Laser wire welding machine

Abstract

The present invention provides a laser wire feeding welding machine, which belongs to the field of welding equipment. It includes a laser welding head body, an optical fiber head and an optical fiber cable. A welding wire front outer tube fixing seat and a welding wire rear outer tube fixing seat are arranged below the laser welding head body. A slot body is arranged on the welding wire rear outer tube fixing seat. A laser switch button and a spring are arranged in the slot body. A switch trigger mechanism is arranged on the slot body. The switch trigger mechanism includes a trigger body, a transfer column and a limit column. The transfer column is rotatably connected with the transfer hole. A welding wire channel is arranged in the trigger body. A swing sleeve is fixed in the welding wire channel. The transfer column and the limit column are arranged on both sides of the welding wire channel. The welding wire is arranged in the welding wire rear outer tube, the swing sleeve and the welding wire front outer tube. Compared with the prior art, the structure of the present invention can effectively prevent the welding wire from bonding with the molten pool after welding, and at the same time has the advantages of accurate positioning and expandable molten pool, and has the characteristics of high welding efficiency.

Description

Technical Field

[0001] The invention belongs to the field of welding equipment, and in particular relates to a laser wire feeding welding machine. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is a heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.

[0003] The existing laser welding is to use a welding wire machine to feed the wire and align it with the workpiece to be welded, and then use a welding gun to laser heat the welding wire to form a molten pool to weld the workpieces. However, in the current laser welding process, due to the structural limitations of the laser wire feeding welding machine, that is, the welding gun, the welding wire cannot be quickly withdrawn from the molten pool on the workpiece after welding is completed, causing the welding wire to stick to the molten pool. If the above situation occurs, the welding wire needs to be reheated and melted before it can be withdrawn, which makes welding cumbersome and also affects welding efficiency. In view of this, the present invention provides a laser wire feeding welding machine. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a laser wire feeding welder, whose structure adopts an optimized design, which can effectively avoid the welding machine and the molten pool from sticking after welding, and at the same time has the advantages of precise positioning and expandable molten pool, and has the characteristics of high welding efficiency.

[0005] The present invention is achieved through the following technical solutions:

[0006] A laser wire feeding welding machine comprises a laser welding head body, an optical fiber head and an optical fiber cable, wherein the optical fiber cable is plugged and fixed to the laser welding head body through the optical fiber head, a welding wire front outer tube fixing seat and a welding wire rear outer tube fixing seat are arranged below the laser welding head body, a welding wire front outer tube is fixed on the welding wire front outer tube fixing seat, a welding wire rear outer tube is fixed on the welding wire rear outer tube fixing seat, a welding wire soft outer tube is sleeved on the welding wire rear outer tube, a groove body is arranged on the welding wire rear outer tube fixing seat, and the welding wire rear outer tube fixing seat is provided with a groove body. A laser switch button and a spring are arranged in the slot body, and a transfer hole is arranged on the slot body. A switch buckle mechanism is rotatably connected to the transfer hole. The switch buckle mechanism includes a buckle body, a transfer column and a limit column. The transfer column is rotatably connected to the transfer hole. A welding wire channel is arranged in the buckle body, and a swing sleeve is fixed in the welding wire channel. The transfer column and the limit column are arranged on both sides of the welding wire channel. The welding wire is arranged in the welding wire rear outer tube, the swing sleeve and the welding wire front outer tube.

[0007] As a preferred technical solution, a mounting groove is provided at the front end of the laser welding head body, a positioning tungsten tip is fixedly connected to the mounting groove, and a welding wire through hole is provided on the positioning tungsten tip.

[0008] As a preferred technical solution, the laser welding head body includes a shell, a laser channel is arranged in the shell, a reflector module is arranged at the corner of the shell, a rotating motor, a focusing mirror module and a protective mirror module are also arranged in the laser channel, and the focusing mirror module is connected to the rotating motor.

[0009] As a preferred technical solution, the reflector module includes a reflector fixing block and a reflector, the reflector fixing block is fixedly connected to the housing, and the reflector is arranged on the reflector fixing block.

[0010] As a preferred technical solution, the shell is further provided with an embedding groove, and the protective mirror module is embedded in the embedding groove and fixedly connected to the shell.

