Brake disc casting production line
By designing an automated brake disc casting production line, which utilizes components such as motor-driven chain rotation, electric heater preheating, precise pouring from the casting box, and hydraulic rod grinding, the problems of low automation and high labor costs in existing technologies have been solved, achieving efficient production and high-quality brake disc casting.
Patent Information
- Application Number
- CN202423120608.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing brake disc casting production lines have low levels of automation, making it difficult to guarantee production efficiency and product quality. Furthermore, they are inconvenient to maintain and have high labor costs.
A brake disc casting production line was designed, comprising components such as a worktable, rotating frame, chain, motor, electric heater, pouring box, water pump, and hydraulic rod. The chain is driven by a motor to rotate and achieve cyclic casting. The casting disc is preheated by an electric heater, the pouring box is used for precise pouring, the water pump is used for cooling, the hydraulic rod is used to polish the disc surface, and a flipping mechanism is used to detect the casting quality.
It improved the automation level of the brake disc casting production line, shortened the production cycle, reduced labor costs, and increased production efficiency and yield.
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Figure CN223557250U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of parts manufacturing, especially relates to a brake disc casting production line. BACKGROUND
[0002] The brake disc casting production line is an automatic manufacturing system specially used for producing brake discs, in the production process of automobile brake discs, brake disc production is the traditional manual and semi-automatic production process, although these methods have lower equipment investment cost, but have low production efficiency, unstable product quality, and are difficult to meet the requirements of modern automobile industry for efficient production and high-quality products, with the progress of science and technology, more and more enterprises begin to pay attention to how to improve production efficiency, reduce production cost and improve market competitiveness of products through technological innovation, the automatic and intelligent brake disc casting production line becomes a research hotspot and development trend in the industry.
[0003] Through retrieval, the patent with the patent publication number CN220516361U discloses an automobile brake disc finishing production line, which comprises a main body and an inverted lathe, a brake disc clamp is movably connected to the surface of the inverted lathe, an adjusting mechanism comprises a fixed block, the fixed block is fixedly connected to the surface of a polishing turntable, a servo motor is fixedly connected to the surface of the fixed block, an output shaft is arranged on the surface of the servo motor, a chuck is fixedly connected to the output shaft of the servo motor, the output shaft of the servo motor drives rotation, a rotating rod is fixedly connected to the surface of the chuck, the rotating rod is fixedly connected to a polishing block, the utility model discloses a fixed block, a servo motor, a chuck, a rotating rod, a polishing block, an air cylinder and a clamping block, so that the polishing block for polishing the brake can rotate and be replaced, the production line is prevented from stopping due to frequent replacement of the polishing equipment, and the efficiency of producing the brake disc is improved, in the existing brake disc casting production line, the existing brake disc casting production line is either low in automation degree, or is excessively closed, and the maintainability and economy of the equipment are ignored, so that the brake disc casting production line cannot realize the best cost-benefit ratio, the brake disc casting production line is low in automation degree and inconvenient to maintain, and labor cost is wasted. UTILITY MODEL CONTENTS
[0004] In order to make up for the above shortcomings, the utility model provides a brake disc casting production line, which aims at improving the problems of low automation degree, high maintenance and labor cost in the prior art.
[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a brake disc casting production line, including the workstation, the top front and back sides of workstation are all fixedly connected with fixed strip, the adjacent side of two fixed strip is all rotatably connected with a plurality of rollers, the outer wall top of a plurality of rollers is slidably connected with a plurality of fixed disc, the top of a plurality of fixed disc is provided with rotary frame, the inner wall of rotary frame is rotatably connected with chain, the adjacent side of chain is fixedly connected with a plurality of casting disc, a plurality of casting disc and fixed disc are engagedly connected, the inner wall right side of rotary frame is fixedly connected with motor, the output of motor is fixedly connected with gear no.
[0006] Through the above technical scheme: the workstation is equipped with fixed strip and a plurality of rollers, the roller is used for conveying brake disc and is fixed by fixed disc, there is rotary frame and the chain of inner wall rotation on top, the chain is connected with casting disc to circulate casting, the right side of rotary frame is equipped with motor and gear no.
