Arc-shaped friction plate end face deburring device

Abstract

This invention discloses a deburring device for the end face of an arc-shaped friction plate, comprising a frame, a worktable, an inner arc-shaped contouring base, an outer arc-shaped clamping mechanism, a centering mechanism, and a dual-end-face synchronous deburring system. The inner arc-shaped contouring base is fixed to the worktable, and its upper surface has an arc-shaped groove matching the inner arc surface of the workpiece. The centering mechanism pushes the workpiece to the centered position before clamping. The dual-end-face synchronous deburring system includes deburring units symmetrically arranged on both sides of the contouring base. Each unit includes a slide, a relative drive mechanism, a grinding spindle, and a floating grinding head. The relative drive mechanism drives the two slides to move synchronously relative to each other or in opposite directions. This invention achieves surface contact positioning through the inner arc-shaped contouring base, ensures consistent machining allowances on both end faces through an independent centering mechanism, and avoids secondary clamping errors through dual-end-face synchronous machining, thereby improving positioning accuracy, machining efficiency, and end-face quality.

Description

Technical Field

[0001] This invention relates to the field of friction plate processing technology, and specifically to a deburring device for the end face of an arc-shaped friction plate. Background Technology

[0002] Arc-shaped friction pads are key friction components widely used in automotive drum brakes, clutches, and braking systems of engineering machinery. After the arc-shaped friction pads are punched, precision-cut, or ground, burrs and flash inevitably form on their two end faces (the two ends along the arc length). If these burrs are not removed completely, they will lead to reduced fitting accuracy during assembly, abnormal noise and vibration during braking, and even friction material chipping due to localized stress concentration, seriously affecting braking safety and service life.

[0003] Currently, the main technical drawbacks of the deburring process for the end face of arc-shaped friction plates are as follows: Firstly, workpiece positioning is difficult, resulting in low centering accuracy. The arc-shaped friction pad has a specific inner arc surface curvature. Existing deburring devices typically rely solely on simple V-blocks or flat support plates for positioning, failing to achieve precise centering along the workpiece's arc length. Due to manufacturing tolerances between the workpiece and the positioning base, the workpiece often shifts to the left or right after placement, leading to inconsistent machining allowances on both ends and resulting in over-grinding on one end and burr residue on the other.

[0004] Secondly, processing both end faces requires separate steps, resulting in low efficiency and accumulated errors. Traditional automated deburring equipment mostly uses a single grinding head structure, processing one end face first, and then using a flipping mechanism or robotic arm to turn the workpiece around before processing the other end face. Multiple clamping not only significantly reduces production efficiency but also introduces accumulated positioning errors, making it difficult to guarantee the parallelism and symmetry of the two end faces.

[0005] Third, there is a lack of a centering mechanism that coordinates with the clamping action. In existing devices, the centering and clamping of the workpiece are usually accomplished by separate actuators, which not only increases the complexity of the power source and control system, but also makes it difficult to accurately match the timing of the actions, and easily leads to the problem of the workpiece shifting again when clamping is completed after centering. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a deburring device for the end face of an arc-shaped friction plate, which aims to achieve high-precision centering and positioning of the workpiece and synchronous and efficient processing of both end faces.

[0007] To achieve the above objectives, the present invention provides a deburring device for the end face of an arc-shaped friction plate, comprising: A frame on which a worktable is mounted; An inner arc-shaped contour base is fixed on the worktable, and the upper surface of the inner arc-shaped contour base is provided with an arc-shaped groove that matches the inner arc surface of the arc-shaped friction pad to be processed. An outer arc surface pressing mechanism is mounted on the frame and located directly above the inner arc surface contour base. It is used to press the arc-shaped friction piece to be processed on the inner arc surface contour base onto the inner arc surface contour base. The centering mechanism is set on the frame and is used to center the arc-shaped friction piece to be processed on the inner arc-shaped contour base before the outer arc-shaped pressing mechanism presses the arc-shaped friction piece to be processed. The dual-end-face synchronous deburring system includes deburring units symmetrically arranged on both sides of the inner arc-shaped base. Each deburring unit includes a slide, a relative drive mechanism, a grinding spindle, and a floating grinding head arranged at the output end of the grinding spindle. The relative drive mechanism is connected to the two slides and is used to drive the two slides to move synchronously relative to each other or in opposite directions.

[0008] Furthermore, the outer arc surface pressing mechanism includes a pressing cylinder and an arc-shaped pressure plate. The arc-shaped pressure plate is connected to the lower end of the piston rod of the pressing cylinder, and the lower surface of the arc-shaped pressure plate matches the outer arc surface of the arc-shaped friction plate.

[0009] Furthermore, the centering mechanism includes two guide blocks, push rods, and a push-pull linear motion drive source. The two guide blocks are arranged opposite to each other on the left and right sides of the inner arc-shaped contour base and fixed on the frame. The guide blocks have guide holes perpendicular to the side wall of the inner arc-shaped contour base. The push rods are slidably fitted in the guide holes. The push-pull linear motion drive source is connected to the two push rods and is used to drive the two push rods to move towards the center or move away from the sides simultaneously before the arc-shaped pressure plate presses the arc-shaped friction piece to be processed.

