Synchronous insertion type ultrasonic-assisted laser welding system

Abstract

The utility model relates to the technical field of welding systems, in particular to a synchronous plug-in type ultrasonic-assisted laser welding system which is arranged on a guide rail group and comprises a laser welding part and a welding head connecting part, the laser welding part is connected with the guide rail group through the welding head connecting part, and the welding head connecting part is connected with the laser welding part. The laser welding part is used for emitting laser and welding a welding part; through the acoustic streaming effect and the cavitation effect of ultrasonic waves generated by the ultrasonic generation part, the fluidity of a molten pool is improved, the grain structure is refined, the quality and stability of a welding joint are improved, the joint strength and the welding seam quality of metal material laser welding are improved, and a laser welding head and an ultrasonic variable-amplitude needle head are rotated to proper angles to adapt to welding seams of different shapes; ultrasonic welding and laser welding are effectively combined, a welding part is welded, the quality and stability of a welding joint are guaranteed, and the adaptability of the welding system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding system technical field especially for a kind of synchronous insertion type ultrasonic auxiliary laser welding system. BACKGROUND

[0002] Laser welding technology is widely used in metal processing field due to its efficient, accurate and strong adaptability, especially in the connection of composite materials. However, laser welding may face problems such as insufficient welding strength, coarse grain and welding defects in some cases, especially in the welding of metal matrix composites, which limits the wide application of laser welding technology.

[0003] The proposal of ultrasonic assisted welding technology is used to overcome the shortcomings of laser welding. By introducing high-frequency vibration and utilizing the acoustic streaming and cavitation effect of ultrasonic waves during the welding process, the fluidity of the molten pool can be improved, the grain structure can be refined, and the quality of the joint can be improved. However, the current technology has not fully realized the effective combination of ultrasonic waves and laser welding, which leads to the problem of unstable welding performance in practical application. Therefore, it is of great practical significance to provide a synchronous insertion type ultrasonic auxiliary laser welding system. SUMMARY

[0004] The main purpose of the utility model is to provide a synchronous insertion type ultrasonic auxiliary laser welding system to solve the problem of ineffective combination of ultrasonic waves and laser welding in related technology.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a synchronous insertion type ultrasonic auxiliary laser welding system is provided, which comprises: a sliding guide rail frame part, the sliding guide rail frame part comprises a support, a guide rail group and a guide rail frame control system, the guide rail group is arranged above the support, and the guide rail frame control system is used to drive the guide rail group to move along the X, Y and Z axis directions;

[0006] A fiber laser welding system is arranged on the guide rail group, the fiber laser welding system comprises a laser welding part and a welding head connecting part, the laser welding part is connected with the guide rail group through the welding head connecting part, and the laser welding part is used to emit laser and weld the welding piece;

[0007] An ultrasonic connecting arm part is fixedly connected with the welding head connecting part at one end and rotatably connected with an ultrasonic generating system at the other end;

[0008] The ultrasonic generating system comprises an ultrasonic generating part and a cylindrical fixing clamp, the ultrasonic generating part is used to generate ultrasonic waves, and through the acoustic streaming effect and cavitation effect of ultrasonic waves, the fluidity of the molten pool can be improved, and the grain structure can be refined, the ultrasonic generating part is slidably connected with the ultrasonic connecting arm part through the cylindrical fixing clamp.

[0009] The special fixture part is fixed above the support and is used for mounting the welding part.

[0010] Further, the sliding rail frame part further comprises an X-direction rail, two Y-direction rails, a Z-direction rail and a rail frame control system, the two Y-direction rails are fixed on the upper surface of the support on two opposite sides, the X-direction rail is slidably arranged on the two Y-direction rails at two ends, the Z-direction rail is slidably arranged on the X-direction rail, and the rail frame control system is arranged on the welding head connecting part.

[0011] Further, the welding head connecting part comprises a parameter setting terminal, a front connecting plate, a rotating shaft and a rear connecting plate, the parameter setting terminal is fixed on the front side of the rear connecting plate, the rotating shaft penetrates the parameter setting terminal and is rotationally connected with the parameter setting terminal, the rear end of the rotating shaft is rotationally connected with the rear connecting plate, and the front end is fixedly connected with the front connecting plate, and the rail frame control system is fixedly arranged on the lower end of the parameter setting terminal.

[0012] Further, the laser welding part comprises a fiber laser power supply, a laser welding head, a cooling device and a protective gas device, the cooling device is fixedly arranged on the front surface of the front connecting plate, the fiber laser power supply is fixedly arranged on the top end of the cooling device, the protective gas device is fixedly arranged on the bottom end of the cooling device, and the laser welding head is fixedly arranged on the bottom end of the protective gas device.

