CN107378165A - A kind of method for laser welding - Google Patents
A kind of method for laser welding Download PDFInfo
- Publication number
- CN107378165A CN107378165A CN201710821673.7A CN201710821673A CN107378165A CN 107378165 A CN107378165 A CN 107378165A CN 201710821673 A CN201710821673 A CN 201710821673A CN 107378165 A CN107378165 A CN 107378165A
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- CN
- China
- Prior art keywords
- hot spot
- spot
- mother metal
- degrades
- overlap joint
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- 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.)
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of method for laser welding, for the first mother metal to be welded into the second mother metal, comprises the following steps：A. first mother metal is arranged in and contacted with second mother metal, form overlap joint mouth between each other；B. solder is provided in the neighbouring interface of taking；C. laser head is made to pass through along the overlap joint mouth, the laser head, which is launched, degrades hot spot and main spot, along welding direction of advance, the front degraded hot spot and be located at the main spot, so that it is described degrade hot spot local heating and clean take interface, main spot melts the solder, to fill the overlap joint mouth at least in part, forms weld seam.Compared with prior art, it is of the invention to degrade hot spot and main spot by setting, mother metal is on the one hand cleaned, when main spot melts solder, the problems such as effectively prevent because of not caused enough the stomata of mother metal cleannes, splashing, intensity deficiency；On the other hand preheating mother metal, the problems such as helping to reduce weld seam appearance splashing and scalelike mark.
Description
Technical field
The present invention relates to laser welding technology field, particularly a kind of method for laser welding.
Background technology
With flourishing for automobile industry, laser soldering application is also more and more extensive.In laser brazing process, solder exists
Galvanized sheet surface wettability is sprawled, metallurgical interface behavior, appearance of weld are the key factors for influenceing soldered fitting.
In actual production, there is problems with laser soldering：(1) base material cleaning deficiency, is present under oxidization condition, can shadow
Ring weld strength and outward appearance；(2) it is difficult to solve poor adhesive force of splashing, painted caused by stomata and surface scalelike mark, corrosion resistance
It is low, Laser Processing scope it is small the problem of.
The content of the invention
It is an object of the invention to provide a kind of method for laser welding, and to solve deficiency of the prior art, it can be avoided
Because the problems such as not caused enough the stomata of mother metal cleannes, splashing, intensity deficiency, improvement solder fluidity, raising weld strength,
Attractive in appearance and process repeatability.
The invention provides a kind of method for laser welding, for the first mother metal to be welded into the second mother metal, including following step
Suddenly：
A. first mother metal is arranged in and contacted with second mother metal, form overlap joint mouth between each other；
B. solder is provided in the neighbouring interface of taking；
C. make laser head along the overlap joint mouth by the way that the laser head, which is launched, degrades hot spot and main spot, along weldering
Connect direction of advance, the front degraded hot spot and be located at the main spot so that it is described degrade hot spot local heating and clean take
Interface, main spot melt the solder, to fill the overlap joint mouth at least in part, form weld seam.
Method for laser welding as described above, these, it is preferred to, the hot spot that degrades degrades hot spot and including first
Two degrade hot spot, and described first degrades hot spot and described second degrades the front both sides that hot spot is set in parallel in the main spot.
Method for laser welding as described above, these, it is preferred to, the energy value for degrading hot spot offer is less than described
The energy value that main spot provides.
Method for laser welding as described above, these, it is preferred to, the energy value for degrading hot spot and the main spot
It can adjust, and first degrades hot spot and the second energy value for degrading hot spot and can individually adjust.
Method for laser welding as described above, these, it is preferred to, the hot spot that degrades is circular light spot.
Method for laser welding as described above, these, it is preferred to, the main spot is square focus spot.
Compared with prior art, the present invention degrades hot spot and main spot by setting, due to degrading hot spot before main spot
Side, on the one hand clean mother metal, main spot melt solder when, effectively prevent because not caused enough the stomata of mother metal cleannes,
The problems such as splashing, intensity deficiency；On the other hand preheating mother metal, the problems such as helping to reduce weld seam appearance splashing and scalelike mark.
Brief description of the drawings
Fig. 1 is the welding method schematic diagram of the present invention；
Fig. 2 is the three hot spot irradiation area top views of the present invention；
Fig. 3 is the weld seam profile of the present invention.
