SU143489A1 - Welding unit of argon-arc pipe welding - Google Patents

Description

There are known methods for the production of electric welded pipes, in which devices are used that ensure the stable welding of pipes and exclude the effect of tensile forces on the metal of the shv until it is completely solidified and they acquire the necessary mechanical strength. However, the use of, for example, support and retaining rolls does not provide a sufficient length for holding the edges of the tubular billet and does not completely eliminate tensile forces on the weld metal with increasing pipe welding speed.

The proposed welding unit differs from the known use of continuous working chains instead of supporting and holding rolls, which allows the edges of the billet to be held under a certain welding pressure at the required length, and the cooler installed in the area of the billet edges retention under a certain pressure. weld metal and the acquisition of the necessary mechanical strength.

This embodiment of the welding unit increases the productivity of the mill and improves the quality of welded pipes.

FIG. 1 shows a diagram of the device of the proposed welding unit; in fig. 2 is a diagram of the connection of the working circuit links and the supporting circuit; in fig. 3 is a diagram of a prismatic link of the operating circuit; in fig. 4 is a schematic of a working chain span.

The welding unit consists of a working chain 7, made of prismatic or enveloping links 2 and 5 of the supporting chains 4, supporting bars 5, sprockets 6 of the working chain, working chain tension mechanism 7, sprockets 8 of the supporting chain, supporting chain tension mechanism 9, bed frame 10, guide carriages Y /, pressure mechanism 12, refrigerator / 5 and welding head M. In order to reduce the resistance v

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