CN217122777U - Paint surface reciprocating grinding and polishing sand paper system - Google Patents

Abstract

The utility model provides a paint surface reciprocating polishing sand paper system, belonging to the polishing field, which comprises a mechanical hand; the polishing part is connected to the head end of the robot hand body and is used for polishing the paint surface of the workpiece under the driving of the robot hand body so as to control the removal depth of the paint surface, and the polishing part comprises a polishing assembly and a driving mechanism for driving the polishing assembly; the automatic portion of changing of abrasive paper for change the abrasive paper that polishes to the work piece finish in the subassembly of polishing, wherein, the subassembly of polishing is including installing the abrasive paper in the actuating mechanism bottom surface and running through actuating mechanism's the power of polishing accuse unit, and the power of polishing accuse unit is controlled the motor and is installed in the flange with this body coupling of robot, and the power of polishing accuse unit can be based on the surperficial complex condition of work piece, realizes the flexibility and polishes to the finish. Through the processing scheme of this application, can control the technological parameter of polishing accurately, realize the accurate polishing of lacquer painting.

Description

Paint surface reciprocating grinding and polishing sand paper system

Technical Field

The utility model relates to a grind and throw the field, concretely relates to sand paper system is thrown to reciprocal grinding of lacquer painting.

Background

With the development of lightweight of automobiles and aviation, carbon fiber materials are more and more widely applied in the fields of automobiles and aviation due to light weight and high strength. Because most of carbon fiber parts are appearance parts, the requirements on the surfaces of the parts are higher and higher, the current production and manufacturing process mainly depends on manual work to polish the paint surfaces of the carbon fiber parts, the polishing difficulty is high, the environment is severe, and the product consistency is poor. The existing reciprocating polishing sand paper equipment is mainly realized by installing a pneumatic manual reciprocating polishing machine under a floating cylinder, and the existing reciprocating polishing sand paper equipment is difficult to control in rotating speed of a pneumatic tool, has low universal power and very easy stall, and is difficult to be competent at the current equipment for a scene with strict polishing quality requirement, such as a paint surface.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to overcome the shortcoming of the prior art, the utility model provides a technological parameter that accurate ground control ground was thrown realizes the reciprocal abrasive paper system of throwing that grinds of the accurate lacquer finish of throwing that grinds of lacquer finish.

In order to realize the above object, the utility model provides a sand paper system is thrown to reciprocal mill of finish, include: the robot hand is provided with a numerical control base and a robot hand body arranged on the numerical control base, and the tail end of the robot hand body is connected with the numerical control base; the polishing part is connected to the head end of the robot hand body and is used for polishing the paint surface of the workpiece under the driving of the robot hand body so as to control the removal depth of the paint surface, and the polishing part comprises a polishing assembly and a driving mechanism for driving the polishing assembly; the automatic portion of changing of abrasive paper is used for changing it is right in the subassembly of polishing the work piece finish coat carries out the abrasive paper of polishing, wherein, the subassembly of polishing is including installing the abrasive paper of actuating mechanism bottom surface and running through actuating mechanism's the power of polishing accuse unit, the power of polishing accuse unit control the motor install with in this body coupling of robot flange, the power of polishing accuse unit can realize the flexibility and polish to the finish coat according to the surperficial complex condition of work piece.

In one embodiment, the drive mechanism comprises: the reciprocating deflection component is used for driving the polishing component to polish the paint surface of the workpiece in a reciprocating manner; the follow-up lifting assembly is used for carrying out floating lifting on the polishing assembly; and the power transmission assembly is used for driving the reciprocating deflection assembly and the follow-up lifting assembly.

In one embodiment, the servo lifting assembly comprises a transmission sleeve for receiving the rotary power transmitted by the power transmission assembly, a transmission shaft rotating coaxially with the transmission sleeve, and a needle roller guide bearing for driving the transmission shaft to slide up and down, wherein the needle roller guide bearing is provided with a cavity for accommodating the transmission shaft.

In one embodiment, the reciprocating deflection assembly comprises a deflection wheel, a deflection rod, a reciprocating plate and a miniature guide rail, and the deflection wheel receives the rotating power transmitted by the transmission shaft of the follow-up lifting assembly; one end of the deflection oscillating bar is connected with the deflection balance wheel, and the other end of the deflection oscillating bar is fixed on the reciprocating plate; the reciprocating plate reciprocates along the miniature guide rail; the grinding assembly comprises sand paper arranged on the bottom surface of the reciprocating plate and a grinding force control unit arranged on the other side surface of the reciprocating plate.

