Annular welding positioner for tubular target

Abstract

The invention relates to the field of tubular target welding positioning, in particular to a tubular target annular welding positioner which comprises a welding support, a tubular target support movably connected to the left side of the top of the welding support, a back plate support movably connected to the right side of the top of the welding support and linked with the welding support through a transmission mechanism, and a submerged arc welding gun support movably installed in the middle of the welding support. And the clamping mechanism is movably mounted at the upper part of the tubular target bracket and is used for clamping and positioning the tubular target. According to the annular welding positioner for the tubular target, the tubular target support, the clamping mechanism, the gap adjusting mechanism and other components are used in cooperation, when the tubular target is clamped through the clamping mechanism, a clamping rod on the clamping mechanism drives a positioning ring to move horizontally, and the positioning ring drives a limiting screw on the gap adjusting mechanism to move synchronously; the welding gap between the tubular target and the back plate on the tubular target support and the back plate support is adjusted and controlled, the welding gap between the tubular target and the back plate is automatically adjusted according to different thicknesses of the clamped tubular target, and the welding efficiency and the welding precision are improved.

Description

Technical Field

[0001] This invention relates to the field of tubular target welding positioning, specifically a tubular target annular welding positioner. Background Technology

[0002] Tubular sputtering targets refer to sputtering targets with a ring structure, which are mainly used in semiconductor chip manufacturing and photovoltaic coating applications. Before sputtering, tubular targets need to be welded to a backing plate. Generally, tubular targets and backing plates are circumferentially welded using submerged arc welding, a type of arc welding. The welding positioner is an important tool to ensure the welding quality of tubular targets and backing plates.

[0003] The following problems exist in the existing technology that have not been well resolved: 1. Since a welding gap needs to be left between the tubular target and the back plate during the submerged arc welding operation to ensure penetration and weld formation, and the welding gap is different for tubular targets of different thicknesses, some existing tubular target annular welding positioners are difficult to automatically adjust the welding gap between the tubular target and the back plate during the clamping and positioning of tubular targets of different thicknesses. They need to be adjusted separately, which affects the welding efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a tubular target annular welding positioner to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a tubular target annular welding positioner, comprising: a welding support, wherein a tubular target bracket is movably connected to the left side of its top and a back plate bracket is movably connected to the right side, the two being linked by a transmission mechanism, and a submerged arc welding torch bracket is movably installed in the middle of the welding support; It also includes: a clamping mechanism that is movably mounted on the upper part of the tubular target support for clamping and positioning the tubular target; A gap adjustment mechanism, which is installed on the lower part of the tubular target support and cooperates with the clamping mechanism, is used to adjust the welding gap between the tubular target and the back plate. The three-jaw gripper is rotatably connected to the upper part of the back plate bracket. Synchronous gears are fixed on its right side and the left side of the gripping mechanism, and synchronous movement is achieved through the transmission mechanism.

[0005] Preferably, the transmission mechanism includes: two symmetrical pads fixed to the top of the welded support, with a transmission rod rotatably connected between them; The transmission gear ring, which is rotatably connected to the side wall of the tubular target support and the back plate support, is slidably sleeved on the surface of the transmission rod and meshes with the adjacent synchronous gear. The electric telescopic cylinder fixed on the pad block has its movable end fixed to the side wall of the tubular target support and the back plate support, respectively. A drive motor fixed on the left side pad drives the drive rod to rotate.

[0006] Preferably, the clamping mechanism includes: a T-shaped positioning plate, which is rotatably mounted on the upper part of the tubular target support, with an electric push rod fixed in the middle, and a guide groove opened at its movable end; The movable groove inside the T-shaped positioning plate contains a movable toothed disc, which is slidably connected to the guide groove via a guide rack. Clamping bar that slides along the side wall of the movable gear disc; Rotate the adjusting ring connected to the right side of the T-shaped positioning plate. The clamping bar, located away from the axis of the movable toothed plate, is slidably set on the surface of the adjusting ring, and the outer wall of the adjusting ring is symmetrically fixedly connected with positioning pins. A positioning ring is slidably set on the surface of the T-shaped positioning disk. An adjusting ring is linked to the positioning ring through a positioning pin, driving the positioning ring to translate on the surface of the T-shaped positioning disk.

