A device for correcting the surface flatness of automotive sheet metal

Abstract

This utility model relates to the field of automotive sheet metal processing technology, and in particular to an automotive sheet metal surface flatness correction device. It includes a support base with two end supports symmetrically fixedly connected to it. Each end support is fixedly connected to a mounting base. A servo motor is mounted on the top of the mounting base, and the output end of the servo motor passes through the mounting base and is connected to a ball screw via a coupling. When the servo motor operates, it drives the ball screw to rotate. As the ball screw rotates, it moves a sliding block, a connecting rod, and a roller support through the thread action. When the roller support moves, it moves the upper correction roller, thereby adjusting the distance between the upper and lower correction rollers to accommodate automotive sheet metal of different thicknesses. This solves the problem of traditional devices having fixed roller spacing or simple manual adjustment, making it difficult to adapt to different sheet metal mechanical properties. It effectively avoids over-correction and under-correction, and adapts to diverse sheet metal correction needs.

Description

Technical Field

[0001] This utility model relates to the field of automotive sheet metal processing technology, and in particular to an automotive sheet metal surface flatness correction device. Background Technology

[0002] In the automotive manufacturing industry, the flatness of automotive sheet metal surfaces has a significant impact on the overall quality, performance, and appearance of a vehicle. When the flatness of body panels, structural components, and other sheet metal is substandard, it can reduce the precision of vehicle assembly, increase wind resistance, affect paint quality, and may also cause problems such as abnormal noises and vibrations during driving. Therefore, efficient and precise surface flatness correction devices are needed.

[0003] In existing traditional devices for correcting the surface flatness of automotive sheet metal, the roller spacing is mostly fixed or can only be adjusted manually. This makes it difficult to precisely adjust the roller system parameters according to the mechanical properties of automotive sheet metal of different thicknesses and materials, easily leading to overcorrection or undercorrection. This results in poor correction effects and low efficiency, as the devices cannot adapt to the diverse sheet metal correction needs. Furthermore, when conventional rigid rollers apply force, the stress is mainly concentrated locally. For complex curved automotive sheet metal, this can easily cause residual internal stress and surface scratches. Moreover, the device cannot dynamically adjust the force characteristics according to the real-time condition of the sheet metal, making the roller action lack flexibility and adaptability, thus failing to meet the correction requirements of high-quality automotive sheet metal. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a device for correcting the surface flatness of automotive sheet metal.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A device for correcting the flatness of automotive sheet metal surfaces includes a support base, on which two end supports are symmetrically fixedly connected. Each of the two end supports is fixedly connected to a mounting base. A servo motor is provided on the top of the mounting base, and the output end of the servo motor passes through the mounting base and is connected to a ball screw via a coupling. The outer surface of the ball screw is connected to a sliding block by a thread. A connecting rod is fixedly connected to the bottom of the sliding block. The top of the connecting rod has a shaft hole through which the ball screw can pass. The bottom of the connecting rod is fixedly connected to a roller support. The outer wall of the roller support has a placement hole. An upper straightening roller is arranged between the two placement holes. The outer surface of the upper straightening roller has a groove. A pressure sensor is arranged in the groove.

[0006] Preferably, the end support has two mounting roller holes, and a lower straightening roller is provided in each of the two mounting roller holes. The lower straightening roller has a hollow structure inside, forming a sealed cavity. The lower straightening roller is provided with an air pipe interface at its end, and a connecting air pipe is sleeved on the end of the air pipe interface. A support base is fixedly connected to one side of the support base, and an air storage tank is provided on the support base. An air pump is provided at the output end of the air storage tank. The air pump is connected to the connecting air pipe through an inflation pipe. A solenoid valve is provided at the end of the inflation pipe near the air storage tank.

[0007] Preferably, the outer surfaces of both lower straightening rollers are covered with elastic skin, a sealing rubber ring is provided between the elastic skin and the lower straightening roller, a pressure sensor is provided in the sealing cavity of the lower straightening roller, and an air tube plug is sleeved on the end of the air pipe interface.

