Automobile B column machining process by using 7075 aluminum alloy material

An aluminum alloy material and processing technology, applied in the field of auto parts processing, can solve the problems of heavy parts weight, lack of clear process technology, not in line with the trend of lightweight automobiles, etc., to achieve the effect of improving formability

Inactive Publication Date: 2017-05-31
上海赛科利汽车模具技术应用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, 22MnB5 steel is mostly used in China to produce automobile B-pillars through thermoforming process. Although its mechanical properties are good, the weight of the parts itself is relatively large, which does not meet the trend of automobile lightweight; 5000 series and 6000 series aluminum alloys are used to produce automobile B-pillars. The performance is difficult to meet the requirements of use; there is no clear process technology for the production of automobile B-pillars using 7075 aluminum alloy sheets, and the thermoforming technology of 7075 aluminum alloy automobile B-pillars is blank in China

Method used

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  • Automobile B column machining process by using 7075 aluminum alloy material
  • Automobile B column machining process by using 7075 aluminum alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Uncoil and blank the 7075 aluminum alloy sheet, and then set it aside.

[0029] 2. Raise the temperature of the solid solution heating furnace to 465°C, put the blanked sheet into the furnace, and keep it warm for 120 minutes.

[0030] 3. Use a mechanical transfer device to take out the sheet and place it on the mold. The transfer time is 10 seconds, and then use 300 tons of pressure to stamp the sheet and hold the pressure for 30 seconds.

[0031] 4. Heat up the aging heating furnace to 120°C, put the formed sheet into the furnace, keep it warm for 20 hours, and then take it out.

[0032] 5. Carry out a tensile test on the aging-treated sheet, and the tensile strength is 517 MPa, and the elongation is 14%, meeting the design requirements.

Embodiment 2

[0034] 1. Uncoil and blank the 7075 aluminum alloy sheet, and then set it aside.

[0035] 2. Raise the temperature of the solid solution heating furnace to 475°C, put the blanked sheet into the furnace, and keep it warm for 30 minutes.

[0036] 3. Use a mechanical transfer device to take out the sheet and place it on the mold. The transfer time is 10 seconds, and then use 300 tons of pressure to stamp the sheet and hold the pressure for 30 seconds.

[0037] 4. Heat up the aging heating furnace to 130°C, put the formed sheet into the furnace, and take it out after 12 hours of heat preservation.

[0038] 5. Carry out a tensile test on the aging-treated sheet, and the tensile strength is 481MPa, and the elongation is 14.5%, meeting the design requirements.

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Abstract

The invention provides an automobile B column machining process by using a 7075 aluminum alloy material. The automobile B column machining process comprises material preparing, solution treatment, stamping quenching, aging treatment and tensile testing. A sheet material is subjected to the solution treatment, stamping quenching and aging treatment under the specific condition, so that the formability of the sheet material is improved, and accordingly, an automobile B column meets the requirements for tensile strength and the percentage of elongation, thereby meeting the requirement of the lightweight of using.

Description

technical field [0001] The invention relates to the processing of automobile parts, in particular to an automobile B-pillar processing technology of 7075 aluminum alloy material. Background technique [0002] The lightweight of automobiles can directly reduce fuel consumption and exhaust emissions, so it has been widely valued by the automobile industry; especially for new energy vehicles, the requirements for lightweight automobiles are more urgent. The density of aluminum is 2.7g / cm 3 , close to 1 / 3 of the steel density (7.8g / cm 3 ). The use of aluminum in a car can significantly reduce the weight of the car. In the last century, European and American countries began to pay attention to the energy saving and emission reduction of automobiles and the important role of aluminum alloy in automobile lightweight. Audi manufactured the world's first all-aluminum car in 1994; in 1999, Audi successfully produced the world's first mass-produced all-aluminum body car, and its bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053
CPCC22F1/053
Inventor 邓林卫原平司天宇姚勋梁杰
Owner 上海赛科利汽车模具技术应用有限公司
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