Lower overhang roller type welding extrusion rack of high-frequency longitudinal welded pipe unit

Abstract

The invention discloses a lower overhang roller type welding extrusion rack of a high-frequency longitudinal welded pipe unit. The lower overhang roller type welding extrusion rack comprises a support frame, the support frame is integrally in an inverted U shape, first through grooves are symmetrically formed in two sides of a mounting box, the stability of the structure is kept inside extrusion rollers through a plurality of stabilizer bars, in addition, heat conduction oil is injected to enable the internal pressure to be sufficient, therefore, the device can be ensured to well complete extrusion work, meanwhile, due to the fact that the extrusion rollers are preliminarily heated by the heat conduction oil inside, heat loss caused when a hot steel belt makes contact with the extrusion rollers in the initial state is avoided, the extrusion forming precision can be more effectively guaranteed, the rejection rate can be more effectively reduced, the quality problems such as cracks generated on the outer wall surface due to temperature reduction are avoided, meanwhile, cooling of the two extrusion rollers is accelerated, so that cooling can be performed more quickly and effectively, the effect of quick replacement is achieved, the replacement time is shortened, and the working efficiency is indirectly improved.

Description

technical field [0001] The invention relates to the field of straight seam welded pipe machines, in particular to a bottom hanging roller welding extrusion frame of a high frequency straight seam welded pipe unit. Background technique [0002] The high-frequency straight seam welded pipe unit feeds metal strips such as steel strips, aluminum strips, and copper strips of a certain specification into the equipment, and curls the metal strips into tube blanks through forming rollers, and then uses the high-frequency proximity effect and skin effect to make the tubes The edge is quickly heated to the welding temperature, and the welding is completed under the extrusion force of the extrusion roller, and finally the welded pipe shape of the required specification is formed through cooling, sizing and straightening steps. [0003] The welding extrusion frame is an important part of the high-frequency straight seam welded pipe unit. Its function is to apply a certain pressure to th...

AI Technical Summary

Problems solved by technology

[0004] But there are some deficiencies in the existing devices. First, due to the continuous work, the outer surface of the squeeze roller is severely worn under thermal stress and constant friction. , resulting in leaks in extrusion precision, resulting in increased scrap rates and affecting work quality

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