CN105328340B - A kind of optical-fiber laser welding method of LCD bracket - Google Patents
A kind of optical-fiber laser welding method of LCD bracket Download PDFInfo
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- CN105328340B CN105328340B CN201510739349.1A CN201510739349A CN105328340B CN 105328340 B CN105328340 B CN 105328340B CN 201510739349 A CN201510739349 A CN 201510739349A CN 105328340 B CN105328340 B CN 105328340B
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- 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
-
- 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
- B23K26/0823—Devices involving rotation of 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- 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
- B23K37/0443—Jigs
-
- 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
- B23K2101/24—Frameworks
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to LCD bracket welding shaping method, the method particularly relating to use advanced optical-fiber laser welded liquid crystal display bracket.Comprise the following steps: three sections of square tubes of composition support are positioned on automatic fixture, dock three sections of square tubes；Adjust the arrival predeterminated position of optical-fiber laser plumb joint, the weld seam in first welding support front, after completing welding, automatic fixture is driven to rotate 180 °, the weld seam at the welding support back side again, technological parameter is: optical-fiber laser is continuous wave, wavelength 1064nm, laser power 500 ~ 1000W, speed of welding 15 ~ 25 mm s when welding cross joint and downhand weld‑1, laser power 500 ~ 900W, speed of welding 15 ~ 25 mm s during welding angle welding‑1.It is an advantage of the current invention that compared with traditional welding method, LCD bracket laser welding defect rate is extremely low, the Automatic laser welding volume production of display bracket is achieved, both ensure that welding quality, improve enterprises production efficiency, reduce again the production cost of single workpiece simultaneously.
Description
Technical field
The present invention relates to LCD bracket welding shaping method, the method particularly relating to use advanced optical-fiber laser welded liquid crystal display bracket.
Background technology
LCD bracket, can help to solve the multiple technologies difficult problem that people are run into when family or industry and commerce office space operating computer, use ergonomic designs, the health problem can brought with prevention work fatigue, improve work efficiency, bringing the ideal space of live and work, be the most extensively incorporated in the fields such as retail, amusement, finance, medical treatment, traffic, product contains the categories such as single-screen, double screen, large format Mosaic screen.
The traditional welding method of LCD bracket is to use TIG weldering, and the method efficiency is low, heat affected area big, and sweating heat deformation is big, and the easy burn-through of support corner, defect rate is high, additionally during TIG weld, molten pool metal can be polluted by tungsten bar so that welding product can not export.
Laser welding is the laser beam the utilizing high-energy-density efficient high-accuracy welding method of one as thermal source.Laser welding is one of important application of Materialbearbeitung mit Laserlicht technology.20 century 70s are mainly used in welding thin-walled material and low speed welding, welding process belongs to heat-conduction-type, i.e. laser emission heated parts surface, surface heat is internally spread by conduction of heat, by controlling the parameters such as the width of laser pulse, energy, peak power and repetition rate, make workpiece melt, form specific molten bath.Due to the advantage of its uniqueness, it is successfully applied in the precision welding of micro-, miniature parts.Laser welding can use continuously or pulse laser beam is realized, and the principle of laser welding can be divided into heat-conduction-type welding and penetration fustion welding.Power density is less than 104~105
W/cm2For heat conduction welding, now fusion penetration is shallow, speed of welding is slow；Power density is more than 105~107W/cm2Time, metal surface, by the recessed one-tenth of heat effect " aperture ", forms deep penetration welding, has the advantages that speed of welding is fast, depth-to-width ratio is big.
Summary of the invention
The present invention is to solve the deficiency that above-mentioned welding method exists, provide a kind of LCD bracket optical-fiber laser welding method, the method is with YLS-1000 optical fiber laser as thermal source, with the ABB artificial carrier of IRB2600 industrial machine, both improve the production efficiency of automatization, in turn ensure that welding quality.
The present invention is achieved through the following technical solutions.
