Welding positioning device for automobile hinge machining

Abstract

The invention relates to the technical field of automobile machining, in particular to a welding positioning device for automobile hinge machining, which comprises a machining table, an electric telescopic rod is fixedly connected to the rear end of the machining table, a push plate is fixedly connected to the output end of the electric telescopic rod, and a fixing cylinder is fixedly connected to the front end of the inner wall of the machining table. And a spring is fixedly connected to the interior of the fixing barrel, a second limiting block is fixedly connected to the rear end of the spring, a second connecting rod is fixedly connected to the rear end of the second limiting block, an abutting block is fixedly connected to the rear end of the second connecting rod, and auxiliary structures are arranged on the two sides of the machining table. According to the clamping device, the push plate and the abutting block are arranged, the clamping reliability and consistency are guaranteed, the clamping device is superior to a pure manual or rigid clamping mode, an auxiliary structure is arranged, the positioning precision is high, clamping is stable, workpiece deformation and displacement in the welding process can be effectively restrained, and the welding quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of automotive processing technology, and specifically relates to a welding positioning device for automotive hinge processing. Background Technology

[0002] In the automotive body manufacturing process, hinges are key components connecting the doors to the body frame. Their welding quality directly affects the smoothness of door opening and closing, sealing performance, and overall safety. Hinges are typically assembled and welded from multiple stamped or forged metal parts. These components require precise positioning and clamping before welding to ensure that the relative positions of each part fully meet the design drawings, avoiding welding deformation or insufficient strength due to misalignment.

[0003] Existing hinge welding positioning devices rely on simple fixtures combined with manual placement and calibration, or the use of general-purpose vises for clamping. Manual positioning is inefficient, and the positioning accuracy and consistency are difficult to guarantee, directly affecting the product quality stability of mass production. At the same time, general-purpose fixtures often cannot perfectly adapt to the specific irregular structure of the hinge, and uneven force during clamping can easily lead to slight displacement or deformation of the workpiece, or offset under the action of welding thermal stress. Furthermore, traditional unidirectional clamping methods cannot achieve omnidirectional stable fixation, and vibration or rotation can easily occur during welding, affecting the accuracy of the welding path. To address these issues, we propose a welding positioning device for automotive hinge processing. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the present invention aims to provide a welding positioning device for automotive hinge processing, so as to solve the problems mentioned in the background art that the existing hinge welding positioning devices rely on simple clamps and manual placement and calibration, or use general-purpose vises for clamping, which are inefficient, and the positioning accuracy and consistency are difficult to guarantee. In addition, the traditional unidirectional clamping method is prone to vibration or rotation during the welding process, which affects the accuracy of the welding path.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding positioning device for automotive hinge processing, comprising a processing table, a placement plate fixedly connected to the inner wall of the processing table, a mating groove formed on the top of the placement plate, a hinge body movably connected to the top of the mating groove, a switch mounted on the surface of the processing table, an electric telescopic rod fixedly connected to the rear end of the processing table, a push plate fixedly connected to the output end of the electric telescopic rod, auxiliary plates fixedly connected to both sides of the push plate, a connecting rod fixedly connected to the rear end of the auxiliary plates, a limit block fixedly connected to the rear end of the connecting rod, a fixing cylinder fixedly connected to the front end of the inner wall of the processing table, a spring fixedly connected inside the fixing cylinder, and the rear end of the spring... A limiting block two is fixedly connected to the end of the processing table. A connecting rod two is fixedly connected to the rear end of the limiting block two. An abutment block is fixedly connected to the rear end of the connecting rod two. An auxiliary structure is provided on both sides of the processing table. The auxiliary structure includes a throttle. A worm gear is fixedly connected to one side of the throttle. A worm wheel meshes with the surface of the worm gear. An adjusting screw is fixedly connected inside the worm wheel. Slide grooves are opened on the top of both sides of the processing table. Guide rods are fixedly connected inside the slide grooves. Two sets of adjusting blocks are symmetrically slidably connected to the surface of the adjusting screw. A clamping plate is fixedly connected to one side of the adjusting block. A knob is rotatably connected to the top of the clamping plate. A threaded rod is fixedly connected to the bottom of the knob. A pressure plate is fixedly connected to the bottom of the threaded rod.

