Mirror polishing machine

Abstract

The utility model provides a mirror surface polishing machine which comprises a machine frame, a polishing device and a polishing device. The polishing mechanism comprises a polishing grinding wheel rotationally arranged on the workbench, a main shaft arranged on the rack and a driving assembly arranged in the main shaft, and the driving assembly is used for driving the polishing grinding wheel to rotate; each clamp mechanism comprises a base arranged on the workbench, a placing table arranged on the base and used for placing a workpiece, and a pressing assembly arranged on the base and used for pressing the workpiece; and the cooling mechanism comprises a cooling liquid tank and a cooling machine for cooling the cooling liquid in the cooling liquid tank. According to the mirror surface polishing machine, the cooling mechanism and the cooling machine are arranged to cool the cooling liquid in the cooling liquid box, and then the cooling liquid box conveys the cooling liquid to the polishing grinding wheel, the main shaft and the clamp mechanism for cooling, so that the probability that the polishing grinding wheel and the clamp mechanism cannot polish a workpiece is effectively reduced; and a great amount of heat is generated by friction between the polishing grinding wheel and the PCD clad sheet, so that a good cooling effect is ensured, and the polishing quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polycrystalline diamond polishing, in particular to a mirror polishing machine. Background Art

[0002] Polycrystalline diamond (PCD) composite sheet is a composite material synthesized by placing artificial diamond powder, binder, etc. on a cemented carbide substrate through high temperature and high pressure. The polycrystalline diamond composite sheet combines the extremely high wear resistance of polycrystalline diamond and the high impact resistance of cemented carbide, making it have excellent cutting performance. Therefore, the tool made of polycrystalline diamond composite sheet not only has an extremely high service life, but also improves the cutting efficiency, ensures the machining accuracy, and improves the surface quality of the machined workpiece. In order to ensure that the tool made of polycrystalline diamond composite sheet can quickly discharge chips during cutting and avoid scratching the surface of the machined workpiece, its surface needs to have an excellent mirror effect, that is, the surface of the PCD is polished to achieve a mirror effect.

[0003] In the prior art, a polishing machine tool including an end face grinding wheel and a fixed fixture is mostly used to polish the PCD surface of the composite sheet. During the polishing process of the PCD composite sheet, a large amount of heat will be generated due to the friction between the grinding wheel and the PCD composite sheet. At present, the heat dissipation of the polishing machine for the workpiece and the grinding wheel is too simple, resulting in insufficient heat dissipation during the polishing process, so that too much heat causes a slight deformation of the tooling fixture, affecting the polishing quality of the PCD composite sheet. At the same time, with the increase in the diameter and the decrease in the thickness of the polycrystalline diamond composite sheet, especially the emergence of large-area (even ultra-large-area) polycrystalline diamond composite sheets, it is very difficult to solve the problem of the mutual fit between the polished surface and the end face of the grinding wheel when polishing with traditional polishing equipment. Due to the inability to adapt to the stress deformation, thermal deformation and other factors of the polycrystalline diamond composite sheet, the efficiency of the polishing machine is extremely low. Summary of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides a mirror polishing machine to solve the technical problem that in the prior art, the heat dissipation of the polishing machine for the workpiece and the grinding wheel during the polishing process is insufficient, so that too much heat causes a slight deformation of the tooling fixture, affecting the polishing quality of the PCD composite sheet.

[0005] The utility model provides a mirror polishing machine, including:

[0006] A frame with a workbench;

[0007] A polishing mechanism, including a polishing grinding wheel rotatably arranged on the workbench, a main shaft arranged on the frame, and a driving component arranged in the main shaft for driving the polishing grinding wheel to rotate;

[0008] A number of fixture mechanisms, including a base provided on a workbench, a placement table provided on the base and used for placing workpieces to be processed, and a pressing assembly provided on the base and used for pressing the workpieces.

[0009] A cooling mechanism, including a coolant tank and a cooler for cooling the coolant in the coolant tank, and the cooling mechanism is used for cooling the polishing grinding wheel, the main shaft and the fixture mechanism.

[0010] Furthermore, the driving assembly includes a speed reducer, a driving wheel, a synchronous belt, two idler wheels, two driven wheels and two eccentric shafts provided in the main shaft. The output shaft of the speed reducer is coaxially connected to the driving wheel. The driving wheel is connected to the two idler wheels and the two driven wheels through the synchronous belt. The two driven wheels are respectively connected to the two eccentric shafts. The machine frame is provided with a tray and a support plate. The main shaft is installed on the tray, and the eccentric shaft is installed between the tray and the support plate.

