CN107498177A - A kind of non-penetration laser welding method and system - Google Patents
A kind of non-penetration laser welding method and system Download PDFInfo
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- CN107498177A CN107498177A CN201711000645.5A CN201711000645A CN107498177A CN 107498177 A CN107498177 A CN 107498177A CN 201711000645 A CN201711000645 A CN 201711000645A CN 107498177 A CN107498177 A CN 107498177A
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- laser
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
-
- 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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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention discloses a kind of non-penetration dual-beam laser welding method and system, comprises the following steps：Step 1, offer need to splice the first mother metal and the second mother metal of welding；Step 2, the first mother metal and the second mother metal vertically spliced and clamped up and down；Step 3, laser welding system is provided, laser welding system has first laser head, second laser head, and first laser head, the laser beam of second laser head focus emission are arranged side by side and are symmetric along welding direction；Step 4, the laser welding system that starts, the double laser beam that first laser head, second laser head focus on formation respectively tilt the first mother metal surface of irradiation, complete welding process.Invention additionally discloses a kind of non-penetration dual-beam laser welding system.Relative to prior art, the present invention has good welding effect, and technique is simple, control is easy, cost is cheap.
Description
Technical field
The present invention relates to a kind of laser welding field, more particularly to a kind of non-penetration dual-beam laser welding method is with being
System.
Background technology
It is a kind of welding method of high-energy-density using laser as energy carrier in laser welding, is laser processing technology
Should
One of importance, laser technology are applied to the development that welding technique has greatly been promoted in welding, laser welding
Due to that with speed of welding is fast, depth is big, deformation is small, can be welded under room temperature or specific condition, the letter of welding equipment device
The advantages that single, it is used widely in industrial circle.
Laser welding is divided into both of which：Laser heat conduction welding and Laser Deep Penetration Welding.Laser heat conduction welding is similar to tungsten
Electrode argon arc welding, welding efficiency are relatively low.Laser Deep Penetration Welding is to use high-energy-density（More than 106 W/cm2）Laser beam shines
Material surface, material rapid melting, vaporization are mapped to, or even forms plasma, huge material carburation by evaporation pressure makes material
The liquid surface of middle fusing is formed " keyhole " to lower recess, also known as " aperture ", into aperture laser energy almost by whole
Absorb, violent evaporation is produced in the side wall of aperture and bottom.Continue to irradiate with laser, aperture persistently maintains, and works as laser
After stopping irradiation, the liquation backflow on aperture periphery, cooled and solidified forms weld seam.
Reinforcement technique currently for parts such as similar elevator lift-cabin wall panels is gluing, tedious process, is wasted time and energy, and is used
Glue can aging after certain time limit.It is poor using joint for resistance spot welding seal, easily influence surface quality.In some accurate occasions,
To ensure the working environment of box house component, the reinforcement outside casing is all welded using non-penetration, more generally electric
Arc rivet welding, improve the performance of solder joint by filler wire, but pad surface has very big projection, box house easily produces
The overlap edge size of deformation, reinforcement and casing is big, and not only waste of materials, also add the weight of casing, rather than penetration laser
Welding single face-formed just can overcome the disadvantages that these shortcomings, not only can be with spot welding, and can be easily achieved and quickly connect using laser
Continuous seam weld, reaches the welding point more much higher than single Joint Strength.
Connect compared to full penetration laser welding, the change of non-penetration laser welding welding parameters is more sensitive, welding parameter it is micro-
The defects of small change may all cause joint generation not merged, back is burnt.The exterior appearance of weld seam is to judge non-penetration laser
An important factor for welding piece welding quality, it is desirable to which slag can not occur in face of weld, or even surface discolouration can not occur.
The patent of invention of Publication No. " B of CN 104002044 " discloses a kind of non-penetration laser welding equipment and welding
Method, by the temperature of real-time capture back of weld, welding penetration situation is drawn, so as to be adjusted in real time to laser power,
Solve the problems, such as that welding penetration accurately controls when the non-penetration of laser welds to a certain extent, but the technical scheme is still deposited
In problems with：The corresponding relation of back of weld temperature and welding penetration is difficult to accurately obtain in actual production in this method, and
Complex process.
The utility model patent of Publication No. " U of CN 204524558 " discloses a kind of device of the non-penetration weld of laser,
Workpiece to be welded is placed on the workbench with cooling water, solves the non-penetration welding of laser layer steel at present to a certain extent
The temperature distortion problem on surface, but problems with still be present in the technical scheme：By 20 DEG C of cooling water cooling in this method
But lower floor's steel, the temperature distortion to lower floor's steel improve limitation, and the outer surface oxidation stain incapability to lower floor's steel is
Power.
