CN110193779B

CN110193779B - Nonlinear stone grinding machine

Info

Publication number: CN110193779B
Application number: CN201910651683.XA
Authority: CN
Inventors: 沈希文; 王山; 梁志华; 谢又开
Original assignee: Foshan Gaoming Jinshi Building Materials Co ltd
Current assignee: Foshan Gaoming Jinshi Building Materials Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2021-06-01
Anticipated expiration: 2039-07-18
Also published as: CN110193779A

Abstract

The invention discloses a nonlinear stone polisher which comprises a rack and a polishing device arranged on one side of the rack; the frame is provided with a conveying component for conveying stone; a plurality of press roller devices for limiting the movement state of the stone are arranged above the conveying assembly; the compression roller device comprises an adjusting frame; the adjusting frame is provided with a plurality of roller blocks which can rotate relative to the adjusting frame; a conveying space for placing the stone is formed between the roller block and the conveying assembly; the conveying space is sequentially provided with a feeding area, a polishing area and a feeding area along the conveying direction of the stone; the roller blocks are far away from and close to the conveying assembly and are pressed on the stone; the polishing device comprises a swing arm block, a driving assembly for driving the swing arm block to move up and down and a polishing head capable of rotating relative to the swing arm block; the polishing part of the polishing head is positioned in the polishing area. The invention has high automation degree, improves the safety coefficient, solves the problem of harm of dust to human bodies and improves the production efficiency.

Description

Nonlinear stone grinding machine

Technical Field

The invention relates to the technical field of stone manufacturing, in particular to a nonlinear stone grinding machine.

Background

The stone material is widely applied to interior decoration design, curtain wall decoration and public facility construction as a high-grade building decoration material, common materials in the market at present mainly comprise natural stone and artificial stone, the natural stone is divided into slate and granite according to the quality of material chemical characteristics, the artificial stone is divided into terrazzo and synthetic stone according to the working procedures, the terrazzo is formed by forging and pressing raw materials such as cement and concrete, the synthetic stone is formed by taking broken stones of the natural stone as the raw material and adding adhesives and the like through pressurization and polishing, and the stone material has become one of important raw materials for building, decoration, road and bridge construction as the development of building design. Cutting and grinding are indispensable procedures in the stone production process. Among the typical or common prior art techniques for stone grinding and polishing are:

CN109277919A discloses a polisher that structural design is reasonable, the operation is simple and easy, can polish the material automatically, which comprises a frame, be provided with unloader, grinding mechanism in the frame according to the assembly line, grinding mechanism is including the grinding wheel machine that is used for polishing a plurality of transversal arrangement of material side, a plurality of vertical arrangement's the grinding wheel machine, the conveyer that are used for polishing material upper and lower both ends face, grinding wheel machine edge conveyer set up in the frame, grinding wheel machine includes two grinding wheels, base, the grinding wheel slidable set up in on the base, the grinding wheel with be provided with the first elasticity that makes two grinding wheels reset between the base and reset, be provided with the drive on the base grinding wheel pivoted first drive arrangement. Another classic such as CN101934488A discloses a sander comprising: the top of the case is an operating platform; a power part disposed in the cabinet; the power transmission part is arranged in the case, and a power input end of the power transmission part is connected with a power output end of the power part; and the grinding wheel is arranged in the case and is connected with the power output end of the power transmission part. It is also known, for example, from EP0678359a1 to disclose an optical connector end polisher that includes a mounting block for supporting the hub stock, a manual slide and cam mechanism for supporting the optical connector. The fixed block is provided with a base for mounting a wheel spindle. The base has a guide space and a guide opening the manual slider has a horizontal bin column and a holder horizontal bin installed in the guide space of the base and restricted from moving in a vertical direction while moving along a horizontal plane; the post is embedded in and moves with the horizontal blank; it extends upright through the guide opening of the base; an idler gear is provided between the inner periphery of the guide hole and the outer periphery of the column to guide the column along the inner periphery. The retainer is fixed to the post at its intermediate position and holds the optical connector with its tip pressed vertically against the spindle bracket.

In summary, after a large number of searches by the applicant, at least in the field, the traditional material grinding is manually performed through a grinder, because the grinder has a high rotation speed, the operation speed of an operator needs to be fast and uniform, excessive grinding of the material is prevented, a certain experience is required for the operator, only one surface of the material can be ground at a time in the grinding process, the grinding efficiency is low, because the thickness of the material is small, the hand of the operator is close to the grinder rotating at a high speed in the grinding process, the operator needs to pay high attention in the grinding process, because the operation process is single and dry, long-time work is easy to feel fatigue, meanwhile, ground grinding dust can float in the air to harm the health of the human body, and therefore, the operation process has great health risks for the operator. And the existing polisher can only polish linear planes, cannot polish multidimensional nonlinearity, cannot meet the polishing requirements of irregular stones, and can not polish different degrees of the surfaces of the stones. Therefore, the existing sander cannot meet the needs of the user.

