发明名称 |
Gas metal arc welding system |
摘要 |
Power delivered to the welding arc from a constant current rapid response power supply is controllable to maximize arc stability particularly in out-of-position welding operations. A first control modulates the output current from the power supply between a high value close to the maximum output value and a minimum value just sufficient to maintain the welding arc. The modulation is effected at a given frequency appropriately adjusted in accordance with the electrode material and diameter to maintain optimum spray metal transfer in the welding arc. A further control is effected by pulse width modulating the output from the power supply in accord with a set-in current programmed signal which is compared with a current feedback signal or, alternatively, a set in voltage programmed signal which is compared with a voltage feedback signal. This latter control provides for operation of the power supply in a constant current control mode or alternatively, a constant voltage control mode. Still further control of the power in the welding arc is effected by pulsing the current between base and peak levels at a relatively low frequency which enables control of the weld puddle in out-of-weld positions.
|
申请公布号 |
US4301355(A) |
申请公布日期 |
1981.11.17 |
申请号 |
US19800175357 |
申请日期 |
1980.08.04 |
申请人 |
DIMETRICS, INC. |
发明人 |
KIMBROUGH, ANDREW G.;ROTHERMEL, RONALD R.;VIRI, DONALD P. |
分类号 |
B23K9/12;B23K9/09;(IPC1-7):B23K9/09 |
主分类号 |
B23K9/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|