Laser welding positioning system

Abstract

The present invention relates to the field of laser welding technology, and specifically to a laser welding positioning system; it comprises a workbench and an adjusting arm at a rear position on the upper surface of the workbench; the end of the adjusting arm is fixedly connected to a welding head; the upper surface of the workbench is fixedly connected to a support block; the support block is rotatably connected to an output shaft of a motor; the outer wall of the motor is fixedly connected to the support block through a fixed block; the output shaft of the motor is fixedly connected to a first turntable; the end surface of the first turntable is evenly provided with slide grooves around the center; the present invention achieves clamping and positioning of the pipes before welding by sleeves of two pipes to be welded on the outside of a plurality of positioning strips and controlling the plurality of positioning strips to expand outwards. Compared with the existing method of clamping and positioning the pipes using two separate clamps, the present invention has higher welding positioning efficiency and is less likely to cause the two pipes to be misaligned, thereby improving the efficiency and quality of laser welding.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, in particular to a laser welding positioning system. Background Art

[0002] Laser welding machine is a machine used for laser material processing. Laser welding uses high-energy laser pulses to locally heat the material in a small area. The energy of laser radiation diffuses into the interior of the material through heat conduction, and the material is melted to form a specific molten pool to achieve the purpose of welding. Laser welding technology is widely used in mechanical manufacturing, aerospace, automotive industry, powder metallurgy, biomedicine, microelectronics industry and other fields. Before laser welding, the workpieces to be welded need to be clamped and positioned so that the two workpieces to be welded can be accurately welded.

[0003] For laser welding of pipes, it is necessary to use one of the clamps to clamp one of the pipes, and then use another clamp to clamp the other pipe. Since the two pipes to be welded are clamped by their respective clamps, the laser welding process of the pipes is more cumbersome and inconvenient. In addition, during the use of the two independent clamps, the pipes clamped by the two independent clamps will inevitably have clamping deviations, which will eventually make it difficult to align the two pipes to be welded, affecting the laser welding positioning effect. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the present invention proposes a laser welding positioning system. The present invention achieves the clamping and positioning of the pipes before welding by putting two pipes to be welded on the outside of multiple positioning strips and controlling the multiple positioning strips to expand outward. Compared with the existing method of clamping and positioning the pipes with two separate clamps, the welding positioning efficiency of the present invention is higher, and it is not easy for the two pipes to be misaligned, thereby improving the efficiency and quality of laser welding.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a laser welding positioning system described in the present invention comprises a workbench and an adjustment arm at a rear position on the upper surface of the workbench; the end of the adjustment arm is fixedly connected to the welding head; the upper surface of the workbench is fixedly connected to a support block; the support block is rotatably connected to the output shaft of the motor; the outer wall of the motor is fixedly connected to the support block through a fixed block; the output shaft of the motor is fixedly connected to the first turntable; the end surface of the first turntable is evenly provided with slide grooves around the center; the slide groove is arranged to penetrate along the axial direction of the first turntable; the slider is slidably connected in the slide groove; the center of the first turntable facing away from the motor is rotatably connected to the second turntable; the end surface of the second turntable is evenly provided with inclined guide grooves around the center; the guide groove is arranged to penetrate along the axial direction of the second turntable; the guide groove is movably connected to a movable rod; one end of the movable rod is fixedly connected to the corresponding slider, and the other end is fixedly connected to a positioning strip; the positioning strip extends to the bottom of the welding head; the guide groove can drive multiple positioning strips to move away or approach synchronously under the rotation of the second turntable.

[0006] Preferably, a side of the first turntable close to the second turntable is provided with an annular groove coaxial with the first turntable; the bottom of the annular groove is evenly fixed with a clamping block; a locking groove is penetrated by the end surface of the second turntable; the locking groove and the annular groove are arranged correspondingly; a locking block is slidably connected in the locking groove; the side of the locking block away from the first turntable is fixedly connected to a locking handle; the side of the locking handle close to the second turntable is connected to the second turntable through a first tension spring; the end of the locking block away from the locking handle can be clamped between adjacent clamping blocks in the annular groove.

[0007] Preferably, the clamping block is provided with a first guide surface in the circumferential direction; the locking block is provided with a second guide surface in the circumferential direction at one end close to the clamping block; the second guide surface contacts the first guide surface when the locking block rotates; the locking block and the clamping block are unidirectionally locked.

