CN114471853A - Grinding machine and grinding disc thereof - Google Patents

Abstract

The embodiment of the application provides a grinding machine and abrasive disc thereof, including disk body and grinding component, grinding component includes the rinding body of being connected with the disk body, and two rinding bodies relative arrangement are in the disk body along the both sides of disk body thickness direction, and the rinding body protrusion in disk body. Because two grinding bodies are arranged oppositely on the two sides of the disc body in the thickness direction of the disc body and protrude out of the disc body, the materials to be ground can be ground on any position of the disc body in the thickness direction of the disc body, and therefore the grinding efficiency is improved.

Description

Grinding machine and grinding disc thereof

Technical Field

The application relates to the technical field of natural asphalt production, in particular to a grinding machine and a grinding disc thereof.

Background

In the production process of natural asphalt, a sand mill is required to grind and/or disperse solid substances, and the grinding efficiency of the existing sand mill is still to be improved.

Disclosure of Invention

In view of the above, it is desirable to provide a grinding machine and a grinding disc thereof, so as to improve the grinding efficiency.

In order to achieve the above object, an aspect of the embodiments of the present application provides an abrasive disk, including:

a tray body; and

the grinding assembly comprises grinding bodies connected with the disc body, the two grinding bodies are oppositely arranged on two sides of the disc body along the thickness direction of the disc body, and the grinding bodies protrude out of the disc body.

In one embodiment, a first through hole is formed in the disc body, the grinding body on each side comprises a mounting portion and a grinding portion which are connected with each other, the mounting portion is accommodated in the first through hole, the shape of the first through hole is matched with that of the mounting portion, and the grinding portion is abutted to the disc body.

In one embodiment, the grinding assembly further comprises a connecting member configured to detachably connect the grinding body and the disc body, the connecting member comprising a screw rod penetrating the disc body and the grinding bodies on both sides, and a nut threadedly connected with the screw rod to fasten the grinding bodies on both sides on the disc body.

In one embodiment, the nut is a locknut; or, the connecting piece still includes the stopper, the stopper is located the nut is kept away from one side of disk body, the stopper with the nut butt.

In one embodiment, the end of the abrasive body away from the disc body on each side is formed with a counter bore, and the nut is mounted in the counter bore on each side.

In one embodiment, a countersunk hole is formed on one end of each grinding body far away from the disc body, a stop part is formed on one end of the screw rod, the stop part is arranged in the countersunk hole of the grinding body on one side, and the nut is installed in the countersunk hole of the grinding body on the other side.

In one embodiment, the grinding disc further comprises a disc hub, the disc body surrounds the disc hub, the disc body is connected with the disc hub, a second through hole is formed in the disc hub, the disc body and the disc hub are both configured to rotate around the central axis of the second through hole, a plurality of key grooves are formed in the hole wall of the second through hole, the key grooves are uniformly arranged in the circumferential direction of the second through hole, and the cross-sectional shape of each key groove is semicircular.

In an embodiment, the outer contour line of the cross section of disk body includes first circular arc section, straightway and changeover portion, first circular arc section with the straightway is followed the circumference of disk body is arranged in turn, the changeover portion sets up first circular arc section with between the straightway, the changeover portion respectively with first circular arc section with the straightway links to each other and tangent.

In one embodiment, a third through hole is formed in the tray body, the third through hole penetrates through the tray body along the thickness direction of the tray body, and each first arc section is correspondingly provided with one third through hole;

at least one grinding assembly is correspondingly arranged on each side of the disc body along the thickness direction of the disc body, and each third through hole is correspondingly provided with at least one grinding assembly;

the third through holes, the corresponding grinding assemblies and the corresponding first arc sections are arranged along the radial direction of the disc body.

In one embodiment, the cross section of the disc body is circular or polygonal.

In one embodiment, a plurality of third through holes are formed in the tray body, and the third through holes penetrate through the tray body along the thickness direction of the tray body, and are uniformly arranged along the circumferential direction of the tray body.