[0006] Preferably, the hinge body is slidably connected inside the mating groove, and the front and rear ends of the placement plate do not contact the push plate and the abutment block.

[0007] Preferably, the electric telescopic rod is electrically connected to the switch, and the switch is electrically connected to an external power source.

[0008] Preferably, a circular groove is provided at the rear end of the inner wall of the processing table, and the connecting rod is slidably connected in the circular groove. The radius of the limiting block is larger than the radius of the connecting rod.

[0009] Preferably, the fixed cylinder has a circular groove 2 that matches the limiting block 2 inside. The limiting block 2 is slidably connected in the circular groove 2. The radius of the limiting block 2 is larger than the radius of the connecting rod 2. The connecting rod 2 passes through the rear end of the circular groove 2 and is fixedly connected to the limiting block 2.

[0010] Preferably, the surfaces of the push plate, the auxiliary plate, and the abutting block are all provided with rubber pads, and the push plate, the auxiliary plate, and the abutting block abut against the front and rear ends of the hinge body, respectively, and the surface of the abutting block is provided with rounded corners.

[0011] Preferably, the surface of the adjusting screw is provided with two sets of opposite threads, and the two sets of adjusting blocks respectively engage with the two sets of threads.

[0012] Preferably, the surface of the adjusting block is provided with a circular groove three, the adjusting block is slidably connected in the groove, the adjusting block is slidably connected to the surface of the guide rod through the circular groove three, and the guide rod is located directly below the adjusting screw.

[0013] Preferably, the surface of the clamping plate is provided with a threaded groove, and the threaded rod is rotatably connected in the threaded groove.

[0014] Preferably, the clamping plate is C-shaped, the pressure plate is rotatably connected to the inner side of the clamping plate, the pressure plate does not contact the clamping plate, and a rubber pad layer is provided at the bottom of the pressure plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This welding positioning device for automotive hinge processing is equipped with a push plate and a stop block. The push plate, driven by an electric telescopic rod and in cooperation with an auxiliary plate, and the stop block, provided with elastic clamping force by a spring, form a combination of efficient automatic clamping and adaptive elastic clamping in the front-rear direction of the hinge body. This achieves rapid and stable axial positioning of the workpiece. Electric clamping improves efficiency, while elastic clamping can automatically compensate for minor differences in the size of different workpieces and absorb some of the deformation caused by welding thermal stress, ensuring the reliability and consistency of clamping, which is superior to purely manual or rigid clamping methods.

[0016] 2. This welding positioning device for automotive hinge processing incorporates an auxiliary structure. This structure, consisting of a worm gear, worm wheel, adjusting screw with reverse threads, guide rod, and adjusting block, enables synchronous, symmetrical, and self-locking clamping adjustment of both sides of the workpiece. The worm gear mechanism features a large transmission ratio and reverse self-locking characteristics, making the adjustment process labor-saving and ensuring absolute positional fixation after adjustment, preventing loosening due to welding vibration. Combined with a vertically adjustable pressure plate, this device constrains multiple degrees of freedom of the hinge workpiece, achieving high positioning accuracy and stable clamping. It effectively suppresses workpiece deformation and displacement during welding, improving welding quality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram illustrating the structure of the present invention. Figure 3 This is a top sectional view of the structure of the present invention; Figure 4 This is an exploded view of the processing table and electric telescopic rod of the present invention; Figure 5 This is a cross-sectional view of the structure of the fixing cylinder of the present invention; Figure 6 This is a front sectional view of the processing table of the present invention; Figure 7 This is an exploded sectional view of the processing table and auxiliary structure of the present invention; Figure 8 This is a partial exploded view of the auxiliary structure of the present invention.

