CN211490935U

CN211490935U - Double-sided grinding and polishing machine

Info

Publication number: CN211490935U
Application number: CN201922193229.2U
Authority: CN
Inventors: 杨雪峰; 李明; 许丽
Original assignee: Kunshan Xinlesheng Metal Industry Co ltd
Current assignee: Kunshan Xinlesheng Metal Industry Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-15
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to the technical field of accessories of polishing equipment, in particular to a double-sided grinding and polishing machine, which can simultaneously carry out grinding and polishing operation on two sides of a metal workpiece, thereby improving the grinding and polishing efficiency, and simultaneously reducing the times of disassembling and assembling the metal workpiece on a positioning mechanism, thereby improving the convenience of grinding and polishing the metal workpiece; the polishing machine comprises a workbench, a supporting plate, a motor, a main polishing wheel and a positioning mechanism, wherein the bottom end of the supporting plate is connected with the left side of the top end of the workbench; the polishing machine also comprises a power wheel, a first belt, two groups of transmission wheels, a power shaft, a supporting plate, a second belt, a driving wheel, a regulating and controlling rod, a regulating threaded rod, a regulating handle, a rotating block, a telescopic prismatic rod and an auxiliary polishing wheel, wherein the bottom end of the supporting plate is connected with the right side of the top end of the workbench.

Description

Double-sided grinding and polishing machine

Technical Field

The utility model relates to a polishing equipment auxiliary device's technical field especially relates to a double-sided grinding burnishing machine.

Background

As is well known, a grinding and polishing machine is a device for grinding and polishing the outer surface of a workpiece in the production and processing of the metal workpiece, can greatly improve the appearance quality of the metal workpiece, and is widely used in the field of metal workpiece production; the existing grinding and polishing machine comprises a workbench, a supporting plate, a motor, a main polishing wheel and a positioning mechanism, wherein the bottom end of the supporting plate is connected with the left side of the top end of the workbench; when the existing grinding and polishing machine is used, firstly, a metal workpiece to be ground and polished is positioned by a positioning mechanism, so that a grinding surface of the metal workpiece is in contact with a working end of a main polishing wheel and is adjusted to a proper extrusion force, then a motor is started, so that an output end of the motor drives the main polishing wheel to rotate to grind and polish the left end of the metal workpiece, and after the surface of the metal workpiece is polished, other surfaces of the metal workpiece are replaced and polished continuously; the existing grinding and polishing machine is found in use, the grinding and polishing machine can only carry out grinding and polishing operation on one surface of a metal workpiece, so that the grinding and polishing efficiency is reduced, the metal workpiece needs to be dismounted and mounted for many times at a positioning mechanism, the grinding and polishing convenience is reduced, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can carry out the burnishing and polishing operation to metal workpiece's two sides simultaneously, consequently improve the burnishing and polishing efficiency, reduce the dismouting number of times of metal workpiece on positioning mechanism simultaneously, therefore improved the metal workpiece burnishing and polishing convenience to the two-sided burnishing and polishing machine of reinforcing practicality.