[0010] Furthermore, the push-pull linear motion drive source includes a linkage plate, a vertical connecting rod, a wedge-shaped push block, and a first elastic reset member. The linkage plate is fixed on the piston rod, and the two vertical connecting rods are fixed at both ends of the linkage plate. Each vertical connecting rod has a wedge-shaped push block connected to its bottom. The wedge-shaped push block has a lower wedge-shaped surface located below, an upper wedge-shaped surface located above, and an intermediate plane located between the upper wedge-shaped surface and the lower wedge-shaped surface. The intermediate plane is a vertical plane. The first elastic reset member is connected between the push rod and the guide block to provide a reset force for the push rod to move away from the inner arc-shaped contour base. During the downward movement of the wedge-shaped push block, the rear end of the push rod can slide and abut against the upper wedge-shaped surface, the middle plane and the lower wedge-shaped surface in sequence. During this process, the front end of the push rod pushes the arc-shaped friction piece to be processed to move on the inner arc-shaped contour base to achieve centering.

[0011] Furthermore, the relative driving mechanism includes a lifting block and a raising push plate. The lifting block is fixed between the inner arc-shaped base and the guide block. The lifting guide block has a downwardly inclined lifting surface on the side near the guide block. The raising push plate is arranged laterally and can slide up and down and back and forth on the guide block. The slide is fixed on the raising push plate. The inner end of the raising push plate slides against the lifting surface. During the process of the wedge-shaped push block continuing to descend after disengaging from the push rod, the wedge-shaped push block can slide against the outer end of the raising push plate and push the raising push plate to move inward while being raised upward by the lifting surface. When the wedge-shaped push block descends to a preset position, the floating grinding head and the arc-shaped friction plate to be processed are at the same height and close to the side wall of the arc-shaped friction plate to be processed. The outer arc-shaped pressing mechanism presses the arc-shaped friction plate to be processed into place.

[0012] Furthermore, it also includes an angle adjustment mechanism connected between the slide and the grinding spindle, used to adjust the angle between the grinding spindle and the end face of the arc-shaped friction plate to be processed, thereby ensuring that the working surface of the floating grinding head is always adapted to the end face of the arc-shaped friction plate to be processed.

[0013] Furthermore, the angle adjustment mechanism includes a ball joint and a clamping assembly. The ball joint is disposed on the grinding spindle, and the slide is provided with a spherical mounting hole adapted to the ball joint. The ball joint is rotatably disposed in the spherical mounting hole, and the clamping assembly is disposed on the slide for locking and fixing the ball joint.

[0014] Furthermore, the clamping assembly includes a linkage rod and a top rod. The slide table has an insertion hole perpendicular to the side wall of the inner arc-shaped base. The linkage rod is slidably inserted into the insertion hole. The front end of the linkage rod extends towards the inner arc-shaped base, and the rear end of the linkage rod is located within the insertion hole. The upper surface of the rear end of the linkage rod has an inclined surface. A connecting hole is vertically provided on the slide table, connecting the spherical mounting hole to the insertion hole. The top rod is slidably disposed within the connecting hole, and its bottom end abuts against the inclined surface. When the front end of the linkage rod is abutted by the inner arc-shaped base, forcing the linkage rod to move into the insertion hole, the linkage rod pushes the top rod upwards through the inclined surface, causing the upper end of the top rod to abut against the ball joint, thus locking and fixing the ball joint.

[0015] Furthermore, it also includes an elastic floating mechanism, which is connected between the output shaft of the grinding spindle and the floating grinding head. The elastic floating mechanism includes a sleeve, a compression spring installed in the sleeve, and a guide piston. The rear end of the sleeve is fixedly connected to the output shaft of the grinding spindle through a flange, and the front end of the guide piston is fixedly connected to the floating grinding head. The compression spring is disposed between the sleeve and the guide piston, so that the floating grinding head has an axial floating stroke relative to the grinding spindle.

[0016] Furthermore, a coolant spraying device is provided on the workbench.

[0017] The beneficial effects of this invention are: The above-mentioned deburring device for the end face of the arc-shaped friction plate has at least the following advantages: 1. By setting a centering mechanism independent of the outer arc surface clamping mechanism, the workpiece is first pushed to the center position on the inner arc surface contour base before clamping, so that the left and right ends of the workpiece are symmetrically arranged relative to the contour base. This solves the problem of one end being over-grinded and the other end not being ground due to workpiece misalignment, ensuring the uniformity and consistency of deburring on both ends.

[0018] 2. The dual-end-face synchronous deburring system employs two symmetrically arranged deburring units. A relative drive mechanism drives the left and right slides to move synchronously relative to each other, allowing two floating grinding heads to simultaneously contact and process the left and right end faces of the workpiece. Compared to the traditional process of processing one end first, then flipping and processing the other end, this device eliminates the need to flip the workpiece or perform secondary clamping, reducing single-piece processing time by more than 50%. It also completely avoids positioning errors caused by secondary clamping, significantly improving the parallelism and symmetry of the two end faces.

[0019] 3. The upper surface of the inner arc-shaped base is provided with an arc-shaped groove that perfectly matches the inner arc surface of the workpiece, so that the workpiece is placed with the inner arc surface facing down to form a surface contact fit. Compared with the traditional point contact or line contact positioning method, surface contact positioning greatly improves the positioning stability and resistance to lateral forces of the workpiece, laying a solid foundation for subsequent precision deburring processing.