The patent of invention of Publication No. " A of CN 103008884 " discloses a kind of non-method for weld-penetration welding of laser lap,
Welded, solved to a certain extent outside stainless steel trolley coach steel construction in non-penetration face covering protection film cut-off air
The problem of non-penetration face of dew aoxidizes, but problems with still be present in the technical scheme：This method is for welding process
Back burns caused by the factors such as the fluctuation of middle laser parameter are even burnt unmanageable.
The content of the invention
A kind of method and system of non-penetration laser welding is provided in the present invention, there is good welding effect, and technique
Simply, control is easy.
The present invention provides a kind of non-penetration dual-beam laser welding method, comprises the following steps.
Step 1, offer need to splice the first mother metal and the second mother metal of welding, the first mother metal and the second work mother metal.
Step 2, the first mother metal and the second mother metal vertically spliced and clamped up and down.
Step 3, laser welding system is provided, laser welding system has first laser head, second laser head, first laser
Head, the laser beam of second laser head focus emission are arranged side by side and are symmetric along welding direction.
Step 4, start laser welding system, the double laser beam that first laser head, second laser head focus on formation respectively inclines
Tiltedly the first mother metal surface of irradiation, complete welding process.
In a wherein embodiment, in step 3, in laser welding system, the intersection point of double laser beam center line is just
One work mother metal and the second mother metal splice place.
In a wherein embodiment, in step 3, in laser welding system, double laser beam center line and the first mother metal surface
The angle α of normal is between 20 ° -60 °.
In a wherein embodiment, in step 3, laser welding system also include respectively with first laser head, second laser
First jet, the second nozzle that head is correspondingly arranged, first jet, second nozzle are respectively aligned to first laser head, second laser head
The position of welding, and first jet, second nozzle, first laser head, second laser head are each attached to together.
In a wherein embodiment, in step 4, the molten bath that double laser beam is formed is in X shapes.
In a wherein embodiment, in step 4, impulse waveform output energy of the double laser beam according to setting, double laser beam
The impulse waveform of setting mutually staggers so that the output of double laser beam energy rises one after another, and obtains this and opens that weld keyhole closed.
The present invention also provides a kind of non-penetration dual-beam laser welding system, including first laser head, second laser head, the
One laser head, the laser beam of second laser head focus emission are arranged side by side and are symmetric along welding direction, and double laser beam
According to the impulse waveform output energy of setting, the impulse waveform of double laser beam setting mutually staggers.
In a wherein embodiment, laser welding system also include respectively with first laser head, second laser head is corresponding sets
First jet, the second nozzle put, first jet, second nozzle are respectively aligned to first laser head, the position of second laser head welding
Put, and first jet, second nozzle, first laser head, second laser head are fixed together by connecting plate.
In a wherein embodiment, the intersection point of double laser beam center line splices place in the first mother metal and the second mother metal just,
The angle α of double laser beam center line and the first mother metal surface normal is between 20 ° -60 °.
In a wherein embodiment, the molten bath that double laser beam is formed is in X shapes.
Brief description of the drawings
Fig. 1 is a kind of non-penetration dual-beam laser welding method schematic diagram of the embodiment of the present invention.
Fig. 2 is welding process cross-sectional view when the energy of laser beam one exports in welding method shown in Fig. 1.
Fig. 3 is welding process cross-sectional view when the energy of laser beam two exports in welding method shown in Fig. 1.
Fig. 4 is the timing chart of laser beam one in welding method shown in Fig. 1.
Fig. 5 is the timing chart of laser beam two in welding method shown in Fig. 1.
In figure：1. the first mother metal 2. second mother metal, 3. connecting plate 4. first jet, 5. first lasers first 6. first
The fixture 12. first of 10. welding direction of first 8. second laser beam, 9. second nozzle of the second laser of laser beam 7. 11. welds
Connect the weld keyhole of 13. molten bath of aperture 14. second.
Embodiment
Technical scheme is described in detail below with reference to accompanying drawing 1-5 and specific embodiment.
As Figure 1-5, in the embodiment of the present invention, a kind of non-penetration dual-beam laser welding method comprises the following steps.
Step 1, offer need to splice the first mother metal 1 and the second mother metal 2 of welding, using the method preparation of machining
Formed.In the present embodiment, the thickness of the first mother metal 1 and the second mother metal 2 is 1mm-5mm.
