Iron lettering is a way of welding
1. For argon arc welding, the welding seam and welding spot are relatively small, which is suitable for thin plate welding. Turn the current down a little, and the gas cylinder needs to have a pressure relief gauge. When the meter is installed on the gas cylinder, it can be seen that the ball in the glass tube on the left side of the meter is blown to the middle position (there should be gas in the gas cylinder). Then, the ground wire of the welding machine is connected, and there is a switch on the top of the welding handle. There is a tungsten electrode in the middle of the front end of the welding handle. When the switch is about one to two millimeters close to the weldment, it will ignite Adjust the proper current for the thickness of the welding object
2. Soldering. Low temperature solder suitable for zinc and iron welding can be selected, such as welding M51 solder is used to assist the flux welding of m51-f. if the welding melting point temperature is 179 ℃, it can be welded by LPG spray gun and electric soldering iron. The key is that the mother temperature can be raised. After the temperature rises, apply the welding wire with flux to the welding part, and melt the welding wire with flux completely by the heat conduction of the matrix.
3.二保焊，铁皮厚度在2mm以上 二保焊就能完成任务，工艺大致定位 电压22V 电流100a 在这个基础上熔深较好。
3. The second welding can complete the task if the thickness of iron sheet is more than 2 mm. The positioning voltage is 22V and the current is 100A. On this basis, the penetration is better.