CN114211381B

CN114211381B - Polishing and grinding device for outer circular surface of hydraulic cylinder

Info

Publication number: CN114211381B
Application number: CN202111626137.4A
Authority: CN
Inventors: 孙兆勇; 孙磊; 陈浩; 陈宁
Original assignee: Xuzhou Jinding Hengli Hydraulic Parts Co ltd
Current assignee: Xuzhou Jinding Hengli Hydraulic Parts Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-09-16
Anticipated expiration: 2041-12-28
Also published as: CN114211381A

Abstract

The invention relates to the technical field of polishing equipment, and discloses a polishing and grinding device for the outer circular surface of a hydraulic cylinder, which extends to the inside of an adjusting bin through an adjusting bolt and is contacted with a sliding block, so that the depth of the adjusting bolt inserted into the adjusting bin can be adjusted by rotating the adjusting bolt, the sliding block is pushed to synchronously move in the inserting process of the adjusting bolt, the anti-falling rod is movably sleeved with the sliding block at the moment so as to drive the anti-falling rod to synchronously move, sliding grooves are formed in the top and the bottom of a limiting groove and are matched with a limiting block, so that the position of a sliding rod can be adjusted by rotating the adjusting bolt, the distance between a driving roller and a feeding wheel is adjusted, pipes with different diameters can be polished by the device, compared with the traditional equipment which needs to adjust a polishing machine with larger weight, the device has smaller adjusting difficulty and needs to adjust the equipment one by one, the device is more convenient to use.

Description

Polishing and grinding device for outer circular surface of hydraulic cylinder

Technical Field

The invention relates to the technical field of polishing equipment, in particular to a polishing and grinding device for an outer circular surface of a hydraulic cylinder.

Background

The polishing and grinding device is a machine tool which is very common in industrial production, and mainly used for polishing and grinding the outer surface of a workpiece so as to reduce the roughness of the surface of the workpiece, in particular to parts which are commonly used in a high-pressure environment, such as a hydraulic cylinder, a hydraulic rod and the like, the problem that once the parts are not flat, hydraulic oil leaks under the action of high pressure and the hydraulic cylinder is damaged is solved, so that the outer circle of the hydraulic cylinder needs to be polished and ground in the production process of the hydraulic cylinder, the existing polishing and grinding device mainly comprises a rotating roller, a polishing machine, a feeding wheel and other main structures, the rotating roller drives the hydraulic cylinder to rotate in the operation process, the polishing machine polishes by contacting a highly-rotating polishing disk with the outer circle of the hydraulic cylinder, and the obliquely-arranged feeding wheel drives a cylinder body to feed in the rotation process, the existing polishing and grinding device has the advantages of simple structure, low cost, convenience in use and the like, and is the most widely used polishing and grinding device at present.

Although the prior polishing and grinding device has many advantages, there still exists a certain limitation in the practical use process, for example, because the rotating speed of the rotating roller is fixed, so the rotating speed of the polishing piece is also fixed, so that the rotating speed of the feeding wheel is constant, which results in that the feeding speed of the polishing piece is also constant, but the roughness of the surface of different workpieces is different, the required polishing degree is different, because the feeding speed is constant, the roughness of the polishing piece with higher roughness does not meet the requirement after finishing one-time polishing and needs to be polished again, the polishing member with lower roughness is over polished, so that the tolerance is increased and the polishing member is scrapped, which results in the reduction of production efficiency, in view of the above, the present application provides a polishing and grinding device for the outer circular surface of a hydraulic cylinder, which aims to solve the above-mentioned problems.

Disclosure of Invention

Aiming at the defects of the existing polishing and grinding device for the outer circular surface of the hydraulic cylinder in the background technology in the using process, the invention provides the polishing and grinding device for the outer circular surface of the hydraulic cylinder, which has the advantage of automatically adjusting the feeding speed according to the roughness and solves the problem of the traditional equipment caused by the constant feeding speed.