[0011] Furthermore, a swing distance scale and a swing distance dial are provided on the eccentric shaft to adjust the speed and distance of the planetary motion of the main shaft and are fixed by a locking bolt.

[0012] Furthermore, a grinding wheel protective cover is fixedly connected between the outside of the polishing grinding wheel and the tray. A coolant inlet and a sewage outlet communicating with the coolant tank are provided on the side of the grinding wheel protective cover. A coolant ring spray disc is provided below the polishing grinding wheel, and the coolant ring spray disc communicates with the coolant inlet.

[0013] Furthermore, a universal head is provided above the front end of the placement table. The universal head includes two rotating shafts, and the two rotating shafts are in a cross shape and parallel to the processing surface of the polishing grinding wheel.

[0014] Furthermore, a driving shaft is provided on the universal head and is arranged in the vertical direction of the workpiece processing surface.

[0015] Furthermore, a liquid inlet and a liquid outlet communicating with the coolant tank are provided above the universal head.

[0016] Furthermore, the base includes a base plate and a flipping arm rotatable on the base plate. The placement table is provided at the fixed end of the flipping arm, and the pressing assembly is provided in the middle of the folding arm.

[0017] Furthermore, a limit block is provided at one end of the base plate away from the placement table.

[0018] Furthermore, a control mechanism is further included. The control mechanism includes a temperature sensor and a machine tool electric control cabinet. The temperature sensor is provided on the workbench and close to the polishing grinding wheel. The machine tool electric control cabinet is electrically connected to the temperature sensor and the cooling tank to realize the adaptive control of the cooler through the machine tool electric control cabinet according to the detection data fed back by the temperature sensor received.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the mirror polishing machine of the utility model, by setting a cooling mechanism, the cooling machine cools the coolant in the coolant tank, and then the coolant tank transports the coolant to the polishing grinding wheel and the fixture mechanism for cooling, effectively reducing a large amount of heat generated by the friction between the polishing grinding wheel and the PCD composite sheet during the polishing of the workpiece by the polishing grinding wheel and the fixture mechanism, ensuring a good cooling effect, and thus improving the polishing quality.

[0021] In the mirror polishing machine of the utility model, by setting a coolant ring spray disc, ring spray cooling is achieved at the bottom of the polishing grinding wheel, making the cooling effect more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the mirror polishing machine according to an embodiment of the utility model;

[0023] Figure 2 It is a front view structural schematic diagram of the polishing mechanism in the mirror polishing machine according to an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the transmission structure of the driving wheel, the idler wheel and the driven wheel in the mirror polishing machine according to an embodiment of the utility model;

[0025] Figure 4 It is a side view structural schematic diagram of the polishing mechanism in the mirror polishing machine according to an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the fixture mechanism in the mirror polishing machine according to an embodiment of the utility model;

[0027] Figure 6 It is an assembly schematic diagram of the sand repairer in the mirror polishing machine according to an embodiment of the utility model;

[0028] Explanation of the reference numerals in the drawings:

[0029] 1. Frame; 101. Workbench; 102. Tray; 103. Support plate; 104. Welding frame; 105. Hoisting column; 106. Adjustable floor feet;

[0030] 2. Polishing mechanism; 201. Polishing grinding wheel; 202. Main shaft; 203. Reducer; 204. Driving wheel; 205. Synchronous belt; 206. Idler wheel; 207. Driven wheel; 208. Eccentric shaft; 209. Swing distance scale; 210. Swing distance dial; 211. Locking bolt; 212. Locking mechanism;

[0031] 3. Fixture mechanism; 301. Base; 302. Tipping arm; 303. Placement table; 304. Universal joint; 305. Drive shaft; 306. Liquid inlet; 307. Liquid outlet; 308. Limit block; 309. Quick clamping device; 310. Pressure regulating device; 311. Handle

[0032] 4. Cooling mechanism; 401. Coolant tank; 402. Cooler; 403. Grinding wheel guard; 404. Coolant inlet; 405. Drain port; 406. Coolant ring spray disc

[0033] 5. Control mechanism; 501. Temperature sensor; 502. Machine tool electric control cabinet; 503. Control panel

[0034] 6. Grinding wheel dresser

[0035] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0036] In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer, the technical solutions in the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, and are not used to limit the present utility model.

