Friction plate surface fine grinding equipment

Abstract

The utility model relates to the technical field of machining equipment, in particular to friction plate surface fine grinding equipment which comprises an outer shell. A supporting table is installed in the outer shell, supports are arranged at the front end and the rear end of the upper surface of the supporting table, a sliding table and a cross-shaped sliding table are installed on the two supports, a grinding motor is installed on a sliding block of the cross-shaped sliding table, a carborundum brazing grinding head is installed on an output shaft of the grinding motor, and a pressing air cylinder is installed on a moving block of the sliding table. A lifting frame is installed at the telescopic end of the pressing air cylinder, two pressing wheels are installed on the lower surface of the lifting frame and symmetrically arranged at the front end and the rear end of the lower surface of the lifting frame, and a grinding groove is formed in the upper surface of the lifting frame and arranged between the two pressing wheels. The lifting frame is driven by the pressing air cylinder, the two symmetrically-distributed pressing wheels evenly apply pressure to the front end and the rear end of the friction plate, and the problems of hole periphery pressing and edge tilting caused by traditional screw fixing are effectively solved.

Description

Technical Field

[0001] This application relates to the field of machining equipment technology, specifically to a fine grinding equipment for friction pad surfaces. Background Technology

[0002] In the manufacturing process of couplings, friction plates, as the core component for torque transmission, directly affect the stability of equipment calibration due to their geometric accuracy and surface characteristics. Currently, the flatness of friction plates on the market is poor, and the thickness difference cannot be guaranteed to be within 0.1 mm. Since a layer of graphite on the surface of the friction plate affects the friction performance and needs to be removed, the surface of the friction plate needs to be ground.

[0003] Currently, manual and automatic grinding methods are commonly used to polish the surface of friction pads. Manual methods can only remove the graphite layer on the surface of the friction pads and cannot improve the thickness difference of the friction pads.

[0004] Existing automatic polishing methods require the use of a vertical polishing machine. The working end of the vertical polishing machine is equipped with a polishing head, and its operation requires the following: Figure 7 As shown, the friction plate is installed on the base. The groove on the base restricts the lateral movement of the friction plate. A special flat-head screw is used to fix the friction plate to the base through the hole on the friction plate to prevent it from tilting. Then, a vertical grinder is started to grind the friction plate. However, the thickness difference on the torque limiter side of the processed friction plate is 0.09 mm, and the thickness difference on the pressure plate side is 0.16 mm. This is mainly reflected in the thickness around the screw holes, which is thicker than the area further away from the screw holes. The calibration process requires a larger tightening torque compared to normal products, and the calibration process cannot achieve the expected results.

[0005] Therefore, during the automatic grinding process of friction plates, using only the base to process the friction plates cannot effectively control the thickness difference of the friction plates, resulting in poor clamping effect. Only the area around the screw holes can be clamped, while the area away from the screw holes is raised, leading to a large amount of processing, thinner friction plates after processing, and poor calibration effect. Utility Model Content

[0006] This application provides a fine grinding device for friction pad surfaces, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: a fine grinding device for friction pad surfaces, comprising a housing; a support platform is installed inside the housing, and brackets are provided at both the front and rear ends of the upper surface of the support platform. A slide table and a cross slide table are installed on each of the two brackets. A grinding motor is installed on the slider of the cross slide table, and a diamond brazed grinding head is installed on the output shaft of the grinding motor. A clamping cylinder is installed on the moving block of the slide table, and a lifting frame is installed at the telescopic end of the clamping cylinder. Two pressure rollers are installed on the lower surface of the lifting frame, and the two pressure rollers are symmetrically arranged at the front and rear ends of the lower surface of the lifting frame. A grinding groove is provided on the upper surface of the lifting frame, and the grinding groove is located between the two pressure rollers.

[0008] A main shaft is rotatably connected to the middle of the upper surface of the support platform. A rotary table is mounted on the upper surface of the main shaft. A friction plate positioning groove that fits the shape of the friction plate to be processed is mounted on the upper surface of the rotary table. A power mechanism for controlling the rotation of the main shaft is provided on the support platform.

[0009] Preferably, a control box is provided at the lower interior of the outer shell, and a front hatch that can be flipped open is provided at the upper front side of the outer shell, with an observation window provided on the front hatch.

