A dual station laser welding apparatus

Abstract

This application relates to a dual-station laser welding equipment, belonging to the field of laser welding technology. It includes a support frame and a working platform on top of the support frame. On the working platform, two workstations are respectively provided with support seats and clamping and positioning components from bottom to top. A palm arm segment is placed on the support seat. The power output end of the clamping and positioning component is used to abut against the top wall of the palm segment. A tooling fixture is provided on each workstation. When closed, the tooling fixture is used to seal the welding gap between the palm segment and the palm arm segment. The tooling fixture has multiple air jets facing the welding gap. Air jets are connected to an air supply pump. Multiple sets of auxiliary positioning components are hinged to the support seat. These auxiliary positioning components are evenly distributed along the circumference of the support seat. The bottom end of each auxiliary positioning component faces the welding gap. The top end of each auxiliary positioning component is a telescopic end, which abuts against the inner wall of the palm segment. This application uses a dual-station structure to improve the effective utilization rate of the equipment and improves the limiting accuracy of the welding gap through the auxiliary positioning components.

Description

Technical Field

[0001] This application relates to the field of laser welding technology, and in particular to a dual-station laser welding device. Background Technology

[0002] Laser welding is a welding method that uses a high-energy-density laser beam to irradiate the surface of a workpiece, causing the material to melt rapidly and form a permanent bond. Its core principle is the conversion of light energy into heat energy, achieving the melting and recrystallization of the material. Laser welding boasts advantages such as high efficiency, high precision, and a low heat-affected zone, and is currently widely used in fields such as new energy batteries, consumer electronics, automobile manufacturing, and semiconductor packaging.

[0003] Existing laser welding equipment mostly adopts a single-station structure, which can only complete the welding operation of a single workpiece at a time, resulting in long production cycles and low equipment utilization. Existing dual-station laser welding equipment mostly shares a set of hydraulic clamping cylinders and oil circuit systems, with the clamping actions of the two stations interfering with each other. It is impossible to independently adjust the clamping force of each station, making it difficult to adapt to the clamping requirements of different workpieces, and easily causing problems such as workpiece damage or loose clamping. In addition, the positioning accuracy of tooling fixtures and station switching is insufficient, which can easily lead to deviations in welding position and reduce the pass rate of welded products. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a dual-station laser welding device.

[0005] This application provides a dual-station laser welding device, which adopts the following technical solution: A dual-station laser welding device includes a support frame and a working platform mounted on top of the support frame. The working platform has two sets of stations. Each set of stations has a support base and a clamping and positioning assembly arranged sequentially from bottom to top. A palm arm segment is placed on the support base. The power output end of the clamping and positioning assembly is used to abut against the top wall of the palm segment. Each set of stations is equipped with a tooling fixture. When closed, the tooling fixture seals the welding gap between the palm segment and the arm segment. The tooling fixture has multiple air jets facing the welding gap. The air jets are connected to an air supply pump. Multiple sets of auxiliary positioning assemblies are hinged to the support base. The multiple sets of auxiliary positioning assemblies are evenly distributed along the circumference of the support base. The bottom end of each auxiliary positioning assembly faces the welding gap. The top end of each auxiliary positioning assembly is a telescopic end, which abuts against the inner wall of the palm segment.

[0006] By adopting the above technical solution, before laser welding, the palm arm section is placed on the support base, and the palm hand section is placed on top of the palm arm section. The clamping and positioning component is driven to achieve the initial positioning of the weld gap. The tooling fixture is clamped outside the weld gap of the palm, and the air pump is driven to spray gas from the nozzle. The high-pressure gas enters the weld gap. Under the action of the auxiliary positioning component, the top of the auxiliary positioning component applies a downward force to the palm hand section of the palm, causing the palm welding section to move down to achieve the positioning of the weld gap. The dual-station structure improves the effective utilization rate of the equipment and meets the clamping requirements of different stations. The setting of the auxiliary positioning component improves the limiting accuracy of the weld gap.

[0007] Preferably, the tooling fixture includes a cylinder, a pneumatic gripper, a rubber buffer pad, and multiple balls; the cylinder is mounted on the work platform, and the pneumatic gripper is connected to the power output end of the cylinder; rubber buffer pads are provided on the upper and lower parts of the inner wall of the gripper fingers of the pneumatic gripper, and the rubber buffer pads are fixedly connected along the circumference of the pneumatic gripper; multiple receiving grooves are formed on the inner wall of the upper rubber buffer pad; the multiple receiving grooves are evenly arranged along the length direction of the rubber buffer pad; and the multiple balls are embedded one-to-one in the multiple receiving grooves.

