WO2013063833A1

WO2013063833A1 - Polishing wheel

Info

Publication number: WO2013063833A1
Application number: PCT/CN2011/082633
Authority: WO
Inventors: 胡萍辉; 陈馨; 郑温宇; 黄明辉
Original assignee: 浙江天兴管业有限公司
Priority date: 2011-11-04
Filing date: 2011-11-22
Publication date: 2013-05-10
Also published as: CN103042478A

Abstract

A polishing wheel for grinding a pipe, comprising an outer wheel (3) and an inner wheel (1) that are coaxial, connected, and rotate synchronously with each other. The inner wheel (1) has arranged on the inner wall thereof two or more flexible grinding components (4). The flexible grinding components (4) are arc-shaped. The flexible grinding components (4) are connected at one end thereof to the inner wall of the inner wheel (1); the flexible grinding components (4) have the tips of the other end thereof arranged on a same circle. The outer wheel (3) has arranged thereon a linkage part. The outer wheel (3) is connected to an external driving component via the linkage part, thus driving the outer wheel (3) into rotation. Because the outer wheel (3) and the inner wheel (1) are coaxial and fixed to each other, the inner wheel (1) rotates with the rotation of the outer wheel (3). The flexible grinding components (4) on the inner wall of the inner wheel (1) are used to grind the pipe passing through the inner wheel (1). This polishing wheel is structurally simple and polishes evenly. Rotation is obviated for the pipe-to-be-processed, which can be processed into a diametric pipe, allowing for high efficiency.

Description

Polishing wheel

The present invention relates to a grinding member, and more particularly to a polishing wheel for grinding a pipe.

Background technique

In the pipe production process, the outer surface polishing of the pipe is an important process. In the current practice, the pipe is placed close to the rotating polishing wheel, and the pipe is rotated to meet the technical requirements of surface polishing. Using the traditional method of polishing the pipe, the polishing of the product will be very uneven, the technical requirements of the workers are higher, and more labor is required. In the existing patent documents, the Chinese patent is disclosed: "Polishing wheel of polishing machine (CN2732419Y)", the polishing wheel comprises a wheel frame and a rubber ring, and the circumference of the circumference of the wheel frame is provided with a plurality of strips, the circumference of the wheel frame The strip has a ring belt surrounding the wheel frame, and the outer edge of the wheel frame is covered with a rubber ring. Chinese patent: "A polishing wheel (CN201931366U)", comprising: a polishing wheel body having a mounting groove on the outer circumferential surface thereof in the circumferential direction, and a mounting hole (U) for the transmission shaft to pass through at the center thereof; a cotton layer in the mounting groove; a drive shaft disposed in the mounting hole. By providing a mounting groove for winding the cotton cloth and a mounting hole for mounting the drive shaft on the polishing wheel body, the polishing wheel body can be combined with the cotton layer and the drive shaft to form a polishing wheel having a function of polishing and wiping stains, respectively. In use, the drive shaft of the buffing wheel can be engaged with the clamping device of the external power rotating device, and the rotation of the external power rotating device can drive the polishing wheel to run at a high speed, thereby cleaning the EvA on the glass suede. The above two structures still do not solve the defects of the existing polishing technology.

Summary of the invention

The invention provides a polishing wheel with simple structure, polishing and hooking, no need to rotate the pipe to be processed, high efficiency, and can process the variable diameter pipe; and solves the uneven polishing of the polishing wheel existing in the prior art, in polishing At the same time, it also needs to rotate the pipe, which is time-consuming and labor-intensive, and has low technical efficiency.

The invention also provides an inner wheel which can be adapted to various specifications, so that the steel pipe of different diameters can be polished and the polishing wheel can be disassembled conveniently, and the polishing wheel existing in the prior art can only solve the single diameter. The pipe is polished, the versatility is poor, and the cost is high.

