Automobile machined part bonding jig

Abstract

The utility model belongs to the technical field of machining and forming of automobile parts, and particularly relates to an automobile machined part bonding jig which comprises a bottom plate, a lower die, a pressing mechanism and an upper die, and the lower die is detachably connected to the bottom plate; the pressing mechanism is arranged on the bottom plate and located on one side of the lower die. The upper die is arranged at the output end of the pressing mechanism; wherein the bottom plate is provided with a controllable magnetic attraction mechanism, the output end of the controllable magnetic attraction mechanism faces the lower die, the lower die is provided with a magnetic part, and the controllable magnetic attraction mechanism can attract and fix the lower die on the bottom plate through the magnetic part. Local stress concentration can be avoided through uniform distribution of magnetic attraction force, the positioning stability of the lower die is ensured, meanwhile, adhesive residues are convenient to clean through the detachable design, and the maintenance difficulty is reduced. In addition, the modularized magnetic attraction fixing mode is compatible with rapid switching of lower dies of multiple specifications, and the flexible production capacity of a production line is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing and forming technology, and in particular relates to an automotive parts bonding fixture. Background Technology

[0002] In automotive manufacturing, bonding fixtures are core tooling used to fix and position workpieces (such as body panels, glass, and battery boxes). They ensure the precise relative position of the workpiece and adhesive (such as structural adhesives and sealants) during the curing process through mechanical positioning pins, clamping mechanisms, and adaptable structures. Traditional fixtures typically employ a rigid frame design, fixing positioning modules and clamping units with bolts or welding, relying on manual adjustment or specialized tooling to adapt to different workpiece models. These fixtures can operate stably in mass production of a single model, their structural principle based on mechanical contact positioning and static pressure control to meet the precision and strength requirements of automotive-grade assembly.

[0003] While traditional fixtures perform reliably in specific scenarios, their design struggles to meet the demands of modern flexible manufacturing. Because the fixture structure is highly tied to specific workpiece models, switching production models requires disassembling and reassembling numerous components, resulting in low changeover efficiency and reliance on manual experience. Furthermore, the installation and calibration of mechanical positioning pins are susceptible to human error, and frequent disassembly and reassembly accelerate thread or snap-fit ​​wear, reducing long-term positioning accuracy. Adhesive spillage into the fixture is difficult to clean thoroughly, further increasing maintenance costs and downtime. The insufficient modularity and poor compatibility of existing fixtures have become bottlenecks in multi-product mixed-line production, necessitating an innovative solution that balances high precision, rapid changeover, and low maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide an automotive parts bonding fixture, which aims to solve the technical problem that the structure of the existing automotive parts bonding fixture is highly bound to the specific workpiece model, and a large number of parts need to be disassembled and reassembled when changing production models, resulting in low changeover efficiency and reliance on manual experience, which affects the bonding processing efficiency.

[0005] To achieve the above objectives, this utility model provides an automotive parts bonding fixture, comprising a base plate, a lower mold, a pressing mechanism, and an upper mold. The lower mold is detachably connected to the base plate. The pressing mechanism is disposed on the base plate and located on one side of the lower mold. The upper mold is disposed at the output end of the pressing mechanism. A controllable magnetic attraction mechanism is provided on the base plate, with its output end facing the lower mold. A magnetic element is provided on the lower mold, and the controllable magnetic attraction mechanism can use the magnetic element to firmly attach the lower mold to the base plate.

[0006] Optionally, the lower mold is provided with a receiving groove for accommodating the workpiece to be bonded, the groove opening is arranged facing upwards, and the magnetic component is arranged at the end of the lower mold near the base plate.

[0007] Optionally, the controllable magnetic attraction mechanism includes a control unit and an electromagnetic unit. The electromagnetic unit is laid on the base plate, and the control unit is electrically connected to the electromagnetic unit. The control unit is used to drive the electromagnetic unit to operate, so that the electromagnetic unit generates a magnetic field that can act on the magnetic component.

[0008] Optionally, the electromagnetic unit is an energized coil, the number of electromagnetic units and magnetic components is the same, the number of magnetic components is multiple groups, all the magnetic components are evenly distributed on the lower mold, and all the electromagnetic units are disposed on the base plate; when the lower mold approaches the base plate, the control unit drives the electromagnetic units to operate, so that the magnetic fields generated by all the electromagnetic units attract the corresponding magnetic components one by one.

[0009] Optionally, the lower mold is configured as a cuboid plate structure, the receiving groove is formed at the center of the lower mold, and the number of magnetic components is four sets, which are evenly distributed circumferentially on one side of the corner of the receiving groove.

