标题: IEC 60950-22附录D的测试问题 [打印本页] 作者: someone 时间: 2009-2-17 14:54 标题: IEC 60950-22附录D的测试问题 谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests？; c/ j+ E2 a, m4 c
, Z( j$ {4 ^9 M- U5 z( o其中的0 v1 p- B: R; n% ]" ~6 X
D.2 Tensile strength and elongation tests / O& c/ |. O$ {- Y+ A4 z- y9 cThis test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall ( M- V# p$ X# h% s2 W; Bbe of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air 5 ]! y" Q* O7 V* M3 U) q. Mfor 168 h have a tensile strength of not less than 75 % and an elongation of not less than0 ?" x' l0 V, ]* k0 P3 F
60 % of values determined for unaged samples. At the conclusion of the tests, there shall be / x9 K9 ^0 b Y" hno visible deterioration, deformation, melting, or cracking of the material and the material ) N$ B4 i1 N$ b: c$ ^. K2 lshall not harden as determined by normal hand flexing. + \ x l8 l, ]( ^ % `( I" o; m7 W3 H4 y& F \这里抗拉强度和伸长率怎么测定？试验方法如何？有参考标准吗？950-22这部分讲的太含糊了。作者: someone 时间: 2009-2-18 11:10
没人做过抗张强度试验吗？作者: hdf590 时间: 2009-2-18 22:29
参照标准UL157 Gaskets and seals作者: sunff2008 时间: 2010-1-10 18:06
我也困惑这个问题作者: 豆浆油条 时间: 2010-1-12 19:18
没做过抗张强度试验作者: mutou217 时间: 2012-10-23 16:29
是否所有的密封作用的材质都要做附录D的所有测试？$ S! C7 m, Z% x9 h0 Z/ i
如果使用的材质本身就不能够拉伸呢？