A second aspect of embodiments of the present application provides a grinding mill comprising:

a grinding cylinder;

the driving shaft is rotationally connected with the grinding cylinder;

the grinding disc of any one of the above is positioned in the grinding cylinder, and the disc body is connected with the driving shaft; and

the driving part is in driving connection with the driving shaft and drives the driving shaft to rotate so as to drive the disc body to rotate.

The grinding disc comprises a disc body and a grinding assembly, wherein the grinding assembly comprises grinding bodies connected with the disc body, the two grinding bodies are arranged on the two sides of the disc body in the thickness direction of the disc body oppositely, and the grinding bodies protrude out of the disc body. Because two grinding bodies are arranged oppositely on the two sides of the disc body in the thickness direction of the disc body and protrude out of the disc body, the materials to be ground can be ground on any position of the disc body in the thickness direction of the disc body, and therefore the grinding efficiency is improved.

Drawings

FIG. 1 is a schematic view of a polishing disk according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a tray according to an embodiment of the present application;

FIG. 3 is a schematic view of the abrasive disk of FIG. 1 shown in another perspective, wherein the abrasive assembly does not represent a particular embodiment;

FIG. 4 is a cross-sectional view of an abrasive disk of an embodiment of the present application at location A-A in FIG. 3, showing a coupling member of an abrasive assembly including a threaded rod and nuts disposed on opposite ends of the threaded rod;

FIG. 5 is a structural schematic view of the tray body of FIG. 4;

FIG. 6 is a schematic view of the structure of the polishing body of FIG. 4;

FIG. 7 is a cross-sectional view of the abrasive disk of one embodiment of the present application at position A-A in FIG. 3, showing the attachment member of the abrasive assembly including a threaded rod with a stop at one end and a nut disposed at the other end of the threaded rod;

FIG. 8 is a schematic structural view of a disc according to an embodiment of the present application, the disc being shown in cross-section as a circle;

fig. 9 is a schematic structural view of a tray according to an embodiment of the present application, wherein the tray is shown with an octagonal cross-section.

Description of reference numerals: a tray body 1; a first through hole 11; a third through hole 12; a first arc segment 13; a straight section 14; a transition section 15; a grinding assembly 2; a grinding body 21; a counterbore 211; a mounting portion 212; a polishing section 213; a connecting member 22; a screw 221; a stopper portion 2211; a nut 222; a hub 3; a second through hole 31; a key slot 32.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

Before describing the embodiments of the present application, it is necessary to analyze the reason why the prior art has low grinding efficiency, and to obtain the technical solution of the embodiments of the present application through reasonable analysis.

In the prior art, along the thickness direction of a disc body of a grinding disc, grinding bodies on one side of the disc body and grinding bodies on the other side of the disc body are arranged in a staggered manner. For example, at a certain position of the tray body, a grinding body is arranged on one side in the thickness direction of the tray body, and a grinding body is not arranged on the other side in the thickness direction of the tray body; and at the other position of the plate body, a grinding body is not arranged on one side in the thickness direction of the plate body, and a grinding body is arranged on the other side in the thickness direction of the plate body. Therefore, in the thickness direction of the grinding disc, only the grinding body on one side of the disc body is used for grinding materials at a certain position of the disc body, the grinding body on the other side of the disc body does not grind the materials at the corresponding position, and the grinding body on the other side of the disc body is arranged at other positions on the disc body, so that the grinding efficiency of the disc body is low. If, the rinding body of disk body both sides sets up relatively and no longer staggers, then has arranged the arbitrary position department of rinding body on the disk body, has all the rinding body to grind the material along the both sides of disk body thickness direction on the disk body, can improve grinding efficiency.