[0020] 4. The centering mechanism completes the centering operation before the outer arc surface clamping mechanism operates. Subsequently, the outer arc surface clamping mechanism clamps and fixes the workpiece from above. The two mechanisms operate in a time-sharing manner, which ensures that the workpiece can move freely during the centering process and avoids interference from the centering mechanism with the machining area after clamping. The structure is reasonable and highly reliable. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of a deburring device for the end face of an arc-shaped friction plate according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram showing the wedge-shaped pusher pushing the push rod to the centering position in the deburring device for the end face of the arc-shaped friction plate; Figure 3 for Figure 1 The diagram shows a wedge-shaped pusher disengaging from the push rod in the deburring device for the end face of the arc-shaped friction plate, indicating that the slide table is raised. Figure 4 for Figure 1 The diagram shows a deburring device for the end face of an arc-shaped friction plate, in which the wedge-shaped push block separates from the push rod and enters a state where the slide table is raised, the floating grinding head is in the working position, and the linkage rod and the inner arc-shaped contour base are in a close-to-each state. Figure 5 for Figure 1 A schematic diagram of the angle adjustment mechanism and the elastic floating mechanism in the deburring device for the end face of the arc-shaped friction plate shown; Figure 6 for Figure 1 The diagram shows the grinding spindle being adjusted to a certain angle and the ball joint being locked in place in the deburring device for the end face of the arc-shaped friction plate. Figure label: 1. The arc-shaped friction plate to be processed; 100. Frame; 200. Inner arc surface contour base; 300. Outer arc surface clamping mechanism; 310. Clamping cylinder; 320. Arc-shaped pressure plate; 400. Centering mechanism; 410. Guide block; 420. Push rod; 430. Push-pull linear motion drive source; 431. Linkage plate; 432. Vertical connecting rod; 433. Wedge-shaped push block; 434. First elastic reset component; 500. Double-end face synchronous deburring system; 510. Slide table; 520. Relative drive mechanism; 521. Lifting block; 522. Lifting push plate; 523. Lifting surface; 530. Grinding spindle; 540. Floating grinding head; 600. Angle adjustment mechanism; 610. Ball joint; 620. Clamping assembly; 621. Linkage rod; 622. Push rod; 700. Elastic floating mechanism; 710. Sleeve; 720. Guide piston. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Please see Figures 1 to 6 The present invention provides a deburring device for the end face of an arc-shaped friction plate, including a frame 100, an inner arc-shaped contour base 200, an outer arc-shaped pressing mechanism 300, a centering mechanism 400, and a dual-end-face synchronous deburring system 500.

[0025] Specifically, the frame 100 is gantry-shaped and welded from square steel tubes, providing sufficient rigidity and stability. A horizontal worktable is mounted on the upper part of the frame 100, with a flat surface.

[0026] The inner arc-shaped contour base 200 is fixed to the center of the worktable by bolts. The upper surface of the inner arc-shaped contour base 200 is provided with an arc-shaped groove that matches the inner arc surface of the arc-shaped friction plate 1 to be processed.

[0027] The outer arc surface pressing mechanism 300 is mounted on the frame 100 above the worktable, located directly above the inner arc surface contour base 200. This pressing mechanism is used to press the arc-shaped friction piece 1 to be processed, which is placed on the inner arc surface contour base 200, downward, so that its inner arc surface fits tightly with the arc-shaped groove of the contour base.

[0028] The centering mechanism 400 is mounted on the frame 100 and located around the inner arc-shaped contour base 200. This centering mechanism 400 operates before the outer arc-shaped clamping mechanism 300 clamps the workpiece. It pushes the arc-shaped friction plate 1 to be processed onto the inner arc-shaped contour base 200 to a centered position, ensuring that the left and right ends of the workpiece are symmetrical relative to the contour base, providing an accurate positional reference for subsequent simultaneous deburring of both ends.

[0029] The dual-end-face synchronous deburring system 500 includes two deburring units symmetrically arranged on the left and right sides of the inner arc-shaped contour base 200. Each deburring unit includes a slide 510, a relative drive mechanism 520, a grinding spindle 530, and a floating grinding head 540. The slide 510 is mounted on the frame 100 via a linear guide rail and can slide horizontally (i.e., towards or away from the contour base). The relative drive mechanism 520 is simultaneously connected to both slides 510. This drive mechanism can be a bidirectional lead screw, a gear and rack synchronous mechanism, or a dual-motor synchronous control system. Its function is to drive the two slides 510 to move synchronously at the same speed in opposite directions—when the relative drive mechanism 520 is activated, the two slides 510 simultaneously move towards the center (relative movement) or simultaneously separate to the sides (opposite movement). The grinding spindle 530 is mounted on the slide 510 and moves with the slide 510, with its output end facing the contour base. The floating grinding head 540 is installed at the output end of the grinding spindle 530 and is used to directly contact the end face of the workpiece for deburring.

[0030] The working principle of this device is as follows: First, the arc-shaped friction plate is placed in the arc-shaped groove of the inner arc-shaped contour base 200 with its inner arc surface facing down. Since the curvature of the arc-shaped groove perfectly matches the inner arc surface of the workpiece, the workpiece achieves initial positioning in the arc direction. However, due to manufacturing tolerances between the workpiece and the contour base, the workpiece may be offset to the left or right in the arc length direction, meaning the positions of the two end faces relative to the contour base are asymmetrical. At this point, the centering mechanism 400 is activated, simultaneously pushing the workpiece from both sides, causing it to move along the arc length direction within the arc-shaped groove until the center of the workpiece aligns with the center of the contour base, achieving precise centering.