[0010] Preferably, there are two slides and two cross slides, and the two slides and the two cross slides are arranged on the left and right sides above the support platform.

[0011] Preferably, a tool setting device is provided on the upper surface of the support platform near the grinding motor.

[0012] Preferably, the power mechanism includes a motor and a reducer mounted on the upper surface of the support platform. The output shaft of the motor is connected to the input shaft of the reducer via a coupling, and the output shaft of the reducer is connected to the main shaft via a coupling.

[0013] Preferably, the upper surface of the support platform is provided with a dust cover, the motor and reducer are both located inside the dust cover, and the end of the main shaft passes through the dust cover.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] 1. This application uses a pressing cylinder to drive the lifting frame, so that two symmetrically distributed pressure rollers apply pressure evenly to the front and rear ends of the friction plate, which effectively solves the problem of "peripheral pressing and edge lifting" caused by traditional screw fixing, avoids local deformation during processing, and ensures that the friction plate fits the entire plane.

[0016] 2. The pressure rollers adaptively adjust the pressure with the lifting frame, maintaining a uniform clamping force throughout the grinding process, reducing thickness deviation caused by vibration or changes in processing force, and keeping the thickness difference stably controlled within 0.1 mm.

[0017] 3. The friction plate positioning groove set on the rotary table is precisely fitted with the workpiece shape. Combined with the rotation function of the spindle drive, the circumferential positioning of the friction plate is achieved without offset, reducing lateral movement error. The grinding motor achieves precise horizontal and vertical displacement through the cross slide. Combined with the vertical movement of the slide, the spatial position of the diamond brazed grinding head can be flexibly adjusted to meet the grinding needs of different thicknesses and surface curvatures.

[0018] 4. A tool setter is installed on the support platform to quickly calibrate the initial position of the grinding head, reduce manual tool setting errors, and improve processing accuracy and efficiency; the front door is equipped with an observation window to facilitate real-time monitoring of the processing status. Through uniform clamping and multi-directional precision grinding, the thickness difference around the hole and the edge is significantly reduced, and the thickness difference between the torque limiter side and the pressure plate side is nearly consistent, solving the problem of abnormal calibration torque. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this application;

[0020] Figure 2 This is a schematic diagram of the internal structure of the outer shell;

[0021] Figure 3 for Figure 2 The main view;

[0022] Figure 4 for Figure 2 The left view;

[0023] Figure 5 for Figure 4 Schematic diagram of the cross-section at point AA;

[0024] Figure 6 for Figure 2 Top view;

[0025] Figure 7 The screw fixing method for friction plates when processing friction plates using existing technology.

[0026] In the diagram: 1 Outer shell, 2 Front hatch, 3 Observation window, 4 Control box, 5 Slide table, 6 Bracket, 7 Cross slide table, 8 Dust cover, 9 Support platform, 10 Rotary table, 11 Main spindle, 12 Reducer, 13 Motor, 14 Grinding motor, 15 Diamond brazed grinding head, 16 Pressure roller, 17 Lifting frame, 18 Clamping cylinder, 19 Tool setter. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating directional or positional relationships, they are based on the appendix. Figure 3 The orientations or positional relationships shown are for the convenience of describing this application and simplifying the description only, and are not intended to indicate or imply that the device or element 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 application. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0029] Please see Figure 1-6 This application provides the following technical solution: a fine grinding device for friction pad surfaces, comprising a housing 1; a support platform 9 is installed inside the housing 1, and brackets 6 are provided at both the front and rear ends of the upper surface of the support platform 9. A slide table 5 and a cross slide table 7 are installed on each of the two brackets 6. A grinding motor 14 is installed on the slider of the cross slide table 7, and a diamond brazed grinding head 15 is installed on the output shaft of the grinding motor 14. A clamping cylinder 18 is installed on the moving block of the slide table 5, and a lifting frame 17 is installed at the telescopic end of the clamping cylinder 18. A pressure roller 16 is installed on the lower surface of the lifting frame 17. There are two pressure rollers 16, which are symmetrically arranged at the front and rear ends of the lower surface of the lifting frame 17. A grinding groove is provided on the upper surface of the lifting frame 17, and the grinding groove is located between the two pressure rollers 16.