[0018] In the diagram: 1. Processing table; 11. Placement plate; 12. Mating groove; 13. Hinge body; 14. Switch; 2. Electric telescopic rod; 21. Push plate; 22. Auxiliary plate; 23. Connecting rod one; 24. Limiting block one; 3. Fixing cylinder; 31. Spring; 32. Limiting block two; 33. Connecting rod two; 34. Abutting block; 4. Auxiliary structure; 41. Turn handle; 42. Worm gear; 43. Worm wheel; 44. Adjusting screw; 45. Slide groove; 46. Guide rod; 47. Adjusting block; 48. Clamping plate; 49. Knob; 410. Threaded rod; 411. Pressure plate. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-8 One embodiment provided by the present invention: A welding positioning device for automotive hinge processing includes a processing table 1. A placement plate 11 is fixedly connected to the inner wall of the processing table 1. A mating groove 12 is formed on the top of the placement plate 11. A hinge body 13 is movably connected to the top of the mating groove 12. A switch 14 is installed on the surface of the processing table 1. An electric telescopic rod 2 is fixedly connected to the rear end of the processing table 1. A push plate 21 is fixedly connected to the output end of the electric telescopic rod 2. Auxiliary plates 22 are fixedly connected to both sides of the push plate 21. A connecting rod 23 is fixedly connected to the rear end of the auxiliary plates 22. A limit block 24 is fixedly connected to the rear end of the connecting rod 23. A fixed... A fixed cylinder 3 has a spring 31 fixedly connected inside. A limit block 32 is fixedly connected to the rear end of the spring 31. A connecting rod 33 is fixedly connected to the rear end of the limit block 32. An abutment block 34 is fixedly connected to the rear end of the connecting rod 33. Auxiliary structures 4 are provided on both sides of the processing table 1. Each auxiliary structure 4 includes a throttle 41. A worm gear 42 is fixedly connected to one side of the throttle 41. A worm wheel 43 meshes with the surface of the worm gear 42. An adjusting screw 44 is fixedly connected inside the worm wheel 43. Slide grooves 45 are opened on the top of both sides of the processing table 1. Guide rods 46 are fixedly connected inside the slide grooves 45. The surface of the adjusting screw 44 slides symmetrically. The hinge body 13 has two sets of adjusting blocks 47. A clamping plate 48 is fixedly connected to one side of the adjusting block 47. A knob 49 is rotatably connected to the top of the clamping plate 48. A threaded rod 410 is fixedly connected to the bottom of the knob 49. A pressure plate 411 is fixedly connected to the bottom of the threaded rod 410. A push plate 21 and an abutment block 34 are provided. Driven by the electric telescopic rod 2 and cooperating with the auxiliary plate 22, the push plate 21 and the abutment block 34, which is provided with elastic clamping force by the spring 31, form a combination of efficient automatic clamping and adaptive elastic clamping in the front and rear directions of the hinge body 13. This achieves rapid and stable axial positioning of the workpiece, and the electric clamping improves efficiency. The elastic clamping mechanism automatically compensates for minor differences in workpiece dimensions and absorbs some of the deformation caused by welding thermal stress, ensuring the reliability and consistency of clamping. This is superior to purely manual or rigid clamping methods. An auxiliary structure 4, consisting of a worm gear 42, a worm wheel 43, an adjusting screw 44 with a reverse thread, a guide rod 46, and an adjusting block 47, enables synchronous, symmetrical, and self-locking clamping adjustment on both sides of the workpiece. The worm wheel 43 and worm gear 42 mechanism has a large transmission ratio and reverse self-locking characteristics, making the adjustment process labor-saving and ensuring absolute positional fixation after adjustment, preventing loosening due to welding vibration. Combined with a vertically adjustable pressure plate 411, this device constrains multiple degrees of freedom of the hinged workpiece, providing high positioning accuracy and stable clamping. It effectively suppresses workpiece deformation and displacement during welding, improving welding quality.