[0008] By adopting the above technical solution, before laser welding, the cylinder outputs power to drive the pneumatic gripper to open and move the pneumatic gripper to the outside of the palm weld gap. The cylinder outputs power to drive the pneumatic gripper to close. After the pneumatic gripper closes, multiple balls inside the gripper's fingers fit against the outer wall of the palm weld gap to clamp the palm weld gap. The rubber buffer pad and balls inside the tooling fixture facilitate the downward sliding of the palm section when the weld gap is limited.

[0009] Preferably, the auxiliary positioning assembly includes a bracket, a hinge shaft, a drive plate, a U-shaped spring, and a spring telescopic rod; the bracket is disposed on the top wall of the support base; both ends of the hinge shaft are rotatably connected to the bracket; one end of the drive plate is connected to the hinge shaft, and the other end extends radially downward along the hinge shaft; any side of the drive plate faces the weld gap; one end of the spring telescopic rod is connected to the hinge shaft; the telescopic end of the spring telescopic rod extends radially upward along the hinge shaft; one end of the U-shaped spring is connected to the drive plate, and the other end is connected to the bracket; the U-shaped spring is used to provide force for the drive plate to approach the weld gap.

[0010] By adopting the above technical solution, before laser welding, after the tooling fixture clamps the weld seam of the palm cylinder, air is blown into the palm cylinder through the air jet nozzle directly opposite the weld seam. The high-pressure airflow drives the drive plate in the auxiliary positioning assembly to rotate around the hinge axis inside the palm cylinder, thereby causing another spring telescopic rod on the hinge axis to rotate around the hinge axis outside the palm cylinder. The top of the spring telescopic rod has a downward frictional force that drives the palm section of the palm cylinder to move down, thus reducing the weld seam between the palm section and the arm section of the palm cylinder. After the weld seam is almost aligned, the gas no longer enters the tooling fixture through the air jet nozzle. Under the action of the U-shaped spring, the drive plate rotates around the hinge axis outside the palm cylinder, and the spring telescopic rod connected to the hinge axis rotates around the hinge axis outside the palm cylinder. The auxiliary positioning assembly returns to its original state.

[0011] Preferably, the telescopic end of the spring telescopic rod is connected to a rubber block.

[0012] By adopting the above technical solution, before laser welding, the tooling fixture holds the welding gap of the palm barrel. Under the action of the auxiliary positioning component, the rubber block connected to the top of the spring telescopic rod exerts a downward frictional force on the palm section of the palm barrel, driving the long palm section to move downward and complete the docking and positioning of the welding gap.

[0013] Preferably, the auxiliary positioning component further includes a counterweight and a limiting block; the counterweight is slidably mounted vertically on the bracket; the limiting block is slidably mounted horizontally on the bracket; the top wall of one end of the limiting block abuts against the bottom wall of the counterweight; a slider is hinged to the other end of the limiting block, and the slider is slidably connected vertically to the body of the spring telescopic rod.

[0014] By adopting the above technical solution, before laser welding, after the tooling fixture clamps the welding seam of the palm cylinder, air is blown into the palm cylinder through the air jet nozzle directly facing the welding seam. The high-pressure airflow drives the drive plate in the auxiliary positioning assembly to rotate around the hinge axis inside the palm cylinder. This rotation of the drive plate in the auxiliary positioning assembly around the hinge axis inside the palm cylinder causes another spring telescopic rod on the hinge axis to rotate around the hinge axis outside the palm cylinder. This drives the slider slidably connected inside the spring telescopic rod to slide, thereby causing the limiting block hinged to the slider to slide along the bracket to the outside of the palm cylinder. At this time, the end of the limiting block that abuts against the counterweight block disengages from the counterweight block, and the counterweight block no longer has a limiting function. Due to the constraint of the block, the counterweight slides downward along the support, and the counterweight simultaneously presses the spring telescopic rod downward, exerting a downward force on the rubber block connected to the top of the spring telescopic rod. The rubber block connected to the top of the spring telescopic rod exerts a downward frictional force on the palm section, driving the palm section to move downward, thus reducing the weld gap between the palm section and the arm section. After the weld gap is almost aligned, the air nozzle stops blowing air into the weld gap. Under the action of the U-shaped spring, the drive plate rotates around the hinge axis to the outside of the palm, and the spring telescopic rod connected to the hinge axis rotates around the hinge axis to the inside of the palm. The slider slides upward along the track on the spring telescopic rod, and the auxiliary positioning component returns to its original state.