The above technical problem of the present invention is solved by the following technical solution: A polishing wheel comprising an outer wheel and an inner wheel coaxially and connected to each other for synchronous rotation, the inner wall of the inner wheel being provided with two or more elastic grinding The elastic grinding member has an arc shape, one end of the elastic grinding member is connected to the inner wall of the inner wheel, and the other end of the elastic grinding member is located on the same circle, and the outer wheel is provided with a linkage portion. The outer wheel is connected to the external driving member through the linkage portion, thereby driving the outer wheel to rotate. Since the outer wheel and the inner wheel are coaxial and fixed to each other, the inner wheel rotates with the rotation of the outer wheel, and is worn through the elastic grinding member on the inner wall of the inner wheel. The pipe of the inner wheel is ground. During the polishing process, the pipe does not rotate and only needs to be driven. The pipe can be moved in a straight line, so that the entire pipe is polished. The grinding member on the inner wall of the inner wheel is elastic, and the end point of the elastic grinding member is the same distance from the center of the inner wheel, so that a circle centered on the center of the inner wheel can be formed, and the diameter of the circle is slightly smaller than to be ground. The outer diameter of the cut pipe, and the elastic grinding member is curved, so that the outer circumferential surface of the pipe can be more closely adhered according to the diameter and curvature of the pipe, and the pipe can be effectively ground. Since the grinding member is elastic, if a pipe has a variety of diameters, it can be ground in one process. It is only necessary to ensure that the diameter of the inner circle formed by the grinding member is the same as the minimum diameter on the pipe. Processing efficiency.

There are many ways to match the inner and outer wheels, such as the interference fit of the shaft hole, the transition fit or the inlay fit, etc., as long as the two rotate synchronously. Preferably, a projection is provided on an outer circumferential surface of the inner wheel, and a groove matching the projection is provided on an inner wall of the outer wheel. The combination of the protrusion and the groove is arranged to facilitate the assembly and disassembly, and at the same time, the two can not be mutually moved, the structure is stable, and the synchronous operation effect is good.

Preferably, a nest is provided between the inner and outer wheels, and the nesting is coaxial with the inner and outer wheels and rotates synchronously. The nesting is fixed with both the inner and outer wheels, and the inner wheel, the nesting and the outer wheel rotate synchronously. Since the outer wheel is connected to the driving device, its outer dimensions cannot be changed at will. In order to realize the polishing process of the pipes of different diameters, different inner rings can be matched by replacing different nests, thereby realizing different diameters. The pipe is polished to improve the versatility of the equipment, reduce costs and increase efficiency.

Of course, the mating of the nesting with the inner and outer wheels can also be of any known form, such as the transition fit in the form of a shaft hole mentioned above, or a nested fit or the like. Preferably, the nested outer circumferential surface is provided with a positioning key, and a positioning groove is arranged on the inner circumferential surface of the nest, the positioning key is matched with the groove of the inner circumferential surface of the outer wheel, and the positioning groove is The protrusion of the outer circumferential surface of the inner wheel is matched, the length of the outer wheel is larger than the nesting, and the lengths of the positioning key and the inner wall of the outer wheel are smaller than the length of the outer wheel, and the inner wheel is The length of the protrusion is smaller than the length of the inner wheel, and the length of the positioning key is smaller than the length of the groove, and the length of the protrusion is smaller than the length of the positioning groove. The inner wheel and the nesting, the nesting and the outer wheel are both grooved and convexly matched, which can improve the adaptability of the polishing wheel. At the same time, the length of the positioning key and the groove is smaller than that of the outer wheel, and can be performed through the end of the groove Positioning, to improve the convenience of installation, the matching relationship on the inner wheel is also the same, which makes the positioning groove and the groove both open at one end, and the other end is sealed, and the positioning is performed through the closed end, thereby improving the quickness of installation. Whether it is the outer wheel and the nesting or the cooperation between the nesting and the inner wheel, the length of the groove is larger than the length of the protrusion, and a small space can be left in the groove, so that the annular cover can be better positioned and fixed.

