shenhao168 发表于 2012-4-7 10:32 ( u1 ?& M0 N" O4 _1 W5 W! B c
还没有等到扭力起子有“哒哒”响声,螺丝头已陷进塑胶里去了。我这个螺钉是塑胶外壳的螺丝,和标准内的要求 ...
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那就是有问题了作者: badatong 时间: 2012-4-7 23:44
Compliance is checked by inspection, and screws and nuts transmitting contact pressure or! U& y7 u. A+ m$ v6 C" e9 `
which are likely to be tightened by the user shall be tightened and loosened five times. Screws4 a6 C/ Z& s* @/ ]% i5 b# n. Q
and nuts of insulating material shall be removed completely during each operation of loosening' e/ o! e5 P) Q7 @# h8 ~
of the screws. During the test, no damage impairing the further use of the fixing or screwed connection shall occur. After the test, it shall still be possible to introduce the screw or nutmade of insulation material in the intended manner作者: badatong 时间: 2012-4-7 23:49
拧紧和旋松各5次,所谓拧紧,就是听到“哒哒”响即可,接下来就是(完全)旋松。 ( W; A V8 [ |7 E7 D: z判据:上述试验后,螺钉仍然可以(像原来那样)拧紧进入螺孔,正常使用。否则就NG.作者: zhongfalamp 时间: 2012-4-9 09:41
拧紧和旋松5次,每次拧紧时听到扭力起子“哒哒”声就可停下再旋松,拧完以后螺钉不能滑牙、断裂或沉入螺钉孔内。反之则合格作者: shenhao168 时间: 2012-9-21 09:27 标题: RE: 外壳螺丝扭力测试的方法及判定标准 塑胶外壳上的螺丝在正常使用及维护时都不需扭动的螺丝是否也需要做扭力测试,螺丝时扭到塑胶壳内部,如需要扭力测试,扭力用多少?