[0031] After centering, the outer arc surface clamping mechanism 300 moves downward to press the outer arc surface of the workpiece from above, firmly fixing the workpiece on the inner arc surface contour base 200. At this time, all six degrees of freedom of the workpiece are fully constrained: the inner arc surface fitting with the contour base restricts three degrees of freedom, the outer arc surface clamping restricts the vertical degree of freedom, and the centering mechanism 400 ensures symmetry in the left and right directions.

[0032] Subsequently, the relative drive mechanism 520 drives the two slides 510 to move synchronously towards the center, causing the grinding spindle 530 and the floating grinding head 540 to approach the workpiece end face. When the floating grinding head 540 contacts the workpiece end face, appropriate grinding pressure continues to be applied, while the grinding spindle 530 rotates, driving the floating grinding head 540 to grind and deburr the end face. Because the two grinding heads feed synchronously, the left and right end faces of the workpiece are processed simultaneously. After processing, the relative drive mechanism 520 drives the slides 510 to move in opposite directions, causing the grinding head to retract from the workpiece.

[0033] The aforementioned deburring device for the end face of the arc-shaped friction plate utilizes a centering mechanism 400 to ensure the workpiece is precisely centered before deburring, resulting in consistent machining allowances on both ends and preventing over-grinding on one end and under-grinding on the other due to workpiece misalignment. Simultaneously, the dual-end-face synchronous deburring system 500 enables simultaneous machining of both ends of the arc-shaped friction plate. Compared to the traditional process of machining one end first, flipping it, and then machining the other, production efficiency is more than doubled, while also avoiding positioning errors caused by secondary clamping. Furthermore, the surface contact between the inner arc-shaped contour base 200 and the inner arc surface of the workpiece significantly improves positioning stability and machining accuracy compared to traditional point or line contact positioning.

[0034] In this embodiment, the outer arc surface pressing mechanism 300 specifically includes a pressing cylinder 310 and an arc-shaped pressing plate 320. The pressing cylinder 310 is a double-acting cylinder, and its cylinder body is fixed to the frame 100 by a flange, located directly above the inner arc surface contour base 200, with the piston rod of the cylinder extending vertically downwards. The arc-shaped pressing plate 320 is fixed to the lower end of the piston rod of the pressing cylinder 310 by a threaded connection. The lower surface of the arc-shaped pressing plate 320 is machined with an outer arc surface, and the radius of curvature of the outer arc surface perfectly matches the curvature of the outer arc surface of the arc-shaped friction plate 1 to be processed. The arc length of the arc-shaped pressing plate 320 is slightly smaller than the arc length of the friction plate, which facilitates grinding.

[0035] The outer arc surface clamping mechanism 300 adopts a surface contact clamping method, which has the following advantages compared with the traditional solution of using elastic claws or point contact clamping: First, the clamping force is evenly distributed over the entire area of ​​the outer arc surface of the workpiece, avoiding local stress concentration that could damage the friction material. Second, the matching design of the arc-shaped pressure plate 320 with the outer arc surface of the workpiece not only clamps but also provides auxiliary positioning, further limiting the displacement of the workpiece in the arc length direction.

[0036] In this embodiment, the centering mechanism 400 includes two guide blocks 410, two push rods 420, and a push-pull linear motion drive source 430. The two guide blocks 410 are arranged opposite each other on the left and right sides of the inner arc-shaped contour base 200 and are fixed to the frame 100 by bolts. Each guide block 410 has a guide hole, the axis of which is perpendicular to the corresponding side wall of the inner arc-shaped contour base 200 (i.e., horizontally pointing towards the center of the contour base). The two push rods 420 are slidably fitted into the guide holes of the two guide blocks 410, with the front end of the push rod 420 facing the contour base and the rear end connected to the push-pull linear motion drive source 430. The push-pull linear motion drive source 430 is simultaneously connected to the two push rods 420, and its function is to drive the two push rods 420 to simultaneously move towards the center (i.e., towards the center of the contour base) or simultaneously move away from both sides (i.e., away from the center of the contour base) before the arc-shaped pressure plate 320 presses the workpiece.

[0037] After the workpiece is placed on the inner arc-shaped contour base 200, it may be positioned slightly to the left or right. At this point, the push-pull linear motion drive source 430 is activated, driving the two push rods 420 to move synchronously towards the center. The front ends of the push rods 420 first contact the left and right end faces of the workpiece, and then continue to advance, pushing the workpiece to slide along the arc length within the arc-shaped groove until the center of the workpiece is aligned with the center of the contour base. Since the two push rods 420 move at the same speed and with the same stroke, when both are in contact with the end faces of the workpiece and the workpiece stops moving, the workpiece will inevitably be in the centered position. After alignment, the push-pull linear motion drive source 430 drives the two push rods 420 to move synchronously to both sides, making room for subsequent clamping and deburring actions.