[0010] Optionally, the base plate is provided with limit posts, and there are multiple sets of limit posts. All the limit posts are circumferentially spaced along a preset path, and the limit posts form a limit cavity for initially limiting the lower mold. All the electromagnetic units are located below the bottom wall of the limit cavity.

[0011] Optionally, the pressing mechanism includes a driving component, a moving component, and a lifting component. The driving component and the moving component are both disposed on the base plate. The lifting component is disposed at the output end of the moving component. The upper mold is disposed at the output end of the moving component. The driving component is used to drive the output end of the lifting component to move towards the base plate, so that the upper mold can press the material to be bonded onto the lower mold.

[0012] Optionally, the moving component includes a guide rail and a first moving seat. The guide rail is laid on the base plate, and the first moving seat is slidably connected to the guide rail. The lifting component is disposed on the first moving seat. There are two sets of lower molds and driving components. The two sets of lower molds are distributed at intervals at both ends of the guide rail, and the driving components are located on one side of the corresponding lower mold.

[0013] Optionally, the driving assembly includes a drive motor and a cam. The drive motor is fixedly mounted on the base plate and located on one side of the lower mold. The cam is tightly connected to the output spindle of the drive motor. When the upper mold moves away from the drive motor, the protruding end of the cam rotates above the output spindle of the drive motor, and the output end of the lifting assembly can drive the upper mold to move to the height range between the cam and the lower mold. When the moving assembly drives the upper mold to move between the cam and the upper mold, the drive motor drives the cam to rotate, so that the protruding end of the cam abuts against and drives the upper mold to move towards the lower mold until the upper mold presses the material to be bonded onto the lower mold.

[0014] Optionally, an angle sensor is provided on the base plate. The angle sensor is located on the end of the drive motor away from the lower mold, and the angle sensor is used to monitor the rotation angle of the output spindle of the drive motor.

[0015] The above-mentioned technical solutions of the automotive processing part bonding fixture provided in this utility model embodiment have at least one of the following technical effects: This technical solution achieves rapid adsorption, fixation and separation of the lower mold and the base plate through the cooperation of the controllable magnetic attraction mechanism and the magnetic component of the lower mold. Compared with the traditional bolt or buckle connection method, it significantly shortens the mold change time and reduces manual intervention; the uniform distribution of magnetic attraction force can avoid local stress concentration and ensure the positioning stability of the lower mold. At the same time, the detachable design facilitates the cleaning of adhesive residue and reduces maintenance difficulty; in addition, the modular magnetic attraction fixing method is compatible with the rapid switching of multiple specifications of lower molds, effectively improving the flexible production capacity of the production line. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the automotive machining part bonding fixture provided in an embodiment of the present utility model.

[0018] Figure 2 for Figure 1 An enlarged view of A in the image.

[0019] Figure 3 This is a schematic diagram of the structure of the lower mold of the automotive parts bonding fixture provided in this embodiment of the present invention after disassembly.

[0020] Figure 4This is a top view of the automotive machining part bonding fixture provided in an embodiment of the present utility model.

[0021] Figure 5 This is a schematic diagram of the lower mold provided in an embodiment of the present utility model.

[0022] The following are the labeling elements in the figure:

[0023] 100—Base plate 200—Lower mold 300—Pressure pressing mechanism

[0024] 400—Upper mold; 500—Controllable magnetic attraction mechanism; 700—Magnetic component

[0025] 600—Receiving slot; 510—Control unit; 520—Electromagnetic unit

[0026] 110—Limit post; 310—Drive assembly; 320—Moving assembly

[0027] 330—Lifting assembly; 321—Guide rail; 322—First moving seat

[0028] 311—Drive motor; 312—Cam; 120—Angle sensor. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-5 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In one embodiment of this utility model, such as Figures 1-5 As shown, an automotive parts bonding fixture is provided, including a base plate 100, a lower mold 200, a pressing mechanism 300, and an upper mold 400. The lower mold 200 is detachably connected to the base plate 100. The pressing mechanism 300 is disposed on the base plate 100 and located on one side of the lower mold 200. The upper mold 400 is disposed at the output end of the pressing mechanism 300. A controllable magnetic attraction mechanism 500 is provided on the base plate 100, with the output end of the controllable magnetic attraction mechanism 500 facing the lower mold 200. A magnetic element 700 is provided on the lower mold 200, and the controllable magnetic attraction mechanism 500 can attract and fix the lower mold 200 to the base plate 100 through the magnetic element 700.