[0007] As further description of the above technical scheme:
[0008] The turning mechanism includes a fixed frame, the fixed frame is fixedly connected to the outer wall of the workbench, the inner wall of the two fixed frames is fixedly connected with a rack, the inner wall of the workbench is provided with a threaded rod, the front and rear sides of the threaded rod are threadedly connected with a fixed clamp, the outer wall of the fixed clamp is fixedly connected with a connecting column, the outer wall of the threaded rod is fixedly connected with a gear one at the rear end, and the gear one is meshed with the rack.
[0009] Through the above technical scheme: the two sides of the workbench are fixedly connected with fixed frames, the inner walls of the fixed frames are provided with racks for accurately positioning the lifting of the brake disc, the middle threaded rods are used for adjusting the fixed clamps by rotating to clamp the brake disc and adjust the tightness of the brake disc, the outer walls of the fixed clamps are connected with connecting columns for overturning, and the rear ends of the threaded rods are provided with gears engaged with the racks to ensure the accuracy of the lifting action and overturn the brake disc for inspection.
[0010] As a further description of the above technical scheme:
[0011] The outer wall of the threaded rod is fixedly connected with a handle at the front end, and the outer wall of the handle is provided with anti-skid lines.
[0012] Through the above technical scheme: the threaded rod is provided with a handle with anti-skid lines at the front end to improve the operation convenience and prevent slipping.
[0013] As a further description of the above technical scheme:
[0014] The outer wall of the hydraulic rod is provided with a second bolt at the middle, and the four corners of the second bolt are threadedly connected with buffer pads.
[0015] Through the above technical scheme: the hydraulic rod is provided with a second bolt at the middle to connect the buffer pads for shock absorption and buffering, thereby prolonging the service life.
[0016] As a further description of the above technical scheme:
[0017] The front and rear sides of the two rotating frames are fixedly connected with fixed columns, and the outer walls of the fixed columns are fixedly connected with supports.
[0018] Through the above technical scheme: the rotating frames are provided with fixed columns at the two sides, and the outer walls of the fixed columns are connected with multiple supports to enhance the stability and support.
[0019] As a further description of the above technical scheme:
[0020] The outer wall of the pouring box is fixedly connected with a support frame at the right side, and the inner wall of the support frame is threadedly connected with a first bolt.
[0021] Through the above technical scheme: the pouring box is fixedly connected with a support frame at the right side, and the inner wall of the support frame is connected with the first bolt through threads to enhance the firmness and structural stability.
[0022] As a further description of the above technical scheme:
[0023] The bottom of the workbench is fixedly connected with multiple support legs at equal intervals, and the bottom ends of the support legs are fixedly connected with anti-skid pads.
[0024] Through the above technical scheme: the bottom of the workbench is fixed by multiple support legs, and the bottom ends of the support legs are provided with anti-skid pads to ensure the structural stability and prevent slipping.
[0025] As a further description of the above technical solutions:
[0026] The top right side of the workbench is fixedly connected with a plurality of supporting legs, and the top ends of the supporting legs are fixedly connected with heat preservation shells.
[0027] Through the above technical solutions: the top right side of the workbench is provided with a plurality of supporting legs, and the heat preservation shells are connected, so that the heat during preheating is maintained.
[0028] The utility model has the advantages of the following beneficial effects:
[0029] 1. In the utility model, the rotary frame is arranged above the workbench, the inner wall is connected with the casting disc through the chain, the motor and the gear two are arranged on the right side of the rotary frame, the chain is driven by the motor, the circulation casting is realized, the production efficiency is improved, the electric heater for preheating is arranged on the top right side of the workbench, the pouring box is arranged on the left side, the feeding pipe and the metering pump are arranged on the top of the workbench, which are used for accurate pouring, the water pump is connected with the water spraying pipe in the middle of the outer wall, which is used for mold cooling, the polishing disc is arranged on the left side of the top of the workbench, which is used for polishing the surface of the brake disc, and the automation level of the brake disc casting production line is greatly improved, the production cycle is shortened, and the labor cost is reduced.
