A cold rolling device for abrasive stainless steel plate

Abstract

The utility model belongs to the field of plate rolling technology, specifically is a kind of frosted stainless steel plate cold rolling device, including base, and the base is fixedly connected with cold rolling frame;The side wall of cold rolling frame is fixedly connected with cold rolling drive motor;The output end of cold rolling drive motor is fixedly connected with roll;The other end of roll is fixedly connected with driving gear;The side wall of cold rolling frame is fixedly connected with multiple supports;The end of support is fixedly connected with infusion pipeline;The side wall of cold rolling frame is fixedly connected with liquid storage tank;The side wall of liquid storage tank is fixedly connected with pressurizing pump;The side wall of infusion pipeline is fixedly connected with cold rolling liquid spray head;The top of base is fixedly connected with multiple scraper frame;The top of scraper frame is fixedly connected with inclined liquid scraping plate;By increasing infusion pipeline, cold rolling liquid can be more uniform when spraying on the surface of plate, reduce the change of organization performance caused by uneven cold rolling liquid spraying, even the emergence of heat deformation, warping situation.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal rolling technology, specifically a cold rolling device for brushed stainless steel sheets. Background Technology

[0002] Stainless steel sheet is a sheet material rolled from stainless steel. Due to the passivation film formed by alloying components such as chromium and nickel, it possesses excellent corrosion resistance, resisting the erosion of air, water, and various chemical media. It has high strength and good toughness, and can be produced in different thicknesses and surface finishes through cold rolling, hot rolling, and other processes to meet diverse processing needs. It is widely used in construction decoration, chemical equipment, food industry, medical devices, and other fields, making it a metal material that combines practicality and durability.

[0003] The cold rolling unit for brushed stainless steel sheets first feeds the pre-treated stainless steel billet into the rolling mill, where pressure is applied by the rolls to roll the sheet, reducing its thickness and improving its mechanical properties and surface smoothness. The rolled sheet then enters the subsequent processing stage, where the unit uses abrasive belts or grinding wheels to uniformly polish its surface, creating a specific brushed texture.

[0004] Uneven spraying of cold rolling melt during cold rolling can lead to excessively high local temperatures in the sheet material, resulting in abnormal microstructure, thermal deformation, or warping. This can compromise the stability of the sheet material's mechanical properties. Furthermore, excessive residual cold rolling melt on the sheet material surface can interfere with subsequent processing steps, affecting processing continuity and equipment lifespan.

[0005] Therefore, a cold rolling device for brushed stainless steel sheets is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A cold rolling device for brushed stainless steel sheets, comprising a base, on which a cold rolling frame is fixedly connected; a cold rolling drive motor is fixedly connected to the side wall of the cold rolling frame; a roller is fixedly connected to the output end of the cold rolling drive motor; a drive gear is fixedly connected to the other end of the roller; another roller is rotatably connected inside the cold rolling frame; a driven gear is fixedly connected to the end of the roller; the driven gear and the drive gear are correspondingly arranged; multiple supports are fixedly connected to the side wall of the cold rolling frame; a liquid delivery pipe is fixedly connected to the end of each support; a liquid storage tank is fixedly connected to the side wall of the cold rolling frame; a pressure pump is fixedly connected to the side wall of the liquid storage tank; and the... Multiple cold-rolled liquid nozzles are fixedly connected to the side wall of the infusion pipeline; multiple scraper frames are fixedly connected to the top of the base; and inclined scraper blades are fixedly connected to the top of the scraper frames. By adding cold-rolled liquid nozzles, the cold-rolled liquid can be sprayed more evenly onto the surface of the sheet, reducing changes in the material properties caused by uneven spraying of the cold-rolled liquid and excessively high local temperatures, and even thermal deformation and warping. At the same time, the inclined scraper blades can scrape off excess cold-rolled liquid from the surface of the sheet and guide and remove excess cold-rolled liquid, reducing the impact of excessive cold-rolled liquid on subsequent processing, and even preventing damage to the equipment caused by excessive dripping onto precision components at the bottom.

