CN108356394B - Method for controlling cathode cleaning area in aluminum alloy welding process - Google Patents
Method for controlling cathode cleaning area in aluminum alloy welding process Download PDFInfo
- Publication number
- CN108356394B CN108356394B CN201810140190.5A CN201810140190A CN108356394B CN 108356394 B CN108356394 B CN 108356394B CN 201810140190 A CN201810140190 A CN 201810140190A CN 108356394 B CN108356394 B CN 108356394B
- Authority
- CN
- China
- Prior art keywords
- laser
- welding
- molten pool
- welded
- cleaning area
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a method for controlling a cathode cleaning area in an aluminum alloy welding process, which is characterized in that in aluminum alloy arc welding, when a workpiece to be welded is welded with a negative electrode, the range of the cathode cleaning area is adjusted by adopting three beams of laser respectively acting on the front surface of a molten pool and the two sides of the molten pool. The invention can freely control the width and cleaning range of the cleaning area; the damage to the welding quality caused by the overlarge or the undersize cathode spot jumping is prevented; when the angle is connected, the laser can be guided to prevent the cleaning area from deviating to a certain side; the requirement on the laser power density is low, and the effect of guiding the cathode spots can be achieved by low-power laser of about 300W.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy welding, and particularly relates to a method for controlling a cathode cleaning area in an aluminum alloy welding process.
Background
The surface of the aluminum alloy is covered with a layer of compact Al2O3If the oxide film is not cleaned, slag inclusion, air holes and incomplete fusion can be caused, and the mechanical property of the welding seam is influenced. During the electric arc welding process, the cathode spots have the tendency of automatically searching and cleaning an oxidation film to form a bright strip-shaped cathode cleaning area, and the phenomenon is called cathode cleaning. However, during arc welding, the runout range of the cathode spot is affected by many factors (current, voltage, welding speed, shielding gas, reverse ratio), and if the runout range is too large or too small, the welding quality is degraded.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for controlling a cathode cleaning area in an aluminum alloy welding process by using laser.
The invention is realized by the following technical scheme.
A method for controlling the cathode cleaning area in the process of welding aluminum alloy is characterized in that in the process of arc welding of aluminum alloy, when a workpiece to be welded is welded with a negative electrode, the range of the cathode cleaning area is adjusted by adopting three beams of laser which respectively act on the front surface of a molten pool and the two sides of the molten pool.
The method as described above, characterized in that the method steps comprise:
1) welding a workpiece to be welded with a negative electrode of a welding machine, wherein a welding wire is a positive electrode;
2) setting welding current and welding speed;
3) providing three laser beams by using a beam conversion device or three lasers, wherein the three laser beams are respectively arranged in front of the molten pool, on the left side of the molten pool and on the right side of the molten pool;
4) and adjusting the power density of the three beams of laser and the distance between a heat emission point at the laser action and the center of a molten pool to obtain the range and the shape of a cathode cleaning area.
The method is characterized in that the three laser beams in the step 3) comprise a first laser beam, a second laser beam and a third laser beam, wherein the first laser beam is arranged at a position 0.5-10mm away from the front of the molten pool, the second laser beam is arranged at a position 0.5-10mm away from the left side of the molten pool, and the third laser beam is arranged at a position 0.5-10mm away from the right side of the molten pool.
The method as described above, wherein the power density of the three laser beams in step 4) is adjusted to 106/cm2The above.
The method is characterized in that the distances between the heat emission points at which the three laser beams in the step 4) act and the center of the molten pool are respectively not more than 20 mm.
The method according to the above, characterized in that the stage of welding the workpiece to be welded with the negative electrode comprises: and when the direct current is reversely welded or the alternating current is welded, welding the negative electrode of the workpiece to be welded.
The method for controlling the cathode cleaning area in the aluminum alloy welding process has the beneficial technical effects that by utilizing the characteristic of high energy density of laser, when the laser is incident on a workpiece, a heat emission point of electrons is formed, the approach of a cathode spot is attracted, and an anchoring effect is formed on the cathode spot. The method can freely control the width and the cleaning range of the cleaning area; the damage to the welding quality caused by the overlarge or the undersize cathode spot jumping is prevented; when the angle is connected, the laser can be guided to prevent the cleaning area from deviating to a certain side; the requirement on the laser power density is low, and the effect of guiding the cathode spots can be achieved by low-power laser of about 300W.