[0008] Preferably, a support plate is fixedly connected to the outer wall of the support base, an electric motor is provided on the support plate, a gearbox is connected to the output end of the electric motor, a first gear is connected to the output end of the gearbox, a second gear is meshed with the outer side of the first gear, a third gear is meshed with the outer side of the second gear, the middle part of the third gear is movably connected to the outer wall of the end support through a support rod, a fourth gear is meshed with the outer side of the third gear, and the middle parts of the second gear and the fourth gear are both fixedly connected to the lower straightening roller.

[0009] Preferably, linear guide rails are fixedly connected to both sides of the inner wall of the mounting base, and a movable block that cooperates with the linear guide rails is fixedly connected to the outer wall of the sliding block.

[0010] Preferably, a fixed support is fixedly connected to the outer wall of the support base, and an operation panel is provided on the top of the fixed support. A PLC controller is provided inside the operation panel, and the servo motor, pressure sensor one, air tank, solenoid valve, pressure sensor two, and motor are all electrically connected to the PLC controller.

[0011] The beneficial effects of this utility model are: This automotive sheet metal surface flatness straightening device uses a servo motor to drive a ball screw to rotate. As the ball screw rotates, it moves the sliding block, connecting rod, and roller support through the thread action. When the roller support moves, it moves the upper straightening roller, thereby adjusting the distance between the upper and lower straightening rollers. This adapts to automotive sheet metal of different thicknesses and solves the problem of traditional devices having fixed roller spacing or simple manual adjustment, which makes it difficult to adapt to different sheet metal mechanical properties. It can effectively avoid over-straightening and under-straightening, adapt to the straightening needs of various sheet metals, and meet the processing requirements of different specifications of sheet metal in automotive manufacturing.

[0012] This automotive sheet metal surface flatness correction device flexibly adjusts the air pressure in the inflation chamber to suit automotive sheet metal with different surface requirements. For ordinary structural parts with low surface requirements, inflation increases the stiffness of the elastic skin and increases the positive pressure, thereby improving correction efficiency. For high-gloss sheet metal with high surface requirements, degassing reduces the skin stiffness, forming a flexible buffer layer to avoid roller surface damage and stress concentration, ensuring the surface quality of the sheet metal. This makes the roller surface both flexible and self-adaptive, meeting the correction needs of high-quality automotive sheet metal.

[0013] This automotive sheet metal surface flatness straightening device uses a transmission mechanism consisting of an electric motor, gearbox, and gear set to precisely drive the lower straightening roller to rotate. Together with the upper straightening roller, it achieves coordinated conveying and straightening of automotive sheet metal. When the sheet metal moves between the rollers, the elastic skin automatically deforms according to the shape of the sheet metal, closely adhering to apply a uniform straightening force, optimizing the coordination between the transmission and straightening processes, and ensuring stable and efficient operation of the straightening process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an automotive sheet metal surface flatness correction device proposed in this utility model; Figure 2 This is a schematic diagram of the connection structure between the end support and the mounting base of the automotive sheet metal surface flatness correction device proposed in this utility model; Figure 3 This is a schematic diagram of the connection structure between the lower straightening roller and the air tank of an automotive sheet metal surface flatness straightening device proposed in this utility model; Figure 4 This is a schematic diagram of the lower straightening roller structure of an automotive sheet metal surface flatness straightening device proposed in this utility model.

