A grinding device for automobile frame production

Abstract

This utility model relates to the field of grinding device technology and discloses a grinding device for automobile frame production. It fixes the position of the crossbeam by setting a worktable, guide rail, vacuum tank, suction cup, and adapting fixture, preventing positional shift during grinding. The adapting fixture slides to the outer ring of the guide rail according to the length of the crossbeam. When the adapting fixture reaches the designated position, a servo electric cylinder is activated. The servo electric cylinder drives the ejector pins upward through the output shaft, so that the ends of the ejector pins fit against the lower surface of the crossbeam, supporting the arc curvature of the crossbeam. After all ejector pins are in place, an external vacuum generator is activated, absorbing air from inside the vacuum tank through a solenoid valve. This allows the vacuum tank to adhere to the bottom plane of the crossbeam through the suction cup, firmly adhering the crossbeam to the suction cup surface. Both sides of the arc surface are supported by the ejector pins. At this point, the position is fixed, effectively fixing the crossbeam's position.

Description

Technical Field

[0001] This utility model relates to the field of grinding device technology, and in particular to a grinding device for automobile frame production. Background Technology

[0002] The chassis is a frame structure spanning the front and rear axles of a car, commonly known as a beam, and is the base of the vehicle. It generally consists of two longitudinal beams and several crossbeams, supported on the wheels via the suspension system, front axle, and rear axle. The chassis must have sufficient strength and rigidity to withstand the loads of the car and the impacts transmitted from the wheels. The longitudinal and crossbeams require grinding equipment during the manufacturing process.

[0003] In the existing technology, there are some shortcomings in fixing the position of the crossbeam before grinding. For example, because the crossbeam is irregular in shape, traditional rigid clamps can easily cause local suspension. During grinding, the crossbeam is affected by vibration and displacement occurs, causing the grinding head to be misaligned with the target area. In addition, different models of crossbeams require different grinding heads, and traditional grinding heads need to be manually adjusted and the clamps changed, which takes a long time. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a grinding device for automobile frame production, which has the advantages of adaptive tooling, vacuum adsorption, and quick grinding head replacement, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a grinding device for automobile frame production, including a worktable, the surface of which is symmetrically provided with sliding grooves, the bottom of which is symmetrically fixedly mounted with side plates, the middle of the adjacent surfaces of the side plates is provided with guide rails, the outer ring of which is slidably mounted with adapting tooling, a support platform is provided on one side of the worktable, a robotic arm is fixedly mounted on the top of the support platform, an electric cylinder and a motor A are fixedly mounted on the end of the robotic arm, the output shaft of the motor A is connected to a grinding disc through a coupling, the outer ring of which is provided with a ball groove, and a quick-change mechanism is installed inside the support platform on one side of the robotic arm.

[0006] Through the above structural setup, the vacuum adsorption of the beam position is achieved by the cooperation of the vacuum tank, solenoid valve, and suction cup. The quick-change mechanism enables rapid head replacement.

[0007] Preferably, a groove is formed in the center of the surface of the workbench, and a vacuum groove is formed in the interior of the workbench at the corresponding position of the groove. An electromagnetic valve is provided at the bottom of the workbench, and the electromagnetic valve is connected to the interior of the vacuum groove. Suction cups are uniformly arranged in a linear array on the surface of the groove, and the suction cups are connected to the interior of the vacuum groove. The top of the suction cups is flush with the surface of the workbench.

[0008] With the above structural setup, the vacuum tank uses negative pressure to press the bottom plane of the crossbeam tightly against the surface of the suction cup, eliminating the gap between the crossbeam and the suction cup and preventing displacement due to vibration during grinding. At the same time, it works with the adapting fixture to fix the position of the crossbeam. The adapting fixture supports the curved parts on both sides of the crossbeam, achieving point-to-point support.

[0009] Preferably, the adapting fixture is provided in two sets, each set of the adapting fixture includes four servo electric cylinders and two slot blocks. The output shaft of the servo electric cylinder is fixedly connected to a pin, the end of the pin is a polyurethane contour block, and a slot block is fixedly installed between one side of each pair of servo electric cylinders. The slot block is slidably installed on the outer ring of the guide rail.

