CN109482643B - Rolling method for eleven sections of front cross beam of variable-thickness automobile rear floor - Google Patents

Rolling method for eleven sections of front cross beam of variable-thickness automobile rear floor Download PDF

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Publication number
CN109482643B
CN109482643B CN201811267108.1A CN201811267108A CN109482643B CN 109482643 B CN109482643 B CN 109482643B CN 201811267108 A CN201811267108 A CN 201811267108A CN 109482643 B CN109482643 B CN 109482643B
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thickness
rolling
variable
front cross
rear floor
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CN109482643A (en
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曹栋杰
王强
袁洁敏
刘鹏
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Shanghai Baosteel New Material Technology Co., Ltd
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Shanghai Baosteel Packaging Material Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B38/00Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B38/00Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2265/00Forming parameters
    • B21B2265/12Rolling load or rolling pressure; roll force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2271/00Mill stand parameters
    • B21B2271/02Roll gap, screw-down position, draft position
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2275/00Mill drive parameters
    • B21B2275/02Speed
    • B21B2275/06Product speed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

The invention relates to a rolling method of a variable-thickness automobile rear floor front cross beam, which comprises the following steps of: the method comprises the steps of selecting an aluminized silicon material as a raw material of a front cross beam of a rear floor of an automobile, rolling by a steel plate rolling method, controlling the rolling speed in the rolling process to be 4-10 m/min, the rolling force to be 1000-4500 kN, and the roll gap to be 0.7-2.2 mm, controlling and adjusting the distance between rolls in real time, and obtaining a plate which continuously changes according to the customized thickness in the rolling direction. Compared with the prior art, the invention has the following beneficial effects: 1. the variable thickness plate has no welding seam and good surface quality; 2. the transition area is used for replacing a welding seam, so that the connection strength is greatly improved; 3. continuous production and high production efficiency; the thickness combination is flexible; 4. the transition area is smoothly connected, and the design of a stamping die is simple; 5. the transition region has good energy absorption effect and better shock resistance.