[0030] 2. In the utility model, the fixed frame is arranged on both sides of the workbench, the inner wall is provided with the rack to accurately position the brake disc lifting, the middle threaded rod is connected with the fixed clamp through the rotary adjustment, the brake disc is clamped, the tightness is adjusted, the connecting column is arranged on the outer wall of the fixed clamp and is used for overturning the clamped brake disc, the gear one is arranged on the rear end of the threaded rod and is connected with the rack, the lifting accuracy is guaranteed, the overturning structure is used to overturn the brake disc, the structure whether casting fails is checked, and the production efficiency and the yield are improved. BRIEF DESCRIPTION OF DRAWINGS
[0031] Figure 1 A perspective view of the brake disc casting production line is provided for the utility model;
[0032] Figure 2 A top view of the brake disc casting production line is provided for the utility model;
[0033] Figure 3 A front view of the brake disc casting production line is provided for the utility model;
[0034] Figure 4 An exploded view of the structure of the brake disc casting production line is provided for the utility model;
[0035] Figure 5 A split view of the overturning mechanism of the brake disc casting production line is provided for the utility model.
[0036] LEGEND:
[0037] 1, workbench; 2, turnover mechanism; 201, fixed frame; 202, rack; 203, fixed clamp; 204, threaded rod; 205, connecting column; 206, gear one; 3, fixed strip; 4, roller; 5, fixed disc; 6, rotating frame; 7, chain; 8, casting disc; 9, gear two; 10, motor; 11, electric heater; 12, fixed plate one; 13, pouring box; 14, metering pump; 15, feed pipe; 16, fixed frame; 17, water pump; 18, water spray pipe; 19, fixed plate two; 20, hydraulic rod; 21, polishing disc; 22, support; 23, fixed column; 24, support frame; 25, bolt one; 26, support leg; 27, non-slip pad; 28, handle; 29, non-slip pattern; 30, buffer pad; 31, bolt two; 32, heat preservation shell; 33, support leg. DETAILED DESCRIPTION
[0038] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0039] Referring to Figure 1 , Figure 2 and Figure 4The utility model provides a kind of brake disc casting production line, including workbench 1, the top front and rear side of workbench 1 is fixedly connected with fixed strip 3, the adjacent side of two fixed strips 3 is rotatably connected with multiple rollers 4, the outer wall top of multiple rollers 4 is slidably connected with multiple fixed discs 5, the top of multiple fixed discs 5 is provided with rotary frame 6, the inner wall of rotary frame 6 is rotatably connected with chain 7, the adjacent side of chain 7 is fixedly connected with multiple casting discs 8, multiple casting discs 8 and fixed disc 5 are engaged connection, the inner wall right side of rotary frame 6 is fixedly connected with motor 10, the output of motor 10 is fixedly connected with gear two 9, gear two 9 and chain 7 are engaged connection, the top right side of workbench 1 is provided with fixed plate one 12, the inner wall of fixed plate one 12 is equipped with electric heater 11, the top left side of workbench 1 is fixedly connected with pouring box 13, the top of pouring box 13 is communicated with feed pipe 15, the bottom of pouring box 13 is fixedly connected with metering pump 14, the outer wall middle part of workbench 1 is fixedly connected with fixed frame 16, the outer wall rear side of fixed frame 16 is fixedly connected with water pump 17, the output of water pump 17 is communicated with water jet pipe 18, the top left side of workbench 1 is fixedly connected with fixed plate two 19, the inner wall top of fixed plate two 19 is fixedly connected with hydraulic rod 20, the bottom of hydraulic rod 20 is fixedly connected with polishing disc 21, the outer wall front and rear side of workbench 1 is fixedly connected with turnover mechanism 2, and turnover mechanism 2 is used to detect turnover brake disc, the top right side of workbench 1 is fixedly connected with multiple supporting legs 33, the top end of supporting leg 33 is fixedly connected with heat preservation shell 32;