[0010] With the above structural setup, first adjust the position of the servo electric cylinder via the slot block on the outer ring of the guide rail, then start the servo electric cylinder, and extend the ejector pin upward through its output shaft until the end of the ejector pin is in contact with the arc-shaped lower surface of the crossbeam. After all the ejector pins are in place, start the vacuum adsorption and stop moving, and enter the position fixing stage.

[0011] Preferably, a sliding sleeve is fixedly connected to the end of the output shaft of the electric cylinder, and a groove is formed on the surface of the sliding sleeve.

[0012] With the above-mentioned structure, the electric cylinder controls the position of the sliding sleeve on the outer ring of the drive sleeve to fix or release the grinding disc. When the grinding disc is inserted into the drive sleeve, the electric cylinder drives the sliding sleeve to retract, so that the inner wall of the slot squeezes the steel ball and the steel ball is inserted into the ball groove through the ball hole.

[0013] Preferably, the output shaft of the motor A is connected to a drive sleeve via a coupling. The drive sleeve has evenly spaced circular ball holes inside. A steel ball is slidably installed inside the ball hole. The shape and size of the steel ball are adapted to the inner wall of the slot, and the shape and size of the steel ball and the ball slot are adapted to each other.

[0014] With the above structural setup, the electric cylinder drives the sliding sleeve to move downward through the output shaft, so that the slot slides on the outer ring of the drive sleeve. When the slot slides downward, the steel ball has space to move towards the inner wall of the slot. Due to the gravity of the grinding disc, the steel ball falls and moves through the ball hole towards the inner wall of the slot, thereby unlocking the grinding disc.

[0015] Preferably, the quick-change mechanism includes a motor B and a rotating storage rack. The motor B is fixedly installed inside the support platform, and the output shaft of the motor B is connected to the rotating storage rack via a coupling. A replacement head is slidably installed inside the rotating storage rack.

[0016] With the above structural setup, motor B drives the rotating storage rack to rotate via the output shaft and coupling, so that the replacement head that is just being replaced is located below the drive sleeve. Through the cooperation between the quick-change mechanism and motor A, the effect of quickly replacing the replacement head is achieved.

[0017] This utility model has the following advantages:

[0018] 1. This grinding device for automobile frame production uses a worktable, guide rail, vacuum tank, suction cup, and adapting fixture to fix the position of the crossbeam, preventing positional shift during grinding. The adapting fixture slides to the outer ring of the guide rail according to the length of the crossbeam. When the adapting fixture reaches the designated position, the servo electric cylinder is activated. The servo electric cylinder drives the ejector pins to extend upward through the output shaft, so that the ends of the ejector pins fit against the lower surface of the crossbeam, supporting the arc curvature of the crossbeam. After all ejector pins are in place, the external vacuum generator is activated, and air is drawn from the vacuum tank through the solenoid valve. The vacuum tank then uses the suction cup to adhere to the bottom plane of the crossbeam, firmly adhering the crossbeam to the surface of the suction cup. Both sides of the arc surface are supported by the ejector pins. At this point, the position is fixed, effectively fixing the crossbeam's position.

[0019] 2. This grinding device for automotive frame production achieves rapid grinding head replacement by incorporating an electric cylinder, motor A, steel balls, a quick-change mechanism, and a replacement head. The electric cylinder and motor A are moved above the rotating storage rack, aligning the grinding disc with the rack's pick-up / placement position. The electric cylinder then drives the sliding sleeve to extend outwards, causing the slot to slide downwards on the outer ring of the drive sleeve. As the slot slides, space is created between the slot and the drive sleeve for the steel balls to move. The sidewalls of the steel balls are no longer tightly pressed by the slot. Simultaneously, due to the weight of the grinding disc, the steel balls are driven through the ball groove, passing through the ball hole and moving towards the inner wall of the slot. This releases the clamping limit of motor A on the grinding disc. Motor B is then activated, driving the rotating storage rack to rotate via its output shaft and coupling. The replacement head is rotated to a position below the drive sleeve. The robotic arm then lowers the electric cylinder and motor A, inserting the replacement head into the drive sleeve. The disassembly and assembly process is then reversed, fixing the replacement head inside the drive sleeve, thus achieving rapid grinding head replacement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the workbench of this utility model;

[0022] Figure 3 This is a schematic diagram of the support platform structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the drive sleeve of this utility model.

