CN218427489U - Water bores system of polishing that grinds - Google Patents

Abstract

The utility model discloses a water bores system of polishing that grinds belongs to water and bores processing technology field. The system comprises a rack, two clamp rotating structures and two polishing production lines, wherein the two polishing production lines are arranged in a reverse mode and form an annular shape through the two clamp rotating structures; polishing production line includes by preceding to the first empty station that sets gradually after to, go up pearl base station, go up the adhesive powder station, unload and bore the station, blow water and heating station, grind and throw station and the empty station of second, first empty station is located two anchor clamps revolution mechanic's left side or right side respectively with the empty station of second, heating device with blow the water installation and all locate to blow water and heating station on, blow the water installation and be located heating device's front side, the end of buckling is located the water receiving tank directly over, the jet head is located between the preceding cell wall of end of buckling and water receiving tank.

Description

Water bores system of polishing that grinds

Technical Field

The utility model belongs to the technical field of the water bores processing, in particular to water bores system of polishing.

Background

A rhinestone is a very important accessory for ornaments and clothes, which is generally processed by a polishing machine. The processing process of the rhinestone can be divided into rubber powder feeding, bead blank feeding, grinding and polishing, water blowing, heating, drill unloading and the like, two production lines are reversely arranged on the front side and the rear side of the polishing machine, and the processing sequence of one side is usually rubber powder feeding, bead blank feeding, grinding and polishing, water blowing, heating and drill unloading. Specifically, as shown in fig. 1, the conventional rhinestone grinding and polishing system includes a frame arranged in a front-back direction, two jig rotating structures at two ends of the frame, two polishing lines at left and right sides of the frame, and the like, wherein the two polishing lines are arranged in a reverse direction and form an annular shape by the two jig rotating structures. The polishing production line is sequentially provided with a powder coating station 12, a bead blank coating station 11, a first empty station 10, a rough grinding station 15, a fine grinding station 16, a rough polishing station 17, a fine polishing station 18, a water blowing station 22, a heating station 23, a drill unloading station 13 and the like from front to back (along the conveying direction of a clamp), the powder coating station 12 on one polishing production line and the drill unloading station 13 on the other polishing production line are respectively positioned on the left side and the right side of a clamp rotating structure at the corresponding end, a powder coating device is arranged on the powder coating station 12, a bead blank coating device is arranged on the bead blank coating station 11, the first empty station 10 is empty, drum grinding and polishing devices are arranged on the rough grinding station 15, the fine grinding station 16, the rough polishing station 17 and the fine polishing station 18, a water blowing device is arranged on the water blowing station 22, a heating device is arranged on the heating station 23, and a drill unloading device is arranged on the drill unloading station 13. The structure of a conventional rhinestone grinding and polishing system is similar to that of the patent with the application number of CN201420548285.8, and each device can also be referred to the patent. The heating device comprises a high-frequency heater, a heating copper pipe and the like, the heating copper pipe is arranged along the front and back direction, one end of the heating copper pipe is bent downwards to form a bent end, and the other end of the heating copper pipe is electrically connected with the high-frequency heater. The water blowing device comprises a water receiving tank and an air spraying head and the like above the water receiving tank, the water receiving tank is located below the clamp, and the air spraying head is arranged towards a clamp needle of the clamp.

The applicant finds at least the following two problems when processing a rhinestone by using the existing rhinestone grinding and polishing system:

(1) The left side and the right side of the clamp rotating structure are respectively provided with the upper sizing station and the drill unloading station, and the clamp rotating structure is required to be matched with the upper sizing station and the drill unloading station, so that the switching speed of the clamp rotating structure cannot be very high, the processing time of the whole polishing production line on the water drill is further limited, and the processing time of the water drill is about 2.5s generally.

(2) The rubber powder feeding station needs the clamp to reach a certain temperature, in the prior art, the heated clamp needs to pass through a drill unloading station (the drill unloading can be realized at high temperature) and a clamp rotating structure, and the clamp rotating structure can prolong the time of heating to the rubber powder, so that the clamp is generally heated to about 1100 ℃ to ensure the rubber powder feeding effect, and the energy consumption is high.