In view of the above, the present invention provides a grinder, which includes a grinding cylinder (not shown), a driving shaft (not shown), a grinding disc and a driving member (not shown). The drive shaft is connected with the grinding cylinder in a rotating way. The grinding disc is positioned in the grinding cylinder and connected with the driving shaft. The driving part is in driving connection with the driving shaft, and the driving part drives the driving shaft to rotate so as to drive the grinding disc to rotate. So, driving piece drive shaft rotates, thereby the drive shaft drives the abrasive disc and rotates and grind the material in the grinding cylinder.

In one embodiment, the mill is a sand mill, which may be an agitated ball mill.

It will be appreciated that the mill is typically a horizontal mill.

Referring to fig. 1, 4 and 7, the polishing pad of the embodiment of the present application includes a pad 1 and a polishing assembly 2, the polishing assembly 2 includes a polishing body 21 connected to the pad 1, the two polishing bodies 21 are oppositely disposed on two sides of the pad 1 along a thickness direction of the pad 1, and the polishing body 21 protrudes out of the pad 1.

Because two grinding bodies 21 are arranged oppositely on the two sides of the disc body 1 along the thickness direction of the disc body 1 and protrude out of the disc body 1, the materials to be ground can be ground at any position on the disc body 1 along the two sides of the disc body 1 along the thickness direction, and therefore the grinding efficiency is improved.

In one embodiment, the disc 1 is connected to a drive shaft. The driving member drives the driving shaft to rotate so as to drive the disc body 1 to rotate.

It should be noted that the disk body 1 may be directly connected to the drive shaft or indirectly connected to the drive shaft.

In one embodiment, the disk 1 and the drive shaft may be integrally formed.

In one embodiment, the grinding disc further comprises a disc hub 3, the disc hub 3 is connected with the disc body 1, the disc body 1 surrounds the disc hub 3, and the disc body 1 is sleeved on the driving shaft through the disc hub 3.

It will be appreciated that the two grinding bodies 21 are arranged opposite to each other so that the forces on both sides of the disc 1 are more uniform during grinding of the material.

Specifically, referring to fig. 1, 4 and 7, one of the two grinding bodies 21 is located on one side of the disc body 1 along the thickness direction of the disc body 1, and the other one of the two grinding bodies 21 is located on the other side of the disc body 1 along the thickness direction of the disc body 1, and the two grinding bodies 21 are arranged oppositely and are not staggered with each other. I.e. the two abrasive bodies 21 are arranged in the thickness direction of the disc 1.

It will be appreciated that, referring to figures 4 and 7, in general, there may be a plurality of abrading assemblies 2, each abrading assembly 2 comprising two abrading bodies 21.

In one embodiment, the two side polishing bodies 21 are symmetrically arranged.

In one embodiment, referring to fig. 1 and 3, the number of the polishing assemblies 2 is 6, and the number of the polishing bodies 21 is 12.

In an embodiment, referring to fig. 2, 4, 5, 6 and 7, the disc 1 is formed with a first through hole 11, each side of the grinding body 21 includes a mounting portion 212 and a grinding portion 213 connected to each other, the first through hole 11 accommodates the mounting portion 212, the shape of the first through hole 11 is matched with the shape of the mounting portion 212, and the grinding portion 213 abuts against the disc 1. With such a structure, since the first through hole 11 accommodates the mounting portion 212, and the shape of the first through hole 11 is matched with the shape of the mounting portion 212, the first through hole 11 positions the mounting portion 212 along the radial direction of the first through hole 11, and the grinding body 21 is prevented from shaking along the radial direction of the first through hole 11. The grinding part 213 abuts against the disc body 1, so that the grinding part 213 is not pressed into the first through hole 11, and the grinding part 213 is ensured to protrude from the disc body 1 so as to grind the material.

In one embodiment, the shape of the first through hole 11 is matched with the shape of the mounting portion 212, which may be understood as transition fit or interference fit between the outer side surface of the mounting portion 212 and the inner side surface of the first through hole 11, or may be understood as clearance fit with a small clearance between the outer side surface of the mounting portion 212 and the inner side surface of the first through hole 11.

