CN108890059A - A kind of Welding of Aluminium Alloy Sheet Structure method - Google Patents
A kind of Welding of Aluminium Alloy Sheet Structure method Download PDFInfo
- Publication number
- CN108890059A CN108890059A CN201811112337.6A CN201811112337A CN108890059A CN 108890059 A CN108890059 A CN 108890059A CN 201811112337 A CN201811112337 A CN 201811112337A CN 108890059 A CN108890059 A CN 108890059A
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- Prior art keywords
- workpiece
- welding
- laser cutting
- aluminium alloy
- laser
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- 238000003466 welding Methods 0.000 title claims abstract description 40
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003698 laser cutting Methods 0.000 claims abstract description 46
- 239000007921 spray Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000011261 inert gas Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 230000001112 coagulating effect Effects 0.000 claims 1
- 230000008016 vaporization Effects 0.000 claims 1
- 238000009834 vaporization Methods 0.000 claims 1
- 101700004678 SLIT3 Proteins 0.000 description 6
- 102100027339 Slit homolog 3 protein Human genes 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a kind of Welding of Aluminium Alloy Sheet Structure methods, it is characterised in that：Step 1 provides the first workpiece and second workpiece of the welding that needs to splice；First workpiece and second workpiece are accurately spliced and are clamped by step 2；Step 3 provides third workpiece, and third workpiece is located at the surface of second workpiece；Step 4 provides laser cutting system；Step 5 provides air column spray gun；Step 6 provides ultrasonic vibration installation；Step 7, starting laser cutting system, laser cutting head focus the laser beam to be formed and vertically irradiate third workpiece surface；Step 8, starting air column spray gun, air column lance ejection inert gas act on the metal drop that laser cutting is formed；Step 9, starting ultrasonic generator；Step 10 completes welding process.Compared with the existing technology, the present invention has good welding effect.
Description
Technical field
The present invention relates to welding field more particularly to a kind of Welding of Aluminium Alloy Sheet Structure methods.
Background technique
In automobile production, in order to mitigate the self weight of vehicle and the driving performance of not excessive influence automobile, vapour is reduced
The work of weight of the vehicle in addition to chassis is always those skilled in the art in the direction of effort.Because of aluminium alloy light-weight and one
Fixed plasticity and surface corrosion resistance energy, has had using this technology and has substituted common sheet metal to process vehicle body.But
This kind of aluminium alloy has a serious defect to be exactly, when carrying out the welding in process, due to its coefficient of heat conduction is big,
The big reason of linear expansion coefficient, easily generation deflection deformation.Therefore, the welding of aluminium alloy sheet is all in large-scale jig at present
It is operated under fixation, such as common piano type welding fixture.However this particularity of traditional Welding of Aluminium Alloy Sheet Structure is given
Actual production brings many unfavorable factors：Manufacture large-scale jig increases production cost, and the clamping of welded part is made before weldering
Too long at working hour, labor intensity improves, and reduces production efficiency.
Laser welding has many advantages, such as that heat input is small, deforms small.Laser welding is divided into laser heat conduction weld and laser is deep
Fusion welding mode.Efficient welding is using Laser Deep Penetration Welding mode in production, and material is in high energy density laser at this time
Under directly irradiating, fusing occurs and even gasifies, evaporation kickback pressure arranges molten metal, is formed so that weld pool surface sink
" keyhole "（Also referred to as aperture）, laser beam is deep into material internal by aperture.When using Laser Welding of Aluminum Alloys, need high
Energy threshold（106W/cm2）, so that thermal weld stress is larger, test specimen thermal deformation is larger；On the other hand, high energy density laser beam
Under irradiation, alloy strengthening element in aluminium alloy（Such as magnesium elements）It easily evaporates, strength of joint is caused to decline.
Summary of the invention
Present invention aim to address easily deforming during Welding of Aluminium Alloy Sheet Structure, alloying element evaporation leads to connector
The problems such as intensity is low.
1, the present invention provides a kind of Welding of Aluminium Alloy Sheet Structure method, includes the following steps：
Step 1：The first workpiece and second workpiece of the welding that needs to splice are provided, are stamped and formed out on second workpiece along welding track
One penetrating narrow slit removes the impurity of the first workpiece and second workpiece upper and lower surface and narrow slit.