In one embodiment, the automatic sandpaper replacing unit includes: a work table; the abrasive paper peeling mechanism is arranged on the upper surface of the workbench and positioned on one side of the workbench, and is provided with a belt which can be in contact with the abrasive paper of the grinding assembly and a peeling assembly which peels the abrasive paper on the belt from one side of the grinding assembly; the sand paper mounting mechanism is positioned on the other side of the workbench and comprises a positioning component positioned on the upper surface of the workbench and used for positioning the grinding component and a sand paper mounting component positioned in the workbench and used for mounting the sand paper; and the pneumatic control mechanism is arranged in the workbench and used for driving the sand paper peeling mechanism and the sand paper mounting mechanism.

In one embodiment, the sandpaper peeling mechanism comprises: the belt sliding assembly is provided with a belt abutted against the lower surface of the abrasive paper, a supporting plate positioned below the belt and used for supporting the downward pressure of the grinding assembly, and a tensioning roller and a directional roller which are arranged at two ends of the supporting plate and used for tensioning the belt in a matched manner; and the peeling assembly is arranged above the belt and close to one side of the tensioning roller and is provided with a sand paper peeling plate which is in contact with the upper surface of the sand paper.

In one embodiment, the tensioning roller comprises a tensioning roller central shaft fixed on the workbench, a tensioning roller sleeve sleeved on the tensioning roller central shaft, and a tensioning roller bearing supporting the tensioning roller sleeve to rotate, and the outer surface of the tensioning roller sleeve is provided with a slope.

In one embodiment, the stripping assembly comprises: a sand paper stripping plate which is fixed on the workbench, is in contact with the upper surface of the sand paper and is provided with an inverted hook for stripping the sand paper; and the cleaning spray head is used for cleaning the stripped sand paper.

In one embodiment, the positioning assembly comprises a positioning vertical rod capable of sliding on the upper surface of the workbench, a telescopic cylinder arranged close to the edge of the workbench and used for driving the positioning vertical rod to move, and a stopper stop block matched with the positioning vertical rod for limiting.

In one embodiment, the sandpaper mounting assembly comprises a lifting plate for replacing sandpaper, a lifting cylinder fixed inside the workbench for driving the lifting plate, a guide rod and a guide sleeve for guiding the lifting plate to lift, and a support rod for fixing the lifting plate inside the workbench.

Compared with the prior art, the utility model has the advantages of: adopt motor drive's mode to carry out the accurate control of reciprocating frequency, and the motor setting is in the flange with this body coupling of manipulator, do not occupy flexible power accuse terminal load, the restriction of having solved flexible power accuse terminal instrument weight and making flexible power accuse terminal load light, can accurate control power output below 10N and undistorted, can be very good arbitrary to the scene that the depth of lacquer finish removal required is high, and select required motor power and need not consider the restriction of flexible power accuse to motor weight according to the practical application operating mode, can be equipped with flexible power accuse, technological parameter that can accurate control was ground and thrown, realize the accurate mill and throw of lacquer finish, guarantee the stability and the uniformity of product. Moreover, the system is also provided with an automatic sand paper replacing part, so that the sand paper can be automatically replaced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a system for reciprocally polishing and polishing sandpaper on a painted surface according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a polishing portion in an embodiment of the present invention;

fig. 3 is a schematic structural view of a polishing portion in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a servo lifting assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a reciprocating yaw assembly according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of an automatic sand paper replacing portion according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a sandpaper peeling mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a sandpaper peeling mechanism peeling sandpaper in an embodiment of the present invention;

fig. 9 is a schematic structural view of a belt sliding assembly according to an embodiment of the present invention;

FIG. 10 is a schematic view of an embodiment of the present invention with the belt slip assembly removed;

FIG. 11 is a schematic structural view of a stripping assembly in an embodiment of the invention;

fig. 12 is a schematic structural view of a sandpaper mounting mechanism according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a positioning assembly according to an embodiment of the present invention;

figure 14 is a schematic diagram of a sandpaper mounting assembly in an embodiment of the present invention.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number and aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the mechanisms related to the present application, not the number, shape and size of the mechanisms in practical implementation, the form, number and ratio of each mechanism in practical implementation can be changed freely, and the mechanism layout may be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that aspects may be practiced without these specific details.

