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我厂有一台苏联进口的“AP—300—1”氩弧焊机,该机稳弧部份闸流管损坏,为解决以国产管子代用问题,进行了试验。首先是采用国产南京牌“ZQM_1-400/3.5“60”、“67”。型闸流管代用,但效果不好,断弧现象严重,输出功率低,无法焊接。后改用ZQM_1-400/3.5“70”型闸流管,效果明显提高,能较好的稳弧,但该管不易购到。最后我们在焊机线路上作了改动(见图),用ZQM_1-400/3.5“60”管也
I have a factory in the Soviet Union imported “AP-300-1” TIG welding machine, the steady flow of the machine part of the thyristor damage, in order to solve the domestic pipe substitution problem, the test. The first is the use of domestic Nanjing card “ZQM_1-400 / 3.5” 60 “,” 67 “. Thyristor substitute, but the effect is not good, severely broken arc, the output power is low, can not be welded. After the switch to ZQM_1-400 / 3.5 ”70“ thyristor, the effect was significantly improved, can be a better arc stability, but the tube is not easy to purchase. Finally, we made changes in the welding line (see photo), with the ZQM_1-400 / 3.5 ”60 Tube also