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Internal and external pressurization compound forming method for axisymmetric thin-wall special-shaped curved work piece with large section surface

A special-shaped surface, composite forming technology

Inactive Publication Date: 2007-05-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low dimensional accuracy and high cost in separate forming and combined welding of parts with large cross-section ratio and special-shaped curved surface

Method used

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  • Internal and external pressurization compound forming method for axisymmetric thin-wall special-shaped curved work piece with large section surface
  • Internal and external pressurization compound forming method for axisymmetric thin-wall special-shaped curved work piece with large section surface
  • Internal and external pressurization compound forming method for axisymmetric thin-wall special-shaped curved work piece with large section surface

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Experimental program
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Effect test

specific Embodiment approach 1

[0009] Specific Embodiment 1: (See Figures 1 to 9) The steps of this embodiment are as follows: 1. Select a suitable tube blank 1 according to the characteristics of the axisymmetric large section ratio special-shaped curved surface parts; 2. Make the tube blank 1 by using seamless Thin-walled cylinder or a thin-walled cylinder rolled and welded by plate blanks; 3. In the process of internal pressure forming, the cylinder blank 1 is put into the split mold 3 formed by internal pressure, and the plunger 4 is pushed from the inner side of the cylinder wall. Inject the viscous soft mold material 2, so that the diameter of the tube blank is partially expanded until it fits the mold 3; 4. Open the mold, take out the internal pressure forming parts and remove the viscous soft mold material; 5. During the external pressure forming process, the internal pressure The formed part is put into the core mold 6 and the outer mold 9 of the external pressure forming mold, and the plunger 4 is ...

specific Embodiment approach 2

[0011] Embodiment 2: In this embodiment, the material of the shell 1 is stainless steel, high temperature alloy or titanium alloy. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the grade of the stainless steel in this embodiment is 1Cr18Ni9Ti or 0Cr18Ni9. Others are the same as in the second embodiment.

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Abstract

The invention relates to a composite shaping method of symmetry thin large-section special curvature element, wherein it comprises that; selecting cylinder blank; preparing cylinder blank; putting the blank into shaping mould; pouring adhesive soft mould material along the inner side of cylinder, to expand the diameter of blank until contact the mould; opening the mould, taking out shaped element and removing the adhesive soft mould material; then putting the element into compression mould, and pouring the adhesive soft mould material into the outer side of element to reduce the diameter of blank, until contacting the corn mould; opening mould and taking out the element. The inventive product has uniform wall and high accuracy.

Description

technical field [0001] The invention relates to a method for forming and manufacturing a plate, in particular to a method for forming and manufacturing an axisymmetric thin-walled part with a large section ratio and a special-shaped curved surface. Background technique [0002] Axisymmetric thin-walled special-shaped curved surface parts with large cross-section ratio are a typical type of shell structural parts. The main feature, that is, the difficulty of forming and manufacturing, is that their cross-sectional dimensions vary greatly. For parts with small cross-section changes, internal pressure expansion (such as hydroforming, polyurethane forming, etc.) or external compression diameter (such as electromagnetic forming) can be used to form; If the diameter or external compression diameter is used, it is prone to defects such as local serious thinning, even cracking or wrinkling, and it is impossible to form parts with relatively large cross-sectional changes. For the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/00B21D37/10
Inventor 王忠金高铁军刘建光李毅
Owner HARBIN INST OF TECH
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