Accordingly, there is a need to develop or improve a non-linear stone sander.

Disclosure of Invention

The object of the present invention is to provide a non-linear stone sander to solve the problems described.

In order to achieve the purpose, the invention adopts the following technical scheme:

a nonlinear stone polisher is characterized by comprising a rack and a polishing device arranged on one side of the rack; the frame is provided with a conveying assembly for conveying stone; a plurality of press roller devices for limiting the movement state of the stone are arranged above the conveying assembly; the compression roller device comprises an adjusting frame; the adjusting frame is provided with a plurality of roller blocks which can rotate relative to the adjusting frame; a conveying space for placing stones is formed between the roller block and the conveying assembly; the conveying space is sequentially provided with a feeding area, a polishing area and a feeding area along the conveying direction of the stone; the roller blocks are far away from and close to the conveying assembly and are pressed on the stone; the polishing device comprises a swing arm block, a driving assembly for driving the swing arm block to move up and down and a polishing head capable of rotating relative to the swing arm block; the polishing part of the polishing head is positioned in the polishing area.

Preferably, the delivery assembly comprises a base; the base is provided with a feeding roller capable of rotating relative to the base; and a belt which moves circularly is sleeved on the feeding roller.

Preferably, the adjusting frame is an L-shaped adjusting frame; the L-shaped adjusting frame comprises a supporting part and an adjusting part which are vertical to each other; the supporting part is arranged vertically; the adjusting part spans above the conveying assembly; the adjusting part is provided with a sliding chute; a hanging rack capable of reciprocating along the guide direction of the sliding chute is arranged in the sliding chute; the roller block is rotatably connected to the hanging rack.

Preferably, the movement direction of the hanger is parallel to the length direction of the adjusting part.

Preferably, the movement direction of the hanger is parallel to the length direction of the support portion.

Preferably, the hanging rack comprises a sliding block and a front arm block which are connected in the sliding groove in a sliding manner; one end part of the sliding block, which is positioned outside the sliding chute, is provided with a through hole; the central axis of the through hole is parallel to the length direction of the supporting part; the front arm block comprises a mounting part for mounting the roller block; a connecting shaft extends from the top of the mounting part; the connecting shaft is inserted in the through hole in a sliding mode.

Preferably, a limiting block for controlling the motion state of the front arm block is arranged on one side of the sliding block; one end of the limiting block penetrates through the sliding block and is located in the through hole, and the limiting block is abutted to the connecting shaft.

Preferably, the driving assembly comprises a straight line module arranged vertically; the moving end of the linear module is connected with the swing arm block; the swing arm block is connected with a rotary cylinder; the output end of the rotary cylinder is connected with the polishing head.

Preferably, the sanding head includes a housing; a cavity is arranged in the shell; the shell is provided with an opening communicated with the cavity; rotating rollers are arranged at two ends of the opening; a polishing belt which is used for polishing and can move circularly is sleeved on the rotating roller; the polishing head also comprises a driving block for driving the rotating roller to operate; the driving block is a servo motor.

Preferably, the base is provided with a plurality of first inductive probes for sensing the position of the stone and second inductive probes for detecting the outer contour of the stone; the first induction probe is in communication connection with the conveying assembly; the second inductive probe is in communication connection with the polishing device.

The beneficial effects obtained by the invention are as follows:

1. the stone polishing machine has high automation degree, and the running state of the conveying assembly and the polishing position of the polishing device are controlled by insisting on the position and the outer contour of a stone through various induction probes, so that the traditional manpower is replaced, the working efficiency is improved, and an operator with certain experience is replaced by an intelligent module.

2. The polishing head can polish stone in a multi-dimensional nonlinear way under the control of the rotary cylinder and the driving assembly, so that the polishing effect and the polishing shape required by people are achieved.

3. The problem of dust harm to human bodies is solved, and the experience of users is improved.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

FIG. 1 is a top view of a non-linear stone sander according to embodiments 1-2 of the present invention;

FIG. 2 is a schematic structural diagram of a non-linear stone sander according to embodiments 1-2 of the present invention;

FIG. 3 is a schematic structural view of a polishing head of a nonlinear stone polishing machine according to embodiments 1 to 2 of the present invention;

FIG. 4 is a second schematic structural diagram of a non-linear stone sander in embodiments 1-2 of the present invention;

fig. 5 is a third schematic structural diagram of a nonlinear stone sander in embodiments 1-2 of the present invention.