[0015] Preferably, the top wall of the support base is provided with a reset frame; a reset rod is slidably mounted on the reset frame along the vertical direction; a pressure plate is provided on the top of the reset rod; the top edge of the pressure plate abuts against the inner wall of the palm section of the palm sleeve; a reset circular plate is coaxially mounted on the reset rod; the top wall of the reset circular plate abuts against or disengages from the limiting block; a reset spring is sleeved on the reset rod; the two ends of the reset spring are respectively connected to the reset circular plate and the reset frame; the reset spring is used to provide a vertically upward force to the reset circular plate.

[0016] By adopting the above technical solution, before laser welding, the palm arm section is placed on the support base. Before placing the palm arm section, the return spring is in its natural state, the counterweight abuts against the return circular plate, the U-shaped spring is in a compressed state, and the drive plate rotates around the hinge axis towards the inside of the palm, causing another spring telescopic rod on the hinge axis to rotate around the hinge axis towards the outside of the palm, driving the slider on the limit block to move down, thereby causing the limit block to move to the left. After placing the palm arm section, the palm arm section abuts against the pressure plate on the return frame, causing the return spring to be in a compressed state. The return circular plate leaves the counterweight, and under the rebound action of the U-shaped spring, the auxiliary positioning component is in its original state, at which time the limit block abuts against the counterweight. After the tooling fixture holds the welding gap of the palm, air is blown into the palm through the air jet nozzle directly opposite the welding gap. The high-pressure airflow blows the drive plate in the auxiliary positioning component of the drive plate to rotate around the hinge axis towards the inside of the palm, thereby causing another spring telescopic rod on the hinge axis to rotate around the hinge axis towards the outside of the palm. The vertical sliding connection is on the spring extension... The slider inside the telescopic rod slides downward along its corresponding track, causing the limiting block hinged to the slider to slide outward along the bracket towards the palm barrel. At this time, the end of the limiting block that abuts against the counterweight block disengages from the counterweight block. Without the limitation of the limiting block, the counterweight block slides downward along the bracket. The counterweight block simultaneously presses the spring telescopic rod downward, exerting a downward force on the rubber block connected to the top of the spring telescopic rod. The rubber block connected to the top of the spring telescopic rod exerts a downward frictional force on the palm section of the palm barrel, driving the palm section of the palm barrel to move downward, thus reducing the weld gap between the palm section and the arm section of the palm barrel. After the weld gap is limited and almost aligned, the gas no longer enters the tooling fixture through the air jet. The tooling fixture is removed, the weld gap is welded, the welding is completed, and the palm barrel is removed. The pressure plate on the return spring is no longer under the pressure of the palm barrel, the return spring returns to its natural state, the return plate slides vertically upward along the return rod, pushing the counterweight block to slide vertically upward along the bracket, the return spring returns to its original state, and the auxiliary positioning component also returns to its state before use.

[0017] Preferably, the clamping and positioning assembly includes a hydraulic cylinder and a piston rod slidably inserted into the hydraulic cylinder; four support columns are provided on the working platform, and the top ends of the four support columns are fixedly connected to a top plate; the hydraulic cylinder is fixedly installed above the top plate, and the piston rod slides downward through the top plate; a clamping buffer pad is fixedly connected to the bottom end of the piston rod.

[0018] By adopting the above technical solution, before laser welding, the initial limiting rod is adjusted to adjust the clamping buffer pad to a suitable height, the palm arm section is placed on the support seat, and then the palm section is placed between the clamping buffer pad and the long arm section; the height of the piston rod in the hydraulic cylinder is adjusted to adjust the height of the clamping buffer pad so that the clamping buffer pad abuts against the top wall of the palm section.

[0019] Preferably, a lifting guide plate is fixedly connected to the piston rod; a support plate is provided on the support base; vertical guide columns are provided on both sides of the workstation; the bottom end of the vertical guide column is fixedly connected to the work platform; and the top end of the vertical guide column passes through the support plate and the lifting guide plate sequentially and is then fixedly connected to the top plate.

[0020] By adopting the above technical solution, before laser welding, the initial limiting rod is adjusted to adjust the clamping buffer block to a suitable height. The palm arm section is placed on the support base, and the top wall of the reset frame abuts against the inner wall of the palm section. Then, the palm section is placed between the clamping buffer block and the palm arm section. The height of the clamping buffer block is adjusted by adjusting the height of the piston rod in the hydraulic cylinder, so that the clamping buffer block abuts against the top wall of the palm section. During this process, the lifting guide plate slides vertically downward along the lifting guide column, thereby achieving vertical limiting of the welding gap and preventing the palm from shifting.

[0021] Preferably, the bottom end of the piston rod is rotatably connected to the clamping buffer pad; a bracket is fixedly connected to the lower surface of the working platform; a motor is fixedly connected to the bracket, and the power output shaft of the motor is coaxially fixedly connected to the support seat to drive the palm cylinder to rotate.