[0040] Specifically, the top of the workbench 1 is provided with a fixed strip 3 on the front and rear sides, one side of which is rotatably connected with a plurality of rollers 4, which are used to convey brake discs. The top of the roller 4 is slidably connected with a fixed disc 5 for fixing the brake disc. A rotating frame 6 is arranged above the fixed disc 5 for fixing the mechanism and keeping the structure stable. The inner wall of the rotating frame 6 is rotatably connected with a chain 7. The chain 7 is connected with a casting disc 8. The chain 7 drives the casting disc 8 to rotate, so that the structure can be cyclically cast, improving the work efficiency. A motor 10 is fixed on the right side of the rotating frame 6. The output end of the motor 10 is connected with a gear two 9, which is engaged with the chain 7. The motor 10 drives the chain 7 to rotate, saving labor. A fixed plate one 12 is arranged on the top right side of the workbench 1. An electric heater 11 is arranged on the inner wall of the fixed plate one 12 for preheating the casting disc 8. A pouring box 13 is fixed on the left side of the fixed plate one 12 for bearing high-temperature smelting raw materials. A feeding pipe 15 is arranged on the top of the pouring box 13 for pouring the raw materials into the pouring box 13. A metering pump 14 is connected to the bottom of the pouring box 13 for accurately controlling the pouring each time. A fixed frame 16 is arranged on the middle of the outer wall of the workbench 1. A water pump 17 is connected to the rear side of the fixed frame 16. The output end of the water pump 17 is communicated with a water spraying pipe 18. The water pump 17 is used to cool the brake disc in the mold. A fixed plate two 19 is arranged on the top left side of the workbench 1. The top inner wall of the fixed plate two 19 is connected with a hydraulic rod 20. The bottom end of the hydraulic rod 20 is connected with a polishing disc 21. When the hydraulic rod 20 is lowered, the polishing disc 21 is driven to polish the surface of the brake disc. A turnover mechanism 2 is arranged on the front and rear sides of the workbench 1 for detecting the turnover brake disc. A plurality of supporting legs 33 are fixed on the top right side of the turnover mechanism 2. A heat preservation shell 32 is connected to the top end of the supporting legs 33 for keeping the heat generated during preheating from being lost.
[0041] With reference to Figure 2 and Figure 5 The turnover mechanism 2 comprises a fixed frame 201 fixedly connected to the front and rear sides of the outer wall of the workbench 1. The inner wall right side of the two fixed frames 201 is fixedly connected with a rack 202. A threaded rod 204 is arranged on the inner wall of the workbench 1. The front and rear sides of the threaded rod 204 are threadedly connected with a fixed clamp 203. The outer wall of the fixed clamp 203 is fixedly connected with a connecting column 205. The outer wall rear end of the threaded rod 204 is fixedly connected with a gear one 206. The gear one 206 is engagedly connected with the rack 202. The outer wall front end of the threaded rod 204 is fixedly connected with a handle 28. The outer wall of the handle 28 is provided with anti-slip lines 29. A bolt two 31 is mounted on the middle of the outer wall of the hydraulic rod 20. The four corners of the bolt two 31 are threadedly connected with a buffer pad 30.
[0042] Specifically, the workbench 1 is provided with fixed frames 201 on both sides, and the inner wall is provided with a rack 202 to accurately position the brake disc lifting. The middle threaded rod 204 clamps the brake disc through the rotation adjustment of the fixed clamp 203, adjusts the tightness, and the outer wall of the fixed clamp 203 is connected with the column 205 for overturning. The rear end of the threaded rod 204 is provided with a gear one 206, which is engaged with the rack 202 to ensure accurate lifting. The front end of the threaded rod 204 is provided with a handle 28 with anti-skid lines 29 to increase the convenience of operation and prevent slipping. The middle of the hydraulic rod 20 is provided with a bolt two 31, which is connected with a buffer pad 30 to reduce the shock effect and prolong the service life.