[0011] As a preferred technical solution, the rotating motor includes a motor body and a rotating shaft, the rotating shaft is a hollow rotating shaft, the focusing lens module includes a clamping ring, a first washer, a focusing lens, a second washer and a focusing lens barrel, the first washer, the focusing lens and the second washer are sequentially arranged in the focusing lens barrel and limited by the clamping ring, the clamping ring is fixedly connected to the focusing lens barrel, and the focusing lens barrel is connected to the hollow rotating shaft.

[0012] As a preferred technical solution, the focusing mirror is tilted relative to the focusing lens barrel, and the center line of the focusing mirror forms an angle with the center line of the focusing lens barrel.

[0013] Beneficial effects:

[0014] The present invention can avoid the welding wire and the molten pool from sticking together after welding is completed through the structural settings of the switch trigger mechanism, the swing sleeve and the laser switch button, and play the role of timely pulling the welding wire out of the molten pool when welding is stopped. In addition, the positioning tungsten tip can play a good welding positioning role and improve the welding accuracy. Due to the inclined setting of the focusing mirror and the focusing lens barrel, an equivalent large light spot can be formed in cooperation with the rotating motor, which expands the welding molten pool area and makes the welding effect of large welds better. It has the advantages of accurate positioning and expandable molten pool, and has the characteristics of high welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural explosion diagram of a laser wire welding machine;

[0016] Figure 2 for Figure 1 Structural explosion diagram of the main body of the laser welding head;

[0017] Figure 3 This is a structural assembly diagram of a laser wire feeding welding;

[0018] Figure 4 is a cross-sectional view of a laser wire welding machine;

[0019] Figure 5 It is a structural schematic diagram of the rear outer tube fixing seat of the welding wire;

[0020] Figure 6 It is a structural perspective view of the front outer tube of the welding wire and the switch trigger structure;

[0021] Figure 7 It is a cross-sectional view of the main body of the optical fiber head and the laser welding head;

[0022] Figure 8 for Figure 7 Detailed structural diagram of the rotating motor and focusing mirror module;

[0023] Fig. 9 A schematic diagram of the structure in which the center line B of the focusing lens and the center line C of the focusing lens barrel form an angle A;

[0024] Fig.10 It is a schematic diagram of the structure after laser offset;

[0025] Fig.11 It is a schematic diagram of the structure in which the laser is offset to another direction after the rotary motor rotates;

[0026] Fig.12 It is a schematic diagram of the principle that the light spot moves to form an equivalent large light spot after the rotating motor rotates;

[0027] Fig.13 This is a schematic diagram of the structure of the second embodiment of positioning the tungsten tip.

[0028] Figure ID:

[0029] 1. Optical fiber cable; 2. Optical fiber head; 3. Laser welding head body; 4. Front outer tube fixing seat of welding wire; 5. Rear outer tube fixing seat of welding wire; 6. Front outer tube of welding wire; 7. Rear outer tube of welding wire; 8. Soft outer tube of welding wire; 9. Slot body; 10. Laser switch button; 11. Spring; 12. Adapter hole; 13. Switch lever mechanism; 14. Latch body; 15. Adapter column; 16. Limit column; 17. Wire channel; 18. Swing sleeve; 19. Welding wire; 20. Installation slot; 21. Positioning tungsten tip; 22. Welding wire through hole; 23. Shell; 24. Laser channel; 25. Reflector module; 26. Rotating motor; 27. Focusing mirror module; 28. Protective mirror module; 29. ​​Reflector fixing block; 30. Reflector; 31. Motor body; 32. Rotating shaft; 33. Clamping ring; 34. First gasket; 35. Focusing mirror; 36. Second gasket; 37. Focusing lens barrel; 38. U-shaped groove; 100. Light spot; A. Angle; B. Center line of focusing mirror; C. Center line of focusing lens barrel. DETAILED DESCRIPTION

[0030] In order to further explain the technical solution of the present invention, a laser wire welding machine is clearly and completely explained below in conjunction with the accompanying drawings.

[0031] It should be noted that the terms such as "upper", "inner", "middle", "left", "right" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention, and it is necessary to make it clear in advance.