[0037] In the description of the present utility model, it should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0038] Such as Figure 1-2As shown in the figure, an embodiment of the present utility model provides a mirror polishing machine, which includes a frame 1, a polishing mechanism 2, a plurality of fixture mechanisms 3 and a cooling mechanism 4. Among them, the frame 1 has a workbench 101, and the polishing mechanism 2 and a plurality of fixture mechanisms 3 are both arranged on the workbench 101. The polishing mechanism 2 includes a polishing grinding wheel 201 rotatably arranged on the workbench 101, a main shaft 202 arranged on the frame 1, and a driving component. The driving component is arranged inside the main shaft 202 and is used to drive the polishing grinding wheel 201 to rotate. The plurality of fixture mechanisms 3 include a base arranged on the workbench 101, a placing table 303 arranged on the base and used for placing the workpiece to be processed, and a pressing component arranged on the base and used for pressing the workpiece. The cooling mechanism 4 includes a coolant tank 401 and a cooler 402 used for cooling the coolant in the coolant tank 401. The cooling mechanism 4 is used to cool the polishing grinding wheel 201, the main shaft 202 and the fixture mechanism 3.

[0039] In the embodiment of the present utility model, by setting the cooling mechanism 4, the cooler 402 cools the coolant in the coolant tank 401, and then the coolant tank 401 conveys the coolant to the polishing grinding wheel 201, the main shaft 202 and the fixture mechanism 3 for cooling, effectively reducing the large amount of heat generated by the friction between the polishing grinding wheel 201 and the PCD composite sheet during the polishing of the workpiece by the polishing grinding wheel 201, the main shaft 202 and the fixture mechanism 3, ensuring a good cooling effect, and thus improving the polishing quality.

[0040] Specifically, in the embodiment of the present utility model, a plurality of fixture mechanisms 3 are annularly distributed around the center of the polishing grinding wheel 201. The specific number thereof can be determined by the diameter of the polishing grinding wheel 201 and the processing requirements. At the same time, a plurality of fixture mechanisms 3 can fix multiple workpieces, so that the polishing machine can process multiple workpieces simultaneously in each operation, greatly improving the processing efficiency.

[0041] It should be noted that in the embodiment of the present utility model, the pressing component includes a quick pressing device 309 and a pressure adjusting device 310, which can quickly press the workpiece and accurately adjust the pressure according to different processing requirements. The above quick pressing device 309 and pressure adjusting device 310 are both conventional devices in the art. Since the present utility model does not make any improvements thereto, the specific structures and working methods thereof will not be described in detail here.

[0042] Such as Figure 2-3As shown in the figure, in the embodiment of the present utility model, the driving assembly includes a speed reducer 203, a driving wheel 204, a synchronous belt 205, two idler wheels 206, two driven wheels 207 and two eccentric shafts 208 arranged in the main shaft 202. The output shaft of the speed reducer 203 is coaxially connected to the driving wheel 204. The driving wheel 204 is connected to the two idler wheels 206 and the two driven wheels 207 through the synchronous belt 205. The two driven wheels 207 are respectively connected to the two eccentric shafts 208. The frame 1 is provided with a tray 102 and a supporting plate 103. The main shaft 202 is installed on the tray 102. The eccentric shaft 208 is installed between the tray 102 and the supporting plate 103 and is drivingly connected. When the main shaft 202 is processing, the main shaft 202 itself makes a planetary motion relative to the center of the workbench 101. Specifically, the speed reducer 203 drives the driving wheel 204 to rotate, and through the cooperation of the synchronous belt 205 and the two idler wheels 206, the two driven wheels 207 are driven to rotate at the same time. The two driven wheels 207 drive the two eccentric shafts 208 to make a planetary motion, thereby driving the wheel shaft of the polishing grinding wheel 201 to make a planetary motion, so that the polishing grinding wheel 201 can stably grind and polish the polycrystalline diamond composite sheet, effectively ensuring the grinding and polishing quality of the polycrystalline diamond composite sheet.

[0043] Specifically, three bosses are provided above the supporting plate 103. The positions of the bosses are annularly distributed with respect to the center of the supporting plate 103. The upper surfaces of the bosses are flat, and the three planes are at the same height. Lower support plates and wear-resistant plates are provided above the three bosses. The wear-resistant plates are fixedly connected to the tray 102 by bolts.

