CN110842359A - Metal sheet is along with welding gaseous self-adaptation cooling type laser welding device - Google Patents
Metal sheet is along with welding gaseous self-adaptation cooling type laser welding device Download PDFInfo
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- CN110842359A CN110842359A CN201911054096.9A CN201911054096A CN110842359A CN 110842359 A CN110842359 A CN 110842359A CN 201911054096 A CN201911054096 A CN 201911054096A CN 110842359 A CN110842359 A CN 110842359A
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- welding
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- air conditioner
- shielding gas
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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
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/703—Cooling arrangements
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to laser welding equipment, in particular to a gas-adaptive cooling type laser welding device for a metal sheet along with welding. It includes gas flow governing system, air conditioner, cold air duct, protection air gun, connecting device and laser head, gas flow governing system includes temperature sensor and controller, temperature sensor sets up and gathers the temperature parameter on the welding workpiece, controller signal input part connects in temperature sensor signal output part, the signal output part of controller connect in the signal input part of air conditioner, the air conditioner with the protection air gun is connected, the air conditioner discharges through liquid nitrogen cooling's argon gas and passes through the cold air duct carries extremely the protection air gun, the protection air gun passes through connecting device is connected with the laser head. The device can carry out self-adaptive adjustment to the flow velocity of the gas along with welding according to the temperature of the workpiece to be welded, is favorable for reducing welding deformation, is light, small, simple and convenient, has strong adjustability and has the characteristic of low manufacturing cost of equipment.
Description
Technical Field
The invention belongs to the field of laser welding equipment, and particularly relates to a metal sheet welding-following gas self-adaptive cooling type laser welding device.
Background
The laser welding technology has the advantages of high speed, strong penetrability, high precision and the like, can greatly improve the welding efficiency and the welding quality, and is widely applied to advanced manufacturing industries of airplanes, automobiles, navigation equipment and the like in recent years.
The laser head uses high-energy laser pulses to locally heat the material in a micro area, the energy of laser radiation is diffused to the interior of the material through heat conduction, and the material is melted to form a specific molten pool. Due to the high temperature of the laser, the laser head is often in an overheating state, and the laser head needs to be cooled. Also for welded workpieces, cooling treatment is often required in order to enable the workpieces to be cooled rapidly. The sample is lack of multi-azimuth location fixed in laser welding experimental process, and the release of the residual stress that the laser welding produced leads to welding connection spare distortion serious, and welding size precision is difficult to control.
At present, a cooling system of laser welding equipment cannot adaptively adjust the cooling capacity according to the temperature of a workpiece, the post-welding cooling implementation process is complex, the consumption is huge, the processing efficiency is low, and the welding deformation is difficult to effectively control.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, adapt to practical requirements, and provide a metal sheet welding-following gas self-adaptive cooling type laser welding device, which solves the problem of serious distortion after welding and can self-adaptively adjust the flow speed of welding-following gas according to the surface temperature of a welded workpiece.
Sheet metal is along with welding gas self-adaptation cooling type laser welding device, it is by the air conditioner, the cold air duct, the shielding gas rifle, the laser head, connecting device and gas flow control system constitute, wherein gas flow control system includes controller and temperature sensor, temperature sensor sets up the collection temperature parameter on the welding work piece, controller signal input part is connected in temperature sensor signal output part, the signal output part of controller is connected in the signal input part of air conditioner, the air conditioner passes through the cold air duct and is connected with the shielding gas rifle, the air conditioner discharges through the argon gas of liquid nitrogen cooling and passes through the cold air duct and carry to the shielding gas rifle, the shielding gas rifle passes through connecting device and is connected with the laser head.
The connecting device comprises an arc-shaped sliding rail, a clamping sleeve and a connecting plate, the connecting plate is fixed on the left side of the laser head shell through a bolt, and the arc-shaped sliding rail and the clamping sleeve are fixed on the connecting plate.
The controller adjusts the air supply speed of the air conditioner according to the acquired temperature parameters.
The temperature sensors are annularly distributed on the surface of the workpiece to be welded, are respectively positioned on the left side and the right side of the workpiece to be welded, and are positioned on the left side, the right side and one side of a welding line, and are two as shown in figure 2.
The protection air gun is connected with the connecting plate through the jacket, the protection air gun can rotate around the vertical direction, and the rotating range is within 30 degrees of an included angle with the vertical direction.
The invention has the beneficial effects
1. The invention provides a metal sheet welding gas self-adaptive cooling type laser welding device, which cools shielding gas by liquid nitrogen, moves a shielding gas gun along with a laser head, has a more targeted cooling effect and improves the working efficiency.
2. Aiming at the problem that the cooling quantity can not be adaptively adjusted according to the temperature of a workpiece in the prior art, the invention uses a welding-following gas flow adjusting device, a sensor detects the temperature parameter of the workpiece to be processed and feeds the temperature parameter back to a controller, and the controller controls the air feeding speed of an air conditioner according to the temperature parameter to perform adaptive temperature adjustment, thereby achieving the effect of controlling welding deformation in real time.
