标题: EN71,ASTM F963的拉力测试 [打印本页] 作者: peterxu 时间: 2010-1-23 12:29 标题: EN71,ASTM F963的拉力测试 请问如图所示的卡片,在90N拉开后,旁边的U字母卡片上的缺口是否还可以拉第二次呢?拉第二次就会产生小物件了,欢迎大家讨论,谢谢!!!作者: hewei 时间: 2010-1-23 12:57
EN只拉一次 * h; Q. [$ k7 b' JASTM; 如果合适可以再做扭拉测试作者: peterxu 时间: 2010-1-23 13:31
hewei,你好,请问ASTM哪个条款有提到合适的情况下可以再进行扭拉呢?合适的情况又是指哪些呢?谢谢...作者: hewei 时间: 2010-1-23 15:57
请看8.81作者: peterxu 时间: 2010-1-23 16:09
ASTM F963 08 Clause 8.8 最后的一段话# ^9 H; b' R+ C+ r4 B
Projections, parts, or assemblies $ p0 y' v1 N: A! Y p9 Bthat are mounted rigidly on an accessible rod or shaft designed ; q- ]! M j( b3 o8 m0 Fto rotate along with the projections, parts, or assemblies shall/ A" R& c+ v* w! a) E" }
be tested with the rod or shaft clamped to prevent rotation. If3 y9 q* z/ }) f r: i
a component that is attached by a screw thread that has been3 Z# m z' ~) ]- p1 H! E0 F
assembled by the manufacturer, or that has been assembled to 7 K. J3 R7 K& r. R; u) Xthe manufacturer’s instructions, becomes loosened during application ( ^7 M/ B4 |9 w0 Q/ b, t1 @of the required torque, continue to apply the torque4 X5 C. F0 j% L
until either (1) the required torque is exceeded, or (2) the part+ r3 @# y0 V6 `' h( X9 r4 R+ f
disassembles. The test should be terminated if it becomes 6 k, _* w- _& l% p0 y$ Nobvious that the part under test will continue to rotate at less , Y4 t1 c% Y; Cthan the required torque limit and will not disassemble. 8 v M6 a' G b( `) a d- f/ z7 I, G0 A
8.8.1 8.8.1 If the part disassembles, evaluate it for compliance 4 a* _6 q. E- N1 f4 _7 F6 s0 U0 jwith the appropriate requirements. If the disassembly exposes5 u- R# I8 j2 P* q; q7 W
an accessible component that can be grasped as noted above,' ^+ [0 N% Q6 S- V
repeat the torque test on that component. : _' o# J: Y9 [2 Y9 b9 B" k1 ?% H+ z5 S) j
8.8.1中的the disassembly part是不是指Projections, parts, or assemblies 6 s$ |; Q$ V/ m" x% Rthat are mounted rigidly on an accessible rod or shaft designed % N6 j. o9 U6 s5 W4 l" Q' nto rotate along with the projections, parts, or assemblies shall m1 P; ?2 Y! m h0 ~3 c2 m6 sbe tested with the rod or shaft clamped to prevent rotation.呢??7 g2 l6 I2 p- z# A
如果是的话,那这个纸牌是不是不需要拉呢??谢谢作者: hewei 时间: 2010-1-23 17:16
是指rojections, parts, or assemblies+ D6 _7 V0 p. ?" f; z
that are mounted rigidly on an accessible rod or shaft designed! T) Q8 L. l' ^ o
请看8.98 a- e$ P6 N; H+ s5 I d5 ]
所有拉力应该在扭力的基础上完成,. ?7 b c1 `% F/ |6 b3 `* Z
你试想一下:既然能够做扭力,那么该部件是不是能被食指和拇指夹住,或被牙齿咬住,及0 E E3 a) \( C* f" f+ Y
那么拉力的前提条件就是:能被食指和拇指夹住,或被牙齿咬住,以及可预见的可触作者: peterxu 时间: 2010-1-23 19:04
呵呵,其实这个问题和那个小部件的问题是同根同源的,也是做EN71,如果3+以上不用做滥用测试,那就不会有小部件了,也就不需要加警告语了..................正常使用是不会产生小部件的呀....作者: hewei 时间: 2010-1-23 19:08
PETER 兄:产品是做EN啊!3 x: L2 O8 e6 ^% } p S" S E: g' A
我还以为做ASTM作者: peterxu 时间: 2010-1-23 20:39
赫赫,做是做EN,但我也想搞明白ASTM的问题呀,谢谢hewei 作者: tassx 时间: 2010-1-24 00:39
1。U字母卡片上的缺口不做第二次拉力：你是把整个U卡片作为一个 component 相对钥匙扣来做拉力的，这相当于（或间接于）对缺口做了拉力。 9 t3 [( f' l$ q- h8 J$ @2。the disassembly part 是指 attached by a screw thread that has been assembled by the manufacturer, or that has been assembled to the manufacturer’s instructions, 即可组装和拆卸的，component 与 body 并不容为一体。' g$ E* d1 g! @0 u
3。做EN，对3+滥用是非常有必要的：如拼缝？突出物？
rojections, parts, or assemblies+ D6 _7 V0 p. ?" f; z