[0024] In the diagram: 1. Workbench; 11. Slide rail; 12. Side plate; 13. Guide rail; 14. Vacuum tank; 15. Solenoid valve; 16. Suction cup; 2. Adaptive tooling; 21. Servo electric cylinder; 22. Ejector pin; 23. Slot block; 3. Support platform; 4. Robotic arm; 5. Electric cylinder; 51. Sliding sleeve; 52. Slot; 6. Motor A; 61. Drive sleeve; 62. Ball hole; 63. Steel ball; 7. Grinding disc; 71. Ball groove; 8. Quick change mechanism; 81. Motor B; 82. Rotary storage rack; 83. Replacement head. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-2 A grinding device for automobile frame production includes a worktable 1. The surface of the worktable 1 has symmetrically formed grooves 11. Side plates 12 are symmetrically fixed to the bottom of the worktable 1. Guide rails 13 are provided in the middle of adjacent surfaces of the side plates 12. A groove is formed in the middle of the surface of the worktable 1. A vacuum groove 14 is formed inside the worktable 1 at a corresponding position in the groove. A solenoid valve 15 is provided at the bottom of the worktable 1, communicating with the inside of the vacuum groove 14. The solenoid valve 15 is connected to an external vacuum generator. The surface of the groove is arranged in a linear array. A suction cup 16 is evenly provided, and the suction cup 16 is connected to the inside of the vacuum tank 14. The top of the suction cup 16 is flush with the surface of the worktable 1. A suitable tooling 2 is slidably installed on the outer ring of the guide rail 13. A support platform 3 is provided on one side of the worktable 1. A robotic arm 4 is fixedly installed on the top of the support platform 3. An electric cylinder 5 and a motor A6 are fixedly installed at the end of the robotic arm 4. The output shaft of the motor A6 is connected to a grinding disc 7 through a coupling. A ball groove 71 is opened on the outer ring of the grinding disc 7. A quick-change mechanism 8 is installed inside the support platform 3 on one side of the robotic arm 4.

[0027] In practical applications, this device achieves the effect of vacuum adsorption of the crossbeam by setting up a vacuum tank 14, a solenoid valve 15, and a suction cup 16 in cooperation. The vacuum tank 14 uses negative pressure to press the bottom plane of the crossbeam tightly against the surface of the suction cup 16, eliminating the gap between the crossbeam and the suction cup 16 and preventing displacement due to vibration during grinding. At the same time, it cooperates with the adapting fixture 2 to fix the position of the crossbeam. The adapting fixture 2 supports the curved parts on both sides of the crossbeam to achieve point-to-point support. Then, the suction cup 16 vacuum adsorbs the bottom plane of the crossbeam, adsorbing the crossbeam onto the fixture, further enhancing the fixing effect and preventing displacement during grinding.

[0028] By setting up the cooperation between the electric cylinder 5, the motor A6 and the quick-change mechanism 8, the effect of quickly changing the grinding head is achieved. When the grinding head needs to be changed, the position of the electric cylinder 5 and the motor A6 is moved above the quick-change mechanism 8 by the operation of the robotic arm 4. The grinding head connected to the output shaft end of the electric cylinder 5 is aligned with the rotating storage rack 82, the existing grinding head is disassembled, and then the new grinding head is inserted into the sliding sleeve 51. The drive sleeve 61 drives the steel ball 63 to be inserted into the ball groove 71, thereby fixing the new grinding head and achieving the effect of quickly changing the grinding head.

[0029] Please see Figures 1-2 The adapting fixture 2 is provided in two sets. Each set of adapting fixture 2 includes four servo electric cylinders 21 and two slot blocks 23. The output shaft of the servo electric cylinder 21 is fixedly connected to the ejector pin 22. The end of the ejector pin 22 is a polyurethane contour block that matches the curvature of the lower surface of the crossbeam. Slot blocks 23 are fixedly installed between one side of each pair of servo electric cylinders 21. The slot blocks 23 are slidably installed on the outer ring of the guide rail 13. The slot blocks 23 and the guide rail 13 form a linear guide rail.

[0030] By adapting the tooling 2, the support points can be automatically adjusted according to the three-dimensional shape of the crossbeam to ensure that the crossbeam does not wobble during grinding, providing a reference for subsequent grinding. The crossbeam is hoisted above the worktable 1. First, the servo electric cylinder 21 is adjusted to be located on the outer ring of the guide rail 13 through the slot block 23. Then, the servo electric cylinder 21 is started, and the ejector pin 22 is extended upward through its output shaft until the end of the ejector pin 22 is in contact with the arc-shaped lower surface of the crossbeam. After all the ejector pins 22 are in place, the vacuum adsorption step is started, and the position fixing stage is entered.