Drawings
Fig. 1 is a schematic structural diagram of a laser welding device of a metal sheet self-adaptive cooling type along with welding gas.
FIG. 2 is a schematic diagram of a temperature sensor arrangement for a workpiece to be welded.
In the figure: 1. the welding machine comprises a controller, 2 parts of an air conditioner, 3 parts of an air cooling pipe, 4 parts of an air protection machine, 5 parts of an arc-shaped sliding rail, 6 parts of a jacket, 7 parts of a connecting plate, 8 parts of a laser head, 9 parts of a temperature sensor and 10 parts of a workpiece to be welded.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The laser welding device for the domestic novel SPCC cold-rolled carbon steel 1.5mm sheet is shown in figure 1 and comprises the following components: air conditioner 2, cold-air duct 3, protection air gun 4, laser head 8, connecting device and gas flow governing system, wherein gas flow governing system includes controller 1 and temperature sensor 9, temperature sensor 9 sets up and gathers the temperature parameter on welding workpiece 10, controller 1 signal input part connects in temperature sensor 9 signal output part, controller 1's signal output part connects in the signal input part of air conditioner 2, air conditioner 2 passes through cold-air duct 3 with protection air gun 4 and is connected, air conditioner 2 discharges through liquid nitrogen cooling's argon gas and passes through cold-air duct 3 and carry to protection air gun 4, protection air gun 4 passes through connecting device and is connected with laser head 8, wherein connecting device includes arc slide rail 5, press from both sides cover 6 and connecting plate 7, connecting plate 7 passes through the bolt fastening on the left side of laser head 8 shell, arc slide rail 5 and clamp cover 6 are fixed in the connecting plate.
The working parameters are as follows: the laser welding power is 3000W, the defocusing amount is +1mm, the corresponding spot diameter is 1.5mm, and the initial protective gas velocity is 5L/mm.
The shielding gas used in the specific embodiment is argon, the air hole of the shielding gas gun 4 is set to be cylindrical, and the symmetrical axis of the cylindrical air hole is against the forming direction of the welding seam and forms an included angle of 45 degrees with the vertical direction.
In the specific embodiment, the protective air gun is adjusted to normally blow out argon, the space positions of the laser head and the protective air gun are adjusted according to the actual requirements of protecting and cooling the weld joint, so that the protective air gun is aligned to weld joint metal at the rear part of a molten pool, and the distance from a light spot is 3 mm.
In the actual welding process, the continuous heat input of the laser welding causes the cooling speed of the welding seam to be changed continuously. Therefore, the temperature sensor 9 is arranged to monitor the welding seam temperature and the joint temperature of the high-temperature creep area in real time, and feed back the monitoring result to the controller 1 to regulate and control the power of the air cooler and the flow of the protective gas in real time, so that the welding deformation is reduced.
In a specific embodiment, as shown in fig. 2, the temperature of the front end of a welding molten pool and the temperature of a high-temperature creep zone at the rear end are respectively monitored in real time according to a left temperature sensor and a right temperature sensor which are positioned on a workpiece to be welded, the position of a shielding gas gun and the shielding gas speed are adjusted in real time by comparing the difference value with an original set value, when the temperature of the front end of the molten pool is higher, the shielding gas speed is properly increased, the power of an air conditioner is increased, and otherwise, the shielding gas speed is properly reduced; when the temperature of the rear-end high-temperature creep zone is lower, the speed of the shielding gas is properly reduced, the distance between the gas outlet hole of the shielding gas gun and the welding position is reduced, and otherwise, the distance is properly increased.
The adjusting range of the speed of the protective gas is 0.6-1.2 times of the speed of the initial welding gas, and the adjusting range of the distance between the protective gas gun and the light spot is 0.6-1.2 times of the initial welding distance.
Claims (5)
1. Sheet metal is along with welding gaseous self-adaptation cooling type laser welding device, a serial communication port, it is by the air conditioner, the cold air duct, the shielding gas rifle, the laser head, connecting device and gas flow control system constitute, wherein gas flow control system includes controller and temperature sensor, temperature sensor sets up the collection temperature parameter on the welding work piece, controller signal input part connects in temperature sensor signal output part, the signal output part of controller connects in the signal input part of air conditioner, the air conditioner passes through the cold air duct and is connected with the shielding gas rifle, the air conditioner discharges through the argon gas of liquid nitrogen cooling and passes through the cold air duct and carry to the shielding gas rifle, the shielding gas rifle passes through connecting device and is connected with the laser head.
2. The welding gas adaptive cooling type laser welding device for the metal sheets according to claim 1, wherein the connecting device comprises an arc-shaped sliding rail, a jacket and a connecting plate, the connecting plate is fixed on the left side of the laser head shell through bolts, and the arc-shaped sliding rail and the jacket are fixed on the connecting plate; the protection air gun is connected with the connecting plate through the jacket, the protection air gun can rotate around the vertical direction, and the rotating range is within 30 degrees of an included angle with the vertical direction.
3. The apparatus of claim 1 wherein the controller adjusts the delivery rate of the air conditioner based on the sensed temperature parameter.
