高频复合双钨极氩弧焊方法与数字电源研制
High frequency hybrid twin-electrode TIG welding method and digital power supply design
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摘要: 提出了一种优质高效低耗的新型非熔化极复合焊接工艺方法，并研制出新型高频复合双钨极TIG电源，可同时输出两路电流波形，一路为高频方波电流，其基值电流0~300 A，峰值电流0~100 A，频率0~80 kHz，占空比0~100%，脉冲电流变化率高达50 A/μs；另一路为变极性方波脉冲电流，其正负半波幅值为0~500 A，频率0~100 Hz，占空比0~100%，变极性电流变化率高达300 A/ms.测验结果表明，所设计的高频复合双钨TIG焊电源达到了预期设计目标，高频方波电流在80 kHz频率时仍然具有较快的上升和下降沿.最后采用铝合金板进行了堆焊试验，试验结果表明，焊接过程稳定，焊缝成形良好.Abstract: A new high quality and low consumption type of non-melting welding method was put forward, and a high frequency hybrid T-TIG power supply was developed, which could output two type current waveforms simultaneously. One was high frequency square current waveform with base current of 0~300 A, peak current of 0~100 A, frequency of 0~80 kHz, duty ratio of 0~100%, current rate of change up to 50 A/μs. The other was variable polarity square wave pulse current waveform with output current amplitude of 0~500 A, frequency of 0~100 Hz, duty ratio of 0~100%, current rate of change up to 300 A/ms. The test results of the power source indicated that the design of high frequency hybrid T-TIG power source has reached the anticipated design object, and the high frequency square current still has a rapid rising and falling edge change rate at the frequency of 80 kHz. At last, the welding test was carried out by using aluminum alloy plate, and the test results shown that the welding process was stable and the weld molding was good.
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Keywords:
- variable polarity /
- high frequency /
- square wave pulse /
- twin electrode /
- argon arc welding
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