[0015] In the picture: 1. Support base; 2. End support; 3. Mounting base; 301. Servo motor; 302. Coupling; 303. Ball screw; 304. Sliding block; 305. Connecting rod; 306. Roller support; 307. Upper straightening roller; 308. Pressure sensor one; 4. Mounting roller hole; 401. Lower straightening roller; 402. Air pipe interface; 403. Connecting air pipe; 5. Support base; 501. Air tank; 502. Inflation pipe; 503. Solenoid valve; 6. Elastic skin; 7. Sealing rubber ring; 701. Pressure sensor two; 702. Inflation pipe plug; 8. Support plate; 801. Motor; 802. Gearbox; 803. First gear; 804. Second gear; 805. Third gear; 806. Fourth gear; 9. Linear guide rail; 901. Moving block; 10. Fixed support; 101. Operation panel. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0018] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0019] Example 1: Reference Figures 1-4 A device for correcting the flatness of automotive sheet metal surfaces includes a support base 1, two end supports 2 are symmetrically fixedly connected to the support base 1, and a mounting seat 3 is fixedly connected to each of the two end supports 2. A servo motor 301 is provided on the top of the mounting seat 3, and the output end of the servo motor 301 passes through the mounting seat 3 and is connected to a ball screw 303 through a coupling 302. A sliding block 304 is threadedly connected to the outer surface of the ball screw 303. A connecting rod 305 is fixedly connected to the bottom of the sliding block 304. A shaft hole is opened at the top of the connecting rod 305 for the ball screw 303 to pass through. A roller support 306 is fixedly connected to the bottom of the connecting rod 305. A placement hole is opened on the outer wall of the roller support 306. An upper straightening roller 307 is arranged between the two placement holes. A slot is opened on the outer surface of the upper straightening roller 307. A pressure sensor 308 is arranged in the slot.

[0020] Two mounting roller holes 4 are provided on the end support 2. A lower straightening roller 401 is provided in each of the two mounting roller holes 4. The lower straightening roller 401 has a hollow structure inside, forming a sealed cavity. The lower straightening roller 401 is provided with an air pipe interface 402 at its end. The end of the air pipe interface 402 is fitted with a connecting air pipe 403. A support base 5 is fixedly connected to one side of the support base 1. An air storage tank 501 is provided on the support base 5. An air pump is provided at the output end of the air storage tank 501. The air pump is connected to the connecting air pipe 403 through an inflation pipe 502. A solenoid valve 503 is provided at the end of the inflation pipe 502 near the air storage tank 501.

[0021] The outer surfaces of both lower straightening rollers 401 are covered with elastic skin 6. A sealing rubber ring 7 is provided between the elastic skin 6 and the lower straightening rollers 401. A pressure sensor 701 is provided in the sealed cavity of the lower straightening rollers 401. An air pipe plug 702 is sleeved on the end of the air pipe interface 402.

[0022] Linear guide rails 9 are fixedly connected to both sides of the inner wall of the mounting base 3, and a moving block 901 that cooperates with the linear guide rails 9 is fixedly connected to the outer wall of the sliding block 304.

[0023] A fixed support 10 is fixedly connected to the outer wall of the support base 1. An operation panel 101 is provided on the top of the fixed support 10. A PLC controller is provided inside the operation panel 101. The servo motor 301, pressure sensor 1 308, air tank 501, solenoid valve 503, pressure sensor 2 701, and motor 801 are all electrically connected to the PLC controller.

[0024] In this implementation scheme, before correcting the flatness of the automotive sheet metal surface, the operator first inputs relevant parameters through the operation panel 101 according to the thickness, material, or shape of the automotive sheet metal to be corrected. Then, the PLC controller calculates the appropriate roller spacing and corresponding air pressure parameters based on the input parameters. The PLC controller then sequentially controls the servo motor 301, air pump, and solenoid valve 503. When the servo motor 301 runs, it drives the ball screw 303 to rotate. As the ball screw 303 rotates, it... The threaded surface causes the sliding block 304 to move along the linear guide rail 9. When the sliding block 304 moves along the trajectory of the ball screw 303, it causes the connecting rod 305 to move. When the connecting rod 305 moves, it causes the roller support 306 at its bottom to move. When the roller support 306 moves, it causes the upper straightening roller 307 in the middle to move. When the upper straightening roller 307 moves, the distance between it and the lower straightening roller 401 can be adjusted, thereby adapting to the straightening of automotive sheet metal of different thicknesses and meeting the straightening needs of various sheet metals.