Disclosure of Invention

In order to solve the above problems, the embodiment of the present invention provides a rhinestone grinding and polishing system, which sets both side stations of a fixture rotating structure empty, so as to make the rotating speed of the fixture rotating structure faster; meanwhile, the sequence of each station is adjusted, the heating station can reach the upper rubber powder station without passing through a fixture rotating structure, so that the time difference between heating to the upper rubber powder is reduced, and the temperature for heating the fixture at the heating station can be reduced. The technical scheme is as follows:

the embodiment of the utility model provides a water bores system of grinding and throwing, this system includes along two anchor clamps rotating-structure and two polishing production line of the frame 1 left and right sides of frame 1 of the frame 1 that sets up of fore-and-aft direction, two polishing production lines reverse and set up and form the annular through two anchor clamps rotating-structure, the polishing production line includes heating device and blows the water installation, heating device includes high frequency heater and heating copper pipe 2, the one end of heating copper pipe 2 is buckled downwards and is formed bending end 4, blow the water installation including water receiving tank 5 and the jet head 6 above it; polishing production line includes by preceding empty station 10, last pearl base station 11, rubberizing powder station 12 that sets gradually after to, unload brill station 13, blow water and heating station 14, grind and throw station and the empty station 19 of second, the empty station 10 of first empty station and the empty station 19 of second are located two anchor clamps revolution mechanic's left side or right side respectively, heating device with blow the water installation and all locate blow water and heating station 14 on, blow the water installation and be located heating device's front side, bend end 4 and be located water receiving tank 5 directly over, jet-propelled head 6 is located between the preceding cell wall of bend end 4 and water receiving tank 5.

Wherein, the embodiment of the utility model provides an in jet head 6 perpendicular to anchor clamps 3, it is located anchor clamps 3 and keeps away from one side of frame 1, and it is just to the anchor clamps needle of anchor clamps 3, and it is all adjacent with the preceding cell wall of buckling end 4 and water receiving tank 5.

Specifically, the embodiment of the utility model provides an in air jet 6 including around two universal bamboo joint pipes that set up side by side, two universal bamboo joint pipes pass through support 7 to be fixed in the inboard of the preceding cell wall of water receiving tank 5.

Preferably, three guide wheels 9 matched with the dovetail grooves of the fixture 3 are arranged in parallel in front and at the back of the upper part of the water blowing and heating station 14 in the embodiment of the invention, the guide wheels 9 are vertically arranged, the guide wheel 9 in the middle can be driven by a turning cylinder to turn upwards to take down the fixture 3, and the two guide wheels 9 on the two sides are respectively positioned in front of and behind the fixture 3; when the overturning cylinder extends, the guide wheel 9 in the middle part abuts against the dovetail groove; when the overturning cylinder contracts, the guide wheel 9 in the middle is overturned upwards; the heating device further comprises two lifting cylinders 20 which are arranged side by side in the front and back direction, the two lifting cylinders 20 are both positioned behind the water receiving tank 5, the lifting cylinders 20 are vertically arranged, and the upper ends of telescopic rods of the lifting cylinders 20 are fixedly connected with the lower side of the heating copper pipe 2 through insulating blocks 21; when the lifting cylinder 20 extends, the heating copper pipe 2 is positioned at the position of the clamp needle; when the lifting cylinder 20 contracts, the heating copper pipe 2 is positioned below the clamp 3; the two lifting cylinders 20 and one overturning cylinder are synchronously driven.

Specifically, the front wall of the water receiving tank 5 in the embodiment of the present invention is higher than the heating copper pipe 2, and a notch for the fixture 3 to pass through is provided thereon, and the distance between the notch and the bending end 4 is less than 4cm; the rear groove wall of the water receiving groove 5 is lower than the heating copper pipe 2 at the lower position, and the distance between the rear groove wall and the bending end 4 is larger than 8cm.

Furthermore, a U-shaped groove 8 matched with the notch is arranged on the notch and positioned on the outer side of the front groove wall of the water receiving groove 5 in the embodiment of the invention; the U-shaped groove 8 is arranged in the front-back direction, is obliquely arranged downwards from the grinding and polishing station to the water receiving groove 5, is positioned under the clamp 3, and is respectively positioned at the left side and the right side of the clamp 3.

