Light dissimilar steel integral hot formed vehicle door frame preparation method

A dissimilar steel, hot forming technology, 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: 2018-10-09
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

Method used

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  • Light dissimilar steel integral hot formed vehicle door frame preparation method
  • Light dissimilar steel integral hot formed vehicle door frame preparation method
  • Light dissimilar steel integral hot formed vehicle door frame preparation method

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Embodiment Construction

[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 Middle right vertical frame 1 and left vertical frame 3 are made of hot-formed steel plate 22MnB5, lower horizontal frame 2 is made of DP590 steel plate, left oblique frame 4 is made of QP980 steel plate, and 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 elongation rate is 6-8...

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Abstract

The invention provides a light dissimilar steel integral hot formed vehicle door frame preparation method. A vehicle door frame consists of five parts; and according to different mechanical performance requirements, high-strength steel plates with different characteristics are selected. The machining process comprises (1) laser cutting, (2) laser welding, (3) integral hot punching formation and (4) acid washing. The preparation method has the following beneficial effects: dissimilar high-strength steel plate materials are selected, are cut to proper sizes by laser, and are welded by laser forintegral hot punching formation; the overall strength and plasticity of a vehicle front door frame are greatly improved; the rigidity is higher; the deformation resistance and the impact resistance ofthe vehicle door frame are improved; the vehicle safety is improved; the door frame is high in forming precision and low in rebound through hot punching; and needed punching equipment is lower in tonnage. The weight of the vehicle frame is reduced, so that the vehicle lightness level is improved. In addition, the machining process is simple and higher in efficiency, and meets large-batch production requirements of products; and the products are 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 (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D53/74B21D53/88B21D22/02B21D37/16B23P15/00
CPCB21D22/02B21D37/16B21D53/74B21D53/88B23P15/00
Inventor 景财年邢兆贺吕明桦徐淑波涂英明郭甫
Owner SHANDONG JIANZHU UNIV
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