An arc welding fixture for producing a body part

Abstract

The utility model belongs to tool fixture technical field, especially a kind of arc welding fixture of production car body parts, including base and fixed installation on the base column, the one side fixed mounting of column is the first support block, second support block and third support block of triangular arrangement, for from inside support trapezoidal sleeve workpiece;The other side of column rotatably installs swing frame, first pressing block, second pressing block and third pressing block are installed on the swing frame with the support block corresponding arrangement;Swing frame can rotate to first station, so that the first pressing block and the first support block co-grip workpiece top wall, the second pressing block and the second support block co-grip workpiece side wall, the clamping action of the present application is realized by the mode of rotation, when clamp is in open state, there is enough operating space between pressing block and support block, facilitate the quick installation and disassembly of workpiece.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to an arc welding fixture for producing car body parts. Background Technology

[0002] In the fields of machining and welding, trapezoidal sleeve workpieces often face numerous challenges in clamping and positioning due to their unique cross-sectional shape and structural characteristics. Traditional fixtures mostly employ direct bolt clamping or simple block supports, resulting in problems such as narrow operating space, low workpiece loading and unloading efficiency, and insufficient positioning accuracy. Especially for trapezoidal sleeves requiring simultaneous clamping from multiple sides, uneven distribution of clamping force can easily lead to workpiece deformation or displacement, affecting machining quality and consistency. Therefore, there is an urgent need for a specialized fixture with a reasonable structure, convenient operation, and the ability to achieve rapid clamping and precise positioning to improve clamping efficiency, ensure machining stability, and meet the continuous operation requirements of automated production lines. Utility Model Content

[0003] This utility model provides an arc welding fixture for producing body parts, aiming to solve at least one of the above-mentioned technical problems.

[0004] This utility model provides the following technical solution: An arc welding fixture for producing car body parts includes a base and a column fixedly mounted on the base. A first support block, a second support block, and a third support block arranged in a triangular pattern are fixedly mounted on one side of the column to support a trapezoidal sleeve workpiece from the inside. A swing frame is rotatably mounted on the other side of the column. A first pressure block, a second pressure block, and a third pressure block, corresponding to the support blocks, are mounted on the swing frame. The swing frame can rotate to a first position, such that the first pressure block and the first support block jointly clamp the top wall of the workpiece, the second pressure block and the second support block jointly clamp one side wall of the workpiece, and the third pressure block and the third support block jointly clamp the other side wall of the workpiece.

[0005] Optionally, the second support block and the third support block are arranged opposite to each other, and their support surfaces are inclined surfaces that form an angle with the vertical plane. The spacing between the inclined surfaces gradually increases from top to bottom in the height direction. The second pressure block and the third pressure block cooperate with the inclined surfaces, and their pressing surfaces are also set as matching inclined surfaces.

[0006] Optionally, a first mounting block and a second mounting block are fixed on one side of the column, and the first mounting block and the second mounting block are arranged in a T-shape; the first support block is fixed to the top of the first mounting block, and the second support block and the third support block are respectively fixed to two opposite sides of the second mounting block.

[0007] Optionally, the swing frame includes a rotating shaft connected to the drive assembly, a swing rod is fixedly mounted on the rotating shaft, and three support rods arranged in a triangular pattern are provided at the end of the swing rod away from the rotating shaft. The first pressure block, the second pressure block and the third pressure block are respectively mounted on the three support rods.

[0008] Optionally, the swing arm is connected to the rotating shaft via an ear seat, and the ear seat is inclined to the side away from the support rod.

[0009] Optionally, the drive assembly includes a cylinder and a cylinder chuck, and the rotating shaft is rotatably connected to the cylinder chuck; a connecting rod is also fixed on the rotating shaft, and a strip-shaped hole is formed on the connecting rod; a pin is installed at the output end of the cylinder, and the pin passes through the strip-shaped hole; the cylinder drives the pin to move within the strip-shaped hole, thereby driving the rotating shaft and the swing frame to rotate.

[0010] Optionally, the column is also provided with a positioning pin, which is located on the side of the second support block and the third support block facing away from the swing frame.

[0011] Optionally, a sensor is installed on the side of the column, with the detection end of the sensor facing the clamping position of the workpiece, and a clearance space is provided on the extension line of its detection direction.