[0007] Preferably, there are four guide grooves, which are equidistantly spaced along the circumference at the movable end of the electric push rod. The four movable slots are equidistantly spaced along the circumference inside the T-shaped positioning disk. The movable slots are provided with slots that cooperate with the guide racks. The four guide racks correspond one-to-one with the four guide grooves.

[0008] Preferably, the right side of the T-shaped positioning plate is provided with a strip groove that cooperates with the clamping bar, and the right end of the clamping bar is fixedly sleeved with an anti-slip rubber sleeve. The movable toothed disc has symmetrical movable arc grooves on the side away from the guide rack, and the two clamping bars are respectively slidably disposed inside the two movable arc grooves; The surface of the adjusting ring is provided with four adjusting arc grooves at equal intervals along the circumference, and four clamping bars located away from the axis of the movable gear disc are respectively slidably disposed inside the four adjusting arc grooves.

[0009] Preferably, the outer ring of the positioning ring is symmetrically provided with driving arc grooves, the outer ring of the T-shaped positioning disk is symmetrically provided with positioning arc grooves, and the two positioning pins respectively pass through the two positioning arc grooves and are slidably disposed inside the corresponding driving arc grooves.

[0010] Preferably, the gap adjustment mechanism includes: a transmission groove inside the tubular target support, a U-shaped transmission plate slidably disposed inside, a positioning rod that cooperates with the positioning ring fixed on its right side, and a transmission toothed plate slidably disposed vertically inside the transmission groove; A limiting groove is formed at the lower part of the tubular target support, and a limiting screw sleeve is rotatably connected inside it. The lower part of the transmission toothed plate meshes with the surface of the limiting screw sleeve. The limiting screw is threaded into the limiting sleeve, and its left end is slidably connected to the inner wall of the limiting groove.

[0011] Preferably, a slider is fixedly connected to the left end of the limiting screw, and a sliding groove is provided on the inner wall of the limiting groove. The limiting screw is slidably disposed inside the sliding groove by the slider. A limiting bearing is fixedly connected between the outer ring of the limiting screw sleeve and the inner wall of the limiting groove; A vertical groove is provided between the limiting groove and the corresponding transmission groove. The transmission toothed plate is movably inserted inside the vertical groove. A retaining ring is fixedly connected to the middle of the transmission toothed plate. A compression spring is fixedly connected between the inner wall of the vertical groove and the bottom of the retaining ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, by using components such as welding support, tubular target support and clamping mechanism in combination, the inner and outer walls of the tubular target are simultaneously clamped and positioned by the clamping mechanism during the welding process, so as to avoid deformation of the thin-walled tubular target during the clamping process, which would affect the welding quality.

[0013] In this invention, through the coordinated use of components such as the tubular target support, clamping mechanism, and gap adjustment mechanism, when the tubular target is clamped by the clamping mechanism, the clamping bar on the clamping mechanism drives the positioning ring to translate, causing the positioning ring to drive the limit screw on the gap adjustment mechanism to move synchronously, thereby regulating the welding gap between the tubular target and the back plate on the tubular target support and the back plate support. By adjusting the thickness of the clamped tubular target, the welding gap between it and the back plate is automatically adjusted, thereby improving welding efficiency and welding accuracy. Attached Figure Description

[0014] Figure 1 This is a perspective view showing the positions of the tubular target support and the backplate support of the present invention. Figure 2 This is a side sectional view of a portion of the welding support and tubular target bracket of the present invention; Figure 3 This is a front view of the overall structure of the present invention; Figure 4 This is a cross-sectional view of a portion of the tubular target support and the T-shaped positioning disk of the present invention; Figure 5 This is a cross-sectional view of a portion of the tubular target support and the limiting groove of the present invention; Figure 6 This is a side sectional view of a portion of the T-shaped positioning disk and the movable groove of the present invention; Figure 7 This is a side sectional view of a portion of the T-shaped positioning disk and the electric push rod of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 This is a side sectional view of a portion of the movable toothed disc and the clamping rod of the present invention; Figure 10 This is a right sectional view of a portion of the movable toothed disc and movable arc groove of the present invention; Figure 11 This is a side sectional view of a portion of the T-shaped positioning disk and positioning ring of the present invention; Figure 12 This is an exploded view of the T-shaped positioning disk and adjusting ring of the present invention.

