摆动电弧传感的窄坡口GMAW过程系统建模和仿真
System modeling and simulation of narrow groove GMAW process for oscillating arc sensing
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摘要: 为了研究窄坡口对焊接过程的影响规律，根据焊接的能量平衡和熔滴平衡等原理对基于摆动电弧传感的GMAW系统进行数值仿真. 针对焊炬高度的大小随着焊炬在坡口中的摆动不断变化，建立了包括焊炬摆动、电弧长度、电弧非线性负载及弧焊电源-电弧四个子系统的数学模型. 并将此数学模型转换为Matlab/simulink环境下，涵盖整个焊接回路的GMAW系统动态特征仿真模型. 结果表明，当焊接工艺参数相同时，运行系统仿真模型，可以获得和实际焊接试验基本相同的电流、电压波形数据.Abstract: In order to study the influence of narrow groove on the welding process, the numerical simulation of GMAW systems based on the oscillating arc sensor has been studied according to the principle of weding energy balance and droplet balance. The mathematical model of four subsystems, including a welding torch oscillation, an arc length, nonlinear arc load and arc welding power source arc, has been built according to the size of the torch height is changing with torch oscillation in the groove. And the mathematical model is transformed into a GMAW system dynamic characteristic simulation model which covers the whole welding loop under Matlab/simulink environment. The results show that when the welding parameters are the same, by operating the system simulation model, the data of the current and voltage waveforms can be obtained which are basically the same as the actual experiments.
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Keywords:
- swing arc sensor /
- narrow groove /
- mathematical model /
- simulation
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