Step 2：First workpiece and second workpiece are accurately spliced and clamped.
Step 3：Third workpiece is provided, third workpiece is located at the surface of second workpiece.
Step 4：Laser cutting system is provided, laser cutting system has laser generator, transmission fiber, laser cutting
Head, manipulator, fixed bracket, laser generator are connected by transmission fiber with laser cutting head.
Step 5：Air column spray gun is provided, air column spray gun is fixed on the fixation bracket of laser cutting head.
Step 6：Ultrasonic vibration installation is provided, ultrasonic amplitude transformer is pressed on the lower surface of the first workpiece.
Step 7：Start laser cutting system, laser cutting head focuses the laser beam to be formed and vertically irradiates table on third workpiece
Face.
Step 8：Start air column spray gun, air column lance ejection inert gas acts on the metal drop that laser cutting is formed.
Step 9：Start ultrasonic generator, adjusts ultrasonic frequency, molten metal is narrow under ultrasonic high-frequency vibration
It is sprawled in seam.
Step 10：Laser cutting head is moved to final position, closes laser cutting system, closes air column spray gun, keeps super
Acoustic vibration 1 ~ 2 minute, complete welding process.
In one embodiment, in step 1, the first workpiece and second workpiece are aluminium alloy, the first workpiece and second
Thickness of workpiece is 0.8 ~ 1.5 mm.
In one embodiment, in step 1, the width d of narrow slit is 0.5 ~ 1.2 mm.
In one embodiment, in step 3, the aluminium alloy of third workpiece and the first workpiece and second workpiece same material.
In one embodiment, in step 3, third thickness of workpiece is 1.0 ~ 2.0mm.
In one embodiment, in step 3, the vertical range H of second workpiece upper surface and third workpiece lower surface is 5
~10 mm。
In one embodiment, in step 4, in laser cutting system, laser cutting head focuses the laser beam function to be formed
Rate is 1 ~ 2 kW, and cutting speed is 3 ~ 10 m/min.
In one embodiment, in step 5, air column spray tip and laser cutting head are 3 ~ 5 mm at a distance of δ.
In one embodiment, in step 7, motion profile and the seam track of laser cutting head are consistent.
In one embodiment, in step 8, the gas of air column lance ejection is the inert gas of heating, such as argon gas.
In one embodiment, in step 8, the gas pressure of air column lance ejection is 0.5~5kPa.
Detailed description of the invention
Fig. 1 is a kind of equipment of Welding of Aluminium Alloy Sheet Structure method of the embodiment of the present invention and base material arrangement schematic diagram.
Fig. 2 is Welding of Aluminium Alloy Sheet Structure Longitudinal cross section schematic in method shown in Fig. 1.
Fig. 3 is narrow slit cross-sectional view in method shown in Fig. 1.
Wherein：The first workpiece of 1-, 2- second workpiece, 3- narrow slit, 4- third workpiece, 5- laser generator, 6- transmission fiber,
7- laser beam, 8- laser cutting head, 9- manipulator, the fixed bracket of 10-, 11- air column spray gun, 12- cutting seam, 13- metal drop,
14- weld seam, 15- ultrasonic amplitude transformer, 16- cut forward position.
Specific embodiment
Technical solution of the present invention is described in detail below with reference to attached drawing and specific embodiment.
As shown in Figure 1-3, the embodiment of the invention provides a kind of Welding of Aluminium Alloy Sheet Structure methods to include the following steps：
Step 1：The first workpiece 1 and second workpiece 2 of the welding that needs to splice are provided, along welding track punching press on second workpiece 2
A penetrating narrow slit 3 is formed, the impurity of the first workpiece 1 and second workpiece 2 upper and lower surface and narrow slit 3 is removed.
Optionally, the first workpiece 1 and the second work 2 are aluminium alloy, and the first workpiece 1 and 2 thickness of second workpiece are 0.8
~1.5 mm。
Optionally, the width d of narrow slit 3 is 0.5 ~ 1.2 mm.