[0022] By adopting the above technical solution, before laser welding, the palm arm section is placed on the support base, and then the palm section is placed between the pressure buffer pad and the long arm section. The palm is adjusted to achieve positioning. During the welding process, the drive motor makes the palm placed on the support base rotate around the axis.

[0023] Preferably, a transverse slide rail is provided in front of the working platform, a welding bracket is slidably mounted on the transverse slide rail, a longitudinal slide rail is slidably mounted on the welding bracket, and a welding table is slidably mounted on the longitudinal slide rail. The welding table is used to place the laser welding head.

[0024] By adopting the above technical solution, before performing laser welding, the palm arm section is placed on the support base, and then the palm section is placed between the pressure buffer pad and the long arm section. The palm is adjusted to achieve positioning. The laser welding head is placed on the welding table, the position of the bracket in the transverse slide rail is adjusted, and the welding table is slid vertically along the bracket to adjust the position of the laser welding head on the welding table.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By adopting the above technical solution, before laser welding, the palm arm section is placed on the support base, and the palm hand section is placed on top of the palm arm section. The clamping and positioning component is driven to achieve the initial positioning of the weld gap. The tooling fixture is clamped outside the weld gap of the palm, and the air pump is driven to spray gas from the jet nozzle. The high-pressure gas enters the weld gap. Under the action of the auxiliary positioning component, the top of the auxiliary positioning component applies a downward force to the palm hand section, causing the palm welding section to move down to achieve the positioning of the weld gap. The dual-station structure improves the effective utilization rate of the equipment and meets the clamping requirements of different stations. The setting of the auxiliary positioning component improves the limiting accuracy of the weld gap.

[0026] 2. By adopting the above technical solution, before laser welding, the palm arm section is placed on the support base; before the palm section is placed, the return spring is in its natural state, the counterweight abuts against the return circular plate, the U-shaped spring is in a compressed state, the drive plate rotates around the hinge axis towards the inside of the palm, causing another spring telescopic rod on the hinge axis to rotate around the hinge axis towards the outside of the palm, driving the slider on the limit block to move down, thereby causing the limit block to move to the left; after the palm arm section is placed, the palm arm section abuts against the pressure plate on the return frame, causing the return spring to be in a compressed state; the return circular plate leaves the counterweight, and under the rebound action of the U-shaped spring, the auxiliary positioning component is in its original state, at which time the limit block abuts against the counterweight; after the tooling fixture holds the welding gap of the palm, air is blown into the palm through the air jet nozzle directly opposite the welding gap, and the high-pressure airflow blows the drive plate in the auxiliary positioning component of the drive plate to rotate around the hinge axis towards the inside of the palm, thereby causing another spring telescopic rod on the hinge axis to rotate around the hinge axis towards the outside of the palm; vertically sliding connection to the spring The slider inside the telescopic rod slides downward along its corresponding track, causing the limiting block hinged to the slider to slide along the bracket outward of the palm barrel. At this time, the end of the limiting block that abuts against the counterweight block disengages from the counterweight block. Without the limitation of the limiting block, the counterweight block slides downward along the bracket. The counterweight block simultaneously presses the spring telescopic rod downward, exerting a downward force on the rubber block connected to the top of the spring telescopic rod. The rubber block connected to the top of the spring telescopic rod exerts a downward frictional force on the palm section of the palm barrel, driving the palm section of the palm barrel to move downward, thus reducing the weld gap between the palm section and the arm section of the palm barrel. After the weld gap is limited and almost aligned, the gas no longer enters the tooling fixture through the air jet. The tooling fixture is removed, the weld gap is welded, the welding is completed, and the palm barrel is removed. The pressure plate on the return spring is no longer under the pressure of the palm barrel, the return spring returns to its natural state, the return plate slides vertically upward along the return rod, pushing the counterweight block to slide vertically upward along the bracket, the return spring returns to its original state, and the auxiliary positioning component also returns to its state before use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a dual-station laser welding device.

[0028] Figure 2 This is a schematic diagram of a dual-station laser welding equipment without the support frame and working platform.

[0029] Figure 3 This is a top view of the tooling fixture.

[0030] Figure 4 It is a side view sectional view of a tooling fixture in a certain state.