The inner wheel, the nesting and the outer wheel can be fixedly fixed by the protrusion and the groove, that is, the positioning is also fixed, or the width of the groove is slightly larger than the protrusion, so that the cooperation of the groove and the protrusion merely serves as a positioning function. More preferably, an annular cover is provided on one side of the outer wheel, the inner diameter of the annular cover is the same as the inner diameter of the inner wheel, and the outer diameter of the annular cover is the same as the outer diameter of the outer end of the outer wheel. After the inner wheel, the nesting and the outer wheel are installed, the three are fixed by the cover plate to improve the fastening degree, and Moreover, it is easy to assemble and disassemble, and the end surface of the annular cover plate is connected to the end faces of the inner wheel, the nesting and the outer wheel, thereby fixing the three parts, and the cover plate can be fixed on the end surface by screws, the structure is simple, and dust can be prevented from entering. Inner wheel, nesting and outer wheel diameter for increased equipment life.

More preferably, an annular cover plate is disposed on one side of the outer wheel, the annular cover plate has three steps, and the first layer having the smallest inner diameter has the same annular thickness as the inner wheel, and is on the outer circumferential surface of the first layer. a first positioning protrusion is provided, and the first positioning protrusion cooperates with the positioning groove of the nested inner wall, and the annular shape of the second layer centered on the inner diameter is the same as the wall thickness of the nest, and is provided on the annular outer circumferential surface of the second layer. The second positioning protrusion cooperates with the groove in the outer wheel, and the width of the annular layer of the third layer is the same as the wall thickness of the outer wheel. The three layers on the end surface of the annular cover plate respectively correspond to the inner wheel, the nesting and the outer wheel, and the positioning protrusions of the two layers respectively correspond to the outer wheel and the groove and the positioning groove on the nest, thereby positioning the ring cover, and the ring cover is arranged The plate, the inner wheel, the nesting and the outer wheel form a whole, the noise of synchronous rotation is small, the positioning effect is good, and the efficiency of equipment operation is improved.

The elastic grinding member may be formed by separately molding the outer member or pasting or welding the inner wheel, or may be integrally formed with the inner wheel. Preferably, the elastic grinding member comprises a supporting spring piece integrally formed with the inner wheel, the supporting spring piece and the inner wheel have the same wall thickness, the lower part of the supporting spring piece is a through hole, and the supporting spring piece has an arc length not greater than The arc length at the hole is such that an abrasive patch is attached to the inner surface of the supporting spring piece, and the arc length of the abrasive patch is not less than the arc length of the supporting spring piece. The elastic grinding member is integrally formed with the inner wheel, has a simple structure, and has good elastic effect. The elastic member is a rectangular opening formed on the circumferential wall of the inner wheel, and the three sides of the opening are all cut, and only one of the sides is connected with the inner wheel. Since the inner wheel is made of spring steel material, it has a certain elasticity. Each support spring piece is tilted to the same angle in the center direction of the inner wheel, so that the end of the support spring piece is at the same distance from the center of the inner wheel, and the upper surface of the support spring piece is pasted with the epoxy paste by the epoxy resin AB glue. The elastic grinding member of the structure has a simple structure, and the abrasive patch can be easily replaced, thereby reducing the cost. The length of the abrasive patch is not less than the length of the supporting spring piece, which can ensure a larger area of contact with the pipe and improve the grinding effect.

More preferably, the elastic grinding members are evenly distributed on the inner wall of the inner wheel, and the elastic grinding members are four, and the through holes are alternately arranged with the grooves on the inner wheel, and the length of the abrasive patch is 5~ 10mm. The elastic grinding members are evenly distributed on the inner wall, so that the grinding can be ensured and the grinding effect is good. The number of elastic grinding members can be adjusted according to the inner diameter of the pipe to be ground, and different inner wheels can be arranged differently. Number of elastic grinding members. The through holes are arranged in a staggered manner with the grooves, that is, the elastic grinding members are arranged in a staggered manner with the grooves, so as to ensure that the forces on the inner wheel wall are uniformly hooked during the grinding process, thereby ensuring the uniformity of the grinding.

