CNC welding machine

Abstract

The invention discloses a numerically-controlled electric welding machine and belongs to the field of electric welding machine technology. A thin-wall workpiece is prone to being burnt through due to the fact that heat generated by electric arc is relatively too large, and a part of the thin-wall workpiece is completely melted and falls off. In order the solve the technical problem that a welding machine is prone to burning through the thin-wall workpiece, the following technical measures are taken, an arc starting detection device is connected with a computer, the computer is connected with a power supply control circuit of the electric welding machine, or the arc starting detection device is connected with a timing device, and the timing device is connected with the power supply control circuit of the electric welding machine. The numerically-controlled electric welding machine has the advantages that the working state of the electric welding machine is detected through the arc starting detection device, and timing is carried out through the computer. When the arc burning time reaches user preset time, the computer or the timing device output an instruction for turning off the welding power supply, in this way, the duration of arc burning can be controlled, and the technical defect that in the prior art the electric welding machine is prone to burning through the thin-wall workpiece is overcome.

Description

technical field [0001] The present invention is in the field of electric welding machine technology. Background technique [0002] Welding thin-walled workpieces with electric welding machines is an important part of the daily work of electric welding machines. When welding thin-walled workpieces, generally speaking, due to the poor heating capacity of the workpiece, it is easy to burn through, so welders can only use spot welding to control the arc energy with a short arc starting time to minimize the probability of burn through. During the welding process, the electrode just starts arcing, and the thin-walled workpiece is thin. If the welder cannot pull the electrode away from the workpiece in time to break the arc, the workpiece will be easily burned through. However, if the arc is broken too early, problems such as virtual welding are likely to occur. Therefore, the key to spot welding is that the welding time (arc burning time) must be well supported, so that it can n...

AI Technical Summary

Problems solved by technology

It can be seen that this measure has little effect and the advantages and disadvantages are balanced, even the disadvantages outweigh the advantages. There is still a lot of room for improvement in the existing technology in this respect