Preparation method of automobile door frame integrally thermoformed by light-weight dissimilar steel
A dissimilar steel and hot forming technology, which is applied in the field of auto parts, can solve the problems of poor formability, surface wrinkles, and easy cracking of high-strength steel, and achieve the effects of high forming accuracy, no springback, and low cost
Inactive Publication Date: 2019-05-17
SHANDONG JIANZHU UNIV
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Problems solved by technology
The formability of high-strength steel at room temperature is very poor, and the traditional cold stamping forming process will cause problems such as easy cracking, surface wrinkles, and severe springback
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[0018] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0019] Such as figure 1 As shown, the whole door frame is divided into five parts, which are respectively a right vertical frame 1, a lower horizontal frame 2, a left vertical frame 3, a left oblique frame 4 and an upper horizontal frame 5. Different high-strength steel plates are used. Figure 1 The middle right vertical frame 1 and left vertical frame 3 are made of hot-formed steel plate 22MnB5, the lower horizontal frame 2 is made of DP590 steel plate, the left oblique frame 4 is made of QP980 steel plate, and the upper horizontal frame 5 is made of IF steel.
[0020] The right vertical frame 1 and the left vertical frame 3 of the present invention are partly made of hot-formed steel plate 22MnB5 with a thickness of 1.5mm produced by Baosteel, whose composition is 0.22C-0.92Mn-0.17Si (wt.%), and whose strength is at the level of 1500MPa , the elong...
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Abstract
The invention provides a preparation method of an automobile door frame integrally thermoformed by light-weight dissimilar steel. The automobile door frame is formed by five parts and selects high-strength steel plates with different characteristics according to different mechanical property requirements. The processing technology comprises the steps of (1) laser cutting; (2) laser butt-welding; (3) integrally hot stamping and forming; and (4) acid pickling. The preparation method of the automobile door frame integrally thermoformed by the light-weight dissimilar steel provided by the invention has the beneficial effects that the high-strength steel plate material is selected and laser-cut into appropriate size, and integral hot-stamping and forming is adopted after laser butt-welding. Theoverall strength and the plasticity of an automobile front door frame are greatly improved, and the automobile door frame has high rigidity. The deformation resistance and the impact endurance of theautomobile door frame are improved, so that the safety of an automobile is improved; through hot stamping, the door frame is high in forming accuracy and low in resilience; and the tonnage of required stamping equipment is less. The weight of an automobile frame is reduced, so that the lightweight level of the automobile is improved. In addition, the preparation method of the automobile door frame integrally thermoformed by the light-weight dissimilar steel provided by the invention is simple in processing technology and high in efficiency, and meets the requirement of mass production, and the product is excellent in strength and plasticity and stable in quality.
Description
technical field [0001] The invention relates to the technical field of automobile parts, in particular to a method for preparing an automobile door frame. Background technique [0002] The lightweight of the car is to reduce the curb weight of the car on the premise of ensuring the strength and safety performance of the car, so as to improve the power of the car, reduce fuel consumption, and reduce exhaust pollution. In order to save energy, reduce emissions, meet the environmental protection regulations of various countries, and meet the people's increasingly high requirements for automobile performance, automobile lightweight has become one of the main trends in the development of the world's automobile industry. The extensive application of high-strength steel in automobiles is an important trend in the development of lightweight automobiles. Common high-strength steels include dual-phase steel (dual-phase steel, DP steel), hot-forming (Hot-Stamping, HS) steel, and Q&P (...
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IPC IPC(8): B21D53/74B21D53/88B21D22/02B21D37/16B23P15/00
CPCB21D22/02B21D37/16B21D53/74B21D53/88B23P15/00
Inventor 景财年邢兆贺丁啸云吕明桦候玉栋叶道珉吴聪雷启腾涂英明
Owner SHANDONG JIANZHU UNIV
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