Clamping tool for automobile body welding

Abstract

The utility model discloses a clamping tool for automobile body welding, and belongs to the technical field of automobile welding. A clamping tool for automobile body welding comprises a fixed bottom plate, a movable seat is movably connected to the fixed bottom plate, clamping frames are symmetrically arranged at the two ends of the movable seat, an upper clamping assembly and a lower clamping assembly are arranged on the clamping frames, and the upper clamping assembly and the lower clamping assembly are attached to an automobile body through clamping bags. And the automobile body is clamped and fixed. According to the clamping tool for automobile body welding, the design that the upper clamping assembly and the lower clamping assembly work cooperatively is adopted for the clamping frame, a limiting structure of a sliding strip and a third sliding groove is combined, and guide fit of a guide column and a movable hole is achieved, so that the stability and the clamping precision in the clamping process are effectively improved; the clamping bag is filled with air through a flexible material, has the elastic deformation capacity and can be attached to the surfaces of vehicle bodies with different curvatures, and the clamping attaching degree is improved.

Description

A clamping fixture for automotive body welding Technical Field

[0001] This utility model relates to the field of automotive welding technology, and more specifically, to a clamping fixture for welding automotive bodies. Background Technology

[0002] In the automobile manufacturing process, body welding is a very important step. Current body welding processes often use various fixtures to hold body parts in place, facilitating precise welding operations.

[0003] Chinese patent CN222552626U discloses a welding fixture for an automobile body assembly. This utility model can move the fixture as a whole through a first cylinder and a moving plate. When clamping the car body, the second cylinder will drive the double rack and the upper clamping plate to move downward. At this time, the lower clamping plates on both sides will also move upward, thus cooperating with each other to clamp the car body. However, in this patent, the clamping plate structure is too simple and it is difficult to achieve a stable clamping of the car body. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a clamping fixture for welding automobile bodies to solve the above-mentioned deficiencies.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] This utility model discloses a clamping fixture for welding automobile bodies, including a fixed base plate, a movable seat movably connected to the fixed base plate, clamping frames symmetrically arranged at both ends of the movable seat, and an upper clamping component and a lower clamping component arranged on the clamping frame. Both the upper clamping component and the lower clamping component are attached to the automobile body through clamping pouches to clamp and fix the automobile body.

[0007] Preferably, the upper end of the clamping frame is provided with a movable groove, and a third sliding groove is symmetrically provided on the side wall of the movable groove. A clamping motor is provided on one side of the movable groove through a bracket, and a drive gear is provided at the output end of the clamping motor. The drive gear meshes with both the upper clamping component and the lower clamping component.

[0008] Preferably, the upper clamping assembly and the lower clamping assembly have the same structure. Both the upper clamping assembly and the lower clamping assembly include a rack, a support plate, and a clamping bladder. A slide bar is provided on one side of the rack, and the slide bar is movably connected to a third slide groove to restrict the movement path of the rack. One end of the rack is fixedly connected to the support plate, and the rack drives the support plate to move up and down. One end of the support plate is provided with a clamping bladder. The upper clamping bladders of the upper clamping assembly and the lower clamping assembly are arranged facing each other. The drive gear meshes with the rack, driving the racks on both sides to move towards or in opposite directions. During clamping, the rack drives the support plate to move towards each other, and the clamping bladder contacts the car body and clamps and fixes the car body.

[0009] Preferably, the clamping frame is provided with a guide post, and the support plate is provided with a movable hole that matches the guide post, and the support plate moves up and down along the guide post through the movable hole.

[0010] Preferably, the clamping bladder is filled with air. When clamping, the support plate compresses and deforms the clamping bladder to conform to the curved structure of the car body. The surface of the clamping bladder is covered with a wear-resistant textured silicone layer, which plays a role in preventing slipping and scratching.

[0011] Preferably, an electromagnet array is provided inside the clamping pouch on the side near the clamping surface. When the electromagnet arrays on the upper and lower sides of the vehicle body are energized, they generate local magnetic attraction to assist in fixation and prevent displacement.