The present invention is the optical-fiber laser welding method of a kind of LCD bracket, it is characterised in that comprise the following steps:
A, by composition support three sections of square tubes be positioned on automatic fixture, dock three sections of square tubes, during docking, ensure that interface is close to, three sections of square tubes do not have relative dislocation；
B, adjust optical-fiber laser plumb joint and arrive predeterminated position, launch laser beam irradiation and be blown into protective gas to pad while on weld seam, the cross joint one in first welding support front, angle welding one, downhand weld one and angle welding two, weld cross joint two again, angle welding three, downhand weld two and angle welding four, after completing welding, automatic fixture is driven to rotate 180 °, the cross joint three at the first welding support back side, angle welding five, downhand weld three and angle welding six, weld cross joint four again, angle welding seven, downhand weld four and angle welding eight, optical fiber laser is closed after completing welding, technological parameter is: optical-fiber laser is continuous wave, wavelength 1064nm, laser power 500 ~ 1000W when welding cross joint and downhand weld, speed of welding 15 ~ 25
mm·s-1, weld laser power 500 ~ 900W during angle welding, speed of welding 15 ~ 25
mm·s-1。
Preferably, the material that above-mentioned square tube uses is Q195 carbon structural steels, more than pipe thickness 1.5mm, the blanking of square tube uses the method molding of line cutting, interface is smooth does not has burr, three sections of square tube docking, middle one section short square tube horizontal positioned, the square tube of other two segment lengths tilts 10 ° of both sides being symmetrically distributed in short square tube.
Preferably, the butt seam of above-mentioned three sections of square tubes is less than 0.3mm.
Preferably, above-mentioned technological parameter is: optical-fiber laser is continuous wave, and wavelength is 1064nm, laser power 1000W when welding cross joint and downhand weld, speed of welding 20 mm s-1, weld laser power 900W during angle welding, speed of welding 15 mm s-1。
Preferably, the speed of welding that the arcing point of above-mentioned angle welding and cross joint or downhand weld overlap at 2 ~ 3mm, and angle welding is bigger than cross joint and downhand weld, and laser power is low.
Preferably, in above-mentioned steps B, cross joint, angle welding, downhand weld and the welding of four continuous welds of angle welding on interface same for support front or the back side, first by the lowest positions of the position adjustment of optical-fiber laser plumb joint to cross joint, laser beam irradiation uses the method for vertical-up welding first to complete the welding of cross joint from bottom to top, then rotary laser plumb joint rotates the welding being sequentially completed angle welding, downhand weld and angle welding around this interface, and during welding, laser beam to keep vertical with the angle of weld seam.
Preferably, the welding of cross joint, angle welding, downhand weld and four continuous welds of angle welding on the same interface in above-mentioned support front or the back side is disposably completed welding by optical-fiber laser plumb joint continuous firing.
Preferably, stating protective gas is argon, and gas flow speed is 20L min-1。
Preferably, state optical-fiber laser plumb joint and carried by robot arm, can move freely in all directions, rotate.
Preferably, before butt welded seam welds, described method also includes the step that the foul near by weld seam 50mm and greasy dirt clean up.
It is an advantage of the current invention that compared with traditional welding method, LCD bracket laser welding defect rate is extremely low, the Automatic laser welding volume production of display bracket is achieved, both ensure that welding quality, improve enterprises production efficiency, reduce again the production cost of single workpiece simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of support square tube fillet in normal shear of the present invention.
Fig. 2 is the structural representation of support square tube sealing run of the present invention.
Wherein:
1, cross joint one, 2, angle welding one, 3, downhand weld one, 4, angle welding two, 5, cross joint two, 6, angle welding three, 7, downhand weld two, 8, angle welding four, 9, cross joint three, 10, angle welding five, 11, downhand weld three, 12, angle welding six, 13, cross joint four, 14, angle welding seven, 15, downhand weld four, 16, angle welding eight.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
As shown in Figure 1, support is made up of three sections of square tubes, its material preferred Q195 carbon structural steels, more than pipe thickness 1.5mm, the blanking of square tube uses the method molding of line cutting, and interface is smooth does not has burr, preferably ensure that the gap of commissure is less than 0.3mm, three sections of square tube docking, middle one section short square tube horizontal positioned, the square tube of other two segment lengths tilts 10 ° of both sides being symmetrically distributed in short square tube.Preferably use alcohol washes clean greasy dirt at 50mm around weld seam before welding, so can reduce its reflection to laser, increase the workpiece absorbance to light, increase fusion penetration and ensure welding quality.
In the present embodiment, with IPG YLS-1000 optical fiber laser as welding heat source, water chiller IPG
nullLaser GmbH Siemensstrasse7 is chiller，Optical-fiber laser plumb joint is carried with the robot arm of ABB IRB 2600 robot，First by the lowest positions of the cross joint 1 of the position adjustment of optical-fiber laser plumb joint to support front，Launch laser beam irradiation and be blown into protective gas to pad while on weld seam，Use argon not oxidized as protective gas protection weld seam at this，Laser beam irradiation uses the method for vertical-up welding first to complete the cross joint 1 in welding support front from bottom to top，Then driven machine human arm rapid rotary laser plumb joint rotates around this interface and is sequentially completed angle welding 1、Downhand weld 1 and the welding of angle welding 24，Then according to above-mentioned method，It is sequentially completed cross joint 25、Angle welding 36、Downhand weld 27 and the welding of angle welding 48，During welding, laser beam to keep vertical with the angle of weld seam.