Drawings
FIG. 1 is a schematic diagram of a cathode spot jumping;
FIG. 2 is a schematic diagram of laser guided cathode spot principle;
fig. 3 is a graph comparing the welding effect with or without laser guidance.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A method for controlling the cathode cleaning area in the welding process of aluminium alloy features that when the workpiece to be welded is welded to negative electrode in the arc welding of aluminium alloy, three laser beams respectively acting on the front and both sides of molten pool are used to regulate the range of cathode cleaning area. The stage of welding the negative electrode of the workpiece to be welded comprises the following steps: and when the direct current is reversely welded or the alternating current is welded, welding the negative electrode of the workpiece to be welded. The method comprises the following steps: 1) welding a workpiece to be welded with a negative electrode of a welding machine, wherein a welding wire is a positive electrode; 2) setting welding current and welding speed; 3) providing three laser beams by using a beam conversion device or three lasers, wherein the three laser beams are respectively arranged in front of the molten pool, on the left side of the molten pool and on the right side of the molten pool; preferably, the three laser beams comprise a first laser beam, a second laser beam and a third laser beam, wherein the first laser beam is arranged at a position 0.5-10mm away from the front of the molten pool, the second laser beam is arranged at a position 0.5-10mm away from the left side of the molten pool, and the third laser beam is arranged at a position 0.5-10mm away from the right side of the molten pool; 4) adjusting the power density of the three laser beams, preferably adjusting the power density of all three laser beams to 106/cm2And the distances between the heat emission points at the laser action and the center of the molten pool are preferably not more than 20mm, so that the range and the appearance of the cathode cleaning area are obtained.
Example 1
A method for controlling a cathode cleaning area in an aluminum alloy welding process comprises the following steps:
1) welding an aluminum alloy butt-joint plate to be welded to the cathode of the MIG welding machine, wherein the welding wire is the anode;
2) setting the welding current to be 150A and the welding speed to be 12 mm/s;
3) providing three beams of laser with the power of 300W by using a beam conversion device or three lasers, wherein the three beams of laser are respectively distributed at the front, the left and the right positions 3mm away from the edge of the molten pool and are uniformly distributed;
4) each beam is zero defocus;
5) cooperatively controlling a light beam conversion device or a laser and a welding machine to ensure that laser can form a heat emission point in the welding process, and the power density of three beams of laser is adjusted to 106/cm2In the above, the distances between the heat emission points of the three laser actions and the center of the molten pool are respectively 19 mm; laser guided or not welding effect pairs such as fig. 3. When laser guide welding is not carried out, the cathode spot jumping range is too large, so that the welding seam is ablated, and the surface quality of the welding seam is reduced. And the welded seam welded under the guidance of laser is added, so that the cathode spot has a proper jumping range and a smooth surface.
The principle of the invention is as follows: three beams of high-density laser are used for generating heat emission points to attract the cathode spots to approach, and the purpose of controlling the cathode cleaning appearance and the cathode cleaning range is achieved by setting the power density of each beam of laser and adjusting the relative position between each beam of laser. The cathode spot can ablate the area around the welding seam due to the overlarge jumping range, and the oxide film can be incompletely cleaned due to the undersize jumping range. Through the guide of laser, can guarantee that the cathode spot is constantly beating within the protective gas scope, avoid above unfavorable effect, realize the free control to the cathode spot, finally reach the purpose of guaranteeing the welding seam quality. Specifically, in the aluminum alloy arc welding process, when a workpiece to be welded is welded with a negative electrode, a large number of jumping cathode spots (as shown in fig. 1) are formed on the surface of the workpiece; because the work function of the oxide film is lower, electron emission is easier, so that cathode spots continuously jump to the area covered with the oxide film, and the oxide film is atomized by utilizing extremely high current density at the spots, thereby achieving the effect of cleaning the oxide film. The invention utilizes the laser to act on the heat emission points formed on the surface of the workpiece, and attracts the cathode spots to be concentrated to the heat emission points which can emit electrons more easily, thereby achieving the effect of controlling the cleaning area. Wherein, the laser beam is distributed at the front, left and right positions of the molten pool, and the free adjustment of the cathode cleaning area is realized by controlling the energy density between the laser beams and the position of the thermal emission point at the action position (as shown in figure 2 (c)).
