随着我国工农业迅速发展,气体保护焊已被广泛地采用。目前电子工业的发展,硅整流焊机的使用亦日趋广泛。这种焊机比弧焊机具有很多优点,但由于它对网路电压波动特别敏感,故在生产过程中有可能出现焊接规范的变动而影响焊接质量。我国以前生产的某些焊机,虽然在这方面曾采用过一些补偿和反馈装置,但大多是继电线路,由于时间常数大,反应滞后,效果并不令人满意。某些单位也生产过半自动二氧化碳焊机,但往往采用抽头或碳刷式调压,不能无级调节,焊接时不能及时调节,触点经常被烧损,而且电源外特性单一,不能满足多种工艺方法的要求。为此,我们和北京变压器厂、北京 With the rapid development of our country’s industry and agriculture, gas shielded welding has been widely adopted. The current development of the electronics industry, the use of silicon rectifier welding machine is also increasingly widespread. This type of welder has many advantages over arc welders, but because of its sensitivity to network voltage fluctuations, it is possible that variations in the welding specifications may affect the quality of welds in the production process. Some welding machines previously produced in our country, though some compensation and feedback devices have been used in this respect, are mostly relay lines. Due to the large time constant and lagged response, the effect is unsatisfactory. Some units also produce semi-automatic carbon dioxide welder, but often tap or brush-type regulator, not infinitely adjustable, welding can not be adjusted in time, the contacts are often burned, and the power of a single feature, can not meet a variety of Process method requirements. To this end, we and Beijing Transformer Factory, Beijing