Description of reference numerals：The mother metals of 1- first, the mother metals of 2- second, 3- overlap joint mouths, 4- solders, 5- degrade hot spot, 6- key lights
Spot, 7- first degrade hot spot, and 8- second degrades hot spot, 9- weld seams.
Embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, is only used for explaining the present invention, and can not be construed to
Limitation of the present invention.
As shown in Figure 1 to Figure 3, the embodiment provides a kind of method for laser welding, for the first mother metal 1 to be welded
The second mother metal 2 is connected to, is comprised the following steps：
A. first mother metal 1 is arranged in and contacted with second mother metal 2, form overlap joint mouth 3 between each other.As excellent
Select scheme, the first mother metal 1 in the present embodiment is L-shaped part, and the second mother metal 2 is plate, and the side of L-shaped part is bonded with plate, separately
Side is vertical with plate, and overlap joint mouth 3 is formed at the bending part of L-shaped part.
B. solder 4 is provided at the neighbouring overlap joint mouth 3.
C. make laser head (not shown) along the overlap joint mouth 3 by the way that the laser head, which is launched, degrades hot spot 5 and key light
Spot 6, along welding direction of advance, the front degraded hot spot 5 and be located at the main spot 6, so that described degrade the part of hot spot 5
Heat and clean at overlap joint mouth 3, main spot 6 melts the solder 4, to fill the overlap joint mouth 3 at least in part, forms weld seam
9。
The operation principle of above-described embodiment is：Due to degrading hot spot 5 in the front of main spot 6, one side cleaning mother metal, in master
When hot spot 6 melts solder 4, the problems such as effectively prevent because of not caused enough the stomata of mother metal cleannes, splashing, intensity deficiency；
On the other hand preheating mother metal, the problems such as helping to reduce the appearance of weld seam 9 splashing and scalelike mark.
It is described degrade hot spot 5 and degrade hot spot 7 and second including first degrade hot spot 8, described first degrades hot spot 7 and described
Second degrades the front both sides that hot spot 8 is set in parallel in the main spot 6.Solder 4 fills up gap after melting, form weld seam 9, make
Hot spot 5 is degraded with two, the region of weld seam 9 of the first mother metal 1 and the second mother metal 2 is cleaned and preheat respectively, if being degraded using single
For hot spot 5, it is necessary to clean two mother metals simultaneously, required spot diameter is excessive, reaches same energy density, and laser power needs big
Amplitude increase.
Relative to the energy density of main spot 6, the energy value for degrading the offer of hot spot 5 provides less than the main spot 6
Energy value.It is smaller that preceding two beam degrades the laser energy of hot spot 5, and main purpose is cleaning base material and local heating mother metal；Main spot 6
Laser energy is big, melts solder 4 but non-fusible mother metal, in welding direction, solder 4 is laid in weld seam 9.Due to degrading light
Spot 5 cleans mother metal in front of main spot 6, when main spot 6 melts solder 4, effectively prevent because mother metal cleannes are not enough led
The problems such as stomata of cause, splashing, intensity deficiency；Mother metal is preheated, the problems such as helping to reduce the appearance of weld seam 9 splashing and scalelike mark.
Further, it is described to degrade hot spot 5 and the energy value of the main spot 6 be by the spectral module of laser head
Regulation, and first degrades hot spot 7 and the second energy value for degrading hot spot 8 and can individually adjust, to meet different technology conditions
With the needs of material.
Further, the hot spot 5 that degrades is circular light spot, smaller relative to the laser energy of main spot 6, and degrades light
The local heating of spot 5 simultaneously cleans metal base.
Further, the main spot 6 is square focus spot, relative to traditional circular light spot, melts laser needed for solder 4
Energy reduces, the increase of laser brazing process parameter window.
Construction, feature and the action effect of the present invention, above institute is described in detail according to the embodiment shown in schema above
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change, or be revised as the equivalent embodiment of equivalent variations, when still without departing from specification and illustrating covered spirit,
All should be within the scope of the present invention.
