devices, mechanical measuring devices, screws, etc., can solve the problems of low control accuracy and cumbersome measuring methods, so as to simplify the measuring method, improve the measuring accuracy and assembly efficiency, and achieve accurate measurement. Effect
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[0043] The present invention is described in conjunction with accompanying drawing and specific embodiment:
[0044] like figure 1As shown, a bolt that can measure the pre-tightening elongation, the bolt has a bolt head 1 and a bolt shaft 2; the bolt shaft 2 is connected to the lower end of the bolt head 1; the bolt shaft 2 is from top to bottom Be followed by a polished rod and a screw rod; the center of the bolt head 1 and the center of the polished rod of the bolt rod 2 all have a through hole for the length measuring rod 5 to pass through; the center of the screw rod of the bolt rod 2 has a The threaded hole of the threaded connection, and the diameter of the threaded hole in the center of the bolt shank is larger than the diameter of the through hole of the bolt shank; combined figure 2 , the length measuring rod 5 has a threaded section 3 and a measuring section 4 arranged sequentially from top to bottom, the diameter of the threaded section 3 of the length measuring r...
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