CN216802896U

CN216802896U - Constant force control polishing table

Info

Publication number: CN216802896U
Application number: CN202122956746.8U
Authority: CN
Inventors: 梁绍明; 欧浩基; 欧达华; 王勇杰; 梁为栋; 梁伟军; 陈丕立; 曾国梁
Original assignee: Guangdong Lingfeng Hardware Equipment Technology Co ltd
Current assignee: Guangdong Lingfeng Hardware Equipment Technology Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-06-24
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a constant force control polishing platform which is matched with a robot for use and comprises a horizontal movement assembly, a double-head polishing assembly and a pressure sensing device for detecting the pressure of the double-head polishing assembly; the double-head polishing component is arranged on the horizontal movement component and is controlled by the horizontal movement component to slide along the horizontal movement component, and two ends of the double-head polishing component are respectively provided with a polishing wheel; the pressure sensing device is installed on the horizontal movement assembly and is in signal connection with a control panel of the robot, and the pressure sensing device detects the grinding pressure of the double-head polishing assembly in real time and feeds the grinding pressure back to the horizontal movement assembly to compensate the double-head polishing assembly in front and back positions. The device provides constant grinding pressure for polishing, real-time compensation can be performed according to the change of an external track, and constant grinding force in the whole grinding process is ensured; can realize the automatic polishing to irregularly shaped pan, the pan surface texture that the processing was come out is clear even, and the uniformity is high, has improved the quality of polishing.

Description

Constant force control polishing table

Technical Field

The utility model relates to the technical field of metal pot surface treatment related equipment, in particular to a constant force control polishing table capable of maintaining and stabilizing polishing force and improving polishing precision.

Background

Most big grinding tables in the market can only realize single process of polishing at present to the precision of polishing is low, when meetting that pan surface circularity is inhomogeneous, the easy loss grinding apparatus of the unchangeable condition of dynamics of polishing and lead to the product quality of polishing uneven. In the robot field of polishing, because the accumulation of personnel debugging error, ordinary platform of polishing is difficult to realize automatic polishing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a constant-force control grinding table.

The utility model is realized by the following technical scheme: a constant force control polishing platform is matched with a robot for use and comprises a horizontal moving assembly, a double-head polishing assembly and a pressure sensing device for detecting the pressure of the double-head polishing assembly; the double-head polishing assembly is arranged on the horizontal moving assembly and is controlled by the horizontal moving assembly to slide along the horizontal moving assembly, and two ends of the double-head polishing assembly are respectively provided with a polishing wheel; pressure sensing device installs on the horizontal motion subassembly, pressure sensing device and the control panel of robot pass through signal connection, pressure sensing device real-time detection double-end polishing subassembly's the pressure of polishing and feedback to the horizontal motion subassembly is right the double-end polishing subassembly carries out the compensation of front and back position.

The horizontal motion subassembly can drive the double-end polishing subassembly and remove in the horizontal direction, and pressure sensing device can feed back pressure of polishing in real time, and this device can accomplish twice process at a machine, controls the pressure of polishing of the in-process of polishing through sensitive pressure sensor, has saved the use of polishing consumptive material furthest to polish out the product that the uniformity is high, of high quality, stable in quality, can cooperate the robot to realize the automatic polishing of the pan of different regular shapes and polish.

The horizontal movement assembly comprises an installation plate, and a servo motor, a ball screw, a first linear guide rail, a second linear guide rail and a screw rod support seat are respectively installed on the installation plate; one end of the ball screw is mounted on an output shaft of the servo motor through a coupler, the other end of the ball screw is fixed on the screw support seat through a bearing seat, and a nut seat is sleeved on the middle section of the ball screw; the first linear guide rail is positioned below the ball screw, a first sliding block is arranged on the first linear guide rail, and the bottom of the nut seat is fixed on the first sliding block; install the knee wall on the mounting panel respectively of first linear guide both sides, install respectively on the knee wall second linear guide, install the second slider on the second linear guide, double-end polishing subassembly bottom is installed on the second slider, nut seat top is fixed double-end polishing subassembly bottom. The servo motor is used as a horizontal motion power source, has the characteristics of high speed and high precision, and ensures the accuracy of motion and the high-speed performance of the whole machine. The ball screw can convert the rotary motion of the servo motor into linear motion, so that the adjustment precision of the motion is improved; the first linear guide rail and the first sliding block are matched, so that the nut seat can be prevented from rotating, and the horizontal movement of the nut seat is ensured. The second linear guide rail and the second sliding block can limit the double-head polishing component above to only do horizontal reciprocating motion and act as a bearing double-head polishing component, so that the horizontal motion has high-speed and high-precision characteristics, and the stability and accuracy of the motion and the high-speed performance of the whole machine are guaranteed. The ball screw and the servo motor are matched, the movable plate can reciprocate in the horizontal direction, and the whole polishing system is guaranteed to run stably at a high speed.

