Technique optimization method of cage roll forming machine set of longitudinal welded pipe

Abstract

The invention discloses a technique optimization method of a cage roll forming machine set of a longitudinal welded pipe, belonging to the technical field of mechanical forming, wherein forming technique parameters are obtained by coordinate transformation and iterative process; the invention aims at solving the problem that the current welded pipe manufacturing enterprises basically rely on experience and a cut and try method to obtain the forming technique parameters of cage roll forming machine sets of welded pipes; and the technique optimization method disclosed by the invention has the advantages of providing a better theoretical reference for design methods of cage roll forming technique parameters, shortening the development periods of products with new specifications, decreasing raw material waste and reducing the production cost of longitudinal welded pipes.

Description

technical field [0001] The invention relates to a method in the technical field of mechanical forming, in particular to a process optimization method of a straight seam welded pipe roll forming unit. Background technique [0002] Longitudinal welded pipe production generally adopts roll forming process. The roll forming process is a plastic processing technology that gradually bends metal strips from a straight state to a specific cross-section through sequentially configured multi-pass forming rolls. The structure of the early traditional roll forming unit is the cross arrangement of flat rolls and vertical rolls, which is mainly used to produce small-diameter welded pipes. Later, after continuous improvement, the early forming units began to evolve into the form of flat, vertical rolls + vertical rolls, which can produce The pipe diameter has also developed from a small diameter to a medium diameter. Later, in order to overcome the shortcomings of excessive edge deformati...

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Problems solved by technology

However, for the welded pipe unit that adopts the roll forming process, since the small rolls installed on the frame are adjusted as a whole, and each roll section has nearly 5 degrees of freedom for adjustment (exit, entrance, etc.) Translational movement of width and height and rotation around the roller beam), so it becomes very difficult to calculate the forming process parameters of the corresponding roll section according to the pattern design drawing of the strip

At present, the research on the determination of the forming process parameters of the longitudinal seam welded pipe roll forming unit is basically blank at home and abroad. Most of the welded pipe manufacturers mostly use the experience method or the trial and error method to obtain the forming process parameters of the roll section. It is not only Time-consuming and labor-intensive, increasing production costs, and lack of scientific theoretical basis, it is difficult to quantify and optimize the forming process parameters

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