A vacuum tank laser welding equipment for vacuum units

Abstract

The present invention relates to the field of laser welding equipment, specifically a vacuum tank laser welding equipment for a vacuum unit, including an operating table equipped with a three-jaw chuck, a welding gun provided on the rear side of the operating table through an adjustment mechanism for adjusting the angle, and an alignment mechanism for corresponding cover and tank body provided on the operating table. The present invention clamps the cover and the outside of the tank body at the same time through an abutment plate, and guides the cover through the abutment plate during the clamping process, so that the cover is automatically arranged coaxially with the tank body, ensuring the coaxiality of the two, and in the welding stage, the pushing assembly can be transformed from a clamping state to an abutment state by flipping the abutment plate, while enhancing the positioning stability of the cover. The present invention adopts two rollers to abut the cover and the upper side of the tank body respectively, and the rollers drive the welding gun to adjust the tilt angle in real time through a swinging assembly, ensuring that the laser beam of the welding gun always effectively penetrates the joint, avoiding molten pool offset or unfused defects caused by the drop.

Description

Technical Field

[0001] The invention relates to the field of laser welding equipment, in particular to vacuum tank laser welding equipment for a vacuum unit. Background Art

[0002] As one of the core components of a vacuum unit, the vacuum tank is mainly used to maintain a high vacuum environment in a closed cavity. Its structure is usually composed of a tank body and a cover connected by a circular weld. The weld has extremely high requirements for accuracy, airtightness and strength. Laser welding has gradually become a key technology in the manufacture of vacuum tanks due to its advantages such as high energy density, small heat-affected zone and fast welding speed.

[0003] At present, the device for laser welding of vacuum tanks generally adopts the following structure: a three-jaw chuck is installed on the operating table for centering, clamping and axially rotating the tank body, and the welding gun is fixed to the back side of the operating table through a driving arm, such as a linear guide rail, and moves along a preset path to align with the weld.

[0004] Specifically, the cover is temporarily fixed to the tank body by spot welding, and then the three-jaw chuck synchronously clamps the outer wall of the tank to ensure that it rotates at a constant speed during the welding process, so that the welding gun performs laser welding along the joint between the tank body and the cover to form a continuous and uniform weld.

[0005] Although the existing devices are relatively mature in basic welding functions, they still have significant defects in actual applications. First, the alignment error between the cover and the tank body is difficult to eliminate. Due to factors such as processing accuracy, assembly tolerance or material deformation, there are often axial or radial deviations at the joint between the cover and the tank body, that is, alignment errors. In particular, when manual alignment spot welding is used, it is impossible to guarantee the accurate alignment of the cover and the tank body, which causes weld offset and uneven penetration, resulting in reduced welding quality.

[0006] Secondly, the welding gun has insufficient adjustment flexibility when welding to a weld with a stepped position. When the alignment error objectively exists, the welding guns of existing devices mostly use fixed angles or single degree of freedom adjustment, and cannot adapt to the step or tilt between the cover and the tank body in real time. For example, if there is a height difference between the tank body and the cover seam, the traditional welding gun lacks adaptive deflection function, and the laser beam is difficult to efficiently enter the weld, which can easily lead to molten pool offset or unfused defects. Summary of the Invention

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a vacuum tank laser welding equipment for a vacuum unit, including an operating table equipped with a three-jaw chuck, a welding gun is provided on the rear side of the operating table through an adjustment mechanism for adjusting the angle, and a positioning mechanism for corresponding cover and tank body is provided on the operating table.

[0008] The adjustment mechanism includes a movable arm that slides left and right on the rear side of the operating table, a cantilever that slides up and down on the front side of the movable arm, and two rollers are connected to the lower part of the front side of the cantilever through a swing assembly, and a welding gun is also connected to the swing assembly.

[0009] The cantilever drives two rollers to rest against the upper sides of the cover and the tank body respectively through the swing assembly. When there is a height difference between the cover and the tank body, the rollers drive the welding gun to deflect to the corresponding angle through the swing assembly.

[0010] The alignment mechanism includes a support that slides left and right on the operating table, a sliding column is provided on the left side of the support for sliding left and right, and abutment plates are provided on the sliding column at equal intervals along the circumference of the sliding column through a pushing assembly.

