Laser welding gun with welding seam tracking function

Abstract

The laser welding gun with the welding seam tracking function comprises a welding machine body, a lifter is installed on the welding machine body, a horizontal moving guide rail is installed on the lifter, a moving carrying frame is installed on the moving guide rail, a welding mechanism and a tracking mechanism are installed on the moving carrying frame at intervals, and the tracking mechanism comprises a second transverse moving air cylinder and a second hanging bracket. The upper end of the second hanging bracket is connected to the output end of the second transverse moving air cylinder, a telescopic reset assembly is installed at the lower end of the second hanging bracket, a first vertical tracking assembly is installed on the telescopic reset assembly, a vertical cylinder is installed in the first tracking assembly, and a second tracking assembly is installed in the vertical cylinder. The vertical cylinder is further provided with an obstacle crossing lifting assembly for regulating and controlling the second tracking assembly. By processing the condition of resistance or obstacles encountered by the second tracking assembly, the welding head can conduct continuous, efficient and stable welding seam tracking welding, and the real-time performance, the accuracy, the recognition precision, the welding effect and the welding quality of welding seam tracking are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a laser welding gun with a weld seam tracking function. Background Art

[0002] In the current field of industrial automation and intelligent manufacturing, laser welding technology is widely used in the connection of various metal materials due to its advantages of high precision, high efficiency and high flexibility. However, the real-time and accuracy of weld seam tracking in the welding process of traditional laser welding guns are still insufficient. For example, the recognition is not accurate enough, and the deviation in the welding process cannot be corrected in time, resulting in unstable welding quality and even welding defects. In addition, in actual applications, due to the influence of various factors, such as the uneven surface of the workpiece, thermal deformation during welding, etc., the real-time and accuracy of weld seam tracking are often difficult to guarantee.

[0003] Therefore, it is necessary to provide a laser welding gun with a weld seam tracking function to solve the problems raised in the above background technology. Summary of the invention

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a laser welding gun with a weld tracking function, comprising a welding body, a lifter is installed on the welding body, a horizontal movable guide rail is installed on the lifter, a movable carrier is installed on the movable guide rail, a welding mechanism and a tracking mechanism are installed on the movable carrier at intervals, the tracking mechanism comprises a transverse cylinder 2 and a hanger 2, the transverse cylinder 2 is horizontally installed on the movable carrier, the upper end of the hanger 2 is connected to the output end of the transverse cylinder 2, a telescopic reset component is installed at the lower end of the hanger 2, a vertical tracking component 1 is installed on the telescopic reset component, the tracking component 1 is used to record the trajectory along the outer side surface of the gap to be welded, a vertical cylinder is installed in the tracking component 1, a tracking component 2 is installed in the vertical cylinder, the tracking component 2 is used to record the trajectory of the gap to be welded, and an obstacle-crossing lifting component for regulating the tracking component 2 is also installed on the vertical cylinder.

[0005] Furthermore, the telescopic reset assembly has a telescopic direction that is consistent with the moving direction of the movable guide rail. The telescopic reset assembly includes a carrier sleeve and a slide rod. The carrier sleeve is provided with a slide hole at one end away from the welding mechanism. One end of the slide rod is fixed to the second phase of the hanger, and the other end of the slide rod slides through the slide hole, and the other end of the slide rod is connected to the side of the slide hole through a reset spring.

[0006] Furthermore, the tracking assembly includes a sliding sleeve and a sleeve seat, the sliding sleeve is fixed to the carrier sleeve, the sliding sleeve is slidably connected to the outer wall of the vertical cylinder, the sleeve seat is fixed to the lower end of the vertical cylinder, the sleeve seat and the sliding sleeve are connected through a conduction spring, a carrier ring is installed at the lower end of the sleeve seat through a suspension rod, and a protruding ball is installed on the ring surface of the carrier ring.