[0008] Preferably, an acid pickling tank is fixedly connected to the top of the base; a storage tank is fixedly connected to the top of the acid pickling tank; multiple acid pickling pumps are fixedly connected to the top of the inner side of the acid pickling tank; acid pickling nozzles are fixedly connected to the ends of the acid pickling pumps; a waste liquid discharge port is opened inside the acid pickling tank; a waste liquid tank is fixedly connected to the side wall of the acid pickling tank; the waste liquid tank and the waste liquid discharge port are correspondingly arranged; by adding an acid pickling tank, the risk of equipment damage and personnel safety hazards caused by acid splashing during acid pickling can be reduced. At the same time, adding a waste liquid discharge port can treat the acid pickling liquid accumulated inside the acid pickling tank, reducing the occurrence of acid pickling liquid remaining inside the machine parts and causing corrosion.

[0009] Preferably, a pair of limiting frames are fixedly connected to the top of the base; a C-shaped clamp is fixedly connected to the top of the limiting frame; a hydraulic rod is fixedly connected to the inner side wall of the C-shaped clamp; and an elastic clamping plate is fixedly connected to the output end of the hydraulic rod. By adding the C-shaped clamp, the transfer of the sheet metal can be made more stable, and the addition of the hydraulic rod allows the C-shaped clamp to adapt to the insertion of sheet metal of different specifications.

[0010] Preferably, a plurality of sidewall scrapers are fixedly connected to the middle of the pickling tank; the sidewall scrapers are correspondingly arranged with the inclined scraping plate; by adding sidewall scrapers, auxiliary processing can be performed with the preceding steps, reducing the possibility of deviations in subsequent steps due to incomplete removal of substances from the surface.

[0011] Preferably, a return liquid guide channel is fixedly connected to the top of the base; a collection tank is fixedly connected to the side wall of the return liquid guide channel; a collection box is fixedly connected to the side wall of the base; a filter screen is fixedly connected inside the collection box; a circulation pump is fixedly connected to the side wall of the collection box; a recovery pipe is fixedly connected to the end of the circulation pump; and a storage tank is fixedly connected to the end of the recovery pipe. By adding the return liquid guide channel, the cold rolling liquid scraped off by the inclined scraper can be collected and processed. At the same time, adding the filter screen can remove impurities in the cold rolling liquid, reducing the deviation in the cold rolling liquid effect caused by impurities. In addition, adding the circulation pump allows the cold rolling liquid collected in the collection box to be recycled, reducing resource waste.

[0012] Preferably, a frame is fixedly connected to the top of the base; an upper grinding drive motor is fixedly connected to the top of the frame; an upper drive shaft is fixedly connected to the output end of the upper grinding drive motor; an upper grinding plate is fixedly connected to the end of the upper drive shaft; a lower grinding drive motor is fixedly connected to the bottom of the base; a lower drive shaft is fixedly connected to the end of the lower grinding drive motor; a lower grinding plate is fixedly connected to the end of the lower drive shaft; the lower grinding plate and the upper grinding plate are correspondingly arranged; by adding the upper drive shaft and the lower grinding plate, the occurrence of defects such as indentations or oxide scale on the surface of the sheet metal caused by the rolling process can be reduced, and the cumbersomeness of subsequent processing can be reduced.

[0013] The advantages of this utility model are: 1. The cold rolling device for brushed stainless steel sheet described in this utility model can make the cold rolling liquid sprayed on the sheet surface more uniformly by adding cold rolling liquid spray nozzles. This reduces the changes in the microstructure and properties caused by uneven spraying of cold rolling liquid and excessively high local temperature of the sheet, and even the occurrence of thermal deformation and warping. At the same time, the addition of inclined scraper can scrape off excess cold rolling liquid from the sheet surface and guide and remove excess cold rolling liquid, reducing the impact of excessive cold rolling liquid on subsequent processing, and even the damage to the equipment caused by excessive dripping onto the precision parts at the bottom.