[0025] Furthermore, for ordinary structural components with lower surface requirements for automotive sheet metal, when the PLC controller controls the air pump and solenoid valve 503 to operate, the gas inside the air tank 501 is transported through the inflation pipe 502 to the connecting air pipe 403, and then through the connecting air pipe 403 to the air pipe interface 402 of the lower straightening roller 401. Thus, the gas enters the sealing cavity from the air pipe interface 402, inflating the sealing cavity. At this time, the stiffness of the elastic skin 6 surface increases, thereby providing greater positive pressure when in contact with the automotive sheet metal, allowing the elastic skin 6 to apply force more effectively. It is more direct and has higher correction efficiency. For example, for high-gloss automotive sheet materials with high surface requirements, the air pump slowly exhausts air from the air pipe interface 402 through the solenoid valve 503. At this time, the stiffness of the elastic skin 6 surface is reduced, so that the pressure of the elastic skin 6 is more uniform and the impact force is smaller when it is attached to the automotive sheet material. It also forms a flexible buffer layer when it is attached to the surface of the automotive sheet material, avoiding damage to the sheet material surface by the roller and reducing stress concentration. At the same time, the sealing rubber ring 7 can ensure the sealing between the elastic skin 6 and the lower straightening roller 401, thereby preventing gas leakage.

[0026] Example 2: Reference Figures 1-2 Based on Embodiment 1, a technical solution for a surface flatness correction device for automotive sheet metal is provided, including a support plate 8 fixedly connected to the outer wall of a support base 1, a motor 801 mounted on the support plate 8, a gearbox 802 connected to the output end of the motor 801, a first gear 803 connected to the output end of the gearbox 802, a second gear 804 meshing with the outer side of the first gear 803, a third gear 805 meshing with the outer side of the second gear 804, a middle part of the third gear 805 being movably connected to the outer wall of the end support 2 via a support rod, a fourth gear 806 meshing with the outer side of the third gear 805, and the middle parts of both the second gear 804 and the fourth gear 806 being fixedly connected to the lower straightening roller 401.

[0027] In this embodiment, when the surface of the automotive sheet metal is straightened, the connecting air pipe 403 is disconnected from the air pipe interface 402, and then the inflation pipe plug 702 is inserted into the air pipe interface 402 to ensure the sealing of the internal sealing cavity. Then, one end of the automotive sheet metal is fed between the upper straightening roller 307 and the lower straightening roller 401. At this time, the motor 801 is started. Since the output end of the motor 801 is connected to the input end of the gearbox 802, the rotational motion and power of the motor 801 are transmitted to the gearbox 802. The gearbox 802 adjusts the speed and torque input to the motor 801 through gear meshing and changes in the transmission ratio. The adjusted rotational motion and power are transmitted to the first gear 803, thereby driving the first gear 803 to rotate. When the first gear 803 rotates, it drives the second gear 804 to rotate. When wheel 804 rotates, it drives the third gear 805 to rotate. When the third gear 805 rotates, it drives the fourth gear 806 to rotate. Thus, when the second gear 804 and the fourth gear 806 rotate, they sequentially drive the two lower straightening rollers 401 to rotate. As the lower straightening rollers 401 rotate, they convey the automotive sheet material in the middle. As the automotive sheet material moves on the roller surface between the upper straightening roller 307 and the lower straightening roller 401, its elastic skin 6 automatically deforms according to the shape of the automotive sheet material under the action of air pressure in the sealed cavity, closely adhering to the surface of the automotive sheet material and applying a uniform straightening force to the automotive sheet material, thereby achieving the correction of the flatness of the automotive sheet material surface.