[0007] Furthermore, the tracking component 2 includes a probe, the upper end of the probe slides into the vertical cylinder cavity, and the upper end of the probe is connected to the upper end of the vertical cylinder cavity through a conductive spring 2, a ball 2 is installed at the lower end of the probe, and a uniform distribution of balls 3 is provided on the outer wall of the lower end of the probe, and the upper end of the probe is respectively provided with a circular card cavity and a through opening connected to the card cavity.

[0008] Furthermore, the obstacle-crossing lifting assembly includes a swivel and a support plate. The swivel is rotatably mounted on the upper end of the vertical cylinder. A lifting cylinder 2 pointing to the probe is mounted on the swivel. A block for cooperating with the through-port and the card cavity is mounted at the lower output end of the lifting cylinder 2. A motor is mounted on the support plate. A rotating wheel is mounted at the output end of the motor. The rotating wheel is connected to the swivel by a belt.

[0009] Furthermore, the lower end of the probe can extend into the gap of the gap to be welded or press against the gap surface of the gap to be welded.

[0010] Furthermore, the tracking mechanisms are arranged as two adjacent ones, and the two tracking mechanisms are respectively used to record the side wall tracks on both sides of the gap or respectively used to record the side edge tracks on both sides of the gap surface.

[0011] Furthermore, a buffer block for contacting the second hanger is installed on the carrier sleeve.

[0012] Furthermore, the welding mechanism includes a transverse cylinder and a hanger, wherein the transverse cylinder is horizontally installed on a movable carrier, the upper end of the hanger is connected to the output end of the transverse cylinder, a lifting cylinder is installed at a lower end of the hanger, a hanger is installed at a lower output end of the lifting cylinder, and a welding head is installed on the hanger.

[0013] Furthermore, the welding machine body is provided with a positioning and conveying platform for processing the plates to be welded.

[0014] Compared with the prior art, the present invention provides a laser welding gun with a weld seam tracking function, which has the following beneficial effects: In the present invention, through the structural design of tracking component one and tracking component two, the center lateral displacement variable trajectory and the secondary center lifting variable trajectory can be calculated and obtained, and transmitted to the lifting cylinder one in the welding mechanism, so that the lifting cylinder one controls the welding head and the gap to be welded to form a stable and optimal spacing distance, thereby improving the real-time, accuracy and recognition accuracy of weld tracking, improving the welding effect and welding quality of the welding head on the gap to be welded, and handling the resistance or obstacles encountered by the probe through the obstacle-crossing lifting component, so that the welding head can perform continuous, efficient and stable weld tracking welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a schematic diagram of the welding mechanism structure of the present invention; Figure 3 It is a schematic diagram of the tracking mechanism structure of the present invention; Figure 4 for Figure 3 Schematic diagram of partial cross-section structure; Figure 5 It is a schematic diagram of the structure of the telescopic reset assembly of the present invention; Figure 6 It is a schematic diagram of the sliding hole structure of the present invention; Figure 7 It is a schematic diagram of the card block structure of the present invention; Figure 8 It is a schematic diagram of the structure of the through port and the card cavity of the present invention; In the figure: 1, welding body; 2, lifter; 3, moving guide rail; 4, moving carrier; 5, welding mechanism; 6, tracking mechanism; 7, positioning conveyor; 51, traverse cylinder 1; 52, hanger 1; 53, lifting cylinder 1; 54, hanger; 55, welding head; 61, traverse cylinder 2; 62, hanger 2; 63, vertical cylinder; 64, telescopic reset assembly; 65, tracking assembly 1; 66, tracking assembly 2; 67, obstacle lifting assembly; 641, carrier sleeve; 642, slide rod; 643, Return spring; 644, buffer block; 6411, sliding hole; 651, sliding sleeve; 652, seat; 653, conduction spring 1; 654, suspension rod; 655, carrier ring; 656, ball 1; 661, probe; 662, ball 2; 663, ball 3; 664, conduction spring 2; 671, swivel; 672, lifting cylinder 2; 673, clamping block; 674, support plate; 675, motor; 676, rotating wheel; 677, belt; 6611, through port; 6612, clamping cavity. DETAILED DESCRIPTION