4. The welding gas adaptive cooling type laser welding device for the metal sheets according to claim 1, wherein the temperature sensors are annularly distributed on the surfaces of the workpieces to be welded, are respectively positioned on the left side and the right side of the workpieces to be welded, and are positioned on the left side and the right side of a welding line, and are positioned on one side.
5. The welding gas adaptive cooling type laser welding device for the metal sheets according to claim 1, wherein the temperature of the front end of the welding molten pool and the temperature of the high-temperature creep zone at the rear end are respectively monitored in real time according to a left temperature sensor and a right temperature sensor which are positioned on a workpiece to be welded, the position of a shielding gas gun and the shielding gas speed are adjusted in real time by comparing the difference with an original set value, when the temperature of the front end of the molten pool is higher, the shielding gas speed is properly increased, the power of a cold air machine is increased, and otherwise, the shielding gas speed is properly decreased; when the temperature of the rear-end high-temperature creep zone is lower, the speed of the shielding gas is properly reduced, the distance between the gas outlet hole of the shielding gas gun and the welding position is reduced, and otherwise, the distance is properly increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911054096.9A CN110842359A (en) | 2019-10-31 | 2019-10-31 | Metal sheet is along with welding gaseous self-adaptation cooling type laser welding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911054096.9A CN110842359A (en) | 2019-10-31 | 2019-10-31 | Metal sheet is along with welding gaseous self-adaptation cooling type laser welding device |
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| CN110842359A true CN110842359A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911054096.9A Withdrawn CN110842359A (en) | 2019-10-31 | 2019-10-31 | Metal sheet is along with welding gaseous self-adaptation cooling type laser welding device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922519A (en) * | 2020-08-10 | 2020-11-13 | 西安建筑科技大学 | Laser welding device |
| CN113547215A (en) * | 2021-08-23 | 2021-10-26 | 上海交通大学 | Welding device for strengthening and toughening ultrahigh-strength steel welding joint based on self-distribution |
| CN115555745A (en) * | 2022-07-12 | 2023-01-03 | 杨志尧 | Real-time temperature and shape control equipment for thick plate laser welding |
Citations (7)
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| JPH05329679A (en) * | 1992-05-29 | 1993-12-14 | Amada Co Ltd | Method and device for laser beam machining |
| JP2000042778A (en) * | 1998-07-22 | 2000-02-15 | Amada Co Ltd | Laser machining method and its device |
| CN103639596A (en) * | 2013-12-26 | 2014-03-19 | 唐山市丰南区华信精密制管有限公司 | Nitrogen protection device and method in laser welding process |
| CN106964899A (en) * | 2017-06-02 | 2017-07-21 | 长沙理工大学 | Method for connecting dissimilar materials by laser deep melting-brazing |
| CN206839431U (en) * | 2017-07-06 | 2018-01-05 | 重庆工商职业学院 | Adaptive cooling type hybrid Laser-Arc Welding system |
| CN107695516A (en) * | 2017-10-25 | 2018-02-16 | 扬州杰泰克电子有限公司 | A kind of dustless high efficiency optical-fiber laser welder |
| CN208408891U (en) * | 2018-07-02 | 2019-01-22 | 岗春激光科技（江苏）有限公司 | A kind of auxiliary device and laser-beam welding machine |
-
2019
- 2019-10-31 CN CN201911054096.9A patent/CN110842359A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05329679A (en) * | 1992-05-29 | 1993-12-14 | Amada Co Ltd | Method and device for laser beam machining |
| JP2000042778A (en) * | 1998-07-22 | 2000-02-15 | Amada Co Ltd | Laser machining method and its device |
| CN103639596A (en) * | 2013-12-26 | 2014-03-19 | 唐山市丰南区华信精密制管有限公司 | Nitrogen protection device and method in laser welding process |
| CN106964899A (en) * | 2017-06-02 | 2017-07-21 | 长沙理工大学 | Method for connecting dissimilar materials by laser deep melting-brazing |
| CN206839431U (en) * | 2017-07-06 | 2018-01-05 | 重庆工商职业学院 | Adaptive cooling type hybrid Laser-Arc Welding system |
| CN107695516A (en) * | 2017-10-25 | 2018-02-16 | 扬州杰泰克电子有限公司 | A kind of dustless high efficiency optical-fiber laser welder |
| CN208408891U (en) * | 2018-07-02 | 2019-01-22 | 岗春激光科技（江苏）有限公司 | A kind of auxiliary device and laser-beam welding machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922519A (en) * | 2020-08-10 | 2020-11-13 | 西安建筑科技大学 | Laser welding device |
| CN113547215A (en) * | 2021-08-23 | 2021-10-26 | 上海交通大学 | Welding device for strengthening and toughening ultrahigh-strength steel welding joint based on self-distribution |
| CN113547215B (en) * | 2021-08-23 | 2022-08-02 | 上海交通大学 | Welding device for strengthening and toughening ultrahigh-strength steel welding joint based on self-distribution |
| CN115555745A (en) * | 2022-07-12 | 2023-01-03 | 杨志尧 | Real-time temperature and shape control equipment for thick plate laser welding |
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Application publication date: 20200228 |