A welding device for an instrument protection seat
By designing a welding device that includes an electric suction cup, a clamping mechanism, and a rotating mechanism, the problem of poor welding caused by welding torch angle deviation was solved, and stable welding of the protective seat and the top plate was achieved.
Patent Information
- Application Number
- CN202510952655.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2045-07-10
AI Technical Summary
When welding the instrument protection base to the tank top plate, the welding torch angle deviation resulted in poor welding effect and affected the stability of the fixation.
A welding device is adopted, which includes a base plate, a fixed plate, a support plate, an electric suction cup, a clamping mechanism, a first rotating mechanism, and a welding mechanism. The protective seat is fixed by the electric suction cup, and the synchronous rotation and position fixation of the protective seat and the top plate are achieved by the relative movement mechanism and the first rotating mechanism. The welding mechanism ensures the consistency of the welding angle.
It effectively avoids welding torch angle deviation, ensures consistent welding results, and improves the fixing stability of the protective seat and the top plate.
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Figure CN120619710B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] Embodiments of the present application relate to the technical field of welding device, in particular, to a welding device for instrument protection seat. BACKGROUND
[0002] In the use of the storage tank, generally, a diaphragm type instrument is installed on the top plate of the storage tank to detect the gas phase pressure and water flow pressure in the storage tank. However, the diaphragm type instrument is prone to damage under the impact of high-pressure water flow and mechanical vibration of the tank washer. Therefore, in the prior art, a protection seat is generally used to protect the diaphragm type instrument. The protection seat adopts a stainless steel cylindrical main body structure, is fixed with the instrument through a threaded connection, and is provided with four symmetrical circular arc holes at the lower side of the cylinder, with the bottom being sealed, thereby forming an integrated protective shell. The protection seat is adapted to the standard tank top instrument interface, and can effectively absorb and disperse the high-pressure water flow and mechanical impact energy of the tank washer due to the stress dispersion characteristics of the circular arc holes.
[0003] During installation, the protection seat is generally welded to the top plate of the storage tank by a welding gun. However, during the welding process of the protection seat and the top plate, the position of the welding gun needs to be moved circumferentially around the protection seat. During the movement of the welding gun, the angle between the welding gun and the welding joint is prone to deviation, which affects the welding effect and further affects the fixing stability between the protection seat and the top plate. SUMMARY
[0004] To overcome the above-mentioned defects, the present application provides a welding device for instrument protection seat, which solves the technical problem that the welding gun is prone to deviation in angle during welding between the protection seat and the top plate in the prior art.
[0005] According to one aspect, at least one embodiment of the present application provides a welding device for instrument protection seat, comprising a bottom plate, a fixed plate, a support plate, an electric suction cup, a clamping mechanism, a first rotating mechanism, a relative moving mechanism and a welding mechanism. The two ends of the top side wall of the bottom plate are fixedly provided with the fixed plates. The top side wall of the bottom plate is slidably provided with two support plates between the two fixed plates. The support plate is provided with a support hole. The support ring is rotatably arranged in the support hole. The electric suction cup is arranged in one of the support rings. The clamping mechanism is arranged on the support ring for clamping and fixing the electric suction cup and the protection seat. The first rotating mechanism is arranged on the support plate for driving the synchronous rotation of the support ring. The relative moving mechanism is arranged on the support plate for driving the relative movement of the two support plates. The welding mechanism is arranged on the bottom plate for welding between the top plate of the storage tank and the protection seat.
[0006] Preferably, the electric suction cup is provided with a conductive slip ring, and a cable is electrically connected to one end of the conductive slip ring away from the electric suction cup.
[0007] Further, the relative moving mechanism comprises a bidirectional screw and a first motor, the bidirectional screw is rotationally arranged between the two fixing plates, the bidirectional screw penetrates the two support plates through thread cooperation, the first motor is installed on one of the fixing plates, and an output end of the first motor is fixedly connected with the bidirectional screw.