Description

Rolling method for eleven sections of front cross beam of variable-thickness automobile rear floor
Technical Field
The invention relates to processing and manufacturing of steel for automobiles, in particular to a rolling method for eleven sections of a front cross beam of a variable-thickness automobile rear floor.
Background
The general trend of the current automobile technology development is energy conservation, environmental protection, safety, comfort, intellectualization and networking, the reduction of oil consumption and emission on the premise of ensuring performance is one of the problems which need to be solved urgently in the current automobile field, and the light weight of the automobile is an important way for solving the problem and becomes the mainstream of the modern automobile design and manufacture. The light weight of the automobile body is vital to reducing the self weight of the whole automobile, improving the fuel economy of the whole automobile, saving energy and protecting environment. When the weight of the automobile is reduced by 100 kilograms, at least 0.6L of fuel oil can be saved per hundred kilometers, and 5g of CO can be reduced per kilometer2And (4) discharging the amount.
In order to meet the requirements of reducing fuel consumption and pollutant emission of automobiles, the idea of drawing materials as required is more and more emphasized when automobile parts are designed, and in the implementation mode, a laser tailor-welded blank is adopted in the eleven-section production mode of the front cross beam of the rear floor of the traditional automobile, so that the laser tailor-welded blank is mature in domestic application at present. But this approach can add weight to the component. The chinese patent application No. 201810862659.6 also discloses a rolling method, but the method is not suitable for rolling eleven segments of a front cross member of a rear floor of a variable thickness automobile.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a rolling method for changing eleven sections of a front cross beam of a rear floor of a variable-thickness automobile.
The invention is realized by the following technical scheme:
the invention provides a method for rolling eleven sections of front cross beams of variable-thickness automobile rear floors, which comprises the following steps of:
the aluminized silicon material is selected as a raw material of the eleven sections of the front cross beam of the variable-thickness automobile rear floor, rolling is carried out by adopting a steel plate rolling method, the rolling speed is controlled to be 5-10 m/min, the rolling force is 1000-4500 kN, and the roll gap is 1.0-2.2 mm, so that the eleven sections of the plate of the front cross beam of the automobile rear floor continuously changing according to the customized thickness along the rolling direction is obtained.
Preferably, the rolling speed is 10m/min, and the rolling force and the roll gap are set as follows:
specification mm 2 1.8 1.5
Gap mm between rolls 2.33 1.66 0.94
Rolling force 10KN 355 541 689
Preferably, the production line used in the rolling method comprises the following devices: the automatic thickness measuring device comprises an uncoiler and a coiler, wherein two sets of pinch rolls are arranged between the uncoiler and the coiler, two loop rolls are arranged between the pinch rolls, a pair of working rolls, a shearing machine, two sets of speed measuring instruments, two pairs of thickness measuring instruments, a set of centering device and a marking machine are arranged between the loop rolls, the shearing machine is arranged in the uplink direction of a production line, the marking machine is arranged in the downlink direction of the production line, the two thickness measuring instruments are arranged between the shearing machine and the marking machine, the working rolls are arranged between the two thickness measuring instruments, one speed measuring instrument is arranged between the shearing machine and the thickness measuring instrument, the centering device is arranged in the downlink direction of the production line and is positioned between the thickness measuring instruments and the working rolls, and the other speed measuring instrument is arranged between the thickness measuring instruments and the centering device.
As a preferred scheme, a purging device is respectively arranged between the lateral thickness gauge and the velocimeter, between the thickness gauge and the working roll, between the working roll and the centering device and between the thickness gauge and the marking machine.
Preferably, a pair of support rollers is arranged outside the working roller.
The rolling of eleven sections of the front cross beam of the variable-thickness automobile rear floor is a new rolling mode, and the weight of parts can be reduced on the premise of not reducing the performance.