[0011] The abutment plate slides along the radial direction of the sliding column, thereby clamping the cover and the outer side of the can body at the same time. By pushing the assembly to flip the abutment plate, the abutment plate changes from clamping the cover to pushing the cover.

[0012] Preferably, the swing assembly includes two arc grooves arranged vertically on the lower side of the cantilever, the two arc grooves are coaxially arranged, and the axis of the arc groove is located at the lower part of the welding gun. An L-shaped plate is slidingly provided on the lower side of the cantilever, and the vertical section of the L-shaped plate is slidably connected to the inside of the two arc grooves through two raised columns.

[0013] Preferably, the horizontal section of the L-shaped plate is fixedly connected to the welding gun, and the lower side of the cantilever is provided with two sliding square rods arranged left and right for sliding up and down. The lower side of the sliding square rod is rotatably connected to the roller at the corresponding position, and a tension spring is provided between the sliding square rod and the cantilever.

[0014] Preferably, a T-shaped plate is rotatably provided on the cantilever, and two waist-shaped grooves symmetrically arranged on the left and right are opened on the transverse section of the T-shaped plate. The rear side of the sliding square rod is slidably connected to the corresponding waist-shaped groove through a linkage column. A slot is opened on the vertical section of the T-shaped plate, and a fixed column slidably connected to the inside of the slot is fixedly installed on the vertical section of the L-shaped plate.

[0015] Preferably, the pushing assembly includes a sliding sleeve slidably arranged on the sliding column, and adjustment plates slidably arranged along the radial direction of the sliding sleeve at equal intervals along the circumference of the sliding sleeve, and the adjustment plates are hinged to the middle of the abutting plate.

[0016] Preferably, a baffle is provided on the horizontal section of the adjustment plate for sliding left and right, a moving part is provided on the sliding column for sliding left and right, and the baffle is slidably connected to the moving part along the radial direction of the sliding column.

[0017] Preferably, a screw is rotatably provided inside the sliding column, the screw is threadedly connected to the sliding sleeve, an abutment ring is rotatably provided at the left end of the sliding column, and a hydraulic cylinder for driving the moving part to slide left and right is fixedly installed on the support.

[0018] Preferably, a plurality of spring telescopic rods are hinged on the movable member at equal intervals along its circumference, and the spring telescopic rods are hinged to the abutting plate.

[0019] Preferably, a synchronous ring is rotatably provided on the left side of the sliding sleeve, and connecting plates are hinged on the synchronous ring at equal intervals along its circumference. The connecting plates are hinged to adjustment plates at corresponding positions, and the adjustment plates are fixedly connected to the sliding sleeve by locking screws.

[0020] Preferably, the left side of the abutment plate is an arc-shaped structure that bends gradually from right to left in a direction away from the axis of the sliding column. A blocking block is provided in the middle of the abutment plate for radial sliding along the sliding column, and a coil spring is provided between the blocking block and the abutment plate.

[0021] The beneficial effects of the present invention are: 1. The present invention clamps the cover and the outside of the tank body at the same time through the abutment plate, and guides the cover through the abutment plate during the clamping process. When the abutment plate contacts the tank body, the cover is automatically arranged coaxially with the tank body, effectively eliminating assembly errors and ensuring the coaxiality of the two. In the welding stage, the push assembly can be transformed from a clamping state to an abutting state by flipping the abutment plate, while enhancing the positioning stability of the cover and reducing the offset caused by welding vibration.

[0022] Second, the present invention uses two rollers to respectively rest against the cover and the upper side of the can body. If there is a height difference between the two, the roller drives the welding gun through the swing assembly to adjust the tilt angle in real time, ensuring that the laser beam of the welding gun always effectively penetrates the joint, avoiding molten pool deviation or unfused defects caused by the height difference, and significantly improving the laser energy utilization rate and weld quality.

[0023] 3. The present invention adopts an adjustment plate that slides radially along the sliding sleeve, which can flexibly adjust the distance from the abutment plate to the axis of the sliding column to meet the clamping requirements of workpieces with different diameters. At the same time, the relative distance between the abutment ring and the sliding sleeve can be adjusted by rotating the screw, further optimizing the adaptability to different closures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the support, sliding column, abutment plate and adjustment plate in the present invention.