[0016] Reference Figure 1-Figure 8 The present invention provides a technical solution: a laser welding gun with a weld tracking function, comprising a welding body 1, a lifter 2 is installed on the welding body 1, a horizontal moving guide rail 3 is installed on the lifter 2, a moving carrier 4 is installed on the moving guide rail 3, a welding mechanism 5 and a tracking mechanism 6 are installed on the moving carrier 4 at intervals, the tracking mechanism 6 comprises a transverse cylinder 2 61 and a hanger 2 62, the transverse cylinder 2 61 is horizontally installed on the moving carrier 4, the upper end of the hanger 2 62 is connected to the output end of the transverse cylinder 2 61, a telescopic reset component 64 is installed at the lower end of the hanger 2 62, a vertical tracking component 1 65 is installed on the telescopic reset component 64, the tracking component 1 65 is used to record the trajectory along the outer side of the gap to be welded, a vertical cylinder 63 is installed in the tracking component 1 65, a tracking component 2 66 is installed in the vertical cylinder 63, the tracking component 2 66 is used to record the trajectory of the gap to be welded, and an obstacle-crossing lifting component 67 for regulating the tracking component 2 66 is also installed on the vertical cylinder 63.

[0017] In this embodiment, the telescopic reset component 64 has a telescopic direction that is consistent with the moving direction of the movable guide rail 3. The telescopic reset component 64 includes a carrier sleeve 641 and a slide rod 642. The end of the carrier sleeve 641 away from the welding mechanism 5 is provided with a slide hole 6411. One end of the slide rod 642 is fixed to the hanger 2 62, and the other end of the slide rod 642 slides through the slide hole 6411, and the other end of the slide rod 642 is connected to the side of the slide hole 6411 through a reset spring 643; that is, in the process of tracking welding of the gap to be welded, when the probe 661 in the tracking component 2 66 moves along the gap to be welded, if it encounters resistance or obstacles, the telescopic reset component 641 is retracted. The reset component 64 can be temporarily extended to facilitate the continuous welding of the welding mechanism 5 along the gap to be welded, thereby improving the quality of the gap to be welded; specifically, if resistance or obstacles are encountered, the hanger 2 62 still continues to move with the mobile carrier 4. At this time, the obstacle-crossing lifting component 67 is started to pull the probe 661, so that the probe 661 moves upward, reducing the resistance encountered by the probe 661 or crossing the obstacle. After completion, the probe 661 is reset by the obstacle-crossing lifting component 67, and the carrier sleeve 641 is reset by the reset spring 643, so that the probe 661 can once again cope with the subsequent problems encountered when moving along the gap to be welded.

[0018] In this embodiment, the tracking component 65 includes a sleeve 651 and a seat 652. The sleeve 651 is fixed to the carrier sleeve 641. The sleeve 651 is slidably connected to the outer wall of the vertical cylinder 63. The seat 652 is fixed to the lower end of the vertical cylinder 63. The seat 652 and the sleeve 651 are connected through a conduction spring 653. A carrier ring 655 is installed at the lower end of the seat 652 through a suspension rod 654. A protruding ball 656 is installed on the ring surface of the carrier ring 655. Specifically, the ball 656 is used to contact the local plate surface of the plate to be welded, and the lifting variable trajectory in this process is recorded through a conduction spring 653 so that the lifting cylinder 53 can adjust the height of the welding head 55.

[0019] In this embodiment, the tracking component 2 66 includes a probe 661, the upper end of the probe 661 slides into the cylinder cavity of the vertical cylinder 63, and the upper end of the probe 661 is connected to the upper end of the cylinder cavity of the vertical cylinder 63 through a conductive spring 2 664, and a ball 2 662 is installed at the lower end of the probe 661, and the outer side wall of the lower end of the probe 661 is evenly distributed with ball 3 663, and the upper end of the probe 661 is respectively provided with a circular card cavity 6612 and a through opening 6611 connected to the card cavity 6612; through the arrangement of ball 2 662 and ball 3 663, the probe 661 can move smoothly along the gap to be welded, so as to obtain an accurate, stable and continuous recording trajectory.

