Welding fixture

Abstract

The welding clamp comprises a connecting arm, the two ends of the connecting arm are rotationally connected with connecting discs through universal joints, the connecting discs are outwards provided with movable covers, the movable covers are connected with contact discs, magnetic suction cups are slidably connected into the movable covers, and threaded holes are formed in the connecting discs in a penetrating mode; the magnetic suction cup is rotationally connected with a threaded shaft in threaded connection with the threaded hole. The universal joint comprises a ball head sleeve connected with one end of the connecting arm and a universal ball head connected with the connecting disc, a telescopic sliding hole is inwards formed in the bottom of the ball head sleeve, limiting sliding holes are formed in the two ends of the connecting arm, telescopic extrusion shafts are slidably connected into the telescopic sliding holes, and the telescopic extrusion shafts are connected with limiting sliding shafts slidably connected with the limiting sliding holes. The two ends of the connecting arm are rotationally connected with fan-shaped rotating chucks, arc-shaped sliding grooves in sliding connection with the limiting sliding shafts are formed in the fan-shaped rotating chucks, and the fan-shaped rotating chucks are connected with handles. The positioning device can be freely adjusted in multiple directions according to requirements, and diversified positioning requirements during welding can be met.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing equipment, in particular to a welding fixture. Background Art

[0002] Positioning is a crucial link in the welding process of mechanical parts. In traditional welding methods, if there is a lack of proper positioning and fixation, parts will be displaced during the welding process due to thermal deformation, uneven force or vibration, resulting in reduced welding quality or even failure to perform. For example, for the welding of certain precision parts or large structures, if the parts move during the welding process, it will not only affect the welding quality, but may also cause serious safety problems. Therefore, in order to ensure welding quality and improve work efficiency, welding positioning technology came into being.

[0003] Early welding positioning was mainly achieved by fixtures or fixtures. These devices have complex structures, are inconvenient to operate, and can only perform simple straight-line or right-angle positioning. For some complex or non-right-angle welding angles, it is difficult to achieve effective positioning. With the advancement of technology, many welding positioners have appeared on the market. These positioners mainly use the principle of magnetic attraction to fix two parts together through magnetic force to achieve positioning. Compared with traditional fixtures or fixtures, magnetic welding positioners have the advantages of easy operation and strong adaptability.

[0004] However, existing welding positioners still have some limitations. Most existing welding positioners can only perform welding positioning at right angles or certain specific angles. In the actual production process, the welding angles and positions between two parts are varied, or there are obstacles at the welding position that make it difficult to use the positioner to position the edge, making it difficult for existing welding fixtures or positioners to meet diverse welding needs. Summary of the invention

[0005] The purpose of the present invention is to provide a welding fixture that can be freely adjusted in multiple directions according to needs and can meet diverse positioning needs during welding.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a welding fixture, comprising a connecting arm, both ends of the connecting arm are rotatably connected to connecting plates through universal joints, a movable cover is provided outwardly on a side of each connecting plate away from the connecting arm, a contact plate is connected to a side of each movable cover away from the corresponding connecting plate, each contact plate is parallel to the corresponding connecting plate, a magnetic suction cup is slidably connected in each movable cover, a threaded hole is provided through the middle of each connecting plate, a threaded shaft threadedly connected to the corresponding threaded hole is rotatably connected to the middle of each magnetic suction cup, and a knob is provided on one end of each threaded shaft extending out of the corresponding threaded hole;

[0007] The lockhole that is formed on the two ends of the support frame is formed on the upper and lower ends of the support frame, and the lockhole that is formed on the two ends of the support frame is formed on the upper and lower ends of the support frame.

[0008] By adopting the above technical solution, when welding, first select a plane of the main body, put a contact plate in contact with the plane, and turn the knob to rotate the threaded shaft to gradually move the magnetic suction cup close to the main body, so that the device is sucked on the main body. Similarly, the part to be welded is contacted with another contact plate and sucked by the magnetic suction cup, and then the part is moved to the position where the main body needs to be welded, and the angle is adjusted;

[0009] After the adjustment is completed, the handle is turned. The rotation of the handle drives the fan-shaped rotating chuck to rotate through the rotating connecting piece, so that the limit sliding shaft slides along the arc-shaped sliding groove. During the process, the telescopic extrusion shaft is pushed by the limit sliding shaft to gradually squeeze the universal ball head outward to limit the rotation of the universal ball head.