[0044] Based on the above solution, as Figure 2 shown in the figure, in the embodiment of the present utility model, a swing distance scale 209 and a swing distance dial 210 are provided on the eccentric shaft 208 to adjust the speed and distance of the planetary motion of the main shaft 202, and are fixed by a locking bolt 211. Before adjusting the speed and distance of the main shaft 202, the locking mechanism 212 needs to be locked to ensure the synchronous operation of the two eccentric shafts 208. Specifically, the locking mechanism 212 is a conventional device in the art. That is, when the speed and distance of the main shaft 202 are adjusted, the two locking plates (acting as positioning pins) in the locking mechanism 212 can act on the positioning sleeves of the two eccentric shafts 208 at the same time. After fixing and adjusting, the locking plates are moved away, and the two eccentric shafts 208 still maintain synchronous operation.

[0045] Specifically, as Figure 2 and Figure 4As shown in the figure, in the embodiment of the present utility model, a grinding wheel protection cover 403 is fixedly connected to the outside of the polishing grinding wheel 201 and the tray 102. A coolant inlet 404 and a sewage outlet 405 communicating with the coolant tank 401 are provided on the side of the grinding wheel protection cover 403. The sewage outlet 405 prevents equipment failures caused by the accumulation of oil stains. A coolant ring spray disc 406 is provided below the polishing grinding wheel 201. The coolant ring spray disc 406 is communicated with the coolant inlet 404, and the polishing grinding wheel 201 is cooled by the way of bottom ring spraying, so that the cooling effect is more uniform. Among them, the coolant ring spray disc 406 and the main shaft 202 are fixedly connected by bolts.

[0046] Based on the above solution, as Figure 5 shown in the figure, in the embodiment of the present utility model, a universal head 304 is provided above the front end of the placement table 303. The universal head 304 includes two rotating shafts, and the two rotating shafts are in a cross shape and parallel to the processing surface of the polishing grinding wheel 201, so as to ensure that the workpiece processing surface and the polishing grinding wheel 201 processing surface can be closely attached during the processing process.

[0047] Specifically, as Figure 5 shown in the figure, in the embodiment of the present utility model, the universal head 304 is provided with a drive shaft 305. The drive shaft 305 is arranged in the vertical direction of the workpiece processing surface to realize the self-rotation of the workpiece during the processing process.

[0048] Specifically, as Figure 5 shown in the figure, in the embodiment of the present utility model, a liquid inlet 306 and a liquid outlet 307 communicating with the coolant tank 401 are provided above the universal head 304, which is convenient for the circulating cooling of the coolant. At the same time, it can ensure that the workpiece is in a relatively stable state during the processing process, thereby improving the workpiece processing quality.

[0049] Specifically, as Figure 5 shown in the figure, in the embodiment of the present utility model, the base includes a base 301 and a turning arm 302 that rotates on the base 301. The placement table 303 is arranged at the fixed end of the turning arm 302, and the pressing assembly is arranged in the middle of the folding arm. Specifically, the turning arm 302 is rotationally connected to the base 301 through a rotating shaft. At the same time, in order to facilitate driving the turning arm 302 to turn around this rotating shaft, a handle 311 is arranged on the side of the turning arm 302 away from the rotating end.

[0050] Based on the above solution, as Figure 5 shown in the figure, in the embodiment of the present utility model, a limit block 308 is provided at one end of the base 301 away from the placement table 303. The limit block 308 is convenient for checking the processing effect and loading and unloading the workpiece, and can also prevent the turning arm 302 from colliding with the workbench 101.

[0051] Based on the above solution, as Figure 1As shown in the figure, in an embodiment of the present utility model, a control mechanism 5 is further included. The control mechanism 5 includes a temperature sensor 501 and a machine tool electric control cabinet 502. The temperature sensor 501 is arranged on the workbench 101 and is close to the polishing grinding wheel 201, and is used for real-time monitoring of the temperature of the working polishing grinding wheel 201. The machine tool electric control cabinet 502 is electrically connected to the temperature sensor 501 and the cooling tank, so as to realize the adaptive control of the cooling machine 402 through the machine tool electric control cabinet 502 according to the detection data fed back by the received temperature sensor 501, that is, to control the temperature of the coolant through the cooling machine 402, achieve the control of the temperature change during the processing of the polishing grinding wheel 201, and make it in a relatively stable state. At the same time, a control panel 503 is arranged at the front end of the machine tool electric control cabinet 502, and parameters can be adjusted through the control panel 503.