As shown in fig. 1, the present application provides a system for reciprocally polishing and sanding coated abrasive paper, which includes a robot arm 1, a sanding section 2, and an automatic sandpaper changing section 3.

The robot hand 1 is located the top of portion of polishing 2, and the effect of robot hand 1 is for driving portion of polishing 2 free motion. The robot 1 is provided with a numerical control base and a robot body arranged on the numerical control base, and the tail end of the robot body is connected with the numerical control base. The numerical control base is in communication connection with a driving mechanism in the polishing part 2, can be in communication connection with the driving mechanism through a wireless module, and can also be in communication connection with the driving mechanism through an electric wire arranged in the robot hand body. The wireless module can be a Bluetooth module, an infrared module, a wifi module, a zigbee module and the like. The numerical control base drives the polishing part 2 to move freely, and controls the driving mechanism to move the polishing assembly, so that the polishing part 2 is ensured to correspond to the paint surface of the workpiece to be polished in real time.

The polishing portion 2 functions to polish the finish of the surface of the workpiece. The polishing part 2 is connected to the head end of the manipulator body and used for polishing the paint surface of the workpiece under the driving of the manipulator body, so that the removal depth of the paint surface is controlled, and the polishing part comprises a polishing assembly and a driving mechanism for driving the polishing assembly. The sanding assembly includes sandpaper 19 mounted on the bottom surface of the drive mechanism and a sanding force control unit 21 extending through the drive mechanism. The power control motor of the polishing power control unit 21 is installed in a flange connected with the robot hand body, and the polishing power control unit 21 can flexibly polish the paint surface according to the surface complex condition of a workpiece.

As shown in fig. 2, in one embodiment, the drive mechanism includes a power transmission assembly 300, a follower lift assembly 400, and a reciprocating yaw assembly 500.

The reciprocating deflection component 500 is used for driving the grinding component to grind the paint surface of the workpiece in a reciprocating mode.

And the follow-up lifting assembly 400 is used for carrying out floating lifting on the grinding assembly.

And a power transmission assembly 300 for driving the reciprocating yaw assembly and the follow-up lift assembly. As shown in fig. 3, in one embodiment, power transmission assembly 300 includes a transmission motor 6, a drive pulley 7, a driven pulley 8, and a transmission belt 10. The output shaft of drive motor 6 is connected with action wheel 7, and action wheel 7 passes through drive belt 10 with follow driving wheel 8 and is connected, and drive motor 6 drives action wheel 7 and drive belt 10 rotation to give power transmission from driving wheel 8. The driven wheel 8 is connected with the follow-up elevating assembly 400. In one embodiment, power transmission assembly 300 further includes an idler assembly 9. The primary function of the idler pulley assembly 9 is to compress the belt 10 so that the belt 10 is always in a tightened condition, allowing for more stable kinetic energy transfer. Idler assembly 9 may be a tab or strip secured to the end face. In one embodiment, the follower elevating assembly 400 includes a driving sleeve 12 for receiving the rotational power transmitted from the power transmission assembly, a driving shaft 14 rotating coaxially with the driving sleeve, and a needle guide bearing 13 for driving the driving shaft to slide up and down, the needle guide bearing 13 having a hollow for receiving the driving shaft.

In another embodiment, as shown in FIG. 4, the follower lift assembly 400 includes a shoe bearing 11, a drive sleeve 12, a needle guide bearing 13, a drive shaft 14, and a needle thrust bearing block 15. Rotational power is transmitted from the driven wheel 8 to the driving sleeve 12 and then to the driving shaft 14. The transmission shaft 14 slides up and down through the needle guide bearing 13 mounted at the lower end of the transmission sleeve 12, and the inside of the needle guide bearing 13 is a polygonal inner cavity. In one example, a roller pin is provided between the inner wall of the roller guide bearing 13 and the transmission shaft 14, and the roller pin reduces friction force of up-and-down sliding. The transmission shaft 14 is also of a polygonal structure corresponding to the inner cavity of the needle guide bearing 13, thereby enabling efficient power transmission. In one embodiment, two deep groove ball bearings may be embedded in the rolling bearing 11, and a plane bearing and a needle roller bearing are embedded in the needle roller thrust bearing seat 15, so that the yawing force in the rotation direction can be effectively controlled, and the assembly can stably operate.