[0013] Further, the ultrasonic connecting arm part comprises a vertical connecting arm, a horizontal connecting arm and a pneumatic sliding table, the rear side of the vertical connecting arm is fixedly connected with the Z-direction rail, and the front side is fixedly connected with the rear connecting plate, one end of the horizontal connecting arm is fixedly connected with the vertical connecting arm, and the other end is rotationally connected with the pneumatic sliding table.

[0014] Further, the ultrasonic generating system comprises an ultrasonic generating power supply, an ultrasonic transducer, an ultrasonic amplitude-varying needle and a cylindrical fixing clamp, the ultrasonic generating power supply is fixedly arranged on the top of the ultrasonic transducer, the ultrasonic amplitude-varying needle is fixedly arranged on the bottom of the ultrasonic transducer, the ultrasonic generating power supply provides electric energy for the ultrasonic transducer, the ultrasonic transducer is used for generating ultrasonic waves, and the ultrasonic amplitude-varying needle is used for leading out the ultrasonic waves.

[0015] Further, the cylindrical fixing clamp is fixedly arranged on the outer circle of the ultrasonic transducer through bolts, and the cylindrical fixing clamp is slidably connected with the pneumatic sliding table.

[0016] Further, the special fixture part comprises two upper copper backing plates, a lower copper backing plate and a weld pool, the lower copper backing plate is fixedly arranged on the upper surface of the support, the two upper copper backing plates are fixedly arranged on the upper surface of the lower copper backing plate on two opposite sides and are used for placing the welding part, and the weld pool is located on the upper surface of the lower copper backing plate and between the two upper copper backing plates.

[0017] Compared with the prior art, this utility model has the following beneficial effects: the ultrasonic waves generated by the ultrasonic generator improve the fluidity of the molten pool, refine the grain structure, and enhance the quality and stability of the welded joint. It also improves the joint strength and weld quality of laser welding of metal materials. The guide rail assembly can move along the X, Y, and Z axes, driving the fiber laser welding system and the ultrasonic generator system to a suitable position. The rotating shaft drives the laser welding head to rotate, and the pneumatic slide table drives the ultrasonic amplitude-modulating needle to rotate, turning the laser welding head and the ultrasonic amplitude-modulating needle to a suitable angle to adapt to welds of different shapes. This effectively combines ultrasonic waves and laser welding to weld the workpiece, ensuring the quality and stability of the welded joint and improving the adaptability of the welding system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0019] Figure 2 This is a schematic diagram of the sliding guide rail frame structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the laser welding part of this utility model;

[0021] Figure 4 This is a schematic diagram of the ultrasonic generating system of this utility model;

[0022] Figure 5 This is a schematic diagram of the ultrasonic connecting arm structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the special fixture part of this utility model.

[0024] Illustration:

[0025] 1. Fiber laser welding system; 11. Fiber laser power supply; 12. Laser welding head; 13. Cooling device; 14. Shielding gas device; 16. Front connecting plate; 18. Rear connecting plate;

[0026] 2. Ultrasonic generating system; 21. Ultrasonic power supply; 22. Ultrasonic transducer; 23. Ultrasonic amplitude-modulating needle; 24. Cylindrical fixing clamp;

[0027] 3. Sliding guide rail frame; 31. X-axis guide rail; 32. Y-axis guide rail; 33. Z-axis guide rail; 34. Support;

[0028] 4. Ultrasonic connecting arm; 41. Vertical connecting arm; 42. Horizontal connecting arm; 43. Pneumatic slide;

[0029] 5. Special fixture section; 51. Upper copper backing plate; 52. Lower copper backing plate; 53. Weld pool;

[0030] 6, welding piece. DETAILED DESCRIPTION

[0031] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0032] Please refer to Figures 1 to 6 The embodiment provides a synchronous insertion type ultrasonic auxiliary laser welding system, which comprises a sliding guide rail frame part 3, the sliding guide rail frame part 3 comprises a support 34, a guide rail set and a guide rail frame control system, the guide rail set is arranged above the support 34, and the guide rail frame control system is used for driving the guide rail set to move along the X, Y and Z axis directions.

[0033] The fiber laser welding system 1 is arranged on the guide rail set, the fiber laser welding system 1 comprises a laser welding part and a welding head connecting part, the laser welding part is connected with the guide rail set through the welding head connecting part, and the laser welding part is used for emitting laser and welding the welding piece 6.

[0034] The ultrasonic connecting arm part 4 is fixedly connected with the welding head connecting part at one end and rotationally connected with the ultrasonic generating system 2 at the other end.