Step 2, impurity in the first mother metal 1 and the upper and lower surface of the second mother metal 2 is removed, with weld jig 11 by the first mother metal
1 and second mother metal 2 accurately vertically splice and clamp up and down so that the first mother metal 1 and the second mother metal 2 are tight under weld jig clamping
Closely connected conjunction, so as to greatly reduce the adjustment time of soldering cramping apparatus.
Step 3, provide laser welding system, laser welding system has that first laser is first 5, second laser first 7, Yi Jifen
Not first with first laser 5, first jet 4, the second nozzle 9 that second laser first 7 is correspondingly arranged.
First laser beam 6, the second laser beam 8 that first laser is first 5, the Position Design of second laser first 7 is focus emission
It is arranged side by side and is symmetric along welding direction 10.The angle of double laser beam center line and mother metal surface normal is α, angle α
It can be adjusted in the range of 20 ° -60 °.First laser is first 5, the distance of second laser first 7 and angle coordinate, and makes double laser beam
The intersection point of center line splices place in the first mother metal 1 and the second mother metal 2 just, and the molten bath 13 that double laser beam is formed is in X shapes（Such as figure
2nd, shown in Fig. 3）, obtained weld seam is wider, combines two mother metals more firm.
First jet 4, second nozzle 9 are respectively aligned to that first laser is first 5, the position of first 7 welding of second laser, and the first spray
Mouth 4, second nozzle 9, first laser are first 5, second laser first 7 is each attached on connecting plate.So, first jet 4, second nozzle
9th, first laser is first 5, second laser first 7 can move simultaneously, controls relatively simple reliable.Certainly in other embodiments, the
One nozzle 4, second nozzle 9, first laser are first 5, second laser first 7 can corresponding to nozzle be connected with laser head, or even homogeneously
Mutually separation.
Step 4, start laser welding system, first laser is first 5, second laser first 7 focuses on the double laser beam of formation respectively
Irradiation the first mother metal 1 surface is tilted, completes welding process.The molten bath formed using symmetrical dual-beam laser welding, double laser beam
It is combined into one, can cools down simultaneously, is advantageous to the control of welding deformation.And weld seam is wider, make the connection between mother metal more firm
It is Gu reliable.
Double laser beam can export energy according to the impulse waveform of setting, in the present embodiment, as shown in Figure 4, Figure 5, bidifly
The impulse waveform that light beam is set is the rectangular pulse that mutually staggers so that the double laser beam energy output of symmetrical side-by-side distribution
" rising one after another "（I.e. when first laser beam high-energy exports, second laser beam is in low-energy state, and vice versa）, obtain
The weld keyhole of " this opens that and closed "（I.e. when the first weld keyhole 12 that first laser beam is formed runs through the first mother metal 1 and the second mother
During material 2, second laser beam does not form weld keyhole or the second weld keyhole 14 of formation does not run through, and vice versa, such as Fig. 2, Fig. 3
It is shown）, so as to overcome laser splice welding when welding process unstability.In the present embodiment, rectangular pulse is in low electricity
Usually, the low energy of laser beam output forms the energy threshold needed less than weld keyhole, therefore does not form weld keyhole.At it
In its embodiment, as needed, when rectangular pulse is in low level, the low energy of laser beam output can be higher than weld keyhole shape
Into the energy threshold of needs, weld keyhole is formed.Certainly, in other embodiments, can also be set as non-rectangle as needed
Impulse waveform.
The embodiment of the present invention also provides a kind of non-penetration dual-beam laser welding system, including first laser first 5, second swashs
Shaven head 7, first laser is first 5, the laser beam of first 7 focus emission of second laser is arranged side by side and is symmetric along welding direction,
And impulse waveform output energy of the double laser beam according to setting, the impulse waveform of double laser beam setting mutually stagger.
Alternatively, laser welding system also include respectively first with first laser 5, second laser first 7 be correspondingly arranged first
Nozzle 4, second nozzle 9, first jet 4, second nozzle 9 are respectively aligned to that first laser is first 5, the position of first 7 welding of second laser,
And first jet 4, second nozzle 9, first laser are first 5, second laser first 7 is fixed together by connecting plate.
Alternatively, the intersection point of double laser beam center line splices place in the first mother metal 1 and the second mother metal 2 just, double laser beam
The angle α of center line and the surface normal of the first mother metal 1 is between 20 ° -60 °.
Alternatively, the molten bath that double laser beam is formed is in X shapes.
