High precision butt-welding machine control circuit

The utility model provides a welding machine control circuit, in particular involving a high-precision control circuitry for collision welder. The circuit will mainly solve the technical problems that errors exist between the time electric current goes through the collision welder and the time set in advance. The technical scheme for this utility model is as follows: a high-precision control circuitry for collision welder includes major loop of the collision welder, which is characterized in that buttons in series and time relay coil are parallel-connected with the power control rods, and regularly-open point and regularly-closed point of the time relays in series and exchanging contact machine are all parallel-connected with the two sides of the time relay coil. The utility model is used on the collision welder for processing products with metal surface and producing metal boxes, cases and cupboards etc. in batches.