The double-head polishing assembly comprises a movable plate and a double-head motor; the double-end motor is installed on the movable plate, the polishing wheel is installed on the rotating shaft of the double-end motor, and the movable plate is installed on the second sliding block. The servo motor is arranged on the second sliding block through the movable plate, and can conveniently perform reciprocating motion during polishing.

A dust baffle plate and an air organ type dust cover are also arranged; the two dust baffles are respectively arranged on the mounting plates on the front side and the rear side of the first linear guide rail; two organ type dust covers are arranged, one end of each organ type dust cover is arranged on the movable plate, and the other end of each organ type dust cover is arranged on the dust blocking plate; and a closed space is formed among the mounting plate, the support wall, the dust blocking plate, the organ type dust cover and the movable plate. The cooperation of dust guard and organ formula dust cover can prevent the dust entering, protects ball screw and slider, can operate steadily, at a high speed in the environment of severe polishing in order to protect the horizontal movement subassembly to increase the life of horizontal movement subassembly, reduce maintenance frequency and maintenance cost.

The pressure sensing device comprises a pressure sensor, a floating joint and a pressure output block; the pressure sensor is arranged on the side wall of the nut seat, the pressure output block is arranged on the lower side of the movable plate, and an inductive contact of the pressure sensor is connected with the pressure output block through the floating joint. The pressure output block is fixed on the movable plate, the pressure change of the movable plate is detected when the movable plate moves, and the pressure borne by the double-head polishing assembly on the movable plate is transmitted to the pressure sensing device; the floating joint can be fine when the movable plate receives sudden impact, protect pressure sensor's response contact to receive horizontal tangential force to damage pressure sensor in preventing the pressure sensor use, prevent that emergency pressure from surpassing the range and damaging pressure sensor.

The pressure sensing device also comprises a travel switch, and the travel switch is in communication connection with the servo motor; the travel switches are arranged on the supporting wall and located beside the second linear guide rail, two travel switches are arranged and located on the same side of the same second linear guide rail and located at two ends of the supporting wall, a baffle is arranged on the lower side of the end portion of the movable plate located on one side of the travel switches and located between the two travel switches, the baffle slides along with the movable plate to touch the travel switches, the travel switches are touched to be in an open state, the servo motor rotates in the reverse direction, the movable plate moves in the reverse direction, the baffle leaves the travel switches, and the travel switches reset to be in a closed state. Two travel switches's setting for restrict the fly leaf and exceed the range motion, avoid in the motion process because the huge impact force that inertia leads to damages servo motor. The setting of baffle can trigger the opening or closing of travel switch.

The second sliding blocks are provided with four blocks, and every two second sliding blocks are arranged on the same second linear guide rail. The second slider is equipped with four, mainly plays the effect of support and direction to can stably provide the supporting role for the fly leaf, make things convenient for the reciprocating motion at the in-process of polishing.

The inboard panel beating that prevents dust is installed in the buttress wall upper portion outside, the dustproof panel beating in the outside is installed in the fly leaf outside, the dustproof panel beating lower extreme in the outside turns over inwards and turns over a formation first horizontal segment, and first horizontal segment inboard bending type up forms first vertical section, and first vertical section is pressed close to the buttress wall outside, the dustproof panel beating outer wall in first vertical section, first horizontal segment, the outside forms U type draw-in groove, the baffle mounting is in the downside of the dustproof panel beating horizontal segment in the outside. The dustproof panel beating in inboard, the dustproof panel beating in outside set up, can help preventing that the dust from getting into.

The inner dustproof metal plate comprises a second horizontal section, a second vertical section and a third vertical section, the second vertical section is installed on the outer side of the support wall, the lower side of the inner end of the second horizontal section is fixed on the upper side face of the second vertical section, and the lower side of the third vertical section is fixed on the upper side face of the outer end of the second horizontal section; the outer end of the second sliding block is positioned above the second horizontal section; the sponge is installed to the U type draw-in groove department of the dustproof panel beating in the outside, and the inboard of sponge is pasted tightly the third vertical section outside of the dustproof panel beating of inboard.

