CN104493360A - Gas protection device for welded joint formed by laser flexible welding - Google Patents
Gas protection device for welded joint formed by laser flexible welding Download PDFInfo
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- CN104493360A CN104493360A CN201410730369.8A CN201410730369A CN104493360A CN 104493360 A CN104493360 A CN 104493360A CN 201410730369 A CN201410730369 A CN 201410730369A CN 104493360 A CN104493360 A CN 104493360A
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- protection gas
- laser
- protection
- gas jets
- dock leveler
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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
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention provides a gas protection device for a welded joint formed by laser flexible welding. Two fixing bolts are mounted on a welding head; a protection gas nozzle is connected to a height adjustment plate; a sliding chute is formed in the height adjustment plate, so that the height adjustment plate can be used for adjusting the height of the protection gas nozzle and a transverse distance between the protection gas nozzle and the welding head; a fixed angle is formed at the lower end of the height adjustment plate; the gas nozzle is always in an optimal protection gas lateral blowing angle; the section of a protection gas spraying opening is an elliptical section. By the chute in the height adjustment plate, nuts on the fixing bolts and the fixed angle at the lower end of the height adjustment plate, the upper and lower distance and the left and right distance of the protection gas nozzle can be adjusted, and the angle of the protection gas nozzle can be fixed; therefore, the welded joint can be always well protected by protection gas, a welding defect, caused by poor protection, of the welded joint is avoided, and the welding quality is guaranteed.
Description
Technical field
The present invention relates to a kind of laser beam welding gas shield device, the device of especially laser flexible welding process weld seam gas shield.Belong to laser welding technology field.
Background technology
Laser Welding is the welding method utilizing the laser beam of high-energy-density to carry out a kind of high-efficiency and precision welded as source.There is because of it advantages such as high-energy-density, deep penetration, high accuracy, strong adaptability and be subject to the attention of each developed country.Laser Welding has very important effect for the welding of some special materials and structure, and this welding method obtains applying more and more widely in the high-technology fields such as space flight and aviation, electronics, automobile making, nuclear power.
Welding robot is the advanced welding equipment grown up on the basis of industrial robot, is the robot production unit specializing in welding.Due to welding robot have that clear and definite, the easy to control output of production life cycle, flexibility degree are high, welding quality stable and the plurality of advantages such as production efficiency is high, therefore improve product structure part quality, enhancing productivity and alleviating in labor strength etc. has significant meaning.
In recent years when carrying out small lot, multi items, many artificial and multiplex's dress etc. and producing, in order to lower labour cost, enhance productivity, again robot and laser welding technology are combined, composition laser flexible welding system, realizes multi-faceted laser weld, and it not only can weld by the various forms of weld seam such as implementation rule weld seam and space curve welding seam, also can be used for the welding of precise structure, welded unit that quality requirement is high, application prospect is very extensive.
In actual production; flexible welding joint location needs to convert according to weld shape; usually the factors such as whether whether suitable the and laser incidence angle of focal position of laser vertical are only considered at conversion process; often ignore air protection method when it is in different attitude; therefore in welding process; often there will be protective gas flow field disorderly; extraneous gas invades the situation of liquid state molten pool; extraneous gas enters molten bath will form weld defect; not only production cost increases, and too increases the risk of product rejection simultaneously.
Along with product structure precision is increasingly multiple strict, weld seam form becomes increasingly complex, and effects on surface integrality and internal soundness require more and more higher.If the problem that the protected effect that occurs in flexible welding process is uneven can not be solved, the application of laser flexible solder technology on fine structure Product jointing is produced will be limited.
Summary of the invention
For laser flexible welding system when welding because producing the uneven problem of weld seam protection effect; the present invention proposes a kind of laser flexible welded seam gas shield device; be intended to realize the comprehensive gas shield to parametric curve weld seam; to avoid in welding process, owing to protecting the tendentiousness of the weld defect of bad generation, obtaining good weldquality.
The present invention adopts following technical scheme.
Laser flexible welded seam gas shield device, comprising: install stud, DOCK LEVELER, hold-down nut, protection gas jets and nozzle mount;
DOCK LEVELER is provided with chute, and DOCK LEVELER lower end connects nozzle mount;
Protection gas jets is connected with DOCK LEVELER by nozzle mount, and protection gas jets is a relative fixed angle with DOCK LEVELER; Protection gas jets is provided with protection gas-tpe fitting; The outlet of protection gas jets is directed to laser welding system;
DOCK LEVELER is by being fixed in laser welding system through the installation stud of chute and hold-down nut.
Stud is positioned at same datum line for the hold-down nut of the both sides of level altitude adjustable plate, to ensure protection gas jets angle.