[0008] Preferably, two movable grooves are provided on a side of the positioning bar away from the central axis of the second turntable; the depths of the two movable grooves on the positioning bar become shallower as they move away from each other; the bottom of the movable groove close to the second turntable is slidably connected to the first movable block; the first movable block is connected to the corresponding movable groove wall on a side close to the second turntable by a second tension spring; the bottom of the movable groove away from the second turntable is slidably connected to the second movable block; the side of the second movable block away from the second turntable is connected to the corresponding movable groove wall by a third tension spring.

[0009] Preferably, the tension of the second tension spring and the third tension spring are both greater than the gravity of the workpiece to be welded; the tension of the second tension spring is less than the tension of the third tension spring; the speed at which the third tension spring pulls the second moving block back is greater than the speed at which the second tension spring pulls the first moving block back.

[0010] Preferably, the first moving block and the second moving block are provided with a compensation groove on one side away from the central axis of the second turntable; the compensation block is slidably connected in the compensation groove; and the compensation block is connected to the bottom of the compensation groove via a first spring.

[0011] Preferably, an adjustment groove is provided on the end surface of the second turntable along the axial direction of the second turntable; a plurality of the adjustment grooves are evenly distributed around the center of the second turntable; an adjustment block is slidably connected in the adjustment groove; the guide groove is provided on the adjustment block; and the adjustment block can move along the adjustment groove toward or away from the center of the second turntable.

[0012] Preferably, the adjusting groove wall is provided with a plurality of square grooves; the plurality of square grooves are sequentially away from the center of the second turntable; an L-shaped groove is provided on the side of the adjusting block that is in sliding contact with the adjusting groove; the other end of the L-shaped groove is connected to the side of the adjusting block that is away from the first turntable; an L-shaped block is slidably connected in the L-shaped groove; the L-shaped block is connected to the L-shaped groove wall by a second spring; one end of the L-shaped block can be inserted into the corresponding square groove, and the other end extends out of the L-shaped groove.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention achieves the clamping and positioning of the pipes before welding by putting two pipes to be welded on the outside of a plurality of positioning strips and controlling the plurality of positioning strips to expand outward. Compared with the existing method of clamping and positioning the pipes using two separate clamps, the welding positioning efficiency of the present invention is higher, and it is less likely that the two pipes will be misaligned, thereby improving the efficiency and quality of laser welding.

[0015] 2. In the process of the three positioning bars expanding outward, the first moving block and the second moving block cooperate with each other to make the two pipes to be welded move towards each other by themselves until the two pipes to be welded are pressed against each other, thereby minimizing the weld formed by the two pipes to be welded, eliminating the step of workers moving the two pipes closer to each other, and facilitating the welding of the pipes.

[0016] 3. In the present invention, the first moving block and the second moving block will drive the corresponding compensation block to contact the inner wall of the outer pipe. The compensation block will overcome the first spring and retract into the compensation groove when squeezed. Due to the action of the first moving block and the second moving block away from the central axis of the second turntable, and in cooperation with the elastic force of the first spring, the compensation block contacts the inner wall of the pipe, and two pipes with different inner diameters can be clamped and positioned, thereby improving the application range of welding positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0018] Figure 1 is a stereogram of the present invention;

[0019] Figure 2 is a three-dimensional diagram of the positioning strip of the present invention;

[0020] Figure 3 yes Figure 1 A stereogram from another angle;

[0021] Figure 4 yes Figure 2 A stereogram from another angle;

[0022] Figure 5 yes Figure 4 A cross-sectional view of

[0023] Figure 6 It is a three-dimensional diagram of the first rotating disk and the second rotating disk in the present invention;

[0024] Figure 7 is a three-dimensional diagram of the second rotating disk of the present invention;

[0025] Figure 8 is a three-dimensional diagram of the first rotating disk in the present invention;

[0026] In the figure: workbench 1, adjusting arm 2, welding head 21, support block 3, motor 31, first turntable 4, slide groove 41, slider 42, annular groove 43, block 44, first guide surface 441, second turntable 5, lock groove 51, lock block 52, second guide surface 521, lock handle 53, first tension spring 54, adjusting groove 55, square groove 56, adjusting block 6, guide groove 61, movable rod 62, L-shaped groove 63, L-shaped block 64, second spring 65, positioning bar 7, movable groove 71, first movable block 8, second tension spring 81, compensation groove 82, compensation block 83, first spring 84, second movable block 9, third tension spring 91. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] like Figures 1 to 8 As shown, the present invention includes the following embodiments:

[0029] Embodiment 1:

[0030] A laser welding positioning system comprises a workbench 1 and an adjusting arm 2 at a rear position on the upper surface of the workbench 1; the end of the adjusting arm 2 is fixedly connected to a welding head 21; the upper surface of the workbench 1 is fixedly connected to a support block 3; the support block 3 is rotatably connected to the output shaft of a motor 31; the outer wall of the motor 31 is fixedly connected to the support block 3 through a fixed block; the output shaft of the motor 31 is fixedly connected to a first turntable 4; the end surface of the first turntable 4 is evenly provided with slide grooves 41 around the center; the slide grooves 41 are arranged to penetrate the first turntable 4 axially; the slide grooves 41 are slidably connected to the output shaft of the motor 31; The slider 42; the first turntable 4 is rotatably connected to the second turntable 5 at the center of the side facing away from the motor 31; the end surface of the second turntable 5 is evenly provided with inclined guide grooves 61 around the center; the guide grooves 61 are axially penetrated along the second turntable 5; a movable rod 62 is movably connected in the guide grooves 61; one end of the movable rod 62 is fixedly connected to the corresponding slider 42, and the other end is fixedly connected to the positioning bar 7; the positioning bar 7 extends to the bottom of the welding head 21; the guide grooves 61 can drive multiple positioning bars 7 to move away or closer synchronously when the second turntable 5 rotates.

[0031] In this embodiment, an annular groove 43 coaxial with the first turntable 4 is provided on one side of the first turntable 4 close to the second turntable 5; a clamping block 44 is evenly fixedly connected to the bottom of the annular groove 43; a locking groove 51 is penetrated by the end surface of the second turntable 5; the locking groove 51 is arranged corresponding to the annular groove 43; a locking block 52 is slidably connected in the locking groove 51; the locking block 52 is fixedly connected to a locking handle 53 on one side away from the first turntable 4; the locking handle 53 is connected to the second turntable 5 through a first tension spring 54 on one side close to the second turntable 5; the end of the locking block 52 away from the locking handle 53 can be inserted between adjacent clamping blocks 44 in the annular groove 43.

[0032] In this embodiment, the clamping block 44 is provided with a first guide surface 441 in the circumferential direction; the locking block 52 is provided with a second guide surface 521 in the circumferential direction at one end close to the clamping block 44; the second guide surface 521 contacts the first guide surface 441 when the locking block 52 rotates; the locking block 52 and the clamping block 44 are one-way locked.