[0010] When welding is completed and the device needs to be removed, first turn the handle in the opposite direction. The handle drives the fan-shaped rotating chuck to rotate, causing the limit sliding shaft to slide along the arc-shaped sliding groove, driving the telescopic extrusion shaft to gradually retract inward without squeezing the universal ball head, and the universal ball head resumes rotation. Finally, turn the two knobs in the opposite direction, and pull the magnetic suction cup gradually closer to the connecting disk and away from the target through the threaded shaft. The magnetic attraction to the target gradually decreases, and the device can be removed.

[0011] The present invention is further configured as follows: a plurality of ventilation holes are provided on the side wall of each movable cover.

[0012] The present invention is further configured as follows: a connecting hole is provided through each magnetic chuck, and each threaded shaft is provided with a T-shaped connecting shaft rotatably connected to the connecting hole.

[0013] The present invention is further configured as follows: an outward end of each telescopic extrusion shaft is connected to an elastic rubber extrusion section matched with a corresponding universal ball head.

[0014] The present invention is further configured as follows: each arc-shaped slide groove is provided with a limit slot in the circular direction of the corresponding fan-shaped rotating chuck, a T-shaped rotating shaft is provided on the outer side of each fan-shaped rotating chuck near the corresponding limit slot, each handle is provided with a rotating connecting piece rotatably connected to the corresponding T-shaped rotating shaft, each rotating connecting piece is provided with a connecting hole rotatably connected to the T-shaped rotating shaft, an extrusion protrusion is provided at one end of each rotating connecting piece away from the corresponding handle, and each fan-shaped rotating chuck is provided with a limit strip on both sides of the corresponding rotating connecting piece, and a gap is left between each limit strip and the corresponding rotating connecting piece, so that each extrusion protrusion can squeeze the limit sliding shaft inserted into the corresponding limit slot into the corresponding arc-shaped slide groove for sliding.

[0015] In summary, the present invention has the following beneficial effects:

[0016] First, the welding positioning device of the present invention has a flexible structure and can freely adjust the positioning angle according to needs. Even if two welding target parts are not in the same plane, they can be positioned after the angle adjustment, which can meet the diverse positioning needs during welding.

[0017] Secondly, after the welding is positioned, the present invention can quickly lock the angle. It only needs to turn the handle to drive the limit sliding shaft to slide through the fan-shaped rotating chuck, and then drive the telescopic pressing shaft to press the universal ball head to limit its rotation, so as to quickly lock the angle.

[0018] Third, when locking the angle, under the action of the elastic rubber extrusion section, the limit sliding shaft rebounds a small section under the action of the elastic rubber extrusion section, so that the limit sliding shaft is stuck in the limit slot to prevent automatic loosening. When the universal ball head needs to be rotated, the handle is turned to drive the rotating connecting piece to rotate, so that the extrusion protrusion on it squeezes the limit sliding shaft into the arc-shaped sliding groove to slide, driving the telescopic extrusion shaft to gradually retract inward without squeezing the universal ball head. The universal ball head resumes rotation, and the contact angle can continue to be locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structural entity of the present invention;

[0020] Figure 2 It is an exploded view used to show the connection between the connection plate, contact plate, magnetic suction cup and threaded shaft;

[0021] Figure 3 Used to demonstrate the connection between the fan-shaped rotating chuck and the connecting arm;

[0022] Figure 4 It is a partial cross-sectional view for showing the telescopic extrusion shaft;

[0023] Figure 5 Used to demonstrate the connection between the fan-shaped rotating chuck and the rotating connecting piece.

[0024] In the figure: 1. connecting arm; 11. telescopic sliding hole; 12. limiting sliding hole; 2. connecting plate; 21. movable cover; 22. vent hole; 23. contact plate; 24. threaded hole; 3. magnetic suction cup; 31. threaded shaft; 32. connecting rotating hole; 33. T-type connecting shaft; 34. knob; 4. universal joint; 41. ball head sleeve; 42. universal ball head; 5. telescopic extrusion shaft; 51. elastic rubber extrusion section; 52. limiting sliding shaft; 6. fan-shaped rotating chuck; 61. arc-shaped sliding groove; 62. limiting slot; 63. T-type rotating shaft; 64. limiting strip; 7. handle; 71. rotating connecting piece; 72. connecting hole; 73. extrusion protrusion. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example, see Figure 1-5A welding fixture comprises a connecting arm 1, both ends of the connecting arm 1 are rotatably connected to a connecting plate 2 through a universal joint 4, a movable cover 21 is provided outwardly on the side of each connecting plate 2 away from the connecting arm 1, a plurality of vent holes 22 are provided on the side wall of each movable cover 21, a contact plate 23 is connected to the side of each movable cover 21 away from the corresponding connecting plate 2, each contact plate 23 is parallel to the corresponding connecting plate 2, a magnetic suction cup 3 is slidably connected in each movable cover 21, and the magnetic suction cup 3 contacts the inner wall of the movable cover 21, A threaded hole 24 is provided through the middle of each connecting disk 2, and a threaded shaft 31 threadedly connected to the corresponding threaded hole 24 is rotatably connected to the middle of each magnetic suction cup 3. A connecting rotating hole 32 is provided through each magnetic suction cup 3, and each threaded shaft 31 is provided with a T-shaped connecting shaft 33 rotatably connected to the connecting rotating hole 32. A knob 34 is provided at one end of each threaded shaft 31 extending out of the corresponding threaded hole 24. By rotating the threaded shaft 31, the magnetic suction cup 3 is displaced relative to the contact disk 23 to adjust the size of the suction force on the target.