Step 2：First workpiece 1 and second workpiece 2 are accurately spliced and clamped.
Step 3：Third workpiece 4 is provided, third workpiece 4 is located at the surface of the first workpiece 1.
Optionally, the aluminium alloy of third workpiece and the first workpiece and second workpiece same material.
Optionally, third workpiece 4 is with a thickness of 1.0 ~ 2.0mm.
Optionally, the vertical range H of 2 upper surface of second workpiece and 4 lower surface of third workpiece is 5 ~ 10 mm.
Step 4：Laser cutting system is provided, laser cutting system has laser generator 5, transmission fiber 6, laser cutting
First 8, manipulator 9, fixed bracket 10, laser generator are connected by transmission fiber 6 with laser cutting head 8.
Optionally, in laser cutting system, it is 1 ~ 2 kW, cutting speed that laser cutting head 8, which focuses 7 power of laser beam formed,
Degree is 3 ~ 10 m/min.
Step 5：Air column spray gun 11 is provided, air column spray gun 11 is fixed on the fixation bracket 10 of laser cutting head 8.
Optionally, apart δ is 3 ~ 5 mm for 11 nozzle of air column spray gun and laser cutting head 8.
Step 6：Ultrasonic vibration installation is provided, ultrasonic amplitude transformer 15 is pressed on the lower surface of the first workpiece 1.
Step 7：Start laser cutting system, laser cutting head 8 focuses the laser beam 7 formed vertically irradiation third workpiece 4
Upper surface.
Optionally, the motion profile of laser cutting head 8 is consistent with seam track.
Step 8：Start air column spray gun 11, it is molten that the injection inert gas of air column spray gun 11 acts on the metal that laser cutting is formed
Drop.
Optionally, the gas that air column spray gun 11 sprays is the inert gas of heating, such as argon gas.
Optionally, the gas pressure that air column spray gun 11 sprays is 0.5~5kPa.
Step 9：Start ultrasonic generator, adjusts ultrasonic frequency, molten metal is narrow under ultrasonic high-frequency vibration
It is sprawled in seam 4.
Step 10：Laser cutting head 8 is moved to final position, closes laser cutting system, closes air column spray gun 11, keeps
Ultrasonic activation 1 ~ 2 minute, complete welding process.
In the present invention, cut third workpiece 4 using high energy laser beam 7 and obtain metal drop 13, metal drop 13 to
Lower movement, falls into narrow slit 3, and metal drop fills up narrow slit 3, realizes the welded connecting of the first workpiece 1 and second workpiece 2, avoids
Test specimen thermal deformation and alloy strengthening element caused by biggish thermal weld stress when Direct Laser irradiation welding（Such as magnesium member
Element）The decline of strength of joint caused by evaporating.
In the present invention, cut third workpiece 4 using high energy laser beam 7 and obtain metal drop 13, metal drop 13 to
Lower movement, the high-pressure inert gas impact metal drop 13 that air column spray gun 11 sprays quick and precisely fall into narrow slit 3, promote to melt
Metal is sprawled rapidly, avoid agglomerating it is blocking cause bead crack, obtain good weld seam.