Compared with the prior art, the invention has the following beneficial effects:
1. the variable thickness plate has no welding seam and good surface quality;
2. the transition area is used for replacing a welding seam, so that the connection strength is greatly improved;
3. continuous production and high production efficiency; the thickness combination is flexible;
4. the transition area is smoothly connected, and the design of a stamping die is simple;
5. the transition region has good energy absorption effect and better shock resistance.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a rolled curve of a front cross beam eleven segments of a variable thickness automobile rear floor according to the present invention;
FIG. 2 is a rolling flow diagram of a four-high hydraulic reversible cold rolling mill train according to the present invention;
FIG. 3 is a schematic process diagram of a rolling line according to the present invention;
in the figure: 1. an uncoiler; 2. a pinch roll; 3. looping rollers; 4. a shearing machine; 5. a velocimeter; 6. a purging device; 7. a thickness gauge; 8. a support roller; 9. a work roll; 10. a centering device; 11. marking machine; 12. a coiling machine.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
a) A hot rolled coil of HC950/1300HS + AS coated aluminum silicon with the specification of 1.9 x 471mm is adopted.
b) Rolling with different thicknesses at a speed of 10m/min, inputting rolling specifications and corresponding parameters in a program:
specification mm 1.7 1.5 1.25 1.15 0.95
Gap mm between rolls 2.08 1.58 1.13 0.98 0.74
Rolling force 10KN 130 255 345 373 400
Winding up, threading, rolling starting, feeding in a sequence of different rules, winding up and winding down.
Experiments prove that the front cross beam of the thickened automobile rear floor has eleven sections, the length precision is +/-2 mm, the thickness tolerance is +/-0.03 mm, the flatness of the plate shape is good, the specific rolling curve is shown in figure 1, and the rolling flow is shown in figure 2.
Example 2
a) A hot rolled coil of HC950/1300HS + AS coated aluminum silicon with the specification of 1.9 x 471mm is adopted.
b) Rolling with different thicknesses at the speed of 8m/min, inputting rolling specifications and corresponding parameters in a program:
specification mm 1.7 1.5 1.25 1.15 0.95
Gap mm between rolls 2.11 1.61 1.15 1.02 0.78
Rolling force 10KN 120 244 336 365 390
Winding up, threading, rolling starting, feeding in a sequence of different rules, winding up and winding down.
Experiments prove that the front cross beam of the thickened automobile rear floor has eleven sections, the length precision is +/-2 mm, the thickness tolerance is +/-0.03 mm, the flatness of the plate shape is good, and a specific rolling curve is shown in figure 1.
Example 3
a) A hot rolled coil of HC950/1300HS + AS coated aluminum silicon with the specification of 1.9 x 471mm is adopted.
b) Rolling with different thicknesses at the speed of 6m/min, inputting rolling specifications and corresponding parameters in a program:
specification mm 1.7 1.5 1.25 1.15 0.95
Gap mm between rolls 2.15 1.64 1.17 1.06 0.82
Rolling force 10KN 115 238 330 360 386
Winding up, threading, rolling starting, feeding in a sequence of different rules, winding up and winding down.
Experiments prove that the front cross beam of the thickened automobile rear floor has eleven sections, the length precision is +/-2 mm, the thickness tolerance is +/-0.03 mm, the flatness of the plate shape is good, and a specific rolling curve is shown in figure 1.
The production line for implementing the method is shown in fig. 3, and mainly comprises: the uncoiler 1, the coiling machine 12, be equipped with two sets of pinch rolls 2 between uncoiler 1 and the coiling machine 12, be equipped with two loop rolls 3 between two sets of pinch rolls 2, be equipped with a pair of work roll 9 between two loop rolls 3, a cutter 4, two sets of tachymeter 5, two pairs of pachymeter 7, a set of centering device 10 and a marking machine 11, cutter 4 sets up in the up direction of production line, marking machine 11 sets up in the down direction of production line, two pachymeter 7 all set up between cutter 4 and marking machine 11, a pair of work roll 9 sets up between two pachymeter 7, a tachymeter 5 sets up between cutter 4 and pachymeter 7, centering device 10 sets up in the down direction of production line, and be located between pachymeter 7 and work roll 9, another tachymeter 5 sets up between pachymeter 7 and centering device 10. And a purging device 6 is respectively arranged between the thickness gauge 7 and the velocimeter 5, between the thickness gauge 7 and the working roll 9, between the working roll 9 and the centering device 10, and between the thickness gauge 7 and the marking machine 11. A pair of support rollers 8 are provided outside the work rollers 9.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.

