WO2009026808A1 - Apparatus of laser stitch welding for large scale sheets - Google Patents

Apparatus of laser stitch welding for large scale sheets Download PDF

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Publication number
WO2009026808A1
WO2009026808A1 PCT/CN2008/071638 CN2008071638W WO2009026808A1 WO 2009026808 A1 WO2009026808 A1 WO 2009026808A1 CN 2008071638 W CN2008071638 W CN 2008071638W WO 2009026808 A1 WO2009026808 A1 WO 2009026808A1
Authority
WO
WIPO (PCT)
Prior art keywords
slipway
clamping mechanism
pressing
laser
laser head
Prior art date
Application number
PCT/CN2008/071638
Other languages
French (fr)
Inventor
Zhigang Xu
Liming Xin
Yong Liu
Shichun Chi
Mingyang Zhao
Original Assignee
Shenyang Institute Of Automation Of The Chinese Academy Of Sciences
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenyang Institute Of Automation Of The Chinese Academy Of Sciences filed Critical Shenyang Institute Of Automation Of The Chinese Academy Of Sciences
Publication of WO2009026808A1 publication Critical patent/WO2009026808A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/035—Aligning the laser beam
    • B23K26/037—Aligning the laser beam by pressing on the workpiece, e.g. pressing roller foot
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • B23K26/0884—Devices involving movement of the laser head in at least one axial direction in at least two axial directions in at least in three axial directions, e.g. manipulators, robots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/244—Overlap seam welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • B23K37/0217—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member being fixed to the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B23K2103/05—Stainless steel

