Automatic welding device and method for welding straight fins on inner wall of long small-bore seamless steel tube

Abstract

The invention relates to an automatic welding device and an automatic welding method for welding straight fins on the inner wall of a long small-bore seamless steel tube, which are characterized in that: the automatic welding device consists of a power-supply control device, a frame (10), a driving device (1), a travelling mechanism (9), a support arm (6), a regulating device (7) of the support arm (6), a wire feeder (8) and a welding gun head (4) with a wire spitting orifice of solder wires; and the automatic welding method comprises that: a steel tube (2) to be welded is fixed relative to the travelling mechanism (9); a straight fin (11) is arranged in the steel tube (2) and are fixed relatively; the welding gun head (4) aligns with a welding starting point, the travelling mechanism (9)is started, and simultaneously the wire feeder (8) and the welding gun head (4) are started for welding; when the travelling mechanism (9) travels, the welding gun head (4) enters the steel tube (2) to perform movable welding along a welding line; and when the welding gun head (4) welds to the end point of the welding line, a travel switch acts, the wire feeder (8) stops feeding the wires, and the welding gun head (4) stops welding so as to complete the welding of one straight fin (11).

Description

1. Technical field [0001] The invention relates to an automatic welding device and a welding method, in particular to an automatic welding device and a welding method for welding straight fins on the inner wall of a small-diameter seamless long steel pipe. 2. Background technology [0002] In industrial manufacturing, it is sometimes necessary to weld straight fins on the inner wall of small-diameter seamless long steel pipes. [0003] For example, in the design and manufacture of heat exchange equipment such as circulating fluidized bed boiler slag cooler, the heat exchange area is a very important parameter. In order to increase the heat exchange area of ​​the heat exchanger and improve the heat exchange efficiency, the usual measures are to increase the heat exchange fins to minimize the volume structure when the heat exchange capacity of the heat exchanger is constant, or to increase the heat exchange efficiency. Under the condition of a certain volume structure, the ma...

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Problems solved by technology

[0005] The object of the present invention is to provide an automatic welding device and welding method for welding straight fins on the inner wall of a small-aperture seamless long steel pipe, which can effectively solve the problem of heat exchange elements (small-aperture seamless long steel pipes) in heat exchange equipment such as slag coolers. ) fin full welding problem, thereby optimizing the manufacturing process of heat exchange elements of such heat exchangers, reducing manufacturing costs and improving production efficiency

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