为了提高电阻点焊机的控制精度,设计了CMOS同期式控制器。电路中除了手按开关的触点外,采用由CMOS集成门电路及半导体元件构成的无触点电路。主电路由SCR(可控硅)及其宽脉冲触发器组成。焊接时间则用CMOS逻辑电路计数控制,控制器的精度和抗干扰性能明显地超过了采用PMOS集成电路的国外同类焊机。研究了热电偶的精密点焊工艺。 In order to improve the control accuracy of the resistance spot welding machine, a CMOS synchronous controller is designed. In addition to the circuit by the hand switch contacts, the use of CMOS integrated gate circuit and semiconductor components contactless circuit. The main circuit consists of SCR (SCR) and its wide pulse trigger components. The welding time is controlled by the counting of the CMOS logic circuit, and the accuracy and anti-interference performance of the controller obviously surpass that of the foreign similar welding machine adopting the PMOS integrated circuit. The precision welding process of thermocouple has been studied.