[0032] Please refer to the attached Figures 1 to 6The present invention provides a laser wire feeding welding machine, comprising a laser welding head body 3, an optical fiber head 2 and an optical fiber cable 1, wherein the optical fiber cable 1 is plugged and fixed to the laser welding head body 3 through the optical fiber head 2, and a welding wire front outer tube fixing seat 4 and a welding wire rear outer tube fixing seat 5 are arranged below the laser welding head body 3, a welding wire front outer tube 6 is fixed on the welding wire front outer tube fixing seat 4, a welding wire rear outer tube 7 is fixed on the welding wire rear outer tube fixing seat 5, a welding wire rear outer tube 7 is sleeved with a welding wire soft outer tube 8, a groove body 9 is arranged on the welding wire rear outer tube fixing seat 5, a laser switch button 10 and a spring 11 are arranged in the groove body 9, the laser switch button 10 can control the switch of the laser, and control the wire feeder to start or stop wire feeding, a transfer hole 12 is arranged on the groove body 9, and a switch buckle mechanism 13 is rotatably connected to the transfer hole 12, which needs to be It should be noted that since the laser switch button 10 and the spring 11 are both arranged in the groove body 9, and the switch trigger mechanism 13 is arranged on the groove body 9, when the switch trigger mechanism 13 is pressed, the switch trigger mechanism 13 can be sunk into the groove body 9 and abut against the laser switch button 10, and when the switch trigger mechanism 13 is released, due to the action of the spring 11, the switch trigger mechanism 13 can be bounced up and reset, the switch trigger mechanism 13 includes a trigger body 14, an adapter column 15 and a limit column 16, the adapter column 15 is rotatably connected to the adapter hole 12, a welding wire channel 17 is arranged in the trigger body 14, a swing sleeve 18 is fixed in the welding wire channel 17, the adapter column 15 and the limit column 16 are arranged on both sides of the welding wire channel 17, and welding wire 19 is arranged in the welding wire rear outer tube 7, the swing sleeve 18 and the welding wire front outer tube 6.

[0033] When working, please refer to the attached Figure 3As the operator pulls the switch trigger mechanism 13, the swing sleeve 18 also swings with the switch trigger mechanism 13, causing the swing sleeve 18 to move forward, causing the welding wire 19 to move forward. Since the switch trigger mechanism 13 is in a released state and a pressed state, there is a length difference between the welding wire 19 at the outlet of the swing sleeve 18 and the inlet of the front outer tube 6 of the welding wire, that is, when the switch trigger mechanism 13 is pressed down, the length of the welding wire 19 between the outlet of the swing sleeve 18 and the inlet of the front outer tube 6 of the welding wire is shorter, and when the switch trigger mechanism 13 is released, the length of the welding wire 19 between the outlet of the swing sleeve 18 and the inlet of the front outer tube 6 of the welding wire is longer. This makes it possible for the welding wire 19 to move forward relatively into the front outer tube 6 of the welding wire when the switch trigger mechanism 13 is pressed down, so that the welding wire 19 is exposed at the front end of the front outer tube 6 of the welding wire. When the switch trigger mechanism 13 hits the laser switch button 10 and presses the button to turn on the laser, the welding wire 19 machine starts feeding the wire and enters the working state. When the laser is in the working state, the laser melts the welding wire 19 and the workpiece together; when the welding is finished, as the operator releases the switch trigger mechanism 13, the switch trigger mechanism 13 is bounced open by the spring 11, and when the switch trigger mechanism 13 leaves the laser switch button 10, the welding wire 19 stops feeding the wire, but at this time, since the laser machine system has a delayed shutdown setting, when the laser switch button 10 is released, the laser will be delayed to shut down to avoid the molten pool from cooling, so as to avoid the welding wire 19 from sticking to the molten pool. As the switch trigger mechanism 13 continues to swing, the swing sleeve 18 swings toward the outside of the slot body 9 at the same time. Since the length of the welding wire 19 between the outlet of the swing sleeve 18 and the inlet of the front outer tube 6 of the welding wire gradually increases, the welding wire 19 also shrinks inwardly relative to the front outer tube 6 of the welding wire, so that the front end of the welding wire 19 is pulled out of the molten pool and retracts to the non-working state. At this time, the laser delay shutdown is also ended, the laser is turned off, and the welding process is completed, so as to avoid the welding wire 19 and the molten pool from sticking together.