As shown in fig. 5, in one embodiment, reciprocating yaw assembly 500 includes yaw wheel 16, yaw bar 17, reciprocating plate 18, and micro-guide 20. The balance 16 receives the rotational power transmitted from the drive shaft 14 of the follower elevating assembly 400. One end of the deflection swing rod 17 is connected with the deflection balance wheel 16, and the other end is fixed on the reciprocating plate 18. The reciprocating plate 18 reciprocates along the micro rail 20. One end of the deflection oscillating bar 17 is fixed on the deflection balance wheel 16, the other end is fixed on the reciprocating plate 18, and the left side and the right side of the reciprocating plate 18 are provided with miniature guide rails 20, so that a three-link assembly is formed, and the reciprocating plate 18 is ensured to reciprocate back and forth. The grinding assembly comprises sand paper arranged on the bottom surface of the reciprocating plate and a grinding force control unit arranged on the other side surface of the reciprocating plate.

The automatic portion 3 of changing of abrasive paper is for the automatic abrasive paper of changing on the portion 2 of polishing, reduces artifical the participation, improves work efficiency. The automatic sand paper replacing part 3 is used for replacing sand paper used for polishing the paint surface of the workpiece in the polishing assembly.

Above-mentioned sand paper system is thrown to reciprocal mill of finish, adopt motor drive's mode to carry out the accurate control of reciprocating frequency, and the motor sets up in the flange of being connected with the manipulator body, do not occupy flexible power accuse terminal load, the restriction of having solved flexible power accuse terminal instrument weight and having made flexible power accuse terminal load light, can accurate control below 10N power output and undistorted, can be very successful to the finish and get rid of the scene that the degree of depth required is high, and select required motor power and need not consider the restriction of flexible power accuse to motor weight according to the practical application operating mode, can be equipped with flexible power accuse, technological parameter that can accurate control the mill and throw, realize the accurate mill and throw of finish, guarantee the stability and the uniformity of product. Moreover, the system is also provided with an automatic sand paper replacing part, so that the sand paper can be automatically replaced.

As shown in fig. 6, in one embodiment, the automatic sandpaper replacing unit includes a table 22, a sandpaper peeling mechanism 23, a sandpaper mounting mechanism 24, and a pneumatic control mechanism 25.

And a table 22 for holding the sandpaper peeling mechanism 23, the sandpaper mounting mechanism 24, and the pneumatic control mechanism 25.

The sandpaper peeling mechanism 23 is provided on the upper surface of the table on one side of the table, and has a belt contactable with the sandpaper of the grinding assembly and a peeling assembly for peeling the sandpaper on the belt from the grinding assembly side.

In one embodiment, as shown in fig. 7 and 8, the sandpaper stripping mechanism includes a belt slide assembly 26 and a stripping assembly 27. When the sanding abrasive paper 19 is replaced, the sanding abrasive paper 19 is tightly attached to the belt sliding assembly 26 due to the force applied to the abrasive paper 19 by the sanding force control unit 21 of the sanding part 2, and when the sanding part 2 moves to the right in fig. 8, the peeling assembly 27 can hook the root of the sanding abrasive paper 19 to peel off the waste sanding abrasive paper 19 from the sanding part 2.

In one embodiment, as shown in fig. 9 and 10, the belt slide assembly 26 has a belt 31 abutting the lower surface of the sandpaper, a carrier plate 30 located below the belt 31 for supporting the downward pressure of the sanding assembly, a tensioning roller 28 and a directional roller 29 disposed at both ends of the carrier plate 30 for engaging the tensioning belt. The tension roller 28 and the orientation roller 29 at the front and rear ends of the slide belt 31 can keep the slide belt 31 in a tension state all the time and can slide linearly in opposite directions. A pallet 30 is located between the tensioning roller 28 and the orienting roller 29 and may act to support the downward pressure of the sanding section 2. In one embodiment, grease is provided between the sliding belt 31 and the pallet 30 to better reduce friction.

In one embodiment, tension roller 28 includes a tension roller center shaft 33, a tension roller bushing 34, and a tension roller bearing 35. The outer surface of the tensioning roller sleeve 34 is tapered so that it is self-centering during the translational movement of the sliding belt 31. In one embodiment, fine adjustment screws are installed on the left and right sides of the tensioning roller 28 to facilitate installation and debugging by a debugging person. The shape of the tensioning roller sleeve 34 may be a constant width pattern or other irregular circular shape, such as a reuleaux triangle, etc. The orientation roller 29 comprises an orientation wheel middle shaft 32 and an orientation wheel bearing 36. So that the orientation cylinder 29 can follow the rotation movement when the sliding belt 31 performs the translational movement.

