Method of automatic welding of manual arc welding machine

Abstract

The invention relates to a method of automatic welding of a manual arc welding machine. The method is characterized by comprising the following steps of: a. selecting round steel (4) which has same components with a work piece (2) to be welded as welding material, with corresponding welding agent (5) as welding accessories; b. spot-welding a steel plate (6) as a starting weld tab at one end of the work piece (2) to be welded at a position aligning a welding seam, laying pre-prepared isolating paper (3) on the welding seam, eliciting 2 to 3cm from the starting weld tab; c. aligning the round steel as welding material on the isolating paper, laying a welding agent (5) with the thickness of 3 to 4cm; exposing the welding agent by 2 to 3mm by the arc starting end of the round steel (4) in therange of the isolating paper (3), with the wire connecting end being exposed out of the working piece by 3 to 5cm; (d) connecting the wire connecting end of the round steel (4) with the negative electrode of a manual arc welding machine (1), connecting the work piece (2) with the positive electrode of the manual arc welding machine with selected welding current of 120 to 300A; and e. connecting the negative electrode of another electric welding machine (8) with the work piece (2); connecting the negative electrode with welding tongs (9); and spot-welding starting arc between the starting arc tab and the round steel (4) as welding material by a welding strip (10).

Description

technical field

[0001] The invention relates to a metal welding method, in particular to an automatic welding method of a manual arc welding machine. Background technique

[0002] Welding is a main method of steel structure product processing. Welding methods include manual arc welding and automatic welding. Compared with the two methods, the cost of manual arc welding is low, suitable for short seams, and the quality and efficiency are low. The efficiency of automatic welding is high and the quality is good, but the cost is also high and special automatic welding equipment is required. Judging from the current welding process, there is no popularization and application of manual arc welding machine to realize automatic welding. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide an automatic welding method of manual arc welding machine with reliable effect, low cost, simple operation and high efficiency in view o...

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