In an embodiment, the polishing body 21 may be provided with only the polishing portion 213 without the mounting portion 212, or the corresponding disc 1 may not be provided with a through hole, and the polishing body 21 may be welded on the disc 1.

In one embodiment, the grinding body 21 may be screwed to the disk 1. So, can realize being connected with dismantling of disk body 1 with grinding body 21, need change when grinding body 21 wearing and tearing, can only change grinding body 21, and need not change grinding body 21 and disk body 1 together.

In an embodiment, the grinding assembly 2 further comprises a coupling 22, the coupling 22 being configured to detachably couple the grinding body 21 and the disc 1. Thus, on the one hand, since the grinding body 21 is detachably connected to the disc body 1, when the grinding body 21 is worn and needs to be replaced, only the grinding body 21 can be replaced without replacing the grinding body 21 together with the disc body 1. On the other hand, the grinding body 21 and the disc body 1 are connected firmly by connecting the grinding body 21 and the disc body 1 through the connecting piece 22.

In an embodiment, the polishing body 21 may be provided with only the polishing portion 213 without the mounting portion 212, and the connecting member 22 penetrates through the two polishing portions 213 and the disk 1 to detachably connect the two polishing portions 213 and the disk 1.

In one embodiment, each of the grinding bodies 21 includes a mounting portion 212 and a grinding portion 213 connected to each other, and the connecting member 22 penetrates through the two grinding portions 213, the two mounting portions 212, and the disc body 1 to fasten the two grinding portions 213 to the disc body 1, so that the grinding bodies 21 are detachably connected to the disc body 1.

In one embodiment, referring to fig. 4 and 7, the connection member 22 includes a screw 221 and a nut 222, the screw 221 penetrates through the disc body 1 and the two side grinding bodies 21, and the nut 222 is in threaded connection with the screw 221 to fasten the two side grinding bodies 21 to the disc body 1. Thus, the nut 222 is screwed by the threaded connection between the nut 222 and the screw 221, so that the grinding body 21 sleeved on the screw 221 is fastened on the disc 1, and the grinding body 21 is detachably connected with the disc 1.

In one embodiment, the threaded rod 221 may be a rod-like member with threads on both ends, such as a stud.

In one embodiment, the nut 222 is used as a fastening member, and a locking and retaining measure needs to be applied to the nut 222 to prevent the grinding body 21 from falling off the disc 1 after the nut 222 is loosened.

In one embodiment, the nut 222 may be a locknut. The locknut itself has the function of preventing loosening. So, through locknut's locking function in order to avoid locknut pine to loosen and withdraw from.

In one embodiment, the connector 22 may further include a stop located on a side of the nut 222 away from the tray body 1, the stop abutting the nut 222 to prevent the nut 222 from being loosened and withdrawn.

In one embodiment, the stop member may also be a snap ring, which is snapped into a snap ring groove of the screw 221 to abut against the nut 222 to prevent the nut 222 from being released and withdrawn.

In one embodiment, the stop member may be a nut, and the nut 222 abutting the polishing body 21 and the nut serving as the stop member abut against each other to prevent the nut 222 abutting the polishing body 21 from being loosened and withdrawn.

In one embodiment, the screw 221 and the nut 222 abutting against the polishing body 21 may be welded. For example, spot welding is used between the nut 222 and the screw 221 which are in contact with the polishing body 21. In this way, the nut 222 abutting the polishing body 21 is prevented from being loosened and withdrawn by welding.

It will be appreciated that the nut 222 abutting the grinding body 21 and the threaded rod 221 are spot welded, and the nut 222 abutting the grinding body 21 can still be detached from the threaded rod 221, and the grinding body 21 and the disc 1 can still be detachably connected.

In one embodiment, referring to fig. 7, a countersink 211 is formed in the end of each side of the grinding body 21 away from the disc 1, and a nut 222 is mounted in each countersink 211. In this way, the nut 222 is embedded in the counter bore 211, so that the nut 222 does not protrude out of the grinding body 21 to contact the material, which would affect the grinding of the material. By shielding the nut 222 with the counterbore 211, the nut 222 is not exposed and the overall appearance of the abrasive assembly 2 is improved.