Further, the present invention, when implementing, can do preferably following:
Protection gas jets outer shape is the tapered elongated protective cover of head with; Inwardly projecting orifice cross sectional shape is oval; Oval major axis about 15 ± 2mm, minor axis about 10 ± 1mm;
Preferred protection gas jets is 25 ° ± 1 ° relative to the setting angle of laser beam axis;
By DOCK LEVELER and the relative displacement of installation stud, regulate protection gas jets setting height(from bottom), preferably protection gas jets exceeds focal position of laser 15 ± 1mm;
By adjustment hold-down nut, the position on stud is being installed, is regulating the horizontal cross position of protection gas jets, preferably the outlet of protection gas jets and laser beam axis lateral separation 30 ± 2mm.
As a further improvement on the present invention, DOCK LEVELER lower end be connected between nozzle mount for be flexibly connected, realized and the connection of DOCK LEVELER upper end by screw rod.That is, hinged by screw rod between described DOCK LEVELER lower end and nozzle mount, and clamp nut is provided with on screw rod.
Supplement further as doing the present invention, protection gas jets changes flexible plastic into by copper direct tube section and protects tracheae, and protection gas jets can bend arbitrarily.
Laser flexible welded seam all positon gas shield device of the present invention, this device is bolted on laser head, side-blown shielding gas flow field is formed during welding, and can realize protecting the height of gas jets to regulate with the DOCK LEVELER of chute by a centre, regulate horizontal spacing between protection gas jets and laser beam axis by regulating the position of hold-down nut on bolt; DOCK LEVELER lower end is that the openend that an angle fixes can be used for fixing protection gas jets, after this angle is through calculating, and the protection gas jets optimum embedding angle degree drawn; Protection gas jets inlet end is the fast insert-pull that a quick connector can realize air inlet pipe, and cross section, outlet side is not traditional circle and is through the elliptic cross-section of protected effect the best that fluidics calculates.
Protection gas jets height and side-blown angle is adjusted by DOCK LEVELER and adjusting nut.Protective device nozzle installation form is the side-blown of laser paraxonic.
Adopt the protective device that the present invention proposes, can realize by this connecting screw rod the adjustment protecting gas jets angle, avoid issuable interference.Protection gas jets changes the plastics protection tracheae that can bend arbitrarily into, and this tracheae has certain rigidity, can keep the directive property of air-flow, while with weldment produce interfere time, the characteristic that can bend under stressing conditions due to it thus alleviate collision dynamics.Adopt the protective device that the present invention proposes; when using laser flexible welding system to weld complicated weld seam; good to the liquid state molten pool all positon protection of whole piece weld seam, test proves to use this protective device to obtain good quality of weld seam molding, and does not occur internal flaw.The flexible laser welding line all positon gas shield device that the present invention proposes; by the device of nozzle height and nozzle and laser beam distance and the protection gas outlet shapes through optimal design can be regulated; achieve the comprehensive gas shield of flexible welding; make weld seam protection uniform in effect consistent; avoid due to uneven the caused weld defect of protected effect; thus ensureing the quality of welding, the present invention has very strong application prospect in actual production.
Accompanying drawing explanation
Fig. 1 laser flexible welded seam gas shield device structural representation
Fig. 2 DOCK LEVELER structural representation
Fig. 3 protects gas jets gas outlet schematic shapes
DOCK LEVELER after Fig. 4 improves and nozzle mount schematic diagram
Fig. 5 improves rear air jet pipe schematic diagram
In figure, mark represents: 1-installs stud; 2 DOCK LEVELERs; 3-DOCK LEVELER hold-down nut; 4-protects gas jets; 5-tracheae quick connector; 6-nozzle mount; 7-plumb joint; 8-weldment; 9-appendix
Detailed description of the invention
Below, by reference to the accompanying drawings and specific embodiment, invention is further described.
Operation principle: by the device schematic diagram shown in Fig. 1 and 2, protective device entirety installs stud by 2 to be fixed on laser head, side-blown shielding gas flow field is formed during welding, be respectively equipped with 2 nuts above each stud, 2 nuts are used for fixing DOCK LEVELER and the lateral separation between adjustment jet expansion and laser beam axis; Establish a chute in the middle of DOCK LEVELER, this chute is used to the height of secured adjusted plate and adjustment protection gas jets.