Preferably, the wall thickness of the inner wheel is smaller than the thickness of the nest between the inner wheel and the outer wheel, and the angle between the supporting spring piece and the inner wheel is 15 ° to 35 °. The inner wheel is provided with an elastic grinding member, because the elastic grinding member must have a relatively good elasticity, so the inner wheel is generally thinner than the outer wheel and the outer wheel. The angle between the supporting spring piece and the inner wall ensures that the tube can be well grounded for effective grinding in the case of good elasticity. The linkage of the outer wheel can take many forms, such as a gear mesh drive, or a chain drive, a coaxial drive, and the like. Preferably, the linkage portion of the outer wheel comprises a central annular belt groove on the outer circumferential surface of the outer wheel, and the diameter of the two ends of the outer wheel is smaller than the diameter of the annular belt groove at the middle portion. The outer wheel rotates by the belt, and the small diameter at both ends of the outer wheel can conveniently arrange the bearing, and support the belt rotation transmission to improve the transmission effect.

Therefore, the polishing wheel of the present invention has the following advantages: 1. An elastic grinding member is disposed on the inner wall of the inner wheel, and the elastic grinding member can well wrap the pipe passing through the inner wheel, and the processing efficiency is high; The inner wheel rotates with the rotation of the outer wheel, thereby grinding the pipe passing through the inner wheel without the need for the pipe to rotate, saving time and labor; 3, the uniformity of the elastic grinding member can improve the uniformity of the grinding; 4. By connecting the inner and outer wheels by nesting, it is possible to replace different inner wheels to achieve grinding of pipes of different diameters, improve the adaptability of the equipment, and reduce the cost.

DRAWINGS

Figure 1 is a perspective view of a polishing wheel of the present invention

Figure 2 is a front elevational view of a polishing wheel of the present invention.

Figure 3 is a left side view of Figure 2.

Figure 4 is a schematic exploded view of Figure 2. .

Figure 5 is a perspective view of the inner wheel.

Figure 6 is a front view of Figure 5.

Figure 7 is a right side view of Figure 5.

Figure 8 is a perspective view of the outer wheel.

Figure 9 is a front view of Figure 8.

Figure 10 is a right side view of Figure 8.

Figure 11 is a nested perspective view.

Figure 12 is a front view of Figure 11 .

Figure 13 is a right side view of Figure 11.

Figure 14 is a perspective view of the cover.

Figure 15 is a front elevational view of Figure 14.

Figure 16 is a right side view of Figure 14.

Figure 17 is another exploded perspective view of the present invention.

detailed description

The technical solutions of the invention will be further specifically described below by way of embodiments and with reference to the accompanying drawings.

Example 1: As shown in FIG. 1, a polishing wheel includes a synchronously rotating and coaxial inner wheel 1, a nest 2 and an outer wheel 3. There are four uniformly curved elastic grinding members 4 in the inner wheel 1, and one end of the four elastic grinding members 4 is connected to the inner wall of the inner wheel 1, and the other end is equal to the center distance of the inner wheel 1. The diameter of the machining inner circle 5 formed by the four end points is slightly smaller than the diameter of the pipe to be ground (as shown in Fig. 2), and the elastic grinding member 4 can be elastically deformed according to the change of the diameter of the pipe to be ground.

As shown in FIG. 3, the diameter of the middle portion of the outer wheel 3 is larger than the diameter of the two ends, and a V-shaped belt groove 6 is formed on the outer circumferential surface of the middle portion for the external belt transmission system, and the diameters of the outer ends of the outer wheel 3 are small for mounting the support bearing. The support bearing is positioned by an end face of a section having a large diameter in the middle of the outer wheel.