[0015] In the diagram: 1. Welding support; 2. Tubular target support; 3. Backplate support; 4. Transmission mechanism; 401. Pad; 402. Transmission rod; 403. Transmission gear ring; 404. Electric telescopic cylinder; 405. Transmission motor; 5. Submerged arc welding torch support; 6. Clamping mechanism; 601. T-shaped positioning plate; 602. Electric push rod; 603. Guide groove; 604. Movable groove; 605. Movable gear plate; 606. Guide rack; 607. Clamping bar; 608. Adjusting ring; 609. Positioning pin; 610. Positioning ring; 612. Strip groove; 613. Movable arc groove; 614. Adjusting arc groove; 615. Driving arc groove; 616. Positioning arc groove; 7. Gap adjustment mechanism; 701. Transmission groove; 702. U-shaped transmission plate; 703. Positioning rod; 704. Transmission toothed plate; 705. Limiting groove; 706. Limiting screw sleeve; 707. Limiting screw; 8. Three-jaw gripper; 9. Synchronizing gear. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1 to 12 This invention provides a technical solution: a tubular target annular welding positioner, comprising: a welding support 1; a tubular target support 2 movably connected to the left side of the top of the welding support 1; a back plate support 3 movably connected to the right side of the top of the welding support 1; a transmission mechanism 4 movably connected between the tubular target support 2 and the back plate support 3; and a submerged arc welding torch support 5 movably mounted in the middle of the welding support 1. It should be noted that the transmission mechanism 4 drives the tubular target support 2 and the back plate support 3 to move relative to each other, causing the tubular target and the back plate to move to a position below the submerged arc welding torch support 5 for welding processing; the submerged arc welding torch support 5 is prior art and will not be described in detail here.

[0018] It also includes a clamping mechanism 6 that is movably mounted on the upper part of the tubular target support 2, for clamping and positioning the tubular target.

[0019] The gap adjustment mechanism 7, which is installed on the lower part of the tubular target support 2 and cooperates with the clamping mechanism 6, is used to adjust the welding gap between the tubular target and the back plate.

[0020] A three-jaw gripper 8 is rotatably connected to the upper part of the backplate support 3. Synchronous gears 9, which cooperate with the transmission mechanism 4, are fixedly connected to the right side of the three-jaw gripper 8 and the left side of the clamping mechanism 6. It should be noted that the three-jaw gripper 8 and the clamping mechanism 6 are coaxially arranged, enabling the clamping mechanism 6 to weld the tubular target coaxially with the backplate on the three-jaw gripper 8, ensuring welding position accuracy. A connecting bearing is fixedly connected between the outer ring of the three-jaw gripper 8 and the inner ring of the upper part of the backplate support 3. The transmission mechanism 4 drives the two synchronous gears 9 to rotate synchronously, enabling the tubular target and the backplate to rotate and weld synchronously.

[0021] In this embodiment, as Figures 1 to 12 As shown, the transmission mechanism 4 includes two pads 401, which are symmetrically fixed to the top of the welding support 1. A transmission rod 402 is rotatably connected between the two pads 401, and the transmission rod 402 is movably inserted between the tubular target support 2 and the back plate support 3. It should be noted that the lower part of the tubular target support 2 and the back plate support 3 has insertion holes that cooperate with the transmission rod 402 to avoid interference during the rotation of the transmission rod 402.