Particularly, laser flexible welded seam gas shield device, comprising: install stud 1, DOCK LEVELER 2, hold-down nut 3, protection gas jets 4 and nozzle mount 6;
Chute is provided with in the middle of DOCK LEVELER 2; DOCK LEVELER 2 is by installing studs 1 through 2 groups of chute and hold-down nut 3 is fixed in laser welding system, and protection gas jets exceeds focal position of laser 15mm; By adjustment hold-down nut, the position on stud is being installed, is regulating the lateral attitude of protection gas jets, the outlet of protection gas jets and laser beam axis lateral separation 30mm; Stud is positioned at same datum line for the hold-down nut of the both sides of level altitude adjustable plate, to ensure protection gas jets angle;
Hinged by screw rod between DOCK LEVELER 2 lower end and nozzle mount 6, and clamp nut is provided with on screw rod; Protection gas jets 4 is provided with protection gas-tpe fitting 5; The outlet of protection gas jets 4 is directed to laser welding system; When protection gas jets is 25 ° relative to the setting angle of laser beam axis, clamp nut is locked;
Protection gas jets is the plastics protection tracheae that can bend arbitrarily; Protection gas jets 4 outer shape is the tapered elongated protective cover of head with; Inwardly projecting orifice cross sectional shape is oval; Oval major axis 15mm, minor axis 10mm.
Need before weldering to analyze the optimum height of protection gas jets and workpiece and the optimal lateral distance of nozzle gas outlet distance laser beam optical axis; then the hold-down nut of DOCK LEVELER is loosened; first leftmost side nut on bolt is threaded to required distance; this distance is the nozzle distance laser beam optimal lateral distance analyzing gained; then according to analysis gained optimum nozzle height, move up and down DOCK LEVELER and two, rightmost side nut can be fixed after suitable to protection gas jets distance surface of the work.
As shown in Figure 2, the nozzle mount 6 that DOCK LEVELER lower end connects is not straight plate but has the swash plate of certain angle, this angle is the best protection gas jets setting angle through computational analysis gained, how to change in the position of this angle no matter laser head, protective gas flow field all will disorder cause protection bad; At DOCK LEVELER is a pair ear type structure bottom, and this device is used for fixing protection gas jets, loosens to prevent protection gas jets from producing in plumb joint motion process.
As shown in Figure 3; the outlet of protection gas jets is not traditional circle but oval; this is because through computational analysis; the protection domain of the more circular gas outlet of gas flowfield protection domain using the gas outlet shape of this type to be formed is larger, is applicable to protect gas jets laser flexible that is relative and the frequent change location of workpiece to weld.
In this design, the protection gas jets setting angle of current design is uncontrollable, in actual welding process, there is protection gas jets sometimes and weld surrounding environment and produce the situation of interfering, at this moment with regard to needing, suitable adjustment is carried out to avoid interfering to protection gas jets angle, follow-uply can to make further improvements the present invention, as shown in Figure 4, the nozzle mount of DOCK LEVELER lower end is connected and changes detachable flexible connection into, the connection with DOCK LEVELER upper end is realized by set bolt, the adjustment protecting gas jets angle can be realized by this connecting bolt, avoid issuable interference.
Gas jets is protected to be straight barrel type made of copper at present in this design.As a supplement, the present invention makes further improvements, and change protection gas jets into can bend plastics by copper and protect tracheae, as shown in Figure 5, this tracheae has certain rigidity, can keep the directive property of air-flow.
During welding, protection gas is inert gas, and shielding gas flow amount L is 10 ~ 15L/min.Experiment proves: adopt the present invention, and when using laser flexible welding system to weld complicated weld seam, whole piece weld seam protection is good, obtains good quality of weld seam molding, does not occur internal flaw.
The foregoing is only better possible embodiments of the present invention, not thereby limit to the scope of the claims of the present invention, therefore the equivalence change that every utilization description of the present invention and accompanying drawing content are done, be all contained in protection scope of the present invention.
Claims (7)
1. a laser flexible welded seam gas shield device, comprising: install stud (1), DOCK LEVELER (2), hold-down nut (3), protection gas jets (4) and nozzle mount (6); It is characterized in that,
DOCK LEVELER (2) is provided with chute, and DOCK LEVELER (2) lower end connects nozzle mount (6);
Protection gas jets (4) is connected with DOCK LEVELER (2) by nozzle mount (6), protects gas jets (4) with DOCK LEVELER (2) in a relative fixed angle; Protection gas jets (4) is provided with protection gas-tpe fitting (5); Protection gas jets (4) outlet is directed to laser welding system;
DOCK LEVELER (2) is by being fixed in laser welding system through the installation stud (1) of chute and hold-down nut (3).
2. according to laser flexible welded seam gas shield device described in claim 1, it is characterized in that, protection gas jets (4) outer shape is the tapered elongated protective cover of head with; Inwardly projecting orifice cross sectional shape is oval; Oval major axis 15 ± 2mm, minor axis 10 ± 1mm.
3. according to laser flexible welded seam gas shield device described in claim 1, it is characterized in that, protection gas jets is 25 ° ± 1 ° relative to the setting angle of laser beam axis.