The invention provides the following technical scheme: a polishing and grinding device for the outer circular surface of a hydraulic cylinder comprises a shell, wherein feed ports are formed in two sides of the shell, rectangular holes are formed in positions, located below the feed ports, of the two sides of the shell, an adjusting device is fixedly installed at one end of each rectangular hole, a power chamber is fixedly installed at a position, located below the feed ports and close to the adjusting device, of the two sides of the shell, a first power machine is fixedly sleeved inside the power chamber, an output shaft of the first power machine penetrates through the shell and extends into the shell, a transmission roller is fixedly installed at one end of the output shaft of the first power machine and located inside the shell, an anti-falling device is movably sleeved inside the adjusting device, a polishing part is placed at the top of the transmission roller, a feed device is fixedly installed at a position, close to the bottom, of one side of an inner cavity of the shell, and is matched with the anti-falling device, the polishing device comprises a feeding device, a polishing piece, a first power machine, a second power machine, a rotating roller, a third power machine, a polishing disc, a guide wheel rod and an anti-falling device, wherein the polishing piece is in contact with the feeding device, the second power machine is fixedly installed at the position, close to the middle, of the top of the feeding device, one end of an output shaft of the second power machine is fixedly provided with the rotating roller, the rotating roller is in contact with the feeding device, the third power machine is fixedly installed at one side of an inner cavity of a shell and above the feeding device, the polishing disc is fixedly installed at one end of an output shaft of the third power machine, the polishing disc is in contact with the polishing piece, the guide wheel rod is fixedly installed at the position, close to the two sides, of the inner cavity of the shell, and the guide wheel rod is in contact with the anti-falling device.

Preferably, adjusting device includes the regulation storehouse, the inside movable mounting of regulation storehouse has the sliding block, the inside movable mounting that rectangular hole and this rectangular hole were seted up to one side of sliding block has the anticreep device, threaded hole and the inside activity of this threaded hole have been seted up to one side of regulation storehouse surface has cup jointed adjusting bolt, adjusting bolt extends to the inside of regulation storehouse and contacts with the sliding block, fixed mounting has reset spring on one side of sliding block and the position that is located the adjusting bolt outside, reset spring's one end and regulation storehouse fixed connection.

Preferably, the anticreep device includes the anticreep pole, the anticreep pole cup joints with the sliding block activity, fixed mounting has arc and guide pulley pole corresponding on the position that anticreep pole one side is close to both ends, the arc is personally submitted with the contact of guide pulley pole to the arc, the top and the bottom fixed mounting of anticreep pole have stopper and stopper linear array's along the line mode to distribute, the stopper is corresponding with feeding device.

Preferably, feeding device is including feeding the seat, the top of feeding the seat has been seted up and has been adjusted the spout and adjust the spout and distribute with linear array's mode, adjust the inside movable mounting of spout and have the slide bar, slide bar one side and be located to adjust fixed mounting on the position of spout inside has spacing spring, the top activity of slide bar has cup jointed and has rotated the seat, it has seted up spacing groove and has cooperateed with the anticreep pole to rotate seat one side, the top and the bottom of spacing groove have seted up spout and this spout and have cooperateed with the stopper, the one end fixed mounting who rotates the seat has the connecting rod, the inside activity of connecting rod has cup jointed the feed wheel, the feed wheel contacts with the live-rollers and the feed wheel contacts with polishing piece simultaneously.

Preferably, the outer surface of the rotating roller is provided with a screw thread.

Preferably, the second power machine drives the rotating roller to rotate at a constant speed, and the friction force between the rotating roller and the feeding wheel is smaller than the friction force between the polishing piece and the feeding wheel in an unpolished state and larger than the friction force between the polished polishing piece and the feeding wheel.