[0014] 2. The cold rolling device for brushed stainless steel sheets described in this utility model can reduce the risk of equipment damage and worker safety hazards caused by pickling liquid splashing during pickling by adding a pickling tank. At the same time, adding a waste liquid discharge outlet can treat the pickling liquid accumulated inside the pickling tank, reducing the occurrence of pickling liquid remaining inside the machine parts and causing corrosion. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main body of this utility model; Figure 2 This is a schematic diagram of the infusion pipeline in this utility model; Figure 3 This is a schematic diagram of the pickling tank in this utility model; Figure 4 This is a schematic diagram of the structure of the driving gear in this utility model; Figure 5 This is a schematic diagram of the limiting frame in this utility model; Figure 6 This is a schematic diagram of the upper grinding drive motor in this utility model.

[0017] In the diagram: 1. Base; 11. Cold rolling drive motor; 12. Roll; 13. Drive gear; 14. Driven gear; 15. Support; 16. Infusion pipeline; 17. Storage tank; 18. Booster pump; 19. Cold rolling liquid nozzle; 101. Inclined scraper; 102. Scraper frame; 103. Cold rolling frame; 2. Pickling pump; 21. Pickling nozzle; 22. Storage tank; 23. Pickling tank; 24. Waste liquid outlet; 25. 1. Waste liquid tank; 3. Limiting frame; 31. C-type clamp; 32. Hydraulic rod; 33. Elastic clamping plate; 4. Side wall scraper; 5. Return liquid guide channel; 51. Collection tank; 52. Filter screen; 53. Collection box; 54. Circulation pump; 55. Recovery pipeline; 6. Upper grinding drive motor; 61. Upper drive shaft; 62. Upper grinding plate; 63. Frame; 64. Lower grinding drive motor; 65. Lower drive shaft; 66. Lower grinding plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Specific implementation examples are given below.

[0020] like Figures 1 to 6As shown in the embodiment of this utility model, a cold rolling device for brushed stainless steel sheet includes a base 1. The device is characterized by: a cold rolling frame 103 fixedly connected to the base 1; a cold rolling drive motor 11 fixedly connected to the side wall of the cold rolling frame 103; a roller 12 fixedly connected to the output end of the cold rolling drive motor 11; a drive gear 13 fixedly connected to the other end of the roller 12; another roller 12 rotatably connected inside the cold rolling frame 103; a driven gear 14 fixedly connected to the end of the roller 12; the driven gear 14 and the drive gear 13 are correspondingly arranged; and the side wall of the cold rolling frame 103 is fixedly connected to... There are multiple supports 15; each support 15 has a liquid delivery pipe 16 fixedly connected to its end; a liquid storage tank 17 is fixedly connected to the side wall of the cold rolling frame 103; a pressure pump 18 is fixedly connected to the side wall of the liquid storage tank 17; multiple cold rolling liquid nozzles 19 are fixedly connected to the side wall of the liquid delivery pipe 16; the cold rolling liquid nozzles 19 are correspondingly arranged with the liquid delivery pipe 16; multiple scraper frames 102 are fixedly connected to the top of the base 1; an inclined scraper 101 is fixedly connected to the top of the scraper frame 102; when the plate is inserted, the pressure pump 18 is started, and then the pressure pump 18 pressurizes the cold rolling liquid inside the liquid storage tank 17, and the cold rolling liquid is sprayed... The nozzle 19 sprays out the cold rolling molten metal, which then sprays onto the surface of the sheet metal. The cold rolling drive motor 11 is then started, causing the roll 12 to rotate. The roll 12 drives the drive gear 13 to rotate, which meshes with the driven gear 14. The driven gear 14 is then driven by the drive gear 13 to rotate. The roll 12 then conveys and rolls the sheet metal. When the sheet metal reaches the inclined scraper 101, the inclined scraper 101 scrapes off excess cold rolling molten metal from the surface of the sheet metal. The cold rolling molten metal then flows along the inclined scraper... The scraper 101 transfers the liquid to the subsequent processing components. By adding the cold rolling liquid nozzle 19, the cold rolling liquid can be sprayed more evenly on the surface of the sheet, reducing the changes in the microstructure and properties caused by uneven spraying of the cold rolling liquid and excessive local temperature of the sheet, and even the occurrence of thermal deformation and warping. At the same time, the addition of the inclined scraper 101 can scrape off the excess cold rolling liquid on the surface of the sheet and guide and remove the excess cold rolling liquid, reducing the impact of excessive cold rolling liquid on subsequent processing, and even the damage to the equipment caused by excessive dripping onto the precision components at the bottom.

