How to weld multi-welding tool head

The key of gas welding is to adjust the flame and master the temperature. I'll tell you how I weld it: first, burn the place where the cutter bar welds the cutter head red, then sprinkle a little borax and drop a little welding water, and then weld the covered electrode directly above the cutter head. 【 When covered electrode is connected with the cutter head, you can grasp the angle of the cutter head at will when welding the cutter. Note that when connecting, the cutter head should not burn too red, as long as it can be connected. After that, burn the trees red. Don't burn the place where the welding water has just dripped. When the welding water melts, put the cutter head on it. At this point, the arbor is red and the cutter head is not red. [Look at the color, the cutter head and cutter bar are similar to red welding, but the temperature is similar. It is best to burn the arbor first, not the cutter head, which will burn the cutter head and the electrodes covered on the cutter head. When burning the mandrel, swing the flame to the cutter head. When the cutter head and the arbor are hot, the cutter head will naturally stick to the arbor when the temperature is similar. At this time, you can adjust the angle of the cutter head at will. It should be noted that the fire should not be burned on the knife all the time, but should be burned and then burned until the angle of the cutter head is satisfactory. Burn covered electrode after welding. It should be noted that the drill bit should not be burned for too long, it is too red. When in use, the drill bit is easy to cut.