Definitions

  • This invention relates to a mechanical clamping device, particularly to an apparatus of the laser stitch welding for large scale sheets, which can control the flatness and the gap between the two blanks to be welded.
  • a total clamping mechanism placed over a workbench being parallel to Y direction and perpendicular to the slipway, which can be moved up and down; [10] a direct clamping mechanism, mounted on the slipway by means of the bed fixing pedestal located in X direction being moved together with the laser head in Y direction forming a gantry.
  • a work area is enclosed by the total clamping mechanism monitoring the entire blanks assembly and the direct clamping mechanism monitoring weld joints at a close distance from the weld point to meet the metal fit-up requirement.
  • the said total clamping mechanism is made up of a front pressing beams, a rear pressing beams and a pressing wheel; the front and rear pressing beams, respectively placing two sides of the slipway, connects to driven air cylinders for driving up and down; at least two pressing wheels are respectively mounted on the front and rear pressing beam.
  • the said direct clamping mechanism is made up of the laser head, a left pressing roller and a right pressing roller; the left and right pressing rollers connecting to driven air cylinders are disposed on the two sides of the laser head by means of the bed fixing pedestal; the laser head is mounted on the slipway moving together with the left pressing roller and the right pressing roller.
  • the said left and right pressing rollers disposed on the two sides of the laser head are mounted on the bed fixing pedestal by a movable mechanism.
  • the driven air cylinders have a pressure valve.
  • the said laser head which can be moved in X, Y and Z directions is mounted on the slipway by movable mechanism in X, Y directions Advantageous Effects
  • [15] 1 It has a good welding quality.
  • the pressing rollers and pressing wheels provided by the present invention can move down to the welding blanks; the total clamping mechanism monitors the entire blanks assembly and the direct clamping mechanism which clamps at a close distance from the weld point monitors the weld joints to have a good welding quality.
  • Each air cylinder having a pressure valve can adjust the clamping force for the pressing rollers and pressing wheels to the blanks with different thickness to meet the welding requirements of flatness of sheets and minimum gas in between.
  • FIG. 1 is a structural diagram of the invention
  • FIG. 2 is the top view of the clamping device
  • 1 is the laser head
  • 2 is the slipway in Y direction
  • 3 is the first press roller
  • 4 is the right air cylinder
  • 5 is the bed fixing pedestal
  • 6 is the left press roller
  • 7 is the second air cylinder
  • 8 is the third press beam
  • 9 is the front air cylinder
  • 10 is the forth press beam
  • 11 is the rear air cylinder
  • 12 and 13 are the steel blanks
  • 14 is the pressing wheels.
  • this invention includes:
  • the total clamping mechanism is made up of the front pressing beams 8, rear pressing beams 10 and the pressing wheels 14;
  • the front and rear pressing beams 8 and 10 respectively placing two sides of the slipway 2 are connected to the third air cylinder 9 and the forth cylinder 11 respectively which can drive the pressing beam up and down; there are at least two pressing wheels 14 (the present invention has 6 x 2 wheels) on the front pressing beams 8 and rear pressing beams 10 respectively;
  • Each of the third air cylinder 9 and the forth cylinder 11 has a pressure valve (the present invention use high-speed valve) which is used to adjust the clamping force of the pressing wheels 14 to control the flatness of the blanks.
  • the direct clamping mechanism is made up of the laser head 1, the left pressing roller 6 and the right pressing roller 3; the left and right pressing rollers 6, 3 connecting to the second air cylinder 7 and the first air cylinder 4 are disposed on the two sides of the laser head 1 by means of the bed fixing pedestal 5; the laser head 1, the left pressing roller 6 and the right pressing roller 3 are mounted on the slipway 2;
  • Each of the second air cylinder 7 and the first air cylinder 4 has a pressure valve(the present invention use high-speed valve ) which is used to adjust the clamping force of the pressing rollers 3, 6 to control the flatness of the blanks.
  • the laser head 1 is mounted on the slipway 2 by movable mechanism in X, Y directions which can be moved in X, Y and Z directions; the laser head 1 moves in Y directions together with the left and right pressing roller 6, 3 driven by slipway 2; the laser head 1 laid between the left and right pressing roller 6, 3 moves in X, Y and Z directions as reciprocating motion; during the welding process, the total clamping mechanism monitors the deformations of the blanks in the entire working area and moves together with the laser head 1 in Y direction clamps at a close distance from the weld point, which guarantees the welding quality.
  • the blanks (or sheets) 12, 13 are overlapped on the workbench.
  • the third air cylinder 9 drives the front pressing beam 8 down until the pressing wheels 14 on the beam presses the blanks 12, 13, and the forth air cylinder 11 drives the front pressing beam 10 down until the pressing wheels 14 on the beam presses the blanks 12, 13 before welding;
  • the second air cylinder 7 drives the left pressing roller 6 down to the blanks 12, 13 and the first air cylinder 4 drives the right pressing roller 3 down to the blanks 12, 13;
  • the work area is enclosed by the left and right pressing roller 6, 3, and the pressing wheels 14 on the pressing beam, when stitch welding, the laser head moves in X, Y and Z directions shown in Fig.l and Fig.

Abstract

An apparatus of laser stitch welding for large scale sheets includes that: a slipway (2) moves in Y direction; a laser head (1) is mounted on the slipway (2); a total clamping mechanism is placed over a workbench being parallel so Y direction and perpendicular to the slipway (2), which can be moved up and down; a direct clamping mechanism is mounted on the slipway (2) which is moved together with the laser head (1); a work area is enclosed by the total clamping mechanism and the direct clamping mechanism. The apparatus can control the flatness and the gap between two blanks to be welded and obtain a good welding quality.