[0027] Figure 3 It is a structural schematic diagram of the sliding column, the abutting ring, the adjusting plate and the spring telescopic rod in the present invention.

[0028] Figure 4 It is a structural diagram of the sliding sleeve, synchronizer ring, connecting plate and baffle in the present invention.

[0029] Figure 5 It is a partial structural diagram of the three-jaw chuck, operating table, cantilever and L-shaped plate in the present invention.

[0030] Figure 6 It is a partial cross-sectional view of the cantilever, welding gun, L-shaped plate and sliding square rod in the present invention.

[0031] Figure 7 It is a cross-sectional view of the T-shaped plate, cantilever, sliding square rod and L-shaped plate in the present invention.

[0032] Figure 8 It is a cross-sectional view of the abutment plate and the blocking block in the present invention.

[0033] In the figure: 1. three-jaw chuck; 2. operating table; 3. adjusting mechanism; 4. welding gun; 5. positioning mechanism; 31. moving arm; 32. cantilever; 33. swing assembly; 34. roller; 51. support; 52. sliding column; 53. pushing assembly; 54. abutment plate; 331. L-shaped plate; 332. sliding square rod; 333. T-shaped plate; 521. screw; 522. abutment ring; 523. hydraulic cylinder; 531. sliding sleeve; 532. adjusting plate; 533. blocking block; 534. baffle; 535. moving part; 536. synchronization ring; 537. connecting plate; 538. spring telescopic rod. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0035] See Figure 1 、 Figure 2 and Figure 5 A vacuum tank laser welding device for a vacuum unit includes an operating table 2 equipped with a three-jaw chuck 1, a welding gun 4 is provided on the rear side of the operating table 2 through an adjustment mechanism 3 for adjusting the angle, and a positioning mechanism 5 for corresponding cover and tank body is provided on the operating table 2.

[0036] When it is necessary to perform circumferential seam welding on the cover and the tank body, the operator first uses the three-jaw chuck 1 to center and clamp the tank body, and then the operator manually places the cover inside the positioning mechanism 5, so that the positioning mechanism 5 automatically centers and limits the cover, and then moves the positioning mechanism 5 to the left. The positioning mechanism 5 drives the cover to align coaxially and fit against the right side of the tank body, and then moves the welding gun 4 to the connection between the cover and the tank body through the adjustment mechanism 3, and then rotates the tank body through the three-jaw chuck 1, and the tank body drives the cover to rotate synchronously, and at the same time, the connection between the cover and the tank body is welded by the welding gun 4.

[0037] See Figure 1 、 Figure 2 、 Figure 3 and Figure 8 The alignment mechanism 5 includes a support 51 that slides left and right on the operating table 2. A sliding column 52 is provided on the left side of the support 51 for sliding left and right. Abutment plates 54 are provided on the sliding column 52 at equal intervals along the circumference of the sliding column 52 through a pushing component 53. The abutment plates 54 slide along the radial direction of the sliding column 52 to clamp the cover and the outer side of the can body at the same time. The abutment plates 54 are flipped by the pushing component 53 to change from clamping the cover to pushing the cover.

[0038] It should be noted that the support 51 is driven by an existing electric slide rail assembly, so that the support 51 can slide left and right on the operating table 2.

[0039] In order to facilitate the operator to put the cover between the abutment plates 54 and prevent the cover put between the abutment plates 54 from falling out, the following design is made: Figure 2 and Figure 4 A blocking block 533 is provided in the middle of the abutment plate 54 for radial sliding along the sliding column 52. A coil spring is provided between the blocking block 533 and the abutment plate 54. The left and right sides of the blocking block 533 close to the axis of the sliding column 52 are both inclined structures, and the left side of the abutment plate 54 is an arc structure that gradually bends from right to left in the direction away from the axis of the sliding column 52.

[0040] When it is necessary to weld the cover to the tank body, the operator manually moves the cover from left to right between the abutment plates 54. Guided by the arc-shaped structure on the left side of the abutment plates 54, the cover can be quickly moved between the abutment plates 54. At this time, the side of the abutment plates 54 close to the axis of the sliding column 52 is in contact with the outside of the cover, and then the cover is continued to be moved to the right so that the outside of the cover contacts the inclined structure of the blocking block 533.