[0038] Please see Figure 2 , Figure 3 and Figure 4In this embodiment, the push-pull linear motion drive source 430 includes a linkage plate 431, vertical connecting rods 432, a wedge-shaped push block 433, and a first elastic reset member 434. The linkage plate 431 is fixed to the piston rod of the pressing cylinder 310 of the outer arc surface pressing mechanism 300 and rises and falls synchronously with the piston rod. Two vertical connecting rods 432 are respectively fixed to the left and right ends of the linkage plate 431, and each vertical connecting rod 432 extends vertically downward, with a wedge-shaped push block 433 connected to its bottom. The wedge-shaped push block 433 has three working surfaces: an upper wedge-shaped surface (inclined surface) located at the top, a lower wedge-shaped surface (inclined surface) located at the bottom, and an intermediate plane located between the upper and lower wedge-shaped surfaces, which is a vertical plane. The upper and lower wedge-shaped surfaces have opposite inclination directions, making the cross-section of the wedge-shaped push block 433 "X" shaped or rhomboid. The first elastic reset element 434 (e.g., a compression spring) is connected between the push rod 420 and the guide block 410. Its elastic force direction causes the push rod 420 to tend to move away from the inner arc surface contour base 200. That is, when there is no external force, the rear end of the push rod 420 always abuts against the wedge-shaped push block 433, while the front end of the push rod 420 retracts into the guide block 410 or maintains a gap with the end face of the workpiece.

[0039] The drive source uses the downward movement of the clamping cylinder 310 to drive the centering action, realizing the timing linkage between clamping and centering without the need for an additional power source.

[0040] The specific work process is as follows: Initial state: The piston rod of the clamping cylinder 310 is at its maximum rising position, and the linkage plate 431 and the wedge-shaped push block 433 are at their highest points. At this time, the rear end of the push rod 420 is in contact with the lower wedge-shaped surface of the wedge-shaped push block 433. Due to the inclination direction of the upper wedge-shaped surface (gradually inclining inward from bottom to top), the push rod 420 is pulled inward (i.e., away from the contour base) under the action of the first elastic reset member 434, and the front end of the push rod 420 retracts and does not contact the workpiece.

[0041] Centering Phase: When the clamping cylinder 310 begins to descend, the piston rod drives the linkage plate 431 and the wedge-shaped push block 433 to move downwards. The rear end of the push rod 420 slides downwards relative to the upper wedge surface of the wedge-shaped push block 433. Due to the shape of the lower wedge surface, the rear end of the push rod 420 is gradually pushed towards the center (i.e., towards the contour base). The push rod 420 overcomes the elastic force of the first elastic reset member 434, and its front end gradually approaches the end face of the workpiece. When the wedge-shaped push block 433 continues to descend until the rear end of the push rod 420 contacts the intermediate plane, the distance pushed by the push rod 420 reaches its maximum value. At this time, the front end of the push rod 420 has pushed the workpiece to the center position. In the intermediate plane section, since the intermediate plane is a vertical plane, the position of the push rod 420 remains unchanged, and the workpiece remains in the center position.

[0042] During the clamping stage: The wedge-shaped pusher 433 continues to descend, and the rear end of the pusher 420 enters the upper wedge surface area. The inclination direction of the lower wedge surface is opposite to that of the lower wedge surface (gradually inclining outwards from bottom to top), so the rear end of the pusher 420 gradually moves outwards. Under the action of the first elastic reset member 434, the pusher 420 begins to retract, and its front end gradually leaves the workpiece end face, making room for subsequent grinding. When the wedge-shaped pusher 433 descends to the lowest point (i.e., the arc-shaped pressure plate 320 has completely clamped the workpiece), the front end of the pusher 420 has completely retracted and is no longer in contact with the workpiece.

[0043] Reset stage: After processing is completed, the clamping cylinder 310 rises, the wedge-shaped push block 433 moves upward accordingly, and the rear end of the push rod 420 passes through the upper wedge surface, the middle plane and the lower wedge surface in sequence, and automatically resets under the action of the first elastic reset member 434.

[0044] Please see Figure 1 and Figure 4 In this embodiment, the relative driving mechanism 520 includes a lifting block 521 and a lifting push plate 522. The lifting block 521 is fixed between the inner arc-shaped base 200 and the guide block 410. The lifting guide block 410 has a downwardly inclined lifting surface 523 on the side near the guide block 410. The lifting push plate 522 is arranged laterally and is inserted into the guide block 410, which can slide up and down and back and forth. The slide table 510 is fixed on the lifting push plate 522. The inner end of the lifting push plate 522 is connected to the top. The lifting surface 523 can slide and abut. During the downward movement of the wedge-shaped push block 433 after it disengages from the push rod 420, the wedge-shaped push block 433 can slide and contact the outer end of the lifting push plate 522. While pushing the lifting push plate 522 to move inward, it is lifted upward by the lifting surface 523. When the wedge-shaped push block 433 descends to the preset position, the floating grinding head 540 and the arc-shaped friction plate 1 to be processed are at the same horizontal height. The outer arc surface pressing mechanism 300 presses the arc-shaped friction plate 1 to be processed into place.

[0045] In use, after the wedge-shaped push block 433 disengages from the push rod 420, it continues to descend. The push rod 420 is pulled back and reset by the first elastic reset member 434, clearing the side position of the workpiece to be processed to prevent interference. Then the wedge-shaped push block 433 continues to descend until it contacts the outer end of the lifting push plate 522. The lower wedge surface can push the lifting push plate 522 to move inward, and at the same time, it is lifted upward under the action of the lifting surface 523. When the outer arc surface pressing mechanism 300 presses the arc friction plate 1 to be processed into place, the floating grinding head 540 advances and rises to the same height as the arc friction plate 1 to be processed and close to the side wall of the surface to be processed, so that the surface to be processed can be processed.