Description

Description APPARATUS OF LASER STITCH WELDING FOR LARGE
SCALE SHEETS
Technical Field
[1] This invention relates to a mechanical clamping device, particularly to an apparatus of the laser stitch welding for large scale sheets, which can control the flatness and the gap between the two blanks to be welded. Background Art
[2] This stitch laser welding system proposed to combine two large-scale stainless steel blanks overlapped together. Large-scale stainless steel blanks laser welding has the following technical difficulties: In the stitch laser welding of stainless steel blanks being the welding seam may develop irregularities and faults due to the fact that the sheets at the weld point arch in places and therefore they do not be placed flat one against the other. Such faults occur more particularly in the laser welding of large scale sheets (for example, from 6000mm to 12000mm in lengths), due to arching, the two blanks may not be welded together. It is difficult to control their deformations and gaps caused by the deformations under the required value (15%of the sheet thickness), and to clamp them firmly overlapped at least at the weld point by means of the common clamping device. Disclosure of Invention Technical Problem
[3] Problems are of irregularities and faults result from gap between the two blanks to be welded Technical Solution
[4] In order to solving problems of irregularities and faults result from gap between the two blanks to be welded, it is therefore an object of the invention to provide a total- direct clamping mechanism for the continuous stitch welding of sheets overlapped, which can control the flatness and the gap between the two blanks to be welded and control self-deformation of the two blanks.
[5] In order to realize the purposes above-mentioned, the technical program of this invention is as follows:
[6] Includes:
[7] a slipway, moving in Y direction;
[8] a laser head, mounted on the slipway by means of a bed fixing pedestal;
[9] a total clamping mechanism, placed over a workbench being parallel to Y direction and perpendicular to the slipway, which can be moved up and down; [10] a direct clamping mechanism, mounted on the slipway by means of the bed fixing pedestal located in X direction being moved together with the laser head in Y direction forming a gantry.
[11] a work area is enclosed by the total clamping mechanism monitoring the entire blanks assembly and the direct clamping mechanism monitoring weld joints at a close distance from the weld point to meet the metal fit-up requirement.
[12] The said total clamping mechanism is made up of a front pressing beams, a rear pressing beams and a pressing wheel; the front and rear pressing beams, respectively placing two sides of the slipway, connects to driven air cylinders for driving up and down; at least two pressing wheels are respectively mounted on the front and rear pressing beam.
[13] The said direct clamping mechanism is made up of the laser head, a left pressing roller and a right pressing roller; the left and right pressing rollers connecting to driven air cylinders are disposed on the two sides of the laser head by means of the bed fixing pedestal; the laser head is mounted on the slipway moving together with the left pressing roller and the right pressing roller.
[14] The said left and right pressing rollers disposed on the two sides of the laser head are mounted on the bed fixing pedestal by a movable mechanism. The driven air cylinders have a pressure valve. The said laser head which can be moved in X, Y and Z directions is mounted on the slipway by movable mechanism in X, Y directions Advantageous Effects
[15] 1. It has a good welding quality. The pressing rollers and pressing wheels provided by the present invention can move down to the welding blanks; the total clamping mechanism monitors the entire blanks assembly and the direct clamping mechanism which clamps at a close distance from the weld point monitors the weld joints to have a good welding quality.
[16] 2. It is a device for blanks with different thickness. Each air cylinder having a pressure valve can adjust the clamping force for the pressing rollers and pressing wheels to the blanks with different thickness to meet the welding requirements of flatness of sheets and minimum gas in between.
[17] 3. This apparatus with simple structure and convenient operation characters can work in a stable and reliable status. Description of Drawings
[18] FIG. 1 is a structural diagram of the invention
[19] FIG. 2 is the top view of the clamping device