[0030] Each universal joint 4 includes a ball sleeve 41 connected to one end of the connecting arm 1, a universal ball head 42 connected to the corresponding connecting plate 2 near the side of the connecting arm 1 and rotatably connected with the corresponding ball sleeve 41, a telescopic sliding hole 11 extending into the connecting arm 1 is opened inwardly at the bottom of each ball sleeve 41, and a limiting sliding hole 12 connected to the corresponding telescopic sliding hole 11 and arranged along its length direction is opened at both ends of each connecting arm 1, a telescopic extrusion shaft 5 is slidably connected in each telescopic sliding hole 11, and an elastic rubber extrusion section 51 matching the corresponding universal ball head 42 is connected to the outward end of each elastic rubber extrusion section 51. One end of each is an arc that matches the corresponding universal ball head 42. Each telescopic extrusion shaft 5 is connected to a limiting sliding shaft 52 that is slidably connected to the corresponding limiting sliding hole 12. Both ends of the connecting arm 1 are rotatably connected to a fan-shaped rotating chuck 6. Each fan-shaped rotating chuck 6 is rotatably connected to the connecting arm 1 at its center. Each fan-shaped rotating chuck 6 is provided with an arc-shaped sliding groove 61 that is slidably connected to the corresponding limiting sliding shaft 52. Each arc-shaped sliding groove 61 gradually approaches the center of the corresponding fan-shaped rotating chuck 6 from one end to the other end. The telescopic extrusion shaft 5 is driven to extend and retract back and forth through the connection between the limiting sliding shaft 52 and the arc-shaped sliding groove 61. Each fan-shaped rotating chuck 6 is connected to a handle 7.

[0031] One end of each arc-shaped slide groove 61 is provided with a limiting slot 62 in the circular direction of the corresponding fan-shaped rotating chuck 6, and a T-shaped rotating shaft 63 is provided on the outer side of each fan-shaped rotating chuck 6 near the corresponding limiting slot 62. Each handle 7 is provided with a rotating connecting piece 71 rotatably connected to the corresponding T-shaped rotating shaft 63. Each rotating connecting piece 71 is provided with a connecting hole 72 rotatably connected to the T-shaped rotating shaft 63. An extrusion protrusion 73 is provided at one end of each rotating connecting piece 71 away from the corresponding handle 7. Each fan-shaped rotating chuck 6 is provided with a limiting strip 64 on both sides of the corresponding rotating connecting piece 71, and a gap is left between each limiting strip 64 and the corresponding rotating connecting piece 71, so that each extrusion protrusion 73 can squeeze the limiting sliding shaft 52 inserted into the corresponding limiting slot 62 into the corresponding arc-shaped slide groove 61 for sliding.

[0032] Working principle: When welding, first select a plane of the main body, put a contact plate 23 in contact with the plane, and turn the knob 34 to rotate the threaded shaft 31 to gradually move the magnetic suction cup 3 close to the main body, so that the device is sucked on the main body. Similarly, the part to be welded is contacted with another contact plate 23 and sucked by the magnetic suction cup 3, and then the part is moved to the position where the main body needs to be welded, and the angle is adjusted;

[0033] After the adjustment is completed, the handle 7 is turned. The rotation of the handle 7 drives the fan-shaped rotating chuck 6 to rotate through the rotating connecting piece 71, so that the limit sliding shaft 52 slides along the arc-shaped sliding groove 61. During the process, the telescopic extrusion shaft 5 is pushed by the limit sliding shaft 52 to gradually squeeze the universal ball head 42 outward to limit the rotation of the universal ball head 42. After rotating to the end, it rebounds a little under the action of the elastic rubber extrusion section 51, so that the limit sliding shaft 52 is stuck in the limit slot 62 to prevent automatic loosening;