[0034] Positioning tungsten tip 21 embodiment 1:

[0035] For details, please refer to the attached Figure 2 and attached Figure 5The front end of the laser welding head body 3 is provided with a mounting groove 20, a positioning tungsten tip 21 is fixedly connected to the mounting groove 20, and a welding wire through hole 22 is provided on the positioning tungsten tip 21. During laser wire feeding welding, the distance between the laser focus and the welding wire 19 and the weld must be within a certain range, so as to ensure stable welding and correct welding position. Therefore, a positioning device is required during welding, and the positioning tungsten tip 21 can meet the above requirements. The material of the positioning tungsten tip 21 is tungsten, which has the characteristics of high hardness and high melting point. The head of the positioning tungsten tip 21 is provided with a sharp corner, which can be used to slide along a small seam, thereby playing a positioning role during welding. At the same time, a welding wire through hole 22 is provided at the sharp corner to facilitate the insertion of the welding wire 19. The welding process usually includes flat seam welding, inner corner welding and outer corner welding. During work, the positions between the workpieces are arranged, and spot welding is performed at two or more positions to fix the relative positions of the workpieces. This method can avoid the sharp corner of the positioning tungsten tip 21 from stretching the parent material when it moves along the seam, and then welding is performed. During welding, the tip of the positioning tungsten tip 21 moves along the seam, so that the welding head moves while welding, so that the position is accurate and the welding effect is stable.

[0036] Positioning tungsten tip 21 embodiment 2:

[0037] For details, please refer to the attached Fig.13 The front end of the positioning laser welding head body 3 is provided with a mounting groove 20, a positioning tungsten tip 21 is fixed on the mounting groove 20, and a U-shaped groove 38 is also provided on the positioning tungsten tip 21; Fig.13 It can be seen that the welding wire 19 protrudes a little relative to the positioning tungsten tip 21, so that the welding wire 19 can be positioned by the positioning tungsten tip 21 and can contact the material to be welded. In this way, the wire feeding speed of the wire feeder can be used as an auxiliary to adjust the speed of hand movement during welding.

[0038] For details, please refer to the attached Figure 7 The laser welding head body 3 includes a shell 23, a laser channel 24 is arranged in the shell 23, a reflector module 25 is arranged at the corner of the shell 23, and a rotating motor 26, a focusing mirror module 27 and a protective mirror module 28 are also arranged in the laser channel 24, and the focusing mirror module 27 is connected to the rotating motor 26.

[0039] For details, please refer to the attached Figure 2 The reflector module 25 includes a reflector fixing block 29 and a reflector 30 . The reflector fixing block 29 is fixedly connected to the housing 23 , and the reflector 30 is disposed on the reflector fixing block 29 .

[0040] Specifically, the housing 23 is further provided with an embedding groove, and the protective mirror module 28 is embedded in the embedding groove and fixedly connected to the housing 23 .

[0041] For details, please refer to the attached Figure 8 The rotating motor 26 includes a motor body 31 and a rotating shaft 32, and the rotating shaft 32 is a hollow rotating shaft. The focusing lens module 27 includes a clamping ring 33, a first gasket 34, a focusing lens 35, a second gasket 36 and a focusing lens barrel 37. The first gasket 34, the focusing lens 35 and the second gasket 36 are sequentially arranged in the focusing lens barrel 37 and limited by the clamping ring 33. The clamping ring 33 is fixedly connected to the focusing lens barrel 37, and the focusing lens barrel 37 is connected to the hollow rotating shaft 32.

[0042] For details, please refer to the attached Fig. 9 The focusing mirror 35 is tilted relative to the focusing lens barrel 37, and the center line B of the focusing mirror forms an angle A with the center line C of the focusing lens barrel.

[0043] It should be noted that the tilted setting of the above-mentioned focusing mirror 35 can be achieved by setting a height difference on both sides of the first gasket 34 to form an inclined surface. The second gasket 36 is adapted to the first gasket 34, so that when the clamping ring 33 is fixed to the focusing lens barrel 37, the first gasket 34, the focusing mirror 35 and the second gasket 36 are fixed in the head of the focusing lens 35, and the focusing mirror 35 is close to the inclined surface to form the above-mentioned angle A. This angle A is actually equal to the angle formed by the center line of the inclined surface of the first gasket 34 and the horizontal direction. In actual production, the corresponding angle can be set according to the size of the laser outlet on the laser welding head body 3. The value of this angle A can be obtained through testing in combination with the laser outlet, and no detailed numerical limitation is made here.

[0044] Of course, the angle A can also be formed by simply setting the focusing lens barrel 37 as an inclined surface while the focusing lens 35 is not inclined, which will not be elaborated here.