The outer part of the organ type dust cover is of a hook structure, the hook structure is buckled on the inner side dust-proof metal plate, and the lower end of the hook structure is close to the outer side of the supporting wall.

Compared with the prior art, the utility model has the advantages that: the device is used for being matched with a robot to realize automatic grinding, and the conditions of unsuccessful grinding, equipment damage and uneven grinding quality caused by uneven roundness of a pot and the accumulation of debugging errors of debugging personnel are avoided; the material consumption is saved to the maximum extent, and meanwhile, the double-head polishing assembly is designed to reduce the equipment cost and improve the efficiency; this device provides invariable pressure of polishing for the polishing, can carry out real-time compensation according to the change of outside orbit, guarantees that whole polishing in-process is polished the constancy of force. The device can realize automatic polishing of irregular-shaped pots, the processed pots are clear and uniform in surface texture and high in consistency, and the grinding quality is improved.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is a side view of an embodiment of the present invention;

FIG. 4 is a top view of an embodiment of the present invention;

FIG. 5 is a bottom view of an embodiment of the present invention;

FIG. 6 is a schematic view of the dual head motor and polishing wheel of the present invention with the dual head motor and polishing wheel removed;

FIG. 7 is a schematic view of a dual head polishing assembly according to an embodiment of the present invention with the dual head polishing assembly removed;

FIG. 8 is a schematic view of the bellows style dust cap of FIG. 7 with the bellows style dust cap removed;

FIG. 9 is a right side view of the embodiment of the present invention with the dual head buffing assembly and the piano style dust cap removed;

FIG. 10 is a left side view of the embodiment of the present invention with the dual head polishing assembly and the piano type dust cap removed;

FIG. 11 is a top view of the dual head buffing assembly and the piano dust cap of an embodiment of the present invention removed;

FIG. 12 is a perspective view of the embodiment of the present invention with the dual head buffing assembly and the piano style dust cap removed;

FIG. 13 is a perspective view of the embodiment of the present invention with the dual head buffing assembly and the piano style dust cap removed from the side;

FIG. 14 is a schematic view of the structure of FIG. 13 with the front dust shield removed;

FIG. 15 is a side view of FIG. 14 with one side support wall, the second linear guide and the second slider removed;

FIG. 16 is a perspective view of the slide block of FIG. 14 with one side support wall, the second linear guide rail and the second slider removed;

fig. 17 is a top view of fig. 14 with one side of the support wall, the second linear guide, and the second slider removed.

The reference numerals in the drawings mean: 101. mounting a plate; 102. a servo motor; 103. a coupling; 104. a ball screw; 105. a first linear guide rail; 106. a second linear guide; 107. a screw rod supporting seat; 108. a nut seat; 109. a first slider; 110. a support wall; 111. a second slider; 112. a dust guard; 113. an organ type dust cover; 114. an inner dustproof metal plate; 115. an outer dustproof metal plate; 116. a sponge; 117. a baffle plate; 201. a movable plate; 202. a double-headed motor; 203. a polishing wheel; 301. a pressure sensor; 302. a floating joint; 303. a pressure output block; 304. a travel switch.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Examples

Referring to fig. 1 to 17, a constant force control polishing table is used in cooperation with a robot, and includes a horizontal movement assembly, a dual-head polishing assembly, and a pressure sensing device for detecting a pressure of the dual-head polishing assembly; the double-head polishing component is arranged on the horizontal moving component and is controlled by the horizontal moving component to slide along the horizontal moving component, and two ends of the double-head polishing component are respectively provided with a polishing wheel 203; the pressure sensing device is installed on the horizontal movement assembly and is in signal connection with a control panel of the robot, and the pressure sensing device detects the grinding pressure of the double-head polishing assembly in real time and feeds the grinding pressure back to the horizontal movement assembly to compensate the front position and the rear position of the double-head polishing assembly.

The horizontal motion subassembly can drive double-end polishing subassembly and remove at the horizontal direction, and pressure sensing device can feed back pressure of polishing in real time, and this device can accomplish twice process at a machine, comes the pressure of polishing of control polishing in-process through sensitive pressure sensor 301, has saved the use of polishing consumptive material furthest to polish out the uniformity height, of high quality, steady quality's product, can cooperate the robot to realize the automatic polishing of the pan of different regular shapes and polish.