Claims (6)
- A kind of 1. method for laser welding, for the first mother metal (1) to be welded into the second mother metal (2), it is characterised in that including following Step：A. first mother metal (1) is arranged in and contacted with second mother metal (2), form overlap joint mouth (3) between each other；B. solder (4) is provided at neighbouring described overlap joint mouth (3) place；C. make laser head along the overlap joint mouth (3) by the way that the laser head, which is launched, degrades hot spot (5) and main spot (6), edge Welding direction of advance, the front degraded hot spot (5) and be located at the main spot (6), so that described degrade hot spot (5) part Heating and clean overlap joint mouth (3) place, main spot (6) melts the solder (4), to fill the overlap joint mouth (3) at least in part, Form weld seam (9).
- 2. method for laser welding according to claim 1, it is characterised in that：The hot spot (5) that degrades degrades including first Hot spot (7) and second degrades hot spot (8), and described first, which degrades hot spot (7) and described second, degrades hot spot (8) and be set in parallel in institute State the front both sides of main spot (6).
- 3. method for laser welding according to claim 2, it is characterised in that：The energy value that hot spot (5) offer is provided The energy value provided less than the main spot (6).
- 4. method for laser welding according to claim 3, it is characterised in that：It is described to degrade hot spot (5) and the main spot (6) energy value can be adjusted, and first degrades hot spot (7) and the second energy value for degrading hot spot (8) and can individually adjust Section.
- 5. according to the method for laser welding described in claim any one of 1-4, it is characterised in that：The hot spot (5) that degrades is circle Shape hot spot.
- 6. according to the method for laser welding described in claim any one of 1-4, it is characterised in that：The main spot (6) is square Hot spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710821673.7A CN107378165A (en) | 2017-09-13 | 2017-09-13 | A kind of method for laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710821673.7A CN107378165A (en) | 2017-09-13 | 2017-09-13 | A kind of method for laser welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107378165A true CN107378165A (en) | 2017-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710821673.7A Pending CN107378165A (en) | 2017-09-13 | 2017-09-13 | A kind of method for laser welding |
Country Status (1)
| Country | Link |
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| CN (1) | CN107378165A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382817A (en) * | 2019-01-25 | 2021-09-10 | 本田技研工业株式会社 | Soldering apparatus and soldering method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908230A (en) * | 2006-08-23 | 2007-02-07 | 浙江工业大学 | Alloy coating technique for metallic screw assembly surface |
| CN101513692A (en) * | 2008-02-21 | 2009-08-26 | 富士迈半导体精密工业（上海）有限公司 | Method for cutting brittle materials by laser and device |
| CN101564799A (en) * | 2008-04-25 | 2009-10-28 | 宝山钢铁股份有限公司 | Compound welding method by using semiconductor laser and CO2 laser |
| CN104741798A (en) * | 2015-03-24 | 2015-07-01 | 张立国 | Composite focus space-time synchronized drilling system and method |
| US20160067824A1 (en) * | 2014-09-09 | 2016-03-10 | G.C. Laser Systems, Inc. | Laser ablation and processing methods and systems |
| JP2016107299A (en) * | 2014-12-05 | 2016-06-20 | 株式会社Ｉｈｉ検査計測 | Laser cleaning device |
-
2017
- 2017-09-13 CN CN201710821673.7A patent/CN107378165A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908230A (en) * | 2006-08-23 | 2007-02-07 | 浙江工业大学 | Alloy coating technique for metallic screw assembly surface |
| CN101513692A (en) * | 2008-02-21 | 2009-08-26 | 富士迈半导体精密工业（上海）有限公司 | Method for cutting brittle materials by laser and device |
| CN101564799A (en) * | 2008-04-25 | 2009-10-28 | 宝山钢铁股份有限公司 | Compound welding method by using semiconductor laser and CO2 laser |
| US20160067824A1 (en) * | 2014-09-09 | 2016-03-10 | G.C. Laser Systems, Inc. | Laser ablation and processing methods and systems |
| JP2016107299A (en) * | 2014-12-05 | 2016-06-20 | 株式会社Ｉｈｉ検査計測 | Laser cleaning device |
| CN104741798A (en) * | 2015-03-24 | 2015-07-01 | 张立国 | Composite focus space-time synchronized drilling system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382817A (en) * | 2019-01-25 | 2021-09-10 | 本田技研工业株式会社 | Soldering apparatus and soldering method |
| JPWO2020152913A1 (en) * | 2019-01-25 | 2021-10-28 | 本田技研工業株式会社 | Brazing device and brazing method |
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Application publication date: 20171124 |