新型脉冲电子束焊接偏压电源设计

开发了一种由偏压基值产生电路和偏压脉冲产生电路组成的新型脉冲电子束焊接偏压电源,该偏压电源装置能够实现直流偏压和脉冲偏压自由切换,即在同一套装置上既能够实现常规连续束流电子束焊接,又能够实现脉冲电子束流焊接.偏压基值产生电路控制偏压脉冲基值,偏压脉冲产生电路分别控制偏压脉冲峰值、偏压脉冲频率和偏压脉冲占空比.偏压电源的脉冲频率、占空比、脉冲基值和脉冲峰值均可调节,对应实现脉冲束流的脉冲频率、占空比和脉冲峰值调节.试验证明在平均束流焊透相同材料时,相比连续束流电子束焊接,脉冲电子束焊接热输入减少,焊缝宽度有减少趋势.

Pulsed electron beam welding grid power supply design

A new pulsed electron beam welding grid power supply was developed,which includes gridbias base circuit and gridbias pulse circuit.The power supply can produce both direct current gridbias and pulse gridbias,in another word,it can realize not only direct current electron beam welding but also pulsed beam welding at one equipment.The gridbias base circuit controls gridbias pulse base,while the gridbias pulse circuit controls gridbias pulse peak,gridbias pulse frequency and gridbias duty ratio.The pulsed electron beam welding grid power supply can realize beam current pulsed welding,at the same time,gridbias pulse frequency,pulse duty ratio,pulse base value and pulse peak value can be adjusted continuously,and beam current pulse frequency and pulse base value can be adjusted correspondingly.The test proves that the pulsed electron beam welding impulsion effect made electron beam welding keyhole effect much more evident than direct current beam welding at the same beam current.