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自攻螺丝扭力测试（self-threading screw torque test）：. C" ~9 g i* s, n
1。测试对象1 U0 W; t4 u* m0 b) H
5.10.2 Self-threading screws, including sheet-metal screws, used to secure electrical or enclosure component parts in place or together, shall comply with the self-threading screw torque test in Clause 16.14, when the screw threads into nonferrous metal or polymeric material.# m9 R7 ]2 N1 }$ v. I1 E, ]& F
当自螺纹螺丝和铁板牙螺丝用来固定电气或外壳部件在一起时，且这些螺丝是拧入非铁金属或聚合物材料时，这些螺丝就要符合这个测试要求；
: n: b( h+ m* _* g5.10.3 A self-threading or sheet metal screw used for mounting or supporting a part that weighs more than 3.4 kg (7.5 lb) per screw shall comply with the self-threading screw torque test in Clause 16.14.
' n- `7 q/ H: ]: Q( B, J1 F& B当自螺纹螺丝或铁板牙螺丝用来安装或支撑重量超过每个螺丝3.4kg时，这些螺丝就要符合这个测试要求；
$ e, M) n$ ] \1 P5 w) @2.测试的方法。
) ^8 O+ I9 h4 p" m16.14.1 Self-threading or sheet metal screws may be used if threads are not stripped when the screw is tightened with a torque of 3.39 N·m (30 lb·in) and if the part or the assembly supported by the screw withstands for 1 min a force equal to four times the mass of the part or assembly, applied in a direction coincident with the axis of the screw.% w# E* P6 }# z' u* ~
测试方法: 用3.39N.m（30lb.in）的扭力扭紧螺丝, 并在装配表面的螺丝轴向施加于四倍于装配物重量, 螺蚊应不受破坏。 |
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发表于 2007-10-23 10:22
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