[0034] When welding is completed and the device needs to be removed, first rotate the handle 7 in the opposite direction. The rotation of the handle 7 first drives the rotating connecting piece 71 to rotate. The rotating connecting piece 71 squeezes the limiting sliding shaft 52 into the arc-shaped sliding groove 61 through the extrusion protrusion 73 thereon. When the rotating connecting piece 71 contacts the limiting bar 64, it drives the fan-shaped rotating chuck 6 to rotate, so that the limiting sliding shaft 52 slides along the arc-shaped sliding groove 61, driving the telescopic extrusion shaft 5 to gradually retract inward without squeezing the universal ball head 42, and the universal ball head 42 resumes rotation. Finally, rotate the two knobs 34 in the opposite direction, and pull the magnetic suction cup 3 gradually close to the connecting disk 2 and away from the target through the threaded shaft 31. The magnetic attraction to the target gradually decreases, and the device can be removed.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A welding fixture, comprising a connecting arm (1), characterized in that: Both ends of the connecting arm (1) are rotatably connected to the connecting disk (2) via a universal joint (4); a movable cover (21) is provided outwardly on the side of each connecting disk (2) away from the connecting arm (1); a contact disk (23) is connected to the side of each movable cover (21) away from the corresponding connecting disk (2); each contact disk (23) is parallel to the corresponding connecting disk (2); a magnetic suction disk (3) is slidably connected inside each movable cover (21); a threaded hole (24) is provided in the middle of each connecting disk (2); a threaded shaft (31) threadedly connected to the corresponding threaded hole (24) is rotatably connected to the middle of each magnetic suction disk (3); and a knob (34) is provided on one end of each threaded shaft (31) extending out of the corresponding threaded hole (24); Each universal joint (4) comprises a ball sleeve (41) connected to one end of the connecting arm (1), and a universal ball head (42) connected to a side of the corresponding connecting plate (2) close to the connecting arm (1) and rotatably connected to the corresponding ball sleeve (41). The bottom of each ball sleeve (41) is provided with a telescopic sliding hole (11) extending into the connecting arm (1). Both ends of each connecting arm (1) are provided with a limit sliding hole (12) connected to the corresponding telescopic sliding hole (11) and arranged along the length direction thereof. A telescopic extrusion shaft (5) is slidably connected to each telescopic sliding hole (11). The outward end of each telescopic extrusion shaft (5) is connected to the corresponding telescopic sliding hole (11). Corresponding to the arc matched with the universal ball head (42), each telescopic extrusion shaft (5) is connected to a limit sliding shaft (52) slidably connected to the corresponding limit sliding hole (12), both ends of the connecting arm (1) are rotatably connected to a fan-shaped rotating chuck (6), each fan-shaped rotating chuck (6) is rotatably connected to the connecting arm (1) at its center, each fan-shaped rotating chuck (6) is provided with an arc-shaped sliding groove (61) slidably connected to the corresponding limit sliding shaft (52), each arc-shaped sliding groove (61) gradually approaches the center of the corresponding fan-shaped rotating chuck (6) from one end to the other end, and each fan-shaped rotating chuck (6) is connected to a handle (7).

2. A welding fixture according to claim 1, characterized in that: The side wall of each movable cover (21) is provided with a plurality of ventilation holes (22).

3. A welding fixture according to claim 1, characterized in that: A connecting rotating hole (32) is provided through each magnetic chuck (3), and each threaded shaft (31) is provided with a T-shaped connecting shaft (33) rotatably connected to the connecting rotating hole (32).

4. A welding fixture according to claim 1, characterized in that: An outward end of each telescopic extrusion shaft (5) is connected to an elastic rubber extrusion section (51) that matches the corresponding universal ball head (42).

5. A welding fixture according to claim 4, characterized in that: Each arc-shaped slide groove (61) is provided with a limit slot (62) in the circular direction of the corresponding sector-shaped rotating chuck (6); a T-shaped rotating shaft (63) is provided on the outer side of each sector-shaped rotating chuck (6) near the corresponding limit slot (62); each handle (7) is provided with a rotating connecting piece (71) rotatably connected to the corresponding T-shaped rotating shaft (63); each rotating connecting piece (71) is provided with a connecting hole (72) rotatably connected to the T-shaped rotating shaft (63); each A pressing protrusion (73) is provided at one end of a rotating connecting piece (71) away from the corresponding handle (7), and each sector-shaped rotating chuck (6) is provided with a limiting strip (64) on both sides of the corresponding rotating connecting piece (71). A gap is left between each limiting strip (64) and the corresponding rotating connecting piece (71), so that each pressing protrusion (73) can squeeze the limiting sliding shaft (52) inserted into the corresponding limiting slot (62) into the corresponding arc-shaped slot (61) for sliding.

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