CN1287946C - T-shape joint double light beam laser synchronous welding method and device - Google Patents
T-shape joint double light beam laser synchronous welding method and device Download PDFInfo
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- CN1287946C CN1287946C CN 200410069245 CN200410069245A CN1287946C CN 1287946 C CN1287946 C CN 1287946C CN 200410069245 CN200410069245 CN 200410069245 CN 200410069245 A CN200410069245 A CN 200410069245A CN 1287946 C CN1287946 C CN 1287946C
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Abstract
The present invention discloses a T-shaped joint double-beam laser synchronous welding method and devices of the method, which particularly relates to the T-shaped joint laser welding. The present invention is characterized in that a laser beam generated from a laser source is split into two laser beams, then the two laser beams which are processed by beam splitting are respectively focused on both sides of a T-shaped joint (work piece) through two independent welded joints, and a powder filling material is respectively fed to laser molten pools on both of the two sides of the T-shaped joint through two paths of powder feeding so as to carry out the synchronous welding. In order to realized the method, the present invention also provides a welding device and a powder dividing device, the welding device is used for obtaining the two desired laser beams through a laser device, and the powder dividing device is used for obtaining the desired power of the two paths through a powder feeder. A main beam emitted by the laser device is split into two beams through a beam splitting reflecting mirror, and the beams respectively passes through turnover mirrors and enter a left and a right welded joints to be focused. The welding is carried out on both of the two sides of the T-shaped joint simultaneously, so that the welding efficiency is high; the molten pools formed by the two laser beams are integrated into a whole and simultaneously shrink by cooling, which is favorable to control the stress and the deformation.
Description
Technical field
The present invention relates to a kind of high power laser light processing method, particularly the laser weld of T connector.
Background technology
In the manufacturing of boats and ships, aircraft etc., there is a large amount of T connectors.The coupling method of T connector comprises riveted joint, bonding and welding.Riveted joint and bonding not only production efficiency are low, and waste material and increase construction weight, therefore be mainly used in some are difficult to weld or traditional welding method can not meet the demands the material and the connection of structure, the riveted joint mode was mainly still adopted in the connection of high strength alumin ium alloy structure at present during machine like flying was made.Than riveted joint and bonding, welding production efficiency height is that the various structures that comprise T connector connect topmost method.But traditional welding method-as flame, electric arc, plasma arcs etc., energy density is not high, speed of welding is low, and hot input quantity is big, and welded internal stress and deflection are big, for the ageing strengthening material of high strength alumin ium alloy and so on, also exist the softening deficiency that waits of joint.
Laser weld has plurality of advantages, has obtained application more and more widely in industrial production.Because laser has good transmission and focus characteristics, process can be with whole concentration of energy in a bit after focusing on, therefore, laser weld can be used the zone of minimum energy in minimum, and also shorten greatly action time, be that process velocity improves greatly, thereby hot input quantity is little, thereby can obtain ultrafine seam organization, and the heat affected area is also minimum, guaranteed that welding point has good performance, welded distortion is also minimum.
Known method for laser welding generally adopts beam of laser.For T connector, adopt single light beam respectively when weld in proper order the both sides of joint, not only welding efficiency is low, and stress deformation is difficult for fine control.On the other hand, known laser weld is not added packing material generally speaking.Laser weld is prepared groove and the requirement of assembly precision in order to reduce, and perhaps in order to improve the metallurgical machinery performance of welding point, has developed the method for laser welding that adopts filler wire.But, adopt the laser weld of filler wire very strict to welding wire directive property and welding process requirement, Laser Welding Quality depends on the aligning accuracy of welding wire, and any interference that welding wire is sent process to can cause the generation of weld defect immediately.
Summary of the invention
The object of the present invention is to provide a kind of T connector double light beam laser synchronous welding method and device, to avoid the deficiency in the existing laser welding technology.
T connector double light beam laser synchronous welding method is characterised in that in the technical scheme of the present invention: will be divided into two bundle laser from the beam of laser that a lasing light emitter produces, then, adopt two independently plumb joint two after bundle laser with beam split focus on the both sides of workpiece T connector respectively, and carry the powder packing material to weld synchronously to the laser molten pool of T connector both sides respectively by the two-way powder feeding.
The mode that the required two bundle laser of welding are beam of laser of being produced by a CO2 laser instrument by beam split in this method obtains.Weld required two-way powder filler and supplied with by two separate powder feed systems, perhaps the mode by minute powder produces required two-way powder.
Finish the double light beam laser welder of T connector double light beam laser synchronous welding method in the technical solution of the present invention, be characterised in that: the main beam 7 that laser instrument sends is divided into right light beam 6 and left light beam 6 ' by first dichroic reflector 8 and second dichroic reflector 9, and right light beam 6 and left light beam 6 ' enter the both sides that act on T connector after right light beam plumb joint 11 and left light beam plumb joint 11 ' focus on respectively through right light beam steering mirror 10 and left light beam steering mirror 10 ' respectively.
In the double light beam laser welder of the present invention, first dichroic reflector 8 radially can move left and right with respect to main beam 7, can accurately adjust the luminous power ratio of right light beam 6 and left light beam 6 ', the luminous power ratio adjustable range of wherein right light beam 6 is greater than 0 smaller or equal to 70%, and the luminous power ratio adjustable range of left light beam 6 ' is less than 100% more than or equal to 30%.
In the double light beam laser welder of the present invention, right light beam plumb joint 11 or left light beam plumb joint 11 ' comprise a speculum 17 and a reflective focus lamp 18, and the divided beams that laser instrument sends is introduced into speculum acts on T connector again after reflective focus lamp focuses on respectively both sides; Whole plumb joint can be around 360 ° of rotations of C axle, and focus lamp 18 can be around B axle beat ± 175 °.
In the double light beam laser welder of the present invention, right light beam steering mirror 10 can move left and right together with left light beam plumb joint 11 ' together with right light beam plumb joint 11, left light beam steering mirror 10 ', around the rotation of C axle and focus lamp 18 beat around the B axle, the distance between two focal beam spots can be regulated arbitrarily between 0～600mm in conjunction with plumb joint.
Finish the branch powder device of the required powder filler laser weld of T connector double light beam laser synchronous welding method in the technical solution of the present invention, be characterised in that: form by cavity 12, powder inlet 13, atomization chamber 14, the right side the fall powder funnel 15 ' and right meal outlet 16 and left meal outlet 16 ' of powder funnel 15 and a left side that fall.Wherein powder inlet 13 is positioned at the position, center of cavity 12 tops, and right side powder funnel 15 and the left side powder funnel 15 ' that falls that falls is symmetrically arranged in the below of cavity 12.
The present invention adopts two bundle laser to weld simultaneously from " T " joint both sides, and not only welding efficiency height, and the molten bath that two bundle laser form unites two into one, and cooling is simultaneously shunk, and helps stress and Deformation Control.Adopt the flexible powder bundle to provide packing material, possess the advantage that adopts filler wire on the one hand,, adjust weld seam metallurgical machinery performance, and the adjustment of powder composition is convenient as reducing the requirement that joint is prepared to the weld zone; Avoided adopting the deficiency of filler wire on the other hand again,, also do not had the problem of jackscrew and haircuts as there not being the problem of welding wire alignment and centering difficulty.
Description of drawings
Fig. 1 is a principle schematic of the present invention;
Fig. 2 is a dual-beam welder schematic diagram of the present invention;
Fig. 3 is a welder focus head structural representation of the present invention;
Fig. 4 is the beam split part of welder of the present invention;
Fig. 5 is the first dichroic reflector translation structure schematic diagram;
Fig. 6 is speculum and focus lamp translation structure schematic diagram;
Fig. 7 is the rotational structure schematic diagram;
Fig. 8 divides powder device schematic diagram for the present invention;
Fig. 9 T connector dual-beam of the present invention is the weld seam of welding synchronously;
The weld seam that T connector welds in proper order in Figure 10 prior art;
Among the figure: 1.T type joint base plate, 2.T type joint riser, 3. dual-beam weld seam, 3 '. the single beam first road weld seam, 3 ". the single beam second road weld seam, 4. right powder-feeding nozzle; 4 '. left powder-feeding nozzle, 5. right powder stream, 5 '. left powder stream; 6. right light beam, 6 '. left light beam, 7. main beam; 8. first dichroic reflector, 9. second dichroic reflector, 10. right light beam steering mirror; 10 '. left light beam steering mirror, 11. right light beam plumb joints, 11 '. left light beam plumb joint; 12. chamber shells, the powder funnel 13. powder inlet, 14. atomizing branch powder chambeies, 15. right sides fall, 15 '. the left side powder funnel that falls, 16. right meal outlet, 16 '. left meal outlet 17. plumb joint light beam steering mirrors, 18. plumb joint focus lamps, 19. spring, 20. the first dichroic reflector microscope base, 21. position adjustments screws, 22. leaded light buckets, 23. trip bolt, 24. guide groove, 25. upper binding heads, 26. lower union joints.
The specific embodiment
Embodiments of the present invention are referring to above each accompanying drawing.Usually traditional semi-transparent semi-reflecting lens of employing or spectro-prism are divided into beam of laser on the methodological principle of two bundle laser and are applicable to above-mentioned purpose.But semi-transparent semi-reflecting lens generally is applicable to the beam split of YAG laser, and spectro-prism is not suitable for high power CO
2The beam split of laser damages because the top of prism may be melted when high power laser light shines.And the spectroscope among the present invention adopts is metallic mirror, because the excellent heat conductivity performance of metal and to the high reflectance of laser beam makes metallic mirror can bear the more laser beam of high power density.Moreover, the cooling that metallic mirror surface is good can be eliminated the negative effect that causes by being heated inequality that semi-transparent semi-reflecting lens or spectro-prism are easy to generate, so metallic mirror is fit to high-power CO very much
2The beam split of laser.The mirror that is adopted among the present invention is metallic mirror surface.
When adopting known method for laser welding order to weld from the T connector both sides, appearance of weld as shown in figure 10.Owing to be one-sided order welding, one side weld of preceding weldering exerts an influence to the fit-up gap of another joint, the weld seam that then welds a side exerts an influence to the weld seam and the stress distribution of preceding weldering one side again, so the control difficulty of the clamping of joint and welding stress deformation increases.Adopt two focused beams 6 shown in Figure 1 and 6 ' when weld synchronously the T connector both sides, appearance of weld as shown in Figure 9.Because the molten bath that two bundle laser form unites two into one, cooling is simultaneously shunk, and helps stress and Deformation Control like this.
Fig. 2 represents welder schematic diagram of the present invention among the present invention.The main beam 7 that laser instrument sends is divided into right light beam 6 and left light beam 6 ' by first dichroic reflector 8 and second dichroic reflector 9.First dichroic reflector 8 radially can move left and right with respect to main beam 7, and second dichroic reflector 9 maintains static, as shown in Figure 4.By changing radially the position of first dichroic reflector 8 with respect to main beam 7, can accurately adjust the luminous power ratio of right light beam 6 and left light beam 6 ', the luminous power ratio adjustable range of wherein right light beam 6 is greater than 0 smaller or equal to 70%, and the luminous power ratio adjustable range of left light beam 6 ' is less than 100% more than or equal to 30%.
Fig. 8 represents of the present invention minute powder device diagrammatic sketch among the present invention.The powder that has a carrier gas 13 enters atomization chamber 14 from entering the mouth, uniform atomizing under the effect of carrier gas air-flow, fall through a right side then powder funnel 15 and a left side falls powder funnel 15 ' from the 16 ' output of right meal outlet 16 and left meal outlet, so just will be divided into two-way equably from one road powder of a powder feeder, enter the powder-feeding nozzle 4 and 4 ' of Fig. 1 respectively, cooperate the welder of Fig. 2 to carry out the synchronous welding of T connector dual-beam.
Fig. 5 represents the first dichroic reflector position adjustment structure schematic diagram among the present invention.The most round profile and the leaded light bucket 22 of first dichroic reflector 8 complement each other to form guide rail, make first dichroic reflector 8 can be accurately along the axis translation, and its position is regulated by position adjustments screw 21 and spring 19.20 is the first dichroic reflector microscope base, plays fixed mirror and cooling is provided.
Fig. 6 represents the translation structure schematic diagram of refracting telescope among the present invention.Inside and outside leaded light bucket complements each other to form the translation guide rail, in order to prevent both the rotation skew is arranged, and leaded light bucket inwall mills the guide groove 24 that matches with interior leaded light bucket boss together outside.After position adjustments was good, two leaded light buckets were fixing by trip bolt 23.10 is refracting telescope and microscope base.
Fig. 7 represents refracting telescope and focus lamp rotational structure schematic diagram among the present invention.After two leaded light bucket position of rotation are determined up and down, pass through screw threads for fastening by upper binding head 25 and lower union joint 26.