As shown in Fig. 4, the length of the inner wheel 1 is smaller than the length of the nest 2, and the length of the nest 2 is smaller than the length of the outer wheel 3. The inner wheel 1 and the nest 2 are snapped into the outer wheel from one side of the outer wheel 3, and then the inner wheel 1 and the nest 2 are fixed in the outer wheel 3 by an annular cover 7 on the side of the outer wheel 3. On the inner wall of the outer wheel 3, three elongated grooves 8 are provided, one end of the groove 8 is closed, and the other end is open, and the opening is flush with the end surface of the outer wheel 3. The length of the nest 2 is smaller than the length of the outer wheel 3. On the outer circumferential surface of the nest 2, three positioning keys 9 are formed integrally with the grooves 8 on the outer wheel, and one end of the positioning key 9 abuts on the end of the groove 8. The other end is flush with the end face of the nest 2, and the length of the positioning key 9 is smaller than the length of the groove 8. On the inner circumferential surface of the nest 3, four positioning grooves 10 are formed which are integrally formed with the nesting body. On the inner circumferential surface of the inner wheel 1, four protrusions 11 which cooperate with the positioning groove 10 are integrally formed, and the protrusions are formed. The length of 11 is smaller than the length of the positioning groove 10. The outer wheel 3 and the nest 2 are fixed by the cooperation of the groove 8 and the positioning key 9, and the nest 2 and the inner wheel 1 are fixed by the cooperation of the positioning groove 10 and the protrusion 11. After the outer wheel 3, the nest 2 and the inner wheel 1 are positioned and fixed to each other, the three are fastened by the annular cover 7, and the screw hole 12 is opened on the end surface of the outer wheel 3, and the annular cover 7 is locked to the outer wheel by the screw 13. 3, thereby fixing the outer wheel 3, the nest 2 and the inner wheel 1.

As shown in FIG. 5, the inner wheel 1 is an annular body formed by spring steel, and the inner wheel 1 has a wall thickness of 1 mm. An elastic grinding member 4 is integrally formed on the inner wall of the inner wheel 1, and the wall thickness of the inner wheel 1 is as shown in FIG. The thinner one can ensure that the integrally formed elastic grinding member 4 has better elasticity. On the circumferential surface of the inner wheel 1, four rectangular windows 14 are arranged, and the three sides of the window of the window 14 are separated from the window, only one side is connected to the window 14, and the window page is turned up toward the center of the inner wheel to form a supporting spring piece. 15, the supporting spring piece 15 has an arc length of 8 mm, and the angle between the supporting spring piece 15 and the inner wheel 1 is 25 °.

As shown in Fig. 6, the end of the support spring piece 15 forms a diameter of the machined inner circle 5 which is smaller than the diameter of the pipe to be processed. A grinding patch 16 is attached to the inner surface of the supporting spring piece 15 by epoxy resin AB. The length of the grinding patch 16 is greater than the length of the supporting spring piece 15, and if the four grinding patches 16 are spliced together, The circumferential surface formed is slightly smaller than the inner circumferential surface of the inner wheel 1, and the grinding patch 16 can well wrap the outer circumferential surface of the pipe to be ground for grinding.

As shown in Fig. 7, the projection 11 on the inner wheel 1 and the window 14 of the inner wheel 1 are staggered, and one end of the projection 11 starts from One end face of the inner wheel 1, and the other end of the boss 11 is located at the center of the inner wheel 1. Both ends of the window 14 are substantially flush with both ends of the inner wheel 1. The length of the window 14 is larger than the projection 11, that is, the length of the elastic grinding member 4 is substantially the same as the length of the inner wheel 1, ensuring the largest grinding surface and improving the grinding effect.

As shown in Figures 8 and 9, the center of the outer wheel 3 is a through hole 17, and the inner circumferential surface of the outer wheel 3 is evenly provided with three grooves 8 which cooperate with the positioning keys 9 of the outer circumferential surface of the nest 2, the groove 8 The length is half of the length of the outer wheel 3, and three screw holes 12 are evenly distributed on the end face of the outer wheel 3 for connection with the annular cover plate 7 by screws 13.