FIG. 3 is a comparison graph of the welding effect of laser guidance and the welding effect of laser guidance, when the welding is not conducted by laser guidance, the welding seam is ablated due to overlarge cathode spot jumping range, and the surface quality of the welding seam is reduced. And the welded seam welded under the guidance of laser is added, so that the cathode spot has a proper jumping range and a smooth surface.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (5)
1. A method for controlling the cathode cleaning area in the aluminum alloy welding process is characterized in that in the aluminum alloy arc welding process, when a workpiece to be welded is welded with a negative electrode, the range of the cathode cleaning area is adjusted by adopting three beams of laser respectively acting on the front of a molten pool and the two sides of the molten pool; the method comprises the following steps:
1) welding a workpiece to be welded with a negative electrode of a welding machine, wherein a welding wire is a positive electrode;
2) setting welding current and welding speed;
3) providing three laser beams by using a beam conversion device or three lasers, wherein the three laser beams are respectively arranged in front of the molten pool, on the left side of the molten pool and on the right side of the molten pool;
4) and adjusting the power density of the three beams of laser and the distance between a heat emission point at the laser action and the center of a molten pool to obtain the range and the shape of a cathode cleaning area.
2. The method of claim 1, wherein the three lasers of step 3) comprise a first laser disposed 0.5-10mm from the front of the molten pool, a second laser disposed 0.5-10mm from the left side of the molten pool, and a third laser disposed 0.5-10mm from the right side of the molten pool.
3. The method of claim 1, wherein the power density of each of the three laser beams in step 4) is adjusted to 106W/cm2The above.
4. The method according to claim 1, wherein the heat emission points at which the three laser beams of step 4) act are respectively spaced from the center of the molten pool by a distance of not more than 20 mm.
5. Method according to claim 1, characterized in that the stage of welding the piece to be welded to the negative pole comprises: and when the direct current is reversely welded or the alternating current is welded, welding the negative electrode of the workpiece to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810140190.5A CN108356394B (en) | 2018-02-11 | 2018-02-11 | Method for controlling cathode cleaning area in aluminum alloy welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810140190.5A CN108356394B (en) | 2018-02-11 | 2018-02-11 | Method for controlling cathode cleaning area in aluminum alloy welding process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108356394A CN108356394A (en) | 2018-08-03 |
| CN108356394B true CN108356394B (en) | 2020-08-28 |
Family
ID=63005978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810140190.5A Active CN108356394B (en) | 2018-02-11 | 2018-02-11 | Method for controlling cathode cleaning area in aluminum alloy welding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108356394B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860796B (en) * | 2019-09-13 | 2021-08-17 | 上海航天设备制造总厂有限公司 | Aluminum alloy small-current arc online cleaning auxiliary laser filler wire welding method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005021775A1 (en) * | 2005-05-11 | 2006-11-16 | Technische Universität Ilmenau | Method and arrangement for the thermal joining of materials with refractory oxide surfaces |
| CN102161134A (en) * | 2009-12-01 | 2011-08-24 | 南车青岛四方机车车辆股份有限公司 | Hybrid welding method of variable-polarity square-wave tungsten electrode argon arc and laser |
| CN102990235A (en) * | 2012-12-10 | 2013-03-27 | 哈尔滨工业大学 | Fusing method of laser welding with filler wires using double TIG welding torches |
| CN103495809A (en) * | 2013-09-25 | 2014-01-08 | 哈尔滨恒普激光应用技术有限公司 | Laser-MIG composite heat source welding method for thick plate aluminum alloy |