The horizontal motion assembly comprises a mounting plate 101, wherein a servo motor 102, a ball screw 104, a first linear guide rail 105, a second linear guide rail 106 and a screw support seat 107 are respectively mounted on the mounting plate 101; one end of a ball screw 104 is arranged on an output shaft of the servo motor 102 through a coupler 103, the other end of the ball screw is fixed on a screw support seat 107 through a bearing seat, and a nut seat 108 is sleeved on the middle section of the ball screw 104; the first linear guide rail 105 is positioned below the ball screw 104, a first sliding block 109 is arranged on the first linear guide rail 105, and the bottom of the nut seat 108 is fixed on the first sliding block 109; the mounting plates 101 on two sides of the first linear guide rail 105 are respectively provided with a support wall 110, the support walls 110 are respectively provided with a second linear guide rail 106, the second linear guide rail 106 is provided with a second sliding block 111, the bottom of the double-head polishing assembly is arranged on the second sliding block 111, and the top of the nut seat 108 is fixed at the bottom of the double-head polishing assembly. The servo motor 102 is used as a horizontal motion power source, has high-speed and high-precision characteristics, and ensures the accuracy of motion and the high-speed performance of the whole machine. The ball screw 104 can convert the rotary motion of the servo motor 102 into linear motion, so that the adjustment precision of the motion is improved; the cooperation between the first linear guide 105 and the first sliding block 109 prevents the nut holder 108 from rotating and ensures the horizontal movement of the nut holder 108. The second linear guide rail 106 and the second sliding block 111 can limit the upper double-head polishing component to only do horizontal reciprocating motion, and do the function of supporting the double-head polishing component, so that the horizontal motion has the characteristics of high speed and high precision, and the stability and the accuracy of the motion and the high-speed performance of the whole machine are ensured. The ball screw 104 is matched with the servo motor 102, so that the movable plate 201 can reciprocate in the horizontal direction, and the whole polishing system can be ensured to run stably at a high speed.

The double-head polishing assembly comprises a movable plate 201 and a double-head motor 202; the double-head motor 202 is mounted on the movable plate 201, the polishing wheel 203 is mounted on the rotating shaft of the double-head motor 202, and the movable plate 201 is mounted on the second slider 111. The servo motor 102 is mounted on the second slider 111 through the movable plate 201, and can facilitate the reciprocating motion during the grinding.

A dust guard plate 112 and a piano type dust cover 113 are also arranged; two dust baffles 112 are arranged and respectively arranged on the mounting plates 101 at the front side and the rear side of the first linear guide rail 105; two organ type dust covers 113 are arranged, one end of each organ type dust cover 113 is arranged on the movable plate 201, and the other end of each organ type dust cover 113 is arranged on the dust blocking plate 112; the installation plate 101, the support wall 110, the dust guard plate 112, the bellows-type dust cover 113, and the movable plate 201 form a sealed space therebetween. The cooperation of the dust guard 112 and the bellows-type dust guard 113 can prevent dust from entering, protect the ball screw 104 and the slider, and to protect the horizontal motion assembly from being operated stably and at high speed in a severe polishing environment, and to increase the service life of the horizontal motion assembly, and to reduce the maintenance frequency and the maintenance cost. In this embodiment, the organ type dust cover 113 is a product purchased in the market, and the organ type dust cover 113 may be a product purchased in Cangzhou Cang machine tool accessory manufacturing company, an organ type dust cover of Feiyun machinery, or a retractable organ type dust cover of Cangzhou Jinpeng machinery component manufacturing company. The bellows-type dust cover 113 of the present embodiment has a telescopic function, and can ensure that the horizontal movement assembly is still sealed when the movable plate 201 moves.

The pressure sensing device comprises a pressure sensor 301, a floating joint 302 and a pressure output block 303; the pressure sensor 301 is installed on the side wall of the nut seat 108, the pressure output block 303 is installed on the lower side of the movable plate 201, and the sensing contact of the pressure sensor 301 is connected with the pressure output block 303 through the floating joint 302. The pressure output block 303 is fixed to the movable plate 201, and detects the pressure change of the movable plate 201 when the movable plate 201 moves, and the pressure applied to the double-head polishing assembly on the movable plate 201 is transmitted to the pressure sensing device; the floating joint 302 can well protect the sensing contact of the pressure sensor 301 when the movable plate 201 is suddenly impacted, prevent the pressure sensor 301 from being damaged by a transverse tangential force in the using process of the pressure sensor 301, and prevent the pressure sensor 301 from being damaged by sudden pressure exceeding the measuring range.

