发明名称 |
METHOD AND APPARATUS FOR EVALUATING WELDS USING STRESS-WAVE EMISSION TECHNIQUES |
摘要 |
<p>METHOD AND APPARATUS FOR FOR EVALUATING WELDS USING STRESS-WAVE EMISSION TECHNIQUES Spot welds are evaluated using stress-wave emission techniques by measuring the stress-wave energy emitted from the weld area during n time intervals of the weld cycle, where n?4. Each of the time intervals corresponds to a different aspect of the weld cycle such as,for example, the initiation of heating, the separate solid-to-liquid phase transformation in each of the articles being welded, material combination within the weld nugget, cooling stresses occurring during resolidification, and post-weld cracking. The energy values obtained for each of the time intervals can be compared with predetermined acceptable energy value ranges for corresponding ones of the intervals and/or compared with predetermined ratio values between two or more of the obtained interval values to determine the quality of a weld.</p> |
申请公布号 |
CA1079843(A) |
申请公布日期 |
1980.06.17 |
申请号 |
CA19760257538 |
申请日期 |
1976.07.22 |
申请人 |
WESTERN ELECTRIC COMPANY, INCORPORATED |
发明人 |
SAIFI, MANSOOR A.;VAHAVIOLOS, SOTIRIOS J. |
分类号 |
B23K31/00;G01N29/14;(IPC1-7):01N29/04 |
主分类号 |
B23K31/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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