Brittle material appearance grinding and polishing device

Abstract

The invention provides a brittle material appearance grinding and polishing device which comprises a machine frame, a grinding device and a polishing device. The clamping module is used for clamping and fixing the aluminum bar; the number of the clamping modules is two. The two clamping modules are installed on the upper portion of the operation table in parallel in a spaced mode. The number of the polishing modules is two; the two polishing modules correspond to the two clamping modules respectively and are installed on the operation table. The clamping modules and the polishing modules are arranged at intervals; the polishing module comprises a driving assembly and a grinding disc. The grinding disc repairing module is located above the grinding disc, fixedly connected with the rack and used for grinding and repairing the grinding disc; a control cabinet; according to the shape grinding and polishing device for the fragile materials, clamping, grinding and polishing and grinding disc repairing of the materials are achieved through the coordination effect of the multiple modules.

Description

Technical Field

[0001] The invention relates to the technical field of grinding and polishing devices, in particular to a brittle material shape grinding and polishing device. Background Art

[0002] In the field of precision machining, brittle materials (such as ceramics, glass, etc.) often face problems such as easy breakage and low processing efficiency during grinding and polishing due to their high hardness and brittleness. The usual grinding and polishing operation needs to ensure that the material is fixed firmly and evenly stressed to avoid cracks. However, traditional brittle material grinding and polishing devices mostly use manual or simple mechanical assistance to fix and polish, which mainly has the following problems:

[0003] Fixing problem of aluminum bars: In common devices, brittle materials need to be installed on aluminum bars, and the fixing of aluminum bars to the workbench is usually achieved by bolts. Due to the frequent installation and disassembly of aluminum bars, the bolt fixing method makes the disassembly and assembly process cumbersome and time-consuming, affecting production efficiency. In addition, frequent disassembly and assembly will also cause wear on equipment and bolts, thereby affecting positioning accuracy and further affecting grinding and polishing quality.

[0004] Grinding disc dressing problem: Grinding discs will wear unevenly after long-term grinding and polishing, affecting the uniformity and accuracy of grinding and polishing. Traditional dressing methods usually require manual grinding and repair using a repairing tool, which not only takes a long time to repair, but also makes it difficult to ensure the consistency of the dressing effect. Manual dressing relies on the experience of the operator and is prone to errors, resulting in poor surface quality after processing and increasing the time cost of rework and debugging.

[0005] In order to solve these problems, some new grinding and polishing equipment in the industry have begun to introduce automation technology to simplify the fixing operation and realize the automatic dressing of the grinding disc. However, it is found in the application that many equipment still require a lot of manual intervention and the operation process is complicated. Especially for the disc repair operation during the grinding and polishing process, the reliability and processing effect of the automated equipment still need to be improved. Therefore, the development of a grinding and polishing device that can effectively fix the aluminum row and automatically dress the grinding disc has become an urgent need in the industry. Summary of the invention

[0006] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a brittle material profile grinding and polishing device, which realizes the clamping, grinding and polishing of the material and the repair of the grinding disc through the coordinated action of multiple modules.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A brittle material profile grinding and polishing device, comprising:

[0009] The frame has an operating table fixed in the middle;

[0010] The clamping module is used to clamp and fix the aluminum bar; there are two clamping modules; the two clamping modules are installed in parallel and at intervals on the upper part of the operating table;

[0011] There are two polishing modules; the two polishing modules correspond to two clamping modules respectively and are installed on the operating table; the clamping module and the polishing module are arranged at intervals; the polishing module includes a driving component and a grinding disc; the grinding disc is arranged on the upper part of the operating table; the driving component is placed under the operating table, the bottom is fixedly connected to the frame, and the top is connected to the grinding disc by transmission; the driving component is used to drive the grinding disc to move;

[0012] The repairing module is located above the grinding disc and is fixedly connected to the frame for grinding and repairing the grinding disc;

[0013] The control cabinet is fixed in the frame and is used to control the operation of the clamping module, polishing module and repairing module.