As shown in Figure 2, after completing above-mentioned welding, automatic fixture is driven to rotate 180 °, use the cross joint 39 at the said method elder generation welding support back side, angle welding 5 10, downhand weld 3 11 and angle welding 6 12, weld cross joint 4 13, angle welding 7 14, downhand weld 4 15 and angle welding 8 16 again, after completing welding, close optical fiber laser.
As improving further, in said method step, the arcing point of angle welding and cross joint or downhand weld overlap joint 2 ~ 3mm, and the speed of welding at angle welding is bigger than cross joint and downhand weld, laser power is low, preferably, the welding of the cross joint of same interface, angle welding, downhand weld and four weld seams of angle welding is preferably disposably completed welding by optical-fiber laser plumb joint continuous firing.
The optimizing technology parameters of above method is: optical-fiber laser is continuous wave, and wavelength is 1064nm, laser power 1000W when welding cross joint and downhand weld, speed of welding 20 mm s-1, weld laser power 900W during angle welding, speed of welding 15 mm s-1。
Below, different laser powers is selected to weld, the weld penetration of welding parameter that cross joint and downhand weld specifically use and the support square tube that welding obtains is as shown in Table 1, the weld penetration of welding parameter that angle welding specifically uses and the support square tube that welding obtains is as shown in Table 2, as shown in Table 3, the optimal welding condition of LCD bracket angle welding is as shown in Table 4 for LCD bracket cross joint and the optimal welding condition of downhand weld.
Table one cross joint and downhand weld technological parameter
| Pipe thickness/mm | Laser power/W | Speed of welding/mm s-1 | Spot diameter/mm | Gas flow/L min-1 | Protection gas | Fusion penetration/mm |
| 1.5 | 500 | 15 | 0.3 | 20 | Ar | 0.7 |
| 1.5 | 600 | 20 | 0.3 | 20 | Ar | 0.8 |
| 1.5 | 700 | 25 | 0.3 | 20 | Ar | 0.8 |
| 1.5 | 800 | 20 | 0.3 | 20 | Ar | 0.7 |
| 1.5 | 900 | 20 | 0.3 | 20 | Ar | 1.1 |
| 1.5 | 1000 | 20 | 0.3 | 20 | Ar | 1.5 |
Table two angle welding fusion penetration technological parameter
| Pipe thickness/mm | Laser power/W | Speed of welding/mm s-1 | Spot diameter/mm | Gas flow/L min-1 | Protection gas | Fusion penetration/mm |
| 1.5 | 500 | 15 | 0.3 | 20 | Ar | 0.8 |
| 1.5 | 600 | 20 | 0.3 | 20 | Ar | 0.9 |
| 1.5 | 700 | 25 | 0.3 | 20 | Ar | 0.9 |
| 1.5 | 800 | 15 | 0.3 | 20 | Ar | 1.2 |
| 1.5 | 900 | 15 | 0.3 | 20 | Ar | 1.5 |
| 1.5 | 1000 | 15 | 0.3 | 20 | Ar | Burn |
Table three cross joint peace weld penetration optimal processing parameter
| Pipe thickness/mm | Laser power/W | Speed of welding/mm s-1 | Spot diameter/mm | Gas flow/L min-1 | Protection gas | Fusion penetration/mm |
| 1.5 | 1000 | 20 | 0.3 | 20 | Ar | 1.5 |
Table corner weld penetration optimal processing parameter
| Pipe thickness/mm | Laser power/W | Speed of welding/mm s-1 | Spot diameter/mm | Gas flow/L min-1 | Protection gas | Fusion penetration/mm |
| 1.5 | 900 | 15 | 0.3 | 20 | Ar | 1.5 |
By table three and table four it can be seen that the complete penetration under optimal processing parameter of support square tube, and heat affected area is the least, dense structure, and intensity fully meets requirement.Optical-fiber laser welding be a kind of efficiently, pollute the welding manner of little novel high added value, while increasing industrial automation ability, decrease the pollution to environment.
The embodiment of invention described above, is not intended that limiting the scope of the present invention.Any amendment, equivalent and improvement etc. done within the spiritual principles of the present invention, within should be included in the claims of the present invention.