[0031] Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0032] Explanation of reference numerals in the attached drawings: 1. Support frame; 2. Working platform; 21. Support column; 22. Top plate; 23. Vertical guide column; 3. Support base; 31. Support plate; 32. Bracket platform; 33. Motor; 4. Clamping and positioning assembly; 41. Hydraulic cylinder; 42. Piston rod; 43. Lifting guide plate; 44. Clamping buffer pad; 5. Tooling fixture; 51. Air nozzle; 52. Air supply pump; 53. Cylinder; 54. Pneumatic gripper; 55. Rubber buffer pad 56. Ball bearing; 6. Auxiliary positioning component; 61. Bracket; 62. Hinge shaft; 63. Drive plate; 64. U-shaped spring; 65. Spring telescopic rod; 651. Rubber block; 66. Counterweight block; 67. Limiting block; 671. Slider; 68. Reset frame; 681. Reset rod; 682. Pressure plate; 683. Reset circular plate; 684. Reset spring; 71. Transverse slide rail; 72. Welding bracket; 73. Longitudinal slide rail; 74. Welding table. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0034] This application discloses a dual-station laser welding device. (Refer to...) Figures 1-5 It includes a support frame 1, a working platform 2, a support base 3, and a clamping and positioning component 4; the working platform 2 is fixedly connected to the bracket 61, and the working platform 2 has two sets of workstations; each set of workstations has a support base 3 and a clamping and positioning component 4 arranged from bottom to top; each set of workstations is equipped with a tooling fixture 5, the palm arm section is placed on the support base 3, and the power output end of the clamping and positioning component 4 is used to abut against the top wall of the palm section.

[0035] A rotating column is fixedly connected below the support base 3, and a motor 33 is fixedly connected below the rotating column. A support platform is fixedly installed on the base of the motor 33, and four columns are fixedly connected on the support platform. The tops of the four columns are all fixedly connected to the working platform 2. The output end of the motor 33 is fixedly connected to the rotating column coaxially, and the rotating shaft of the rotating column coincides with the shaft of the palm cylinder. A working hole is opened on the working platform 2, and the support base 3 passes through the working hole and is fixedly connected to the rotating column. The motor 33 drives the palm cylinder on the support base 3 to rotate by driving the rotating shaft to rotate coaxially.

[0036] The support base 3 includes a base and a positioning mold. The positioning mold is detachably threaded onto the top of the base. The base has a support base 3 with a hole. The base passes through the hole. The positioning mold has different specifications to adapt to different sizes of palm sleeves.

[0037] Four supporting columns 21 are symmetrically arranged on the working platform 2, and the top of the four supporting columns 21 are fixedly connected to the top plate 22. The clamping and positioning assembly 4 includes a hydraulic cylinder 41 and a piston rod 42. The piston rod 42 is slidably inserted into the hydraulic cylinder 41. The hydraulic cylinder 41 is fixedly connected above the top plate 22. The piston rod 42 slides downward through the top plate 22. The end of the piston rod 42 is rotatably connected to a clamping buffer pad 44. A lifting guide plate 43 is fixedly connected to the piston rod 42 between the top plate 22 and the clamping buffer pad 44. The piston rod 42 is slidably inserted into the hydraulic cylinder 41 to clamp the buffer pad 44 and abut against the top wall of the palm section of the palm sleeve.

[0038] Vertical guide columns 23 are provided on both sides of the workstation; the bottom end of the vertical guide column 23 is fixedly connected to the work platform 2, and the top end of the vertical guide column 23 passes through the support plate 31 and the lifting guide plate 43 in sequence and is fixedly connected to the top plate 22. The vertical guide column 23 and the lifting guide plate 43 are vertically slidably connected; the vertical guide column 23 is used for vertical positioning of the palm cylinder during the welding process.

[0039] Preliminary limiting posts are set on both sides of the workstation; the bottom end of the preliminary limiting post is fixedly connected to the support plate 31, and the top end of the preliminary limiting post extends upward through the lifting guide plate 43, which can slide vertically along the preliminary limiting post; a threaded section is set on the preliminary limiting post, and a positioning nut is slidably connected on the threaded section, which is located above the lifting guide plate 43; by adjusting the positioning nut on the threaded section, the positioning nut can prevent the lifting guide plate 43 from disengaging from the preliminary limiting post.

[0040] The work platform 2 is equipped with a horizontal rail, on which a welding bracket 72 is slidably connected. The welding bracket 72 is equipped with a vertical rail, on which a welding table is slidably connected. The welding table is used to hold the laser welding gun.