[0014] Preferably, the clamping module includes a crossbeam, a locking mounting plate, a locking cylinder, a lower locking block, a vertical frame and a flip motor; the vertical frame is mounted on the operating table; the flip motor is fixed on the vertical frame; the crossbeam is horizontally spaced above the operating table, and the end portion is connected to the output shaft of the flip motor; a positioning groove is provided on the crossbeam, and an upper locking block is installed in the positioning groove; an upper locking groove adapted to the upper locking block is provided on the upper part of the aluminum bar, and one end of the upper locking block is clamped in the upper locking groove; the locking cylinder is fixed on the crossbeam; the locking mounting plate is fixed on the piston rod of the locking cylinder; the lower locking block is fixed on the locking mounting plate; a lower locking groove adapted to the lower locking block is provided on the lower part of the aluminum bar, and one end of the lower locking block is clamped in the lower locking groove.

[0015] Preferably, the driving assembly includes a driving motor, a driving wheel, a driven wheel, a positioning frame and a spline shaft; the driving motor and the positioning frame are fixed on the frame; the spline shaft is vertically arranged inside the positioning frame, and the upper part is rotatably mounted on the operating table; the driving wheel is mounted on the output shaft of the driving motor, and the driven wheel is mounted on the rotating part on the spline shaft, and the driving wheel and the driven wheel are connected by belt drive; the grinding disc is fixed on the top of the spline shaft.

[0016] Preferably, the driving assembly also includes a lifting unit; the lifting unit includes a lifting electric cylinder, an upper lifting plate, a lower lifting plate and a first guide rod; the first guide rod is slidably installed on the positioning frame, the upper end is fixedly connected to the upper lifting plate, and the lower end is fixedly connected to the lower lifting plate; the piston rod of the lifting electric cylinder is fixedly connected to the lower end surface of the lower lifting plate; the lower end of the spline shaft is rotatably installed on the lower lifting plate.

[0017] Preferably, the positioning frame includes an upper positioning plate, a lower positioning plate and a second guide rod; the lower positioning plate is located below the lower lifting plate, and the upper positioning plate is located between the upper lifting plate and the lower lifting plate; the upper end of the second guide rod is fixedly connected to the upper positioning plate, and the lower end is fixedly connected to the lower positioning plate; a second guide hole adapted to the second guide rod is provided on the lower lifting plate, and the second guide rod can slide through the second guide hole; a first guide hole adapted to the first guide rod is provided on the upper positioning plate, and the first guide rod can slide through the first guide hole.

[0018] Preferably, the clamping module also includes a walking unit; the walking unit includes a guide rail, a slider, a rack, a gear and a walking motor; the guide rail and the rack are fixed on the operating table; the gear and the rack are meshed and transmitted; the slider is slidably mounted on the guide rail; the stand and the walking motor are fixed on the slider; the gear and the output shaft of the walking motor are connected in a transmission manner.

[0019] Preferably, the disc repairing module comprises a linear motion module, a disc repairing electric cylinder and a grinding head; the linear motion module is fixed on the frame; the disc repairing electric cylinder is installed on the linear motion module; and the grinding head is fixed on the piston rod of the disc repairing electric cylinder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Convenient aluminum bar fixing and disassembly: The locking cylinder in the clamping module controls the locking and loosening of the aluminum bar, replacing the traditional bolt fixing method. The locking cylinder not only realizes rapid clamping and release, making the installation and disassembly of the aluminum bar easier, but also shortens the assembly time and improves production efficiency. This structure can maintain stable positioning during the frequent grinding and polishing of multiple workpieces, ensuring processing accuracy while extending the life of the equipment.

[0022] Automated grinding and polishing process: The device is designed with a travel unit, which enables the clamping module to move along the guide rail, thereby driving the workpiece fixed on the aluminum row to move evenly on the grinding disc. The movement process is driven by the travel motor, which avoids the error of manual operation and improves the uniformity of grinding and polishing. In addition, the lifting unit in the polishing module can control the up and down movement of the grinding disc to keep it in the optimal contact state with the workpiece, further improving the grinding and polishing quality.

[0023] Efficient automatic grinding disc dressing: The present invention is provided with a disc repair module, which drives the grinding head through the disc repair electric cylinder to achieve automatic dressing of the disc surface. The rotating motion of the grinding disc contacts the grinding head of the disc repair module, and the unevenly worn parts on the grinding disc are effectively repaired, ensuring the flatness and uniformity of the disc surface and improving the consistency of the grinding and polishing effect. The automated dressing method not only avoids the error of manual dressing, but also greatly shortens the dressing time and prolongs the service life of the grinding disc.