[0033] Specifically, the staff will place the two pipe fittings to be welded on the upper surface of the workbench 1, and then when the movable rod 62 is extremely close to the center position of the second turntable 5, the multiple positioning strips 7 will move with the movable rod 62 close to the center of the second turntable 5, and then the staff will pick up the shorter workpiece of the two pipe fittings and put it on the outside of the multiple positioning strips 7 first. Taking the number of positioning strips 7 as an example, after one pipe fitting is put on the outside of the three positioning strips 7, the other pipe fitting is also put on the outside of the three positioning strips 7, and then the second turntable 5 is controlled to remain stationary while the first turntable 4 is controlled to rotate, so that the second turntable 5 and the first turntable 4 are relatively rotated. The outer wall edges of the first turntable 4 and the second turntable 5 are provided with anti-slip parts to prevent the first turntable 4 from slipping. When the second rotating disk 5 slips, the first rotating disk 4 will drive the block 44 in the annular groove 43 to move circumferentially during the rotation of the first rotating disk 4. The block 44 will drive the first guide surface 441 to squeeze the second guide surface 521 on the locking block 52 during the rotation of the first rotating disk 4. The locking block 52 drives the locking handle 53 away from the first rotating disk 4 under the squeezing of the block 44. The first tension spring 54 will be pulled during the process of the locking handle 53 moving away from the first rotating disk 4. The locking block 52 is moved out of the annular groove 43 and retracted into the locking groove 51 for avoidance under the squeezing of the block 44. In this way, the block 44 in the annular groove 43 can pass over the locking block 52 during the rotation of the first rotating disk 4. Since the locking block 52 and the block 44 are one-way locked, the first rotating disk 4 can rotate smoothly relative to the second rotating disk 5. During the process, the three slide grooves 41 will be driven to rotate around the center of the first turntable 4. During the rotation of the first turntable 4, the slider 42 in the slide groove 41 will be driven to rotate around the center of the first turntable 4. The slider 42 will drive the movable rod 62 to generate movement in the circumference of the first turntable 4. The movable rod 62 is movably connected in the guide groove 61. The end of the guide groove 61 close to the center of the second turntable 5 and the end away from the center of the second turntable 5 have a deviation in the circumference of the second turntable 5, that is, the guide groove 61 is inclined on the second turntable 5. The movable rod 62 is guided by the guide groove 61 under the drive of the slider 42, so that the movable rod 62 moves away from the center of the second turntable 5 during the movement along the guide groove 61. During the movement of the movable rod 62, the positioning bar 7 will be driven to move synchronously. This makes the three positioning bars 7 move away from the center of the second turntable 5 driven by their respective movable rods 62, and the three positioning bars 7 can expand on the inner sides of the two pipe fittings during the process of moving away from each other, so that the three positioning bars 7 are close to the inner walls of the pipe fittings after expansion, and when the three positioning bars 7 are about to press against the inner walls of the pipe fittings, the first turntable 4 and the second turntable 5 are stopped from rotating relative to each other, and then the two pipe fittings outside the three positioning bars 7 are moved so that the two pipe fittings are close to and contact each other, thereby avoiding a large weld between the two pipe fittings that affects welding, and as the two pipe fittings contact each other, the first turntable 4 is controlled to rotate relative to the second turntable 5 again, and the three positioning bars 7 will further expand, and the three positioning bars 7 will press against the inner walls of the two pipe fittings, and the first turntable 4 is stopped from rotating relative to the second turntable 5,The first tension spring 54 will pull the lock handle 53 to drive the lock block 52 along the lock groove 51 to approach the first turntable 4, and the end of the lock block 52 away from the lock handle 53 will be stuck between the adjacent blocks 44 in the annular groove 43, so that the first turntable 4 and the second turntable 5 cannot rotate back, so that the three positioning bars 7 remain in the expanded state, and the inner wall of the pipe is clamped and locked. After completing the positioning of the two pipes before welding, the control system will control the adjustment arm 2 to drive the laser head to align with the contact position of the two pipes, and the laser head will emit high-energy laser pulses for welding. During the operation of the laser head, the motor 31 will rotate, and the rotating motor 31 will drive the first turntable 4 to rotate. During the rotation of the first turntable 4, the second turntable 5 and the three movable rods 62 will be driven to rotate synchronously. The three movable rods 62 will drive the three corresponding positioning bars 7 to rotate synchronously. During the rotation of the three positioning bars 7, the two pipes that have completed the welding positioning will be driven to rotate. In this way, the laser welding process of the pipe fitting is completed during the rotation process; after the laser welding of the pipe fitting is completed, the lock handle 53 is moved away from the first turntable 4, and the lock handle 53 will pull the first tension spring 54 and drive the lock block 52 along the lock groove 51 away from the first turntable 4. The lock block 52 will move out of the annular groove 43 and enter the lock groove 51 to avoid, so that the first turntable 4 and the second turntable 5 are unlocked, and then the first turntable 4 and the second turntable 5 are controlled to rotate relative to each other in the opposite direction. During the reverse rotation of the first turntable 4, the slider 42 and the movable rod 62 connected to the slider 42 will be driven to move. The movable rod 62 moves close to the center of the first turntable 4 under the guidance of the guide groove 61. The movable rod 62 will drive the corresponding positioning bar 7 to move, so that the three positioning bars 7 shrink on the inner side of the pipe fitting, thereby releasing the locking of the three positioning bars 7 on the inner wall of the pipe fitting, and finally the laser welded pipe fitting can be removed from the outer side of the positioning bar 7;

[0034] The present invention achieves the clamping and positioning of the pipes before welding by sleeves of two pipes to be welded on the outside of a plurality of positioning strips 7 and controlling the plurality of positioning strips 7 to expand outward. Compared with the existing method of clamping and positioning the pipes using two separate clamps, the present invention has a higher welding positioning efficiency and is less likely to cause the two pipes to be misaligned, thereby improving the efficiency and quality of laser welding.

