关于UL1598里面自攻螺丝扭矩测试
本帖最后由 88169103 于 2012-4-13 16:11 编辑关于UL1598里面的自攻螺丝扭矩测试，下面的测试方法是正确的吗？
16.14.1 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.
1>先用3.39N.m的力拧紧螺丝，在螺丝表面施加螺钉四倍重量一分钟？
2>在螺钉轴方向施加螺钉四倍重量，用3.39N.m的力拧一分钟？
下面这种又是什么情况下要查表测试的呢？
16.14.1 (MEX) Screws may be used if threads are not stripped when the screw is tightened with the
torque given in Table 16.14.1 (MEX) 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.
还请各位前辈指教指教
难道没有人知道这个测试？没一个人回答！
:'(木有人知道么 坐等高人 :D 先用3.39N.m的力拧紧螺丝，然后在螺丝轴线方向上施加4倍于part or assembly的力在part or assembly上1分钟，如果螺纹没有剥落，则此自攻螺钉可以使用。 不清楚哦
页:
[1]