[0046] Please see Figure 1 , Figure 5 and Figure 6In a preferred embodiment, the device further includes an elastic floating mechanism 700, which is connected between the output shaft of the grinding spindle 530 and the floating grinding head 540. The elastic floating mechanism 700 specifically includes a sleeve 710, a compression spring, and a guide piston 720. The sleeve 710 has a cylindrical structure, and its rear end is fixedly connected to the output shaft of the grinding spindle 530 via a flange, with the two fastened together by bolts. The inner bore of the sleeve 710 is a cylindrical hole. The guide piston 720 has a stepped shaft shape, with its front end (the end with the larger diameter) fixedly connected to the floating grinding head 540, and its rear end (the end with the smaller diameter) inserted into the inner bore of the sleeve 710, and can slide axially. The compression spring is installed in the inner bore of the sleeve 710, located between the bottom of the sleeve 710 and the rear end face of the guide piston 720, and is always in a compressed state, applying a forward elastic force to the guide piston 720.

[0047] When the slide table 510 drives the grinding spindle 530 forward, the floating grinding head 540 first contacts the workpiece end face. As the feed continues, the workpiece end face generates a rearward reaction force on the floating grinding head 540. This reaction force compresses the compression spring through the guide piston 720, causing the floating grinding head 540 to have a rearward axial displacement relative to the grinding spindle 530. When the spring force of the compression spring and the workpiece reaction force reach equilibrium, the floating grinding head 540 stops retracting. During this process, the grinding pressure is determined by the compression amount of the compression spring, not by the feed rate. Since the spring force is proportional to the compression amount, as long as the feed rate is controlled to maintain an appropriate compression amount of the spring, the grinding pressure is controlled within a preset range. When the machining is finished and the slide table 510 retracts, the compression spring releases energy, pushing the guide piston 720 and the floating grinding head 540 to reset.

[0048] The flexible floating mechanism 700 has the following functions: First, it enables flexible grinding, avoiding rigid impact. When there are minor unevenness or dimensional deviations on the workpiece end face, the floating grinding head 540 can adaptively retract or advance, always maintaining stable grinding pressure and preventing workpiece chipping or grinding head damage due to excessive feed. Second, the spring force of the compression spring can be preset (by changing springs of different stiffness), allowing the grinding pressure to be adjusted according to the hardness of the friction plate material, providing wide adaptability.

[0049] Please see Figure 5 and Figure 6As a further preferred embodiment, the device also includes an angle adjustment mechanism 600, which is connected between the slide table 510 and the grinding spindle 530. This mechanism is used to adjust the angle between the grinding spindle 530 and the end face of the arc-shaped friction plate 1 to be processed. During actual processing, after the arc-shaped friction plate 1 is clamped, some of its end faces are not necessarily perpendicular to the ground, but rather at an angle. If the grinding spindle 530 is horizontal, the working surface of the floating grinding head 540 will not be able to fully contact the end face, resulting in uneven grinding. The function of the angle adjustment mechanism 600 is to allow the grinding spindle 530 to deflect around an axis perpendicular to the feed direction, thereby ensuring that the working surface of the floating grinding head 540 always remains parallel to the end face of the workpiece (i.e., the optimal contact angle).

[0050] Specifically, in this embodiment, the angle adjustment mechanism 600 includes a ball joint 610 and a clamping assembly 620. The ball joint 610 is a spherical connector, fixedly mounted on the housing of the grinding spindle 530 (or integrally machined with the housing of the grinding spindle 530). A spherical mounting hole is provided on the slide table 510, the inner spherical surface of which precisely matches the outer spherical surface of the ball joint 610, allowing the ball joint 610 to be rotatably mounted within the spherical mounting hole. The clamping assembly 620 is mounted on the slide table 510, and its function is to lock and fix the ball joint 610 within the spherical mounting hole after the grinding spindle 530 is adjusted to the desired angle.

[0051] The ball joint 610 structure allows the grinding spindle 530 to deflect in any direction in space, not just along a single axis. This is particularly useful for certain arc-shaped friction plates with complex end face shapes. When adjusting the angle, the clamping assembly 620 is released, and the ball joint 610 rotates freely within the spherical mounting hole. When the end face of the floating grinding head 540 abuts against the end face of the arc-shaped friction plate to be processed, the ball joint 610 rotates automatically and is then locked by the clamping assembly 620, preventing it from rotating further.

[0052] This method ensures that the grinding end face of the floating grinding head 540 is always parallel and in close contact with the end face to be processed, thus guaranteeing processing accuracy.

[0053] Specifically, the clamping assembly 620 includes a linkage rod 621 and a top rod 622. A socket is provided on the slide table 510, the axis of which is perpendicular to the side wall of the inner arc-shaped contour base 200 (i.e., horizontally, pointing towards the contour base). The linkage rod 621 is a slender rod that can be slidably inserted into the socket. The front end of the linkage rod 621 (the end closest to the contour base) extends towards the contour base and protrudes a certain length from the slide table 510. The rear end of the linkage rod 621 is located inside the socket. An inclined surface is machined on the upper surface of the rear end of the linkage rod 621, which gradually rises or falls from back to front. A vertical connecting hole is also provided on the slide table 510, the upper end of which connects to the spherical mounting hole, and the lower end connects to the socket. The push rod 622 is cylindrical and can be slidably installed in the connecting hole. The bottom end of the push rod 622 abuts against the inclined surface of the rear end of the linkage rod 621, and the top end of the push rod 622 is opposite to the ball joint 610.