The utility model discloses a double-sided grinding and polishing machine, including workstation, backup pad, motor, main polishing wheel and positioning mechanism, the bottom of backup pad is connected with the top left side of workstation, and the motor is installed at the left end top of backup pad, and the left end top of backup pad is run through and is provided with the hole of stretching out, and the output of motor rotates from the left side of backup pad to pass the hole of stretching out and stretch out to the right side of backup pad, and the output of motor and the middle part of main polishing wheel are fixed connection, and positioning mechanism installs in the top middle left side of workstation; the polishing machine further comprises a power wheel, a first belt, two groups of transmission wheels, a power shaft, a supporting plate, a second belt, a driving wheel, a regulating and controlling rod, a regulating threaded rod, a regulating handle, a rotating block, a telescopic prismatic rod and an auxiliary polishing wheel, wherein the bottom end of the supporting plate is connected with the top right side of the workbench, the top area and the middle area of the left end of the supporting plate are respectively provided with a power hole and a regulating and controlling hole in a penetrating way, the right end of the power shaft is connected with a power hole bearing, the two groups of transmission wheels are respectively in key connection with the left area and the right area of the power shaft, the power wheel is in key connection with the middle part of the output end of a motor, the top area and the bottom area of the first belt are respectively in rotary connection with the left transmission wheel and the power wheel, the regulating and controlling hole are sleeved with the left bearing of the middle area of the regulating and controlling rod, the driving wheel is in key connection with the left area of the regulating and controlling rod, the top area and the, the adjustable threaded rod is characterized in that a control cavity is arranged inside the adjusting rod, the right end of the control cavity is communicated with an adjusting threaded hole, the right side of the left end self-adjusting rod of the adjusting threaded rod penetrates through the insertion hole and extends into the control cavity, the right end of the adjusting threaded rod is connected with the left end of the adjusting handle, the inner side wall of the control cavity is uniformly provided with a plurality of ridges, the left end of the control cavity is communicated with an extension hole, the left side of the right end self-adjusting rod of the extension ridge rod penetrates through the extension hole and is inserted into the control cavity in a sliding manner, a rotating cavity is arranged inside the right area of the extension ridge rod, the right end of the rotating cavity is communicated with the control cavity and is provided with a rotating hole, the left end of the adjusting threaded rod penetrates through the rotating hole from the control cavity and extends into the rotating cavity, the rotating block is rotationally clamped with the rotating cavity, and the left end of, the left end of the telescopic prismatic rod is connected with the middle part of the right end of the auxiliary polishing wheel.

The utility model discloses a double-sided grinding burnishing machine still includes extrusion stem, slurcam, locating plate, spacing spring and two sets of locating levers, the bottom of two sets of locating levers all is connected with the top right side of regulation and control pole, the top of two sets of locating levers is connected with the bottom left side and the right side of locating plate respectively, the top of the patchhole of control chamber is run through and is provided with the extrusion hole, extrusion hole and extrusion stem slip suit, the top of extrusion stem is connected with the bottom of slurcam, the bottom and the top of spacing spring are hugged closely with the top of slurcam and the bottom of locating plate respectively, the bottom of extrusion stem is provided with coupling assembling, coupling assembling's bottom is hugged closely with adjusting threaded rod's top.

The utility model discloses a double-sided grinding burnishing machine still includes the anchor strut, the bottom of anchor strut is connected with the top of backup pad, the left end of power shaft is connected with the right-hand member bearing of anchor strut.

The utility model discloses a double-sided grinding burnishing machine, coupling assembling includes the non slipping spur, the top of non slipping spur is hugged closely with the bottom of extrusion stem, the bottom of non slipping spur is hugged closely with adjusting threaded rod's top.

The utility model discloses a double-sided grinding burnishing machine still includes the fender rod, spacing spring and fender rod suit, the top of fender rod is connected with the bottom of locating plate.

The utility model discloses a double-sided grinding burnishing machine still includes anti-skidding handle cover, anti-skidding handle cover and the fixed suit of regulation handle.

The utility model discloses a double-sided grinding burnishing machine still includes the rubber ring, the rubber ring is with the regional fixed suit in right part of regulation and control pole.

The utility model discloses a double-sided grinding burnishing machine still includes two sets of collecting plates, the inner of two sets of collecting plates is connected with positioning mechanism's the regional left end in bottom and right-hand member respectively.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, a metal workpiece to be ground and polished is placed at a fixed position of a positioning mechanism, then an adjusting handle is rotated to enable an adjusting threaded rod to rotate in an adjusting threaded hole of an adjusting and controlling rod, then the adjusting threaded rod pushes a telescopic prismatic rod to move out of the adjusting and controlling rod through a rotating block and move, meanwhile, the telescopic prismatic rod drives an auxiliary polishing wheel to move leftwards to be close to the right end of the metal workpiece, the adjusting threaded rod is continuously rotated until the auxiliary polishing wheel clamps the metal workpiece at the right end of a main polishing wheel, the metal workpiece is positioned and fastened through the positioning mechanism after the position of the metal workpiece is finely adjusted, then a motor is started to enable the motor to drive the main polishing wheel to rotate, meanwhile, the motor drives a left transmission wheel to rotate through a power wheel through a first belt, then a left driving wheel drives a right transmission wheel to synchronously rotate through a power shaft, then a right power wheel drives a driving wheel to rotate through a second belt, the flexible arris pole then drives vice throwing aureola and main throwing aureola synchronous rotation and polishes two sides about the metal work piece simultaneously to can grind the polishing operation through the two sides to the metal work piece simultaneously, consequently improve grinding and polishing efficiency, reduce the dismouting number of times of metal work piece on positioning mechanism simultaneously, therefore improved the metal work piece and ground the polishing convenience, thereby reinforcing practicality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of a partially enlarged structure of a;