[0034] This technical solution achieves rapid adsorption, fixation, and separation of the lower mold 200 and the base plate 100 through the cooperation of the controllable magnetic attraction mechanism 500 and the magnetic component 700 of the lower mold 200. Compared with traditional bolt or snap-fit ​​connection methods, it significantly shortens the mold change time and reduces manual intervention. The uniform distribution of magnetic attraction force can avoid local stress concentration and ensure the positioning stability of the lower mold 200. At the same time, the detachable design makes it easy to clean adhesive residue and reduces maintenance difficulty. In addition, the modular magnetic fixation method is compatible with the rapid switching of multiple specifications of lower mold 200, effectively improving the flexible production capability of the production line.

[0035] like Figures 1-5As shown, in another embodiment of this utility model, the lower mold 200 is provided with a receiving groove 600 for accommodating the workpiece to be bonded. The groove opening of the receiving groove 600 is facing upwards, and the magnetic component 700 is disposed at the end of the lower mold 200 near the base plate 100. After the operator places the workpiece to be bonded into the receiving groove 600 at the top of the lower mold 200, the lower mold 200 is automatically aligned with the controllable magnetic attraction mechanism 500 of the base plate 100 through the bottom magnetic component 700. The magnetic attraction mechanism is activated to attract the lower mold 200 to the surface of the base plate 100 to complete the fixation. Subsequently, the pressing mechanism 300 drives the upper mold 400 to press down, so that the workpiece and the adhesive are bonded and cured under stable pressure. Compared with the traditional fixing method that requires manual tightening of bolts or buckles, the automatic alignment and attraction by magnetic attraction eliminates the error of manual adjustment and avoids the positioning failure problem caused by bolt stripping or buckle wear. At the same time, the structure of the receiving groove 600 prevents the workpiece from shifting, which is especially suitable for the rapid positioning and high-precision pressing of irregularly shaped workpieces.

[0036] like Figures 1-5 As shown, in another embodiment of this utility model, the controllable magnetic attraction mechanism 500 includes a control unit 510 and an electromagnetic unit 520. The electromagnetic unit 520 is laid on the base plate 100. The control unit 510 is electrically connected to the electromagnetic unit 520. The control unit 510 is used to drive the electromagnetic unit 520 to operate, so that the electromagnetic unit 520 generates a magnetic field that can act magnetically on the magnetic component 700. When the lower mold 200 approaches the base plate 100, the control unit 510 triggers the electromagnetic unit 520 to generate a directional magnetic field based on the sensor signal, which attracts the magnetic component 700 of the lower mold 200 and fixes it. After pressing, the control unit 510 cuts off the current, and the lower mold 200 is automatically released when the magnetic field disappears. Compared with the cumbersome process of traditional mechanical locking that requires manual operation of a wrench or lever, this embodiment achieves convenient attraction and release through electromagnetic switching, significantly reducing mold changing time and operational intensity. Moreover, there is no mechanical contact wear, and the long-term stability is better than that of traditional buckle or bolt structures.

[0037] like Figures 1-5As shown, in another embodiment of this utility model, the electromagnetic unit 520 is an energized coil. The number of electromagnetic units 520 and magnetic components 700 is the same, and there are multiple sets of magnetic components 700. All magnetic components 700 are evenly distributed on the lower mold 200, and all electromagnetic units 520 are disposed on the base plate 100. When the lower mold 200 approaches the base plate 100, the control unit 510 drives the electromagnetic units 520 to operate, so that the magnetic fields generated by all electromagnetic units 520 attract the corresponding magnetic components 700 one by one. When the lower mold 200 approaches, all electromagnetic coils are synchronously energized, accurately attracting the corresponding magnetic components 700, ensuring that the lower mold 200 is horizontally attached to the base plate 100. In this embodiment, the magnetic component 700 is a rare earth magnet. Traditional single-point magnetic attraction is prone to uneven force, which can cause the lower mold to tilt or warp locally. This embodiment uses multi-point synchronous adsorption to evenly distribute the magnetic force, effectively resisting the lateral load during the pressing process and avoiding uneven adhesive layer thickness caused by fixture deformation.

[0038] like Figures 1-5 As shown, in another embodiment of this utility model, the lower mold 200 is arranged in the shape of a cuboid plate, the receiving groove 600 is formed at the center of the lower mold 200, and the number of magnetic components 700 is four sets, which are evenly distributed circumferentially on one side of the corner of the receiving groove 600. After the four corner magnetic components 700 of the square lower mold 200 are aligned with the electromagnetic unit 520 of the base plate 100, the four sets of electromagnetic coils are simultaneously energized and attracted. During pressing, the magnetic attraction resists the torsional torque generated by the pressure of the upper mold 400, keeping the lower mold 200 stable. Compared with the round or irregularly shaped lower mold 200, the square structure is suitable for standardized workpiece size, and the symmetrical adsorption design at the four corners can offset the eccentric load generated by the traditional single-sided pressing mechanism 300, and avoid the misalignment of the bonding interface caused by the deformation of the lower mold 200. It is particularly suitable for the assembly of long strip workpieces such as car door trim panels.