It will be appreciated that nuts 222 are provided at both ends of the stud bolts to be screwed with the stud bolts, thereby fastening the abrasive body 21 to the disc body 1.

In one embodiment, referring to fig. 4, a countersunk hole 211 is formed on an end of each of the grinding bodies 21 away from the disc body 1, a stop portion 2211 is formed on an end of the screw 221, the stop portion 2211 is disposed in the countersunk hole 211 of one of the grinding bodies 21, and the nut 222 is mounted in the countersunk hole 211 of the other grinding body 21. Thus, the one end of the screw 221 is formed with the stopping portion 2211, so that the screw 221 can abut and fasten the grinding body 21 through the stopping portion 2211 conveniently, and only the nut 222 at one end of the screw 221 needs to be screwed, so that the assembly and disassembly are convenient. And the nut 222 and the stopping portion 2211 are respectively arranged in the counter bore 211 and do not protrude out of the grinding body 21 to contact with the material, so that the grinding of the material is not affected. The nut 222 and the stop 2211 are shielded by the countersink 211, so that the nut 222 and the stop 2211 are not exposed, and the whole grinding assembly 2 is beautiful.

It will be appreciated that the screw 221 may generally be unthreaded at the end where the stop 2211 is located, and the screw 221 may be threaded at the other end opposite the stop 2211 to threadably engage the nut 222. For example, the screw 221 may be a bolt, the stopper 2211 may be a head of the bolt, and the other end of the bolt opposite to the head is provided with a thread.

The screw 221 may also be configured as a stepped shaft, and the end with the larger diameter is used as the stopper 2211 without a thread, and the thread of the screw 221 is provided at the end with the smaller diameter.

In one embodiment, referring to fig. 1, 2 and 3, the grinding disc further includes a hub 3, the disc body 1 surrounds the hub 3, the disc body 1 is connected to the hub 3, a second through hole 31 is formed in the hub 3, and both the disc body 1 and the hub 3 are configured to rotate around a central axis of the second through hole 31. In this way, the hub 3 can be fitted over the drive shaft via the second through hole 31.

In an embodiment, referring to fig. 1, fig. 2 and fig. 3, a plurality of key slots 32 are formed on the wall of the second through hole 31, the plurality of key slots 32 are uniformly arranged along the circumference of the second through hole 31, and the cross-sectional shape of the key slot 32 is a semi-circle. So, hub 3 forms the key-type connection through keyway 32 and the corresponding key in the drive shaft to fix hub 3 circumference in the drive shaft, rotate as the drive shaft, follow the drive shaft through hub 3 that the key-type is connected with the drive shaft and rotate, thereby drive disk body 1 and grinding component 2 and rotate. The plurality of key grooves 32 are uniformly arranged along the circumferential direction of the second through hole 31, so that the stress of the driving shaft is uniform. The cross-sectional shape of the key groove 32 is semicircular, so that stress concentration of the key groove 32 can be reduced to a certain extent compared with a rectangular key groove, the service life of the disc hub 3 is prolonged, and the key groove 32 with the semicircular cross section is simple in shape and convenient to process.

In one embodiment, the driving shaft is provided with a plurality of grinding discs, and a spacer (not shown) is arranged between two adjacent grinding discs to separate two adjacent grinding discs.

In an embodiment, referring to fig. 1, along the thickness direction of the disc body 1, the side surfaces of the two sides of the hub 3 protrude from the side surfaces of the corresponding sides of the disc body 1. Thus, the contact surface between the hub 3 and the drive shaft passing through the hub 3 can be increased, and the problem that the outer surface of the drive shaft is easy to wear due to excessive local pressure is reduced to a certain extent.

