Plasma and dual TIG (tungsten inert gas) composite welding device and method of medium plate

Abstract

The invention provides a plasma and dual TIG (tungsten inert gas) composite welding device and method of a medium plate, and belongs to the technical field of plasma and TIG welding equipment and method. The device and the method are used for improving the efficiency and welding quality of plasma and TIG welding of the medium plate. The technical scheme is that two TIG welding machines are combined with a plasma welding machine; cooperative control parameters of dual TIG welding are adjusted by a programmable logic controller (PLC), a Linux embedded controller, a CAN bus and an ARM executor so as to realize the cooperative control requirements. According to the device and the method, the plasma and TIG composite welding advantages are fully exerted; the problems that the plasma welding efficiency of the medium plate is low and the quality is difficult to guarantee in the prior art can be solved; the device and the method are innovation of a plasma and TIG composition welding technology. The plasma welding efficiency of the medium plate is effectively improved; the welding quality is guaranteed; the production development requirements can be met; the device and the method have obvious economic effect.

Description

technical field [0001] The invention relates to a combined plasma and TIG welding device and method for medium-thick plates, belonging to the technical field of plasma and TIG welding equipment and methods. Background technique [0002] At present, in the use of plasma welding or its combined welding methods, there are mainly the following three welding methods. [0003] 1. Plasma filler wire welding method. There are two disadvantages in adopting this method: one is the high requirement for the clearance and misalignment of the assembly; the other is the poor adaptability of the welding process. [0004] 2. Plasma and TIG welding methods. TIG welding is the abbreviation of tungsten inert gas shielded welding. Although the good coverage ability of TIG welding method can be used by this method, due to the limitation of TIG welding speed, it is difficult to weld simultaneously with plasma during high-speed plasma welding. At present, manufacturers usually use plasma botto...

AI Technical Summary

Problems solved by technology

There are two shortcomings in this method: one is the high requirements for the gap and misalignment of the assembly; the other is the poor adaptability of the welding process

Although this method can increase the deposition rate, the disadvantage is that the hot wire must be in contact with the base metal to form a conductive circuit, otherwise, welding wire spatter will occur, slag inclusion is easy, and the quality of the weld will be affected.

[0006] The above three methods all have deficiencies that are difficult to overcome, especially in the welding of medium and thick plates. Although the existing plasma and TIG welding methods use different combinations, there are still long welding times and low production efficiency. , Welding quality cannot be effectively guaranteed, and the combined advantages of plasma welding and TIG welding cannot be brought into play, and it is difficult to meet the needs of users, which has become a difficult problem restricting the rapid development of production, which urgently needs to be solved

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