CN110919188A - Laser welding method - Google Patents
Laser welding method Download PDFInfo
- Publication number
- CN110919188A CN110919188A CN201911096103.1A CN201911096103A CN110919188A CN 110919188 A CN110919188 A CN 110919188A CN 201911096103 A CN201911096103 A CN 201911096103A CN 110919188 A CN110919188 A CN 110919188A
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- welding
- laser
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- filled
- seam
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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
- B23K26/70—Auxiliary operations or equipment
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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 provides a laser welding method, which fills welding materials into a welding seam; heating the materials filled in the welding seam and the welding object body to be molten by utilizing laser so as to fill the welding seam during welding; the welding object and the light beam of the laser move relatively in the welding process, and the tail end of the filling material is always positioned at the laser focus position, so that the whole welding line is melted and filled, and full welding is obtained; the obtained welding line is smooth due to the existence of the filling metal, and meanwhile, the sealing effect can be achieved.
Description
Technical Field
The invention relates to a welding method, in particular to a laser welding method.
Background
Along with market demands, higher requirements are provided for light weight and high sealing performance of a motor shell, however, due to the existence of machining chamfers in the machining process of some structures at present, welding seams obtained by pure laser welding can be sunken, and the expected effect cannot be achieved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method aims to solve the problems of weld joint depression and poor sealing effect after welding in the welding process.
In order to solve the technical problems, the invention adopts the technical scheme that: there is provided a laser welding method, which is solved by filling a metal wire into a weld during welding, comprising the steps of,
filling a welding material into the weld;
heating the materials filled in the welding seam and the welding object body to be molten by utilizing laser so as to fill the welding seam during welding;
the welding object and the laser beam in the welding process move relatively, and the tail end of the filling material is always positioned at the laser focus position, so that the whole welding seam is melted and filled, and the welding seam with tight joint is obtained.
Further, the filling material comprises the following specific steps: the welding material is continuously fed out and filled into the weld joint by the wire feeder.
Further, the continuously feeding out and filling the welding material into the welding seam by the wire feeder specifically includes:
adjusting the wire feeding speed of the wire feeding mechanism;
adjusting the degree of the depression or the protrusion of the whole welding seam filled with the melted material by adjusting the wire feeding speed;
the faster the wire feed speed is adjusted, the more raised the molten material fills the entire weld.
Further, the wire feeder feeds wire at a speed of at least 3mm/s when receiving the welding signal, and the wire feeding is stopped after receiving the welding stop signal.
Further, the wire feeder is withdrawn a very short time after the stop weld signal to achieve a wire break.
Further, the filling material is a metal material.
Further, the metal material is aluminum.
Further, the laser is a continuous laser.
The invention has the beneficial effects that: the obtained welding line is attractive due to the existence of the filling metal, and meanwhile, the sealing effect can be achieved and the reject ratio is reduced.
Drawings
The detailed structure of the invention is described in detail below with reference to the accompanying drawings
Fig. 1 is a flow chart of laser welding according to the present invention.
Fig. 2 is a schematic view of a laser welding structure according to the present invention.
1-laser, 2-wire feeder, 3-welding object.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a laser welding method according to the present invention, which includes the steps of:
step S10, filling welding materials into the welding seams;
step S20, heating the materials filled in the welding seam and the welding object body to be molten by utilizing laser so as to fill the welding seam during welding;
and step S30, the welding object and the laser beam in the welding process move relatively, and the tail end of the filling material is always in the laser focus position, so that the whole welding seam is melted and filled, and a strictly-jointed welding seam is obtained.
The obtained welding line is smooth due to the existence of the filling metal, and meanwhile, the sealing effect can be achieved and the reject ratio is reduced.
Example 1
Specifically, the welding material is filled into the welding seam, the material filled in the welding seam and the welding object body are heated to be molten by laser, or the laser is used for melting the material filled in the welding seam firstly and then flowing into the welding seam to fill the welding seam during welding, wherein the material filled in the welding seam and the welding object body are heated to be molten by laser, because of the existence of the filling welding material, therefore, the method can fill larger gaps and smaller welding gaps, and is suitable for smaller gaps of the welding seams if the materials filled in the welding seams are melted by laser and then flow into the welding seams, the method is selected to be used for welding according to actual conditions in the welding process, a welding object and a light beam of a laser move relatively in the welding process, and the tail end of the filling material is always positioned at a laser focus position, so that the whole welding seam is melted and filled, and a strictly threaded welding seam is obtained.
Specifically, the welding material is continuously fed out and filled into the welded joint by the wire feeder, the wire feeder is controlled by a single signal, and a wire feeding signal is sent out simultaneously when the welding signal is sent out, so that the wire feeder starts to feed wires.
Specifically, the wire feeding speed of the whole wire feeding mechanism;
adjusting the degree of the depression or the protrusion of the whole welding seam filled with the melted material by adjusting the wire feeding speed;
the faster the wire feeding speed is adjusted, the more convex the whole welding seam is filled with the melted material, the tighter the welding seam is; the speed of the wire feeder influences the tightness of the whole welding seam, so that the speed can be adjusted to be optimal, the welding seam can be welded better, and the welding seam cannot be too convex or too concave, and the welding seam cannot be too tight due to too concave.