Claims (10)
1. the optical-fiber laser welding method of a LCD bracket, it is characterised in that comprise the following steps:
A, by composition support three sections of square tubes be positioned on automatic fixture, dock three sections of square tubes, during docking, ensure that interface is close to, three sections of square tubes do not have relative dislocation；
B, adjust optical-fiber laser plumb joint and arrive predeterminated position, launch laser beam irradiation and be blown into protective gas to pad while on weld seam, the cross joint one in first welding support front, angle welding one, downhand weld one and angle welding two, weld cross joint two again, angle welding three, downhand weld two and angle welding four, after completing welding, automatic fixture is driven to rotate 180 °, the cross joint three at the first welding support back side, angle welding five, downhand weld three and angle welding six, weld cross joint four again, angle welding seven, downhand weld four and angle welding eight, optical fiber laser is closed after completing welding, technological parameter is: optical-fiber laser is continuous wave, wavelength 1064nm, laser power 500 ~ 1000W when welding cross joint and downhand weld, speed of welding 15 ~ 25 mm s-1, laser power 500 ~ 900W, speed of welding 15 ~ 25 mm s during welding angle welding-1。
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterized in that, the material that described square tube uses is Q195 carbon structural steels, more than pipe thickness 1.5mm, the blanking of square tube uses the method molding of line cutting, and interface is smooth does not has burr, three sections of square tube docking, middle one section short square tube horizontal positioned, the square tube of other two segment lengths tilts 10 ° of both sides being symmetrically distributed in short square tube.
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterised in that the butt seam of described three sections of square tubes is less than 0.3mm.
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterized in that, described technological parameter is: optical-fiber laser is continuous wave, and wavelength is 1064nm, laser power 1000W when welding cross joint and downhand weld, speed of welding 20 mm s-1, weld laser power 900W during angle welding, speed of welding 15 mm s-1。
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterized in that, the speed of welding that the arcing point of described angle welding and cross joint or downhand weld overlap at 2 ~ 3mm, and angle welding is bigger than cross joint and downhand weld, and laser power is low.
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterized in that, in described step B, cross joint on interface same for support front or the back side, angle welding, downhand weld and the welding of four continuous welds of angle welding, first by the lowest positions of the position adjustment of optical-fiber laser plumb joint to cross joint, laser beam irradiation uses the method for vertical-up welding first to complete the welding of cross joint from bottom to top, then rotary laser plumb joint rotates around this interface and is sequentially completed angle welding, downhand weld and the welding of angle welding, during welding, laser beam to keep vertical with the angle of weld seam.
The optical-fiber laser welding method of LCD bracket the most according to claim 6, it is characterized in that, the welding of cross joint, angle welding, downhand weld and four continuous welds of angle welding on the same interface in described support front or the back side is disposably completed welding by optical-fiber laser plumb joint continuous firing.
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterised in that described protective gas is argon, gas flow speed is 20L min-1。
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterised in that described optical-fiber laser plumb joint is carried by robot arm, can move freely, rotates in all directions.
The optical-fiber laser welding method of LCD bracket the most according to claim 1, it is characterised in that before butt welded seam welds, described method also includes the step that the foul near by weld seam 50mm and greasy dirt clean up.
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| CN201510739349.1A CN105328340B (en) | 2015-11-04 | 2015-11-04 | A kind of optical-fiber laser welding method of LCD bracket |
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| CN201510739349.1A CN105328340B (en) | 2015-11-04 | 2015-11-04 | A kind of optical-fiber laser welding method of LCD bracket |
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| CN111038819A (en) * | 2019-12-23 | 2020-04-21 | 陕西仕卓金属制品有限公司 | Packing box and welding method thereof |
| CN112846461B (en) * | 2021-02-19 | 2022-07-29 | 鞍钢集团北京研究院有限公司 | Welding method of polygonal structural member |
| CN112756839B (en) * | 2021-03-04 | 2022-03-08 | 焦作智造机电设备有限公司 | Method for realizing programming-free automatic welding of straight pipe fitting through visual image tracing |
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| US5190207A (en) * | 1992-06-02 | 1993-03-02 | Deere & Company | Method for welding rectangular tubes |
| JPH11169945A (en) * | 1997-12-08 | 1999-06-29 | Kawasaki Steel Corp | Production of laser beam welded steel tube |
| JP2000006869A (en) * | 1998-06-18 | 2000-01-11 | Honda Motor Co Ltd | Connecting pipe frame |
| DE29818579U1 (en) * | 1998-10-17 | 1998-12-17 | Arbonia Ag, Arbon | Radiator, with at least two flat tubes on top of each other |
| CN102990265B (en) * | 2012-11-23 | 2015-01-21 | 中国航空工业集团公司北京航空制造工程研究所 | Welding method and clamp of Venturi tube with bend |
| CN103192149B (en) * | 2013-04-07 | 2015-10-28 | 常州大学 | The welding method of X80 pipe line steel laser braze welding |
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