Production process of automobile thermal-formed structural component

A production process and thermoforming technology, used in vehicle parts, transportation and packaging, etc., can solve problems such as low yield, achieve good plasticity, good material forming accuracy, and small springback.

Active Publication Date: 2018-11-27
成都华翔汽车金属部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the above technical problems, and to provide a production process for automobile thermoformed structural parts. The process provided by the present invention can solve the problem of yield due to fracture and springback when manufacturing complex-shaped components from ultra-high-strength steel plates. low problem, while also providing a production method for thermoformed automotive parts of different strengths

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A production process for automobile thermoformed structural parts, comprising the following steps:

[0033] 1) Stamping the coil raw material for thermoforming into a required outer contour blank; the coil raw material has a ferrite and pearlite room temperature microstructure, the content of the ferrite is 70%, and the content of the pearlite 30%; the initial strength of the coil material is 500MPa; the chemical composition of the coil material is: C: 0.22%, Si: 0.25%, Mn: 1.2%, P: 0.0015%, B: 0.0015%, Ti: 0.3%,: Nb: 0.1%, Cr: 1.1%, the rest is iron and unavoidable impurities;

[0034] 2) Heat the billet obtained in step 1) to 790°C, keep it warm for 5 minutes, then cool down to 150°C at a cooling rate of 15°C / s, draw a dividing line in the middle of the billet after cooling down, and immerse the billet on one side of the dividing line into silicon Leave standstill in the ethanol solution of magnesium acid magnesium (mass concentration 5%) for 5min, then put into the ...

Embodiment 2

[0040] A production process for automobile thermoformed structural parts, comprising the following steps:

[0041]1) Stamping the coil raw material for thermoforming into a required outer contour blank; the coil raw material has a ferrite and pearlite room temperature microstructure, the content of the ferrite is 75%, and the content of the pearlite 25%; the initial strength of the coil material is 550MPa; the chemical composition of the coil material is: C: 0.26%, Si: 0.28%, Mn: 1.3%, P: 0.0085%, B: 0.0025%, Ti: 0.4%,: Nb: 0.15%, Cr: 1.5%, the rest is iron and unavoidable impurities;

[0042] 2) Heat the billet obtained in step 1) to 800°C, keep it warm for 6 minutes, then cool down to 148°C at a cooling rate of 20°C / s, draw a dividing line in the middle of the billet after cooling down, and immerse the billet on one side of the dividing line into silicon Leave standstill in the ethanol solution of magnesium acid magnesium (5%), then put into the heating furnace and carry ou...

Embodiment 3

[0048] A production process for automobile thermoformed structural parts, comprising the following steps:

[0049] 1) Stamping the coil raw material for thermoforming into a required outer contour blank; the coil raw material has a ferrite and pearlite room temperature microstructure, the content of the ferrite is 80%, and the content of the pearlite 20%; the initial strength of the coil material is 600MPa; the chemical composition of the coil material is: C: 0.28%, Si: 0.35%, Mn: 1.4%, P: 0.015%, B: 0.0035%, Ti: 0.5%,: Nb: 0.2%, Cr: 1.8%, the rest is iron and unavoidable impurities;

[0050] 2) Heat the billet obtained in step 1) to 820°C, keep it warm for 8 minutes, then cool down to 142°C at a cooling rate of 25°C / s, draw a dividing line in the middle of the billet after cooling down, and immerse the billet on one side of the dividing line into silicon In the ethanol solution of magnesium acid magnesium (mass concentration 5%), stand still 10min, then put into heating furn...

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Abstract

The invention provides a production process of an automobile thermal-formed structural component. The production process comprises the following steps of 1) stamping coiled raw materials for thermal forming into a desired outer contour blank; 2) conducting heating and heat preservation operation on the blank, then reducing the temperature at the cooling speed of 15-25 DEG C/s, drawing a partitionline in the middle of the bland after temperature reduction, immersing the portion, at one side of the partition line, of the blank into an ethanol solution of magnesium silicate for standing, and then putting the blank into a heating furnace for complete austenitizing; 3) taking the blank treated in step 2 out of the heating furnace, quickly putting the blank into a thermal forming die, conducting high-temperature stamping formation on a steel blank, and then conducting pressure preservation for 5-10 s; 4) cooling the blank in the die to the room temperature at the cooling speed of 32-35 DEGC/s; 5) taking out a formed piece, and then conducting subsequent processing to obtain the automobile thermal-formed structural component. By means of the process, the yield of finished products whencomponents in complex shapes are manufactured by ultra-high-strength steel plates can be increased. Meanwhile, the invention further provides a production method of thermal-formed automobile components with different strengths.

Description

technical field [0001] The invention belongs to the technical field of production of thermoformed structural parts of automobile bodies, and in particular relates to a production process of thermoformed structural parts of automobiles. Background technique [0002] Auto parts are the foundation of the development of the automobile industry and an important part of the automobile industry. In recent years, the market demand for automotive thermoforming parts has shown an explosive growth trend. The application proportion of thermoforming parts in body-in-white is as high as 45%, and it is expected to more than double in the next five years. The hot stamping process is a relatively mature method for preparing automotive thermoformed parts. [0003] Hot stamping / Hotpress forming process, also known as press hardening, is a new technology that has emerged in recent years and is specially used for stamping parts of high-strength steel sheets for automobiles. It is also a key tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02C21D8/00C21D1/68B23P15/00
CPCB21D22/022B23P15/00B23P2700/50C21D1/68C21D8/005C21D2211/001
Inventor 杜正斌余尚彬
Owner 成都华翔汽车金属部件有限公司
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