[0031] Please see Figures 1-4 The output shaft end of the electric cylinder 5 is fixedly connected to a sliding sleeve 51, and a groove 52 is provided on the surface of the sliding sleeve 51.

[0032] The electric cylinder 5, through the cooperation of the sliding sleeve 51, the slot 52, and the motor A6, achieves the effect of mechanically locking the grinding disc 7 in the position inside the drive sleeve 61. When installing or replacing the grinding disc 7, the electric cylinder 5 controls the position of the sliding sleeve 51 on the outer ring of the drive sleeve 61 to fix or release the grinding disc 7. When the grinding disc 7 is inserted into the drive sleeve 61, the electric cylinder 5 drives the sliding sleeve 51 to retract, so that the inner wall of the slot 52 squeezes the position of the steel ball 63, so that the steel ball 63 is inserted into the ball groove 71 through the ball hole 62, thereby fixing the position of the grinding disc 7. Conversely, the grinding disc 7 can be disassembled.

[0033] Please see Figures 1-4The output shaft of motor A6 is connected to drive sleeve 61 via coupling. Drive sleeve 61 has evenly spaced ball holes 62 in a circular shape inside. Steel balls 63 are slidably installed inside ball holes 62. The shape and size of steel balls 63 are adapted to the inner wall of slot 52. The shape and size of steel balls 63 are also adapted to ball groove 71.

[0034] Motor A6 and electric cylinder 5 work together to quickly change the grinding disc 7. When a different model of grinding disc 7 needs to be changed, the robotic arm 4 moves the electric cylinder 5 and motor A6 to the top of the quick-change mechanism 8. Then, the electric cylinder 5 drives the sliding sleeve 51 to move downward through the output shaft, so that the slot 52 slides on the outer ring of the drive sleeve 61. When the slot 52 slides downward, the steel ball 63 has space to move towards the inner wall of the slot 52. Due to the gravity of the grinding disc 7, the steel ball 63 moves through the ball hole 62 towards the inner wall of the slot 52, thereby unlocking the grinding disc 7. After inserting the new grinding disc 7 into the drive sleeve 61, the reverse operation is performed to mechanically lock the grinding disc 7.

[0035] Please see Figures 1-4 The quick-change mechanism 8 includes a motor B81 and a rotating storage rack 82. The motor B81 is fixedly installed inside the support platform 3. The output shaft of the motor B81 is connected to the rotating storage rack 82 via a coupling. A replacement head 83 is slidably installed inside the rotating storage rack 82. The outer ring of the replacement head 83 is the same as the outer ring of the grinding disc 7, and both are provided with ball grooves 71.

[0036] In actual use, motor B81 drives the rotating storage rack 82 to rotate through the output shaft and coupling, so that the replacement head 83 that is just replaced is located below the drive sleeve 61, and the drive sleeve 61 is matched with the ball groove 71. Through the cooperation between the quick-change mechanism 8 and motor A6, the effect of quickly replacing the replacement head 83 is achieved.

[0037] Working principle: In use, the crossbeam is first hoisted onto the surface of the workbench 1 so that the bottom plane of the crossbeam is above the suction cup 16. Then, the adapting fixture 2 is slidably positioned on the outer ring of the guide rail 13 according to the length of the crossbeam. When the adapting fixture 2 reaches the designated position, the servo electric cylinder 21 is activated. The servo electric cylinder 21 drives the ejector pin 22 to extend upward through the output shaft, so that the end of the ejector pin 22 is in contact with the lower surface of the crossbeam to support the arc curvature of the crossbeam. After all the ejector pins 22 are in place, the external vacuum generator is activated, and the air inside the vacuum tank 14 is absorbed through the solenoid valve 15, so that the vacuum tank 14 is adsorbed by the suction cup 16 to the bottom plane of the crossbeam, so that the crossbeam is firmly adsorbed on the surface of the suction cup 16, and both sides of the arc surface are supported by the ejector pins 22. At this time, the measurement position is fixed. Then, the robotic arm 4 and the motor A6 are activated to make the grinding disc 7 grind the surface of the crossbeam.