The peeling assembly 27 is disposed above the belt on a side close to the tension roller, and has a sandpaper peeling plate 37 in contact with an upper surface of the sandpaper. In one embodiment, the peeling assembly 27 includes a sandpaper peeling plate 37 and a cleaning spray head 39. The sandpaper peeling plate 37 is fixed to the table and contacts the upper surface of the sandpaper, and has barbs for peeling the sandpaper. The cleaning head 39 is used to clean the peeled sandpaper. In one embodiment, as shown in fig. 11, the automatic sandpaper replacing section 3 may further be provided with a photoelectric sensor 38 and a color sensor 40. The abrasive paper peeling plate 37 can peel off the translated grinding abrasive paper 19, the photoelectric sensor 38 can detect whether the waste grinding abrasive paper 19 falls off, if the waste grinding abrasive paper does not fall off, the grinding part 2 does translation repeatedly until the grinding is successful, or the equipment gives an alarm to remind a worker. The function of the cleaning jets 39 is to blow the stripped abrasive paper 19 down the equipment without the waste abrasive paper 19 getting stuck in the feed inlet area (i.e. the abrasive paper mounting area). The color sensor 40 detects whether the sanding paper 19 is successfully attached to the sanding part 2 after the new sanding paper is installed, and if the sanding paper is not successfully attached, the sanding part 2 repeats the action of attaching the sanding paper until the action is successful.

In one embodiment, as shown in FIG. 12, sandpaper mounting mechanism 24 is located on the opposite side of the table and includes a positioning assembly 41 located on the upper surface of the table for positioning the sanding assembly and a sandpaper mounting assembly 42 located within the interior of the table for mounting sandpaper.

The pneumatic control mechanism 25 is provided inside the table, and drives the sandpaper peeling mechanism and the sandpaper mounting mechanism.

As shown in fig. 13, in one embodiment, the positioning assembly 41 includes a positioning upright 46 slidable on the upper surface of the worktable, a telescopic cylinder 43 disposed near the edge of the worktable for driving the movement of the positioning upright, and a stopper 44 and a stopper 45 cooperating to limit the movement of the positioning upright. The telescopic shaft of the telescopic cylinder 43 is ejected, and the telescopic cylinder 43 stops acting because the stopper 44 abuts against the stopper 45, so that the positioning vertical rod 46 is ensured to move to the opposite position. The position of the stopper 44 is not fixed, and the stopper can be locked as required, and the position of the stopper 44 can be finely adjusted in the front-rear direction to position the polishing section 2 when the apparatus is set up.

As shown in fig. 14, in one embodiment, sandpaper mounting assembly 42 includes a lifting plate 50 for replacing sandpaper, a lifting cylinder 47 fixed inside the work table for driving the lifting plate, a guide bar 48 and a guide sleeve 49 for guiding the lifting of the lifting plate, and a support bar 51 for fixing the lifting plate inside the work table. The jacking cylinder 47 is connected to the jacking plate 50, and gives a push-pull force to the jacking plate 50 to extend and retract up and down. The guide sleeve 49 and the guide rod 48 play a role of guiding the linear lifting. The supporting rod 51 is connected with the whole sandpaper mounting assembly 42, and can also play a role in peripheral limiting in four directions, namely front, back, left and right, of the sanding sandpaper 19, so that the sanding sandpaper 19 is prevented from falling out of the sandpaper mounting assembly 42.

The pneumatic control mechanism 25 is located inside the workbench 22, and the independent pneumatic control mechanism 25 can facilitate debugging personnel to debug and maintain the equipment.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A system for reciprocally polishing and polishing sandpaper for painted surfaces, comprising:

the robot hand is provided with a numerical control base and a robot hand body arranged on the numerical control base, and the tail end of the robot hand body is connected with the numerical control base;

the polishing part is connected to the head end of the robot hand body and is used for polishing the paint surface of the workpiece under the driving of the robot hand body so as to control the removal depth of the paint surface, and the polishing part comprises a polishing assembly and a driving mechanism for driving the polishing assembly to reciprocate;

an automatic sand paper replacing part for replacing the sand paper used for polishing the paint surface of the workpiece in the polishing component,

the polishing assembly comprises abrasive paper arranged on the bottom surface of the driving mechanism and a polishing force control unit penetrating through the driving mechanism, a force control motor of the polishing force control unit is arranged in a flange connected with the manipulator body, and the polishing force control unit can flexibly polish the paint surface according to the surface complex condition of a workpiece.