[0045] As is known to all, the focusing mirror 35 can focus the laser, thereby concentrating the energy, melting the materials to be welded and the welding wire 19 during welding to form a specific molten pool, the molten metal fills the joint seam and condenses as the laser is removed, and the weld is thus formed. In actual operation, since the light spot 100 from the focusing mirror 35 is emitted from the center line and has a fixed diameter, the area of ​​the molten pool is relatively small, and the joint seam of the materials to be welded must be small, and the position of the light spot 100 must be accurately irradiated to meet the use requirements.

[0046] When the focusing lens 35 of the present invention is working, Fig.10 , 11As shown in 12, due to the existence of the above-mentioned angle A, when the rotating motor 26 rotates, the laser will not be emitted from the center line of the laser welding head body 3, but will be offset to the lower position as shown in the figure. As the rotating motor 26 rotates rapidly, the light spot 100 will rotate and offset with the rotating motor 26. When the laser irradiates the material, the laser heats the material. Although the light spot 100 will rotate with the rotation of the rotating motor 26, since the rotating motor 26 rotates very fast and the material dissipates heat slowly, it is equivalent to that the light spot 100 is always irradiating, which is equivalent to increasing the size of the light spot 100, which is consistent with the principle of point-to-surface. Therefore, the irradiation area is increased, and the molten pool is correspondingly increased, so that the welding effect of large welds is better.

[0047] The present invention is not limited to the above-mentioned embodiments. If various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, and if these modifications and variations fall within the scope of the claims of the present invention and equivalent technologies, the present invention also includes these modifications and variations.

Claims

1. A laser wire welding machine, characterized in that: The utility model comprises a laser welding head body, an optical fiber head and an optical fiber cable, wherein the optical fiber cable is plugged and fixed to the laser welding head body through the optical fiber head, a welding wire front outer tube fixing seat and a welding wire rear outer tube fixing seat are arranged below the laser welding head body, a welding wire front outer tube is fixed on the welding wire front outer tube fixing seat, a welding wire rear outer tube is fixed on the welding wire rear outer tube fixing seat, a welding wire soft outer tube is sleeved on the welding wire rear outer tube, a groove body is arranged on the welding wire rear outer tube fixing seat, a laser switch button and a spring are arranged in the groove body, a transfer hole is arranged on the groove body, a switch buckle mechanism is rotatably connected to the transfer hole, the switch buckle mechanism comprises a buckle body, a transfer column and a limit column, the transfer column is rotatably connected to the transfer hole, a welding wire channel is arranged in the buckle body, a swing sleeve is fixed in the welding wire channel, the transfer column and the limit column are arranged on both sides of the welding wire channel, and welding wire is arranged in the welding wire rear outer tube, the swing sleeve and the welding wire front outer tube.

2. The laser wire welding machine according to claim 1, characterized in that: The front end of the laser welding head body is provided with a mounting groove, a positioning tungsten tip is fixedly connected to the mounting groove, and a welding wire through hole or a U-shaped groove is provided on the positioning tungsten tip.

3. The laser wire welding machine according to claim 1, characterized in that: The laser welding head body includes a shell, a laser channel is arranged in the shell, a reflector module is arranged at the corner of the shell, a rotating motor, a focusing mirror module and a protective mirror module are also arranged in the laser channel, and the focusing mirror module is connected to the rotating motor.

4. The laser wire welding machine according to claim 3, characterized in that: The reflector module comprises a reflector fixing block and a reflector. The reflector fixing block is fixedly connected to the housing, and the reflector is arranged on the reflector fixing block.

5. The laser wire welding machine according to claim 3, characterized in that: The shell is also provided with an embedding groove, and the protective mirror module is embedded in the embedding groove and fixedly connected to the shell.

6. The laser wire welding machine according to claim 3, characterized in that: The rotating motor includes a motor body and a rotating shaft, wherein the rotating shaft is a hollow rotating shaft, and the focusing lens module includes a clamping ring, a first gasket, a focusing lens, a second gasket and a focusing lens barrel, wherein the first gasket, the focusing lens and the second gasket are sequentially arranged in the focusing lens barrel and limited by the clamping ring, the clamping ring is fixedly connected to the focusing lens barrel, and the focusing lens barrel is connected to the hollow rotating shaft.

7. The laser wire welding machine according to claim 6, characterized in that: The focusing mirror is tilted relative to the focusing lens barrel, and the center line of the focusing mirror forms an angle with the center line of the focusing lens barrel.

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