[0041] like Figure 8 As shown, the cover slides along the inclined structure of the blocking block 533, thereby pushing the blocking block 533 to move outward. When the cover is completely moved to the right part of the blocking block 533, the coil spring pushes the blocking block 533 to the initial position through its own elastic force, so that the vertical surface of the blocking block 533 abuts and blocks the left part of the cover, thereby preventing the cover from falling out.

[0042] See Figure 2 、 Figure 3 and Figure 4 The pushing assembly 53 includes a sliding sleeve 531 that slides left and right on the sliding column 52. The sliding sleeve 531 is provided with adjusting plates 532 that slide radially along the sliding sleeve 531 at equal intervals along its circumference. The adjusting plate 532 is hinged to the middle of the abutting plate 54.

[0043] In order to facilitate the quick alignment of different covers and can bodies, the following structure is made to adapt to the alignment of different covers and can bodies through pre-adjustment: Figure 2 、 Figure 3 and Figure 4 A screw rod 521 is rotatably provided inside the sliding column 52 , and the screw rod 521 is threadedly connected to the sliding sleeve 531 . A supporting ring 522 is rotatably provided at the left end of the sliding column 52 .

[0044] See Figure 2 and Figure 4 A synchronous ring 536 is rotatably provided on the left side of the sliding sleeve 531. Connecting plates 537 are hinged on the synchronous ring 536 at equal intervals along its circumference. The connecting plates 537 are hinged to the adjusting plates 532 at the corresponding positions. The adjusting plates 532 are fixedly connected to the sliding sleeve 531 by locking screws.

[0045] The operator manually moves one of the adjustment plates 532 along the radial direction of the sliding column 52 in advance. The manually moved adjustment plate 532 drives the synchronization ring 536 through the connecting plate 537 at the corresponding position, and the synchronization ring 536 pushes the remaining adjustment plates 532 to move synchronously through the remaining connecting plates 537 in real time, so that all the adjustment plates 532 can move synchronously. At the same time, the adjustment plate 532 drives the abutment plate 54 to move synchronously, so that the abutment plate 54 can clamp the caps and can bodies of different diameters.

[0046] When the cover moves between the abutment plates 54 and the blocking block 533 blocks the left part of the cover, the arc-shaped structure on the right part of the cover abuts against the left part of the abutment ring 522, thereby limiting the position of the cover between the abutment plates 54. The operator drives the sliding sleeve 531 to move its position relative to the abutment ring 522 in the left and right directions by manually rotating the screw 521 in advance. The sliding sleeve 531 drives the blocking block 533 to move left and right synchronously with the abutment plate 54 through the adjustment plate 532, thereby adjusting the distance between the blocking block 533 and the abutment ring 522 to adapt to different covers.

[0047] See Figure 2 、 Figure 3 and Figure 4 A baffle 534 is provided on the horizontal section of the adjustment plate 532 for sliding left and right, and a moving part 535 is provided on the sliding column 52 for sliding left and right. The baffle 534 is slidably connected to the moving part 535 along the radial direction of the sliding column 52, and a plurality of spring telescopic rods 538 are hinged on the moving part 535 at equal intervals along its circumference. The spring telescopic rods 538 are hinged to the abutment plate 54, and a hydraulic cylinder 523 for driving the moving part 535 to slide left and right is fixedly installed on the support 51.

[0048] In the initial state, the telescopic section of the hydraulic cylinder 523 is in an extended state, so that the hydraulic cylinder 523 pushes the moving part 535 to abut against the right side of the sliding sleeve 531. At this time, the moving part 535 drives the baffle 534 to move to the side of the abutment plate 54 away from the axis of the sliding column 52, and the baffle 534 blocks and limits the abutment plate 54, so that the right part of the abutment plate 54 is arranged horizontally left and right, so that the abutment plate 54 can fit against the outer side of the cover for centering and limiting it, and at this time the spring telescopic rod 538 is in a compressed state.