[0021] like Figure 1 , Figure 3 , Figure 4 , Figure 6As shown, a pickling tank 23 is fixedly connected to the top of the base 1; a storage tank 22 is fixedly connected to the top of the pickling tank 23; multiple pickling pumps 2 are fixedly connected to the top of the inner side of the pickling tank 23; pickling nozzles 21 are fixedly connected to the ends of the pickling pumps 2; a waste liquid outlet 24 is opened inside the pickling tank 23; a waste liquid tank 25 is fixedly connected to the side wall of the pickling tank 23; the waste liquid tank 25 and the waste liquid outlet 24 are correspondingly arranged; after the plate is rolled, it will continue to be transported. When the plate is transported to the pickling tank 23, the pickling pump 2 is started; then the pickling pump 2 will pressurize the pickling liquid inside the storage tank 22, and then the pickling liquid will... Inside the pickling tank 23, all surfaces of the sheet metal are pickled using pickling nozzles 21. The sheet metal continues to be conveyed, and the pickling tank 23 scrapes off the pickling solution and the cold rolling liquid processed by the inclined scraper 101 from the surface of the sheet metal. The pickling solution inside the pickling tank 23 is then discharged into the waste liquid tank 25 through the waste liquid outlet 24. By adding the pickling tank 23, the risk of equipment damage and worker safety hazards caused by pickling solution splashing during pickling can be reduced. At the same time, the waste liquid outlet 24 can treat the pickling solution accumulated inside the pickling tank 23, reducing the possibility of pickling solution remaining inside the machine parts and causing corrosion.

[0022] like Figure 1 , Figure 5 As shown, a pair of limiting frames 3 are fixedly connected to the top of the base 1; a C-shaped clamp 31 is fixedly connected to the top of the limiting frame 3; a hydraulic rod 32 is fixedly connected to the inner side wall of the C-shaped clamp 31; an elastic clamping plate 33 is fixedly connected to the output end of the hydraulic rod 32; when the plate is inserted, the hydraulic rod 32 is activated, and then the hydraulic rod 32 will drive the elastic clamping plate 33 to limit the side wall of the plate; by adding the C-shaped clamp 31, the plate can be transported more stably, and at the same time, adding the hydraulic rod 32 allows the C-shaped clamp 31 to adapt to the insertion of plates of different specifications.

[0023] like Figure 3 As shown, a plurality of side wall scrapers 4 are fixedly connected to the middle of the pickling tank 23; the side wall scrapers 4 are correspondingly arranged with the inclined scraper plate 101; when the pickling tank 23 scrapes the plate, the side wall scrapers 4 will scrape the side wall of the plate; by adding the side wall scrapers 4, it can assist the previous steps and reduce the possibility of deviation in subsequent steps due to insufficient scraping of the surface material.

[0024] like Figure 3As shown, a return liquid guide channel 5 is fixedly connected to the top of the base 1; a collection tank 51 is fixedly connected to the side wall of the return liquid guide channel 5; a collection box 53 is fixedly connected to the side wall of the base 1; a filter screen 52 is fixedly connected inside the collection box 53; a circulation pump 54 is fixedly connected to the side wall of the collection box 53; a recovery pipe 55 is fixedly connected to the end of the circulation pump 54; a storage tank 17 is fixedly connected to the end of the recovery pipe 55; when the inclined scraper 101 scrapes the cold rolling liquid on the surface of the plate, the cold rolling liquid will then be transferred through the return liquid guide channel 5 to the inside of the collection box 51 by the inclination of the inclined scraper 101, and then the cold rolling liquid will pass through the collection box 51. The cold rolling liquid flows into the surface of the filter screen 52, where it is filtered. The liquid then flows into the collection tank 53. The circulation pump 54 is activated, which drives the cold rolling liquid inside the collection tank 53 through the recovery pipe 55 to the storage tank 17. By adding the return guide trough 5, the cold rolling liquid scraped by the inclined scraper 101 can be collected and processed. At the same time, the filter screen 52 can remove impurities from the cold rolling liquid, reducing the deviation in the cold rolling liquid effect caused by impurities. The circulation pump 54 allows the cold rolling liquid collected in the collection tank 53 to be recycled, reducing resource waste.