[0024] Reduce manual operation and improve processing efficiency: The automated design of the present invention significantly reduces the number of steps that require manual intervention, especially in the aluminum bar fixing, grinding and polishing adjustment, and grinding disc dressing process, which reduces the difficulty of operation. The automated operation of each module not only improves work efficiency, but also reduces human errors in processing, meets the needs of high-precision, mass production, and is suitable for grinding and polishing processing occasions that require strict requirements for brittle materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the clamping module in the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the driving component in the present invention;

[0029] Figure 5 It is a structural schematic diagram of the disk repair module in the present invention.

[0030] in:

[0031] 1. Frame; 2. Travel unit; 21. Guide rail; 3. Lifting unit; 4. Driving assembly; 41. Driven wheel; 42. Driving motor; 43. Driving wheel; 44. Lower lifting plate; 45. Lifting electric cylinder; 46. Lower positioning plate; 47. Spline shaft; 48. Second guide rod; 49. First guide rod; 410. Upper lifting plate; 5. Control cabinet; 6. Waterproof groove; 7. Grinding disc; 8. Repairing disc module; 81. Linear motion module; 82. Grinding head; 83. Repairing disc electric cylinder; 9. Clamping module; 91. Crossbeam; 92. Stand; 93. Slider; 94. Traveling motor; 95. Flipping motor; 10. Aluminum row. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 5 As shown, a brittle material profile grinding and polishing device comprises:

[0034] Frame 1, with an operating table fixedly arranged in the middle;

[0035] The clamping module 9 is used to clamp and fix the aluminum bar 10; there are two clamping modules 9; the two clamping modules 9 are installed in parallel and at intervals on the upper part of the operating table;

[0036] There are two polishing modules; the two polishing modules correspond to two clamping modules 9 respectively and are installed on the operating table; the clamping module 9 and the polishing module are arranged at intervals; the polishing module includes a driving component 4 and a grinding disc 7; the grinding disc 7 is arranged on the upper part of the operating table; the driving component 4 is placed under the operating table, the bottom is fixedly connected to the frame 1, and the top is connected to the grinding disc 7 by transmission; the driving component 4 is used to drive the grinding disc 7 to move, so as to perform precision grinding and polishing on the surface of the aluminum bar 10;

[0037] The repairing module 8 is located above the grinding disc 7 and is fixedly connected to the frame 1, and is used to repair the grinding disc 7 to maintain the flatness of the grinding disc 7 and the continuous consistency of the grinding and polishing effect;

[0038] The control cabinet 5 is fixed in the frame 1 and is used to control the operation of the clamping module 9, the polishing module and the repairing module 8 to ensure the coordinated operation of each component;

[0039] In this embodiment, the clamping module 9 includes a crossbeam 91, an aluminum row 10, a locking mounting plate, a locking cylinder, a lower locking block, a stand 92 and a flip motor 95; the stand 92 is mounted on the operating table to provide a firm support; the flip motor 95 is fixed on the stand 92, and drives the crossbeam 91 to adjust its angle through its output shaft so as to adjust the position of the aluminum row 10 during the grinding and polishing process; the crossbeam 91 is horizontally spaced above the operating table, and the end is connected to the output shaft of the flip motor 95; a positioning groove is provided on the crossbeam 91, and an upper locking block is installed in the positioning groove; An upper locking groove matched with an upper locking block is provided on the upper part of the row 10, and one end of the upper locking block is clamped in the upper locking groove; the locking cylinder is fixed on the crossbeam 91, and the clamping and loosening of the aluminum row 10 are achieved by controlling the telescopic action of its piston rod; the locking mounting plate is fixed on the piston rod of the locking cylinder; the lower locking block is fixed on the locking mounting plate; a lower locking groove matched with a lower locking block is provided on the lower part of the aluminum row 10, and one end of the lower locking block is clamped in the lower locking groove, thereby ensuring the stability of the aluminum row 10 in the clamping module 9 to prevent displacement during processing; this is the prior art.