In an embodiment, referring to fig. 3, an outer contour line of the cross section of the disc body 1 includes first circular arc segments 13, straight segments 14 and transition segments 15, the first circular arc segments 13 and the straight segments 14 are alternately arranged along the circumferential direction of the disc body 1, the transition segments 15 are disposed between the first circular arc segments 13 and the straight segments 14, and the transition segments 15 are respectively connected and tangent to the first circular arc segments 13 and the straight segments 14. So, for disk body 1 structure of whole circle, this application embodiment is through the alternative setting of first circular arc section 13 and straightway 14 for disk body 1 has saved partial material, has reduced disk body 1 and has acted on the load on the drive shaft.

In one embodiment, referring to fig. 3, the number of the first arc segments 13 and the number of the straight segments 14 are 3. Thus, the amount of material used for the disk body 1 is further reduced, and the load of the disk body 1 on the drive shaft is reduced.

In one embodiment, the number of the first circular arc segments 13 and the number of the straight segments 14 may be 4, 5 or 6, and so on.

It will be appreciated that the transition section 15 is generally circular.

In an embodiment, referring to fig. 3, a third through hole 12 is formed on the tray body 1, the third through hole 12 penetrates through the tray body 1 along a thickness direction of the tray body 1, and each first arc segment 13 is correspondingly provided with one third through hole 12. At least one grinding assembly 2 is correspondingly arranged on each side of the disc body 1 along the thickness direction of the disc body 1 through each third through hole 12. The third through holes 12, the corresponding grinding assemblies 2 and the corresponding first circular arc segments 13 are arranged in the radial direction of the disc body 1. Structural style like this, radial arrangement along disk body 1 of third through-hole 12, grinding component 2 and first circular arc section 13 for third through-hole 12 and grinding component 2 locate the great position in radial space on disk body 1, and grinding body 21 can be as far as possible along disk body 1 and radially lean on outer the arranging, obtains better grinding effect, and has sufficient space in order to form great third through-hole 12 along disk body 1's radial, makes things convenient for the material to circulate in disk body 1's both sides.

In an embodiment, referring to fig. 3, when two polishing assemblies 2 are correspondingly disposed in each third through hole 12 on each side of the disc body 1 along the thickness direction of the disc body 1, in the cross section of the disc body 1, the arrangement direction of the third through holes 12 and the polishing assemblies 2 points to the midpoint of the first arc segment 13 along the rotation center of the disc body 1, and the two polishing assemblies 2 are symmetrical about a connection line between the rotation center of the disc body 1 and the midpoint of the first arc segment 13. In this way, the two grinding assemblies are not arranged in the radial direction of the disc body 1, but the two grinding assemblies 2 are symmetrical about the line between the rotation center of the disc body 1 and the midpoint of the first circular arc segment 13, and enough space can be made between the grinding assemblies 2 and the rotation center of the disc body 1 to form the larger third through hole 12. So that the material can smoothly flow from one side of the tray body 1 to the other side of the tray body 1 through the third through hole 12.

In one embodiment, referring to fig. 8, the cross-section of the plate 1 may be circular.

In one embodiment, referring to fig. 9, the cross-section of the tray 1 may be polygonal.

In one embodiment, referring to fig. 9, the cross-section of the tray 1 may be octagonal. Each side of the octagon is correspondingly provided with one third through hole 12 or two first through holes 11, the two first through holes 11 are arranged along the radial direction of the disc body 1, and the first through holes 11 and the third through holes 12 are alternately arranged along the circumferential direction of the disc body 1.

It should be noted that the cross-sectional shape of the tray body 1 is not particularly limited, and may be a quadrangle, a pentagon, a hexagon, and the like. The cross-sectional shape of the tray body 1 may also be an irregular shape.

In an embodiment, referring to fig. 2 and fig. 3, a third through hole 12 is formed on the tray body 1, and the third through hole 12 penetrates through the tray body 1 along a thickness direction of the tray body 1. In this way, the material is convenient to flow from one side of the tray body 1 to the other side of the tray body 1 through the third through hole 12.

