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Method of hydroforming elongated tubular parts

A technology for hydroforming and tubular parts, which is applied in the field of molds for hydroforming tubular parts, can solve the problems of increasing the weight of the final part, increasing the cost of materials, etc., and achieves the effect of minimizing stretching and thinning

Active Publication Date: 2016-08-03
FORD GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thicker panels result in thicker parts and increase final part weight
Using thicker tubing also tends to increase material costs

Method used

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  • Method of hydroforming elongated tubular parts
  • Method of hydroforming elongated tubular parts
  • Method of hydroforming elongated tubular parts

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Embodiment Construction

[0016] A detailed description of illustrative embodiments of the invention is provided below. These embodiments are exemplary of the invention, which may be embodied in various and alternative ways. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. Specific structural and functional details disclosed in this application are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0017] refer to figure 1 , shows a hydroformed tubular member 10 comprising an irregular cross-sectional shape. The tubular member 10 has a number of regions 12 of expected high strain (overstretched regions) generally located close to the corners 16 of the tubular member 10 . Windows of regions 18 of expected low strain (low tensile regions) are shown as sidewall portions located generally between regions of expected high...

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Abstract

The present invention provides a method of hydroforming an elongate tubular member including regions of expected high strain and regions of expected low strain. The tubular part is first deformed into the original preform shape by extrusion in a preforming die. The metal in regions of expected low strain is stretched during the preforming step by radially deforming the tubing between the two halves of the preforming die. This initial preform is then expanded with internal hydroforming pressure to form a preformed tubing. This preformed tubing is then hydroformed into a final die to form the final shape of the part. Excess metal in areas of low strain is stretched into areas of high strain in the final hydroforming operation.

Description

technical field [0001] The present invention relates to methods of hydroforming tubular components and methods of designing dies for hydroforming tubular components. Background technique [0002] Hydroforming lightweight materials such as aluminum or high strength steel in order to reduce the mass of the formed part is challenging. Hydroformed parts may have regions of maximum strain that limit formability. If the maximum strength of the component is exceeded in localized areas, the component will crack. While strain may be maximized in certain localized regions, other regions of the hydroformed part may have relatively low levels of strain. Corners and other highly formed regions are generally close to the regions where the greatest strain is typically observed. Regions of greatest strain will also be close to regions of lower strain. [0003] To avoid cracking in high strain regions, more ductile material with lower strength can be used. Thicker tubing may be specifie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/033
CPCB21D26/033B21D26/047Y10T29/49Y10T29/49805
Inventor 谢尔盖·法德勒威奇·高洛瓦申科
Owner FORD GLOBAL TECH LLC
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