4. according to laser flexible welded seam gas shield device described in claim 1, it is characterized in that, protection gas jets exceeds focal position of laser 15 ± 1mm.
5. according to laser flexible welded seam gas shield device described in claim 1, it is characterized in that, the outlet of protection gas jets and laser beam axis lateral separation 30 ± 2mm.
6., according to laser flexible welded seam gas shield device described in claim 1, it is characterized in that, hinged by screw rod between described DOCK LEVELER (2) lower end and nozzle mount (6), and clamp nut is provided with on screw rod.
7. according to laser flexible welded seam gas shield device described in claim 1, it is characterized in that, protection gas jets is flexible plastic protection tracheae.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730369.8A CN104493360A (en) | 2014-12-04 | 2014-12-04 | Gas protection device for welded joint formed by laser flexible welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730369.8A CN104493360A (en) | 2014-12-04 | 2014-12-04 | Gas protection device for welded joint formed by laser flexible welding |
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| CN104493360A true CN104493360A (en) | 2015-04-08 |
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| CN201410730369.8A Pending CN104493360A (en) | 2014-12-04 | 2014-12-04 | Gas protection device for welded joint formed by laser flexible welding |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171238A (en) * | 2015-09-21 | 2015-12-23 | 洛阳鹏起实业有限公司 | Laser welding gas shielding device |
| CN105171236A (en) * | 2015-09-21 | 2015-12-23 | 洛阳鹏起实业有限公司 | Laser welding gas shielding device |
| CN106001921A (en) * | 2016-06-21 | 2016-10-12 | 中国船舶重工集团公司第七二五研究所 | Follow-up gas protection device for thick plate ultra-narrow-gap laser welding with filler wire |
| CN106553012A (en) * | 2016-12-06 | 2017-04-05 | 南京宝色股份公司 | For titanium alloy laser MIG Combined Welding postwelding protective covers and welding method |
| 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 |
| CN108637511A (en) * | 2018-05-03 | 2018-10-12 | 河南科技大学 | Surfacing equipment and its gas shield device for electric spark deposition |
| CN109623150A (en) * | 2019-02-21 | 2019-04-16 | 苏州凌创电子系统有限公司 | Sensor pin welder |
| CN110102883A (en) * | 2019-06-17 | 2019-08-09 | 南京航空航天大学 | A kind of the protection device of air and method of the big thicknesses of metal part of laser welding |
| CN111644743A (en) * | 2020-07-05 | 2020-09-11 | 常州市兆晟自动化科技有限公司 | Laser welding blowing protection device for copper foil and stainless steel plate |
| CN111843197A (en) * | 2020-06-29 | 2020-10-30 | 沈阳富创精密设备有限公司 | Laser welding side-blown gas protection device |
| CN113840683A (en) * | 2019-05-28 | 2021-12-24 | 林德有限责任公司 | Quick change system for shielding gas drag nozzle |
| CN115945780A (en) * | 2022-12-22 | 2023-04-11 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser welding composite shielding gas device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171238A (en) * | 2015-09-21 | 2015-12-23 | 洛阳鹏起实业有限公司 | Laser welding gas shielding device |
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| CN106001921A (en) * | 2016-06-21 | 2016-10-12 | 中国船舶重工集团公司第七二五研究所 | Follow-up gas protection device for thick plate ultra-narrow-gap laser welding with filler wire |
| CN106553012A (en) * | 2016-12-06 | 2017-04-05 | 南京宝色股份公司 | For titanium alloy laser MIG Combined Welding postwelding protective covers and welding method |
| CN108637511A (en) * | 2018-05-03 | 2018-10-12 | 河南科技大学 | Surfacing equipment and its gas shield device for electric spark deposition |
| 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 |
| CN109623150A (en) * | 2019-02-21 | 2019-04-16 | 苏州凌创电子系统有限公司 | Sensor pin welder |
| CN113840683A (en) * | 2019-05-28 | 2021-12-24 | 林德有限责任公司 | Quick change system for shielding gas drag nozzle |
| CN110102883A (en) * | 2019-06-17 | 2019-08-09 | 南京航空航天大学 | A kind of the protection device of air and method of the big thicknesses of metal part of laser welding |
| CN111843197A (en) * | 2020-06-29 | 2020-10-30 | 沈阳富创精密设备有限公司 | Laser welding side-blown gas protection device |
| CN111644743A (en) * | 2020-07-05 | 2020-09-11 | 常州市兆晟自动化科技有限公司 | Laser welding blowing protection device for copper foil and stainless steel plate |
| CN115945780A (en) * | 2022-12-22 | 2023-04-11 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser welding composite shielding gas device |
| CN115945780B (en) * | 2022-12-22 | 2023-07-21 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser welding composite shielding gas device |
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Application publication date: 20150408 |