Specifically, the embodiment of the utility model provides an in the station is thrown in the mill include by preceding coarse grinding station 15, the fine grinding station 16 that sets gradually after to, throw station 17 roughly and throw station 18 finely, coarse grinding station 15, fine grinding station 16, throw station 17 roughly and throw station 18 a position finely and all be equipped with the cylinder and grind the throwing device.

The utility model provides a water bores grinding and polishing system's thinking is: and (3) emptying the heating station, adjusting the heating device of the heating station to the water blowing station, adding one original empty station (reserved for a system so as to be used for adding and adjusting the station) to form two empty stations, and adjusting the two empty stations to two ends of the polishing production line. The two sides of the fixture rotating structure are both idle stations, and the fixture rotating structure does not need to be matched with other devices (speed matching and/or action matching (lifting if needed)) and only needs to rotate 180 degrees, so that the speed of the fixture rotating structure can be increased, the speed of the whole production line is increased, and the machining time of the water drill can be reduced to about 2.0s from about 2.5s by increasing the speed of the fixture rotating structure. The positions of all the stations are adjusted, the water blowing station, the heating station, the drill unloading station and the powder gluing station are positioned on the same straight line, the flat rotation of a clamp adding rotating structure is not needed, the time for heating the rubber powder is shorter, the clamp is heated to 900-950 ℃ by a heating device (150-200 ℃ can be reduced compared with the prior art), and the energy consumption can be reduced.

Drawings

FIG. 1 is a layout diagram of stations in a conventional rhinestone grinding and polishing system;

fig. 2 is a layout diagram of stations in the rhinestone grinding and polishing system according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a combination of a heating device and a water blowing device.

In the figure: the device comprises a machine frame 1, a heating copper pipe 2, a clamp 3, a bending end 4, a water receiving groove 5, a gas spraying head 6, a support 7, a U-shaped groove 8, a guide wheel 9, a first idle station 10, a bead blank loading station 11, a powder coating station 12, a drill unloading station 13, a water blowing and heating station 14, a coarse grinding station 15, a fine grinding station 16, a coarse polishing station 17, a fine polishing station 18, a second idle station 19, a lifting cylinder 20, an insulating block 21, a water blowing station 22 and a heating station 23.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Referring to fig. 2-3, embodiment 1 provides a rhinestone grinding and polishing system, which includes a frame 1 arranged in a front-back direction, two fixture rotating structures (which can rotate 180 ° and send fixtures to a polishing production line on the other side) at two ends of the frame 1, two polishing production lines on the left and right sides of the frame 1, and the like, wherein a fixture conveying structure for enabling the fixtures to move in the left-right direction is arranged on the upper portion of the frame and above the polishing production lines in the left-right direction, the fixture conveying structure is matched with the fixture rotating structures, and the two polishing production lines are arranged in a reverse direction and form an annular shape through the two fixture rotating structures.

The polishing production line comprises a heating device, a water blowing device, a sizing powder device, a bead blank feeding device, a drill discharging device, a roller grinding and polishing device and the like, wherein the sizing powder device, the bead blank feeding device, the drill discharging device and the roller grinding and polishing device are all conventional structures, and the specific structures can be described in application No. CN 201420548285.8. Wherein, the heating device comprises a high-frequency heater, a heating copper pipe 2 and the like; the heating copper pipe 2 is arranged along the front-back direction, one end of the heating copper pipe is bent downwards (specifically, bent in an arc shape) to form a bent end 4, and the other end of the heating copper pipe is connected with the high-frequency heater; more specifically, the heating copper pipe 2 is a U-shaped structure arranged in the front-back direction, and two arms thereof are arranged side by side at the left and right sides of the rhinestone clamp respectively. One end (specifically, the front end) of the heating copper pipe 2 close to the polishing station is a bending part of a U-shaped structure and is bent downwards (specifically, the heating copper pipe is bent to be vertical in an arc shape) to form a bending end 4, and the other end (specifically, the rear end) of the heating copper pipe is electrically connected with the high-frequency heater. Wherein, the water blowing device comprises a water receiving tank 5, an air nozzle 6 above the water receiving tank and the like. The water receiving tank 5 is a rectangular tank arranged in the front-back direction, the bottom of the water receiving tank is communicated with the drainage structure through a pipeline, the water receiving tank is located right below the clamp and used for receiving water falling from the clamp and blown down by the air nozzle 6. Wherein, the air nozzle 6 is perpendicular to the clamp 3, is positioned at one side of the clamp 3 far away from the frame 1, is opposite to the clamp needle of the clamp 3, and is connected with the compressed air supply structure through a pipeline.