| WO2015018989A1 (en) * | 2013-08-07 | 2015-02-12 | Peugeot Citroen Automobiles Sa | Process for welding together by arc or laser welding two superposed edges of two sheets made of aluminium or galvanised steel; joint between such parts |
| CN106488824A (en) * | 2014-05-09 | 2017-03-08 | 海斯坦普硬高科技公司 | Method for joining two blanks |
| CN107584195A (en) * | 2017-10-24 | 2018-01-16 | 沈阳理工大学 | Alternating electric arc fuse argon tungsten-arc welding system and method for Welded |
-
2018
- 2018-02-11 CN CN201810140190.5A patent/CN108356394B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005021775A1 (en) * | 2005-05-11 | 2006-11-16 | Technische Universität Ilmenau | Method and arrangement for the thermal joining of materials with refractory oxide surfaces |
| CN102161134A (en) * | 2009-12-01 | 2011-08-24 | 南车青岛四方机车车辆股份有限公司 | Hybrid welding method of variable-polarity square-wave tungsten electrode argon arc and laser |
| CN102990235A (en) * | 2012-12-10 | 2013-03-27 | 哈尔滨工业大学 | Fusing method of laser welding with filler wires using double TIG welding torches |
| WO2015018989A1 (en) * | 2013-08-07 | 2015-02-12 | Peugeot Citroen Automobiles Sa | Process for welding together by arc or laser welding two superposed edges of two sheets made of aluminium or galvanised steel; joint between such parts |
| CN103495809A (en) * | 2013-09-25 | 2014-01-08 | 哈尔滨恒普激光应用技术有限公司 | Laser-MIG composite heat source welding method for thick plate aluminum alloy |
| CN106488824A (en) * | 2014-05-09 | 2017-03-08 | 海斯坦普硬高科技公司 | Method for joining two blanks |
| CN107584195A (en) * | 2017-10-24 | 2018-01-16 | 沈阳理工大学 | Alternating electric arc fuse argon tungsten-arc welding system and method for Welded |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108356394A (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104384717B (en) | Swing laser-heated filament the welding method of butt welding is implemented in the narrow gap of a kind of slab | |
| CN101811231B (en) | Method for welding with laser-cold metal transferred arc composite heat source | |
| EP2744619B1 (en) | Method to start and use combination filler wire feed and high intensity energy source for welding | |
| US7015417B2 (en) | Workpiece welding process | |
| JP2006224130A (en) | Composite welding method of laser beam and metal argon gas (mag) arc | |
| JP3753657B2 (en) | Twin spot pulse laser welding method and apparatus | |
| JP2014036995A (en) | Welding system and welding method | |
| CN110238528B (en) | Laser-hot wire TIG (tungsten inert gas) hybrid welding method for normal wire feeding | |
| US20130136940A1 (en) | Welding system, welding process, and welded article | |
| CN110814552A (en) | Scanning galvanometer laser-high frequency pulse TIG (tungsten inert gas) hybrid welding method | |
| RU2440221C1 (en) | Method of arc laser welding of aluminium and its alloys by consumable electrode | |
| EP1136167B1 (en) | Method for guiding arc by laser, and arc guiding welding and device by the method | |
| CN108356394B (en) | Method for controlling cathode cleaning area in aluminum alloy welding process | |
| JP4848921B2 (en) | Composite welding method and composite welding equipment | |
| CN114406462A (en) | Laser welding system and light spot track control method thereof | |
| JP2001246465A (en) | Gas shielded-system arc welding method | |
| CN105618933B (en) | A kind of efficiently high-quality laser micro arc plasma complex welding method | |
| JP3946362B2 (en) | Laser induction arc welding apparatus and welding method | |
| CN108465938A (en) | The laser compound welding method on preposition electric arc liquefaction heating element surface layer | |
| JP2005329430A (en) | Laser arc complex welding method | |
| JP2002144064A (en) | Method and equipment for welding metallic member | |
| JP2002346777A (en) | Method for combined welding with laser beam and arc | |
| JPS62263869A (en) | Arc welding method | |
| CN114453754B (en) | High-speed welding hump defect suppression method based on laser arc common molten pool decoupling | |
| JP2003311456A (en) | Laser beam irradiating arc welding head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |