CN202607080U - Laser scanning and melting metal powder soldering device - Google Patents
Laser scanning and melting metal powder soldering device Download PDFInfo
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- CN202607080U CN202607080U CN 201220245005 CN201220245005U CN202607080U CN 202607080 U CN202607080 U CN 202607080U CN 201220245005 CN201220245005 CN 201220245005 CN 201220245005 U CN201220245005 U CN 201220245005U CN 202607080 U CN202607080 U CN 202607080U
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Abstract
The utility model discloses a laser scanning and melting metal powder soldering device which is mainly used for fine soldering of foil lattice structures. Based on the laser free forming manufacturing concept, foils are integrated on the lower surface of a metal powder layer and are connected to form a lattice structure after the metal powder and the foils are molten. A high-power-density and high-light-beam-quality laser device is adopted to lead laser beams to focus to form an adjustable focusing spot under effect of a dynamic focusing unit and a galvanometer scanning lens, a designed scanning path is controlled by a computer, and the metal foils and the metal powder layer are molten through laser scanning and then are soldered for forming. The laser scanning and melting metal powder soldering device is composed of the optical fiber laser device, the dynamic focusing unit, the galvanometer scanning lens, the computer, a clamp, a powder soldering cylinder, a powder lifting cylinder and the like. The laser scanning and melting metal powder soldering device is good in laser beam mode, high in soldering accuracy and wide in application range.
Description
Technical field
The utility model relates to foil part welding field, particularly a kind of laser scanning deposite metal powder welder.
Background technology
At present, the solder technology commonly used that is used to connect large-scale lattice structure mainly contains three types: (1) arc welding, (2) electric resistance welding, (3) laser heat conduction weld.
Arc welding (electric arc welding) is a most widely used welding method in the commercial production; Its principle is to utilize heat that arc discharge produces with the fusing and after condensation, form weld seam mutually of welding rod and workpiece, thereby obtains the welding process of firm joint.
Arc welding is that manipulating electrode carries out welding job by hand, can carry out multiposition welding such as downhand welding, vertical position welding, horizontal position welding and overhead welding.Because the welding rod arc soldering equipment is light, carrying is flexible in addition, and thus, SMAW can have the place of power supply to carry out weld job any.Be applicable to the welding of various metal materials, all thickness, various planforms.
When lattice structure parts Cross section Design is thicker, more employing arc welding.But this technology is applied to connect when adopting 0.25mm lattice structure thick or more foil stock, and foil can burn through, distortion, perhaps bad connection.And the process characteristic of arc welding has reduced the feasibility that it applies to the foil welding.
Electric resistance welding (resistance welding) is that welded piece is pressed between two electrodes; And impose electric current; Resistance heat effect that workpiece contact-making surface and adjacent domain produce is heated fusing or mecystasis to utilize electric current to flow through, and makes it to form a kind of method that metal combines.
The cross section tends to use electric resistance welding in the time of thin.In the making of well sieve, electric resistance welding is confined to make the thicker cross section that can not regard foil as.Electric resistance welding needs high pressure and high electric current, and this high pressure can make the foil distortion.
Laser heat conduction weld (Laser heat conduction welding) is at material surface laser projections; Luminous energy is converted into heat energy and heat fused; The heat of material list surface layer continues to transmit to the material depths with heat conducting mode, at last two weldments is welded together.
LASER HEAT conduction welding has also begun to apply to the welding of foil morely, but it only limits to certain joint geometry, and is very strict because assembly precision requires.
More than the major defect of the three kinds of welding methods high temperature when being exactly welding can cause distortion.And these three kinds of weldings all adopt traditional fabrication technology, and are as shown in Figure 1, are about to support bar 2 and weld together as two independent parts with metal foil 1, form lattice structure.
Traditional welding needs thicker connection material, to avoid the formation of defective.But, strengthening component thickness if weld for ease, the optimization of material or design performance just can not be fully utilized.
Summary of the invention
The purpose of the utility model is to overcome the shortcoming and defect of above-mentioned prior art; A kind of laser scanning deposite metal powder welder is provided, overcomes the traditional welding method and only can weld the high temperature in thicker connection material and when welding and can cause defectives such as foil part deformation, burn through, bad connection.
The utility model is realized through following technical proposals:
A kind of laser scanning deposite metal powder welder; Comprise powder paving system, laser welding system; Said powder paving system comprises powder welding cylinder, shop powder scraper plate, powder lift cylinders, lifting piston, computer; Be provided with anchor clamps in the said powder welding cylinder, said powder lifting piston is arranged at powder cylinder up-down bottom; Said laser welding system comprises optical fiber laser, beam expanding lens, mobile negative lens, focus lamp, the scanning galvanometer that connects successively; Said powder welding cylinder, powder lift cylinders, optical fiber laser are connected with computer respectively.
Said anchor clamps are made up of portable fence and the clamping plate that are located on the portable fence.
Scanning galvanometer comprises X axle eyeglass, Y axle eyeglass, X axle eyeglass servomotor, Y axle eyeglass servomotor, and said X axle eyeglass is installed in the rotating shaft of X axle eyeglass servomotor, and said Y axle eyeglass is installed in the rotating shaft of Y axle eyeglass servomotor.
The incident light aperture of said scanning galvanometer is 20mm, and said focus lamp is the lens of φ 40, focal distance f=500mm.
A kind of laser scanning deposite metal powder welding method comprises the steps:
(1) places foil to be welded accordingly between the anchor clamps clamping plate, and, each foil welding position is reserved in beyond the clamping plate according to the size of weld seam between the foil;
(2) anchor clamps are put into the welding cylinder; The metal dust corresponding with foil gone in the shop in powder welding cylinder, and metal dust is filled between each foil welding position, and shop powder scraper plate will be laid on the metal dust at foil top and wipe off; According to the welding penetration requirement, make the powder plane be higher than the foil top;
(3) optical fiber laser gives off laser beam, and behind beam expanding lens, gets into by moving the dynamic focusing unit that negative lens and focus lamp are formed; Position according to laser solder joint plane on foil; The distance between negative lens and the focusing lens is moved in fine setting, and laser beam gets in the scanning galvanometer, incides on the X axle eyeglass; Laser beam is reflected on the Y axle eyeglass; Through cooperatively interacting of X axle eyeglass and Y axle eyeglass, the adjustable hot spot of 30 ~ 200 μ m that laser beam is obtained on the foil solder side is with the welding position and the fusion of metal powder of foil and weld together.
Input power 100～400W, the beam quality factor M of said step (3) optical fiber laser
2<1.1, wavelength 1090nm;
The sweep limits of said scanning galvanometer is 600 * 600mm.
Said powder welding cylinder is implemented inert gas shielding when welding, said inert gas is an argon gas.
Compared with prior art the beneficial effect of the utility model is:
1, adopt dynamic focusing, can obtain bigger sweep limits, can reach the focal beam spot of 30～200 μ m, power density reaches more than the 5*106W/cm2, has satisfied the needs of LASER HEAT conduction weldering and penetration fustion welding.
2, the galvanometer unit of formations such as mobile negative lens, focus lamp provides enough sweep speeds, reaches 7m/s, greatly reduces non-weld interval (laser off).
3, same scanning galvanometer; Cooperation is by moving the dynamic focusing unit that negative lens and focus lamp are formed; Can obtain the welding parameter of variable-operation distance, sweep limits and focus diameter; Wherein the depth of penetration scope of metal dust is 0.1～1mm, and the weld width scope is 0.1～0.5mm, has very big flexibility.
4, adopting portable fence is contraction type, can adapt to the foil of different in width, has widened the restraining factors of foil lattice structure parts designs, can more miniature, the meticulousr foil lattice structure of moulding.
5, scanning pattern is adjustable, can choose different scanning patterns and strategy to different foils.
6, the utility model technological means is simple and easy to do, and welding precision is high, and process applications is extensive, applicable to multiple product.Not only overcome the defective that the traditional welding method only can be welded thicker connection material, the high temperature when also having overcome welding simultaneously can cause defectives such as foil part deformation, burn through, bad connection.
Description of drawings
Fig. 1 is traditional foil welding method sketch map.
Fig. 2 is the utility model laser scanning deposite metal powder welder anchor clamps 4 structural representations.
Fig. 3 is the utility model laser scanning deposite metal powder welder structural representation.
Fig. 4 is the utility model laser scanning deposite metal powder welding process sketch map.
Fig. 5 is in the powder welding process of the utility model laser scanning deposite metal, and the welding cylinder is implemented the apparatus structure sketch map of inert gas shielding.
Fig. 6 A is in the powder welding method of the utility model laser scanning deposite metal, the weld seam vertical view of foil and the moulding of metal dust welding instance.
Fig. 6 B is in the powder welding method of the utility model laser scanning deposite metal, and foil welds the parallel schematic cross-section of bead direction of instance moulding with metal dust.
The specific embodiment
Below in conjunction with specific embodiment the utility model is done further concrete detailed description the in detail, but the embodiment of the utility model is not limited thereto, the technological parameter for not indicating especially can carry out with reference to routine techniques.
Embodiment
Like Fig. 3, shown in Figure 2; The utility model laser scanning deposite metal powder welder; Comprise powder paving system, laser welding system; Said powder paving system comprises powder welding cylinder 13, shop powder scraper plate 11, powder lift cylinders 14, lifting piston 15, computer 16, is provided with anchor clamps 4 in the said powder welding cylinder 13, and said lifting piston 15 is arranged at powder lift cylinders 14 bottoms; Said laser welding system comprises optical fiber laser 5, beam expanding lens 7, mobile negative lens 8, focus lamp 9, the scanning galvanometer 10 that connects successively; Said powder welding cylinder 13, powder lift cylinders 14, optical fiber laser 5 are connected with computer 16 respectively.
Said anchor clamps 4 are made up of with the clamping plate 3-1 that is located on the portable fence 3 portable fence 3.
Scanning galvanometer 10 comprises X axle eyeglass, Y axle eyeglass, X axle eyeglass servomotor, Y axle eyeglass servomotor, and said X axle eyeglass is installed in the rotating shaft of X axle eyeglass servomotor, and said Y axle eyeglass is installed in the rotating shaft of Y axle eyeglass servomotor.
In conjunction with Fig. 3, shown in laser scanning deposite metal powder welding method, comprise the steps:
(1) places foil to be welded accordingly between the anchor clamps 4 clamping plate 3-1, and, each foil welding position is reserved in beyond the clamping plate 3-1 according to the size of weld seam between the foil;
(2) anchor clamps 4 are put into powder welding cylinder 13, the metal dust 12 corresponding with foil 1 gone in the shop in powder welding cylinder 13, and metal dust 12 is filled between each foil 1 welding position, spreads metal dust 12 stricklings that powder scraper plate 11 will be laid on foil 1 top; In addition, according to welding requirements, shop bisque number is 1～2 layer, and the thickness of every layer of powder is about 30 ~ 100 μ m.
(3) optical fiber laser 5 gives off laser beam 6, behind beam expanding lens 7, gets into by moving the dynamic focusing unit that negative lens 8 and focus lamp 9 are formed; Position according to laser solder joint plane on foil 1; The distance between negative lens 8 and the focusing lens 9 is moved in fine setting, and laser beam 6 gets in the scanning galvanometer 10, incides on the X axle eyeglass; Laser beam 6 is reflected on the Y axle eyeglass; Through cooperatively interacting of X axle eyeglass and Y axle eyeglass, the adjustable hot spot of 30 ~ 200 μ m that laser beam 6 is obtained on foil 1 solder side is with the welding position of foil 1 and metal dust 12 fusings and weld together.
When welding, implements by above-mentioned powder welding cylinder 13 inert gas shielding.
According to formula d=4 λ M
2Spot diameter during F/ (π D) adjustment welding, wherein d is a focal beam spot, M
2Be beam quality factor, λ is a wavelength, and F is for moving the focal length of negative lens 8, and D is laser beam 6 diameters before focusing on, d and M
2Proportional.
Specifically describe welding method below in conjunction with Fig. 3.
Move negative lens 8 and constitute dynamic focussing module with focusing lens 9.Move negative lens 8 and constitute dynamic focussing module with focus lamp 9.Moving negative lens 8 is walked at laser beam 6 transmission direction small distances by the drive of servomotor (not shown); Scanning position according to laser beam 6; The distance between negative lens 8 and the focus lamp 9 is moved in adjustment, and to weld hot spot roughly the same plane on foil 1 after making laser beam 6 through the scanning galvanometer deflections.To move negative lens 8 and place (not shown) adjustment distance on the moving guide rail, and make the scanning galvanometer sweep limits in 600 * 600mm, adjust flexibly with servomotor.
Simultaneously; Through computer 16 controls (perhaps manually control); Realize moving negative lens 8 and the big distance walking of servomotor in laser beam 6 transmission directions, can obtain different working distance (focal length), corresponding sweep limits is adjustable in 600 * 600mm;, spot diameter at 30 μ m between the 200 μ m.
Wherein in the welding process; Annexation between foil 1 to be welded, anchor clamps 4 and the metal dust 12 is as shown in Figure 4; Through the width of alignment jig 4, foil 1 is fixed on therebetween, (0.1 ~ 1mm) to form a hole below anchor clamps 4 needed recessed metal dust 12 planes; Supply metal dust 12 to be filled in the welding position of each foil 1, the recessed degree of depth of anchor clamps 4 is looked required bead contour and is decided.Laser beam 6 after process focusing and the reflection projects the surface of foil and metal dust 12, with its fusing back and foil welding fabrication.
In welding process, need weld cylinder 13 to powder and carry out inert gas shielding as stated, powder is welded cylinder 13 sealings and is full of high-purity argon gas.
As shown in Figure 5, form in the process of weld seam in metal dust 12 fusings, do not produce oxidation in order to guarantee active element; Also need the local gas protection; Can high-purity argon gas carrier pipe 18 be designed to " returning " font, be looped around around the foil 1 of moulding to be welded, on tube wall, have aperture 19; Around foil 1, discharge high-purity argon gas 17, form the local gas protection.
Fig. 6 A, 6B are foil 1 and metal dust 12 welding instance shaping schematic views; Wherein 6A is that foil 1 welds the weld seam vertical view of instance moulding with metal dust 12; 6B is that foil 1 welds the bead direction parallel cut sketch map of instance moulding with metal dust 12; 20 is weld seams among the figure.
In the actual welding process; If it is bad that anchor clamps 4 are located in powder welding cylinder 13; Foil 1 slight distortion also can cause metal dust 12 to be fallen in the slit between foil 1 and the clamping plate 3-1, and it is not good that the general who has surrendered makes foil 1 joint under metal dust 12 horizontal planes that cause thus.Overcome this problem, need between clamping plate 3-1 and foil 1, add temporary support material, its thickness is the gap width of structural requirement, and and recessed to foil 1 surface.
Just can realize the utility model preferably as stated.
The foregoing description is the utility model preferred implementation; But the embodiment of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection domain of the utility model.
Claims (4)
1. a laser scanning deposite metal powder welder is characterized in that, comprises powder paving system, laser welding system, it is characterized in that:
Said powder paving system comprises powder welding cylinder, shop powder scraper plate, powder lift cylinders, lifting piston, computer, is provided with anchor clamps in the said powder welding cylinder, and said powder lifting piston is arranged at powder cylinder up-down bottom; Said laser welding system comprises optical fiber laser, beam expanding lens, mobile negative lens, focus lamp, the scanning galvanometer that connects successively; Said powder welding cylinder, powder lift cylinders, optical fiber laser are connected with computer respectively.
2. laser scanning according to claim 1 deposite metal powder welder is characterized in that: said anchor clamps are made up of portable fence and the clamping plate that are located on the portable fence.
3. laser scanning according to claim 1 and 2 deposite metal powder welder; It is characterized in that: scanning galvanometer comprises X axle eyeglass, Y axle eyeglass, X axle eyeglass servomotor, Y axle eyeglass servomotor; Said X axle eyeglass is installed in the rotating shaft of X axle eyeglass servomotor, and said Y axle eyeglass is installed in the rotating shaft of Y axle eyeglass servomotor.
4. laser scanning according to claim 3 deposite metal powder welder is characterized in that: the incident light aperture of said scanning galvanometer is 20mm, and said focus lamp is the lens of φ 40, focal distance f=500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220245005 CN202607080U (en) | 2012-05-28 | 2012-05-28 | Laser scanning and melting metal powder soldering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220245005 CN202607080U (en) | 2012-05-28 | 2012-05-28 | Laser scanning and melting metal powder soldering device |
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| Publication Number | Publication Date |
|---|---|
| CN202607080U true CN202607080U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220245005 Withdrawn - After Issue CN202607080U (en) | 2012-05-28 | 2012-05-28 | Laser scanning and melting metal powder soldering device |
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| CN (1) | CN202607080U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699531A (en) * | 2012-05-28 | 2012-10-03 | 华南理工大学 | Welding method for melting metal powder by laser scanning and device thereof |
| CN109689279A (en) * | 2016-04-29 | 2019-04-26 | 努布鲁有限公司 | Visible light lasers increasing material manufacturing |
-
2012
- 2012-05-28 CN CN 201220245005 patent/CN202607080U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699531A (en) * | 2012-05-28 | 2012-10-03 | 华南理工大学 | Welding method for melting metal powder by laser scanning and device thereof |
| CN102699531B (en) * | 2012-05-28 | 2015-01-28 | 华南理工大学 | Welding method for melting metal powder by laser scanning and device thereof |
| CN109689279A (en) * | 2016-04-29 | 2019-04-26 | 努布鲁有限公司 | Visible light lasers increasing material manufacturing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121219 Effective date of abandoning: 20150128 |
|
| RGAV | Abandon patent right to avoid regrant |