薄板焊接热循环的测定

Measurement of Welding Heat Cycle of Thin-wall Plate

为了验证薄板焊接温度场数值模拟的正确性,应用虚拟仪器技术设计了一套焊接热循环动态检测系统。通过串联多个数采模块,可以同时测量多达100个点的温度。在本实验中,采用该系统对薄板局部点的焊接热循环进行了测量。结果表明,薄板焊接过程的数值模拟结果与实验检测结果比较吻合,验算了焊接热循环模拟计算结果的合理性,表明该虚拟仪器可以作为多点测量焊接热循环的可靠测试手段。

In order to confirm the accuracy of numerical simulation of welding temperature field of thin wall plate welding, a dynamic measuring system of welding heat cycle was designed with virtual instrument technique, which can acquire temperatures of more than 100 testing points by connecting a dozen of data acquisition modules in serial. The welding heat cycle of a thin plate was measured by using this system. It indicated that the results of numerical simulation match the experimental results comparatively. And the simulation of welding heat cycle was validated. It shows that this virtual instrument is a reliable testing tool for measuring multipoint welding heat cycles at the same time.