[0008] Still further, the first rotating mechanism comprises a first cavity, a first gear ring, a first gear and a driving mechanism, the first cavity is arranged in the support plate, a driving opening is arranged in the side wall of the first cavity, the first gear ring is fixedly arranged on the outer wall of the support ring, the first gear is rotationally arranged in the first cavity, the first gear is engaged with the first gear ring, the driving mechanism is arranged on the fixing plate and used for driving the first gear to rotate, the driving mechanism comprises a driving prism and a second motor, the driving prism is rotationally arranged between the two fixing plates, the driving prism penetrates the driving opening, the driving prism penetrates the first gear and is slidably connected with the first gear, and the second motor is installed on one of the fixing plates and has an output end fixedly connected with the driving prism.
[0009] Still further, the clamping mechanism comprises a clamping groove, a threaded rod, a second cavity, a second bevel gear and a synchronous rotating mechanism, the inner wall of the support ring is provided with a plurality of clamping grooves, a clamping block is slidably arranged in the clamping groove, the threaded rod is rotationally arranged at the groove bottom of the clamping groove, the threaded rod penetrates into the clamping block through thread cooperation, the second cavity is arranged at one side of the clamping groove, a first bevel gear is rotationally arranged on the side wall of the second cavity, the first bevel gear is fixedly connected with the threaded rod, the second bevel gear is rotationally arranged on the side wall of the second cavity, the second bevel gear is engaged with the first bevel gear, and the synchronous rotating mechanism is arranged in the support ring and used for driving the plurality of second bevel gears to synchronously rotate.
[0010] On the basis of the above scheme, the synchronous rotating mechanism comprises a third cavity, a second tooth ring and a hand wheel, the support ring is provided with the annular third cavity, the second gear is rotatably arranged on one side of the second bevel gear in the third cavity, the connecting rod is fixedly arranged between the second gear and the second bevel gear, the second tooth ring is rotatably arranged in the third cavity, the second tooth ring is engaged with the second gear, and the hand wheel is rotatably arranged on the side wall of the support ring.
[0011] On the basis of the above scheme, the side wall of the clamping block is provided with an arc-shaped clamping groove.
[0012] On the basis of the above scheme, the welding mechanism comprises a cross slide and a welding gun, the cross slide is installed on the bottom plate, the welding gun is installed on the output end of the cross slide, and the welding gun is inclined towards the direction of the electric suction cup.
[0013] The embodiment of the application has the following beneficial effects:
[0014] 1. In the application, the relative movement mechanism and the clamping mechanism are arranged, the hand wheel is rotated to drive the clamping plate to fix the protection seat and the electric suction cup, then the center position of the top plate is fixed by the electric suction cup, at this time, the bidirectional screw is rotated by the working of the first motor, so that the protection seat is abutted on the top plate by the thread cooperation between the bidirectional screw and the support plate, thereby the position of the protection seat and the top plate is fixed and abutted on each other, thereby facilitating the subsequent welding.
[0015] 2. In the application, the first rotating mechanism is arranged, the driving prism is rotated by the working of the second motor, the first gear is rotated by the sliding cooperation between the driving prism and the first gear, and the support ring is rotated by the engagement between the first gear and the first tooth ring, thereby the protection seat and the top plate are driven to rotate synchronously, thereby facilitating the rotation of the butt joint between the protection seat and the top plate and the subsequent welding.
[0016] 3. In the application, the welding mechanism is arranged, the welding gun is contacted with the butt joint between the protection seat and the top plate by the working of the cross slide, and the butt joint between the protection seat and the top plate is welded by the cooperation of the rotation of the protection seat and the top plate, thereby the welding angle is kept consistent during the welding process, thereby avoiding the influence of the welding effect caused by the deviation of the welding angle. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some of the example embodiments of the present application. Other drawings can be obtained by those of ordinary skill in the art without any creative effort on the basis of the contents of the example embodiments of the present application and the drawings.
