Pushing-type predeformation hydraulic cold roll forming mill

Abstract

The invention discloses a pushing-type predeformation hydraulic cold roll forming mill comprising a workbench, a predeformation jacking machine head and two positioning rollers. The predeformation jacking machine head capable of moving front and back is arranged on the central axis of the workbench, the two positioning rollers are arranged on two sides of the central axis symmetrically, and the positions of the positioning rollers on the workbench are located on two sides of the front of the predeformation jacking machine head. A hydraulic pushing rod is hinged to the rear end of the predeformation jacking machine head through a connecting shaft, and the hydraulic pushing rod is connected with a hydraulic driving device. A graduated scale is fixed to the top of the connecting shaft. The predeformation jacking machine head moves on the workbench forwards and backwards through sliding rails arranged at the bottom. Each positioning roller fixing platform is provided with a horizontal positioning bracket on one side in the direction of the predeformation jacking machine head. The pushing-type predeformation hydraulic cold roll forming mill is simple to operate, high in efficiency, accurate in horizontal concentricity positioning, effective in deformation control and adaptable to production requirements of small-bore cold bends in engineering construction.

Description

technical field [0001] The invention relates to a pipe bending machine, in particular to a push-type anti-deformation hydraulic cold bending forming machine. Background technique [0002] In the engineering construction of petroleum, chemical industry, plumbing and other industries, cold-bent pipe production is one of the basic processes. Although this process seems simple, the quality of cold-bent pipe production directly affects the quality of the entire project. We used to use it in the past The production method of cold-bending pipe is to use single-head or double-head hydraulic pipe bending machine to bend according to the winding method. In this cold-bending method, it is difficult to accurately control the horizontal concentricity of the pipe during the bending process. Uneven stress distribution, serious deformation at the arc (ellipse), excessive thinning of the outer tube wall of the arc, wrinkling inside the arc (wavy wrinkles), etc. Big waste. In addition, the ...

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Problems solved by technology

[0002] In the engineering construction of petroleum, chemical industry, plumbing and other industries, cold-bent pipe production is one of the basic processes. Although this process seems simple, the quality of cold-bent pipe production directly affects the quality of the entire project. We used to use it in the past The production method of cold-bending pipe is to use single-head or double-head hydraulic pipe bending machine to bend according to the winding method. In this cold-bending method, it is difficult to accurately control the horizontal concentricity of the pipe during the bending process. Uneven stress distribution, serious deformation at the arc (ellipse), excessive thinning of the outer tube wall of the arc, wrinkling inside the arc (wavy wrinkles), etc. big waste

In addition, the equipment investment cost is high and the operation is complicated

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