[0035] Embodiment 2:

[0036] Two movable grooves 71 are provided on the side of the positioning bar 7 away from the central axis of the second turntable 5; the depth of the two movable grooves 71 on the positioning bar 7 becomes shallower as they move away from each other; the bottom of the movable groove 71 close to the second turntable 5 is slidably connected to the first movable block 8; the first movable block 8 is connected to the corresponding groove wall of the movable groove 71 on the side close to the second turntable 5 through a second tension spring 81; the bottom of the movable groove 71 away from the second turntable 5 is slidably connected to the second movable block 9; the side of the second movable block 9 away from the second turntable 5 is connected to the corresponding groove wall of the movable groove 71 through a third tension spring 91.

[0037] In this embodiment, the tension of the second tension spring 81 and the third tension spring 91 are both greater than the gravity of the workpiece to be welded; the tension of the second tension spring 81 is less than the tension of the third tension spring 91; the speed at which the third tension spring 91 pulls the second moving block 9 back is greater than the speed at which the second tension spring 81 pulls the first moving block 8 back.

[0038] Specifically, after the two pipes to be welded are placed outside the three positioning bars 7, the two pipes to be welded are placed in the moving groove 71 close to the second turntable 5 and the moving groove 71 away from the second turntable 5, respectively. The pipe close to the second turntable 5 contacts the first moving block 8, and the pipe away from the second turntable 5 contacts the second moving block 9. Then, the three positioning bars 7 are controlled to move in a direction away from the central axis of the second turntable 5, so that the three positioning bars 7 expand outward. During the outward expansion of the three positioning bars 7, the first moving block 8 and the second moving block 9 are driven away from the central axis of the second turntable 5. The first moving block 8 and the second moving block 9 are away from the central axis of the second turntable 5. One side of the central axis of the second turntable 5 contacts the inner wall of the corresponding pipe, and the plurality of first moving blocks 8 contact the inner wall of the corresponding pipe after their respective positioning strips 7 expand, and static friction is formed between the first moving blocks 8 and the inner wall of the pipe, so that it is difficult for the first moving blocks 8 and the inner wall of the corresponding pipe to move relative to each other. As the positioning strips 7 continue to expand outward, the first moving blocks 8 are squeezed on the inner wall of the pipe, so that the first moving blocks 8 slide in the corresponding moving grooves 71 and move away from the second turntable 5, so that the second tension spring 81 is pulled to complete the power storage process, and the plurality of first moving blocks 8 are pressed against the inner wall of the pipe, so that the plurality of first moving blocks 8 move away from the second turntable 5, it can drive the outer pipe to move away from the second turntable 5; similarly, after the respective positioning bars 7 are expanded, the multiple second moving blocks 9 contact the inner walls of the corresponding pipes, the pipe pressed by the first moving block 8 and the pipe pressed by the second moving block 9 are not the same pipe, and the second moving block 9 forms a static friction force with the inner walls of the corresponding pipes. As the positioning bars 7 continue to expand outward, the second moving block 9 is squeezed on the inner walls of the corresponding pipes, so that the second moving block 9 slides in the corresponding moving groove 71 and moves close to the second turntable 5, so that the third tension spring 91 is pulled to complete the power storage process, and the multiple second moving blocks 9 are pressed against the inner walls of the corresponding pipes, so that the The second moving blocks 9 and the inner wall of the pipe fittings are difficult to produce relative movement, so that the multiple second moving blocks 9 drive the pipe fittings to move closer to the second turntable 5. In this way, during the outward expansion of the three positioning bars 7, the first moving block 8 and the second moving block 9 will cooperate to make the two pipe fittings to be welded move closer to each other by themselves until the two pipe fittings to be welded are pressed against each other, so that the weld formed by the two pipe fittings to be welded is minimized, eliminating the step of workers moving the two pipe fittings closer to each other, and facilitating the welding of the pipe fittings; after the two pipe fittings are pressed against each other, the further expansion of the positioning bars 7 is stopped, so that the positioning process before the welding of the two pipe fittings is completed;

