Rolling method of front crossbeam eleventh section of automobile variable thickness rear floor

A technology of rear floor and front beam, applied in the direction of metal rolling, metal rolling, metal rolling stand, etc., can solve the problems of unsuitability for rolling, increase the weight of parts, etc., and achieve improved connection strength and impact resistance. Good, simple design effect

Active Publication Date: 2019-03-19
上海宝钢新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method will increase the weight of the parts
The Chinese patent application with the application number 201810862659.6 also discloses a rolling method, but this method is not suitable for the rolling of the eleventh section of the rear floor front beam of variable thickness cars

Method used

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  • Rolling method of front crossbeam eleventh section of automobile variable thickness rear floor
  • Rolling method of front crossbeam eleventh section of automobile variable thickness rear floor
  • Rolling method of front crossbeam eleventh section of automobile variable thickness rear floor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a) HC950 / 1300HS+AS aluminum-silicon-coated hot-rolled steel coil with a specification of 1.9*471mm is used.

[0028] b) Unequal thickness rolling, speed 10m / min, input rolling specifications and corresponding parameters in the program:

[0029] Specification mm

1.7

1.5

1.25

1.15

0.95

Roll gap mm

2.08

1.58

1.13

0.98

0.74

Rolling force 10KN

130

255

345

373

400

[0030] Coiling, strip threading, rolling start, gauge change program input, coiling, unwinding.

[0031] Experiments have proved that this kind of thickened automobile rear floor front beam has eleven sections, the length accuracy is ±2mm, the thickness tolerance is ±0.03mm, and the flatness of the plate is very good. The specific rolling curve is as follows figure 1 As shown, the rolling process is as follows figure 2 shown.

Embodiment 2

[0033] a) HC950 / 1300HS+AS aluminum-silicon-coated hot-rolled steel coil with a specification of 1.9*471mm is used.

[0034] b) Unequal thickness rolling, speed 8m / min, input rolling specifications and corresponding parameters in the program:

[0035] Specification mm

1.7

1.5

1.25

1.15

0.95

Roll gap mm

2.11

1.61

1.15

1.02

0.78

Rolling force 10KN

120

244

336

365

390

[0036] Coiling, strip threading, rolling start, gauge change program input, coiling, unwinding.

[0037] Experiments have proved that this kind of thickened automobile rear floor front beam has eleven sections, the length accuracy is ±2mm, the thickness tolerance is ±0.03mm, and the flatness of the plate is very good. The specific rolling curve is as follows figure 1 shown.

Embodiment 3

[0039] a) HC950 / 1300HS+AS aluminum-silicon-coated hot-rolled steel coil with a specification of 1.9*471mm is used.

[0040] b) Unequal thickness rolling, speed 6m / min, input rolling specifications and corresponding parameters in the program:

[0041] Specification mm

1.7

1.5

1.25

1.15

0.95

Roll gap mm

2.15

1.64

1.17

1.06

0.82

Rolling force 10KN

115

238

330

360

386

[0042] Coiling, strip threading, rolling start, gauge change program input, coiling, unwinding.

[0043] Experiments have proved that this kind of thickened automobile rear floor front beam has eleven sections, the length accuracy is ±2mm, the thickness tolerance is ±0.03mm, and the flatness of the plate is very good. The specific rolling curve is as follows figure 1 shown.

[0044] The production line that realizes the above method is as image 3 As shown, it mainly includes: an uncoiler 1, a coiler 12, two sets of pinch rollers 2 are arra...

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Abstract

The invention relates to a rolling method of a front crossbeam eleventh section of an automobile variable thickness rear floor. The rolling method comprises the following steps that an aluminum-coatedsilicon material is selected as the raw material for a front crossbeam of the automobile rear floor, rolling is carried out by a steel plate rolling method, the rolling speed in the controlled rolling process is 4-10m/min, the rolling force is 1000-4500kN, a roll gap is 0.7-2.2 mm, the roller spacing is controlled and adjusted in real time, and a plate changing continuously in the rolling direction according to the customized thickness is obtained. Compared with the prior art, the rolling method of the front crossbeam eleventh section of the automobile variable thickness rear floor has the following beneficial effects that 1, the variable thickness plate has no weld joint, and the surface quality is good; 2, a transition area is used instead of a welding joint, and the connection strengthis greatly improved; 3, continuous production is achieved, the production efficiency is high, and the thickness combination is flexible; 4, connection of the transition area is smooth, and the designof a stamping die is simple; and 5, the transition area has a good energy absorption effect and better impact resistance performance.

Description

technical field [0001] The invention relates to the processing and manufacture of steel products for automobiles, and more particularly relates to a rolling method of eleven sections of the rear floor front beam of variable thickness automobiles. Background technique [0002] The general trend of today's automotive technology development is energy saving, environmental protection, safety, comfort, intelligence and networking. Reducing fuel consumption and reducing emissions on the premise of ensuring performance is one of the problems that need to be urgently solved in the automotive field today. Automobile lightweight is the solution An important approach to this problem, and become the mainstream of modern car design and manufacture. The lightweight of the car body is very important to reduce the weight of the whole car, improve the fuel economy of the whole car, and save energy and protect the environment. For every 100kg reduction in vehicle weight, at least 0.6L of fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B38/04B21B38/00
CPCB21B1/22B21B38/00B21B38/04B21B2265/12B21B2271/02B21B2275/06
Inventor 曹栋杰王强袁洁敏刘鹏
Owner 上海宝钢新材料技术有限公司
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