[0022] Both the tubular target support 2 and the backplate support 3 are rotatably connected to transmission gear rings 403 on their side walls. The transmission gear rings 403 are slidably disposed on the surface of the transmission rod 402, with their tops meshing with the bottoms of adjacent synchronous gears 9. It should be noted that the transmission rod 402 has a moving groove on its surface, and a moving block is fixedly connected to the inner ring of the transmission gear ring 403. The transmission gear ring is slidably disposed inside the moving groove via the moving block. When the tubular target support 2 and the backplate support 3 move relative to or away from each other, the corresponding transmission gear ring 403 slides on the surface of the transmission rod 402. During the rotation of the transmission rod 402, the two transmission gear rings 403 rotate synchronously, causing them to mesh with the corresponding synchronous gears 9, thereby driving the tubular target and the backplate to rotate. Bearings are fixedly connected between the side walls of the tubular target support 2 and the backplate support 3 and the surface of the corresponding transmission gear ring 403 to ensure stable rotation of the transmission gear ring 403.

[0023] Electric telescopic cylinders 404 are symmetrically fixedly connected to the surface of the pad 401. The side walls of the tubular target bracket 2 and the back plate bracket 3 are respectively fixedly connected to the movable ends of the corresponding electric telescopic cylinders 404. A transmission motor 405 that cooperates with the transmission rod 402 is fixedly connected to the surface of the left pad 401.

[0024] In this embodiment, as Figures 1 to 12As shown, the clamping mechanism 6 includes: a T-shaped positioning plate 601 rotatably mounted on the upper part of the tubular target support 2; an electric push rod 602 fixedly connected to the middle of the T-shaped positioning plate 601; and a guide groove 603 formed on the surface of the movable end of the electric push rod 602. It should be noted that: a mounting hole for the electric push rod 602 is provided at the axial center of the T-shaped positioning plate 601 to ensure stable extension and retraction of the electric push rod 602 within the T-shaped positioning plate 601; a mounting bearing is fixedly connected between the outer ring of the T-shaped positioning plate 601 and the inner ring of the upper part of the tubular target support 2 to ensure stable rotation of the T-shaped positioning plate 601 on the upper part of the tubular target support 2.

[0025] The T-shaped positioning disc 601 has an internal movable groove 604. A movable gear disc 605 is rotatably connected inside the movable groove 604. A guide rack 606 is meshed with the side wall of the movable gear disc 605. One end of the guide rack 606 passes through the movable groove 604 and is slidably connected to a corresponding guide groove 603. It should be noted that when the electric push rod 602 extends, the guide groove 603 at the movable end of the electric push rod 602 slides with the lower part of the guide rack 606, causing the guide rack 606 to rise inside the movable groove 604 and mesh with the movable gear disc 605, driving the movable gear disc 605 to rotate. A positioning bearing is fixedly connected between the end of the movable gear disc 605 and the inner wall of the movable groove 604.

[0026] The movable gear disk 605 has symmetrically sliding clamping rods 607 on its sidewalls. An adjusting ring 608 is rotatably connected to the right side of the T-shaped positioning disk 601. The clamping rods 607, located away from the axis of the movable gear disk 605, are slidably disposed on the surface of the adjusting ring 608. It should be noted that an adjusting bearing is fixedly connected between the inner ring of the adjusting ring 608 and the surface of the T-shaped positioning disk 601, ensuring that the adjusting ring 608 rotates stably on the right side of the T-shaped positioning disk 601. During the rotation of the movable gear disk 605, the two clamping rods 607 can move relative to or away from each other on the sidewalls of the movable gear disk 605. The relatively moving clamping rods 607 can clamp and position the tubular target, and this clamping method avoids deforming the thin-walled tubular target, improving the stability of the thin-walled tubular target positioning and clamping.

[0027] A positioning pin 609 is symmetrically fixedly connected to the outer wall of the adjusting ring 608. A positioning ring 610 that cooperates with the gap adjustment mechanism 7 is slidably disposed on the outer wall of the T-shaped positioning disk 601. One end of the positioning pin 609 passes through the T-shaped positioning disk 601 and is slidably disposed on the surface of the positioning ring 610. It should be noted that: rectangular blocks are symmetrically fixedly connected to the outer wall of the T-shaped positioning disk 601. Rectangular grooves are symmetrically opened on the inner ring of the positioning ring 610. Two rectangular blocks are slidably disposed inside the two rectangular grooves respectively, so that the positioning ring 610 can stably translate on the surface of the T-shaped positioning disk 601. When the clamping bar 607, which is away from the axis of the movable toothed disk 605, moves, it drives the adjusting ring 608 to rotate, so that the adjusting ring 608 drives the positioning ring 610 to translate on the surface of the T-shaped positioning disk 601 through the positioning pin 609. The positioning ring 610 drives the gap adjustment mechanism 7 to operate.

