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自攻螺丝扭力测试(self-threading screw torque test):6 O% w6 ]5 Q( n0 {3 Z5 [) W- p, U
1。测试对象- d) c) n5 ^% f: w, U, Z1 T$ a4 _8 |
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.
" h( P: |; c: `# M) }3 b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;. A' y1 u, E4 H# j6 ?
5.10.3 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.' ?/ f) N- [' z; A
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;
4 c4 h& {3 h% m5 m3 T2.测试的方法。
" } Z1 @5 J& t- |. J3 E16.14.1 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.* C% h- G9 B9 s- `# F
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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