[0040] In this embodiment, the driving assembly 4 includes a driving motor 42, a driving wheel 43, a driven wheel 41, a positioning frame and a spline shaft 47; the driving motor 42 and the positioning frame are fixed on the frame 1 to provide stable support for the entire polishing process; the spline shaft 47 is vertically arranged inside the positioning frame, and the upper part is rotatably installed on the operating table; the driving wheel 43 is installed on the output shaft of the driving motor 42, and the driven wheel 41 is installed on the rotating part on the spline shaft 47. The driving wheel 43 and the driven wheel 41 are connected by a belt drive to achieve accurate transmission of the grinding disc 7; the grinding disc 7 is fixed on the top of the spline shaft 47, so that the rotation of the grinding disc 7 is controlled;

[0041] In this embodiment, the driving assembly 4 also includes a lifting unit 3; the lifting unit 3 includes a lifting electric cylinder 45, an upper lifting plate 410, a lower lifting plate 44 and a first guide rod 49; the first guide rod 49 is slidably mounted on the positioning frame, the upper end of which is fixedly connected to the upper lifting plate 410, and the lower end of which is fixedly connected to the lower lifting plate 44; the piston rod of the lifting electric cylinder 45 is fixedly connected to the lower end surface of the lower lifting plate 44, and the height of the grinding disc 7 is adjusted by controlling the extension and contraction of the lifting electric cylinder 45 to meet different grinding and polishing requirements; the lower end of the spline shaft 47 is rotatably mounted on the lower lifting plate 44 to provide stable support for the grinding disc 7 during the lifting process;

[0042] In this embodiment, the positioning frame includes an upper positioning plate, a lower positioning plate 46 and a second guide rod 48; the lower positioning plate 46 is located below the lower lifting plate 44, and the upper positioning plate is located between the upper lifting plate 410 and the lower lifting plate 44; the upper end of the second guide rod 48 is fixedly connected to the upper positioning plate, and the lower end is fixedly connected to the lower positioning plate 46 to ensure the guiding effect during the lifting process; the lower lifting plate 44 is provided with a second guide hole adapted to the second guide rod 48, and the second guide rod 48 can be slidably penetrated through the second guide hole to enhance the positioning accuracy; the upper positioning plate is provided with a first guide hole adapted to the first guide rod 49, and the first guide rod 49 can be slidably penetrated through the first guide hole to ensure the stability and guiding accuracy of the overall lifting assembly;

[0043] In this embodiment, the clamping module 9 also includes a walking unit 2; the walking unit 2 includes a guide rail 21, a slider 93, a rack, a gear and a walking motor 94; the guide rail 21 and the rack are fixed on the operating table to provide a walking path for the clamping module 9; the gear and the rack are meshed and driven, and the travel motor 94 drives the rotation of the gear to achieve smooth movement of the slider 93 along the guide rail 21; the slider 93 is slidably mounted on the guide rail 21 to adjust the positioning of the clamping module 9 to adapt to materials of different sizes; the stand 92 and the travel motor 94 are fixed on the slider 93, and the output shaft of the travel motor 94 is connected to the gear transmission, and the clamping module 9 is driven to move on the operating table through the cooperation of the gear and the rack, so as to complete the rapid switching of the grinding and polishing parts;

[0044] In this embodiment, the repairing module 8 includes a linear motion module 81, a repairing electric cylinder 83 and a grinding head 82; the linear motion module 81 is fixed on the frame 1, providing a moving path for the repairing electric cylinder 83; the repairing electric cylinder 83 is installed on the linear motion module 81, and the position of the repairing electric cylinder 83 is controlled to achieve the repair of different areas of the grinding disc 7; the grinding head 82 is fixed on the piston rod of the repairing electric cylinder 83, directly acts on the surface of the grinding disc 7, and ensures its flatness and uniformity of grinding and polishing effect by repairing the grinding disc 7.

[0045] In this embodiment, a waterproof groove 6 is fixedly provided on the operating table. The waterproof groove 6 is located below the grinding disc 7. A drainage pipe is provided on the waterproof groove 6 for receiving the grinding fluid to prevent the grinding fluid from damaging the equipment.