Specifically, the wire feeder feeds wires at a speed of at least 3mm/s when receiving the welding signal, and the wire feeding is stopped after receiving the welding stopping signal; the relative speed of the motor shell and the laser is 7mm/s, the tail end of the wire is always positioned at the laser focus position in the welding process, meanwhile, the external wire feeding mechanism continuously adds filling metal to the welding position at a specific speed, the laser beam simultaneously acts on the motor shell body and the filling metal, the motor shell and the laser beam generate relative motion, the tail end of the filling metal does not generate relative motion, a molten pool formed by melting the motor shell body and the filling metal together is formed, the flowing property of the filling metal is superior to that of the motor shell body, namely, the liquid formed by melting the filling metal has stronger liquidity, so that better filling property can be achieved, a full welding seam can be obtained integrally, and meanwhile, the sealing effect can be achieved; the welding seam with different tightness degree is obtained by adjusting the relative relation between the speed of the wire feeding mechanism and the welding speed, if the speed of the wire feeding mechanism is not changed, the welding speed is accelerated, the tightness degree of the obtained welding seam is reduced, and if the speed of the wire feeding mechanism is accelerated, the welding speed is not changed, the tightness degree of the obtained welding seam is increased. Specifically, the wire feeding mechanism is drawn back within a very short time after the welding signal is stopped so as to achieve wire breakage, and the wire feeding mechanism is drawn back for 2mm after the welding signal is stopped until the welding is finished, so that the wire breakage is achieved.
Specifically, the filling material is a metal material, and the metal material generally has the advantages of good mechanical property, good extensibility and the like.
Specifically, the metal material is aluminum, the motor shell is an aluminum shell, aluminum is selected as a welding material, the machining precision can be reduced, the components of the body can be burnt in the welding process, the metallurgical components of the welding seam can be improved by adding a welding wire, the strength of the welding seam is enhanced, and the mechanical property is improved.
In particular, the laser is a continuous laser.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A laser welding method characterized by: comprises the steps of (a) carrying out,
filling a welding material into the weld;
heating the materials filled in the welding seam and the welding object body to be molten by utilizing laser so as to fill the welding seam during welding;
the welding object and the laser beam in the welding process move relatively, and the tail end of the filling material is always positioned at the laser focus position, so that the whole welding seam is melted and filled, and the welding seam with tight joint is obtained.
2. The laser welding method according to claim 1, characterized in that: the filling material comprises the following specific steps: the welding material is continuously fed out and filled into the weld joint by the wire feeder.
3. The laser welding method according to claim 2, characterized in that: the method for continuously sending out and filling the welding material into the welding seam through the wire feeding mechanism specifically comprises the following steps:
adjusting the wire feeding speed of the wire feeding mechanism;
adjusting the degree of the depression or the protrusion of the whole welding seam filled with the melted material by adjusting the wire feeding speed;
the faster the wire feeding speed is adjusted, the higher the projection degree of the whole welding seam filled with the melted material.
4. The laser welding method according to claim 3, characterized in that: the specific steps of adjusting the speed of the wire feeder comprise:
and when the wire feeder receives the welding signal, feeding the wire at the speed of at least 3mm/s until the wire feeder stops feeding the wire after receiving the welding stop signal.
5. The laser welding method according to claim 4, characterized in that: the specific steps of stopping feeding the wire after the welding signal is stopped comprise:
the welding stop signal is followed by a very short time during which the wire feeder is withdrawn to achieve wire breakage.
6. The laser welding method according to claim 1, characterized in that: the filling material is a metal material.
7. The laser welding method according to claim 6, characterized in that: the metal material is aluminum.
8. The laser welding method according to claim 1, characterized in that: the laser is a continuous laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096103.1A CN110919188A (en) | 2019-11-11 | 2019-11-11 | Laser welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096103.1A CN110919188A (en) | 2019-11-11 | 2019-11-11 | Laser welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110919188A true CN110919188A (en) | 2020-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911096103.1A Withdrawn CN110919188A (en) | 2019-11-11 | 2019-11-11 | Laser welding method |
Country Status (1)
| Country | Link |
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| CN (1) | CN110919188A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941119A (en) * | 2010-09-10 | 2011-01-12 | 北京工业大学 | Method for connecting aluminum alloy and steel by laser filler wire |
| CN104722921A (en) * | 2015-03-13 | 2015-06-24 | 无锡汉神电气有限公司 | Laser filler wire welding technique |
| CN108581201A (en) * | 2018-05-10 | 2018-09-28 | 大族激光科技产业集团股份有限公司 | A kind of laser filling wire welding device and method |
| CN110340522A (en) * | 2019-07-23 | 2019-10-18 | 哈尔滨现代焊接技术有限公司 | The adaptive method for laser welding in gap |
-
2019
- 2019-11-11 CN CN201911096103.1A patent/CN110919188A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941119A (en) * | 2010-09-10 | 2011-01-12 | 北京工业大学 | Method for connecting aluminum alloy and steel by laser filler wire |
| CN104722921A (en) * | 2015-03-13 | 2015-06-24 | 无锡汉神电气有限公司 | Laser filler wire welding technique |
| CN108581201A (en) * | 2018-05-10 | 2018-09-28 | 大族激光科技产业集团股份有限公司 | A kind of laser filling wire welding device and method |
| CN110340522A (en) * | 2019-07-23 | 2019-10-18 | 哈尔滨现代焊接技术有限公司 | The adaptive method for laser welding in gap |
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Application publication date: 20200327 |