Description of reference numerals: 1-a frame; 2-grinding device; 21-a swing arm block; 22-a polishing head; 3-a conveying assembly; 31-a base; 32-a feed roller; 33-a belt; 4-a press roll device; 5-an adjusting frame; 51-a support; 52-an adjustment section; 53-chute; 6-roller block; 7-a hanger; 71-a slider; 72-forearm block; 721-a mounting part; 722-a connecting shaft; 8-a linear module; 9-a housing; 10-a turning roll; 11-a first inductive probe; 12-a second inductive probe; 13-polishing belt.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.

The first embodiment is as follows:

as shown in fig. 1 to 5, a non-linear stone sander comprises a frame 1 and a sanding device 2 disposed on one side of the frame 1; the frame 1 is provided with a conveying assembly 3 for conveying stone; a plurality of press roller devices 4 used for limiting the movement state of the stone are arranged above the conveying assembly 3; the compression roller device 4 comprises an adjusting frame 5; a plurality of roller blocks 6 which can rotate relative to the adjusting frame 5 are arranged on the adjusting frame; a conveying space for placing stones is formed between the roller block 6 and the conveying assembly 3; the conveying space is sequentially provided with a feeding area, a polishing area and a feeding area along the conveying direction of the stone; the roller blocks 6 are far away from and close to the conveying assembly 3 and are pressed on the stone; the grinding device 2 comprises a swing arm block 21, a driving assembly for driving the swing arm block 21 to move up and down and a grinding head 22 capable of rotating relative to the swing arm block 21; the sanding portion of sanding head 22 is located within the sanding area.

As shown in fig. 2, in order to improve the stone conveying capability and ensure the stone conveying stability, the conveying assembly 3 of this embodiment 2 includes a base 31; the base 31 is provided with a feeding roller 32 which can rotate relative to the base; the feed roller 32 is sleeved with a belt 33 which moves circularly.

As shown in fig. 4, in order to ensure that the stone is not easy to shift during polishing and ensure polishing precision, the adjusting frame 5 in this embodiment 2 is an L-shaped adjusting frame; the L-shaped adjusting bracket comprises a supporting part 51 and an adjusting part 52 which are perpendicular to each other; the supporting part 51 is vertically arranged; the adjusting portion 52 spans over the conveying assembly 3; the adjusting part 52 is provided with a chute 53; a hanging rack 7 capable of reciprocating along the guiding direction of the sliding chute 52 is arranged in the sliding chute 53; the roller block 6 is rotatably connected to the hanging rack 7; the moving direction of the hanging rack 7 is parallel to the length direction of the adjusting part 52; the movement direction of the hanger 7 may also be parallel to the length direction of the support portion 51.

As shown in fig. 2 and 4, the hanging rack 7 in this embodiment 2 includes a sliding block 71 and a front arm block 72 slidably connected in the sliding slot 53; a through hole is formed in one end part, located outside the sliding groove 53, of the sliding block 71; the central axis of the through hole is parallel to the length direction of the support part 51; the front arm block 72 includes a mounting portion 721 for mounting the roller block 6; a connecting shaft 722 extends from the top of the mounting part 721; the connecting shaft 722 is inserted into the through hole in a sliding manner.

In addition, in order to ensure that the stone does not deviate from the conveying path and ensure the stability in the polishing process, a limiting block for controlling the motion state of the front arm block 72 is arranged on one side of the sliding block 71 in the embodiment 2; one end of the limiting block penetrates through the sliding block 71 and is located in the through hole, and is abutted against the connecting shaft 722.

As shown in fig. 3, in order to implement the nonlinear grinding and multidimensional grinding of the stone material by the grinding head, the driving assembly in this embodiment 2 includes a straight line module 8 arranged vertically; the moving end of the linear module 8 is connected with the swing arm block 21; the swing arm block 21 is connected with a rotary cylinder; the output end of the rotary cylinder is connected with the sanding head 22.

In order to ensure the polishing effect and satisfy the polishing requirements for stones with different shapes, the polishing head 22 in this embodiment 2 includes a housing 9; a cavity is arranged in the shell 9; the housing 9 is provided with an opening communicating with the cavity; rotating rollers 10 are arranged at two ends of the opening; a grinding belt 13 which is used for grinding and can move circularly is sleeved on the rotating roller 10; the sanding head 22 further comprises a driving block for driving the operation of the rotating roller 10; the driving block is a servo motor.

