波控CO2焊短路过渡过程的计算机仿真及试验

Computer Simulation and Experimental Research on CO2 Short-cir.cuit Transfer Welding Under Waveform Control

关键词:  CO₂气体保护焊  计算机仿真  短路过渡  飞溅  AWP波控

Key words:  CO₂ gas shield arc welding  computer simulation  short circuiting transfer  welding spatter  adapting welding phsics process waveform control

摘要:

提高CO₂焊工艺性能、减少飞溅的有效方法之一就是通过改进焊接电源设备,对电弧及熔滴过渡行为加以控制。本文在确定了短路过渡的合理的瞬时电流特征的基础上,提出了CO₂焊短路过渡过程的AWP(Adapting welding physics process)波形控制思想,利用MATLAB的仿真工具建立了数字仿真模型,并得出仿真波形。建立了试验系统,将仿真结果与试验结果相比较,两者的一致性很好,证明了所建模型的合理性和实用性。

Abstract:

One of the methods of getting better CO₂ arc welding technolog performance and decreasing spatter efficiently is improving the arc welding power source and controlling the behavior of arc and droplet transfer.According to the reasonable instantaneous electric current characteristic of short circuiting transfer, the AWP (Adapting Welding Physics Process) wavefonn control thought of CO₂ short circuiting transfer is put forward in this paper.A stinmlation study is made and a simulation wavefonn is obtained.The experimental system is set up and a great number of data is carried out.The result of simulation is suitable for that of experiment ment on the whole, It shows that the simulation model is rational and practicable.