[0046] Working principle:

[0047] The main working principle of this brittle material shape grinding and polishing device is to achieve precise grinding and polishing of the material on the aluminum row 10 through the coordinated action of the clamping module 9, the polishing module, and the repairing module 8. The clamping module 9 is responsible for fixing the aluminum row 10 on the operating table, and drives the clamping module 9 to move through the walking unit 2 to ensure the adjustment of the grinding and polishing position; the driving component 4 in the polishing module grinds and polishes the aluminum row 10 through the rotation of the grinding disc 7, and the grinding disc 7 can move up and down through the control of the lifting unit 3 to meet different grinding and polishing requirements. The repairing module 8 is started after the grinding disc 7 is worn, and the surface of the grinding disc 7 is trimmed to ensure the flatness of the grinding disc 7 and the consistency of the grinding and polishing effect. In addition, the control cabinet 5 is responsible for the control of the entire device, so that each module executes according to the preset program.

[0048] Directions:

[0049] Preparation:

[0050] The aluminum row 10 material to be polished is placed in the clamping module 9 on the operating table, and the relative position of the aluminum row 10 and the grinding disc 7 is adjusted so that the area to be processed is within the polishing range of the grinding disc 7.

[0051] Check the settings of the control cabinet 5 to ensure that the clamping module 9, the polishing module and the repairing module 8 are in the initial standby state.

[0052] Clamping and positioning:

[0053] Start the clamping module 9, and control the upper and lower locking blocks through the locking cylinder to clamp the aluminum row 10 and fix it firmly on the operating table.

[0054] The travel motor 94 in the travel unit 2 drives the clamping module 9 to slide along the guide rail 21, and adjusts the position of the aluminum row 10 according to the grinding and polishing requirements to ensure the precise positioning of the grinding and polishing operation area.

[0055] Grinding and polishing operations:

[0056] The driving motor 42 in the polishing module is started to drive the grinding disc 7 to rotate through the belt transmission.

[0057] According to the needs, the extension and contraction of the lifting electric cylinder 45 is adjusted to make the grinding disc 7 rise or fall to a position in contact with the surface of the aluminum row 10.

[0058] The grinding disc 7 starts to rotate, and the surface of the aluminum row 10 is evenly ground and polished; the lifting electric cylinder 45 can adjust the height of the grinding disc 7 in time to meet the needs of different grinding and polishing depths.

[0059] Grinding disc 7 dressing:

[0060] When the grinding disc 7 is worn or the grinding and polishing accuracy needs to be maintained, the disc repairing module 8 is started.

[0061] The piston rod of the repairing electric cylinder 83 pushes the grinding head 82 to make it contact the surface of the grinding disc 7.

[0062] The grinding head 82 moves along the path set by the linear motion module 81 to finely trim the surface of the grinding disc 7 to ensure the flatness of the grinding disc 7 .

[0063] Complete the assignment:

[0064] After the grinding and polishing operation is completed, the control cabinet 5 automatically performs the loosening action of the clamping module 9 and releases the aluminum row 10 by locking the cylinder.

[0065] Take out the aluminum row 10 material that has been ground and polished, and complete the entire operation process.

[0066] The device realizes the automated operations of fixing, grinding and polishing, and repairing the aluminum row 10 through a modular design, thereby improving processing efficiency and finished product quality.

Claims

1. A brittle material profile grinding and polishing device, characterized in that: include: A frame (1) having an operating table fixedly arranged in the middle; A clamping module (9) for clamping and fixing the aluminum bar (10); There are two clamping modules (9); the two clamping modules (9) are installed in parallel and at intervals on the upper part of the operating table; The polishing module is provided with two; the two polishing modules correspond to two clamping modules (9) respectively and are installed on the operating table; the clamping module (9) and the polishing module are arranged at intervals; the polishing module comprises a driving component (4) and a grinding disc (7); the grinding disc (7) is arranged on the upper part of the operating table; the driving component (4) is placed under the operating table, the bottom is fixedly connected to the frame (1), and the top is drivingly connected to the grinding disc (7); the driving component (4) is used to drive the grinding disc (7) to move; A repairing module (8) is located above the grinding disc (7) and is fixedly connected to the frame (1) and is used for grinding and repairing the grinding disc (7); The control cabinet (5) is fixed in the frame (1) and is used to control the operation of the clamping module (9), the polishing module and the repairing module (8).