The pressure sensing device further comprises a travel switch 304, and the travel switch 304 is in communication connection with the servo motor 102; the two travel switches 304 are mounted on the support wall 110 and located beside the second linear guide rail 106, the two travel switches 304 are located on the same side of the same second linear guide rail 106 and located at two ends of the support wall 110, the baffle 117 is located at the lower side of the end portion of the movable plate 201 located at one side of the travel switches 304, the baffle 117 is located between the two travel switches 304, the baffle 117 slides along with the movable plate 201 and touches the travel switches 304, the travel switches 304 are triggered to be in an open state, the servo motor 102 rotates in the reverse direction, the movable plate 201 moves in the reverse direction, the baffle 117 leaves the travel switches 304, and the travel switches 304 are reset to be in a closed state. Two travel switches 304 are provided for limiting the movement of the movable plate 201 beyond the range, so as to avoid the servo motor 102 from being damaged by a large impact force caused by inertia during the movement process. The setting of the shutter 117 can trigger the opening or closing of the travel switch 304.

The number of the second sliding blocks 111 is four, and every two second sliding blocks 111 are installed on the same second linear guide rail 106. The second slider 111 is provided with four blocks, which mainly play a role in supporting and guiding, and can stably provide a supporting role for the movable plate 201, thereby facilitating the reciprocating motion in the grinding process.

The inboard dustproof panel beating 114 is installed in the support wall 110 upper portion outside, the dustproof panel beating 115 in the outside is installed in the fly leaf 201 outside, the dustproof panel beating 115 lower extreme in the outside turns over inwards and turns over a formation first horizontal segment, the inboard bending type up of first horizontal segment forms first vertical section, the support wall 110 outside is pressed close to first vertical section, first horizontal segment, the dustproof panel beating 115 outer wall in the outside form U type draw-in groove, baffle 117 installs the downside at the dustproof panel beating 115 horizontal segment in the outside. The arrangement of the inner dustproof metal plate 114 and the outer dustproof metal plate 115 can help to prevent dust from entering.

The inner dustproof metal plate 114 comprises a second horizontal section, a second vertical section and a third vertical section, the second vertical section is installed outside the support wall 110, the lower side of the inner end of the second horizontal section is fixed on the upper side of the second vertical section, and the lower side of the third vertical section is fixed on the upper side of the outer end of the second horizontal section; the outer end of the second sliding block 111 is positioned above the second horizontal section; sponge 116 is installed at the U-shaped clamping groove of the outer dustproof sheet metal 115, and the inner side of the sponge 116 is attached to the outer side of the third vertical section of the inner dustproof sheet metal 114.

The exterior of the organ type dust cover 113 is formed into a hook structure, the hook structure is fastened on the inner side dust-proof plate, and the lower end of the hook structure is close to the outer side of the supporting wall 110.

In this embodiment, can polish the surface of the inhomogeneous pan of circularity, the robot carries the pan of high-speed rotation to appointed point of polishing, the robot signal is for the constant force control platform of polishing, the platform of polishing receives the signal to forward loading, after the platform of polishing contacts with the pan of high-speed rotation, pressure sensing device detects the current pressure, when the pressure value reaches the pressure of polishing of settlement, signal and give the robot, the robot can remove according to the orbit of polishing, pressure sensing device can real-time detection pressure of polishing and feed back servo motor 102 and carry out position compensation around. Pressure sensor 301 is the "skin" of the entire constant force controlled polishing table which collects pressure information during polishing via the two end contacts.

The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a constant force control platform of polishing, uses with robot collocation which characterized in that: the double-head polishing device comprises a horizontal moving assembly, a double-head polishing assembly and a pressure sensing device for detecting the pressure of the double-head polishing assembly; the double-head polishing assembly is arranged on the horizontal moving assembly and is controlled by the horizontal moving assembly to slide along the horizontal moving assembly, and two ends of the double-head polishing assembly are respectively provided with a polishing wheel; pressure sensing device installs on the horizontal motion subassembly, pressure sensing device and the control panel of robot pass through signal connection, pressure sensing device real-time detection double-end polishing subassembly's the pressure of polishing and feedback to the horizontal motion subassembly is right the double-end polishing subassembly carries out the compensation of front and back position.