[0018] Figure 1 FIG. 1 is a structural schematic diagram of a welding device for an instrument protection seat according to an embodiment of the present application;
[0019] Figure 2 FIG. 2 is another structural schematic diagram of the welding device for the instrument protection seat according to the embodiment of the present application;
[0020] Figure 3 FIG. 3 is a structural schematic diagram of a support plate according to the embodiment of the present application;
[0021] Figure 4 FIG. 4 is a structural schematic diagram of a first rotating mechanism according to the embodiment of the present application;
[0022] Figure 5 FIG. 5 is a structural schematic diagram of a clamping mechanism according to the embodiment of the present application;
[0023] Figure 6 FIG. 6 is a structural schematic diagram of a synchronous rotating mechanism according to the embodiment of the present application;
[0024] Figure 7 FIG. 7 is a structural schematic diagram of the protection seat in a working state according to the embodiment of the present application;
[0025] Figure 8 FIG. 8 is a structural schematic diagram of the protection seat according to the embodiment of the present application.
[0026] In the drawings: 1, bottom plate; 2, fixed plate; 3, support plate; 4, support ring; 5, electric suction cup; 6, conductive slip ring; 7, guide rod; 8, bidirectional screw rod; 9, first motor; 10, first cavity; 11, first gear ring; 12, first gear; 13, driving prism; 14, second motor; 15, clamping groove; 16, clamping block; 17, threaded rod; 18, second cavity; 19, first bevel gear; 20, second bevel gear; 21, third cavity; 22, second gear; 23, second gear ring; 24, hand wheel; 25, cross slide; 26, welding gun; 27, protection seat; 28, top plate; 29, support port. DETAILED DESCRIPTION
[0027] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.
[0028] For the purpose of clarity, only the parts of the apparatus that are pertinent to the invention are shown in the drawings, and these do not necessarily represent the actual construction of the product. In addition, for the purpose of clarity, in some of the drawings, only one of the parts having the same structure or function is shown schematically, or only one of them is labeled. In this document, "one" does not necessarily mean "only one", but can mean "more than one", and "several" includes "two" and "more than two".
[0029] In this document, unless otherwise specified or limited, the terms "mount", "connected", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] In the present application, unless otherwise specified or limited, "on" or "under" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature of the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0031] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0032] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0033] As Figures 1-8As shown in the figure, it shows a welding device of an instrument protection seat in an embodiment of the application, which comprises a bottom plate 1, and further comprises a fixed plate 2, a support plate 3, an electric suction cup 5, a clamping mechanism, a synchronous rotating mechanism, a relative moving mechanism and a welding mechanism, both ends of the top side wall of the bottom plate 1 are fixedly provided with the fixed plate 2, and the top side wall of the bottom plate 1 is slidably provided with the two support plates 3 between the two fixed plates 2, the support plate 3 is provided with a support opening 29, the support ring 4 is rotatably arranged in the support opening 29, the electric suction cup 5 is arranged in one of the support rings 4, the clamping mechanism is arranged on the support ring 4 and used for clamping and fixing the electric suction cup 5 and the protection seat 27, the synchronous rotating mechanism is arranged on the support plate 3 and used for driving the support ring 4 to synchronously rotate, the relative moving mechanism is arranged on the support plate 3 and used for driving the two support plates 3 to relatively move, the welding mechanism is arranged on the bottom plate 1 and used for welding between the top plate 28 of the storage tank and the protection seat 27, the electric suction cup 5 is provided with the conductive slip ring 6, and the end of the conductive slip ring 6 away from the electric suction cup 5 is electrically connected with the cable.
