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Hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel

An ultra-high-strength steel and composite forming technology, applied in the field of hot stamping, can solve the problems of poor trimming and punching quality, high cost, and low precision, and achieve good cross-section quality, low punching force, and reduced mold wear Effect

Inactive Publication Date: 2014-07-23
JILIN UNIV
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  • Abstract
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Problems solved by technology

[0006] The invention provides a hot stamping and warm stamping composite forming process and mold for ultra-high strength steel, which are used to solve the problems of poor quality, low precision, high cost and long cycle of trimming and punching of ultra-high strength steel hot stamping parts in the later stage

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  • Hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel
  • Hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel

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Embodiment Construction

[0020] The content of the present invention and its specific implementation will be further described below by taking the hat forming and edge trimming process as an example, in conjunction with the accompanying drawings.

[0021] The hot stamping and warm stamping composite forming process for ultra-high strength steel of the present invention includes the following steps: placing the sheet material heated to an austenitized state in a composite mold → the press applies force to the stamping module, and the convex and concave molds are closed , to complete the hot stamping of the sheet → there is a cooling medium in the mold, and the sheet is quenched at the same time → the press moves the force to the punching module to realize the warm punching of the sheet → due to the action of the spring, the stamping part continues Cooling under pressure → Composite forming is completed, and the formed parts and waste are taken out.

[0022] The ultra-high-strength steel hot stamping an...

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Abstract

The invention provides a hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel. By means of the composite mould, blanking is composited in a hot stamping process, and trimming and punching are performed on sheet metal at a temperature higher than a martensite formation temperature. The hot stamping and warm blanking composite forming technology comprises the following processes of putting the sheet metal of the ultrahigh-strength steel heated to achieve complete austenitizing into the composite mould, performing stamping forming and then performing cooling and quenching; heating sheet metal needing blanking locally, keeping a warm state, performing warm blanking after completion of forming, and performing cooling further in a pressure maintaining mode. The hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel effectively solves the problems of poor quality, low precision, high cost and long period of holes trimmed and punched in the later period of the ultrahigh-strength steel and has great practical significance in production practice.

Description

Technical field: [0001] The invention relates to an ultra-high-strength steel hot stamping and warm stamping composite forming process and a die, belonging to the technical field of hot stamping forming. Background technique: [0002] Safety, environmental protection, and energy saving are the main trends in the development of the current automobile manufacturing industry. According to data, every 10% reduction in vehicle weight can save fuel by 3% to 7%. The use of ultra-high-strength steel hot stamping parts can greatly improve the collision safety of the vehicle while reducing the weight of the vehicle, and has attracted widespread attention in recent years. The main process is to heat the boron-manganese steel plate with ferrite and pearlite structure at room temperature to austenite state, and then send it into a mold with a cooling pipe inside for rapid stamping, and at the same time cool and quench to obtain a uniform martensitic steel plate. Body tissue shapes. Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D35/00B21D37/10
Inventor 徐虹张眸睿吕萌萌陆冠含杨秀臣于婷
Owner JILIN UNIV
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