[0043] With reference to Figure 1 、 Figure 2 and Figure 3 , the front and rear sides of the two rotating frames 6 are fixedly connected with fixed columns 23, the outer walls of the plurality of fixed columns 23 are fixedly connected with supports 22, the outer wall right side of the pouring box 13 is fixedly connected with a support frame 24, the inner wall of the support frame 24 is threadedly connected with a bolt one 25, and the bottom of the workbench 1 is fixedly connected with a plurality of support legs 26, and the bottom end of the plurality of support legs 26 is fixedly connected with anti-skid pads 27;
[0044] Specifically, the front and rear sides of the two rotating frames 6 are provided with fixed columns 23, and a plurality of supports 22 are fixedly connected on the outer walls of the fixed columns 23 to provide additional stability and support. The support frame 24 is fixedly connected on the outer wall right side of the pouring box 13, and the bolt one 25 is connected with the inner wall of the support frame 24 in a threaded manner to ensure the firmness of the support frame 24 and increase the stability of the structure. The bottom of the workbench 1 is fixedly connected with a plurality of support legs 26 at equal intervals, and the bottom end of the support leg 26 is fixedly connected with an anti-skid pad 27 to enhance the stability of the overall structure and prevent sliding, and to ensure the safety and stability of the workbench 1 during use.
[0045] Working principle: the top of the workbench 1 front and rear side is equipped with fixed strip 3, one side of the fixed strip 3 is rotatably connected with a plurality of rollers 4, the roller 4 is used to realize the transmission of brake disc, the top of the roller 4 is slidably connected with the fixed disc 5, the fixed disc 5 is used to fix the brake disc, and the casting disc 8 is clamped to fix the brake disc, which ensures the stability of the brake disc during transmission, the workbench 1 is provided with a rotating frame 6 above, the rotating frame 6 is used to fix the structure, which keeps the stability of the whole structure, the right side of the rotating frame 6 is fixed with a motor 10, the output end of the motor 10 is connected with gear two 9, the gear two 9 is clamped with chain 7, the chain 7 is driven to rotate by the motor 10, so as to save the manual operation, the outer wall of the chain 7 is connected with the casting disc 8, the casting disc 8 is driven to rotate by the chain 7, so that the whole structure realizes circulating casting, thereby improving the work efficiency and reducing the labor cost, the top right side of the workbench 1 is provided with a fixed plate one 12, the inner wall is equipped with an electric heater 11, the electric heater 11 preheats the casting disc 8 to ensure the smooth progress of the casting process, the left side is fixed with a pouring box 13, the pouring box 13 can bear high temperature smelting raw materials, which ensures the stability of the raw materials during casting, the top of the workbench 1 is provided with a feeding pipe 15, the raw materials are poured into the pouring box 13 through the feeding pipe 15, which ensures the accurate feeding of the raw materials, the bottom is connected with a metering pump 14, the metering pump 14 can accurately control the amount of pouring each time, which ensures the accuracy of the casting process, the middle of the outer wall of the workbench 1 is provided with a fixed frame 16, the rear side of the fixed frame 16 is connected with a water pump 17, the output end of the water pump 17 is communicated with a water spraying pipe 18, the water pump 17 is used to cool the brake disc in the mold, which ensures the cooling effect of the brake disc during casting, the top left side of the workbench 1 is fixed with a fixed plate two 19, the inner wall of the fixed plate two 19 is connected with a hydraulic rod 20, the bottom end of the hydraulic rod 20 is connected with a polishing disc 21, when the hydraulic rod 20 descends, the polishing tray drives the brake disc to polish the surface, which ensures the surface smoothness and quality of the brake disc, significantly improves the automation degree of the brake disc casting production line, shortens the production cycle, and reduces the labor cost;
[0046] The outer wall of the workbench 1 is fixedly connected with two fixed frames 201 respectively, which is used to fix the turnover mechanism 2, the inner wall of the two fixed frames 201 is respectively fixedly connected with a rack 202, the rack 202 realizes accurate positioning of brake disc lifting, a threaded rod 204 is arranged in the middle of the inner wall of the workbench 1, the front and rear sides of the threaded rod 204 are fixedly connected with a fixed clamp 203 through threads, the fixed clamp 203 is adjusted by rotating the threaded rod 204 to clamp and fix the brake disc, the tightness is adjusted, the outer wall of the fixed clamp 203 is respectively fixedly connected with a connecting column 205, the fixed column 23 is used to realize structure turnover, and the bottom of the brake disc is observed, the outer wall of the threaded rod 204 is fixedly connected with a gear one 206 at the rear end, the gear one 206 is meshed with the rack 202, which ensures the accuracy of lifting.