2. The constant force control sanding table of claim 1, wherein: the horizontal movement assembly comprises an installation plate, and a servo motor, a ball screw, a first linear guide rail, a second linear guide rail and a screw rod support seat are respectively installed on the installation plate; one end of the ball screw is mounted on an output shaft of the servo motor through a coupler, the other end of the ball screw is fixed on the screw support seat through a bearing seat, and a nut seat is sleeved on the middle section of the ball screw; the first linear guide rail is positioned below the ball screw, a first sliding block is arranged on the first linear guide rail, and the bottom of the nut seat is fixed on the first sliding block; install the knee wall on the mounting panel respectively of first linear guide both sides, install respectively on the knee wall second linear guide, install the second slider on the second linear guide, double-end polishing subassembly bottom is installed on the second slider, nut seat top is fixed double-end polishing subassembly bottom.

3. The constant force control sanding table of claim 2, wherein: the double-head polishing assembly comprises a movable plate and a double-head motor; the double-end motor is installed on the movable plate, the polishing wheel is installed on the rotating shaft of the double-end motor, and the movable plate is installed on the second sliding block.

4. The constant force control sanding table of claim 3, wherein: a dust baffle plate and an air organ type dust cover are also arranged; the two dust baffles are respectively arranged on the mounting plates on the front side and the rear side of the first linear guide rail; two organ type dust covers are arranged, one end of each organ type dust cover is arranged on the movable plate, and the other end of each organ type dust cover is arranged on the dust blocking plate; the mounting plate, the supporting wall, the dust blocking plate, the organ type dust cover and the movable plate form a closed space.

5. The constant force control sanding table of claim 4, wherein: the pressure sensing device comprises a pressure sensor, a floating joint and a pressure output block; the pressure sensor is installed on the side wall of the nut seat, the pressure output block is installed on the lower side of the movable plate, and the sensing contact of the pressure sensor is connected with the pressure output block through the floating joint.

6. The constant force control sanding table of claim 5, wherein: the pressure sensing device also comprises a travel switch, and the travel switch is in communication connection with the servo motor; the travel switches are arranged on the supporting wall and located beside the second linear guide rail, two travel switches are arranged and located on the same side of the same second linear guide rail and located at two ends of the supporting wall, a baffle is arranged on the lower side of the end portion of the movable plate located on one side of the travel switches and located between the two travel switches, the baffle slides along with the movable plate to touch the travel switches, the travel switches are touched to be in an open state, the servo motor rotates in the reverse direction, the movable plate moves in the reverse direction, the baffle leaves the travel switches, and the travel switches reset to be in a closed state.

7. The constant force control sanding table of claim 2, wherein: the second sliding blocks are provided with four blocks, and every two second sliding blocks are arranged on the same second linear guide rail.

8. The constant force control sanding table of claim 6, wherein: the inboard panel beating that prevents dust is installed in the knee wall upper portion outside, the dustproof panel beating in the outside is installed in the fly leaf outside, the dustproof panel beating lower extreme in the outside turns over inwards and turns over a formation first horizontal segment, and first horizontal segment inboard bending type up becomes first vertical segment, and first vertical segment is pressed close to the knee wall outside, the dustproof panel beating outer wall in first vertical segment, first horizontal segment, the outside forms U type draw-in groove, the baffle mounting is in the downside of the dustproof panel beating horizontal segment in the outside.

9. The constant force control sanding table of claim 8, wherein: the inner-side dustproof metal plate comprises a second horizontal section, a second vertical section and a third vertical section, the second vertical section is installed on the outer side of the support wall, the lower side of the inner end of the second horizontal section is fixed on the upper side face of the second vertical section, and the lower side of the third vertical section is fixed on the upper side face of the outer end of the second horizontal section; the outer end of the second sliding block is positioned above the second horizontal section; the sponge is installed to the U type draw-in groove department of the dustproof panel beating in the outside, and the inboard of sponge is pasted tightly the third vertical section outside of the dustproof panel beating of inboard.

10. The constant force control sanding table of claim 8, wherein: the outer part of the organ type dust cover is of a hook structure, the hook structure is buckled on the inner side dust-proof metal plate, and the lower end of the hook structure is close to the outer side of the supporting wall.