[0039] like Figures 1-5As shown, in another embodiment of this utility model, the base plate 100 is provided with limiting posts 110. There are multiple sets of limiting posts 110, and all the limiting posts 110 are circumferentially spaced along a preset path. The limiting posts 110 form a limiting cavity for initially limiting the lower mold 200. All the electromagnetic units 520 are located below the bottom wall of the limiting cavity. The operator puts the lower mold 200 into the cavity formed by the limiting posts 110. After the limiting posts 110 guide the coarse positioning, the hidden electromagnetic units 520 are energized to attract the lower mold 200 to complete the precise positioning. Traditional fixtures rely on manual visual alignment, which is prone to positioning deviation due to visual errors. This embodiment reduces the difficulty of operation and avoids the exposed electromagnetic units 520 from being contaminated by excess glue through the synergy of physical guidance of the limiting posts 110 and hidden magnetic attraction. The maintenance cost is effectively reduced compared with the traditional open magnetic attraction structure.

[0040] like Figures 1-5 As shown, in another embodiment of this utility model, the pressing mechanism 300 includes a driving component 310, a moving component 320, and a lifting component 330. Both the driving component 310 and the moving component 320 are disposed on the base plate 100. The lifting component 330 is disposed at the output end of the moving component 320. The upper mold 400 is disposed at the output end of the moving component 320. The driving component 310 drives the output end of the lifting component 330 to move towards the base plate 100, enabling the upper mold 400 to press the material to be bonded onto the lower mold 200. Traditional pressing mechanisms 300 use a single-direction linear drive, which is prone to positioning deviation due to inertial impact. This embodiment eliminates the risk of mechanism interference by separating horizontal and vertical movements, resulting in a smoother pressing trajectory, making it particularly suitable for non-destructive assembly of brittle workpieces such as precision electronic components.

[0041] like Figures 1-5 As shown, in another embodiment of this utility model, the moving component 320 includes a guide rail 321 and a first moving seat 322. The guide rail 321 is laid on the base plate 100, and the first moving seat 322 is slidably connected to the guide rail 321. The lifting component 330 is disposed on the first moving seat 322. There are two sets of lower molds 200 and driving components 310. The two sets of lower molds 200 are distributed at intervals at both ends of the guide rail 321, and the driving components 310 are respectively located on one side of the corresponding lower mold 200. Two sets of lower molds 200 are provided at both ends of the guide rail 321. The moving component 320 drives the upper mold 400 to alternately press the workpieces on both sides. The driving component 310 independently controls the dual-station operation, realizing parallel bonding and loading / unloading. Compared with the serial operation mode of the single-station fixture, the dual-station design doubles the equipment utilization rate and reduces the waiting idle time in traditional production. It is particularly suitable for processes that require long curing time, such as battery pack sealant coating.

[0042] like Figures 1-5 As shown, in another embodiment of this utility model, the driving assembly 310 includes a driving motor 311 and a cam 312. The driving motor 311 is fixedly mounted on the base plate and located on one side of the lower mold 200. The cam 312 is tightly connected to the output spindle of the driving motor 311. When the upper mold 400 moves away from the driving motor 311, the protruding end of the cam 312 rotates to above the output spindle of the driving motor 311. The output end of the lifting assembly 330 can drive the upper mold 400 to move to the height range between the cam 312 and the lower mold 200. When the moving assembly 320 drives the upper mold 400 to move to the height range between the cam 312 and the upper mold 200... At this time, the drive motor 311 drives the cam 312 to rotate, so that the protruding end of the cam 312 abuts against and drives the upper mold 400 to move towards the lower mold 200 until the upper mold 400 presses the material to be bonded onto the lower mold 200; the drive motor 311 converts the rotational motion into a non-linear vertical pressing action of the upper mold 400 through the contour of the cam 312, and the curve of the cam 312 matches the pressure gradient requirements of the adhesive leveling stage; traditional cylinder pressing can only provide constant pressure, which is prone to causing poor adhesion due to instantaneous high pressure extrusion of adhesive or insufficient pressure. In this embodiment, the dynamic pressure control of the cam 312 makes the adhesive layer diffusion more uniform, and the bonding strength can be greatly improved compared with the traditional method, which is especially suitable for the precision coating of high viscosity structural adhesives.