[0012] Optionally, a grounding block for grounding the workpiece is installed on the upper side of the first support block.

[0013] Optionally, the three support rods are arranged perpendicularly to each other on the swing arm, wherein the top support rod is used to install the first pressure block, and the two side support rods are used to install the second pressure block and the third pressure block, respectively.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0015] In this invention, a trapezoidal sleeve workpiece is fitted onto the outside of the first, second, and third support blocks. Then, a drive assembly rotates the swing frame, causing the first, second, and third pressure blocks to engage with their respective support blocks, thus clamping the top and side walls of the workpiece. The clamping action is achieved through rotation. When the fixture is in the open state, there is sufficient operating space between the pressure blocks and support blocks, facilitating quick installation and removal of the workpiece.

[0016] In this invention, the synchronous adaptive clamping of the top wall and the two side walls of the workpiece is achieved through the cooperation of the swing frame linkage pressure block and the triangular arrangement support block, which effectively improves the shortcomings of traditional fixtures.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 One of the three-dimensional structural schematic diagrams of an arc welding fixture for producing car body parts provided in this embodiment of the present utility model; Figure 2 This is a schematic diagram of the workpiece provided in an embodiment of the present utility model; Figure 3 This is the second three-dimensional structural schematic diagram of an arc welding fixture for producing car body parts provided in this embodiment of the present utility model; Figure 4 A top view of an arc welding fixture for producing car body parts provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the connecting rod, strip hole, and clamping lug structure of an arc welding fixture for producing body parts, provided as an embodiment of the present utility model.

[0019] Figure label: 1. Workpiece; 2. Positioning hole; 3. Base; 4. Positioning pin; 5. Second support block; 6. Second pressure block; 7. Grounding block; 8. First pressure block; 9. First support block; 10. Support rod; 11. Third support block; 12. Third pressure block; 13. Sensor; 14. Column; 15. Swing rod; 16. Ear seat; 17. Cylinder chuck; 18. Protective cover; 19. Cylinder; 20. Rotating shaft; 21. Connecting rod; 22. Strip hole; 23. Clamping ear. Detailed Implementation

[0020] 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.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] To better understand the purpose, function, and specific design of this utility model, the following detailed description is provided in conjunction with the accompanying drawings.

[0026] Reference Figures 1-5 This application provides an arc welding fixture for producing body parts, including a base 3 and a column 14 fixedly mounted on the base 3. A first support block 9, a second support block 5, and a third support block 11 arranged in a triangular pattern are fixedly mounted on one side of the column 14 to support a trapezoidal sleeve workpiece 1 from the inside. A swing frame is rotatably mounted on the other side of the column 14. A first pressure block 8, a second pressure block 6, and a third pressure block 12 corresponding to the support blocks are mounted on the swing frame. The swing frame can be rotated to a first working position, such that the first pressure block 8 and the first support block 9 jointly clamp the top wall of the workpiece 1, the second pressure block 6 and the second support block 5 jointly clamp one side wall of the workpiece 1, and the third pressure block 12 and the third support block 11 jointly clamp the other side wall of the workpiece 1.

[0027] In practical use, the trapezoidal sleeve workpiece 1 is fitted onto the outside of the first support block 9, the second support block 5, and the third support block 11. Then, the swing frame is rotated via the drive assembly, causing the first pressure block 8, the second pressure block 6, and the third pressure block 12 to engage with their respective first support blocks 9, 5, and 11, thus clamping the top and side walls of workpiece 1. The clamping action is achieved through rotation. When the fixture is in the open state, there is sufficient operating space between the pressure blocks and the support blocks, facilitating the quick installation and removal of workpiece 1.

[0028] In one embodiment of this application, the second support block 5 and the third support block 11 are arranged opposite to each other, and their support surfaces are inclined surfaces that form an angle with the vertical plane. The spacing between the inclined surfaces gradually increases from top to bottom in the height direction. The second pressing block 6 and the third pressing block 12 cooperate with the inclined surfaces, and their pressing surfaces are also set as matching inclined surfaces.