[0035] The ultrasonic generating system 2 comprises an ultrasonic generating part and a cylindrical fixing clamp 24, the ultrasonic generating part is used for generating ultrasonic waves, the flowability of a molten pool is improved, and the grain structure is refined through the acoustic streaming effect and cavitation effect of the ultrasonic waves, and the ultrasonic generating part is slidably connected with the ultrasonic connecting arm part 4 through the cylindrical fixing clamp 24.

[0036] The special fixture part 5 is fixedly arranged above the support 34 and used for mounting the welding piece 6.

[0037] The sliding guide rail frame part 3 further comprises an X-direction guide rail 31, two Y-direction guide rails 32, a Z-direction guide rail 33 and a guide rail frame control system, the two Y-direction guide rails 32 are both fixedly arranged on the upper surface of the support 34 on two opposite sides, the X-direction guide rail 31 is slidably arranged on the two Y-direction guide rails 32 at both ends, the Z-direction guide rail 33 is slidably arranged on the X-direction guide rail 31, and the guide rail frame control system is arranged on the welding head connecting part.

[0038] The welding head connecting part comprises a parameter setting terminal, a front connecting plate 16, a rotating shaft and a rear connecting plate 18, the parameter setting terminal is fixedly arranged on the front side of the rear connecting plate 18, the rotating shaft penetrates through the parameter setting terminal and is rotationally connected with the parameter setting terminal, the rear end of the rotating shaft is rotationally connected with the rear connecting plate 18, the front end is fixedly connected with the front connecting plate 16, and the guide rail frame control system is fixedly arranged on the lower end of the parameter setting terminal.

[0039] The laser welding part includes a fiber laser power supply 11, a laser welding head 12, a cooling device 13 and a protective gas device 14. The cooling device 13 is fixedly arranged on the front surface of the front connecting plate 16, the fiber laser power supply 11 is fixedly arranged on the top end of the cooling device 13, the protective gas device 14 is fixedly arranged on the bottom end of the cooling device 13, and the laser welding head 12 is fixedly arranged on the bottom end of the protective gas device 14. The cooling device 13 cools the laser welding head 12, and the protective gas device 14 protects the welding piece 6 from the atmosphere and prevents the splashing generated in the welding process from damaging the laser lens.

[0040] The ultrasonic connecting arm part 4 includes a vertical connecting arm 41, a horizontal connecting arm 42 and a pneumatic sliding table 43. The rear side of the vertical connecting arm 41 is fixedly connected with the Z-direction guide rail 33, and the front side is fixedly connected with the rear connecting plate 18. One end of the horizontal connecting arm 42 is fixedly connected with the vertical connecting arm 41, and the other end is rotationally connected with the pneumatic sliding table 43. The ultrasonic connecting arm part 4 is made of aluminum alloy to reduce the weight of the device.

[0041] The ultrasonic generating system 2 includes an ultrasonic generating power supply 21, an ultrasonic transducer 22, an ultrasonic amplitude needle head 23 and a cylindrical fixing clamp 24. The ultrasonic generating power supply 21 is fixedly arranged on the top of the ultrasonic transducer 22, and the ultrasonic amplitude needle head 23 is fixedly arranged on the bottom of the ultrasonic transducer 22. The ultrasonic generating power supply 21 provides electric energy for the ultrasonic transducer 22, the ultrasonic transducer 22 is used for generating ultrasonic waves, and the ultrasonic amplitude needle head 23 guides the ultrasonic waves out.

[0042] The cylindrical fixing clamp 24 is fixedly arranged on the outer circle of the ultrasonic transducer 22 by means of bolts, and is slidably connected with the pneumatic sliding table 43.

[0043] The special fixture part 5 includes two upper copper pads 51, a lower copper pad 52 and a weld pool 53. The lower copper pad 52 is fixedly arranged on the upper surface of the support 34, and the two upper copper pads 51 are fixedly arranged on the upper surface of the lower copper pad 52 on both sides. The two upper copper pads 51 are used for placing the welding piece 6, so that a certain gap is left between the welding piece 6 and the lower copper pad 52, which is beneficial to heat dissipation. The weld pool 53 is located on the upper surface of the lower copper pad 52 and between the two upper copper pads 51.

[0044] The tip of the ultrasonic amplitude needle head 23 acts on the weld pool 53 at a distance of 10-30 mm from the center of the weld pool 53. The relative position between the tip and the laser beam is kept unchanged during the welding process. The ultrasonic transducer 22 is connected with the ultrasonic generating power supply 21. The electric signal emitted by the ultrasonic generating power supply 21 is converted into ultrasonic frequency sound flow action and cavitation action by the ultrasonic transducer 22, so as to transmit the ultrasonic field to the weld pool 53.