2. A brittle material profile grinding and polishing device as claimed in claim 1, characterized in that: The clamping module (9) comprises a crossbeam (91), a locking mounting plate, a locking cylinder, a lower locking block, a stand (92) and a flip motor (95); the stand (92) is mounted on the operating table; the flip motor (95) is fixed on the stand (92); the crossbeam (91) is horizontally arranged above the operating table, and its end is connected to the output shaft of the flip motor (95); a positioning groove is arranged on the crossbeam (91), and an upper locking block is installed in the positioning groove; an upper locking groove matching the upper locking block is arranged on the upper part of the aluminum bar (10), and one end of the upper locking block is clamped in the upper locking groove; the locking cylinder is fixed on the crossbeam (91); the locking mounting plate is fixed on the piston rod of the locking cylinder; the lower locking block is fixed on the locking mounting plate; a lower locking groove matching the lower locking block is arranged on the lower part of the aluminum bar (10), and one end of the lower locking block is clamped in the lower locking groove.

3. A brittle material profile grinding and polishing device as claimed in claim 1, characterized in that: The driving assembly (4) comprises a driving motor (42), a driving wheel (43), a driven wheel (41), a positioning frame and a spline shaft (47); the driving motor (42) and the positioning frame are fixed on the frame (1); the spline shaft (47) is vertically arranged inside the positioning frame, and the upper part is rotatably mounted on the operating table; the driving wheel (43) is mounted on the output shaft of the driving motor (42), the driven wheel (41) is mounted on the rotating part on the spline shaft (47), and the driving wheel (43) and the driven wheel (41) are connected by belt transmission; the grinding disc (7) is fixed on the top of the spline shaft (47).

4. A brittle material profile grinding and polishing device as claimed in claim 3, characterized in that: The driving assembly (4) also includes a lifting unit (3); the lifting unit (3) includes a lifting electric cylinder (45), an upper lifting plate (410), a lower lifting plate (44) and a first guide rod (49); the first guide rod (49) is slidably mounted on the positioning frame, with the upper end fixedly connected to the upper lifting plate (410) and the lower end fixedly connected to the lower lifting plate (44); the piston rod of the lifting electric cylinder (45) is fixedly connected to the lower end surface of the lower lifting plate (44); the lower end of the spline shaft (47) is rotatably mounted on the lower lifting plate (44).

5. A brittle material profile grinding and polishing device as claimed in claim 4, characterized in that: The positioning frame includes an upper positioning plate, a lower positioning plate (46) and a second guide rod (48); the lower positioning plate (46) is located below the lower lifting plate (44), and the upper positioning plate is located between the upper lifting plate (410) and the lower lifting plate (44); the upper end of the second guide rod (48) is fixedly connected to the upper positioning plate, and the lower end is fixedly connected to the lower positioning plate (46); the lower lifting plate (44) is provided with a second guide hole adapted to the second guide rod (48), and the second guide rod (48) can be slidably passed through the second guide hole; the upper positioning plate is provided with a first guide hole adapted to the first guide rod (49), and the first guide rod (49) can be slidably passed through the first guide hole.

6. A brittle material profile grinding and polishing device as claimed in claim 2, characterized in that: The clamping module (9) further comprises a travel unit (2); the travel unit (2) comprises a guide rail (21), a slider (93), a rack, a gear and a travel motor (94); the guide rail (21) and the rack are fixed on the operating table; the gear and the rack are meshed and transmitted; the slider (93) is slidably mounted on the guide rail (21); the stand (92) and the travel motor (94) are fixed on the slider (93); the gear and the output shaft of the travel motor (94) are connected in a transmission manner.

7. A brittle material profile grinding and polishing device as claimed in any one of claims 1 to 6, characterized in that: The disc repairing module (8) comprises a linear motion module (81), a disc repairing electric cylinder (83) and a grinding head (82); the linear motion module (81) is fixed on the frame (1); the disc repairing electric cylinder (83) is installed on the linear motion module (81); and the grinding head (82) is fixed on the piston rod of the disc repairing electric cylinder (83).

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