[0049] When the cover is centered and limited between the abutment plates 54, the support 51 is moved to the left, so that the support 51 pushes the cover and the abutment plate 54 to move to the left synchronously, so that the arc structure on the left side of the abutment plate 54 moves to the outside of the tank body. Guided by the arc structure of the abutment plate 54, the side of the abutment plate 54 close to the axis of the sliding column 52 moves smoothly and abuts against the outside of the tank body, so that the abutment plate 54 clamps the tank body and the cover at the same time, so that the tank body and the cover are arranged coaxially, which effectively reduces the alignment error between the tank body and the cover.

[0050] Then continue to move the support 51, and the support 51 drives the blocking block 533 to contact the right side of the tank body through the abutment plate 54, so that the tank body pushes the blocking block 533 along the inclined surface of the blocking block 533 in the direction away from the axis of the sliding column 52. When the blocking block 533 is completely moved to the outside of the tank body, the support 51 pushes the cover to rest against the tank body through the abutment ring 522, so that the cover and the tank body are coaxially abutted against each other.

[0051] Then, the telescopic section of the hydraulic cylinder 523 is retracted, so that the hydraulic cylinder 523 drives the moving part 535 to the right away from the sliding sleeve 531, and the moving part 535 drives the baffle 534 to move synchronously. During this process, the spring telescopic rod 538 is extended by its own elastic force. When the left side of the baffle 534 is completely moved to the right part of the rotating axis of the abutment plate 54 and the adjustment plate 532, the baffle 534 no longer blocks the left part of the abutment plate 54, so that the left part of the abutment plate 54 can deflect in the direction away from the axis of the sliding column 52.

[0052] At the same time, the spring telescopic rod 538 is extended to its longest state, and then the moving part 535 continues to slide to the right, so that the moving part 535 pulls the left part of the abutment plate 54 through the spring telescopic rod 538 to deflect in the direction away from the axis of the sliding column 52, so that the abutment plate 54 no longer clamps the cover and the tank body, and at the same time, the abutment plate 54 drives the blocking block 533 to no longer contact the joint between the cover and the tank body, preventing the blocking block 533 from scratching the joint when the cover and the tank body are rotated, thereby ensuring the roughness of the joint, ensuring the welding quality, and ensuring the smooth rotation of the cover and the tank body, preventing friction vibration from affecting the welding quality.

[0053] It should be noted that a rotating roller is rotatably provided on one side of the right side of the abutment plate 54 close to the axis of the sliding column 52. When the blocking block 533 is no longer in contact with the joint position, the abutment plate 54 continues to be pulled to deflect, so that the abutment plate 54 drives the rotating roller thereon to rotate and abut against the arc surface of the cover. By pushing the cover with the rotating roller, the cover is further pressed against the tank body, effectively increasing the stability of the cover and the tank body during welding, and through a number of rotating rollers arranged along the circumference, the cover can also be centered and supported to a certain extent, thereby ensuring the coaxiality of the cover and the tank body during welding.

[0054] See Figure 1 、 Figure 5 、 Figure 6 and Figure 7 The adjusting mechanism 3 includes a movable arm 31 which is arranged on the rear side of the operating table 2 for sliding left and right. A cantilever 32 is arranged on the front side of the movable arm 31 for sliding up and down. The lower front part of the cantilever 32 is connected to two rollers 34 through a swing assembly 33. The swing assembly 33 is also connected to the welding gun 4. The cantilever 32 drives the two rollers 34 to rest against the upper side of the cover and the tank body respectively through the swing assembly 33. When there is a height difference between the cover and the tank body, the rollers 34 drive the welding gun 4 to deflect to the corresponding angle through the swing assembly 33.

[0055] Due to the error between the cover and the tank body during manufacturing, even if the tank body and the cover are coaxially aligned, the seam will be misaligned due to the difference in roundness of the contact position between the tank body and the cover. In order to ensure that the welding gun 4 can effectively weld the misaligned seams, the following structural design is made: the swing assembly 33 includes two upper and lower arc grooves opened on the lower side of the cantilever 32, the two arc grooves are coaxially arranged, and the axis of the arc groove is located at the lower part of the welding gun 4, and an L-shaped plate 331 is slidably provided on the lower side of the cantilever 32, and the vertical section of the L-shaped plate 331 is slidably connected to the inside of the two arc grooves through two raised columns.