[0025] like Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, a frame 63 is fixedly connected to the top of the base 1; an upper grinding drive motor 6 is fixedly connected to the top of the frame 63; an upper drive shaft 61 is fixedly connected to the output end of the upper grinding drive motor 6; an upper grinding plate 62 is fixedly connected to the end of the upper drive shaft 61; a lower grinding drive motor 64 is fixedly connected to the bottom of the base 1; a lower drive shaft 65 is fixedly connected to the end of the lower grinding drive motor 64; a lower grinding plate 66 is fixedly connected to the end of the lower drive shaft 65; the lower grinding plate 66 and the upper grinding plate 62 are correspondingly arranged; starting the upper grinding drive motor 6 and the lower grinding drive motor 6... Motor 64, then the upper grinding drive motor 6 and the lower grinding drive motor 64 will drive the upper drive shaft 61 and the lower drive shaft 65 to rotate respectively. The upper drive shaft 61 and the lower drive shaft 65 will drive the upper grinding plate 62 and the lower grinding plate 66 to rotate. When the plate passes through the frame 63, the upper grinding plate 62 and the lower grinding plate 66 will grind the surface of the plate. By adding the upper drive shaft 61 and the lower grinding plate 66, the occurrence of defects such as indentations or oxide scale on the surface of the plate caused by the rolling process can be reduced, and the cumbersomeness of subsequent processing can be reduced.

[0026] Working principle: After the sheet is inserted, the pressure pump 18 is started, which pressurizes the cold rolling molten liquid inside the storage tank 17. The cold rolling molten liquid nozzle 19 sprays the molten liquid onto the surface of the sheet. Then, the cold rolling drive motor 11 is started, and the roller 12 rotates. The roller 12 drives the drive gear 13 to rotate, and the drive gear 13 meshes with the driven gear 14. The driven gear 14 is then driven by the drive gear 13 to rotate. The roller 12 then conveys and rolls the sheet. When the sheet is conveyed to the inclined scraper... When the sheet is rolled, the inclined scraper 101 scrapes off excess cold rolling liquid from the surface of the sheet. The cold rolling liquid is then conveyed by the inclined scraper 101 to subsequent processing units. After rolling, the sheet continues to be conveyed. When the sheet reaches the pickling tank 23, the pickling pump 2 is activated. The pickling pump 2 then pressurizes the pickling liquid inside the storage tank 22. The pickling liquid then passes through the pickling nozzles 21 inside the pickling tank 23 to pickle all surfaces of the sheet. The sheet continues to be conveyed, and the pickling tank 23 scrapes off the pickling liquid and the cold rolling liquid treated by the inclined scraper 101 from the sheet surface. The pickling process continues. The pickling solution inside the pickling tank 23 is discharged into the waste liquid tank 25 through the waste liquid outlet 24. When the plate is inserted, the hydraulic rod 32 is activated, and then the hydraulic rod 32 drives the elastic clamp 33 to limit the side wall of the plate. When the pickling tank 23 scrapes the plate, the side wall scraper 4 scrapes the side wall of the plate. When the inclined scraper 101 scrapes the cold rolling liquid on the surface of the plate, the cold rolling liquid is then transferred to the inside of the collection tank 51 through the return guide channel 5 by the inclination of the inclined scraper 101. Then the cold rolling liquid flows into the surface of the filter screen 52 through the collection tank 51. The filter screen 52 will then... The cold rolling liquid is filtered and then flows into the collection tank 53. The circulation pump 54 is started, which drives the cold rolling liquid inside the collection tank 53 to be transported to the storage tank 17 through the recovery pipe 55. The upper grinding drive motor 6 and the lower grinding drive motor 64 are started. Then, the upper grinding drive motor 6 and the lower grinding drive motor 64 drive the upper drive shaft 61 and the lower drive shaft 65 to rotate respectively. The upper drive shaft 61 and the lower drive shaft 65 drive the upper grinding plate 62 and the lower grinding plate 66 to rotate. When the plate passes through the frame 63, the upper grinding plate 62 and the lower grinding plate 66 will grind the surface of the plate.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cold rolling apparatus for brushed stainless steel sheets, comprising a base (1), characterized in that: A cold rolling frame (103) is fixedly connected to the base (1); a cold rolling drive motor (11) is fixedly connected to the side wall of the cold rolling frame (103); a roll (12) is fixedly connected to the output end of the cold rolling drive motor (11); a drive gear (13) is fixedly connected to the end of the roll (12); another roll (12) is rotatably connected inside the cold rolling frame (103); a driven gear (14) is fixedly connected to the end of the roll (12); the driven gear (14) and the drive gear (13) are meshed with each other. The cold rolling frame (103) has multiple supports (15) fixed to its side wall; the support (15) has a liquid delivery pipe (16) fixed to its end; the cold rolling frame (103) has a liquid storage tank (17) fixed to its side wall; the liquid storage tank (17) has a pressure pump (18) fixed to its side wall; the liquid delivery pipe (16) has multiple cold rolling liquid nozzles (19) fixed to its side wall; the base (1) has multiple scraper frames (102) fixed to its top; the scraper frame (102) has an inclined scraper plate (101) fixed to its top.