FIG. 3 is a schematic view of the connection structure of the telescopic rod and the control rod of the present invention;

FIG. 4 is a schematic view of the connection structure of the positioning plate and two sets of positioning rods of the present invention;

FIG. 5 is a schematic view of the connection structure of the positioning mechanism and the collecting plate of the present invention;

in the drawings, the reference numbers: 1. a work table; 2. a support plate; 3. a motor; 4. a primary polishing wheel; 5. A positioning mechanism; 6. a power wheel; 7. a first belt; 8. two groups of transmission wheels; 9. a power shaft; 10. a support plate; 11. a second belt; 12. driving the wheel; 13. a regulating and controlling rod; 14. adjusting the threaded rod; 15. adjusting the handle; 16. rotating the block; 17. a telescopic prismatic rod; 18. a secondary polishing wheel; 19. an extrusion stem; 20. a push plate; 21. positioning a plate; 22. a limiting spring; 23. two groups of positioning rods; 24. a reinforcing rod; 25. anti-skid blocks; 26. a guard bar; 27. an anti-slip handle sleeve; 28. A rubber ring; 29. two sets of collecting plates; 30. a control chamber.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 5, the utility model discloses a double-sided grinding and polishing machine, including workstation 1, backup pad 2, motor 3, main polishing wheel 4 and positioning mechanism 5, the bottom of backup pad 2 is connected with the top left side of workstation 1, motor 3 installs at the left end top of backup pad 2, the left end top of backup pad 2 runs through and is provided with and stretches out the hole, the output of motor 3 rotates from the left side of backup pad 2 and passes the hole and stretch out to the right side of backup pad 2, the middle part fixed connection of the output of motor 3 and main polishing wheel 4, positioning mechanism 5 installs on the top middle part left side of workstation 1; the polishing machine also comprises a power wheel 6, a first belt 7, two groups of transmission wheels 8, a power shaft 9, a supporting plate 10, a second belt 11, a driving wheel 12, a regulating and controlling rod 13, a regulating threaded rod 14, a regulating handle 15, a rotating block 16, a telescopic prismatic rod 17 and an auxiliary polishing wheel 18, wherein the bottom end of the supporting plate 10 is connected with the right side of the top end of the workbench 1, a power hole and a regulating and controlling hole are respectively arranged in the top area and the middle area of the left end of the supporting plate 10 in a penetrating manner, the right end of the power shaft 9 is connected with a power hole bearing, the two groups of transmission wheels 8 are respectively in key connection with the left area and the right area of the power shaft 9, the power wheel 6 is in key connection with the middle part of the output end of the motor 3, the top area and the bottom area of the first belt 7 are respectively in rotary connection with the left transmission wheel and the power wheel 6, the regulating and controlling hole are sleeved with the left bearing in the middle, the top area and the bottom area of the second belt 11 are respectively rotatably connected with the right transmission wheel and the driving wheel 12, a control cavity 30 is arranged inside the adjusting rod 13, the right end of the control cavity 30 is communicated with an adjusting threaded hole, the right end of the adjusting threaded rod 14 is screwed into the inserting hole from the right side of the adjusting rod 13 and extends into the control cavity 30, the right end of the adjusting threaded rod 14 is connected with the left end of the adjusting handle 15, the inner side wall of the control cavity 30 is uniformly provided with a plurality of ribs, the left end of the control cavity 30 is communicated with an extending port, the right end of the extending rib 17 passes through the extending port from the left side of the adjusting rod 13 and is slidably inserted into the control cavity 30, a rotating cavity is arranged inside the right area of the extending rib 17, the right end of the rotating cavity is communicated with the control cavity 30 and is provided with a rotating hole, the left end of the adjusting threaded rod 14 passes through the rotating hole from the rotating cavity 30 and, the rotating block 16 is rotationally clamped with the rotating cavity, the left end of the adjusting threaded rod 14 is connected with the right end of the rotating block 16, and the left end of the telescopic prismatic rod 17 is connected with the middle part of the right end of the auxiliary polishing wheel 18; firstly, a metal workpiece to be ground and polished is placed at a fixed position of a positioning mechanism, then an adjusting handle is rotated to enable an adjusting threaded rod to rotate in an adjusting threaded hole of an adjusting and controlling rod, then the adjusting threaded rod pushes a telescopic prismatic rod to move out of the adjusting and controlling rod through a rotating block and move, meanwhile, the telescopic prismatic rod drives an auxiliary polishing wheel to move leftwards to be close to the right end of the metal workpiece, the adjusting threaded rod is continuously rotated until the auxiliary polishing wheel clamps the metal workpiece at the right end of a main polishing wheel, the metal workpiece is positioned and fastened through the positioning mechanism after the position of the metal workpiece is finely adjusted, then a motor is started to enable the motor to drive the main polishing wheel to rotate, meanwhile, the motor drives a left transmission wheel to rotate through a power wheel through a first belt, then a left driving wheel drives a right transmission wheel to synchronously rotate through a power shaft, then a right power wheel drives a driving wheel to rotate through a second belt, the flexible arris pole then drives vice throwing aureola and main throwing aureola synchronous rotation and polishes two sides about the metal work piece simultaneously to can grind the polishing operation through the two sides to the metal work piece simultaneously, consequently improve grinding and polishing efficiency, reduce the dismouting number of times of metal work piece on positioning mechanism simultaneously, therefore improved the metal work piece and ground the polishing convenience, thereby reinforcing practicality.