[0045] The surface of the welding piece 6 is polished to remove the oxide film until the metal luster is exposed, and the surface of the welding piece 6 and the butt joint edge are polished again with 200 mesh sandpaper to eliminate the local undulation of the surface caused by the polishing of the grinding machine, so that the surface of the welding piece 6 and the butt joint edge are smooth and flat. The butt joint edge and the welding surface are wiped with industrial alcohol to remove the oil stains on the surface of the welding piece 6; the treated welding piece 6 is placed on the designed upper copper backing plate 51, the butt joint gap is adjusted to be not more than 0.2 mm, and the welding piece 6 is fixed on the upper copper backing plate 51 through the screw, and the welding piece 6 is fastened in the middle position of the special fixture part 5; the X-direction guide rail 31 is controlled to slide forward and backward along the Y-direction guide rail 32, the Z-direction guide rail 33 is controlled to slide left and right along the X-direction guide rail 31, and the optical fiber laser welding system 1 is controlled to slide up and down along the Z-direction guide rail 33 through the guide rail frame control system, so that the optical fiber laser welding system 1 is moved to the appropriate position for welding, and then the rotating shaft is rotated around the center through the guide rail frame control system, the rotating shaft drives the laser welding head to rotate through the front connecting plate 16, so that it is rotated to the appropriate angle, the laser emitted by the laser welding head 12 is adjusted through the parameter setting terminal, so that the laser beam is focused on the surface of the welding piece 6, and the focal point is located at the welding position, the positions of the horizontal connecting arm 42 and the pneumatic sliding table 43 are adjusted, so that the ultrasonic amplitude needle head 23 is 10-30 mm away from the laser beam in the X direction, and the Y and Z directions are consistent with the position of the laser beam, the welding path is set through the parameter setting terminal, including the welding starting point, the welding termination point and the post-welding ultrasonic amplitude needle head 23 exit point, and the welding track is demonstrated by using the guide rail frame control system; the laser welding parameters and the ultrasonic generation parameters are set, the protection gas device 14 is turned on, the ultrasonic generation power supply 21 is turned on, the optical fiber laser power supply 11 is turned on by using the guide rail frame control system, the ultrasonic wave generated by the ultrasonic generation system 2 acts on the welding pool 53 first, the optical fiber laser welding system 1 emits laser after 3-5 seconds, and the sliding guide rail frame part 3 starts the welding process according to the pre-demonstrated welding track, the sliding guide rail frame part 3 moves to the welding termination point position, the optical fiber laser power supply 11 is turned off, the pneumatic sliding table 43 drives the ultrasonic amplitude needle head 23 to move to the post-welding exit point, which is set at a position 30-50 mm away from the connecting arm axis to avoid the bonding of the tip of the ultrasonic amplitude needle head 23 and the welding piece 6, and the welding process is ended.

[0046] In the above steps, the laser defocusing amount is -5~+5mm. In order to prevent the reflected laser on the surface of the welding piece 6 from damaging the light path of the laser head, the angle between the laser and the vertical direction is adjusted to 5°~10°. The welding track teaching point is the welding starting point, the welding termination point and the ultrasonic needle head exit point after welding. The connecting arm is adjusted so that the X direction of the ultrasonic amplitude needle head 23 is parallel to the welding direction, the Y direction is perpendicular to the welding direction, and the Z direction is parallel to the normal direction of the welding piece 6. The angle between the ultrasonic amplitude needle head 23 and the vertical direction is 40°~60°, and the tip of the ultrasonic amplitude needle head 23 is offset by 10~30mm relative to the X direction of the laser action point. The laser welding power is 2500~8000W, the welding speed is 3.5~5.5m / min, the type of protective gas is pure argon, and the protective gas flow is 10~25L / min. The ultrasonic frequency is 20kHz, and the ultrasonic power range is 40%~100%.

[0047] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiments with equivalent changes are still within the scope of the present application.