[0029] The inclined surface structure matches the slope of the trapezoidal sleeve's side wall, ensuring a tight fit between the contact surfaces during clamping, thus improving positioning accuracy and clamping stability. When the swing frame rotates to the first position, the second pressure block 6 and the third pressure block 12 slide along the inclined surface onto the two side walls of the workpiece 1, achieving adaptive centering and clamping. Simultaneously, the horizontal support surface of the first support block 9 fits against the top wall of the trapezoidal sleeve, and the drive assembly drives the swing frame to rotate precisely, ensuring a uniform distribution of clamping force, effectively preventing deformation or displacement of the workpiece 1, and improving the reliability and repeatability of the machining process.

[0030] In one embodiment of this application, a first mounting block and a second mounting block are fixed to one side of the column 14, and the first and second mounting blocks are arranged in a T-shape. The first support block 9 is fixed to the top of the first mounting block, and the second support block 5 and the third support block 11 are respectively fixed to two opposite sides of the second mounting block. This T-shaped arrangement enhances the installation rigidity of the support blocks. The first and second mounting blocks are fastened to the column 14 with bolts, which facilitates easy assembly and disassembly and is beneficial for the maintenance and adjustment of the clamps. The support blocks and mounting blocks are connected by pin positioning and bolts, further improving the overall repeatability and connection stability of the structure.

[0031] In one embodiment of this application, the swing frame includes a rotating shaft 20 connected to a drive assembly. A swing rod 15 is fixedly mounted on the rotating shaft 20. Three support rods 10 arranged in a triangular pattern are provided at one end of the swing rod 15 away from the rotating shaft 20. The first pressure block 8, the second pressure block 6, and the third pressure block 12 are respectively mounted on the three support rods 10.

[0032] When the aforementioned rotating shaft 20 rotates, it drives the swing arm 15 to rotate around the rotating shaft 20. When the rotating shaft 20 rotates towards the support block, the swing arm 15 drives the three support rods 10 to move synchronously, causing the first pressure block 8, the second pressure block 6, and the third pressure block 12 to move closer to the first support block 9, the second support block 5, and the third support block 11, respectively, thus achieving multi-point linkage clamping of the workpiece 1. The triangular distribution of the support rods 10 ensures that the pressure blocks are subjected to balanced forces, improving clamping consistency.

[0033] When the rotating shaft 20 rotates away from the support block, the swing arm 15 drives the three support rods 10 to move in the opposite direction, causing the first pressure block 8, the second pressure block 6, and the third pressure block 12 to simultaneously detach from the surface of the workpiece 1. The clamp smoothly retracts to the open state, facilitating the removal or replacement of the workpiece 1. The entire clamping and releasing process is smooth and responsive. Combined with the precise matching of the positioning surface and the inclined surface structure, it effectively ensures stability and reliability in high-frequency clamping operations, meeting the continuous operation requirements of automated production lines.

[0034] Furthermore, by controlling the stroke of the drive component, the rotation angle of the swing frame can be precisely adjusted to ensure that the clamping action between each pressure block and the support block is synchronized and in place; the triangular distribution layout of the support rod 10 corresponds one-to-one with the position of the support block to ensure a balanced distribution of the force points.

[0035] In one embodiment of this application, the swing rod 15 is connected to the rotating shaft 20 via an ear seat 16, and the ear seat 16 is inclined to the side away from the support rod 10.

[0036] The inclined ear seat 16 provides space for the support rod 10 and the pressure block to move, avoids interference, and ensures the smooth operation of the swing frame.

[0037] Furthermore, a limit stop is provided at the top of the column 14 to limit the maximum rotation angle of the swing frame and prevent damage to the clamping mechanism due to overtravel of the drive component; a buffer pad is provided between the limit stop and the lug 16 to absorb the impact energy when the swing frame is in place, thereby improving structural durability. At the same time, the position of the limit stop is adjustable, which facilitates fine adjustment of the clamping angle according to different specifications of workpieces 1, ensuring precise alignment of the pressure block and the support block, and further improving clamping consistency and operational safety.

[0038] In one embodiment of this application, the driving assembly includes a cylinder 19 and a cylinder chuck 17, and the rotating shaft 20 is rotatably connected to the cylinder chuck 17; a connecting rod 21 is also fixed on the rotating shaft 20, and a strip-shaped hole 22 is provided on the connecting rod 21; a pin is installed at the output end of the cylinder 19, and the pin passes through the strip-shaped hole 22; the cylinder 19 drives the pin to move within the strip-shaped hole 22, thereby driving the rotating shaft 20 and the swing frame to rotate.