[0039] After completing the laser welding of the two pipe fittings, the two pipe fittings form a whole. As the two or three positioning strips 7 shrink inward, the squeezing force of the positioning strip 7 on the second moving block 9 in the moving groove 71 is reduced, and the pulling force of the second tension spring 81 is less than the pulling force of the third tension spring 91, so that the speed at which the second tension spring 81 pulls the first moving block 8 is less than the speed at which the third tension spring 91 pulls the second moving block 9. In this way, during the inward contraction of the three positioning strips 7, the third tension spring 91 first pulls the second moving block 9 away from the second turntable 5. In addition, the friction between the second moving block 9 and the inner wall of the pipe fitting in contact is also greater than the friction between the first moving block 8 and the inner wall of the pipe fitting. In this way, under the pulling of the third tension spring 91, the second moving block 9 drives the welded pipe fitting away from the second turntable 5, thereby assisting the welded pipe fitting to be removed from the three positioning strips 7.

[0040] Embodiment 3:

[0041] The first moving block 8 and the second moving block 9 are provided with a compensation groove 82 on one side away from the central axis of the second turntable 5 ; a compensation block 83 is slidably connected in the compensation groove 82 ; the compensation block 83 is connected to the bottom of the compensation groove 82 via a first spring 84 .

[0042] Specifically, in the process of the three positioning bars 7 expanding outward, the three positioning bars 7 will drive the first moving block 8 and the second moving block 9 away from the central axis of the second turntable 5, and the first moving block 8 and the second moving block 9 will drive the corresponding compensation block 83 to contact the inner wall of the outer pipe. The compensation block 83 is squeezed and will overcome the first spring 84 and retract into the compensation groove 82. Due to the action of the compensation block 83 on the side of the first moving block 8 and the second moving block 9 away from the central axis of the second turntable 5, and the elastic force of the first spring 84, the compensation block 83 contacts the inner wall of the pipe, and two pipes with different inner diameters can be clamped and positioned, thereby improving the application range of welding positioning.

[0043] Embodiment 4:

[0044] An adjustment groove 55 is provided on the end surface of the second turntable 5 along the axial direction of the second turntable 5; a plurality of the adjustment grooves 55 are evenly distributed around the center of the second turntable 5; an adjustment block 6 is slidably connected in the adjustment groove 55; the guide groove 61 is provided on the adjustment block 6; the adjustment block 6 can move along the adjustment groove 55 toward or away from the center of the second turntable 5.

[0045] In this embodiment, the wall of the adjustment groove 55 is provided with a plurality of square grooves 56; the plurality of square grooves 56 are sequentially away from the center of the second turntable 5; an L-shaped groove 63 is provided on the side of the adjustment block 6 that is in sliding contact with the adjustment groove 55; the other end of the L-shaped groove 63 is connected to the side of the adjustment block 6 away from the first turntable 4; an L-shaped block 64 is slidably connected inside the L-shaped groove 63; the L-shaped block 64 is connected to the wall of the L-shaped groove 63 by a second spring 65; one end of the L-shaped block 64 can be inserted into the corresponding square groove 56, and the other end extends out of the L-shaped groove 63.

[0046] Specifically, before the staff uses the welding positioning system to work, the staff can adjust the adjustment block 6 according to the requirements of the inner diameter and shape of the pipe to be welded, specifically, control the second turntable 5 and the first turntable 4 to rotate relative to each other, so that the slide groove 41 corresponds to the adjustment groove 55 one by one, and the length direction of the slide groove 41 corresponds to the length direction of the adjustment groove 55, and then the end of the L-shaped block 64 is toggled to overcome the second spring 65 and slide along the L-shaped groove 63. After the L-shaped block 64 is toggled, one end of the L-shaped block 64 will move out of the corresponding square groove 56, so that the adjustment block 6 and the adjustment groove 55 are unlocked, and then the single or multiple Or all the adjustment blocks 6 are moved away from the central axis of the second turntable 5 in turn. When some of the adjustment blocks 6 are moved away from the central axis of the second turntable 5, the multiple positioning strips 7 can be expanded to meet the requirements of clamping and positioning the inner walls of pipes of different shapes. When all the adjustment blocks 6 are at the same distance away from the central axis of the second turntable 5, the movable range of the multiple positioning strips 7 is improved, so that the multiple positioning strips 7 can clamp and position the inner walls of pipes of different inner diameters. After the adjustment of the adjustment block 6 is completed, the L-shaped block 64 is released, and one end of the L-shaped block 64 is inserted into the corresponding square groove 56 in the second spring 65 to lock the adjustment block 6 in the adjustment groove 55.