This patent improves on current water bores the basis of grinding and polishing system, improves as follows: the original heating station 23 is not used as a second empty station 19, the water blowing station 22 and the water blowing device on the water blowing station are reserved, the heating device is adjusted to the water blowing station 22, and then the water blowing station 22 is adjusted to the water blowing and heating station 14. Since the empty positions of the original water blowing stations 22 are not too many, the heating device and the water blowing device need to be slightly adjusted adaptively. The system of the improved rhinestone grinding and polishing system is as follows: the polishing production line comprises a first idle station 10, a bead blank feeding station 11, a powder coating station 12, a drill unloading station 13, a water blowing and heating station 14, a grinding and polishing station and a second idle station 19 which are sequentially arranged from front to back (the input direction of the clamp is taken as the front, the output direction is taken as the back, and the back is the same in the embodiment). If only seen from the spatial orientation, a first idle station 10, a bead blank loading station 11, a powder applying station 12, a drill unloading station 13, a water blowing and heating station 14, a grinding and polishing station and a second idle station 19 are arranged on one side (left side or right side) of the frame 1 from front to back; the other side of the frame 1 is provided with a second idle station 19, a grinding and polishing station, a water blowing and heating station 14, a drill unloading station 13, a powder applying station 12, a bead blank loading station 11 and a first idle station 10 in sequence from front to back. The first idle station 10 and the second idle station 19 are respectively positioned at the left side or the right side of the two clamp rotating structures; specifically, the left side of the fixture rotating structure at the front end is a first idle station 10, and the right side is a second idle station 19; the left side of the clamp rotating structure at the rear end is a second idle station 19, and the right side is a first idle station 10. The both sides of anchor clamps revolution mechanic are idle work position promptly, and then provide the condition for improving anchor clamps revolution mechanic's rotational speed. Specifically, the heating device and the water blowing device are arranged on a water blowing and heating station 14, the first empty station 10 and the second empty station 19 are both empty, a bead blank feeding device is arranged at a bead blank feeding station 11, a powder feeding device is arranged at a powder feeding station 12, a drill unloading device is arranged at a drill unloading station 13, and a grinding and polishing device is arranged at a grinding and polishing station. Wherein, the water blowing device is positioned at the front side (the side close to the grinding and polishing station) of the heating device; furthermore, the water blowing device is positioned at the adjacent rear part of the grinding and polishing station; the bending end 4 (the front end of the heating copper pipe 2) is positioned right above the water receiving groove 5, and the air nozzle 6 is positioned between the bending end 4 and the front groove wall of the water receiving groove 5. Further, the air nozzle 6 is closer to the front wall of the water receiving tank 5 than to the rear wall of the water receiving tank 5. Furthermore, due to the position relation, the air nozzle 6 is adjacent to the front groove walls of the bending end 4 and the water receiving groove 5.

Specifically, referring to fig. 3, the air nozzle 6 in the embodiment of the present invention includes two universal bamboo joint pipes disposed side by side in front and back, the two universal bamboo joint pipes are fixed at the inner side of the front groove wall of the water receiving tank 5 through the bracket 7, and the nozzles of the universal bamboo joint pipes face the fixture needle and are connected with the compressed air supply structure. Specifically, the bracket 7 is a rectangular plate arranged in the front-back direction, and the front end of the rectangular plate is fixed on the inner side of the front groove wall of the water receiving groove 5 and is positioned on the outer side of the notch. The universal bamboo joint pipe is fixed on the upper side of the bracket 7.

Specifically, referring to fig. 3, the front slot wall of the water receiving slot 5 in the embodiment of the present invention is higher than the heating copper pipe 2, and a notch (specifically, a vertically disposed rectangular opening) for the fixture 3 to pass through is provided thereon, and the distance between the front slot wall and the bending end 4 is less than 4cm so as to be closer to the rear slot wall of the water receiving slot 5 of the bending end 4, and is lower than the heating copper pipe 2, and the distance between the front slot wall and the bending end 4 is greater than 8cm.

