A compression-expansion composite internal high-pressure forming device and process for torsion parts

Abstract

The invention discloses a technique for compression-expansion composite internal high-pressure forming of a torsion piece, which comprises an upper die plate (5) and a lower die plate (6). Lateral features (7.3) and forward features (7.2) at both ends of the center, and end features (7.1) at the outer ends of the lateral features (7.3) and forward features (7.2), the lateral The cross section of the feature part (7.3) and the forward feature part (7.2) is in the shape of a "concave" whose cross-sectional area gradually increases toward the center of the twist member (7), and the lateral feature part (7.3) and the forward feature part The setting direction of (7.2) is staggered by 90° to provide a compression-expansion composite internal high-pressure forming device and process for torsion parts to reduce production procedures and production costs, ensure the forming accuracy of torsion parts, and improve work efficiency.

Description

technical field [0001] The invention relates to compression molding equipment, in particular to a pressure-expansion composite internal high-pressure forming device and process for a torsion piece. Background technique [0002] At present, in the production of special-shaped torsion parts, because the torsion parts are large-diameter thin-walled pipes, there are complex cross-sections and small diameter-changing corners, and the cross-sections change drastically along the axis, which is easy to cause local stress concentration and even produce Dead wrinkles, the existing torsion parts processing technology usually adopts the molding method of preparing parts by molding and then welding. Therefore, the welded parts are usually part of the feature part of the overall product, and the forming contour and accuracy of the multiple feature parts of the torsion part are more demanding. High, multiple processing procedures have the problem of low positioning accuracy and high scrap ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production of special-shaped torsion parts, because the torsion parts are large-diameter thin-walled pipes, there are complex cross-sections and small diameter-changing corners, and the cross-section changes drastically along the axis, which is easy to cause local stress concentration and even produce Dead wrinkles, the existing torsion parts processing technology usually adopts the molding method of preparing parts by molding and then welding. Therefore, the welded parts are usually part of the feature part of the overall product, and the forming contour and accuracy of the multiple feature parts of the torsion part are more demanding. High, multiple processing procedures have the problem of low positioning accuracy and high scrap rate of parts, and the work efficiency is low, which increases the cost of mold, assembly and material preparation

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