[0047] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A laser welding positioning system, comprising a workbench and an adjustment arm at the rear of the upper surface of the workbench; the end of the adjustment arm is fixedly connected to the welding head; characterized in that: The upper surface of the workbench is fixedly connected to a support block; the support block is rotatably connected to the output shaft of the motor; the outer wall of the motor is fixedly connected to the support block through a fixed block; the output shaft of the motor is fixedly connected to the first turntable; the end surface of the first turntable is evenly provided with slide grooves around the center; the slide groove is arranged to penetrate along the axial direction of the first turntable; the slide block is slidably connected to the slide groove; the first turntable is rotatably connected to the second turntable at the center of the side facing away from the motor; the end surface of the second turntable is evenly provided with inclined guide grooves around the center; the guide groove is arranged to penetrate along the axial direction of the second turntable; the guide groove is movably connected to a movable rod; one end of the movable rod is fixedly connected to the corresponding slider, and the other end is fixedly connected to a positioning strip; the positioning strip extends below the welding head; the guide groove can drive multiple positioning strips to move away or approach synchronously when the second turntable rotates; The end surface of the second turntable is provided with an adjustment groove extending axially through the second turntable; a plurality of the adjustment grooves are evenly distributed around the center of the second turntable; an adjustment block is slidably connected in the adjustment groove; the guide groove is provided on the adjustment block; the adjustment block can move along the adjustment groove toward or away from the center of the second turntable.

2. A laser welding positioning system according to claim 1, characterized in that: A circular groove coaxial with the first turntable is provided on one side of the first turntable close to the second turntable; a clamping block is evenly fixedly connected to the bottom of the circular groove; a locking groove is penetrated by the end surface of the second turntable; the locking groove and the circular groove are arranged correspondingly; a locking block is slidably connected in the locking groove; a side of the locking block away from the first turntable is fixedly connected to a locking handle; a side of the locking handle close to the second turntable is connected to the second turntable through a first tension spring; an end of the locking block away from the locking handle can be inserted between adjacent clamping blocks in the circular groove.

3. A laser welding positioning system according to claim 2, characterized in that: The clamping block is provided with a first guide surface in the circumferential direction; the locking block is provided with a second guide surface in the circumferential direction at one end close to the clamping block; the second guide surface contacts the first guide surface when the locking block rotates; the locking block and the clamping block are unidirectionally locked.

4. A laser welding positioning system according to claim 1, characterized in that: Two movable grooves are provided on a side of the positioning bar away from the central axis of the second turntable; the depths of the two movable grooves on the positioning bar become shallower as they move away from each other; the bottom of the movable groove close to the second turntable is slidably connected to the first movable block; the first movable block is connected to the corresponding movable groove wall on a side close to the second turntable through a second tension spring; the bottom of the movable groove away from the second turntable is slidably connected to the second movable block; the side of the second movable block away from the second turntable is connected to the corresponding movable groove wall through a third tension spring.

5. A laser welding positioning system according to claim 4, characterized in that: The tension of the second tension spring and the third tension spring is greater than the gravity of the workpiece to be welded; the tension of the second tension spring is less than the tension of the third tension spring; the speed at which the third tension spring pulls the second moving block back is greater than the speed at which the second tension spring pulls the first moving block back.

6. A laser welding positioning system according to claim 4, characterized in that: The first moving block and the second moving block are provided with a compensation groove on one side away from the central axis of the second turntable; the compensation block is slidably connected in the compensation groove; and the compensation block is connected to the bottom of the compensation groove via a first spring.

7. A laser welding positioning system according to claim 1, characterized in that: The adjusting groove wall is provided with a plurality of square grooves; the plurality of square grooves are sequentially away from the center of the second turntable; an L-shaped groove is provided on a side of the adjusting block that is in sliding contact with the adjusting groove; the other end of the L-shaped groove is connected to a side of the adjusting block that is away from the first turntable; an L-shaped block is slidably connected in the L-shaped groove; the L-shaped block is connected to the L-shaped groove wall by a second spring; one end of the L-shaped block can be inserted into the corresponding square groove, and the other end extends out of the L-shaped groove.

Images