[20] Here, 1 is the laser head, 2 is the slipway in Y direction, 3 is the first press roller, 4 is the right air cylinder, 5 is the bed fixing pedestal, 6 is the left press roller, 7 is the second air cylinder, 8 is the third press beam, 9 is the front air cylinder, 10 is the forth press beam, 11 is the rear air cylinder, 12 and 13 are the steel blanks and 14 is the pressing wheels. Mode for Invention
[21] The invention will be further described in detail with reference to drawings attached.
[22] According to Fig. 1 and Fig. 2, this invention includes:
[23] the slipway 2, moving in Y direction;
[24] the laser head 1, mounted on the slipway 2 by means of the bed fixing pedestal 5;
[25] the total clamping mechanism, placed over the workbench being parallel to Y directions and perpendicular to the slipway2, which can be moved up and down;
[26] the direct clamping mechanism, mounted on the slipway 1 by means of the bed fixing pedestal5 located in X direction being moved together with the laser head 1 in Y direction(length of sheets ) forming a gantry.
[27] The work area is enclosed by the total clamping mechanism monitoring the entire blanks assembly and the direct clamping mechanism monitoring weld joints at a close distance from the weld point to meet the metal fit-up requirement.
[28] Wherein, the total clamping mechanism is made up of the front pressing beams 8, rear pressing beams 10 and the pressing wheels 14; The front and rear pressing beams 8 and 10 respectively placing two sides of the slipway 2, are connected to the third air cylinder 9 and the forth cylinder 11 respectively which can drive the pressing beam up and down; there are at least two pressing wheels 14 (the present invention has 6 x 2 wheels) on the front pressing beams 8 and rear pressing beams 10 respectively; Each of the third air cylinder 9 and the forth cylinder 11 has a pressure valve (the present invention use high-speed valve) which is used to adjust the clamping force of the pressing wheels 14 to control the flatness of the blanks.
[29] The direct clamping mechanism is made up of the laser head 1, the left pressing roller 6 and the right pressing roller 3; the left and right pressing rollers 6, 3 connecting to the second air cylinder 7 and the first air cylinder 4 are disposed on the two sides of the laser head 1 by means of the bed fixing pedestal 5; the laser head 1, the left pressing roller 6 and the right pressing roller 3 are mounted on the slipway 2; Each of the second air cylinder 7 and the first air cylinder 4 has a pressure valve(the present invention use high-speed valve ) which is used to adjust the clamping force of the pressing rollers 3, 6 to control the flatness of the blanks.
[30] The laser head 1 is mounted on the slipway 2 by movable mechanism in X, Y directions which can be moved in X, Y and Z directions; the laser head 1 moves in Y directions together with the left and right pressing roller 6, 3 driven by slipway 2; the laser head 1 laid between the left and right pressing roller 6, 3 moves in X, Y and Z directions as reciprocating motion; during the welding process, the total clamping mechanism monitors the deformations of the blanks in the entire working area and moves together with the laser head 1 in Y direction clamps at a close distance from the weld point, which guarantees the welding quality.
[31 ] Working principle of the invention:
[32] The blanks (or sheets) 12, 13 are overlapped on the workbench. Before stitch welding, the third air cylinder 9 drives the front pressing beam 8 down until the pressing wheels 14 on the beam presses the blanks 12, 13, and the forth air cylinder 11 drives the front pressing beam 10 down until the pressing wheels 14 on the beam presses the blanks 12, 13 before welding; the second air cylinder 7 drives the left pressing roller 6 down to the blanks 12, 13 and the first air cylinder 4 drives the right pressing roller 3 down to the blanks 12, 13; The work area is enclosed by the left and right pressing roller 6, 3, and the pressing wheels 14 on the pressing beam, when stitch welding, the laser head moves in X, Y and Z directions shown in Fig.l and Fig. 2; when finishing the welding in the working area, the next area is driven into the welding area in X direction, during this process, the pressing wheels 14 keep clamping to make the blanks smooth, the total clamping mechanism monitors the deformations of the blanks in the entire working area, and the direct clamping mechanism guarantees the gap and flatness near the weld point, which leads to a good welding quality.