[0028] Furthermore, during the straightening process, pressure sensor 308 on the surface of the upper straightening roller 307 is used to detect the pressure on the automotive sheet metal in real time, and pressure sensor 701 at the sealed cavity is used to detect the air pressure inside. Then, pressure sensor 308 and pressure sensor 701 feed back the detected data to the PLC controller. At this time, the PLC controller compares the data fed back by pressure sensor 308 with the preset pressure range. If the pressure exceeds the range, the PLC controller automatically controls the servo motor 301 to fine-tune the roller spacing between the upper straightening roller 307 and the lower straightening roller 401 to ensure that the pressure on the surface of the automotive sheet metal is uniform. At the same time, if the air pressure inside the sealed cavity fluctuates, the PLC controller automatically controls the air pump and solenoid valve 503 to adjust, ensuring that the elastic skin 6 always maintains a suitable curvature and stiffness, thereby achieving precise straightening and achieving the best straightening effect.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for correcting the surface flatness of automotive sheet metal, comprising a support base (1), characterized in that, Two end supports (2) are symmetrically fixedly connected to the support base (1). Each of the two end supports (2) is fixedly connected to a mounting base (3). A servo motor (301) is provided on the top of the mounting base (3). The output end of the servo motor (301) passes through the mounting base (3) and is connected to a ball screw (303) through a coupling (302). The outer surface of the ball screw (303) is connected to a sliding block (304) by a thread. The bottom of the sliding block (304) is fixedly connected to a connecting rod (305). The top of the connecting rod (305) is provided with a shaft hole through which the ball screw (303) can pass. The bottom of the connecting rod (305) is fixedly connected to a roller support (306). The outer wall of the roller support (306) is provided with a placement hole. An upper straightening roller (307) is provided between the two placement holes. The outer surface of the upper straightening roller (307) is provided with a slot. A pressure sensor (308) is provided in the slot.

2. The automotive sheet metal surface flatness correction device according to claim 1, characterized in that, The end support (2) has two mounting roller holes (4), and each of the two mounting roller holes (4) is provided with a lower straightening roller (401). The lower straightening roller (401) has a hollow structure inside, forming a sealed cavity inside. The lower straightening roller (401) is provided with an air pipe interface (402) at its end. The end of the air pipe interface (402) is fitted with a connecting air pipe (403). A support base (5) is fixedly connected to one side of the support base (1). An air storage tank (501) is provided on the support base (5). An air pump is provided at the output end of the air storage tank (501). The air pump is connected to the connecting air pipe (403) through an inflation pipe (502). A solenoid valve (503) is provided at the end of the inflation pipe (502) near the air storage tank (501).

3. The automotive sheet metal surface flatness correction device according to claim 2, characterized in that, The outer surfaces of the two lower straightening rollers (401) are covered with elastic skin (6), and a sealing rubber ring (7) is provided between the elastic skin (6) and the lower straightening roller (401). A pressure sensor (701) is provided in the sealed cavity of the lower straightening roller (401), and an air plug (702) is sleeved on the end of the air pipe interface (402).

4. The automotive sheet metal surface flatness correction device according to claim 2, characterized in that, A support plate (8) is fixedly connected to the outer wall of the support base (1). An electric motor (801) is provided on the support plate (8). The output end of the electric motor (801) is connected to a gearbox (802). The output end of the gearbox (802) is connected to a first gear (803). A second gear (804) is meshed with the outer side of the first gear (803). A third gear (805) is meshed with the outer side of the second gear (804). The middle part of the third gear (805) is movably connected to the outer wall of the end support (2) through a support rod. A fourth gear (806) is meshed with the outer side of the third gear (805). The middle parts of the second gear (804) and the fourth gear (806) are both connected and fixed to the lower straightening roller (401).

5. The automotive sheet metal surface flatness correction device according to claim 1, characterized in that, Linear guide rails (9) are fixedly connected to both sides of the inner wall of the mounting base (3), and a moving block (901) that cooperates with the linear guide rails (9) is fixedly connected to the outer wall of the sliding block (304).

6. The automotive sheet metal surface flatness correction device according to claim 4, characterized in that, The outer wall of the support base (1) is fixedly connected to a fixed support (10). The top of the fixed support (10) is provided with an operation panel (101). The operation panel (101) is equipped with a PLC controller. The servo motor (301), pressure sensor one (308), air tank (501), solenoid valve (503), pressure sensor two (701), and motor (801) are all electrically connected to the PLC controller.

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