As shown in fig. 1 and 4, in order to improve the automation degree, completely replace the traditional manual work, and ensure the polishing quality, a plurality of first inductive probes 11 for sensing the position of the stone and second inductive probes 12 for detecting the outer contour of the stone are arranged on the base in this embodiment 2; the first induction probe 11 is in communication connection with the conveying assembly 3; the second inductive probe 12 is in communication with the polishing device 2.

This embodiment 2 replaces the conventional manual work by providing the conveying assembly 3, the driving assembly and the polishing head 22, thereby realizing the automated production. Wherein, in order to realize the automation degree comprehensively, the device is also provided with a control system and a display screen which is in communication connection with the control system; the polishing head 22 is also provided with a camera; the camera faces the stone; the control system comprises an information storage module, an image display module and an image comparison module; the second inductive probe 12 and the camera both send communication signals to a storage module for storage; the image realization module converts the electric signals from the second induction probe 12 and the camera into image signals, sends the image signals to the image comparison module, compares the image signals with target images arranged in the image comparison module in advance, finds out difference images and displays the difference images on a display screen, and simultaneously sends the difference images to the driving assembly, the conveying assembly 3 and the rotary cylinder so as to control the polishing head 22 to polish.

Firstly, placing a stone to be polished in a feeding area, and adjusting a compression roller device 4 positioned above a conveying assembly 3 to ensure that a roller block 6 on the compression roller device 4 is pressed on the upper surface of the stone, and the lower surface of the stone is attached to a belt of the conveying assembly 3; further, the conveying component 3 is started, the belt 33 operates circularly, and the stone enters the polishing area under the assistance of the roller block 6; a first induction probe 11 in the feeding area induces the position of the stone and transmits an electric signal to a driving assembly; further, the drive assembly controls the sanding head 22 to lift; further, a second induction probe 12 positioned in the polishing area detects the stone profile and converts the stone profile into an electric signal to be matched with an operating system, then the difference of the matching signal is transmitted to a rotary cylinder, and the rotary cylinder polishes the stone according to the signal until the outer profile of the stone is consistent with the image in the operating system; further, the polished stone is continuously conveyed to a feeding area by the conveying assembly 3, and the stone is processed.

Example two:

As shown in fig. 2, in order to improve the stone conveying capability and ensure the stone conveying stability, the conveying assembly 3 of this embodiment 1 includes a base 31; the base 31 is provided with a feeding roller 32 which can rotate relative to the base; the feed roller 32 is sleeved with a belt 33 which moves circularly.

As shown in fig. 4, in order to ensure that the stone is not easy to shift during polishing and ensure polishing precision, the adjusting frame 5 in this embodiment 1 is an L-shaped adjusting frame; the L-shaped adjusting bracket comprises a supporting part 51 and an adjusting part 52 which are perpendicular to each other; the supporting part 51 is vertically arranged; the adjusting portion 52 spans over the conveying assembly 3; the adjusting part 52 is provided with a chute 53; a hanging rack 7 capable of reciprocating along the guiding direction of the sliding chute 52 is arranged in the sliding chute 53; the roller block 6 is rotatably connected to the hanging rack 7; the moving direction of the hanging rack 7 is parallel to the length direction of the adjusting part 52; the movement direction of the hanger 7 may also be parallel to the length direction of the support portion 51.

As shown in fig. 2 and 4, the hanging rack 7 in embodiment 1 includes a sliding block 71 and a front arm block 72 slidably connected in the sliding groove 53; a through hole is formed in one end part, located outside the sliding groove 53, of the sliding block 71; the central axis of the through hole is parallel to the length direction of the support part 51; the front arm block 72 includes a mounting portion 721 for mounting the roller block 6; a connecting shaft 722 extends from the top of the mounting part 721; the connecting shaft 722 is inserted into the through hole in a sliding manner.

In addition, in order to ensure that the stone does not deviate from the conveying path and ensure the stability in the polishing process, a limiting block for controlling the motion state of the front arm block 72 is arranged on one side of the sliding block 71 in the embodiment 1; one end of the limiting block penetrates through the sliding block 71 and is located in the through hole, and is abutted against the connecting shaft 722.

As shown in fig. 3, in order to implement the nonlinear grinding and multidimensional grinding of the stone material by the grinding head, the driving assembly in this embodiment 1 includes a straight line module 8 arranged vertically; the moving end of the linear module 8 is connected with the swing arm block 21; the swing arm block 21 is connected with a rotary cylinder; the output end of the rotary cylinder is connected with the sanding head 22.