[0028] In this embodiment, as Figures 1 to 12 As shown, there are four guide grooves 603, which are equidistantly spaced along the circumference at the movable end of the electric push rod 602.

[0029] Four movable slots 604 are provided, equidistantly spaced along the circumference inside the T-shaped positioning disk 601. Each movable slot 604 has a slot that engages with a guide rack 606. The four guide racks 606 correspond one-to-one with the four guide grooves 603. It should be noted that a guide pin is fixedly connected to the side of the guide rack 606 away from the movable gear disk 605, and the guide pin is slidably positioned inside the corresponding guide groove 603.

[0030] In this embodiment, as Figures 1 to 12 As shown, the right side of the T-shaped positioning disk 601 is provided with a strip groove 612 that cooperates with the clamping rod 607, and the right end of the clamping rod 607 is fixedly sleeved with an anti-slip rubber sleeve.

[0031] The movable gear disk 605 has symmetrical movable arc grooves 613 on the side away from the guide rack 606, and two clamping rods 607 are slidably disposed inside the two movable arc grooves 613 respectively. It should be noted that: because the two movable arc grooves 613 are symmetrically arranged, when the movable gear disk 605 rotates, the movable arc grooves 613 and the ends of the clamping rods 607 slide together, so that the two clamping rods 607 move relative to each other or in opposite directions along the trajectory of the strip groove 612.

[0032] The surface of the adjusting ring 608 has four equidistant adjusting arc grooves 614 along its circumference. Four clamping rods 607, located away from the axis of the movable gear disc 605, are slidably disposed inside the four adjusting arc grooves 614. It should be noted that when the clamping rods 607 move along the trajectory of the strip groove 612, the moving clamping rods 607 cooperate with the adjusting arc grooves 614 on the surface of the adjusting ring 608 to slide, causing the adjusting ring 608 to rotate to the right side of the T-shaped positioning disc 601.

[0033] In this embodiment, as Figures 1 to 12 As shown, the outer ring of the positioning ring 610 has symmetrically formed drive arc grooves 615, and the outer ring of the T-shaped positioning disk 601 has symmetrically formed positioning arc grooves 616. Two positioning pins 609 pass through the two positioning arc grooves 616 respectively and are slidably disposed inside the corresponding drive arc grooves 615. It should be noted that when the adjusting ring 608 rotates along the trajectory of the positioning arc grooves 616 on the surface of the T-shaped positioning disk 601 with the positioning pins 609, the positioning pins 609 cooperate with the drive arc grooves 615 on the surface of the positioning ring 610 to slide, so that the positioning ring 610 translates along the preset trajectory of the outer ring of the T-shaped positioning disk 601.

[0034] In this embodiment, as Figures 1 to 12 As shown, the gap adjustment mechanism 7 includes a transmission groove 701 formed inside the tubular target support 2. A U-shaped transmission plate 702 is slidably disposed inside the transmission groove 701. A positioning rod 703 that cooperates with the positioning ring 610 is fixedly connected to the right side of the U-shaped transmission plate 702. It should be noted that there are two transmission grooves 701, which are symmetrically formed inside the tubular target support 2.

[0035] A transmission toothed plate 704 is vertically slidably disposed in the middle of the U-shaped transmission plate 702. A limiting groove 705 that mates with the U-shaped transmission plate 702 is formed on the lower part of the inner wall of the tubular target support 2. A limiting screw sleeve 706 is rotatably connected inside the limiting groove 705. The outer wall of the limiting screw sleeve 706 meshes with the lower part of the corresponding transmission toothed plate 704. It should be noted that: transmission grooves are symmetrically formed on the surface of the U-shaped transmission plate 702, and transmission pins are symmetrically fixedly connected to the upper part of the transmission toothed plate 704. The two transmission pins are slidably disposed inside the two transmission grooves respectively.