[0030] Specifically, two brackets 6 are symmetrically arranged at the front and rear ends of the support platform 9, and two pressure rollers 16 are symmetrically distributed. They can simultaneously apply uniform pressure to the front and rear ends of the friction plate, avoiding local warping caused by single-point pressing and ensuring a flat processing surface. The pressing cylinder 18 drives the pressure rollers 16 to adaptively adjust the pressure through the lifting frame 17. In conjunction with the grinding action of the diamond brazed grinding head 15, the thickness deviation caused by processing vibration is reduced.

[0031] A main shaft 11 is rotatably connected to the middle of the upper surface of the support platform 9. A rotary table 10 is mounted on the upper surface of the main shaft 11. A friction plate positioning groove that fits the shape of the friction plate to be processed is mounted on the upper surface of the rotary table 10. A power mechanism for controlling the rotation of the main shaft 11 is provided on the support platform 9.

[0032] Specifically, the friction plate positioning groove fits the workpiece shape, and combined with the rotation of the rotary table 10 driven by the spindle 11, the friction plate is uniformly ground in the circumference, improving the flatness control accuracy.

[0033] Furthermore, a control box 4 is provided at the lower end of the interior of the outer shell 1, and a front hatch 2 that can be opened by flipping is provided at the upper end of the front side of the outer shell 1. An observation window 3 is provided on the front hatch 2.

[0034] Specifically, the design of the front hatch 2 facilitates the placement and removal of the friction pads.

[0035] Furthermore, there are two slides 5 and two cross slides 7, and the two slides 5 and the two cross slides 7 are arranged on the left and right sides above the support platform 9.

[0036] Specifically, slides 5 and cross slides 7 are symmetrically arranged on the left and right sides, and two grinding units are independently controlled, which improves the processing efficiency of the friction plates.

[0037] Furthermore, a tool setting device 19 is provided on the upper surface of the support platform 9 near the grinding motor 14.

[0038] Specifically, the tool setter 19 is used for re-setting the tool after a tool change or when the tool is worn, eliminating the need for manual tool setting, preventing errors, and improving efficiency.

[0039] Furthermore, the power mechanism includes a motor 13 and a reducer 12 mounted on the upper surface of the support platform 9. The output shaft of the motor 13 is connected to the input shaft of the reducer 12 via a coupling, and the output shaft of the reducer 12 is connected to the main shaft 11 via a coupling.

[0040] Specifically, the motor 13 and the reducer 12 work together to provide a stable speed, driving the spindle 11 to rotate at a uniform speed, avoiding uneven grinding thickness caused by speed fluctuations, and improving processing stability.

[0041] Furthermore, the upper surface of the support platform 9 is provided with a dust cover 8, and the motor 13 and the reducer 12 are both located inside the dust cover 8. The end of the main shaft 11 passes through the dust cover 8.

[0042] Specifically, the dust cover 8 isolates wear debris from entering key components such as the motor 13 and reducer 12, extending the service life of the equipment and reducing maintenance costs.

[0043] In use: Place the friction plate that needs to be ground into the friction plate positioning groove on the upper surface of the rotary table 10, close the front door 2, start the equipment, the slide table 5 moves the pressure roller 16 to above the friction plate, start the left and right clamping cylinders 18, drive the lifting frame 17 to descend, so that the two sets of pressure rollers 16 evenly press the left and right ends of the friction plate.

[0044] The motor 13 of the power mechanism drives the main shaft 11 to rotate through the reducer 12, which in turn drives the rotary table 10 to rotate at a constant speed.

[0045] The cross slide 7 first calibrates the initial position of the diamond brazed grinding head 15 in conjunction with the tool setter 19. Then, the X-axis of the cross slide 7 moves slowly while the Y-axis is locked, so that the diamond brazed grinding head 15 moves to the grinding groove on the upper surface of the lifting frame 17. The Y-axis of the cross slide 7 moves slowly, and the diamond brazed grinding head 15 passes through the grinding groove and presses onto the friction plate to be processed. The grinding motor 14 drives the diamond brazed grinding head 15 to grind the friction plate.

