过去工厂使用的苏产点滚焊机由于多年使用,磨损严重,元件老化,精度降低,急需进行改造。虽然国内有的单位已制出了全部晶体管化的控制箱,质量比较稳定。但苏产控制箱仍具有工作稳定,可靠耐用,电压波动时电流波动小和检修方便等特点。因此对原有苏制控制箱加以改造后使用,从继承性上和经济上考虑也还是有意义的。我们结合工厂的具体情况,并吸取兄弟单位的经验,改装了三台控制箱。经全面测量、试验和试生产考核,证明改装线路设计是合理 Past production plant in the Soviet Union spot welding machine due to years of use, serious wear and tear, aging components, reduce the accuracy, the urgent need to transform. Although some domestic units have made all the transistor control box, the quality is relatively stable. However, Soviet-made control box is still stable, reliable and durable, current fluctuations when the voltage fluctuations and easy maintenance and so on. Therefore, the original Soviet-made control box to be used after transformation, from the inheritance and economic considerations also makes sense. We combine the specific circumstances of the factory, and learn from the experience of brothers units, modified three control box. After a full measurement, test and pilot production assessment to prove that modified circuit design is reasonable