In an embodiment, referring to fig. 2 and 3, the third through holes 12 are multiple, and the multiple third through holes 12 are uniformly arranged along the circumferential direction of the disc body 1.

It should be noted that the specific arrangement form of the first through hole 11 and the third through hole 12 on the tray body 1 may not be particularly limited.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (12)

1. An abrasive disk, comprising:

a tray body; and

the grinding assembly comprises grinding bodies connected with the disc body, the two grinding bodies are oppositely arranged on two sides of the disc body along the thickness direction of the disc body, and the grinding bodies protrude out of the disc body.

2. The grinding disc as claimed in claim 1, wherein the disc body is formed with a first through hole, the grinding body includes a mounting portion and a grinding portion connected to each other on each side, the first through hole accommodates the mounting portion, the first through hole has a shape adapted to the shape of the mounting portion, and the grinding portion abuts against the disc body.

3. A grinding disc according to claim 1 or 2, wherein the grinding assembly further comprises a coupling member configured to detachably couple the grinding bodies and the disc body, the coupling member comprising a threaded rod extending through the disc body and the grinding bodies on both sides, and a nut threadedly coupled to the threaded rod to secure the grinding bodies on both sides to the disc body.

4. A grinding disc according to claim 3, wherein the nut is a locknut; or, the connecting piece still includes the stopper, the stopper is located the nut is kept away from one side of disk body, the stopper with the nut butt.

5. An abrasive disc according to claim 3, wherein the end of the abrasive body remote from the disc body on each side is countersunk into which the nut is mounted.

6. An abrasive disc according to claim 3, wherein each side of the abrasive bodies is countersunk at the end remote from the disc body, and the threaded rod is formed at its end with a stop which is disposed in the countersunk hole of the abrasive body on one side, and the nut is mounted in the countersunk hole of the abrasive body on the other side.

7. The abrasive disk according to claim 1 or 2, further comprising a disk hub, wherein the disk body is wound around the disk hub, the disk body is connected to the disk hub, a second through hole is formed in the disk hub, the disk body and the disk hub are both configured to rotate around a central axis of the second through hole, a plurality of key grooves are formed in a wall of the second through hole, the plurality of key grooves are uniformly arranged along a circumferential direction of the second through hole, and a cross-sectional shape of each key groove is semicircular.

8. The grinding disc of claim 1 or 2, wherein the outer contour line of the cross section of the disc body comprises a first circular arc section, straight line sections and transition sections, the first circular arc section and the straight line sections are alternately arranged along the circumferential direction of the disc body, the transition sections are arranged between the first circular arc section and the straight line sections, and the transition sections are respectively connected with and tangent to the first circular arc section and the straight line sections.

9. The grinding disc of claim 8, wherein a third through hole is formed in the disc body, the third through hole penetrates through the disc body along the thickness direction of the disc body, and one third through hole is correspondingly arranged on each first circular arc section;

at least one grinding assembly is correspondingly arranged on each side of the disc body along the thickness direction of the disc body, and each third through hole is correspondingly provided with at least one grinding assembly;

the third through holes, the corresponding grinding assemblies and the corresponding first arc sections are arranged along the radial direction of the disc body.

10. An abrasive disc according to claim 1 or 2, characterized in that the cross-section of the disc body is circular or polygonal in shape.

11. The grinding disc as claimed in claim 1 or 2, wherein a plurality of third through holes are formed in the disc body, and the plurality of third through holes penetrate through the disc body in the thickness direction of the disc body, and are uniformly arranged in the circumferential direction of the disc body.

12. A grinding mill, characterized in that it comprises:

a grinding cylinder;

the driving shaft is rotationally connected with the grinding cylinder;

the grinding disc according to any one of claims 1 to 11, located in the grinding cylinder, the disc body being connected to the drive shaft; and

the driving part is in driving connection with the driving shaft and drives the driving shaft to rotate so as to drive the disc body to rotate.

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