The utility model discloses a double-sided grinding and polishing machine, still include extrusion stem 19, push plate 20, locating plate 21, spacing spring 22 and two sets of locating lever 23, the bottom of two sets of locating lever 23 all is connected with the top right side of regulation and control pole 13, the top of two sets of locating lever 23 is connected with the bottom left side and the right side of locating plate 21 respectively, the top of the patchhole of control chamber 30 runs through and is provided with the extrusion hole, the extrusion hole is in slip fit with extrusion stem 19, the top of extrusion stem 19 is connected with the bottom of push plate 20, the bottom and the top of spacing spring 22 are hugged closely with the top of push plate 20 and the bottom of locating plate 21 respectively, the bottom of extrusion stem 19 is provided with coupling assembling, the bottom of coupling assembling is hugged closely with the; after the adjusting threaded rod is adjusted and is accomplished, at this moment, limiting spring then promotes the stripper bar through the slurcam under the support of locating plate for the coupling assembling of stripper bar is hugged closely and is spacing for adjusting threaded rod on adjusting threaded rod's top, has reduced adjusting threaded rod and has taken place pivoted probability by oneself, has reduced the probability that the in-process of vice throwing aureola polishing breaks away from with the metal work surface promptly, thereby has strengthened the practicality.

The utility model discloses a double-sided grinding and polishing machine, which also comprises a reinforcing rod 24, the bottom end of the reinforcing rod 24 is connected with the top end of the supporting plate 2, and the left end of the power shaft 9 is connected with the right end bearing of the reinforcing rod 24; make power shaft pivoted more stable through the anchor strut to the steadiness has been strengthened.

The utility model discloses a double-sided grinding and polishing machine, the connecting component comprises an anti-skid block 25, the top end of the anti-skid block 25 is clung to the bottom end of an extrusion rod 19, and the bottom end of the anti-skid block is clung to the top end of an adjusting threaded rod 14; the friction coefficient of the bottom end of the adjusting threaded rod is increased through the anti-slip blocks, so that the friction force between the adjusting threaded rod and the extrusion rod is increased, the probability of relative sliding between the adjusting threaded rod and the extrusion rod is reduced, and the stability is enhanced.

The utility model discloses a double-sided grinding and polishing machine, which also comprises a protective rod 26, a limit spring 22 is sleeved with the protective rod 26, and the top end of the protective rod 26 is connected with the bottom end of a positioning plate 21; carry on spacingly to spacing spring through the protective rod, reduced the probability of spacing spring slippage between locating plate and catch plate to the practicality has been strengthened.

