CO_2等自动电弧焊接需要CP(恒压)特性的焊接电源;TIG焊接和手工焊接则需要DP(下降)特性焊接电源。如图1所示:本文介绍的多用自动焊机是用一个焊接变压器来获得两种外特性(CP和DP)的电源,因而只用一台电焊机就可以进行COZ焊接、TIG焊接和手工焊接。图2为焊接变压器的模型图,图3是电焊机主电路构成图 CO 2 and other automatic arc welding requires CP (constant voltage) welding power supply; TIG welding and manual welding requires DP (down) welding power. Shown in Figure 1: This article describes the use of multi-purpose automatic welding machine is a welding transformer to obtain two external characteristics (CP and DP) power supply, so only one welding machine can be COZ welding, TIG welding and hand welding . Figure 2 is a model of the welding transformer, Figure 3 is the welding circuit diagram of the main circuit