2. The cold rolling apparatus for brushed stainless steel sheet according to claim 1, characterized in that: The base (1) is fixedly connected to the top of the pickling tank (23); the pickling tank (23) is fixedly connected to the top of the top of the pickling tank (23); multiple pickling pumps (2) are fixedly connected to the top of the inner side of the pickling tank (23); pickling nozzles (21) are fixedly connected to the end of the pickling pumps (2); a waste liquid outlet (24) is opened inside the pickling tank (23); a waste liquid tank (25) is fixedly connected to the side wall of the pickling tank (23); the waste liquid tank (25) and the waste liquid outlet (24) are set in a corresponding manner.

3. The cold rolling apparatus for brushed stainless steel sheet according to claim 2, characterized in that: A pair of limiting frames (3) are fixedly connected to the top of the base (1); a C-shaped clamp (31) is fixedly connected to the top of the limiting frame (3); a hydraulic rod (32) is fixedly connected to the inner side wall of the C-shaped clamp (31); and an elastic clamp (33) is fixedly connected to the output end of the hydraulic rod (32).

4. The cold rolling apparatus for brushed stainless steel sheet according to claim 3, characterized in that: The pickling tank (23) has multiple side wall scrapers (4) fixed in the middle; the side wall scrapers (4) and the inclined scraper (101) are arranged in a corresponding manner.

5. The cold rolling apparatus for brushed stainless steel sheet according to claim 4, characterized in that: The base (1) is fixedly connected to the top of a return liquid guide channel (5); a liquid collection tank (51) is fixedly connected to the side wall of the return liquid guide channel (5); a collection box (53) is fixedly connected to the side wall of the base (1); a filter screen (52) is fixedly connected inside the collection box (53); a circulation pump (54) is fixedly connected to the side wall of the collection box (53); a recovery pipe (55) is fixedly connected to the end of the circulation pump (54); and a storage tank (17) is fixedly connected to the end of the recovery pipe (55).

6. The cold rolling apparatus for brushed stainless steel sheet according to claim 5, characterized in that: The base (1) is fixed to the top of the frame (63); the frame (63) is fixed to the top of the upper grinding drive motor (6); the output end of the upper grinding drive motor (6) is fixed to the upper transmission shaft (61); the end of the upper transmission shaft (61) is fixed to the upper grinding plate (62); the base (1) is fixed to the bottom of the lower grinding drive motor (64); the end of the lower grinding drive motor (64) is fixed to the lower transmission shaft (65); the end of the lower transmission shaft (65) is fixed to the lower grinding plate (66); the lower grinding plate (66) and the upper grinding plate (62) are arranged correspondingly.

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