Further, referring to fig. 3, a U-shaped groove 8 is provided on the notch and outside the front wall of the water receiving tank 5 in the embodiment of the present invention. The U-shaped groove 8 is arranged in the front-back direction, has a shape similar to that of the notch, is arranged obliquely downward from the polishing station to the water receiving groove 5 (specifically, obliquely downward from front to back to guide water to the water receiving groove 5), is located right below the fixture 3, and has left and right groove walls located on the left and right sides of the fixture 3, respectively, and is used for receiving water sprinkled on the fixture 3.

In this embodiment, "first" and "second" only have a distinguishing function, and have no other special meaning.

Example 2

In fact, the fixture 3 should be removable from the original water blowing station 22 to detect whether the polishing process is in place through a magnifying glass (e.g. a 40-time magnifying glass). Namely, three guide wheels 9 matched with the dovetail grooves of the fixture 3 are arranged in front and at the back of the upper part of the rack 1 corresponding to the original water blowing station 22 (the adjusted water blowing and heating station 14). The guide wheel 9 is vertically arranged, a gap for a dovetail groove of the clamp to pass through is formed between the guide wheel and the rack 1, and the upper end of a rotating shaft of the guide wheel is fixedly connected with the lower side of a corresponding mounting plate (which is fixedly arranged on the rack 1 in the left-right direction or rotatably arranged). The guide wheel 9 in the middle part can be driven by a turnover cylinder (hinged or fixed on the frame 1 and connected with a mounting plate of the guide wheel 9 at the same time through a connecting rod and a swing arm) to turn upwards so as to take down the clamp 3; the two guide wheels 9 on the two sides are respectively positioned in front of and behind the clamp 3, and are respectively positioned in front of and behind the water blowing and heating station 14. When the overturning cylinder extends, the guide wheel 9 in the middle part is propped against the dovetail groove. When the turning cylinder contracts, the guide wheel 9 at the middle part turns upwards so as to take down the clamp.

Because the heating structure is arranged on the original water blowing station 22, only the guide wheel 9 in the middle is turned upwards and the clamp 3 can not be taken down, and the clamp needle at the bottom of the clamp 3 is also positioned between the two arms of the heating copper pipe 2. Therefore, the heating device needs to be adjusted, and the heating device further comprises two lifting cylinders 20 arranged side by side in front and back, wherein the lifting cylinders 20 are located below the heating copper pipe 2, and the cylinder bodies of the lifting cylinders are fixed on the frame 1. Two lift cylinders 20 all are located the rear of water receiving tank 5, and lift cylinder 20 vertical setting and the upper end of its telescopic link pass through the downside fixed connection of insulating block 21 with heating copper pipe 2. The insulating block 21 is a plastic block arranged in the left-right direction, and the joint of the insulating block and the heating copper pipe 2 is required not to influence the operation of the clamp 3. When the lifting cylinder 20 extends, the heating copper pipe 2 is positioned at the position of the clamp needle. When the lifting cylinder 20 contracts, the heating copper pipe 2 is positioned below the clamp 3, and the heating copper pipe 2 is positioned at a low position at the moment. Furthermore, the rear groove wall of the water receiving groove 5 is lower than the heating copper pipe 2 at a lower position so as to ensure that the heating copper pipe 2 can move up and down. The two lifting cylinders 20 and the one overturning cylinder are driven synchronously and can be controlled by the same air supply valve, and the two lifting cylinders 20 and the one overturning cylinder shrink simultaneously (in cooperation with clamping rods of the rotary clamp conveying structure) to take out the clamp 3.

Example 3

In the prior art, a grinding and polishing station is composed of a plurality of stations. This patent is similar with prior art, adopts two modes processing water bores of polishing of grinding. Correspondingly, the grinding and polishing station in this embodiment includes a rough grinding station 15, a fine grinding station 16, a rough polishing station 17, and a fine polishing station 18, which are sequentially arranged from front to back, and drum grinding and polishing devices are respectively disposed at the rough grinding station 15, the fine grinding station 16, the rough polishing station 17, and the fine polishing station 18. The rollers of the roller grinding and polishing device on each station are different. Of course, each station in the grinding and polishing stations can be adjusted according to the requirement (if empty stations exist, 2-grinding and 3-polishing can be adopted according to the requirement).