[0056] See Figure 5 、 Figure 6 and Figure 7 The horizontal section of the L-shaped plate 331 is fixedly connected to the welding gun 4. Two sliding square rods 332 arranged left and right are provided on the lower side of the cantilever 32 for sliding up and down. The lower side of the sliding square rod 332 is rotatably connected to the roller 34 at the corresponding position. A tension spring is provided between the sliding square rod 332 and the cantilever 32.

[0057] See Figure 6 and Figure 7 A T-shaped plate 333 is rotatably provided on the cantilever 32. Two waist-shaped grooves arranged symmetrically on the left and right are provided on the horizontal section of the T-shaped plate 333. The rear side of the sliding square rod 332 is slidably connected to the corresponding waist-shaped groove through a linkage column. A notch is provided on the vertical section of the T-shaped plate 333, and a fixed column slidably connected to the inside of the notch is fixedly installed on the vertical section of the L-shaped plate 331.

[0058] When the abutment plate 54 is pressed against the sealing cover by the rotating roller thereon, the L-shaped plate 331 is driven to move synchronously by the left and right movement of the movable arm 31 and the up and down movement of the cantilever 32, so that the L-shaped plate 331 drives the welding gun 4 to move to the corresponding joint position between the sealing cover and the tank body, and at the same time makes the two rollers 34 respectively abut against the outer surfaces of the sealing cover and the tank body. The reaction force of the sealing cover and the tank body on the roller 34 pushes the roller 34 upward, so that the roller 34 drives the sliding square rod 332 to stretch the tension spring.

[0059] When the welding gun 4 moves to the corresponding joint position between the cover and the tank body, the tank body is rotated by the three-jaw chuck 1, so that the tank body drives the cover to rotate synchronously through friction and the welded part of the tank body and the cover, and at the same time, the welding gun 4 is started to weld the joint between the cover and the tank body.

[0060] When the welding gun 4 is welded to the alignment error position of the cover and the tank body, the cover and the tank body push the two rollers 34 to be staggered up and down, so that the roller 34 drives the sliding square rod 332 to move synchronously, and the sliding square rod 332 drives the T-shaped plate 333 to rotate through the cooperation of the linkage column and the waist-shaped groove, and the T-shaped plate 333 drives the L-shaped plate 331 to swing in the same direction along the trajectory of the arc groove through the cooperation of the notch and the fixed column, so that the L-shaped plate 331 drives the welding gun 4 to deflect to the lower side, and since the axis of the arc groove is located at the lower part of the welding gun 4, the welding gun 4 can rotate around the weld seam, so that the welding gun 4 is always aligned with the weld seam, thereby effectively ensuring that the laser beam of the welding gun 4 can always be shot into the joint, avoiding the molten pool offset or unfused defects caused by the drop, and significantly improving the laser energy utilization rate and weld quality.

[0061] See Figures 1 to 8 When welding the cover to the tank body, the present invention further includes the following steps:

[0062] In the first step, the operator moves the cover from left to right between the abutment plates 54, and makes the arc structure on the right side of the cover abut against the left side of the synchronization ring 536. The coil spring pushes the blocking block 533 to block the left side of the cover through its own elastic force to prevent the cover from falling out.

[0063] In the second step, the support 51 is moved to the left. The arc-shaped structure of the abutment plate 54 is guided so that the side of the abutment plate 54 close to the axis of the sliding column 52 moves smoothly and abuts against the outside of the can body, thereby simultaneously clamping the can body and the cover by the abutment plate 54, so that the can body and the cover are arranged coaxially.

[0064] In the third step, the support 51 is continued to be moved so that the cover and the tank body are coaxially aligned and pressed against each other. Then, the telescopic section of the hydraulic cylinder 523 is retracted so that the abutment plate 54 drives the rotating roller thereon to rotate and press against the curved surface of the cover. By pushing the cover with the rotating roller, the cover is further pressed against the tank body, thereby effectively increasing the stability of the cover and the tank body during welding.

[0065] In the fourth step, the welding gun 4 is moved to the joint position corresponding to the cover and the tank body by the movable arm 31 and the cantilever 32 , and the two rollers 34 are respectively pressed against the outer surfaces of the cover and the tank body.

[0066] In the fifth step, the can body and the cover are rotated by the three-jaw chuck 1, and the welding gun 4 is started at the same time to weld the joint between the cover and the can body. The cover and the can body push the two rollers 34, so that the welding gun 4 is driven to deflect to the lower side of the staggered arrangement of the joint, thereby effectively ensuring that the laser beam of the welding gun 4 can always penetrate the joint.