[0039] The cylinder chuck 17 includes two opposing clamping ears 23 located on the side of the cylinder 19 near the output shaft. The two ends of the rotating shaft 20 extend through the clamping ears 23 and connect to the ear seats 16 on the outer side of the clamping ears 23. The clamping ears 23 are fixedly connected to the main body of the cylinder 19, ensuring stable rotation of the rotating shaft 20 between the clamping ears 23. When the piston of the cylinder 19 extends, the pin slides along the slotted hole 22, pushing the connecting rod 21 to rotate around the rotating shaft 20, causing the rotating shaft 20 and the swing frame to rotate synchronously, thus clamping the workpiece 1 with the pressure block. When the piston retracts, the pin slides in the opposite direction, causing the swing frame to reset, and the pressure block releases the workpiece 1. The advantages of using the cylinder 19 drive are fast response speed, high control precision, and simple maintenance and low cost of the pneumatic system, making it suitable for batch automated production scenarios. By adjusting the air pressure and the throttle valve opening, the matching of clamping force and action speed can be further optimized to adapt to the clamping requirements of workpieces 1 with different materials and structures, ensuring stable and reliable system operation. Meanwhile, the length of the strip hole 22 is designed to match the movement trajectory of the pin shaft, ensuring that the cylinder 19 can achieve the full-angle movement of the swing frame within a limited stroke, thereby improving transmission efficiency.

[0040] Furthermore, the cylinder 19 is installed on the side of the column 14 away from the support block, and the cylinder 19 body is fixedly connected to the column 14 by bolts.

[0041] Furthermore, a protective cover is fixed to the outside of cylinder 19; 18.

[0042] Specifically, in this embodiment, the cylinder 19 is connected to the air source system via a pipeline. The air source system is used to provide stable air pressure to the cylinder 19 to ensure reliable execution of the clamping action. The cylinder 19 is connected to the control system, which can realize automated control of the clamping and releasing actions.

[0043] The control system is integrated into the main electrical control box of the equipment. It achieves precise control of the action timing through PLC programming and is linked with other processes on the production line to ensure that the clamping operation is synchronized with the processing flow.

[0044] In one embodiment of this application, a positioning pin 4 is also provided on the column 14, and the positioning pin 4 is located on the side of the second support block 5 and the third support block 11 facing away from the swing frame.

[0045] A positioning hole 2 is provided on the lower side wall of workpiece 1, and a positioning pin 4 is inserted into the positioning hole 2.

[0046] The positioning pin 4 is used to limit the displacement of workpiece 1 along the length of the support block during clamping, prevent workpiece 1 from moving during clamping, and ensure that workpiece 1 is positioned accurately and stably.

[0047] In one embodiment of this application, a sensor 13 is installed on the side of the column 14, the detection end of the sensor 13 faces the clamping position of the workpiece 1, and an avoidance space is provided on the extension line of its detection direction.

[0048] The clearance space is used so that when no workpiece 1 is placed, the sensor 13 can detect the empty space normally and avoid accidentally triggering the clamping action; when the workpiece 1 is in place, the sensor 13 sends a signal back to the control system to confirm that the clamping conditions are met before the clamping command can be executed, thereby realizing interlocking safety control.

[0049] Specifically, in this embodiment, the sensor 13 can be a proximity switch or a photoelectric sensor, mounted on the connecting block on the side of the column 14 and fastened with screws. Its position is adjustable to adapt to the detection requirements of different workpieces 1. The sensor 13 is electrically connected to the control system, monitoring the status of the workpiece 1 in real time to ensure that the clamping action is triggered only when the workpiece 1 is correctly positioned, effectively preventing damage from empty clamping or overload. When the sensor 13 does not detect the workpiece 1, the system locks the drive signal of the cylinder 19, maintaining the released state; when the workpiece 1 enters the clamping area and is confirmed by the sensor 13, the control signal is released, allowing the cylinder 19 to execute the clamping process, achieving a safety interlock.

[0050] The control system integrates a PLC or dedicated controller, receives signals from sensor 13 and outputs drive commands, and features delay control, fault alarm, and status memory functions to ensure that clamping actions are synchronized with the production line cycle. With a human-machine interface, parameters can be adjusted in real time, improving adaptability and ease of operation.