Claims

Claims
[1] A apparatus of laser stitch welding for large scale sheets, characterized in that: a slipway (2), moving in Y direction; a laser head (1), mounted on the slipway (2) by means of a bed fixing pedestal
(5); a total clamping mechanism, placed over a workbench being parallel to Y direction and perpendicular to the slipway (2), which can be moved up and down; a direct clamping mechanism, mounted on the slipway(l) by means of the bed fixing pedestal (5) located in X directions being moved together with the laser head (1) in Y direction forming a gantry; a work area is enclosed by the total clamping mechanism monitoring the entire blanks assembly and the direct clamping mechanism monitoring weld joints at a close distance from the weld point to meet the metal fit-up requirement.
[2] The apparatus of laser stitch welding for large scale sheets according to the claim
1, characterized in that the said total clamping mechanism is made up of a front pressing beams (8), a rear pressing beams (10) and a pressing wheel (14); the front and rear pressing beams (8, 10), respectively placing two sides of the slipway (2), connects driven air cylinders for driving up and down; at least two pressing wheels (14) are respectively mounted on the front and rear pressing beam (8, 10).
[3] The apparatus of laser stitch welding for large scale sheets according to the claim
1, characterized in that the said direct clamping mechanism is made up of the laser head (1), a left pressing roller (6) and a right pressing roller (3); the left and right pressing rollers (6, 3) connecting to driven air cylinders are disposed on the two sides of the laser head (1) by means of the bed fixing pedestal (5); the laser head (1) is mounted on the slipway (2) moving together with the left pressing roller (6) and the right pressing roller (3).
[4] The apparatus of laser stitch welding for large scale sheets according to the claim
3, characterized in that the said left and right pressing rollers (6, 3) disposed on the two sides of the laser head (1) is mounted on the bed fixing pedestal (5) by a movable mechanism.
[5] The apparatus of laser stitch welding for large scale sheets according to the claim
2 and 3, characterized in that the driven air cylinders have a pressure valve.
[6] The apparatus of laser stitch welding for large scale sheets according to the claim
1, characterized in that the said laser head (1) is mounted on the slipway (2) by movable mechanism in X, Y directions which can be moved in X, Y and Z directions.
PCT/CN2008/071638 2007-08-29 2008-07-14 Apparatus of laser stitch welding for large scale sheets WO2009026808A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710012627.9 2007-08-29
CN2007100126279A CN101376195B (en) 2007-08-29 2007-08-29 Compressing apparatus for laser beam welding

Publications (1)

Publication Number Publication Date
WO2009026808A1 true WO2009026808A1 (en) 2009-03-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (2)

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CN (1) CN101376195B (en)
WO (1) WO2009026808A1 (en)

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WO2014080053A1 (en) * 2012-11-21 2014-05-30 Manuel Ruiz Carmona Appliance for joining a sheet-type body to the mouth of a box
CN104759798A (en) * 2015-04-16 2015-07-08 中船黄埔文冲船舶有限公司 Welding stress frame used for light enclosure wall structure of vessel
US9168610B2 (en) 2011-10-13 2015-10-27 Hyundai Motor Company Laser apparatus for welding
CN108526782A (en) * 2018-03-15 2018-09-14 湖北理工学院 A kind of Full-automatic welding tooling that downhand welding and vertical position welding can be achieved at the same time
CN112643196A (en) * 2020-09-02 2021-04-13 广东省鑫全利激光智能装备有限公司 Aluminum plate laser welding equipment

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US9168610B2 (en) 2011-10-13 2015-10-27 Hyundai Motor Company Laser apparatus for welding
US9592571B2 (en) 2011-10-13 2017-03-14 Hyundai Motor Company Laser apparatus for welding
WO2014080053A1 (en) * 2012-11-21 2014-05-30 Manuel Ruiz Carmona Appliance for joining a sheet-type body to the mouth of a box
CN104759798A (en) * 2015-04-16 2015-07-08 中船黄埔文冲船舶有限公司 Welding stress frame used for light enclosure wall structure of vessel
CN108526782A (en) * 2018-03-15 2018-09-14 湖北理工学院 A kind of Full-automatic welding tooling that downhand welding and vertical position welding can be achieved at the same time
CN112643196A (en) * 2020-09-02 2021-04-13 广东省鑫全利激光智能装备有限公司 Aluminum plate laser welding equipment

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Publication number Publication date
CN101376195A (en) 2009-03-04
CN101376195B (en) 2010-08-25

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