[0020] The obstacle-crossing and lifting assembly 67 in this embodiment includes a swivel 671 and a support plate 674. The swivel 671 is rotatably mounted on the upper end of the vertical cylinder 63. A lifting cylinder 672 pointing to the probe 661 is mounted on the swivel 671. A block 673 for penetrating the through-port 6611 and cooperating with the card cavity 6612 is mounted at the lower output end of the lifting cylinder 672. A motor 675 is mounted on the support plate 674. A rotating wheel 676 is mounted at the output end of the motor 675. The rotating wheel 676 is connected to the swivel 671 through a belt 677. Specifically, when the obstacle-crossing and lifting assembly 67 is started, the lifting cylinder 672 controls the block 673 to enter the card cavity 6612 through the through-port 6611, and then the motor 675 drives the rotating wheel 676 to drive the belt 677 for transmission. The belt 677 drives the swivel 671 and the lifting cylinder 672 to move. 72 rotates synchronously so that the block 673 is engaged with the cavity 6612, and then the block 673 is controlled by the lifting cylinder 672 to lift the probe 661. In this embodiment, as a preferred embodiment, the probe 661 is also provided with a pressure sensor for monitoring the resistance or obstacles encountered by the probe 661. The pressure sensor is used to monitor the horizontal lateral pressure value of the probe. Therefore, in the process of the lifting cylinder 672 lifting the probe 661, when the pressure sensor monitoring value is zero, it indicates that the resistance or obstacle encountered by the probe 661 disappears. At this time, the telescopic reset assembly 64 resets itself. At the same time, the lifting cylinder 672 is controlled to rotate so that the block 673 is aligned with the opening 6611, and then the block 673 is separated from the probe 661, thereby completing the processing of the resistance or obstacle encountered by the probe 661.

[0021] In this embodiment, the lower end of the probe 661 can extend into the gap of the gap to be welded or press against the gap surface of the gap to be welded; that is, when the gap width of the gap to be welded is greater than the diameter of the probe 661, the probe 661 extends into the gap of the gap to be welded, and the pressure condition of the probe 661 in contact with the side wall in the gap is fed back to the transverse cylinder 61, and the transverse cylinder 61 controls the probe 661 to contact the side wall in the gap in real time, and records the transverse variable trajectory of the transverse cylinder 61, and transmits the feedback to the transverse cylinder 61. The lifting and lowering variable trajectory in this process is recorded through the conduction spring 2 664, or when the gap width of the gap to be welded is smaller than the diameter of the probe 661, the probe 661 pushes against the side of the gap surface, and the pressure conditions between the probe 661 and the side of the gap surface are fed back to the transverse cylinder 2 61. The transverse cylinder 2 61 controls the probe 661 to contact the side of the gap surface in real time, and records the transverse variable trajectory of the transverse cylinder 2 61, and the lifting and lowering variable trajectory in this process is recorded through the conduction spring 2 664.

[0022] In this embodiment, the tracking mechanism 6 is set to be two adjacent ones, and the two tracking mechanisms 6 are respectively used to record the side wall trajectories on both sides of the gap or respectively used to record the side edge trajectories on both sides of the gap surface, so as to synchronously process the gap in the gap to be welded or the gap surface facing the gap to be welded; that is, so as to synchronously obtain the lateral variable trajectories of the two lateral cylinders 61 and the lifting variable trajectories recorded by the two conductive springs 664, perform mean calculation on the lateral variable trajectories of the two lateral cylinders 61, obtain the central lateral variable trajectory, and send it to the welding machine. The transverse cylinder 51 in the welding mechanism 5 is fed back to adjust the welding head 55 to track and move along the central transverse variable trajectory, and the lifting and lowering variable trajectories recorded by the two conductive springs 664 are averaged to obtain a primary central lifting and lowering variable trajectory, and then averaged with the lifting and lowering variable trajectories recorded in this process by the conductive spring 653 to obtain a secondary central lifting and lowering variable trajectory, which is transmitted to the lifting cylinder 53 in the welding mechanism 5, so that the lifting cylinder 53 controls the welding head 55 to form a stable and optimal spacing distance with the gap to be welded, thereby improving the welding effect of the welding head 55 on the gap to be welded.