[0041] After closing, the fixture 5 is used to seal the weld gap between the palm section and the arm section of the palm barrel. The fixture 5 has multiple air nozzles 51 facing the weld gap, and the air nozzles 51 are connected to an air pump 52. The fixture 5 includes a cylinder 53, a pneumatic gripper 54, a rubber buffer pad 55, and multiple balls 56. The cylinder 53 is mounted on the work platform 2, and a pneumatic rod is slidably inserted into the cylinder 53. A drive mechanism is fixedly connected to the pneumatic gripper 54 of the drive mechanism. The pneumatic rod passes through... The pneumatic gripper 54 clamps and releases the palm cylinder via a drive mechanism. The pneumatic gripper 54 includes a gripping finger and an annular groove structure, with the annular groove structure fixedly connected to the upper and lower parts of the inner wall of the gripping finger. The annular groove structure is provided with a rubber buffer pad 55, which is fixedly connected circumferentially along the annular groove structure. Ball bearings 56 are arranged circumferentially along the inner wall of the rubber buffer pad 55 and are rotatably connected to the inner wall of the rubber buffer pad 55. After the pneumatic gripper 54 is closed, the multiple balls 56 inside the gripping finger are in contact with the outer wall of the palm cylinder.

[0042] Multiple sets of auxiliary positioning components 6 are hinged to the support base 3. These components are evenly distributed circumferentially around the support base 3. The bottom end of each auxiliary positioning component 6 faces the weld seam, and the top end is a telescopic end that abuts against the inner wall of the palm section of the palm sleeve. The main structure of the auxiliary positioning component 6 is as follows: it includes a bracket 61, a hinge shaft 62, a drive piece 63, a U-shaped spring, a spring telescopic piece, a counterweight 66, and a limiting block 67. The bracket 61 is mounted on the top wall of the support base 3. Both ends of the hinge shaft 62 are rotatably connected to the bracket 61. One side of the drive piece 63 faces the weld seam, one end of the drive piece 63 is connected to the hinge shaft 62, and the other end of the drive piece 63 rotates radially around the hinge shaft 62. Extending downwards; one end of the spring telescopic rod 65 is connected to the hinge shaft 62, and the telescopic end of the spring telescopic rod 65 extends radially upwards around the hinge shaft 62; a rubber block 651 is connected to the telescopic end of the spring telescopic rod 65, and a slider 671 is vertically slidably connected to the telescopic end of the spring telescopic rod 65; one end of the U-shaped spring sheet is connected to the drive plate 63, and the other end is connected to the bracket 61; the counterweight block 66 is slidably mounted on the bracket 61; one end of the limiting block 67 is hinged to the slider 671, and the other end slides laterally through the bracket 61; the top wall of one end of the limiting block 67 abuts against the bottom wall of the counterweight block 66; the air jet 51 on the tooling fixture 5 is directly opposite the welding gap, driving the drive plate 63 to rotate around the hinge shaft 62 to adjust the welding gap on the palm cylinder to achieve positioning.

[0043] The top wall of the support base 3 is also provided with a reset frame 68, and a reset rod 681 is provided vertically on the reset frame 68. A pressure plate 682 is provided on the top of the reset rod 681. The top edge of the pressure plate 682 abuts against the inner wall of the palm section of the palm sleeve. A reset circular plate 683 is provided on the reset rod 681. The top wall of the reset circular plate 683 abuts against or disengages from the limiting block 67. A reset spring 684 is sleeved on the reset rod 681. The two ends of the reset spring 684 are fixedly connected to the reset circular plate 683 and the reset frame 68, respectively. The reset spring 684 is used to provide a vertically upward force for the reset circular plate. This part of the structure is used to reset the counterweight 66.

[0044] The working principle of a dual-station laser welding device in this application is as follows: Before laser welding, the palm arm segment is placed on the support base 3, and then the palm hand segment is placed between the pressing buffer pad 44 and the long arm segment; the hydraulic cylinder 41 drives the piston rod 42 to extend downward, which drives the pressing buffer pad 44 to move downward and abut against the top wall of the palm hand segment. During this process, the lifting guide plate 43 slides vertically downward along the lifting guide column.

[0045] Before the palm section is placed, the return spring 684 is in its natural state, the bottom wall of the counterweight 66 abuts against the top wall of the return plate 683, the U-shaped spring is in a compressed state, the drive plate 63 rotates around the hinge shaft 62 toward the inside of the palm, causing the spring extension rod 65 on the hinge shaft 62 to rotate around the hinge shaft 62 toward the outside of the palm, thereby pulling the slider 671 on the limit block 67, thus causing the limit block 67 to move toward the outside of the palm; after the palm arm section is placed, the palm arm section abuts against the pressure plate 682 on the return frame 68, causing the return spring 684 to be in a compressed state; the return plate 683 leaves the counterweight 66, and under the rebound action of the U-shaped spring, the auxiliary positioning component 6 is in its original state. At this time, the top wall of one end of the limit block 67 abuts against the bottom wall of the counterweight 66, preventing the counterweight 66 from sliding down.