The double-sided grinding and polishing machine of the utility model also comprises an anti-skid handle sleeve 27, the anti-skid handle sleeve 27 is fixedly sleeved with the adjusting handle 15; the friction coefficient of the outer side wall of the adjusting handle is increased through the anti-skidding handle sleeve, the probability that the hand slips on the adjusting handle when the adjusting handle is rotated is reduced, and therefore the practicability is enhanced.

The double-sided grinding and polishing machine of the utility model also comprises a rubber ring 28, the rubber ring 28 is fixedly sleeved with the right area of the regulating and controlling rod 13; the adjusting rod is required to be controlled not to rotate when the adjusting threaded rod is rotated, and the adjusting rod is held through the rubber ring at the moment, so that the adjusting rod is controlled more reliably, and the practicability is enhanced.

The double-sided grinding and polishing machine of the utility model also comprises two groups of collecting plates 29, the inner ends of the two groups of collecting plates 29 are respectively connected with the left end and the right end of the bottom area of the positioning mechanism 5; the chips polished by the two groups of collecting plates are collected, so that the amount of the chips falling to the top and the outer side of the workbench is reduced, the chips are cleaned more conveniently, and the practicability is enhanced.

The utility model discloses a double-sided grinding and polishing machine, when it works, firstly, the metal workpiece to be ground and polished is placed at the fixed position of a positioning mechanism, then an adjusting handle is rotated to enable an adjusting threaded rod to rotate in an adjusting threaded hole of an adjusting rod, then the adjusting threaded rod pushes a telescopic prismatic rod to move out of the adjusting rod through a rotating block, the telescopic prismatic rod drives an auxiliary polishing wheel to move leftwards to be close to the right end of the metal workpiece, the adjusting threaded rod is continuously rotated until the auxiliary polishing wheel clamps the metal workpiece at the right end of a main polishing wheel, the metal workpiece is positioned and fastened through the positioning mechanism after the position of the metal workpiece is finely adjusted, then a motor is started to enable the motor to drive the main polishing wheel to rotate, meanwhile, the motor drives a left side transmission wheel to rotate through a first belt through a power wheel, then a left side transmission wheel drives a right side transmission wheel to synchronously rotate through a power shaft, then a right side power, at the moment, the driving wheel drives the telescopic prismatic rod to rotate through the adjusting and controlling rod, and meanwhile, the telescopic prismatic rod drives the auxiliary polishing wheel and the main polishing wheel to synchronously rotate to polish the left surface and the right surface of the metal workpiece, so that the process of polishing the two ends of the metal workpiece simultaneously is realized.

The terms "front", "rear", "left", "right" and the like as used herein are for illustrative purposes only.