[0047] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, the made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. A cast production line for brake discs, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected with a fixed strip (3) on the front and rear sides, the adjacent side of the two fixed strips (3) is rotatably connected with a plurality of rollers (4), the outer wall top of the plurality of rollers (4) is slidably connected with a plurality of fixed discs (5), the top of the plurality of fixed discs (5) is provided with a rotating frame (6), the inner wall of the rotating frame (6) is rotatably connected with a chain (7), the adjacent side of the chain (7) is fixedly connected with a plurality of casting discs (8), the plurality of casting discs (8) are hingedly connected with the fixed disc (5), the inner wall right side of the rotating frame (6) is fixedly connected with a motor (10), the output end of the motor (10) is fixedly connected with a gear two (9), the gear two (9) is hingedly connected with the chain (7), the top right side of the workbench (1) is provided with a fixed plate one (12), the inner wall of the fixed plate one (12) is mounted with an electric heater (11), the top left side of the workbench (1) is fixedly connected with a pouring box (13), the top of the pouring box (13) is communicated with a feeding pipe (15), the bottom of the pouring box (13) is fixedly connected with a metering pump (14), the outer wall middle of the workbench (1) is fixedly connected with a fixed frame (16), the outer wall rear side of the fixed frame (16) is fixedly connected with a water pump (17), the output end of the water pump (17) is communicated with a water spraying pipe (18), the top left side of the workbench (1) is fixedly connected with a fixed plate two (19), the inner wall top of the fixed plate two (19) is fixedly connected with a hydraulic rod (20), the bottom end of the hydraulic rod (20) is fixedly connected with a polishing disc (21), the outer wall front and rear sides of the workbench (1) are fixedly connected with a turnover mechanism (2), and the turnover mechanism (2) is used for detecting a turnover brake disc.
2. A brake disc casting production line according to claim 1, characterized in that: The turnover mechanism (2) comprises a fixed frame (201), the fixed frame (201) is fixedly connected on the outer wall front and rear sides of the workbench (1), the inner wall right side of the two fixed frames (201) is fixedly connected with a rack (202), the inner wall middle of the workbench (1) is provided with a threaded rod (204), the front and rear sides of the threaded rod (204) are threadedly connected with a fixed clamp (203), the outer wall of the fixed clamp (203) is fixedly connected with a connecting column (205), the outer wall rear end of the threaded rod (204) is fixedly connected with a gear one (206), and the gear one (206) is hingedly connected with the rack (202).
3. A brake disc casting line according to claim 2, characterized in that: The outer wall front end of the threaded rod (204) is fixedly connected with a rotating handle (28), and the outer wall of the rotating handle (28) is provided with anti-skid lines (29).
4. A brake disc casting production line according to claim 1, characterized in that: The outer wall middle of the hydraulic rod (20) is mounted with a bolt two (31), and the four corners of the bolt two (31) are threadedly connected with a buffer pad (30).
5. A brake disc casting production line according to claim 1, characterized in that: The front and rear sides of the two rotating frames (6) are fixedly connected with a fixed column (23), and the outer wall of the plurality of fixed columns (23) is fixedly connected with a support (22).
6. A brake disc casting production line according to claim 1, characterized in that: The outer wall right side of the pouring box (13) is fixedly connected with a support frame (24), and the inner wall of the support frame (24) is threadedly connected with a bolt one (25).
7. A brake disc casting production line according to claim 1, characterized in that: The bottom of the workbench (1) is fixedly connected with a plurality of support legs (26) at equal intervals, and the bottom ends of the plurality of support legs (26) are fixedly connected with anti-skid pads (27).
8. A brake disc casting production line according to claim 1, characterized in that: The top right side of the workbench (1) is fixedly connected with a plurality of support legs (33), and the top ends of the support legs (33) are fixedly connected with heat preservation shells (32).
Citation Information
Patent Citations
Finish machining production line for automobile brake disc
CN220516361U