[0054] The specific work process is as follows: When the slide table 510 is in a position away from the contour base, the front end of the linkage rod 621 is not pressed against by any object. At this time, the linkage rod 621 is in an outwardly extended state under the action of its own reset mechanism (such as a small spring, not shown in the figure). The inclined surface of the rear end of the linkage rod 621 is located at a lower position below the bottom end of the push rod 622. The push rod 622 is in a lower position under the action of gravity or an auxiliary spring. There is a gap between the top end of the push rod 622 and the ball joint 610, allowing the ball joint 610 to rotate freely.

[0055] As the slide table 510 moves towards the contour base (i.e., feeds), the front end of the linkage rod 621 gradually approaches the side wall of the contour base. When the slide table 510 moves to a certain position (at which point the grinding spindle 530 has not yet been fully fed into position), the front end of the linkage rod 621 begins to contact the side wall of the contour base. As the slide table 510 continues to feed, the side wall of the contour base pushes the linkage rod 621 into the insertion hole (i.e., the linkage rod 621 moves backward relative to the slide table 510). As the linkage rod 621 moves backward, its rear end's inclined surface moves accordingly. Due to the change in the height of the inclined surface, the inclined surface gradually pushes the push rod 622 upward. As the push rod 622 rises, its upper end gradually approaches and finally abuts against the ball joint 610, pressing the ball joint 610 against the inner wall of the spherical mounting hole. The ball joint 610 is locked by friction, thus fixing the angle of the grinding spindle 530.

[0056] When the slide table 510 moves in opposite directions (i.e., retracts), the front end of the linkage rod 621 gradually moves away from the side wall of the contour base. Under the action of its reset mechanism, the linkage rod 621 moves forward to reset, the inclined surface retracts, the push rod 622 descends, the ball joint 610 is released, and the grinding spindle 530 returns to a free rotation state, which is convenient for angle adjustment before the next processing.

[0057] The clamping assembly 620 enables automatic locking and unlocking of the grinding spindle angle 530. The locking action is mechanically linked to the feed action of the slide table 510, requiring no independent control commands or drive components. Locking occurs just before the grinding head contacts the workpiece, at which point the grinding spindle angle 530 has already been set during the alignment process (or previous adjustments), and the angle remains unchanged after locking, ensuring stability during machining. Furthermore, unlocking occurs after the grinding head has withdrawn from the workpiece, allowing the operator to easily readjust the angle to accommodate the next batch of workpieces of different specifications.

[0058] In this device, a coolant spraying system is also installed on the worktable. This system includes a coolant tank, a pump, delivery pipelines, and nozzles. The nozzles are installed near the inner arc-shaped base 200, and their spray direction is aimed at the contact area between the left and right deburring units and the workpiece end face. The coolant can be water-based or oil-based, depending on the friction plate material.

[0059] During deburring, the grinding spindle 530 drives the floating grinding head 540 to rotate at high speed and rub against the workpiece end face, generating a large amount of heat. If the heat cannot be dissipated in time, it may cause the friction material to overheat and deteriorate, generate thermal stress cracks, or even burn. The coolant spray device is activated simultaneously when processing starts. The pump draws coolant from the storage tank and delivers it to the nozzles through pipelines. The nozzles spray the coolant into the grinding area in a mist or fine stream. After absorbing the grinding heat, the coolant flows into the collection tank, is filtered, and can be recycled.

[0060] In addition, an elastic buffer layer can be provided on the surface of the arc-shaped groove of the inner arc-shaped base 200 and the lower surface of the arc-shaped pressure plate 320. The elastic buffer layer is made of polyurethane or rubber material, with a thickness of 1 to 3 mm, and is fixed to the working surface of the base and pressure plate by vulcanization or bonding process.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A deburring device for the end face of an arc-shaped friction plate, characterized in that, include: A frame on which a worktable is mounted; An inner arc-shaped contour base is fixed on the worktable, and the upper surface of the inner arc-shaped contour base is provided with an arc-shaped groove that matches the inner arc surface of the arc-shaped friction pad to be processed. An outer arc surface pressing mechanism is mounted on the frame and located directly above the inner arc surface contour base. It is used to press the arc-shaped friction piece to be processed on the inner arc surface contour base onto the inner arc surface contour base. The centering mechanism is set on the frame and is used to center the arc-shaped friction piece to be processed on the inner arc-shaped contour base before the outer arc-shaped pressing mechanism presses the arc-shaped friction piece to be processed. The dual-end-face synchronous deburring system includes deburring units symmetrically arranged on both sides of the inner arc-shaped base. Each deburring unit includes a slide, a relative drive mechanism, a grinding spindle, and a floating grinding head arranged at the output end of the grinding spindle. The relative drive mechanism is connected to the two slides and is used to drive the two slides to move synchronously relative to each other or in opposite directions.