[0021] Furthermore, the hinge body 13 is slidably connected inside the mating groove 12, and the front and rear ends of the placement plate 11 do not contact the push plate 21 and the abutment block 34, ensuring that the hinge body 13 can move smoothly back and forth along the mating groove 12 for initial approximate alignment. At the same time, it leaves the necessary operating space for the clamping action of the push plate 21 and the abutment block 34, preventing the structure of the placement plate 11 from interfering with the movement stroke of the main clamping components and ensuring the effective transmission of clamping force.

[0022] Furthermore, the electric telescopic rod 2 is electrically connected to the switch 14, and the switch 14 is electrically connected to an external power source. Through the circuit connection, the electric telescopic rod 2 is electrically controlled. The operator only needs to touch the switch 14 to drive the push plate 21 to perform clamping or releasing actions, which greatly simplifies the operation steps, improves clamping efficiency, and makes the application of clamping force more stable and controllable, which is superior to the traditional manual screw force application method.

[0023] Furthermore, a circular groove is provided at the rear end of the inner wall of the processing table 1. The connecting rod 23 is slidably connected in the circular groove. The radius of the limiting block 24 is larger than the radius of the connecting rod 23. The circular groove provides precise guidance for the sliding of the connecting rod 23, ensuring that the push plate 21 and the auxiliary plate 22 move in a straight line without swaying. The limiting block 24 forms an effective mechanical stop, preventing the entire connecting rod 23 from coming out of the circular groove when the electric telescopic rod 2 retracts excessively, thus enhancing the reliability and safety of the mechanism.

[0024] Furthermore, the interior of the fixed cylinder 3 is provided with a circular groove 2 that matches the limiting block 2 32. The limiting block 2 32 is slidably connected in the circular groove 2. The radius of the limiting block 2 32 is larger than the radius of the connecting rod 2 33. The connecting rod 2 33 passes through the rear end of the circular groove 2 and is fixedly connected to the limiting block 2 32. The circular groove 2 provides a stable space for the limiting block 2 32 and the spring 31 to accommodate and move, so that the compression and rebound of the spring 31 always proceed along the axial direction. The large radius design of the limiting block 2 32 restricts its movement inside the fixed cylinder 3. At the same time, the elastic force of the spring 31 is reliably transmitted to the external abutment block 34 through the connecting rod 2 33, forming a compact and directly force-transmitting elastic clamping unit.

[0025] Furthermore, the surfaces of the push plate 21, the auxiliary plate 22, and the abutment block 34 are all provided with rubber pads. The push plate 21, the auxiliary plate 22, and the abutment block 34 abut against the front and rear ends of the hinge body 13, respectively. The surface of the abutment block 34 is provided with rounded corners. The rubber pads have the functions of buffering, anti-slip, and friction enhancement. They can protect the surface of the hinge body 13 from scratches caused by direct metal contact and provide greater static friction to prevent the workpiece from slipping after clamping. The rounded corner design of the abutment block 34 makes it easy for the hinge body 13 to smoothly squeeze the abutment block 34 back when it is inserted, guiding the workpiece to be positioned smoothly and reducing the clamping difficulty.

[0026] Furthermore, the surface of the adjusting screw 44 is provided with two sets of opposite threads, and the two sets of adjusting blocks 47 are respectively engaged with the two sets of threads. When the adjusting screw 44 is rotated, the two sets of threads with opposite directions drive the two adjusting blocks 47 to move synchronously towards or away from each other along the guide rod 46, thereby realizing that the clamping plates 48 on both sides approach or leave the workpiece at the same time, ensuring that the clamping force is applied evenly and symmetrically to both sides of the workpiece.