As shown in FIG. 10, the outer wheel 3 is divided into three sections, the outer circumference of the intermediate end is larger than the two ends, and the outer circumferences of the two sections at the two ends have the same diameter, and the thickness of the two sections at both ends is 4 mm, and the outer circumference of the middle section The surface is provided with a V-shaped belt groove 6, and two sections at both ends are used to mount the support bearing.

As shown in Figures 11 and 12 and 13, the nesting 2 is a ring shape, the wall thickness of the nesting 2 is 4 mm, and three positioning keys 9 are evenly distributed on the outer circumferential surface of the nest 2, on the inner circumferential surface of the nest 2 There are four positioning slots 10, and the positioning key 9 cooperates with the groove 8 of the inner wall of the outer wheel 3. The length of the positioning key 9 is smaller than the length of the groove 8; the positioning groove 10 cooperates with the protrusion 11 of the outer wall of the inner wheel 1, and the positioning groove 10 The length is greater than the length of the protrusion 11.

As shown in Figures 14, 15 and 16, the annular cover 7 is integrally formed by a three-layered ring, and the annular portion 18 of the first layer located at the innermost side has the smallest diameter and the annular width is the same as the thickness of the inner wheel 1, first The annular ring 18 of the layer abuts the inner wheel 1, and four outer positioning protrusions 19 are evenly distributed on the outer circumferential surface of the ring 18 of the first layer, and the first positioning protrusion 19 cooperates with the positioning groove 10 on the nest 2 The length of the positioning groove 10 is equal to the length of the first positioning protrusion 19 and the protrusion 11 on the inner wheel 2, and the first positioning protrusion 19 is in contact with the protrusion 11 on the inner wheel. In the three-layer annular body, the diameter of the ring 20 of the second layer is centered, and the outer circumferential surface of the ring 20 of the second layer is uniformly provided with three second positioning protrusions 21, and the second positioning protrusion 21 and the concave on the outer wheel 3 The slot 8 is engaged, the length of the positioning key 9 and the length of the second positioning protrusion 21 are equal to the length of the groove 8 of the outer wheel, the second positioning protrusion 21 is in contact with the positioning key 9, and the width of the third layer ring 22 and the outer wheel The end wall thickness is the same, the third layer ring 22 is in contact with the end surface of the outer wheel 3, and a screw hole 12 is formed in the end surface of the third layer ring 22 for fixing the screw 13. As shown in Fig. 16, the first layer of the ring, the second layer of the ring and the third layer of the ring have the same thickness. The first positioning projection 19 and the second positioning projection 21 on the annular cover 7 fix the relative positions of the annular cover 7 and the inner wheel 1, the nest 2 and the outer wheel 3, and then fix the annular cover 7 by screws 13. On the end face of the outer wheel 3.

In use, the three are assembled by the grooves and projections between the inner wheel, the nest and the outer wheel, and then the annular cover seals the three together as a whole at the end. The auxiliary section with a tapered front end is connected to the pipe, and then the auxiliary section is inserted into the polished inner wheel until the pipe contacts the abrasive patch, and the driving motor drives the outer wheel to rotate through the belt, and is supported by the bearing in two sections of the outer wheel, because the inner wheel The outer wheel and the outer wheel are coaxial and fixed to each other, thereby driving the polished inner wheel and the abrasive patch to rotate together, and hooking and polishing the outer surface of the pipe. During the polishing process, the pipe does not rotate, only the pipe is required to move in a straight line, so that the hook is polished. Whole pipe.

Example 2:

As shown in Fig. 17, a polishing wheel includes an inner wheel 1, a nest 2 and an outer wheel 3 which are coaxially and synchronously rotated. Different from the embodiment 1, there is no annular cover 7 in the embodiment, and the outer circumferential surface of the inner wheel 1 is evenly distributed with four protrusions 11 integrally formed with the inner wheel through the clearance fit and the positioning on the nest. The length of the protrusion 11 is the same as the length of the positioning groove 10. The positioning key 9 of the outer circumferential surface of the nesting 2 is in a clearance fit with the groove 8 of the inner wall of the outer wheel, and the length of the positioning key 9 is the same as the length of the groove 8. . During assembly, the inner wheel is embedded in the nest, and the two are tightly fitted. Similarly, the nest with the inner wheel is embedded in the outer wheel, so that the three are tightly fitted and will not loosen.