[0023] In this embodiment, a buffer block 644 for contacting the second hanger 62 is installed on the carrier sleeve 641 to facilitate fast and smooth contact between the carrier sleeve 641 and the second hanger 62.

[0024] In this embodiment, the welding mechanism 5 includes a transverse cylinder 51 and a hanger 52. The transverse cylinder 51 is horizontally installed on the movable carrier 4. The upper end of the hanger 52 is connected to the output end of the transverse cylinder 51. The lower end of the hanger 52 is installed with a lifting cylinder 53. The lower output end of the lifting cylinder 53 is installed with a hanger 54, and the hanger 54 is installed with a welding head 55.

[0025] In this embodiment, the welding machine body 1 is provided with a positioning and conveying table 7 for processing the plate to be welded; that is, the plate to be welded can be transported and moved by the positioning and conveying table 7, and the movement of the movable carrier 4 can also be regulated by the movable guide rail 3. That is to say, for longer plates to be welded, they can be regulated by the positioning and conveying table 7, and for shorter plates to be welded, they can be regulated by the movable guide rail 3, which is beneficial to the tracking welding of the weld gap of the plate to be welded by the welding mechanism 5 and the tracking mechanism 6, thereby improving the welding efficiency of the weld gap.

[0026] In the specific implementation, the plate to be welded is placed on the positioning and conveying table 7, and the processing method of the probe 661 to be welded is selected, that is, the two probes 661 are respectively used to record the trajectories of the side walls on both sides of the gap or are respectively used to record the trajectories of the side edges on the surface of the gap, and the positioning and conveying table 7 or the movable guide rail 3 is selected for regulation, so that the tracking mechanism 6 and the welding mechanism 5 move synchronously along the gap to be welded, and the center lateral displacement variable trajectory and the secondary center lifting variable trajectory are calculated and obtained, and transmitted to the lifting cylinder 53 in the welding mechanism 5, so that the lifting cylinder 53 controls the welding head 55 to form a stable and optimal spacing distance between the gap to be welded, wherein the resistance or obstacle encountered by the probe 661 is processed by the obstacle lifting component 67, so that the welding head 55 can perform continuous, efficient and stable weld tracking welding.

[0027] The above description is only a preferred specific implementation manner of the invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser welding gun with a weld seam tracking function, comprising a welding body (1), characterized in that: The welding machine body (1) is provided with a lifter (2), a horizontal movable guide rail (3) is provided on the lifter (2), a movable carrier (4) is provided on the movable guide rail (3), a welding mechanism (5) and a tracking mechanism (6) are provided on the movable carrier (4) at intervals, the tracking mechanism (6) comprises a second transverse cylinder (61) and a second hanger (62), the second transverse cylinder (61) is horizontally provided on the movable carrier (4), the upper end of the second hanger (62) is connected to the output end of the second transverse cylinder (61), and the welding mechanism (5) and the tracking mechanism (6) are provided on the movable carrier (4) at intervals. A telescopic reset assembly (64) is installed at the lower end of the frame 2 (62), and a vertical tracking assembly 1 (65) is installed on the telescopic reset assembly (64). The tracking assembly 1 (65) is used to record the trajectory along the outer side surface of the gap to be welded. A vertical cylinder (63) is installed in the tracking assembly 1 (65), and a tracking assembly 2 (66) is installed in the vertical cylinder (63). The tracking assembly 2 (66) is used to record the trajectory of the gap to be welded. The vertical cylinder (63) is also installed with an obstacle-crossing lifting assembly (67) for regulating the tracking assembly 2 (66).