Claims

1. A simultaneous insert ultrasonic assisted laser welding system, characterized in that, The utility model relates to a kind of laser welding system, including: sliding guide rail frame part (3), the sliding guide rail frame part (3) includes support (34), guide rail group and guide rail frame control system, the guide rail group is located above support (34), the guide rail frame control system is used to drive guide rail group and move along X, Y, Z axis direction;Optical fiber laser welding system (1), the optical fiber laser welding system (1) is located on guide rail group, the optical fiber laser welding system (1) includes laser welding part and welding head connecting part, the laser welding part is connected with guide rail group by welding head connecting part, and the laser welding part is used to emit laser and weld welding piece (6);Ultrasonic connecting arm part (4), one end of the ultrasonic connecting arm part (4) is fixedly connected with welding head connecting part, and the other end is rotatably connected with ultrasonic generating system (2);Ultrasonic generating system (2), the ultrasonic generating system (2) includes ultrasonic generating part and barrel type fixed clamp (24), the ultrasonic generating part is used to generate ultrasonic wave, and the flowability of molten pool is improved by the acoustic streaming effect and cavitation effect of ultrasonic, and the grain structure is refined, and the ultrasonic generating part is slidably connected with ultrasonic connecting arm part (4) by barrel type fixed clamp (24);Special fixture part (5), the special fixture part (5) is fixedly arranged above support (34), and is used to install welding piece (6). The sliding guide rail frame part (3) further includes X-direction guide rail (31), two Y-direction guide rails (32), Z-direction guide rail (33) and guide rail frame control system, the two Y-direction guide rails (32) are both fixedly arranged on the upper surface of the support (34), the X-direction guide rail (31) is slidably arranged on the two Y-direction guide rails (32), the Z-direction guide rail (33) is slidably arranged on the X-direction guide rail (31), and the guide rail frame control system is arranged on the welding head connecting part. The welding head connecting part includes parameter setting terminal, front connecting plate (16), rotating shaft and rear connecting plate (18), the parameter setting terminal is fixedly arranged on the front side of the rear connecting plate (18), the rotating shaft penetrates the parameter setting terminal and is rotatably connected with the parameter setting terminal, the rear end of the rotating shaft is rotatably connected with the rear connecting plate (18), and the front end is fixedly connected with the front connecting plate (16), and the guide rail frame control system is fixedly arranged on the lower end of the parameter setting terminal. The laser welding part includes fiber laser power supply (11), laser welding head (12), cooling device (13) and protective gas device (14), the cooling device (13) is fixedly arranged on the front of the front connecting plate (16), the fiber laser power supply (11) is fixedly arranged on the top end of the cooling device (13), the protective gas device (14) is fixedly arranged on the bottom end of the cooling device (13), and the laser welding head (12) is fixedly arranged on the bottom end of the protective gas device (14). The ultrasonic connecting arm part (4) includes vertical connecting arm (41), horizontal connecting arm (42) and pneumatic sliding table (43), the rear side of the vertical connecting arm (41) is fixedly connected with the Z-direction guide rail (33), the front side is fixedly connected with the rear connecting plate (18), one end of the horizontal connecting arm (42) is fixedly connected with the vertical connecting arm (41), and the other end is rotatably connected with the pneumatic sliding table (43). ​ 2. The simultaneous insert ultrasonic assisted laser welding system of claim 1, wherein, ​ 3. The simultaneous insert ultrasonic assisted laser welding system of claim 2, wherein, ​ 4. The simultaneous insert ultrasonic assisted laser welding system of claim 3, wherein, ​ 5. The simultaneous insert ultrasonic assisted laser welding system of claim 3, wherein, ​ 6. The simultaneous insert ultrasonic assisted laser welding system of claim 5, wherein, The ultrasonic generating system (2) comprises an ultrasonic generating power supply (21), an ultrasonic transducer (22), an ultrasonic amplitude needle (23) and a cylindrical fixing clamp (24), the ultrasonic generating power supply (21) is fixed on the top of the ultrasonic transducer (22), the ultrasonic amplitude needle (23) is fixed on the bottom of the ultrasonic transducer (22), the ultrasonic generating power supply (21) provides electric energy for the ultrasonic transducer (22), the ultrasonic transducer (22) is used for generating ultrasonic waves, and the ultrasonic amplitude needle (23) leads out the ultrasonic waves.

7. The simultaneous insert ultrasonic assisted laser welding system of claim 6, wherein, The cylindrical fixing clamp (24) is fixed on the outer circle of the ultrasonic transducer (22) through bolts, and the cylindrical fixing clamp (24) is slidably connected with the pneumatic sliding table (43).

8. The simultaneous insert ultrasonic assisted laser welding system of claim 2, wherein, The special clamp part (5) comprises two upper copper backing plates (51), a lower copper backing plate (52) and a weld pool (53), the lower copper backing plate (52) is fixed on the upper surface of the support (34), the two upper copper backing plates (51) are both fixed on the two sides of the upper surface of the lower copper backing plate (52) and are used for placing the welding piece (6), and the weld pool (53) is located on the upper surface of the lower copper backing plate (52) and between the two upper copper backing plates (51).

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