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Hot stamping forming method

A technology of hot stamping and hot forming steel, applied in the field of hot stamping, which can solve the problems of large size deviation and achieve the effect of reducing internal stress and cooling rate

Active Publication Date: 2021-08-20
SUZHOU PRESSLER ADVANCED FORMING TECHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a hot stamping forming method, which is used to solve the above-mentioned problem of large size deviation

Method used

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Experimental program
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Embodiment 1

[0047] After heating and austenitizing the several-shaped parts, put them into the press for hot stamping. The forming pressures are 700T and 100T respectively. Take a total of 6 points from the front, middle and back of the stamped threshold to measure the dimensions. The measured values ​​are shown in Table 1. As shown, it is worth noting that the position of 6 points is selected in this embodiment to make the selected points more representative, and can cover different positions on the several-shaped parts.

[0048] Through the size comparison of 700T and 100T after forming, it is found that the size deviation of 100T is smaller than 700T, so it is concluded that the smaller pressure value during pressure quenching can reduce the product size deviation.

[0049]

Embodiment 2

[0051] The hot forming steel 22MnB5 is austenitized and placed in a press for stamping to obtain a part with a shape, and then the part is subjected to pressure holding quenching twice to obtain a product. Among them, the pressure during the first holding and quenching is 1150T, and the holding time is 10S; the pressure during the second holding and quenching is 600T, and the holding time is 10S. Select 45 of them as measurement points, and record the error between these 45 points and the theoretical position of the product.

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Abstract

The invention discloses a hot stamping forming method. The hot stamping forming method comprises the following steps that 1, a plate is stamped into a blank with an outer contour; 2, the blank is heated and austenitized; 3, stamping equipment is used for stamping the austenitized blank; and 4, after stamping, multi-step pressure-maintaining quenching is carried out to obtain a product, and the pressure value of the next step of pressure-maintaining quenching is less than that of the previous step of pressure-maintaining quenching. According to the hot stamping forming method, a multi-step pressure-maintaining quenching mode is adopted, a part is formed through martensite formation during first-time pressure-maintaining quenching, and the cooling rate is reduced by reducing the pressure during pressure maintaining in subsequent pressure-maintaining quenching, so that the internal stress in the product forming process is reduced, and the effects of improving the product size and improving the product energy absorption effect are achieved.

Description

technical field [0001] The invention relates to the field of stamping forming, in particular to a hot stamping forming method. Background technique [0002] Hot stamping is a method of processing parts. First, the blank is heated to an austenitized state, and then it is stamped in the corresponding mold with a stamping machine and quenched under pressure to obtain the desired shape and realize the phase transformation of the metal material at the same time. A method of shaping a material. In the step of stamping and holding and quenching, a larger holding pressure is usually used to increase the cooling rate, so as to ensure the performance of the part. When it is necessary to improve the size of the part, it is usually used to adjust the mold to match the part. But when the size of the mold and the holding pressure and time of the press are determined, the size and performance of the parts are basically fixed, and it is difficult to further optimize. The products produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/16B21D22/02C21D9/00
CPCB21D37/16B21D22/02C21D9/00
Inventor 安健陈汉杰黄清傅林
Owner SUZHOU PRESSLER ADVANCED FORMING TECHNOLOGIES CO LTD