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| 焊接电弧热效率的力学测试方法 |
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张建强1,2, 赵海燕1, 吴甦1, 王承权3, 陈冰泉3
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1.清华大学 机械工程系, 北京 100084;2.武汉大学 材料工程系, 武汉 430072;3.武汉理工大学 材料成型与控制工程系, 武汉 430063
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| 摘要: |
| 基于焊接残余应力与外载荷应力叠加产生残余变形的原理,在焊接试件拉伸试验过程中,测量加载、卸载时试件的位移。并通过计算,可以确定焊接电弧的热效率,同时与焊接热源有效利用率的测试计算方法所得到的焊接热效率值进行了比较。研究结果表明,两种方法得到的焊接热效率值十分接近,因而为焊接热过程计算提供了一种新的确定焊接热效率的方法。 |
| 关键词: 热效率 焊接应力 焊接变形 测试计算 |
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| Mechanical measuring and calculation method of heat efficiency of welding arc |
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ZHANG Jian-qiang1,2, ZHAO Hai-yan1, WU Su1, WANG Cheng-quan3, CHEN Bing-quan3
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1.Tsinghua University, Beijing 10084, China;2.Wuhan University, Wuhan 430072, China;3.Wuhan University of Science and Technology, Wuhan 430063, China
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| Abstract: |
| Based on the superposition principle of welding residual stress and working stress,the heat efficiency of welding arc has been determined by measuring displacement of specimens under loading and unloading,and combining with calculation in the process of tensile experiment of welding specimen.Meanwhile,comparison of the heat efficiency obtained with measuring and calculation method was performed.The results show that welding heat efficiency obtained by two ways are almost the same,the welding heat efficiency can be obtained accurately,this paper has provided a new method of determining welding heat efficiency for welding heat process calculation. |
| Key words: heat efficiency welding stress welding distortion measuring and calculation |