[0051] In one embodiment of this application, a grounding block 7 for grounding the workpiece 1 is installed on the upper side of the first support block 9.

[0052] The grounding block 7 is connected to the equipment grounding system through a wire to ensure that the workpiece 1 is reliably grounded during the welding process, effectively conducts the welding current, and avoids burns on the surface of the workpiece 1 or unstable welding quality due to current accumulation.

[0053] In one embodiment of this application, the three support rods 10 are arranged perpendicularly to each other on the swing rod 15, wherein the top support rod 10 is used to install the first pressure block 8, and the support rods 10 on both sides are used to install the second pressure block 6 and the third pressure block 12, respectively.

[0054] The three clamping blocks apply clamping force to the workpiece 1 from the top and sides respectively, forming a multi-point coordinated constraint, which effectively prevents the workpiece 1 from deforming or displacing due to uneven force during the welding process.

[0055] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An arc welding fixture for producing body parts, comprising a base and a column fixedly mounted on the base, characterized in that: One side of the column is fixedly equipped with a first support block, a second support block, and a third support block arranged in a triangle to support the trapezoidal sleeve workpiece from the inside. A swing frame is rotatably installed on the other side of the column. The swing frame is equipped with a first pressure block, a second pressure block, and a third pressure block that are corresponding to the support blocks. The swing frame can be rotated to a first working position, such that the first pressure block and the first support block jointly clamp the top wall of the workpiece, the second pressure block and the second support block jointly clamp one side wall of the workpiece, and the third pressure block and the third support block jointly clamp the other side wall of the workpiece.

2. The arc welding fixture for producing car body parts according to claim 1, characterized in that: The second support block and the third support block are arranged opposite to each other, and their support surfaces are inclined surfaces that form an angle with the vertical plane. The spacing between the inclined surfaces gradually increases from top to bottom in the height direction. The second pressure block and the third pressure block cooperate with the inclined surfaces, and their pressing surfaces are also set as matching inclined surfaces.

3. An arc welding fixture for producing car body parts according to claim 1 or 2, characterized in that: A first mounting block and a second mounting block are fixed on one side of the column, and the first mounting block and the second mounting block are arranged in a T-shape; the first support block is fixed to the top of the first mounting block, and the second support block and the third support block are respectively fixed to two opposite sides of the second mounting block.

4. The arc welding fixture for producing car body parts according to claim 1, characterized in that: The swing frame includes a rotating shaft connected to the drive assembly, a swing rod is fixedly mounted on the rotating shaft, and three support rods arranged in a triangular pattern are provided at the end of the swing rod away from the rotating shaft. The first pressure block, the second pressure block and the third pressure block are respectively mounted on the three support rods.

5. The arc welding fixture for producing car body parts according to claim 4, characterized in that: The swing arm is connected to the rotating shaft via an ear seat, which is inclined to the side away from the support rod.

6. The arc welding fixture for producing car body parts according to claim 4, characterized in that: The drive assembly includes a cylinder and a cylinder chuck, and the rotating shaft is rotatably connected to the cylinder chuck; a connecting rod is also fixed on the rotating shaft, and a strip-shaped hole is opened on the connecting rod; a pin is installed at the output end of the cylinder, and the pin passes through the strip-shaped hole; the cylinder drives the pin to move in the strip-shaped hole, thereby driving the rotating shaft and the swing frame to rotate.

7. The arc welding fixture for producing car body parts according to claim 6, characterized in that: The column is also equipped with a positioning pin, which is located on the side of the second and third support blocks facing away from the swing frame.

8. The arc welding fixture for producing car body parts according to claim 7, characterized in that: A sensor is installed on the side of the column, with the detection end of the sensor facing the clamping position of the workpiece, and a clearance space is provided on the extension line of its detection direction.

9. The arc welding fixture for producing car body parts according to claim 1, characterized in that: A grounding block for workpiece grounding is installed on the upper side of the first support block.

10. The arc welding fixture for producing car body parts according to claim 5, characterized in that: The three support rods are arranged perpendicularly to each other on the swing arm, wherein the top support rod is used to install the first pressure block, and the two side support rods are used to install the second pressure block and the third pressure block, respectively.

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