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Integral forming process method of thin-wall hooped tube workpieces

A technology of overall forming and process method, which is applied in the field of forming and manufacturing of sheet metal parts, can solve the problems such as the inability to realize local deformation self-adjustment, achieve the effects of improving integrity and reliability, avoiding longitudinal welds, and eliminating rollover moments

Inactive Publication Date: 2013-05-01
HARBIN INST OF TECH AT WEIHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process mainly deforms the tube blank by feeding materials at both ends and cooperating with the internal pressure. The forming process can only control the stress state of the tube blank through the internal pressure, and cannot realize the self-regulation of local deformation.
It can only be used for the forming of components without circumferential ribs and the deformation of each part of the bulging zone is not much different

Method used

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  • Integral forming process method of thin-wall hooped tube workpieces
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  • Integral forming process method of thin-wall hooped tube workpieces

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Embodiment Construction

[0048] combined with Figure 1-10 , to further describe the present invention:

[0049] 1. Mold operation preparation,

[0050] a, make mold, mold is made up of upper mold 1, lower mold 4 and sealing punch, mold cavity is divided into feeding zone, bulging zone, and sealing punch comprises left punch and right punch, and above-mentioned is the same as prior art , which will not be described here, an overflow hole 8 is set at the part corresponding to the bulging area of ​​the mold and the reinforcing rib, such as figure 1 , Figure 1.1 , Figure 1.2As shown, the number and diameter of the overflow holes depend on the bulging amount of the component and the height-thickness ratio of the reinforcement. The design principles are as follows: the bulging amount is greater than 15%, the number of overflow holes should be no less than 20, and the cross-sectional area It is not easy to exceed 5% of the initial ribbed tube blank cross-sectional area; the height-thickness ratio ...

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Abstract

The invention discloses an integral forming process method of thin-wall hooped tube workpieces. The technical scheme comprises the flowing steps of: 1, preparing a mould: firstly forming overflow holes in corresponding parts on the mould, welding reinforcing ribs in a thin-wall tubing without welded lines in advance and placing into a mould cavity, performing spotting on the mould, sealing ends of a tube blank, filling a strain rate sensitive medium between the mould and the tube blank, then filling liquid forming medium in the tube blank and applying certain pressure; 2, forming: increasing the pressure of the inside liquid, meanwhile adjusting the flow state of the strain rate sensitive medium to cause a tube body and a reinforcing plate to be deformed in a coordinated way to form qualified parts; and 3, picking up the parts: reducing the pressure to 0MPa, opening the mould and then taking out the parts from the mould. The integral forming process method of the thin-wall hooped tube workpieces has the advantages of few forming processes, low manufacturing cost, high mechanical property of formed members, high dimension precision and the like, and is particularly suitable for forming thin-wall hooped tube workpieces with a sealed complex section shape.

Description

technical field [0001] The invention relates to a forming and manufacturing method of a sheet metal part, in particular to an integral forming process method of a thin-walled ring rib cylindrical part. Background technique [0002] The thin-walled ring rib cylindrical part is a kind of integral sheet metal member with a closed complex cross-sectional shape, which is composed of a special-shaped cavity and a ring rib. Its main feature, that is, the difficulty of forming and manufacturing, is that the cylinder and ribs cannot be integrally formed when the wall thickness is thin. Therefore, for components with a wall thickness of less than 2mm, especially 1mm, engineering has to adopt a compromise method of separate forming and combined welding to complete the forming process of thin-walled ring rib cylindrical parts. Separate forming combined welding refers to cutting the components along the warp and weft into several pieces that can be stamped, spun or superplasticized, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/033
Inventor 初冠南鲁国春王建军燕炳波曹爱玲
Owner HARBIN INST OF TECH AT WEIHAI
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