[0067] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A vacuum tank laser welding device for a vacuum unit, comprising an operating table equipped with a three-jaw chuck, characterized in that: A welding gun is provided on the rear side of the operating table through an adjustment mechanism for adjusting the angle, and a positioning mechanism for the corresponding cover and tank body is provided on the operating table; The adjustment mechanism includes a movable arm that slides left and right on the rear side of the operating table, a cantilever that slides up and down on the front side of the movable arm, and two rollers are connected to the lower part of the front side of the cantilever through a swing assembly, and a welding gun is also connected to the swing assembly; The cantilever drives two rollers to rest against the upper side of the cover and the tank body respectively through the swing assembly. When there is a height difference between the cover and the tank body, the rollers drive the welding gun to deflect to the corresponding angle through the swing assembly. The alignment mechanism includes a support that slides left and right on the operating table, a sliding column is provided on the left side of the support for sliding left and right, and abutment plates are provided on the sliding column at equal intervals along the circumference of the sliding column through a pushing assembly; The abutment plate slides along the radial direction of the sliding column, thereby clamping the cover and the outer side of the can body at the same time. By pushing the assembly to flip the abutment plate, the abutment plate changes from clamping the cover to pushing the cover; The pushing assembly includes a sliding sleeve that is slidably arranged on the sliding column, and an adjustment plate that slides along its radial direction is evenly spaced on the sliding sleeve along the circumference of the sliding sleeve, and the adjustment plate is hinged to the middle part of the abutting plate; A baffle is provided on the horizontal section of the adjustment plate for sliding left and right, a moving part is provided on the sliding column for sliding left and right, and the baffle is slidably connected to the moving part along the radial direction of the sliding column; A screw is provided for rotation inside the sliding column, which is threadedly connected to the sliding sleeve. A support ring is provided for rotation at the left end of the sliding column, and a hydraulic cylinder for driving the moving part to slide left and right is fixedly installed on the support. The movable member is hinged with a plurality of spring telescopic rods at equal intervals along its circumference, and the spring telescopic rods are hinged with the abutting plate; A synchronous ring is provided on the left side of the sliding sleeve, and connecting plates are hinged to the synchronous ring at equal intervals along its circumference, and the connecting plates are hinged to the adjusting plates at corresponding positions; The left side of the abutment plate is an arc-shaped structure that bends gradually from right to left in a direction away from the axis of the sliding column. A blocking block is provided in the middle of the abutment plate for radial sliding along the sliding column, and a coil spring is provided between the blocking block and the abutment plate.

2. The vacuum tank laser welding equipment for a vacuum unit according to claim 1, characterized in that: The swing assembly includes two arc grooves arranged vertically on the lower side of the cantilever. The two arc grooves are arranged coaxially, and the axis of the arc groove is located at the lower part of the welding gun. An L-shaped plate is slidably provided on the lower side of the cantilever, and the vertical section of the L-shaped plate is slidably connected to the inside of the two arc grooves through two raised columns.

3. The vacuum tank laser welding equipment for a vacuum unit according to claim 2, characterized in that: The horizontal section of the L-shaped plate is fixedly connected to the welding gun. The lower side of the cantilever is provided with two sliding square rods arranged left and right for sliding up and down. The lower side of the sliding square rod is rotatably connected to the roller at the corresponding position. A tension spring is provided between the sliding square rod and the cantilever.

4. The vacuum tank laser welding equipment for a vacuum unit according to claim 3, characterized in that: A T-shaped plate is rotatably provided on the cantilever, and two waist-shaped grooves arranged symmetrically on the left and right are provided on the transverse section of the T-shaped plate. The rear side of the sliding square rod is slidably connected to the corresponding waist-shaped groove through a linkage column. A notch is provided on the vertical section of the T-shaped plate, and a fixed column slidingly connected to the inside of the notch is fixedly installed on the vertical section of the L-shaped plate.

5. The vacuum tank laser welding equipment for a vacuum unit according to claim 1, characterized in that: The adjusting plate is fixedly connected to the sliding sleeve via a locking screw.

Images