[0036] The limiting sleeve 706 has an internal threaded connection to a limiting screw 707 that mates with the back plate bracket 3. The left end of the limiting screw 707 is slidably disposed inside the limiting groove 705. It should be noted that when the positioning ring 610 moves, it pushes the positioning rod 703 into the transmission groove 701, causing the positioning rod 703 to drive the U-shaped transmission plate 702 to slide against the transmission toothed plate 704. The transmission toothed plate 704 then moves downwards to engage with the limiting sleeve 706. Under the action of the limiting bearing, the limiting sleeve 706 can only rotate, while the limiting screw 707, which is internally threaded with the limiting sleeve 706, moves horizontally along the slide groove trajectory. When the back plate bracket 3 and the tubular target bracket 2 move relative to each other, the horizontally adjusted limiting screw 707 can prevent them from getting too close. The limiting screw 707 can be preset to prevent this. The extension length of 07 can indirectly control the welding gap between the tubular target on the tubular target support 2 and the back plate on the back plate support 3; and the more the clamping rod 607 moves, the thinner the clamped tubular target becomes, and the longer the positioning ring 610 moves against the positioning rod 703. Then, during the engagement of the transmission tooth plate 704 and the limiting screw sleeve 706, the limiting screw 707 extends a longer distance towards the back plate support 3, thereby effectively reducing the gap between the tubular target and the back plate. Conversely, the thicker the clamped tubular target, the shorter the distance the limiting screw 707 extends towards the back plate support 3, increasing the gap between the tubular target and the back plate.

[0037] In this embodiment, as Figures 1 to 12 As shown, a slider is fixedly connected to the left end of the limiting screw 707, and a sliding groove is provided on the inner wall of the limiting groove 705. The limiting screw 707 is slidably disposed inside the sliding groove through the slider.

[0038] A limiting bearing is fixedly connected between the outer ring of the limiting sleeve 706 and the inner wall of the limiting groove 705. It should be noted that the limiting bearing is designed so that the limiting sleeve 706 can only rotate and cannot move.

[0039] A vertical groove is provided between the limiting groove 705 and the corresponding transmission groove 701. The transmission tooth plate 704 is movably inserted inside the vertical groove. A retaining ring is fixedly connected to the middle of the transmission tooth plate 704. A compression spring is fixedly connected between the inner wall of the vertical groove and the bottom of the retaining ring. When the electric push rod (602) retracts and resets, the positioning ring (610) moves and resets in coordination with the clamping mechanism 6. At this time, the compression spring presses against the retaining ring and the transmission tooth plate (704) to rise and reset, so that the right end of the positioning rod (703) is always in contact with the positioning ring (610).