[0038] During grinding, different types of grinding discs 7 are required for different positions, necessitating the replacement head 83 for subsequent work. First, the robotic arm 4 moves the electric cylinder 5 and motor A6 above the rotating storage rack 82, aligning the grinding disc 7 with the pick-and-place position on the rack 82. At this point, the electric cylinder 5 drives the sliding sleeve 51 to extend outwards, causing the slot 52 to slide downwards on the outer ring of the drive sleeve 61. As the slot 52 slides, it creates space for the steel ball 63 to move between itself and the drive sleeve 61. The sidewalls of the steel ball 63 are no longer tightly pressed by the slot 52. Simultaneously, due to the gravity of the grinding disc 7, it falls downwards, driven by the ball groove 71. The ball 63 moves through the ball hole 62 toward the inner wall of the slot 52, releasing the clamping limit of the motor A6 on the grinding disc 7, so that the grinding disc 7 falls into the pick-and-place position on the surface of the rotating storage rack 82. Then the motor B81 is started. The motor B81 drives the rotating storage rack 82 to rotate through the output shaft and coupling, rotating the position of the replacement head 83 to be replaced to below the drive sleeve 61. At this time, the robotic arm 4 drives the electric cylinder 5 and the motor A6 to descend, so that the replacement head 83 is inserted into the drive sleeve 61. Then the disassembly and assembly process is reversed, so that the position of the replacement head 83 is fixed inside the drive sleeve 61, so that the crossbeam can be re-grinded.

Claims

1. A polishing device for automobile frame production, comprising a workbench (1), characterized in that: The surface of the workbench (1) is symmetrically provided with sliding grooves (11). The bottom of the workbench (1) is symmetrically fixedly provided with side plates (12). The middle of the adjacent surfaces of the side plates (12) is provided with guide rails (13). The outer ring of the guide rails (13) is slidably provided with adapting fixtures (2). The workbench (1) is provided with a support platform (3) on one side. The top of the support platform (3) is fixedly provided with a robotic arm (4). The end of the robotic arm (4) is fixedly provided with an electric cylinder (5) and a motor A (6). The output shaft of the motor A (6) is connected to a grinding disc (7) through a coupling. The outer ring of the grinding disc (7) is provided with a ball groove (71). The inside of the support platform (3) is located on one side of the robotic arm (4) and a quick-change mechanism (8) is installed.

2. The polishing device for automobile frame production according to claim 1, characterized in that: The workbench (1) has a groove in the middle of its surface. A vacuum groove (14) is provided in the interior of the workbench (1) at the corresponding position of the groove. A solenoid valve (15) is provided at the bottom of the workbench (1). The solenoid valve (15) is connected to the interior of the vacuum groove (14). A suction cup (16) is uniformly arranged in a linear array on the surface of the groove. The suction cup (16) is connected to the interior of the vacuum groove (14). The top of the suction cup (16) is flush with the surface of the workbench (1).

3. The polishing device for automobile frame production according to claim 2, characterized in that: The adapting fixture (2) is provided in two sets. Each set of the adapting fixture (2) includes four servo electric cylinders (21) and two slot blocks (23). The output shaft of the servo electric cylinder (21) is fixedly connected to a push pin (22). The end of the push pin (22) is a polyurethane contour block. A slot block (23) is fixedly installed between one side of each pair of servo electric cylinders (21). The slot block (23) is slidably installed on the outer ring of the guide rail (13).

4. The polishing device for automobile frame production according to claim 3, characterized in that: The output shaft end of the electric cylinder (5) is fixedly connected to a sliding sleeve (51), and a groove (52) is provided on the surface of the sliding sleeve (51).

5. The polishing device for automobile frame production according to claim 4, characterized in that: The output shaft of the motor A (6) is connected to a drive sleeve (61) via a coupling. The drive sleeve (61) has a circular hole (62) evenly distributed inside. A steel ball (63) is slidably installed inside the hole (62). The shape and size of the steel ball (63) are adapted to the inner wall of the slot (52). The shape and size of the steel ball (63) are adapted to the ball groove (71).

6. The polishing device for automobile frame production according to claim 5, characterized in that: The quick-change mechanism (8) includes a motor B (81) and a rotating storage rack (82). The motor B (81) is fixedly installed inside the support platform (3). The output shaft of the motor B (81) is connected to the rotating storage rack (82) via a coupling. A replacement head (83) is slidably installed inside the rotating storage rack (82).

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