[0027] Furthermore, the surface of the adjusting block 47 is provided with a circular groove three. The adjusting block 47 is slidably connected in the slide groove 45. The adjusting block 47 is slidably connected to the surface of the guide rod 46 through the circular groove three. The guide rod 46 is located directly below the adjusting screw 44. The slide groove 45 restricts the adjusting block 47 to move only on a specific path, while the cooperation between the guide rod 46 and the circular groove three provides precise linear guidance, effectively preventing the adjusting block 47 from rotating under the drive of the adjusting screw 44, ensuring that the movement trajectory of the clamping plate 48 is a strictly straight line, thereby ensuring the accuracy and stability of lateral clamping.

[0028] Furthermore, the surface of the clamping plate 48 is provided with a threaded groove, and the threaded rod 410 is rotatably connected in the threaded groove. The threaded connection converts the rotation of the knob 49 into the precise vertical lifting and lowering movement of the threaded rod 410 and the pressure plate 411, allowing the operator to finely adjust the pressing height and pressure of the pressure plate 411 by controlling the number of rotations, thus realizing the controllable adjustment of the clamping force above the workpiece.

[0029] Furthermore, the clamping plate 48 is C-shaped, and the pressure plate 411 is rotatably connected to the inner side of the clamping plate 48. The pressure plate 411 does not contact the clamping plate 48. A rubber pad is provided at the bottom of the pressure plate 411. The C-shaped structure allows the clamping plate 48 to form a semi-enclosed clamping space from the side and top of the workpiece, providing more comprehensive constraints. The rotatable connection design between the pressure plate 411 and the clamping plate 48 allows the bottom plane of the pressure plate 411 to adaptively fit against the upper surface of the workpiece when clamping. Even if the upper surface of the workpiece is slightly tilted or irregular, surface contact clamping can be achieved, improving the reliability and stability of clamping. The rubber pad at the bottom also plays a protective and anti-slip role.

[0030] Working principle: In use, the operator first aligns the bottom of the hinge body 13 to be welded with the mating groove 12 on the placement plate 11 and places it in. After the workpiece is in place, the operator activates the electric telescopic rod 2 via switch 14. The push rod of the electric telescopic rod 2 extends forward, driving the push plate 21 and auxiliary plate 22 to move forward as a whole. The push plate 21 tightly abuts against the designated position at the rear end of the hinge body 13, and the front end of the hinge body 13 contacts and pushes forward the abutment block 34 with rounded corners. The abutment block 34 compresses the spring 31 and moves forward. The rear end of the hinge body 13 is actively pressed by the push plate 21, and the front end is elastically pressed by the spring 31 through the abutment block 34, thus being firmly fixed in the front-back direction. Next, the operator rotates the handle 41, which drives the worm gear 42 to rotate, thereby driving the worm wheel 43 and the adjusting screw 4. 4. Rotate the screw 44. The two reverse threads on the screw 44 drive the two adjusting blocks 47 to move synchronously along the guide rod 46 until they reach the appropriate position. The self-locking characteristic of the worm gear 43 and worm 42 ensures that the position will not loosen on its own once it is determined. Finally, rotate the knobs 49 on the clamping plates 48 on both sides in sequence. The knobs 49 drive the threaded rod 410 and the pressure plate 411 to descend, so that the rubber pad at the bottom of the pressure plate 411 is pressed smoothly against the upper surface of the workpiece that needs to be constrained. At this point, the hinge body 13 is reliably positioned and clamped in multiple directions, allowing for precise welding operations. After welding is completed, the workpiece can be removed by loosening the clamping parts in reverse order. The entire device achieves fast, accurate, stable and flexible clamping through the combination of mechanics and electrical systems, and is particularly suitable for the welding positioning requirements of automotive hinge parts.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A welding positioning device for processing automotive hinges, comprising a processing table (1), characterized in that: A placement plate (11) is fixedly connected to the inner wall of the processing table (1). A mating groove (12) is provided on the top of the placement plate (11). A hinge body (13) is movably connected to the top of the mating groove (12). A switch (14) is installed on the surface of the processing table (1). An electric telescopic rod (2) is fixedly connected to the rear end of the processing table (1). A push plate (21) is fixedly connected to the output end of the electric telescopic rod (2). An auxiliary plate (22) is fixedly connected to both sides of the push plate (21). A connecting rod (23) is fixedly connected to the rear end of the auxiliary plate (22). A limit block (24) is fixedly connected to the rear end of the connecting rod (23). A fixed cylinder (3) is fixedly connected to the front end of the inner wall of the processing table (1). A spring (31) is fixedly connected inside the fixed cylinder (3). A limit block (32) is fixedly connected to the rear end of the spring (31). A connecting rod (2) is fixedly connected to the rear end of the limit block (32). (33), the rear end of the connecting rod (33) is fixedly connected to an abutment block (34), the processing table (1) is provided with auxiliary structures (4) on both sides, the auxiliary structure (4) includes a throttle (41), a worm (42) is fixedly connected to one side of the throttle (41), a worm wheel (43) is meshed on the surface of the worm (42), an adjusting screw (44) is fixedly connected inside the worm wheel (43), a sliding groove (45) is opened on the top of both sides of the processing table (1), a guide rod (46) is fixedly connected inside the sliding groove (45), two sets of adjusting blocks (47) are symmetrically slidably connected to the surface of the adjusting screw (44), a clamping plate (48) is fixedly connected to one side of the adjusting block (47), a knob (49) is rotatably connected to the top of the clamping plate (48), a threaded rod (410) is fixedly connected to the bottom of the knob (49), and a pressure plate (411) is fixedly connected to the bottom of the threaded rod (410).

2. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The hinge body (13) is slidably connected inside the mating groove (12), and the front and rear ends of the placement plate (11) do not contact the push plate (21) and the abutment block (34).

3. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The electric telescopic rod (2) is electrically connected to the switch (14), and the switch (14) is electrically connected to an external power source.

4. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The inner wall of the processing table (1) has a circular groove at the rear end, and the connecting rod (23) is slidably connected in the circular groove. The radius of the limiting block (24) is greater than the radius of the connecting rod (23).

5. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The fixed cylinder (3) has a circular groove (2) inside that matches the limiting block (2) (32). The limiting block (2) (32) is slidably connected in the circular groove (2). The radius of the limiting block (2) (32) is greater than the radius of the connecting rod (2) (33). The connecting rod (2) (33) passes through the rear end of the circular groove (2) and is fixedly connected to the limiting block (2) (32).

6. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The surfaces of the push plate (21), the auxiliary plate (22) and the abutting block (34) are all provided with rubber pads. The push plate (21), the auxiliary plate (22) and the abutting block (34) abut against the front and rear ends of the hinge body (13) respectively. The surface of the abutting block (34) is provided with rounded corners.

7. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The surface of the adjusting screw (44) is provided with two sets of opposite threads, and the two sets of adjusting blocks (47) respectively cooperate with the two sets of threads.

8. The welding positioning device for automotive hinge processing according to claim 1, characterized in that: The surface of the adjusting block (47) is provided with a circular groove three. The adjusting block (47) is slidably connected in the sliding groove (45). The adjusting block (47) is slidably connected to the surface of the guide rod (46) through the circular groove three. The guide rod (46) is located directly below the adjusting screw (44).

9. A welding positioning device for automotive hinge processing according to claim 1, characterized in that: The surface of the clamping plate (48) is provided with a threaded groove, and the threaded rod (410) is rotatably connected in the threaded groove.

10. A welding positioning device for automotive hinge processing according to claim 1, characterized in that: The clamping plate (48) is C-shaped, and the pressure plate (411) is rotatably connected to the inner side of the clamping plate (48). The pressure plate (411) does not contact the clamping plate (48), and a rubber pad layer is provided at the bottom of the pressure plate (411).

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