Claims (6)

1. A rolling method for eleven sections of a front cross beam of a variable-thickness automobile rear floor is characterized by comprising the following steps of:
selecting HC950/1300HS + AS aluminized silicon material with the specification of 1.9 x 471mm AS a raw material of the front cross beam of the variable-thickness automobile rear floor, rolling the variable thickness by adopting a steel plate rolling method, controlling the rolling speed to be 10m/min, and setting the rolling force and roll gap parameters AS follows:
specification mm 1.7 1.5 1.25 1.15 0.95 Gap mm between rolls 2.08 1.58 1.13 0.98 0.74 Rolling force 10KN 130 255 345 373 400
Controlling and adjusting the distance between the rollers in real time to obtain eleven sections of plates of the front cross beam of the rear floor of the automobile continuously changing according to the customized thickness along the rolling direction,
the length precision of the eleven sections of the front cross beam of the variable-thickness automobile rear floor is +/-2 mm, and the thickness tolerance is +/-0.03 mm.
2. A rolling method for eleven sections of a front cross beam of a variable-thickness automobile rear floor is characterized by comprising the following steps of:
selecting HC950/1300HS + AS aluminized silicon material with the specification of 1.9 x 471mm AS a raw material of the front cross beam of the variable-thickness automobile rear floor, rolling the variable thickness by adopting a steel plate rolling method, controlling the rolling speed to be 8m/min, and setting the rolling force and roll gap parameters AS follows:
specification mm 1.7 1.5 1.25 1.15 0.95 Gap mm between rolls 2.11 1.61 1.15 1.02 0.78 Rolling force 10KN 120 244 336 365 390
Controlling and adjusting the distance between the rollers in real time to obtain eleven sections of plates of the front cross beam of the rear floor of the automobile continuously changing according to the customized thickness along the rolling direction,
the length precision of the eleven sections of the front cross beam of the variable-thickness automobile rear floor is +/-2 mm, and the thickness tolerance is +/-0.03 mm.
3. A rolling method for eleven sections of a front cross beam of a variable-thickness automobile rear floor is characterized by comprising the following steps of:
selecting HC950/1300HS + AS aluminized silicon material with the specification of 1.9 x 471mm AS a raw material of the front cross beam of the variable-thickness automobile rear floor, rolling the variable thickness by adopting a steel plate rolling method, controlling the rolling speed to be 6m/min, and setting the rolling force and roll gap parameters AS follows:
specification mm 1.7 1.5 1.25 1.15 0.95 Gap mm between rolls 2.15 1.64 1.17 1.06 0.82 Rolling force 10KN 115 238 330 360 386
Controlling and adjusting the distance between the rollers in real time to obtain eleven sections of plates of the front cross beam of the rear floor of the automobile continuously changing according to the customized thickness along the rolling direction,
the length precision of the eleven sections of the front cross beam of the variable-thickness automobile rear floor is +/-2 mm, and the thickness tolerance is +/-0.03 mm.
4. A rolling method of a front cross member of a variable thickness rear floor panel of an automobile as claimed in any one of claims 1 to 3, wherein the rolling method is performed in a production line comprising: the automatic thickness measuring device comprises an uncoiler and a coiler, wherein two sets of pinch rolls are arranged between the uncoiler and the coiler, two loop rolls are arranged between the pinch rolls, a pair of working rolls, a shearing machine, two sets of speed measuring instruments, two pairs of thickness measuring instruments, a set of centering device and a marking machine are arranged between the two loop rolls, the shearing machine is arranged in the uplink direction of a production line, the marking machine is arranged in the downlink direction of the production line, the two pairs of thickness measuring instruments are arranged between the shearing machine and the marking machine, the working rolls are arranged between the two pairs of thickness measuring instruments, the speed measuring instruments are arranged between the shearing machine and the thickness measuring instruments, the centering device is arranged in the downlink direction of the production line and is positioned between the thickness measuring instruments and the working rolls, and the other set of speed measuring instruments is arranged between the thickness measuring instruments and.
5. The method of claim 4, wherein a purging device is provided between the thickness gauge and the speedometer, between the thickness gauge and the work roll, between the work roll and the centering device, and between the thickness gauge and the marking machine.
6. The rolling method of eleven segments of a variable thickness rear floor front cross member of an automobile according to claim 4, wherein a pair of support rollers are provided outside the work rollers.
CN201811267108.1A 2018-10-29 2018-10-29 Rolling method for eleven sections of front cross beam of variable-thickness automobile rear floor Active CN109482643B (en)

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CN110961454B (en) * 2019-11-22 2021-11-23 苏州东宝海星金属材料科技有限公司 Preparation method of Al-Si coating differential thickness steel plate for hot forming
CN112872035B (en) * 2020-12-22 2022-07-05 上海宝钢新材料技术有限公司 Production process of aluminum-silicon variable thickness plate for thermal forming
CN112935048A (en) * 2021-01-27 2021-06-11 上海宝钢新材料技术有限公司 Lightweight aluminum-silicon variable-thickness plate part and preparation method thereof

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CN101633003B (en) * 2009-07-07 2011-08-17 东北大学 Thickness controlling method and control system in periodicity thickness changing strip rolling process
CN101607264B (en) * 2009-07-07 2012-12-19 东北大学 Periodic longitudinal variable-thickness strip and longitudinal variable-thickness plate and preparation method thereof
CN105772505B (en) * 2014-12-23 2017-12-26 宝山钢铁股份有限公司 Cold rolling Varying Thickness Plates milling method
CN106270718B (en) * 2015-05-20 2018-07-06 宝山钢铁股份有限公司 The equipment of cold rolling Varying Thickness Plates automatic shearing and the cutting method based on the equipment
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Address after: 191 Yuanhe Road, Yuepu Town, Baoshan District, Shanghai, 200941

Patentee after: Shanghai Baosteel New Material Technology Co., Ltd

Address before: 191 Yuanhe Road, Yuepu Town, Baoshan District, Shanghai, 200941

Patentee before: SHANGHAI BAOSTEEL PACKAGING MATERIAL Co.,Ltd.