In order to ensure the polishing effect and satisfy the polishing requirements of stones with different shapes, the polishing head 22 in the embodiment 1 includes a housing 9; a cavity is arranged in the shell 9; the housing 9 is provided with an opening communicating with the cavity; rotating rollers 10 are arranged at two ends of the opening; a polishing belt 10 which is used for polishing and can move circularly is sleeved on the rotating roller 10; the sanding head 22 further comprises a driving block for driving the operation of the rotating roller 10; the driving block is a servo motor.

As shown in fig. 1 and 4, in order to improve the automation degree, completely replace the traditional manual work, and ensure the polishing quality, a plurality of first inductive probes 11 for sensing the position of the stone and second inductive probes 12 for detecting the outer contour of the stone are arranged on the base in this embodiment 1; the first induction probe 11 is in communication connection with the conveying assembly 3; the second inductive probe 12 is in communication with the polishing device 2.

This embodiment 1 replaces the conventional manual work by providing the conveying assembly 3, the driving assembly and the polishing head 22, thereby realizing automated production.

Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.

Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.

It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.

Claims

1. A nonlinear stone polisher is characterized by comprising a rack and a polishing device arranged on one side of the rack; the frame is provided with a conveying assembly for conveying stone; a plurality of press roller devices for limiting the movement state of the stone are arranged above the conveying assembly; the compression roller device comprises an adjusting frame; the adjusting frame is provided with a plurality of roller blocks which can rotate relative to the adjusting frame; a conveying space for placing stones is formed between the roller block and the conveying assembly; the conveying space is sequentially provided with a feeding area, a polishing area and a feeding area along the conveying direction of the stone; the roller blocks are far away from and close to the conveying assembly and are pressed on the stone; the polishing device comprises a swing arm block, a driving assembly for driving the swing arm block to move up and down and a polishing head capable of rotating relative to the swing arm block; the polishing part of the polishing head is positioned in the polishing area; the adjusting frame is an L-shaped adjusting frame; the L-shaped adjusting frame comprises a supporting part and an adjusting part which are vertical to each other; the supporting part is arranged vertically; the adjusting part spans above the conveying assembly; the adjusting part is provided with a sliding chute; a hanging rack capable of reciprocating along the guide direction of the sliding chute is arranged in the sliding chute; the roller block is rotationally connected to the hanging rack; the motion direction of the hanging rack is parallel to the length direction of the adjusting part; the motion direction of the hanging rack is parallel to the length direction of the supporting part; the hanging rack comprises a sliding block and a front arm block which are connected in the sliding groove in a sliding manner; one end part of the sliding block, which is positioned outside the sliding chute, is provided with a through hole; the central axis of the through hole is parallel to the length direction of the supporting part; the front arm block comprises a mounting part for mounting the roller block; a connecting shaft extends from the top of the mounting part; the connecting shaft is inserted in the through hole in a sliding manner; a limiting block for controlling the motion state of the front arm block is arranged on one side of the sliding block; one end of the limiting block penetrates through the sliding block, is positioned in the through hole and is abutted against the connecting shaft; the delivery assembly includes a base; the base is provided with a feeding roller capable of rotating relative to the base; a belt which moves circularly is sleeved on the feeding roller; the driving assembly comprises straight line modules which are vertically arranged; the moving end of the linear module is connected with the swing arm block; the swing arm block is connected with a rotary cylinder; the output end of the rotary cylinder is connected with the polishing head; the base is provided with a plurality of first inductive probes for sensing the position of the stone and second inductive probes for detecting the outer contour of the stone; the first induction probe is in communication connection with the conveying assembly; the second induction probe is in communication connection with the polishing device; the device is also provided with a control system and a display screen in communication connection with the control system; the polishing head is also provided with a camera; the camera faces the stone; the control system comprises an information storage module, an image display module and an image comparison module; the second induction probe and the camera both send communication signals to a storage module for storage; the image realization module converts electric signals from the second sensing probe and the camera into image signals, sends the image signals to the image comparison module, compares the image signals with target images which are arranged in the image comparison module in advance, finds out difference images and displays the difference images on a display screen, and simultaneously sends the difference images to the driving assembly, the conveying assembly and the rotary cylinder so as to control the polishing head to polish.

2. The non-linear stone sander as set forth in claim 1, wherein the sanding head comprises a housing; a cavity is arranged in the shell; the shell is provided with an opening communicated with the cavity; rotating rollers are arranged at two ends of the opening; a polishing belt which is used for polishing and can move circularly is sleeved on the rotating roller; the polishing head also comprises a driving block for driving the rotating roller to operate; the driving block is a servo motor.