[0012] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0013] This utility model discloses a clamping fixture for automotive body welding. The clamping frame adopts a design in which the upper clamping component and the lower clamping component work together. Combined with the limiting structure of the slide bar and the third slide groove, as well as the guiding cooperation of the guide post and the movable hole, it effectively improves the stability and clamping accuracy during the clamping process. The clamping bladder is filled with air using a flexible material and has elastic deformation capability, which can conform to the surface of the car body with different curvatures, improve the clamping fit, reduce stress concentration, and avoid damage to the car body surface. The clamping bladder integrates a micro electromagnet array, which generates magnetic attraction force when in contact with the clamping, further improving the reliability of the clamping. It is especially suitable for working conditions with complex welding postures, preventing the car body from shifting or shaking during the welding process. By setting a two-stage adjustment mechanism of the first lead screw and the second lead screw, the position of the clamping frame in both length and width directions can be adjusted separately. It is suitable for the clamping needs of various specifications and shapes of automotive bodies and has a wide range of applications. Attached Figure Description

[0014] Figure 1 is an overall structural diagram of the clamping fixture for welding automobile bodies according to this utility model;

[0015] Figure 2 is a structural diagram of the clamping frame of this utility model;

[0016] Figure 3 is a structural diagram showing the connection between the upper clamping component and the lower clamping component of this utility model;

[0017] Figure 4 is a cross-sectional view of the upper clamping component of this utility model.

[0018] In the diagram: 1. Fixed base plate; 11. First lead screw; 12. First slide groove; 2. Moving seat; 21. Second lead screw; 22. First slider; 23. Second slide groove; 3. Clamping frame; 31. Second slider; 32. Third slide groove; 33. Clamping motor; 331. Drive gear; 34. Guide post; 4. Upper clamping assembly; 41. Rack; 411. Slide bar; 42. Support plate; 421. Movable hole; 43. Clamping pouch; 431. Electromagnetic array; 5. Lower clamping assembly. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Referring to Figures 1-4, this utility model discloses a clamping fixture for welding automobile bodies, comprising a fixed base plate 1, a movable seat 2 movably connected to the fixed base plate 1, and clamping frames 3 symmetrically arranged at both ends of the movable seat 2, for a total of four clamping frames 3 on the fixed base plate 1. To adjust the distance between the four clamping frames 3, a first lead screw 11 is provided on the fixed base plate 1 to adjust the distance between the movable seats 2, and correspondingly, a second lead screw 21 is provided on the movable seat 2 to adjust the distance between the clamping frames 3. The threads at both ends of the first lead screw 11 and the second lead screw 21 are opposite in direction, and the first lead screw 11 and the second lead screw 21 are respectively driven by motors connected to them. When the first lead screw 11 rotates, the movable seats 2 move towards or in opposite directions to adjust the distance between the clamping frames 3 at both ends of the fixed base plate 1. When the second lead screw 21 rotates, the clamping frames 3 at both ends of the movable seat 2 move towards or in opposite directions to adjust the distance between the clamping frames 3 at both ends of the fixed base plate 1, thereby enabling adjustment of the length and width of the rectangle formed by the clamping frames 3 to adapt to different automobile bodies.

[0022] Specifically, in order to improve the stability of the movable seat 2, a first slide groove 12 is provided on the fixed base plate 1, and a first slider 22 matching the first slide groove 12 is provided at the bottom of the movable seat 2. The center position of the movable seat 2 is engaged with the first lead screw 11. Under the constraint of the first slider 22 and the first slide groove 12, the first lead screw 11 drives the movable seat 2 to move stably.

[0023] It should be noted that the upper surface of the movable seat 2 is provided with a second slide groove 23, and a second lead screw 21 is provided in the second slide groove 23. The lower surface of the clamping frame 3 is provided with a second slider 31 that meshes with the second lead screw 21. The second slider 31 is movably connected to the second slide groove 23 and is used to control the moving position of the clamping frame 3.

[0024] In addition, the upper end of the clamping frame 3 is provided with a movable groove, and the side wall of the movable groove is symmetrically provided with a third sliding groove 32. The upper clamping component 4 and the lower clamping component 5 are movably connected in the third sliding groove 32. A clamping motor 33 is provided on one side of the movable groove through a bracket. A drive gear 331 is provided at the output end of the clamping motor 33. The drive gear 331 meshes with both the upper clamping component 4 and the lower clamping component 5.

[0025] More specifically, the upper clamping assembly 4 and the lower clamping assembly 5 have the same structure. Both include a rack 41, a support plate 42, and a clamping pouch 43. A slide bar 411 is provided on one side of the rack 41. The slide bar 411 is movably connected to the third slide groove 32 to restrict the movement path of the rack 41. One end of the rack 41 is fixedly connected to the support plate 42. The rack 41 drives the support plate 42 to move up and down. One end of the support plate 42 is provided with a clamping pouch 43. The upper clamping assembly 4 and the lower clamping assembly 5 have their upper clamping pouches 43 facing each other. The drive gear 331 meshes with the rack 41, driving the racks 41 on both sides to move towards or away from each other. When clamping, the rack 41 drives the support plate 42 to move towards each other, and the clamping pouch 43 contacts the car body and clamps and fixes the car body.