Claims

Claim

A polishing wheel, comprising: an outer wheel and an inner wheel coaxially and connected to each other for synchronous rotation, wherein an inner wall of the inner wheel is provided with two or more elastic grinding members, and the elastic grinding member In the shape of an arc, one end of the elastic grinding member is connected to the inner wall of the inner wheel, and the end of the other end of the elastic grinding member is located on the same circle, and the outer wheel is provided with a linkage portion.

2. A polishing wheel according to claim 1, wherein: a convex surface is provided on an outer circumferential surface of said inner wheel, and a concave surface matching said convex surface is provided on an inner wall of said outer wheel groove.

3. A polishing wheel according to claim 1, wherein: a nest is provided between the inner and outer wheels, and the nesting is coaxial with the inner and outer wheels and rotates synchronously.

4. The polishing wheel according to claim 3, wherein: the nested outer circumferential surface is provided with a positioning key, and a positioning groove is provided on the inner circumferential surface of the nest, and the positioning key is The groove of the inner circumferential surface of the outer wheel cooperates, the positioning groove cooperates with the protrusion of the outer circumferential surface of the inner wheel, the length of the outer wheel is larger than the nesting, the positioning key and the groove of the inner wall of the outer wheel The length of the protrusion on the inner wheel is smaller than the length of the inner wheel, and the length of the positioning key is smaller than the length of the groove, and the length of the protrusion is smaller than the length of the positioning groove.

5. A polishing wheel according to claim 3, wherein: an annular cover is provided on one side of the outer wheel, the inner diameter of the annular cover is the same as the inner diameter of the inner wheel, and the annular cover The outer diameter is the same as the outer diameter of the outer wheel end face.

6. A polishing wheel according to claim 4, wherein: an annular cover is provided on one side of the outer wheel, the annular cover has a three-step shape, and the width of the first layer having the smallest inner diameter is within the width The wall thickness of the wheel is the same, and the first positioning protrusion is provided on the annular outer circumferential surface of the first layer, the first positioning protrusion cooperates with the positioning groove of the nested inner wall, and the annular width of the second layer centered on the inner diameter is nested The wall thickness is the same, and a second positioning protrusion is disposed on the annular outer circumferential surface of the second layer, and the second positioning protrusion cooperates with the groove in the outer wheel, and the annular width of the third layer is the same as the wall thickness of the outer wheel.

The polishing wheel according to any one of claims 1 to 6, wherein the elastic grinding member comprises a supporting spring piece integrally formed with the inner wheel, and the supporting spring piece and the inner wheel have the same wall thickness. The underside of the supporting spring piece is a through hole, the arc length of the supporting spring piece is not larger than the arc length at the through hole, and the inner surface of the supporting spring piece is pasted with an abrasive patch, and the arc length of the abrasive patch is not less than Support the arc length of the spring piece.

8. A polishing wheel according to claim 7, wherein: said elastic grinding members are evenly distributed on the inner wall of the inner wheel, and the elastic grinding members are four, the through holes and the grooves on the inner wheel. Staggered, the length of the abrasive patch is 5 to 10 mm.

9. The polishing wheel according to claim 7, wherein: the inner wheel has a wall thickness smaller than a nested thickness between the inner wheel and the outer wheel, and the support spring piece and the inner wheel are clamped. The angle is 15 ° ~ 35 °.

The polishing wheel according to any one of claims 3 to 6, wherein: the interlocking portion of the outer wheel comprises a central annular belt groove on an outer circumferential surface of the outer wheel, and the outer ends of the outer wheel are smaller in diameter than the middle portion. Straight at the end of the belt 6

CC9Z80/llOZN3/X3d CC8C90/CT0Z OAV