[0034] With reference to Figures 1-3 The relative moving mechanism comprises a bidirectional screw 8 and a first motor 9, the bidirectional screw 8 is rotatably arranged between the two fixed plates 2, the bidirectional screw 8 penetrates the two support plates 3 through thread cooperation, the first motor 9 is installed on one of the fixed plates 2, and the output end of the first motor 9 is fixedly connected with the bidirectional screw 8, wherein the two fixed plates 2 are fixedly provided with the guide rod 7, the guide rod 7 penetrates the support plate 3 and is slidably connected with the support plate 3, specifically, the bidirectional screw 8 is driven to rotate through the work of the first motor 9, so that the protection seat 27 can be driven to abut against the top plate 28 through the thread cooperation between the bidirectional screw 8 and the support plate 3, thereby facilitating the position fixing and mutual abutment of the protection seat 27 and the top plate 28, and facilitating the subsequent welding.
[0035] With reference to Figures 2-4The synchronous rotating mechanism comprises a first cavity 10, a first tooth ring 11, a first gear 12 and a driving mechanism. The first cavity 10 is arranged in the support plate 3, and a driving opening is arranged in the side wall of the first cavity 10. The first tooth ring 11 is fixedly arranged on the outer wall of the support ring 4. The first gear 12 is rotatably arranged in the first cavity 10, and the first gear 12 is engaged with the first tooth ring 11. The driving mechanism is arranged on the fixed plate 2 and is used for driving the first gear 12 to rotate. The driving mechanism comprises a driving prism 13 and a second motor 14. The driving prism 13 is rotatably arranged between the two fixed plates 2 and penetrates the driving opening. The driving prism 13 penetrates the first gear 12 and is slidably connected with the first gear 12. The second motor 14 is installed on one of the fixed plates 2. The output end of the second motor 14 is fixedly connected with the driving prism 13. Specifically, the driving prism 13 is driven to rotate by the working of the second motor 14. The first gear 12 is driven to rotate by the sliding cooperation between the driving prism 13 and the first gear 12. The support ring 4 is driven to rotate by the engagement between the first gear 12 and the first tooth ring 11. Thus, the protection seat 27 and the top plate 28 can be driven to synchronously rotate, so that the butt joint between the protection seat 27 and the top plate 28 can be rotated and conveniently welded.
[0036] With reference to Figure 5 With reference to Figure 6The clamping mechanism comprises clamping grooves 15, a threaded rod 17, a second cavity 18, a second bevel gear 20 and a synchronous rotating mechanism. The inner wall of the support ring 4 is provided with a plurality of clamping grooves 15. A clamping block 16 is slidably arranged in the clamping groove 15. The threaded rod 17 is rotatably arranged at the bottom of the clamping groove 15. The threaded rod 17 extends into the clamping block 16 through thread cooperation. The second cavity 18 is arranged on one side of the clamping groove 15. A first bevel gear 19 is rotatably arranged on the side wall of the second cavity 18. The first bevel gear 19 is fixedly connected with the threaded rod 17. The second bevel gear 20 is rotatably arranged on the side wall of the second cavity 18. The second bevel gear 20 is engaged with the first bevel gear 19. The synchronous rotating mechanism is arranged in the support ring 4 and is used to drive the plurality of second bevel gears 20 to rotate synchronously. The synchronous rotating mechanism comprises a third cavity 21, a second tooth ring 23 and a hand wheel 24. The support ring 4 is provided with an annular third cavity 21. A second gear 22 is rotatably arranged in the third cavity 21 on one side of the second bevel gear 20. A connecting rod is fixedly arranged between the second gear 22 and the second bevel gear 20. The second tooth ring 23 is rotatably arranged in the third cavity 21. The second tooth ring 23 is engaged with the second gear 22. The hand wheel 24 is rotatably arranged on the side wall of the support ring 4. A driving rod is fixedly arranged between the hand wheel 24 and the second gear 22. The side wall of the clamping block 16 is provided with an arc-shaped clamping groove. Specifically, the operator rotates the hand wheel 24. The rotation of the hand wheel 24 can drive the second gear 22 to rotate. At the same time, the engagement between the second gear 22 and the second tooth ring 23 drives the plurality of second gears 22 and the plurality of second bevel gears 20 to rotate synchronously. Then, the engagement between the second bevel gear 20 and the first bevel gear 19 drives the first bevel gear 19 and the threaded rod 17 to rotate. Thus, the threaded rod 17 and the positioning block can be driven to clamp and fix the electric suction cup 5 and the protection seat 27 through thread cooperation. Then, the top plate 28 is fixed on the surface of the electric suction cup 5 through vacuum adsorption.
