Flexible manufacturing method of thin-wall complex bent pipes

Abstract

The invention discloses a flexible manufacturing method of thin-wall complex bent pipes. The method comprises the following steps: dividing a bent pipe into two workpieces in mirror symmetry, calculating an extension drawing of the two workpieces, and reserving appropriate flanging quantity; welding line and process supplementary region used for pressurization, mounting a pipe joint (1) used for pressurization on one workpiece; and pressurizing and bulging with gas or liquid by virtue of the pipe joint (1) after direct butt welding or flanging welding is carried out on the two workpieces, or correcting shape by utilizing a local bulging tool directly or manually, wherein the bent pipe can be composed of one section or multiple sections, also can be a special pipe or variable-cross-section pipe and also can be a variable-bend-radius pipe. The flexible manufacturing method of the thin-wall complex bent pipe can be used for changing the processing mode of bent pipe die moulding, flexible manufacturing of the thin-wall bent pipe in a complex shape can be realized, and the production cost can be reduced.

Description

technical field [0001] The invention discloses a flexible manufacturing method for a thin-walled complex bent pipe, relates to a plastic forming method for pipe fittings, and belongs to the field of mechanical engineering. Background technique [0002] Thin-walled elbows are widely used in various industries, aerospace, ships, automobiles, heat exchangers, construction and other industries are inseparable from the extensive use of thin-walled elbows. Thin-walled elbows are light in weight, can save materials and reduce product weight, so they are more and more widely used in pipe network systems installed in space. Existing pipe bend forming technology generally relies on molds or is divided into two workpieces to be formed and welded separately, but when forming thin-walled straight pipes, defects such as instability and wrinkling, cross-section distortion and excessive wall thickness reduction are often generated, which are especially difficult. Realize the forming of thi...

AI Technical Summary

Problems solved by technology

The existing elbow forming technology generally relies on a mold or is divided into two workpieces to be formed and then welded separately. However, when forming a thin-walled straight pipe, defects such as instability and wrinkling, cross-sectional distortion, and excessive wall thickness reduction often occur, which is especially difficult. Realize the forming of thin-walled complex bends

There is no suitable manufacturing method for bent pipes, special-shaped pipes, variable-section pipes, and pipes with variable bending radii consisting of two or more sections

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