2. A laser welding gun with weld seam tracking function according to claim 1, characterized in that: The telescopic reset component (64) has a telescopic direction that is consistent with the moving direction of the movable guide rail (3). The telescopic reset component (64) comprises a carrier sleeve (641) and a slide rod (642). The end of the carrier sleeve (641) away from the welding mechanism (5) is provided with a slide hole (6411). One end of the slide rod (642) is fixed to the second hanger (62), and the other end of the slide rod (642) slides through the slide hole (6411). The other end of the slide rod (642) is connected to the side of the slide hole (6411) via a reset spring (643).

3. A laser welding gun with weld seam tracking function according to claim 2, characterized in that: The tracking assembly (65) comprises a sliding sleeve (651) and a sleeve seat (652), wherein the sliding sleeve (651) is fixed to the carrier sleeve (641), the sliding sleeve (651) is slidably connected to the outer wall of the vertical cylinder (63), the sleeve seat (652) is fixed to the lower end of the vertical cylinder (63), the sleeve seat (652) and the sliding sleeve (651) are connected via a conductive spring (653), a carrier ring (655) is installed at the lower end of the sleeve seat (652) via a suspension rod (654), and a protruding ball (656) is installed on the annular surface of the carrier ring (655).

4. A laser welding gun with weld seam tracking function according to claim 3, characterized in that: The second tracking component (66) comprises a probe (661), the upper end of which slides into the cylinder cavity of the vertical cylinder (63), and the upper end of the probe (661) is connected to the upper end of the cylinder cavity of the vertical cylinder (63) via a second conductive spring (664), a second ball (662) is installed at the lower end of the probe (661), and a third ball (663) is evenly distributed on the outer wall of the lower end of the probe (661), and a circular clamping cavity (6612) and a through hole (6611) communicating with the clamping cavity (6612) are respectively provided at the upper end of the probe (661).

5. The laser welding gun with weld seam tracking function according to claim 4, characterized in that: The obstacle-crossing lifting assembly (67) comprises a swivel (671) and a support plate (674). The swivel (671) is rotatably mounted on the upper end of the vertical cylinder (63). A lifting cylinder (672) pointing to the probe (661) is mounted on the swivel (671). A clamping block (673) for cooperating with the through-hole (6611) and the clamping cavity (6612) is mounted at the lower output end of the lifting cylinder (672). A motor (675) is mounted on the support plate (674). A rotating wheel (676) is mounted at the output end of the motor (675). The rotating wheel (676) is connected to the swivel (671) via a belt (677).

6. The laser welding gun with weld seam tracking function according to claim 4, characterized in that: The lower end of the probe (661) can extend into the gap of the gap to be welded or press against the gap surface of the gap to be welded.

7. The laser welding gun with weld seam tracking function according to claim 6, characterized in that: The tracking mechanisms (6) are arranged as two adjacent tracking mechanisms (6), and the two tracking mechanisms (6) are respectively used to record the side wall tracks on both sides of the gap or respectively used to record the side edge tracks on both sides of the gap surface.

8. The laser welding gun with weld seam tracking function according to claim 2, characterized in that: The carrier sleeve (641) is provided with a buffer block (644) for contacting the second hanger (62).

9. The laser welding gun with weld seam tracking function according to claim 1, characterized in that: The welding mechanism (5) comprises a transverse cylinder (51) and a hanger (52), wherein the transverse cylinder (51) is horizontally mounted on a movable carrier (4), the upper end of the hanger (52) is connected to the output end of the transverse cylinder (51), the lower end of the hanger (52) is mounted with a lifting cylinder (53), the lower output end of the lifting cylinder (53) is mounted with a hanger (54), and the hanger (54) is mounted with a welding head (55).

10. The laser welding gun with weld seam tracking function according to claim 1, characterized in that: The welding machine body (1) is provided with a positioning and conveying platform (7) for processing the plate to be welded.

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