[0052] Based on the above solution, as Figure 6 shown, in an embodiment of the present utility model, the mirror polishing machine further includes a grinding wheel dresser 6 for quickly leveling the polishing grinding wheel 201. The grinding wheel dresser 6 can share the position with the tooling fixture and is fixed on the upper surface of the workbench 101. Specifically, two drive shafts 305 are arranged on the grinding wheel dresser 6 in the direction perpendicular to the polishing grinding wheel 201. The two drive shafts 305 are parallel to each other. One of them is a feed drive shaft 305 for the grinding wheel feed of the grinding wheel dresser 6; the other is for the self-rotation of the grinding wheel of the grinding wheel dresser 6. A dressing grinding wheel is installed at one end of the self-rotation drive shaft 305 of the grinding wheel dresser 6 close to the polishing grinding wheel 201. The polishing grinding wheel 201 can be dressed in time through the drive linear shaft and the rotating shaft, effectively reducing the dressing time, thereby improving the production efficiency.

[0053] Specifically, as Figure 1-2 shown, in an embodiment of the present utility model, the frame 1 is a combination of a steel frame and a cast iron part. Its main body is a welded frame 104, which takes into account the overall weight while ensuring the strength. The welded frame 104 is rectangular, and the workbench 101 is arranged above. The workbench 101 is fixedly connected to the welded frame 104 through bolts. Adjustable floor feet 106 are installed at the bottom of the welded frame 104. The overall structure is simple, stable and highly adaptable. The support plate 103 is fixedly connected to the welded frame 104 through four lifting columns 105.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A mirror polishing machine, characterized in that, Comprising: A frame having a workbench; A polishing mechanism including a polishing grinding wheel rotatably arranged on the workbench, a main shaft arranged on the frame, and a driving assembly. The driving assembly is arranged inside the main shaft and is used to drive the polishing grinding wheel to rotate; A plurality of fixture mechanisms including a base arranged on the workbench, a placement table arranged on the base and used for placing the workpiece to be processed, and a pressing assembly arranged on the base and used for pressing the workpiece; A cooling mechanism including a coolant tank and a cooler for cooling the coolant in the coolant tank. The cooling mechanism is used to cool the polishing grinding wheel, the main shaft, and the fixture mechanism.

2. The mirror polishing machine according to claim 1, characterized in that, The driving assembly includes a speed reducer, a driving wheel, a synchronous belt, two idler wheels, two driven wheels, and two eccentric shafts arranged inside the main shaft. The output shaft of the speed reducer is coaxially connected to the driving wheel. The driving wheel is connected to the two idler wheels and the two driven wheels through the synchronous belt. The two driven wheels are respectively connected to the two eccentric shafts. The frame is provided with a tray and a support plate. The main shaft is installed on the tray, and the eccentric shaft is installed between the tray and the support plate.

3. A mirror polishing machine according to claim 2, characterized in that, The eccentric shaft is provided with a swing distance scale and a swing distance dial for adjusting the speed and distance of the planetary motion of the main shaft and fixed by a locking bolt.

4. A mirror polishing machine according to claim 2, wherein, A grinding wheel protective cover is fixedly connected between the outside of the polishing grinding wheel and the tray. The side of the grinding wheel protective cover is provided with a coolant inlet and a sewage outlet communicating with the coolant tank. A coolant ring spray disc is arranged below the polishing grinding wheel, and the coolant ring spray disc communicates with the coolant inlet.

5. A mirror polishing machine according to claim 1, characterized in that, Above the front end of the placement table, there is a universal joint head. The universal joint head includes two rotating shafts, and the two rotating shafts are in a cross shape and parallel to the processing surface of the polishing grinding wheel.

6. The mirror polishing machine according to claim 5, characterized in that, The universal joint head is provided with a driving shaft arranged in the vertical direction of the workpiece processing surface.

7. A mirror polishing machine according to claim 5, characterized in that, Above the universal joint head, there are a liquid inlet and a liquid outlet communicating with the coolant tank.

8. A mirror polishing machine as claimed in claim 1, wherein, The base includes a base plate and a flipping arm rotatable on the base plate. The placement table is arranged at the fixed end of the flipping arm, and the pressing assembly is arranged in the middle of the folding arm.

9. A mirror polishing machine according to claim 8, wherein, A limiting block is arranged at one end of the base plate away from the placement table.

10. A mirror polishing machine according to any one of claims 1-9, characterized in that, It further includes a control mechanism. The control mechanism includes a temperature sensor and a machine tool electric control cabinet. The temperature sensor is arranged on the workbench and close to the polishing grinding wheel. The machine tool electric control cabinet is electrically connected to the temperature sensor and the cooling tank to realize the adaptive control of the cooler through the machine tool electric control cabinet according to the detection data fed back by the temperature sensor received.

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