[0037] Referring to Figure 2 The welding mechanism comprises a cross slide 25 and a welding gun 26. The cross slide 25 is installed on the bottom plate 1. The welding gun 26 is installed on the output end of the cross slide 25. The welding gun 26 is inclined towards the electric suction cup 5. Specifically, the cross slide 25 can drive the welding gun 26 to contact the butt joint between the protection seat 27 and the top plate 28. At the same time, the rotation of the protection seat 27 and the top plate 28 can weld the butt joint between the protection seat 27 and the top plate 28. During the welding process, the welding angle can be kept consistent, thereby avoiding the influence of the deviation of the welding angle of the welding gun 26 on the welding effect.
[0038] In the embodiment, in use, the operator extends the electric suction cup 5 and the protection seat 27 into the two support rings 4 respectively, then rotates the hand wheel 24, the rotation of the hand wheel 24 can drive the second gear 22 to rotate, and at the same time, through the meshing of the second gear 22 and the second gear ring 23, the plurality of second gears 22 and the plurality of second bevel gears 20 are driven to rotate synchronously, and then through the meshing of the second bevel gear 20 and the first bevel gear 19, the first bevel gear 19 and the threaded rod 17 are driven to rotate, so that the threaded rod 17 and the positioning block are screwed to drive the positioning block to clamp and fix the electric suction cup 5 and the protection seat 27 respectively, then the top plate 28 is fixed on the surface of the electric suction cup 5 by vacuum adsorption, then the operator controls the first motor 9 to work, and through the working of the first motor 9, the bidirectional screw rod 8 is driven to rotate, so that through the screwing of the bidirectional screw rod 8 and the support plate 3, the protection seat 27 is abutted on the top plate 28, so as to facilitate the position fixing of the protection seat 27 and the top plate 28 and the abutment of each other, then the operator controls the second motor 14 to work, the working of the second motor 14 can drive the driving prism 13 to rotate, and at the same time, through the sliding cooperation of the driving prism 13 and the first gear 12, the first gear 12 is driven to rotate, and then through the meshing of the first gear 12 and the first gear ring 11, the support ring 4 is driven to rotate, so that the protection seat 27 and the top plate 28 are driven to rotate synchronously, in the process of rotating the protection seat 27 and the top plate 28, through the working of the cross slide 25, the welding gun 26 is in contact with the butt joint between the protection seat 27 and the top plate 28, and at the same time, the butt joint between the protection seat 27 and the top plate 28 is welded in cooperation with the rotation of the protection seat 27 and the top plate 28, and in the welding process, the welding angle can be ensured to be consistent, so as to avoid affecting the welding effect due to the deviation of the welding gun 26 angle, at this time, the welding method of the welding gun 26 can adopt resistance welding.
[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.
Claims
1. A welding device for an instrument protection base, comprising a base plate (1), characterized in that, Also includes: The fixing plate (2) is fixedly installed at both ends of the top side wall of the bottom plate (1); Support plate (3), the top side wall of the bottom plate (1) is slidably provided with two support plates (3) between two fixed plates (2), the support plate (3) is provided with a support opening (29), and a support ring (4) is rotatably provided in the support opening (29); An electric suction cup (5) is disposed within one of the support rings (4); A clamping mechanism is provided on the support ring (4) for clamping and fixing the electric suction cup (5) and the protective seat (27); The first rotating mechanism is disposed on the support plate (3) and is used to drive the support ring (4) to rotate; A relative movement mechanism is provided on the support plate (3) for driving the two support plates (3) to move relative to each other; A welding mechanism is provided on the base plate (1) for welding the top plate (28) of the storage tank to the protective seat (27).