[0046] The pneumatic gripper 54 is driven by the cylinder 53 to clamp the weld seam of the palm sleeve by the tooling fixture 5. At this time, multiple balls 56 inside the pneumatic gripper 54 are in contact with the outer wall of the palm sleeve. The air supply pump 52 is driven to spray gas from the nozzle 51. If there is a large gap between the palm section and the arm section of the palm sleeve, the gas is blown into the palm sleeve through the gap. The high-pressure gas blown into the drive plate 63 pushes the drive plate 63 to rotate around the hinge shaft 62 towards the inside of the palm sleeve, thereby causing the spring telescopic rod 65 on the hinge shaft 62 to rotate around the hinge shaft 62 towards the outside of the palm sleeve. The slider 671, which is vertically slidably connected inside the spring telescopic rod 65, slides downward along its corresponding track, and drives the limiting block 67, which is hinged to the slider 671, through the sliding block. Sliding outwards along the support 61, the end of the limiting block 67 that abuts against the counterweight block 66 disengages from the counterweight block 66. Without the restriction of the limiting block 67, the counterweight block 66 slides downwards along the support 61, pressing down the spring telescopic rod 65, which in turn applies a downward force to the rubber block 651 connected to the top of the spring telescopic rod 65. The friction of the rubber block 651 on the palm section of the palm drives the long palm section to move downwards, reducing the weld gap between the palm section and the arm section of the palm. In addition, the rubber buffer pad 55 and the ball bearing 56 inside the pneumatic gripper 54 facilitate the downward sliding of the palm section when the weld gap is limited. After the weld gap is almost aligned, the gas no longer enters the tooling fixture 5 through the jet nozzle 51.

[0047] After the welding gap is positioned, the cylinder 53 outputs power to drive the pneumatic gripper 54 to open, so that the inner wall of the gripper finger of the pneumatic gripper 54 is separated from the palm barrel, and the tooling fixture 5 is removed; the position of the bracket 61 in the transverse slide rail 71 is adjusted, and the welding table is slid vertically along the bracket 61, thereby adjusting the position of the laser welding head on the welding table so that the laser welding gun is directly facing the gap between the palm section and the arm section of the palm barrel; the laser welding gun is turned on for preheating, and the motor 33 outputs power to drive the support base 3 to rotate, and the support base 3 drives the palm barrel placed above to rotate. At this time, the laser welding head is used to weld the gap between the palm section and the arm section of the palm barrel.

[0048] After welding is completed, hydraulic cylinder 41 drives piston rod 42 to move upward, causing pressure buffer pad 44 to move upward and detach from the top wall of palm cylinder, thus removing the welded palm cylinder; the pressure plate 682 on the return spring 684 is no longer under the pressure of the palm cylinder, the return spring 684 returns to its natural state, the return circular plate 683 slides vertically upward along the return rod 681 to push the counterweight block 66 to slide vertically upward along the bracket 61, the return spring 684 returns to its original state, and the auxiliary positioning component 6 also returns to its state before use.

[0049] It should be noted that after the pneumatic gripper 54 covers and seals the gap between the palm section and the arm section of the palm barrel, and the air pump 52 introduces high-pressure gas into the gap through the air nozzle 51 for 10 seconds, the auxiliary positioning component 6 is fully activated, and the excessive gap between the palm section and the arm section of the palm barrel is eliminated.

[0050] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-station laser welding device, characterized in that: Includes a support frame (1) and a work platform (2) set on top of the support frame (1); the work platform (2) has two sets of workstations; each set of workstations is provided with a support seat (3) and a clamping and positioning assembly (4) from bottom to top; the palm arm segment is placed on the support seat (3); the power output end of the clamping and positioning assembly (4) is used to abut against the top wall of the palm segment; each set of workstations is provided with a tooling fixture (5); the tooling fixture (5) is used to close the palm segment and the palm arm after closing. The welding gap of the arm segment; the tooling fixture (5) has multiple air jets (51) facing the welding gap; the air jets (51) are connected to an air supply pump (52); multiple sets of auxiliary positioning components (6) are hinged on the support base (3); the multiple sets of auxiliary positioning components (6) are evenly distributed along the circumference of the support base (3); the bottom end of the auxiliary positioning component (6) faces the welding gap; the top end of the auxiliary positioning component (6) is a telescopic end; the telescopic end abuts against the inner wall of the palm segment of the palm barrel.