Claims (7)
1. the present invention provides a kind of Welding of Aluminium Alloy Sheet Structure method, it is characterised in that：
Step 1：The first workpiece and second workpiece of the welding that needs to splice are provided, are stamped and formed out on second workpiece along welding track
One penetrating narrow slit removes the impurity of the first workpiece and second workpiece upper and lower surface and narrow slit；
Step 2：First workpiece and second workpiece are accurately spliced and clamped；
Step 3：Third workpiece is provided, third workpiece is located at the surface of second workpiece；
Step 4：Laser cutting system is provided, laser cutting system has laser generator, transmission fiber, laser cutting head, machine
Tool hand, fixed bracket, laser generator are connected by transmission fiber with laser cutting head；
Step 5：Air column spray gun is provided, air column spray gun is fixed on the fixation bracket of laser cutting head；
Step 6：Ultrasonic vibration installation is provided, ultrasonic amplitude transformer is pressed on the lower surface of the first workpiece；
Step 7：Starting laser cutting system, laser cutting head focuses the laser beam to be formed and vertically irradiates third workpiece surface,
It is cut by laser obtained metal drop to move downward, fall into second workpiece narrow slit, metal drop passes through heat transfer mode and the
One workpiece realizes metallurgical bonding, and fills up narrow slit, realizes the welded connecting of the first workpiece and second workpiece, avoids Direct Laser spoke
According to strength of joint caused by test specimen thermal deformation caused by thermal weld stress biggish when welding and alloy strengthening elements vaporization；
Step 8：Start air column spray gun, air column lance ejection inert gas acts on the metal drop that laser cutting is formed, high pressure
Inert gas impacts metal drop, falls into metal drop quick and precisely in narrow slit, molten metal is promoted to sprawl rapidly, avoid coagulating
It is polymerized to block and causes bead crack；
Step 9：Start ultrasonic generator, adjusts ultrasonic frequency, molten metal is in narrow slit under ultrasonic high-frequency vibration
It sprawls；
Step 10：Laser cutting head is moved to final position, closes laser cutting system, closes air column spray gun, keeps ultrasonic wave
Welding process is completed in vibration 1 ~ 2 minute.
2. Welding of Aluminium Alloy Sheet Structure method according to claim 1, it is characterised in that：In step 1, the first workpiece and second
Workpiece is aluminium alloy, and the first workpiece and second workpiece thickness are 0.8 ~ 1.5 mm.
3. Welding of Aluminium Alloy Sheet Structure method according to claim 1, it is characterised in that：In step 1, the width d of narrow slit is
0.5~1.2 mm。
4. Welding of Aluminium Alloy Sheet Structure method according to claim 1, it is characterised in that：In step 3, second workpiece upper surface
Vertical range H with third workpiece lower surface is 5 ~ 10 mm.
5. Welding of Aluminium Alloy Sheet Structure method according to claim 1, it is characterised in that：In step 4, laser cutting system
In, it is 1 ~ 2 kW that laser cutting head, which focuses the laser beam power to be formed, and cutting speed is 3 ~ 10 m/min.
6. Welding of Aluminium Alloy Sheet Structure method according to claim 1, it is characterised in that：In step 5, air column spray tip with
Laser cutting head is 3 ~ 5 mm at a distance of δ.
7. Welding of Aluminium Alloy Sheet Structure method according to claim 1, it is characterised in that：In step 8, air column lance ejection
Gas pressure is 0.5~5kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811112337.6A CN108890059B (en) | 2018-09-25 | 2018-09-25 | Aluminum alloy sheet welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811112337.6A CN108890059B (en) | 2018-09-25 | 2018-09-25 | Aluminum alloy sheet welding method |
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| CN108890059A true CN108890059A (en) | 2018-11-27 |
| CN108890059B CN108890059B (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811112337.6A Active CN108890059B (en) | 2018-09-25 | 2018-09-25 | Aluminum alloy sheet welding method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319404A (en) * | 2021-09-22 | 2022-11-11 | 深圳市炜创达科技有限公司 | Processing technology and device for discharging hole plate of meat grinder |
| CN115365596A (en) * | 2021-05-18 | 2022-11-22 | 大族激光科技产业集团股份有限公司 | Welding method and welding system based on blue laser |
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| CN108890059B (en) | 2021-01-26 |
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Effective date of registration: 20231026 Address after: Room 2102, Building 7, Wuyue Garden, Puji Street Office, Kangming Road, Wuhua District, Kunming City, Yunnan Province, 650000 Patentee after: Yunnan Lvao New Technology Development Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20231026 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 410114 No. 960, Second Section of Wanjiali South Road, Tianxin District, Changsha City, Hunan Province Patentee before: CHANGSHA University OF SCIENCE AND TECHNOLOGY |
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Effective date of registration: 20231127 Address after: 650031 No. 86 Yuantong North Road, Wuhua District, Yunnan, Kunming Patentee after: Kunming Metallurgical Research Institute Co.,Ltd. Address before: Room 2102, Building 7, Wuyue Garden, Puji Street Office, Kangming Road, Wuhua District, Kunming City, Yunnan Province, 650000 Patentee before: Yunnan Lvao New Technology Development Co.,Ltd. |