A Plastic Constrained Member for Bending Thin-Walled Profiles

A technology of constraining components and plasticity, applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve problems such as uneven deformation, inability to form hyperboloid bending, complex mandrel structure, etc., to ensure the quality of the curved surface, installation and use Simple process and wide range of effects

Active Publication Date: 2017-06-30
倪慨宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, under the huge load of bending forming such as stretch bending or press bending, the thin-walled profiles are subjected to tensile stress or extrusion stress, and the deformation is uneven, and the section will be severely deformed by depression or protrusion, resulting in the deformation after stretch bending. The longitudinal surface of the profile, especially the curved inner side, is often concave or convex
This serious defect in the shape of the curved forming member severely limits the application range of thin-walled profiles
[0004] In order to solve the problem of serious deformation of the thin-walled profile in the process of bending and forming, the cross-section is concave or convex, the Chinese patent document CN103240311A discloses a flexible mandrel for stretch-bending thin-walled hollow profiles, but the structure of the mandrel is relatively complicated The application is not very convenient, and it can only be bent in one plane, and cannot form hyperboloid bending, that is, three-dimensional bending, which limits the application range of thin-walled profiles

Method used

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  • A Plastic Constrained Member for Bending Thin-Walled Profiles
  • A Plastic Constrained Member for Bending Thin-Walled Profiles
  • A Plastic Constrained Member for Bending Thin-Walled Profiles

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the thin-walled profile 1 with an open special-shaped cross-section cooperates with the flexible constraining member body 2 to ensure that the constraining member body 2 completely surrounds the thin-walled profile 1 with an open special-shaped cross-section. The thin-walled profile 1 with open special-shaped cross-section is a profile of metal materials such as aluminum alloy and stainless steel. If the thin-walled profile 1 lacks restraint during the bending process, the surface of the sharply bent part will be convex or concave, seriously affecting the quality of the product. For this reason, the body 2 of the flexible constraining member is designed to constrain the severe bending part of the thin-walled profile 1 to ensure the quality of the bent product. The body 2 of the flexible constraining member is made of plastic materials such as nylon 6 (PA6), cast nylon (MCPA) or polyurethane (PU), and has flexibility. Three-dimensional bendin...

Embodiment 2

[0026] For such as image 3 The semi-closed "mouth" cross-section thin-walled section shown, adopts such as Figure 4 The flexible constraining member shown. The restraining member body 2' is made of plastic materials such as nylon 6 (PA6), cast nylon (MCPA) or polyurethane (PU). That is, three-dimensional bending is realized. The cross-sectional shape of the restraining member body 2' is also a "mouth" shape, which matches the cross-sectional shape of the thin-walled profile. In order to ensure that the constraining component body 2' is smoothly inserted into the thin-walled profile 1, the size of the constraining component body 2' can be designed to leave a slight gap between the constrained component body 2' and the thin-walled profile 1, for example less than 0.2 mm. During the bending forming process, the constraining member body 2' is inserted into the severe bending part of the thin-walled profile for stretch bending or press bending; after the forming is completed, ...

Embodiment 3

[0030] for Image 6 The semi-closed thin-walled profile with a semi-circular cross-section shown has a semi-circular cross-sectional shape of the constraining member body, which is also made of plastic materials such as nylon 6 (PA6), cast nylon (MCPA) or polyurethane (PU). There is a slight gap between the section size and the thin-walled profile, for example, less than 0.2 mm. The body of the constraining member can be used with a metal spacer with a drawing groove as required.

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Abstract

Disclosed is a plastic constraint component for bending a thin wall profile material. The plastic constraint component for bending the thin wall profile material comprises a plastic constraint component body, wherein the plastic constraint component body is made of plastic material and can achieve three dimensional bending, the plastic constraint component body is inserted into the profile material with an enclosed section or the profile material with a semi-enclosed section, or overall surrounds the profile material with an open type deformed section, and thereby restrains the surface of the profile material with the enclosed section, or the profile material with the semi-enclosed section or the profile material with the open type deformed section, and excellent surface quality of the thin wall profile material can be kept when the thin wall profile material severely deforms. The plastic constraint component for bending the thin wall profile material is simple in structure, easy to install and use, and wide in use range.

Description

technical field [0001] The invention relates to a plastic constraining member, in particular to a plastic constraining member used for stretch bending or bending thin-walled profiles. Background technique [0002] In the process of lightweight development of automobiles, metal parts made of thin-walled profiles, especially magnesium-aluminum alloy parts, are used more and more. Due to the complex assembly relationship with other parts, this kind of metal parts requires very high dimensional and shape accuracy. These characteristics determine that the manufacturing equipment of thin-walled metal parts must have high reliability and economy. Some metal parts made of thin-walled profiles are still A-level surface parts of automobiles, which have very high requirements for the surface quality of bending forming. At the same time, metal parts made of curved thin-walled profiles are also widely used in industries such as rail trains and high-speed railway passenger cars. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D7/16B21D37/00B21D37/01
CPCB21D7/16B21D37/00B21D37/01
Inventor 倪慨宇罗小燕聂振国王福才李家伟
Owner 倪慨宇
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