2. The welding device for an instrument protection base according to claim 1, characterized in that, A conductive slip ring (6) is installed on the electric suction cup (5), and a cable is electrically connected to the end of the conductive slip ring (6) away from the electric suction cup (5).
3. The welding device for an instrument protection base according to claim 2, characterized in that, The relative movement mechanism includes: A bidirectional screw (8) is rotatably disposed between the two fixed plates (2), and the bidirectional screw (8) passes through the two support plates (3) through a threaded connection. The first motor (9) is mounted on one of the fixed plates (2), and the output end of the first motor (9) is fixedly connected to the bidirectional screw (8).
4. The welding device for an instrument protection base according to claim 3, characterized in that, The first rotating mechanism includes: The first cavity (10) is opened inside the support plate (3), and the side wall of the first cavity (10) is provided with a drive port; The first toothed ring (11) is fixedly disposed on the outer wall of the support ring (4); The first gear (12) is rotatably disposed in the first cavity (10) and meshes with the first gear ring (11); A drive mechanism is provided on the fixed plate (2) and is used to drive the first gear (12) to rotate.
5. The welding device for an instrument protection base according to claim 4, characterized in that, The drive mechanism includes: A driving prism (13) is rotatably disposed between the two fixed plates (2), and the driving prism (13) passes through the driving port; The driving prism (13) passes through the first gear (12) and is slidably connected to the first gear (12); The second motor (14) is mounted on one of the fixed plates (2), and the output end of the second motor (14) is fixedly connected to the drive prism (13).
6. The welding device for an instrument protection base according to claim 5, characterized in that, The clamping mechanism includes: Clamping groove (15): The inner wall of the support ring (4) is provided with a plurality of clamping grooves (15), and a clamping block (16) is slidably disposed in the clamping groove (15). A threaded rod (17) is rotatably disposed at the bottom of the clamping groove (15), and the threaded rod (17) extends into the clamping block (16) through a threaded engagement; The second cavity (18) is opened on one side of the clamping groove (15). The side wall of the second cavity (18) is rotatably provided with a first bevel gear (19), which is fixedly connected to the threaded rod (17). The second bevel gear (20) is rotatably disposed on the side wall of the second cavity (18), and the second bevel gear (20) meshes with the first bevel gear (19); A synchronous rotation mechanism is provided inside the support ring (4) to drive multiple second bevel gears (20) to rotate synchronously.
7. The welding device for an instrument protection base according to claim 6, characterized in that, The synchronous rotation mechanism includes: The third cavity (21) is provided in the support ring (4). The third cavity (21) is provided in the support ring (4). The second gear (22) is rotatably provided in the third cavity (21) on one side of the second bevel gear (20). A connecting rod is fixedly provided between the second gear (22) and the second bevel gear (20). The second gear ring (23) is rotatably disposed in the third cavity (21) and meshes with the second gear (22); A handwheel (24) is rotatably mounted on the side wall of the support ring (4), and a drive rod is fixedly mounted between the handwheel (24) and the adjacent second gear (22).
8. The welding device for an instrument protection base according to claim 7, characterized in that, The side wall of the clamping block (16) is provided with an arc-shaped clamping groove.
9. The welding device for an instrument protection base according to claim 8, characterized in that, The welding mechanism includes: A cross slide (25) is mounted on the base plate (1); The welding torch (26) is installed at the output end of the cross slide (25) and is tilted toward the electric chuck (5).
10. The welding device for an instrument protection base according to claim 9, characterized in that, A guide rod (7) is fixedly provided between the two fixed plates (2). The guide rod (7) passes through the support plate (3) and is slidably connected to the support plate (3).
Citation Information
Patent Citations
Gear box shaft sleeve assembling and welding tool
CN221494876U
Automatic welding device for production of control instrument system
CN222471227U