Cold roll forming process of square rectangular pipe

Abstract

The invention discloses a cold roll forming process of a square rectangular pipe, and relates to the cold roll forming process of the square rectangular pipe. The process is used for cold roll forming of a round pipe into the square rectangular pipe. In the forming stage, the round pipe is divided into multiple sections of arcs for forming according to the size of each part of the finished square rectangular pipe through the roller figure design, one side edge of the square rectangular pipe is formed by adopting three sections of arcs, the R angle part is formed by adopting one section of arc, and the radiuses of the arc corresponding to the section from the middle position of the side edge to the R angle part are sequentially reduced; and rolling is conducted alternately through flat rollers and vertical rollers, the arc deformation of the upper side and the lower side of the tubular section is increased at the flat rollers, and the arc deformation of the left side and the right side of the tubular section is reduced at the flat rollers. The arc deformation of the left and right sides of the tubular section is increased at the vertical rollers, and the arc deformation of the upper and lower sides of the tubular section is reduced at the vertical rollers. The stability in the rolling process can be improved through the process, workpiece surface abrasion is reduced, roller abrasion is relieved, and the forming quality is improved.

Description

technical field [0001] The invention relates to the forming field of steel pipes, in particular to a cold-bending forming process for square and rectangular pipes, which is used for cold-bending a round pipe into a square and rectangular pipe. Background technique [0002] Cold-formed steel is a variety of high-efficiency and economical steel products. It uses hot-rolled or cold-rolled steel sheets or strips as raw materials, and is rolled into various cross-sectional shapes at room temperature. As a kind of thin-walled, light-weight, high-efficiency steel with large cross-sectional moment of inertia, square and rectangular tubes are more and more widely used in machinery manufacturing industries such as automobiles and aviation, especially in the construction industry in recent years. The quality requirements of square rectangular tubes is also increasing. The traditional circular tube into square rectangular tube design has problems such as too large radius difference bet...

AI Technical Summary

Problems solved by technology

The traditional circular tube into square rectangular tube design has problems such as too large radius difference between adjacent arcs during the forming process, which may easily lead to uneven deformation, uneven forming, easy scratches on the workpiece surface, and increased wear of the rolls.

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