Ultrahigh strength steel stamping part rebound control method

A technology of ultra-high-strength steel and control methods, which is applied in the field of stamping and forming, can solve problems such as springback of ultra-high-strength steel plates, and achieve the effects of improving forming accuracy, preventing serial movement, and reducing cross-sectional openings

Inactive Publication Date: 2010-02-24
JILIN UNIV
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  • Abstract
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Problems solved by technology

[0005] The invention provides a springback control method of ultra-high-strength steel stamping parts, with the purpose of reducing the problem of serious springback of ultra-high-strength steel plates during the forming process

Method used

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  • Ultrahigh strength steel stamping part rebound control method

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Embodiment Construction

[0012] The method of the present invention will now be further described in conjunction with the accompanying drawings.

[0013] As shown in the accompanying drawings, the mold of the present invention includes main parts such as punch 1, die 4, and top plate 3. The position of the arc is corresponding and the direction is opposite. The arc on the surface of the punch is concave, and the arc on the surface of the top plate is convex. Deformation, after the stamping is completed, this part of the deformation recovers to compensate for the springback of the two side walls, so that the sheet can obtain higher forming accuracy. The more serious, the larger the arc; the springback direction of the side wall of the plate is outward, so the deformation direction of the arc part should be the opposite deformation, that is, the surface of the punch is concave, and the surface of the top plate is convex. The reason why the bottom surface of the punch and the upper surface of the top pl...

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Abstract

The invention provides an ultrahigh strength steel stamping part rebound control method, belonging to the stamping forming technical field. The mould in the method is mainly composed of a terrace die,a die and a top plate, the bottom surface of the terrace die and the upper surface of the top plate are made into dual circular arc surface, when in forming, the terrace die moves down, plates are compacted on the bottom surface of the terrace die by the top plate, so as to cause the plates to generate elastic deformation along the circular arc of the terrace die; and when in discharging, the bent dual circular arc surface generates inverse rebound deformation to compensate rebound deformation of the two sidewalls of a stamping part, and rebound is reduced or even eliminated by control on circular arc radian. Meanwhile the dual circular arc structure can realize reliable location in plate forming, thus improving the integral forming quality of the formed part.

Description

Technical field: [0001] The invention utilizes the bottom surface of the mold punch and the surface structure of the top plate to control the springback of ultra-high-strength steel plate stamping forming, and belongs to the technical field of stamping forming. Background technique: [0002] Improving the safety performance of automobiles and reducing fuel consumption and emissions are the focus of the automobile manufacturing industry. The data shows that reducing the weight of the vehicle by 10% can save fuel by 3% to 7%. Therefore, reducing the weight of the vehicle body is an important means to realize the lightweight of the vehicle body. Due to its dual advantages of reducing weight and improving safety performance, ultra-rigid steel stamping parts have developed rapidly in recent years and are widely used. However, as the strength of the steel plate increases, its formability decreases, and the springback is serious. [0003] Hat-shaped stamping parts are widely used...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02B21D37/10B21D37/12
Inventor 谷诤巍朱超徐虹
Owner JILIN UNIV
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