2. A paint surface reciprocating abrasive polishing sandpaper system as set forth in claim 1, wherein said drive mechanism comprises:

the reciprocating deflection component is used for driving the polishing component to polish the paint surface of the workpiece in a reciprocating manner;

the follow-up lifting assembly is used for carrying out floating lifting on the polishing assembly;

and the power transmission assembly is used for driving the reciprocating deflection assembly and the follow-up lifting assembly.

3. A paint reciprocating sanding and polishing sandpaper system as defined in claim 2, wherein the follow-up lifting assembly comprises a driving sleeve for receiving the rotational power transmitted from the power transmission assembly, a transmission shaft rotating coaxially with the driving sleeve, and a needle roller guide bearing for driving the transmission shaft to slide up and down, the needle roller guide bearing having a cavity for receiving the transmission shaft.

4. A paint reciprocating abrasive polishing sandpaper system as claimed in claim 2, wherein said reciprocating yaw assembly comprises a yaw wheel, a yaw bar, a reciprocating plate and a micro-track,

the deflection wheel receives the rotating power transmitted by the transmission shaft of the follow-up lifting assembly; one end of the deflection oscillating bar is connected with the deflection balance wheel, and the other end of the deflection oscillating bar is fixed on the reciprocating plate; the reciprocating plate reciprocates along the miniature guide rail;

the grinding assembly comprises sand paper arranged on the bottom surface of the reciprocating plate and a grinding force control unit arranged on the other side surface of the reciprocating plate.

5. The system of claim 1, wherein the automated sandpaper changer comprises:

a work table;

the abrasive paper peeling mechanism is arranged on the upper surface of the workbench and positioned on one side of the workbench, and is provided with a belt which can be in contact with the abrasive paper of the grinding assembly and a peeling assembly which peels the abrasive paper on the belt from one side of the grinding assembly;

the sand paper mounting mechanism is positioned on the other side of the workbench and comprises a positioning component positioned on the upper surface of the workbench and used for positioning the grinding component and a sand paper mounting component positioned in the workbench and used for mounting the sand paper; and

and the pneumatic control mechanism is arranged in the workbench and used for driving the sand paper peeling mechanism and the sand paper mounting mechanism.

6. The system of claim 5, wherein the sandpaper stripping mechanism comprises:

the belt sliding assembly is provided with a belt abutted against the lower surface of the abrasive paper, a supporting plate positioned below the belt and used for supporting the downward pressure of the grinding assembly, and a tensioning roller and a directional roller which are arranged at two ends of the supporting plate and used for tensioning the belt in a matched manner;

and the peeling assembly is arranged above the belt and close to one side of the tensioning roller and is provided with a sand paper peeling plate which is in contact with the upper surface of the sand paper.

7. The system for grinding and polishing sand paper to paint surface in a reciprocating mode according to claim 6, wherein the tensioning roller comprises a tensioning wheel middle shaft fixed on the workbench, a tensioning roller sleeve sleeved on the tensioning wheel middle shaft and a tensioning wheel bearing supporting the tensioning roller sleeve to rotate, and the outer surface of the tensioning roller sleeve is provided with a slope.

8. The system of claim 6, wherein the stripping assembly comprises:

a sand paper stripping plate which is fixed on the workbench, is in contact with the upper surface of the sand paper and is provided with an inverted hook for stripping the sand paper;

and the cleaning spray head is used for cleaning the stripped sand paper.

9. A paint reciprocating polishing sandpaper system as claimed in claim 6, wherein the positioning assembly comprises a positioning vertical rod capable of sliding on the upper surface of the workbench, a telescopic cylinder arranged near the edge of the workbench and used for driving the positioning vertical rod to move, and a stopper stop which are matched to limit the positioning vertical rod.

10. A system for reciprocating sanding and polishing sandpaper according to claim 6, wherein the sandpaper mounting assembly includes a lifting plate for replacing sandpaper, a lifting cylinder fixed inside the worktable for driving the lifting plate, a guide rod and a guide sleeve for guiding the lifting of the lifting plate, and a support rod for fixing the lifting plate inside the worktable.

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