2. The dual-station laser welding equipment according to claim 1, characterized in that: The tooling fixture (5) includes a cylinder (53), a pneumatic gripper (54), a rubber buffer pad (55), and multiple balls (56); the cylinder (53) is mounted on the work platform (2), and the pneumatic gripper (54) is connected to the power output end of the cylinder (53); the upper and lower parts of the inner wall of the gripper fingers of the pneumatic gripper (54) are provided with rubber buffer pads (55), and the rubber buffer pads (55) are fixedly connected along the circumference of the pneumatic gripper (54); multiple receiving grooves are opened on the inner wall of the upper rubber buffer pad (55); the multiple receiving grooves are evenly arranged along the length direction of the rubber buffer pad (55); the multiple balls (56) are embedded in the multiple receiving grooves one by one.

3. The dual-station laser welding equipment according to claim 1, characterized in that: The auxiliary positioning component (6) includes a bracket (61), a hinge shaft (62), a drive piece (63), a U-shaped spring piece (64), and a spring telescopic rod (65); the bracket (61) is disposed on the top wall of the support base (3); both ends of the hinge shaft (62) are rotatably connected to the bracket (61); one end of the drive piece (63) is connected to the hinge shaft (62), and the other end extends radially downward along the hinge shaft (62); any side of the drive piece (63) faces the weld gap; one end of the spring telescopic rod (65) is connected to the hinge shaft (62); the telescopic end of the spring telescopic rod (65) extends radially upward along the hinge shaft (62); one end of the U-shaped spring piece (64) is connected to the drive piece (63), and the other end is connected to the bracket (61); the U-shaped spring piece (64) is used to provide force for the drive piece (63) to approach the weld gap.

4. The dual-station laser welding equipment according to claim 3, characterized in that: The telescopic end of the spring telescopic rod (65) is connected to a rubber block (651).

5. A dual-station laser welding device according to claim 4, characterized in that: The auxiliary positioning component (6) further includes a counterweight (66) and a limiting block (67); the counterweight (66) is slidably mounted on the bracket (61) in a vertical direction; the limiting block (67) is slidably mounted on the bracket (61) in a horizontal direction; the top wall of one end of the limiting block (67) abuts against the bottom wall of the counterweight (66); a slider (671) is hinged to the other end of the limiting block (67), and the slider (671) is slidably connected to the body of the spring telescopic rod (65) in a vertical direction.

6. A dual-station laser welding device according to claim 5, characterized in that: The top wall of the support base (3) is provided with a reset frame (68); a reset rod (681) is slidably arranged on the reset frame (68) along the vertical direction; a pressure plate (682) is provided on the top of the reset rod (681); the top edge of the pressure plate (682) abuts against the inner wall of the palm section of the palm sleeve; a reset circular plate (683) is coaxially arranged on the reset rod (681); the top wall of the reset circular plate (683) abuts against or disengages from the limiting block (67); a reset spring (684) is sleeved on the reset rod (681); the two ends of the reset spring (684) are respectively connected to the reset circular plate (683) and the reset frame (68); the reset spring (684) is used to provide the reset circular plate (683) with a vertically upward force.

7. A dual-station laser welding device according to claim 1, characterized in that: The clamping and positioning assembly (4) includes a hydraulic cylinder (41) and a piston rod (42) slidably inserted into the hydraulic cylinder (41); four support columns (21) are provided on the working platform (2), and the top ends of the four support columns (21) are fixedly connected to a top plate (22); the hydraulic cylinder (41) is fixedly installed above the top plate (22), and the piston rod (42) slides downward through the top plate (22); a clamping buffer pad (44) is fixedly connected to the bottom end of the piston rod (42).

8. A dual-station laser welding device according to claim 7, characterized in that: A lifting guide plate (43) is fixedly connected to the piston rod (42); a support plate (31) is provided on the support base (3); vertical guide columns (23) are provided on both sides of the workstation; the bottom end of the vertical guide column (23) is fixedly connected to the work platform (2); the top end of the vertical guide column (23) passes through the support plate (31) and the lifting guide plate (43) in sequence and is then fixedly connected to the top plate (22).

9. A dual-station laser welding device according to claim 7, characterized in that: The bottom end of the piston rod (42) is rotatably connected to the pressing buffer pad (44); a bracket platform (32) is fixedly connected to the lower surface of the working platform (2); a motor (33) is fixedly connected to the bracket platform (32), and the power output shaft of the motor (33) is coaxially fixedly connected to the support base (3) to drive the palm cylinder to rotate.

10. A dual-station laser welding device according to claim 1, characterized in that: A horizontal slide rail (71) is provided in front of the working platform (2). A welding bracket (72) is slidably arranged on the horizontal slide rail (71). A longitudinal slide rail (73) is slidably arranged on the welding bracket (72). A welding table is slidably arranged on the longitudinal slide rail (73). The welding table is used to place the laser welding head.

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