Why welders should be steady accurate and ruthless

1. Stable center of gravity

Welding is like practicing martial arts. The first thing to do is to have as table chassis, that is, a stable "horse step". When the center of gravity is unstable, it is difficult to weld a good weld when shaking.

2. Welding gun stability

Handshaking will cause tungsten electrode to burn and form tungsten inclusion in the molten pool. The weld edges are irregular and the fish scales are uneven. We can control the spray gun by contacting the weldment with the little finger and ring finger, or stick the ceramic nozzle of argon arc welding to the work piece, and then adjust the length of tungsten electrode to 3-5mm according to the weld depth.

3. Wire feeding stability

The wire feeding method shall be adjusted according to the size of weld groove. If the groove is small, the welding wire can be fed continuously in the center of the molten pool. When the weld width is large, point wire feeding on both sides shall be adopted

"Quasi"and "three quasi"

1.Parameter standard

Welding parameters are the key to welding. It is very necessary to select accurate welding parameters. For vertical welding and flat welding,appropriate welding material specifications and parameters shall be selected according to the actual station and actual plate thickness.It is not easy to start arc when the welding current is small. When the welding current is large, it is easy to weld through.

2.Accurate angle and position

The welding position and welding gun angle will affect the final welding forming, and can avoid welding defects (incomplete fusion, tungsten inclusion and slag inclusion). There are generally saw tooth,crescent, triangle, ring and eight character. The key of vertical fillet welding is how to control the weld pool metal. The welding rod must swing up and down rhythmically according to the cooling of the molten pool metal.

3.Timing

During welding, when the first molten pool appears after arc striking, it shall be raised quickly. When the molten pool cools to dark red spots, lower the arc to the arc pit so that the falling point overlaps the previous molten pool by 2 / 3, and then raise the arc.In this way, the vertical fillet weld is formed rhythmically.

Be cruel to yourself

As the saying goes, freezing three feet is not cold in a day. Good skills are accumulated through continuous practice. Therefore, to practice our skills well, we need to be cruel to ourselves, bear hardships and stand hard work, stand loneliness and work hard.