[0026] To improve the stability of the support plate 42 during movement, a guide post 34 is provided on the clamping frame 3, and an movable hole 421 matching the guide post 34 is provided on the support plate 42. The support plate 42 moves up and down along the guide post 34 through the movable hole 421.

[0027] Meanwhile, in order to improve the firmness of the clamping bladder 43 in clamping the car body, the clamping bladder 43 is filled with air. When clamping, the support plate 42 squeezes the clamping bladder 43 to deform and conform to the curved structure of the car body. The surface of the clamping bladder 43 is covered with a wear-resistant textured silicone layer, which plays a role in preventing slipping and scratching.

[0028] Furthermore, an electromagnet array 431 is provided inside the clamping pouch 43 on the side near the clamping surface. The miniature electromagnets are 10mm in diameter and 20mm apart. When the electromagnet array 431 on the upper and lower sides of the vehicle body is energized, it generates local magnetic attraction force to assist in fixation and prevent displacement.

[0029] Working process: The operator first places the car body to be welded within the space enclosed by the clamping frame 3. Then, the control system starts the motor mounted on the fixed base plate 1, driving the first lead screw 11 to rotate. Since the threads at both ends of the first lead screw 11 are in opposite directions, it drives the two moving seats 2 to move towards each other along the first slide groove 12, thereby adjusting the distance between the two ends of the clamping frame 3 on the fixed base plate 1. Next, the second lead screw 21 on the moving seat 2 is started. Again, because the threads at both ends are in opposite directions, the clamping frame 3 moves inward synchronously under the drive of its corresponding second slider 31. When the position of the clamping frame 3 is adjusted to the correct position, the clamping motor 33 is started. The drive gear 331 at its output end simultaneously meshes with the rack 41 in the upper clamping assembly 4 and the lower clamping assembly 5, causing them to move towards each other. The rack 41 drives the support plate 42 to move towards each other along the guide post 34, and the clamping bag 43 approaches the surface of the car body. When the clamping bag 43 contacts the car body, the support plate 42 continues to push the clamping bag 43, causing it to undergo elastic deformation and closely fit the curved surface structure of the car body. During the clamping process, the electromagnet array 431 inside the clamping bag 43 is energized, generating local magnetic attraction force to help the clamping bag 43 firmly adhere to the metal parts of the car body, preventing displacement caused by vibration or other external forces during the welding process and ensuring welding accuracy. After the welding is completed, the clamping motor 33 reverses, driving the gear 331 to drive the rack 41 to move in the opposite direction, causing the clamping bag 43 to detach from the surface of the car body. Then, the first lead screw 11 and the second lead screw 21 are reset in sequence, releasing the position of the clamping frame 3, which is convenient for changing the next workpiece.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A clamping fixture for welding automobile bodies, comprising a fixed base plate (1), characterized in that, A movable seat (2) is movably connected to the fixed base plate (1). A clamping frame (3) is symmetrically arranged at both ends of the movable seat (2). An upper clamping component (4) and a lower clamping component (5) are arranged on the clamping frame (3). The upper clamping component (4) and the lower clamping component (5) are both attached to the car body through the clamping bag (43) to clamp and fix the car body. A guide post (34) is arranged on the clamping frame (3). An active hole (421) matching the guide post (34) is opened on the support plate (42). The clamping bag (43) is filled with air. The surface of the clamping bag (43) is covered with a wear-resistant textured silicone layer. An electromagnet array (431) is arranged inside the clamping bag (43) on the side close to the clamping surface.

2. The clamping jig for automobile body welding according to claim 1, characterized by The upper end of the clamping frame (3) is provided with a movable groove, and a third sliding groove (32) is symmetrically provided on the side wall of the movable groove. A clamping motor (33) is provided on one side of the movable groove through a bracket. A drive gear (331) is provided at the output end of the clamping motor (33). The drive gear (331) meshes with the upper clamping assembly (4) and the lower clamping assembly (5) at the same time.

3. The clamping tool for welding of automobile bodies according to claim 2, characterized in that, The upper clamping assembly (4) and the lower clamping assembly (5) have the same structure. Both the upper clamping assembly (4) and the lower clamping assembly (5) include a rack (41), a support plate (42) and a clamping pouch (43). A slide bar (411) is provided on one side of the rack (41). The slide bar (411) is movably connected to the third slide groove (32). One end of the rack (41) is fixedly connected to the support plate (42). One end of the support plate (42) is provided with a clamping pouch (43).

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