Technical problem to be solved has been finished in the enforcement of technical solution of the present invention, wherein installs the connection of each parts and each several part and cooperates and can adopt multiple general mode to finish.
Claims (7)
1, a kind of T connector double light beam laser welding method, it is characterized in that: will be divided into two bundle laser from the beam of laser that a lasing light emitter produces, then, adopt two independently plumb joint two after bundle laser with beam split focus on the both sides of workpiece T connector respectively, and carry the powder packing material to weld synchronously to the laser molten pool of T connector both sides respectively by the two-way powder feeding.
2, T connector method for laser welding according to claim 1 is characterized in that: weld required two bundle laser and be the beam of laser that produced by the CO2 laser instrument mode by beam split and obtain.
3, T connector method for laser welding according to claim 1 is characterized in that: weld required two-way powder filler and supplied with by two separate powder feed systems, perhaps the mode by minute powder produces required two-way powder.
4, a kind of double light beam laser welder, it is characterized in that: the main beam that laser instrument sends (7) is divided into right light beam (6) and left light beam (6 ') by first dichroic reflector (8) and second dichroic reflector (9), and right light beam (6) and left light beam (6 ') enter the both sides that act on T connector after right light beam plumb joint (11) and left light beam plumb joint (11 ') focus on respectively through right light beam steering mirror (10) and left light beam steering mirror (10 ') respectively.
5, double light beam laser welder according to claim 4, it is characterized in that: for adjusting the luminous power ratio of right light beam (6) and left light beam (6 '), first dichroic reflector (8) radially can move left and right with respect to main beam (7), the luminous power ratio adjustable range of wherein right light beam (6) is greater than 0 smaller or equal to 70%, and the luminous power ratio adjustable range of left light beam (6 ') is less than 100% more than or equal to 30%.
6, double light beam laser welder according to claim 4, it is characterized in that: right light beam plumb joint (11) or left light beam plumb joint (11 ') comprise a speculum (17) and a reflective focus lamp (18), and the divided beams that laser instrument sends is introduced into speculum acts on T connector again after reflective focus lamp focuses on respectively both sides; Whole plumb joint can be around 360 ° of rotations of C axle, and focus lamp (17) can be around B axle beat ± 175 °.
7, double light beam laser welder according to claim 4, it is characterized in that: right light beam steering mirror (10) can move left and right together with left light beam plumb joint (11 ') together with right light beam plumb joint (11), left light beam steering mirror (10 '), around the rotation of C axle and focus lamp (18) beat around the B axle, the distance between two focal beam spots can be regulated arbitrarily between 0～600mm in conjunction with plumb joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410069245 CN1287946C (en) | 2004-07-16 | 2004-07-16 | T-shape joint double light beam laser synchronous welding method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410069245 CN1287946C (en) | 2004-07-16 | 2004-07-16 | T-shape joint double light beam laser synchronous welding method and device |
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| CN1586787A CN1586787A (en) | 2005-03-02 |
| CN1287946C true CN1287946C (en) | 2006-12-06 |
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| CN 200410069245 Expired - Fee Related CN1287946C (en) | 2004-07-16 | 2004-07-16 | T-shape joint double light beam laser synchronous welding method and device |
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Cited By (1)
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| CN102581490A (en) * | 2012-03-21 | 2012-07-18 | 中国航空工业集团公司北京航空制造工程研究所 | Double-beam laser welding head in three-directional rotation |
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| CN101954543B (en) * | 2010-08-04 | 2013-01-09 | 机械科学研究院哈尔滨焊接研究所 | Non-splash, low-deformation, high-quality and high-efficiency welding method for T-shaped joint of aluminum alloy sheet |
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| CN114669873A (en) * | 2022-03-04 | 2022-06-28 | 中国船舶重工集团公司第七二五研究所 | High-power optical fiber laser double-gun symmetrical welding method for medium-thickness plate titanium alloy T-shaped joint |
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2004
- 2004-07-16 CN CN 200410069245 patent/CN1287946C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581490A (en) * | 2012-03-21 | 2012-07-18 | 中国航空工业集团公司北京航空制造工程研究所 | Double-beam laser welding head in three-directional rotation |
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| CN1586787A (en) | 2005-03-02 |
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