In the present invention, "first", "second" and "third" do not represent specific quantities or sequences, but are merely used for distinguishing names.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A double-sided grinding and polishing machine comprises a workbench (1), a support plate (2), a motor (3), a main polishing wheel (4) and a positioning mechanism (5), wherein the bottom end of the support plate (2) is connected with the left side of the top end of the workbench (1), the motor (3) is installed at the top of the left end of the support plate (2), an extending hole is formed in the top of the left end of the support plate (2) in a penetrating mode, the output end of the motor (3) rotates from the left side of the support plate (2), penetrates through the extending hole and extends to the right side of the support plate (2), the output end of the motor (3) is fixedly connected with the middle of the main polishing wheel (4), and the positioning mechanism (5) is installed on the left side of the middle; the polishing machine is characterized by further comprising a power wheel (6), a first belt (7), two groups of transmission wheels (8), a power shaft (9), a supporting plate (10), a second belt (11), a driving wheel (12), a regulating and controlling rod (13), a regulating threaded rod (14), a regulating handle (15), a rotating block (16), a telescopic prismatic rod (17) and an auxiliary polishing wheel (18), wherein the bottom end of the supporting plate (10) is connected with the right side of the top end of the workbench (1), a power hole and a regulating and controlling hole are respectively arranged in the top area and the middle area of the left end of the supporting plate (10) in a penetrating mode, the right end of the power shaft (9) is connected with a power hole bearing, the two groups of transmission wheels (8) are respectively in key connection with the left area and the right area of the power shaft (9), the power wheel (6) is in key connection with the middle of the output end of the motor (3), the top area and the bottom area of the first belt (7) are respectively in rotary connection with the left transmission wheel and the power wheel (6), the adjustable belt conveyor is characterized in that the adjusting and controlling hole is sleeved with a bearing at the left side of the middle area of the adjusting and controlling rod (13), the driving wheel (12) is connected with the left area of the adjusting and controlling rod (13) in a key mode, the top area and the bottom area of the second belt (11) are respectively connected with the right transmission wheel and the driving wheel (12) in a rotating mode, a control cavity (30) is arranged inside the adjusting and controlling rod (13), an adjusting threaded hole is formed in the right end of the control cavity (30) in a communicated mode, a right side screw of the left end self-adjusting rod (13) of the adjusting threaded rod (14) penetrates through an insertion hole and stretches into the control cavity (30), the right end of the adjusting threaded rod (14) is connected with the left end of the adjusting handle (15), a plurality of ribs are uniformly arranged on the inner side wall of the control cavity (30), a telescopic hole is formed in the left end of the left end self-adjusting rod (13) of the telescopic rod (17) penetrates through the telescopic hole and is inserted into the, the regional inside rotation chamber that is provided with in right part of flexible arris pole (17), the right-hand member and the control chamber (30) intercommunication in rotation chamber are provided with rotates the hole, pass the rotation hole and stretch into to rotating the intracavity in the left end of adjusting threaded rod (14) from control chamber (30), turning block (16) rotate with the rotation chamber and clamp, the left end of adjusting threaded rod (14) is connected with the right-hand member of turning block (16), the left end of flexible arris pole (17) is connected with the right-hand member middle part of vice throwing aureola (18).

2. A double-sided grinding and polishing machine as defined in claim 1, further comprising a pressing rod (19), a pushing plate (20), a positioning plate (21), a limit spring (22) and two sets of positioning rods (23), the bottom ends of the two groups of positioning rods (23) are connected with the right side of the top end of the regulating and controlling rod (13), the top ends of the two groups of positioning rods (23) are respectively connected with the left side and the right side of the bottom end of the positioning plate (21), the top end of the insertion hole of the control cavity (30) is provided with an extrusion hole in a penetrating way, the extrusion hole is sleeved with the extrusion rod (19) in a sliding way, the top end of the extrusion rod (19) is connected with the bottom end of the pushing plate (20), the bottom end and the top end of the limiting spring (22) are respectively clung to the top end of the pushing plate (20) and the bottom end of the positioning plate (21), the bottom of extrusion pole (19) is provided with coupling assembling, coupling assembling's bottom is hugged closely with the top of adjusting threaded rod (14).

3. A double-sided grinding and polishing machine as claimed in claim 2, further comprising a reinforcing rod (24), wherein the bottom end of the reinforcing rod (24) is connected with the top end of the support plate (2), and the left end of the power shaft (9) is connected with the right end bearing of the reinforcing rod (24).

4. A double-sided grinding and polishing machine as claimed in claim 3, characterized in that said connecting assembly comprises anti-skid blocks (25), the top ends of said anti-skid blocks (25) abutting against the bottom ends of the squeezing rods (19), and the bottom ends of said anti-skid blocks abutting against the top ends of the adjusting threaded rods (14).

5. The double-sided grinding and polishing machine according to claim 4, further comprising a guard bar (26), wherein the limiting spring (22) is sleeved with the guard bar (26), and the top end of the guard bar (26) is connected with the bottom end of the positioning plate (21).

6. A double-sided grinding and polishing machine as claimed in claim 5, further comprising an anti-slip handle sleeve (27), wherein the anti-slip handle sleeve (27) is fixedly sleeved with the adjusting handle (15).

7. A double-sided grinding and polishing machine as claimed in claim 6, characterized in that it further comprises a rubber ring (28), said rubber ring (28) being fixedly fitted to the right region of the control lever (13).

8. A double-sided grinding and polishing machine as claimed in claim 7, characterized by further comprising two sets of collecting plates (29), the inner ends of the two sets of collecting plates (29) being connected to the left and right ends of the bottom area of the positioning mechanism (5), respectively.