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1·The temperature field in welding HAZ was studied and analyzed. Welding heat curve was set up by argon-shielded tungsten arc welding experiment.

通过钨极氩弧焊试验，对焊接热影响区温度场进行分析和研究，建立了焊接热循环曲线。

2·RBF Network and SVM model are used to set up the image model of arc sound signal and welding state in order to realize the pattern recognition on-line of the welding conditions.

利用R BF人工神经网络及SVM模型建立电弧声信号与焊接状态的映射模型，从而实现焊接过程状态的模式识别。

3·In this thesis, a set of control system is developed for IGBT inverter power supply of consumable-electrode CO2 shielded arc-welding machine.

本文为熔化极CO2保护的IGBT逆变半自动弧焊机电源研制了一套控制系统。

4·Welded pipe that bended by hot bending method with a set of specific die and welded by plasma arc welding method was used as tubular blank of SPF.

采用焊管作为管坯 ，焊管弯曲采用专用模具热弯 ，焊接采用等离子弧焊。超塑成形采用多层模结构 ，用模具来控制波形。

5·The harmonious control idea of the short circuiting transfer of the CO2 shielded arc welding is put forward in this paper, and its control system is set up.

提出了CO2气体保护焊短路过渡的和谐控制思想，并建立了相应的控制系统。