[0040] The method of use and advantages of the present invention: The working process of the tubular target annular welding positioner is as follows: like Figures 1 to 12As shown, in use, the back plate is first clamped and positioned by the three-jaw gripper 8 on the back plate bracket 3, and then the tubular target is placed between the eight clamping bars 607 on the right side of the T-shaped positioning disk 601. The four clamping bars 607 at the axis of the T-shaped positioning disk 601 support the inner circle of the tubular target. Then, the electric push rod 602 is extended. During the sliding process of the guide groove 603 at the movable end of the electric push rod 602 and the lower part of the guide rack 606, the guide rack 606 moves upward inside the movable groove 604. Then, the guide rack 606 meshes with the movable gear 605 for transmission. The rotating movable gear 605 slides with the end of the clamping bar 607 through the movable arc groove 613, so that the two adjacent clamping bars 607 move relative to each other along the trajectory of the corresponding strip groove 612. At the same time, the inner and outer walls of the tubular target are clamped and positioned. By clamping on both sides, the deformation of the thin-walled tubular target is avoided, ensuring the welding quality. During the movement of the four clamping rods 607 on the outer ring of the T-shaped positioning disk 601, they slide in conjunction with the adjusting arc groove 614 on the surface of the adjusting ring 608, causing the adjusting ring 608 to rotate inside the T-shaped positioning disk 601. At this time, the positioning pin 609 on the outer ring of the adjusting ring 608 slides along the trajectory of the positioning arc groove 616 on the side wall of the T-shaped positioning disk 601, and the sliding positioning pin 609 slides in conjunction with the driving arc groove 615 on the positioning ring 610, thereby driving the positioning ring 610 to translate in the outer ring position of the T-shaped positioning disk 601. Then, the positioning ring 610 presses against the positioning rod 703 and moves into the transmission groove 701. During the synchronous movement of the U-shaped transmission plate 702 with the positioning rod 703, the transmission groove on the surface of the U-shaped transmission plate 702 slides in conjunction with the transmission pin on the upper part of the transmission toothed plate 704. At this time, the transmission toothed plate 704 moves down and engages with the limiting screw sleeve 706. The outer ring meshing transmission causes the limiting screw 707, which is connected to the internal thread of the limiting screw sleeve 706, to move horizontally along the sliding groove track opened on the inner wall of the limiting groove 705 during the rotation of the limiting screw sleeve 706. This adjusts the distance between the right end of the limiting screw 707 and the back plate support 3. Then, the electric telescopic cylinder 404 on the transmission mechanism 4 is activated to extend, causing the tubular target support 2 and the back plate support 3 to move relative to each other. When the limiting screw 707 contacts the side wall of the back plate support 3, a welding gap is left between the end of the tubular target and the opposite surface of the back plate. Then, the transmission motor 405 drives the transmission rod 402 and the transmission gear ring 403 to rotate synchronously. The two transmission gear rings 403 mesh with the synchronous gear 9 respectively, causing the T-shaped positioning plate 601 to rotate synchronously with the clamped tubular target and the back plate on the three-jaw gripper 8. Then, the tubular target and the back plate are welded through the submerged arc welding gun support 5. Because the welding gap between the back plate and the end of the tubular target varies during the welding process of tubular targets of different thicknesses, the clamping mechanism 6, during the clamping of the tubular target, causes the movement of the clamping rod 607 to synchronously drive the adjustment ring 608, the positioning pin 609 and the positioning ring 610 to move. The positioning ring 610 drives the gap adjustment mechanism 7 to operate synchronously, so that the movement distance of the limit screw 707 is synchronously adjusted according to the movement of the clamping rod 607. This allows the welding gap between the tubular target and the back plate to be automatically adjusted according to the different thicknesses of the tubular target, thereby improving welding efficiency and welding accuracy.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tubular target annular welding positioner, comprising: The welding support (1) is movably connected to the tubular target support (2) on the left side of its top and to the back plate support (3) on the right side. The two are linked by a transmission mechanism (4). The welding support (1) is movably installed with a submerged arc welding gun support (5) in the middle. The feature is that it further includes: a clamping mechanism (6) movably installed on the upper part of the tubular target support (2) for clamping and positioning the tubular target; A gap adjustment mechanism (7) is installed on the lower part of the tubular target support (2) and cooperates with the clamping mechanism (6) to adjust the welding gap between the tubular target and the back plate; The three-jaw gripper (8) is rotatably connected to the upper part of the back plate bracket (3). Synchronous gears (9) are fixed on its right side and the left side of the gripping mechanism (6), and synchronous movement is achieved through the transmission mechanism (4).

2. The tubular target annular welding positioner according to claim 1, characterized in that: The transmission mechanism (4) includes: two pads (401) symmetrically fixed on the top of the welded support (1), and a transmission rod (402) rotatably connected between them. The transmission gear ring (403) that is rotatably connected to the side wall of the tubular target support (2) and the back plate support (3) is slidably sleeved on the surface of the transmission rod (402) and meshes with the adjacent synchronous gear (9); The electric telescopic cylinder (404) fixed on the pad (401) has its movable end fixed to the side wall of the tubular target support (2) and the back plate support (3), respectively. A drive motor (405) fixed on the left side pad (401) drives the drive rod (402) to rotate.