[0043] like Figures 1-5 As shown, in another embodiment of this utility model, an angle sensor 120 is provided on the base plate 100. The angle sensor 120 is located on the end of the drive motor 311 away from the lower mold 200. The angle sensor 120 is used to monitor the rotation angle of the output spindle of the drive motor 311. The angle sensor 120 monitors the rotation angle of the output shaft of the drive motor 311 in real time and feeds it back to the control unit 510 to dynamically adjust the pressing stroke. The traditional pressing mechanism 300 relies on manual observation or timed control, which is prone to workpiece damage due to overpressure. This embodiment achieves precise matching of pressure and stroke through angle closed-loop control, avoids equipment overload damage, and ensures the process consistency of each batch of products, significantly reducing the rework rate.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bonding fixture for automotive parts, characterized in that, include: Base plate; The lower mold is detachably connected to the base plate; A pressing mechanism is disposed on the base plate and located on one side of the lower mold; The upper mold is disposed at the output end of the pressing mechanism; The base plate is provided with a controllable magnetic attraction mechanism, the output end of which faces the lower mold. The lower mold is provided with a magnetic component, and the controllable magnetic attraction mechanism can use the magnetic component to firmly attract and fix the lower mold to the base plate.

2. The automotive parts bonding fixture according to claim 1, characterized in that: The lower mold is provided with a receiving groove for accommodating the workpiece to be bonded, the groove opening is arranged facing upwards, and the magnetic component is arranged at the end of the lower mold near the base plate.

3. The automotive parts bonding fixture according to claim 2, characterized in that: The controllable magnetic attraction mechanism includes a control unit and an electromagnetic unit. The electromagnetic unit is laid on the base plate. The control unit is electrically connected to the electromagnetic unit. The control unit is used to drive the electromagnetic unit to operate, so that the electromagnetic unit generates a magnetic field that can act on the magnetic component.

4. The automotive parts bonding fixture according to claim 3, characterized in that: The electromagnetic unit is an energized coil. The number of electromagnetic units and magnetic components is the same. There are multiple sets of magnetic components. All magnetic components are evenly distributed on the lower mold. All electromagnetic units are set on the base plate. When the lower mold approaches the base plate, the control unit drives the electromagnetic units to operate, so that the magnetic fields generated by all electromagnetic units attract the corresponding magnetic components one by one.

5. The automotive parts bonding fixture according to claim 4, characterized in that: The lower mold is a cuboid plate structure, the receiving groove is formed at the center of the lower mold, and there are four sets of magnetic components, which are evenly distributed circumferentially on one side of the corner of the receiving groove.

6. The automotive parts bonding fixture according to claim 4, characterized in that: The base plate is provided with limit posts, and there are multiple sets of limit posts. All the limit posts are circumferentially spaced along a preset path, and the limit posts form a limit cavity for initially limiting the lower mold. All the electromagnetic units are located below the bottom wall of the limit cavity.

7. The automotive parts bonding fixture according to claim 1, characterized in that: The pressing mechanism includes a driving component, a moving component, and a lifting component. The driving component and the moving component are both disposed on the base plate. The lifting component is disposed at the output end of the moving component. The upper mold is disposed at the output end of the moving component. The driving component is used to drive the output end of the lifting component to move towards the base plate, so that the upper mold can press the material to be bonded onto the lower mold.

8. The automotive parts bonding fixture according to claim 7, characterized in that: The moving component includes a guide rail and a first moving seat. The guide rail is laid on the base plate, and the first moving seat is slidably connected to the guide rail. The lifting component is disposed on the first moving seat. There are two sets of lower molds and driving components. The two sets of lower molds are distributed at intervals at both ends of the guide rail, and the driving components are located on one side of the corresponding lower mold.

9. The automotive parts bonding fixture according to claim 7, characterized in that: The driving assembly includes a drive motor and a cam. The drive motor is fixedly mounted on the base plate and located on one side of the lower mold. The cam is tightly connected to the output spindle of the drive motor. When the upper mold moves away from the drive motor, the protruding end of the cam rotates to above the output spindle of the drive motor. The output end of the lifting assembly can drive the upper mold to move to the height range between the cam and the lower mold. When the moving assembly drives the upper mold to move between the cam and the upper mold, the drive motor drives the cam to rotate, so that the protruding end of the cam abuts against and drives the upper mold to move towards the lower mold until the upper mold presses the material to be bonded onto the lower mold.

10. The automotive parts bonding fixture according to claim 9, characterized in that: An angle sensor is provided on the base plate. The angle sensor is located on the end of the drive motor away from the lower mold. The angle sensor is used to monitor the rotation angle of the output spindle of the drive motor.

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