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (7)

1. A rhinestone grinding and polishing system comprises a rack (1) arranged in the front-back direction, two clamp rotating structures at two ends of the rack (1) and two polishing production lines at the left side and the right side of the rack (1), wherein the two polishing production lines are arranged in the reverse direction and form an annular shape through the two clamp rotating structures, each polishing production line comprises a heating device and a water blowing device, each heating device comprises a high-frequency heater and a heating copper pipe (2), one end of each heating copper pipe (2) is bent downwards to form a bent end (4), and each water blowing device comprises a water receiving tank (5) and an air jet head (6) above the water receiving tank; the polishing production line is characterized by comprising a first empty station (10), an upper bead blank station (11), an upper sizing powder station (12), a drill unloading station (13), a water blowing and heating station (14), a grinding and polishing station and a second empty station (19) which are sequentially arranged from front to back, wherein the first empty station (10) and the second empty station (19) are respectively positioned on the left side or the right side of two fixture rotating structures, the heating device and the water blowing device are both arranged on the water blowing and heating station (14), the water blowing device is positioned on the front side of the heating device, the bending end (4) is positioned right above the water receiving tank (5), and the air nozzle (6) is positioned between the front groove walls of the bending end (4) and the water receiving tank (5).

2. The rhinestone grinding and polishing system according to claim 1, wherein the air nozzle (6) is perpendicular to the fixture (3), is positioned on the side of the fixture (3) away from the stand (1), is opposite to the fixture needle of the fixture (3), and is adjacent to both the bent end (4) and the front wall of the water receiving tank (5).

3. The rhinestone grinding and polishing system as claimed in claim 1, wherein the air jet head (6) comprises two universal bamboo joint pipes which are arranged side by side in front and back, and the two universal bamboo joint pipes are fixed on the inner side of the front groove wall of the water receiving groove (5) through a bracket (7).

4. The rhinestone grinding and polishing system as claimed in claim 1, wherein three guide wheels (9) matched with dovetail grooves of the clamps (3) are arranged in parallel in front and at the back of the upper portion of the water blowing and heating station (14), the guide wheels (9) are vertically arranged, the guide wheel (9) in the middle can be driven by a turning cylinder to turn upwards to take down the clamps (3), and the two guide wheels (9) on two sides are respectively positioned in front of and behind the clamps (3); when the overturning cylinder extends, the guide wheel (9) in the middle part is propped against the dovetail groove; when the overturning cylinder contracts, the guide wheel (9) in the middle part overturns upwards;

the heating device further comprises two lifting cylinders (20) which are arranged side by side in the front and back, the two lifting cylinders (20) are both positioned behind the water receiving tank (5), the lifting cylinders (20) are vertically arranged, and the upper ends of telescopic rods of the lifting cylinders are fixedly connected with the lower side of the heating copper pipe (2) through insulating blocks (21); when the lifting cylinder (20) extends, the heating copper pipe (2) is positioned at the position of the clamp needle; when the lifting cylinder (20) contracts, the heating copper pipe (2) is positioned below the clamp (3);

two lifting cylinders (20) and a turnover cylinder are synchronously driven.

5. The rhinestone grinding and polishing system as claimed in claim 4, wherein the front wall of the water receiving tank (5) is higher than the heating copper pipe (2), and is provided with a gap for the fixture (3) to pass through, and the distance between the fixture and the bending end (4) is less than 4cm; the rear groove wall of the water receiving groove (5) is lower than the heating copper pipe (2) at the lower position, and the distance between the rear groove wall and the bending end (4) is larger than 8cm.

6. The rhinestone grinding and polishing system as claimed in claim 5, wherein a U-shaped groove (8) matched with the notch is formed in the notch and positioned on the outer side of the front groove wall of the water receiving groove (5); the U-shaped groove (8) is arranged in the front-back direction, is obliquely arranged downwards from the grinding and polishing station to the water receiving groove (5), is positioned under the clamp (3), and is respectively positioned at the left side and the right side of the clamp (3).

7. The rhinestone grinding and polishing system as claimed in claim 1, wherein the grinding and polishing station comprises a rough grinding station (15), a fine grinding station (16), a rough polishing station (17) and a fine polishing station (18) which are sequentially arranged from front to back, and drum grinding and polishing devices are arranged at the rough grinding station (15), the fine grinding station (16), the rough polishing station (17) and the fine polishing station (18).

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