The present invention uses symmetrical dual-beam laser welding, and weld keyhole is stabilized in welding process, is not melted so as to overcome
Welding process unstability during welding thoroughly.In addition, the molten bath that double laser beam of the present invention is formed is combined into one, it can simultaneously cool down, have
Controlled beneficial to mother metal back face deformation, and weld seam is wider, makes the connection between workpiece more solid and reliable.
Claims (10)
1. in a kind of non-penetration dual-beam laser welding method, it is characterised in that comprise the following steps：
Step 1, offer need to splice the first mother metal and the second mother metal of welding；
Step 2, the first mother metal and the second mother metal vertically spliced and clamped up and down；
Step 3, laser welding system being provided, laser welding system has first laser head, a second laser head, first laser head,
The laser beam of second laser head focus emission is arranged side by side and is symmetric along welding direction；
Step 4, the laser welding system that starts, the double laser beam that first laser head, second laser head focus on formation respectively tilt spoke
According to the first mother metal surface, welding process is completed.
A kind of 2. non-penetration dual-beam laser welding method according to claim 1, it is characterised in that：In step 3, laser
In welding system, the intersection point of double laser beam center line splices place in the first mother metal and the second mother metal just.
A kind of 3. non-penetration dual-beam laser welding method according to claim 2, it is characterised in that：In step 3, laser
In welding system, the angle α of double laser beam center line and the first mother metal surface normal is between 20 ° -60 °.
A kind of 4. non-penetration dual-beam laser welding method according to claim 2, it is characterised in that：In step 3, laser
Welding system also includes first jet, the second nozzle being correspondingly arranged respectively with first laser head, second laser head, the first spray
Mouth, second nozzle be respectively aligned to first laser head, second laser head welding position, and first jet, second nozzle, first swash
Shaven head, second laser head are each attached to together.
A kind of 5. non-penetration dual-beam laser welding method according to claim 2, it is characterised in that：In step 4, bidifly
The molten bath that light beam is formed is in X shapes.
A kind of 6. non-penetration dual-beam laser welding method according to claim 5, it is characterised in that：In step 4, bidifly
Impulse waveform output energy of the light beam according to setting, the impulse waveform of double laser beam setting mutually stagger so that double laser beam energy
Amount output rises one after another, and obtains this and opens that weld keyhole closed.
A kind of 7. non-penetration dual-beam laser welding system, it is characterised in that including first laser head, second laser head, first
Laser head, the laser beam of second laser head focus emission are arranged side by side and are symmetric along welding direction, and double laser beam according to
Energy is exported according to the impulse waveform of setting, the impulse waveform of double laser beam setting mutually staggers.
A kind of 8. non-penetration dual-beam laser welding system according to claim 7, it is characterised in that：Laser welding system
Also include first jet, the second nozzle being correspondingly arranged respectively with first laser head, second laser head, first jet, the second spray
Mouth is respectively aligned to first laser head, the position of second laser head welding, and first jet, second nozzle, first laser head, second
Laser head is fixed together by connecting plate.
A kind of 9. non-penetration dual-beam laser welding system according to claim 7, it is characterised in that：Double laser beam center
The intersection point of line splices the angle at place, double laser beam center line and the first mother metal surface normal in the first mother metal and the second mother metal just
α is between 20 ° -60 °.
A kind of 10. non-penetration dual-beam laser welding system according to claim 7, it is characterised in that：Double laser beam shape
Into molten bath be in X shapes.
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| CN201711000645.5A CN107498177B (en) | 2017-10-24 | 2017-10-24 | A kind of non-penetration laser welding method and system |
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| CN201711000645.5A CN107498177B (en) | 2017-10-24 | 2017-10-24 | A kind of non-penetration laser welding method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213707A (en) * | 2018-01-26 | 2018-06-29 | 吉林大学 | Laser Welding penetration signal real-time monitoring device and method based on supersonic guide-wave |
| CN112743234A (en) * | 2020-12-30 | 2021-05-04 | 长沙理工大学 | Method and system for welding magnesium alloy thick plate by high-power laser |
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| CN107225326A (en) * | 2017-08-03 | 2017-10-03 | 上海嘉强自动化技术有限公司 | One kind is based on low frequency copped wave speculum pulse composite welding optical system |
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| CN112743234A (en) * | 2020-12-30 | 2021-05-04 | 长沙理工大学 | Method and system for welding magnesium alloy thick plate by high-power laser |
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| CN107498177B (en) | 2019-10-15 |
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