[0046] The calibration described in this application involves applying a specific tightening torque to the torque limiter and testing its slip torque (i.e., the critical torque at which the friction plate begins to slip) under different loads to verify whether its performance meets the standards. The purpose is to ensure that the flatness, thickness difference, and surface roughness of the processed friction plate meet the requirements, and to avoid unstable torque transmission due to uneven contact between the friction plates.

[0047] It is worth noting that, in this embodiment, the motor 13 is a Huichuan MS1H1-75B30CB-T331Z servo motor with a frame size of 80, a power of 750W, a rated torque of 2.39 N·m, a rated speed of 3000rpm, a voltage of AC220V, an 18-bit multi-turn encoder, and no brake. The horizontal travel of the cross slide 7 is 350°, and the vertical travel is 100°. The grinding motor 14 is mounted on the vertical slide, which is mounted on the horizontal slide. The grinding motor 14 is an air-cooled electric spindle, specifically a Zhenyu / FQD square air-cooled electric spindle with a power of 1.5KW. The ER20 is a flanged type, with a voltage of 220V. The tool setter 19 is an automatic tool setter with an accuracy of 0.001mm. The control box 4 contains a PLC. The input terminals of the PLC are electrically connected to the output terminals of the external power supply. The output terminals of the PLC are electrically connected to the input terminals of the slide table 5, the cross slide table 7, the motor 13, the grinding motor 14, the clamping cylinder 18, and the tool setter 19, respectively. The PLC controls the operation of the slide table 5, the cross slide table 7, the motor 13, the grinding motor 14, the clamping cylinder 18, and the tool setter 19 using methods commonly used in existing technologies.

[0048] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fine grinding device for friction pad surfaces, characterized in that: Includes an outer shell (1); a support platform (9) is installed inside the outer shell (1), and brackets (6) are provided at both ends of the upper surface of the support platform (9). A slide table (5) and a cross slide table (7) are installed on both brackets (6). A grinding motor (14) is installed on the slider of the cross slide table (7). A diamond brazed grinding head (15) is installed on the output shaft of the grinding motor (14). A pressing cylinder (18) is installed on the moving block of the slide table (5). A lifting frame (17) is installed on the telescopic end of the pressing cylinder (18). A pressure wheel (16) is installed on the lower surface of the lifting frame (17). There are two pressure wheels (16). The two pressure wheels (16) are symmetrically arranged at both ends of the lower surface of the lifting frame (17). A grinding groove is provided on the upper surface of the lifting frame (17). The grinding groove is located between the two pressure wheels (16). A main shaft (11) is rotatably connected to the middle of the upper surface of the support platform (9). A rotary table (10) is installed on the upper surface of the main shaft (11). A friction plate positioning groove that fits the shape of the friction plate to be processed is installed on the upper surface of the rotary table (10). A power mechanism for controlling the rotation of the main shaft (11) is provided on the support platform (9).

2. The fine grinding equipment for friction pad surfaces according to claim 1, characterized in that: The lower interior of the outer shell (1) is provided with a control box (4), and the upper front side of the outer shell (1) is provided with a front hatch (2) that can be opened by flipping, and an observation window (3) is provided on the front hatch (2).

3. The fine grinding equipment for friction pad surfaces according to claim 1, characterized in that: The number of the slides (5) and the cross slides (7) are both two, and the two slides (5) and the two cross slides (7) are both arranged on the left and right sides above the support platform (9).

4. The fine grinding equipment for friction pads according to claim 1, characterized in that: The upper surface of the support platform (9) is equipped with a tool setting device (19) near the grinding motor (14).

5. The fine grinding equipment for friction pad surfaces according to claim 1, characterized in that: The power mechanism includes a motor (13) and a reducer (12) mounted on the upper surface of the support platform (9). The output shaft of the motor (13) is connected to the input shaft of the reducer (12) through a coupling, and the output shaft of the reducer (12) is connected to the main shaft (11) through a coupling.

6. The fine grinding equipment for friction pads according to claim 5, characterized in that: The upper surface of the support platform (9) is provided with a dust cover (8), and the motor (13) and reducer (12) are both located inside the dust cover (8). The end of the main shaft (11) passes through the dust cover (8).

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