2. The deburring device for the end face of the arc-shaped friction plate according to claim 1, characterized in that, The outer arc surface pressing mechanism includes a pressing cylinder and an arc-shaped pressure plate. The arc-shaped pressure plate is connected to the lower end of the piston rod of the pressing cylinder, and the lower surface of the arc-shaped pressure plate matches the outer arc surface of the arc-shaped friction plate.

3. The deburring device for the end face of the arc-shaped friction plate according to claim 2, characterized in that, The centering mechanism includes two guide blocks, push rods, and a push-pull linear motion drive source. The two guide blocks are arranged opposite to each other on the left and right sides of the inner arc-shaped contour base and fixed on the frame. The guide blocks have guide holes perpendicular to the side wall of the inner arc-shaped contour base. The push rods are slidably fitted in the guide holes. The push-pull linear motion drive source is connected to the two push rods and is used to drive the two push rods to move towards the center or move away from the sides simultaneously before the arc-shaped pressure plate presses the arc-shaped friction plate to be processed.

4. The deburring device for the end face of the arc-shaped friction plate according to claim 3, characterized in that, The push-pull linear motion drive source includes a linkage plate, vertical connecting rods, wedge-shaped push blocks, and a first elastic reset component. The linkage plate is fixed on the piston rod, and the two vertical connecting rods are fixed at both ends of the linkage plate. Each vertical connecting rod has a wedge-shaped push block connected to its bottom. The wedge-shaped push block has a lower wedge-shaped surface located below, an upper wedge-shaped surface located above, and an intermediate plane located between the upper wedge-shaped surface and the lower wedge-shaped surface. The intermediate plane is a vertical plane. The first elastic reset member is connected between the push rod and the guide block to provide a reset force for the push rod to move away from the inner arc-shaped contour base. During the downward movement of the wedge-shaped push block, the rear end of the push rod can slide and abut against the upper wedge-shaped surface, the middle plane and the lower wedge-shaped surface in sequence. During this process, the front end of the push rod pushes the arc-shaped friction piece to be processed to move on the inner arc-shaped contour base to achieve centering.

5. The deburring device for the end face of the arc-shaped friction plate according to claim 4, characterized in that, The relative driving mechanism includes a lifting block and a raising push plate. The lifting block is fixed between the inner arc-shaped base and the guide block. The lifting guide block has a downwardly inclined lifting surface on the side near the guide block. The raising push plate is arranged laterally and can slide up and down and back and forth on the guide block. The slide is fixed on the raising push plate. The inner end of the raising push plate slides against the lifting surface. During the process of the wedge-shaped push block continuing to descend after disengaging from the push rod, the wedge-shaped push block can slide against the outer end of the raising push plate and push the raising push plate inward while being raised upward by the lifting surface. When the wedge-shaped push block descends to a preset position, the floating grinding head is at the same height as the arc-shaped friction plate to be processed and is close to the side wall of the arc-shaped friction plate to be processed. The outer arc-shaped pressing mechanism presses the arc-shaped friction plate to be processed into place.

6. The deburring device for the end face of the arc-shaped friction plate according to claim 1 or 5, characterized in that, It also includes an angle adjustment mechanism, which is connected between the slide and the grinding spindle. The angle adjustment mechanism is used to adjust the angle between the grinding spindle and the end face of the arc-shaped friction plate to be processed, so as to ensure that the working surface of the floating grinding head is always adapted to the end face of the arc-shaped friction plate to be processed.

7. The deburring device for the end face of the arc-shaped friction plate according to claim 6, characterized in that, The angle adjustment mechanism includes a ball joint and a clamping assembly. The ball joint is mounted on the grinding spindle. The slide table is provided with a spherical mounting hole adapted to the ball joint. The ball joint is rotatably mounted in the spherical mounting hole. The clamping assembly is mounted on the slide table for locking and fixing the ball joint.

8. The deburring device for the end face of the arc-shaped friction plate according to claim 7, characterized in that, The clamping assembly includes a linkage rod and a top rod. The slide table has an insertion hole perpendicular to the side wall of the inner arc-shaped base. The linkage rod is slidably inserted into the insertion hole, with its front end extending towards the inner arc-shaped base and its rear end located within the insertion hole. The upper surface of the rear end of the linkage rod has an inclined surface. The slide table has a vertically opening connecting the spherical mounting hole to the insertion hole. The top rod is slidably disposed within the connecting hole, with its bottom end abutting against the inclined surface. When the front end of the linkage rod is abutted against by the inner arc-shaped base, forcing the linkage rod to move into the insertion hole, the linkage rod pushes the top rod upwards via the inclined surface, causing the upper end of the top rod to abut against the ball joint, thus locking and fixing the ball joint.

9. The deburring device for the end face of the arc-shaped friction plate according to claim 1, characterized in that, It also includes an elastic floating mechanism, which is connected between the output shaft of the grinding spindle and the floating grinding head. The elastic floating mechanism includes a sleeve, a compression spring installed in the sleeve, and a guide piston. The rear end of the sleeve is fixedly connected to the output shaft of the grinding spindle through a flange, and the front end of the guide piston is fixedly connected to the floating grinding head. The compression spring is disposed between the sleeve and the guide piston, so that the floating grinding head has an axial floating stroke relative to the grinding spindle.

10. The deburring device for the end face of the arc-shaped friction plate according to claim 1, characterized in that, The workbench is equipped with a coolant spray device.

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