3. The tubular target annular welding positioner according to claim 2, characterized in that: The clamping mechanism (6) includes: a T-shaped positioning plate (601), which is rotatably mounted on the upper part of the tubular target support (2), with an electric push rod (602) fixed in the middle, and a guide groove (603) opened at its movable end. An active groove (604) is provided inside the T-shaped positioning plate (601), and an active toothed plate (605) is provided inside the active toothed plate (605). The active toothed plate (605) is slidably connected to the guide groove (603) through the guide rack (606). Clamping rod (607) that slides on the side wall of movable toothed disc (605); The adjusting ring (608) is rotatably connected to the right side of the T-shaped positioning disk (601), and the clamping rod (607) located away from the axis of the movable toothed disk (605) is slidably set on the surface of the adjusting ring (608), and the outer wall of the adjusting ring (608) is symmetrically fixedly connected to the positioning pin (609). The positioning ring (610) is slidably set on the surface of the T-shaped positioning disk (601). The adjusting ring (608) is linked with the positioning ring (610) through the positioning pin (609) to drive the positioning ring (610) to translate on the surface of the T-shaped positioning disk (601).

4. The tubular target annular welding positioner according to claim 3, characterized in that: The guide groove (603) is provided in four parts, and the four guide grooves (603) are equally spaced along the circumference at the movable end of the electric push rod (602); The four movable slots (604) are provided. The four movable slots (604) are equidistantly opened in the interior of the T-shaped positioning disk (601) along the circumference. The interior of the movable slots (604) is provided with slots that cooperate with the guide racks (606). The four guide racks (606) correspond one-to-one with the four guide grooves (603).

5. The tubular target annular welding positioner according to claim 4, characterized in that: The right side of the T-shaped positioning plate (601) is provided with a strip groove (612) that cooperates with the clamping rod (607), and the right end of the clamping rod (607) is fixedly sleeved with an anti-slip rubber sleeve. The movable toothed disc (605) has symmetrical movable arc grooves (613) on the side away from the guide rack (606), and the two clamping rods (607) are respectively slidably disposed inside the two movable arc grooves (613). The surface of the adjusting ring (608) is provided with four adjusting arc grooves (614) at equal intervals along the circumference, and four clamping rods (607) located away from the axis of the movable toothed disc (605) are respectively slidably disposed inside the four adjusting arc grooves (614).

6. The tubular target annular welding positioner according to claim 5, characterized in that: The outer ring of the positioning ring (610) is symmetrically provided with driving arc grooves (615), and the outer ring of the T-shaped positioning disk (601) is symmetrically provided with positioning arc grooves (616). The two positioning pins (609) pass through the two positioning arc grooves (616) respectively and are slidably disposed inside the corresponding driving arc grooves (615).

7. The tubular target annular welding positioner according to claim 6, characterized in that: The gap adjustment mechanism (7) includes: a transmission groove (701) inside the tubular target support (2), a U-shaped transmission plate (702) is slidably arranged inside, and a positioning rod (703) that cooperates with the positioning ring (610) is fixed on its right side. A transmission toothed plate (704) is vertically slidable inside the transmission groove (701). A limiting groove (705) is opened at the lower part of the tubular target support (2), and a limiting screw sleeve (706) is rotatably connected inside it. The lower part of the transmission tooth plate (704) meshes with the surface of the limiting screw sleeve (706). The limiting screw (707) is threaded into the limiting sleeve (706), and its left end is slidably connected to the inner wall of the limiting groove (705).

8. The tubular target annular welding positioner according to claim 7, characterized in that: The left end of the limiting screw (707) is fixedly connected to a slider, and the inner wall of the limiting groove (705) is provided with a sliding groove. The limiting screw (707) is slidably disposed inside the sliding groove by the slider. A limiting bearing is fixedly connected between the outer ring of the limiting screw sleeve (706) and the inner wall of the limiting groove (705); A vertical groove is provided between the limiting groove (705) and the corresponding transmission groove (701). The transmission tooth plate (704) is movably inserted inside the vertical groove. A retaining ring is fixedly connected to the middle of the transmission tooth plate (704). A compression spring is fixedly connected between the inner wall of the vertical groove and the bottom of the retaining ring.

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