The invention has the following beneficial effects:

1. the adjusting bolt extends into the adjusting bin and is in contact with the sliding block, so that the depth of the adjusting bolt inserted into the adjusting bin can be adjusted when the adjusting bolt is rotated, the adjusting bolt extends into the adjusting bin and is in contact with the sliding block, the sliding block is pushed to move synchronously in the inserting process of the adjusting bolt, the anti-falling rod is movably sleeved with the sliding block to drive the anti-falling rod to move synchronously, sliding grooves are formed in the top and the bottom of the limiting groove and are matched with the limiting block, the position of the sliding rod can be adjusted by rotating the adjusting bolt, the distance between the driving roller and the feeding wheel is adjusted, pipes with different diameters can be polished by the device, compared with the traditional device which needs to adjust a polishing machine with larger weight, the adjusting difficulty of the device is smaller, and the devices need to be adjusted one by one, the device is more convenient to use.

2. The contact surface of the arc-shaped plate and the guide wheel rod is arc-shaped, so that when the rotating seat rotates by taking the central line of the sliding rod as a rotating center, the sliding grooves are formed in the top and the bottom of the limiting groove and are matched with the limiting blocks so as to drive the anti-disengaging device to synchronously move, and the contact surface of the arc-shaped plate and the guide wheel rod is arc-shaped, so that the guide wheel rod can push the arc-shaped plate to enable the anti-disengaging device to integrally move towards one side of the transmission roller in the moving process of the anti-disengaging device, the feeding wheel and the polishing piece can be always kept in a contact state, the phenomenon that the feeding wheel deviates in the deflecting process of the rotating seat so as to be incapable of contacting with the polishing piece any more, so that the feeding device is abnormal in work is avoided, and the stability of the device is improved.

3. The invention makes the feed wheel generate an acting force with a starting point as a contact point between the feed wheel and pointing to the axial direction of the feed wheel by the external surface of the rotating roller through friction force in the rotating process of the rotating roller, makes the rotating seat deflect by taking the central line of the sliding rod as a rotating center under the action of the acting force, makes the feed wheel keep an inclined state, when a polishing piece passes through the feeding port and enters the inner part of the shell and is contacted with the transmission roller, the feed wheel and the polishing disk, the polishing piece synchronously rotates under the action of the rotation of the transmission roller, because the polishing piece is in an unpolished state at the moment, the friction force between the polishing piece and the feed wheel is larger than the friction force between the rotating roller and the feed wheel, the rotating seat starts to be aligned under the action, so that the inclination degree of the feed wheel is reduced, and the feed speed of the polishing piece in the shell is reduced, when the roughness of the outer surface of the polishing piece is reduced along with the polishing, the friction force between the polishing piece and the feeding wheel is smaller than the friction force between the rotating roller and the feeding wheel, so that the rotating seat deflects and the inclination degree of the feeding wheel is increased, the feeding speed of the polishing piece in the shell is increased, the process can be continuously circulated when the unpolished part of the polishing piece is contacted with the feeding wheel, and the polishing of the whole outer surface of the polishing piece is finished, the feeding speed can be determined according to the specific polishing degree of the outer surface of the polishing piece in the polishing mode, and the traditional constant-speed feeding mode has two problems, one is that the operation is complicated because the single polishing cannot meet the requirement due to the fact that the polishing is carried out for multiple times when the roughness of the outer surface of the polishing piece is high, and the problem that the tolerance is too large and the pipe is scrapped when the roughness of the outer surface of the polishing piece is reduced and the polishing degree is too high, the device is good to avoid the point, the practicability of the device is improved, meanwhile, the whole adjusting process of the device can be automatically carried out under the condition of non-manual operation, and the automation of the device is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view of the structure of the present invention;

FIG. 3 is a schematic cross-sectional view taken along the direction A in FIG. 2 according to the present invention;

FIG. 4 is a schematic right-view of the structure of the present invention;

FIG. 5 is a schematic cross-sectional view taken along the direction B in FIG. 4;

FIG. 6 is a schematic cross-sectional view taken along the direction C in FIG. 4 according to the present invention;

FIG. 7 is a schematic cross-sectional view taken along direction D in FIG. 4 according to the present invention;

FIG. 8 is a schematic structural diagram of the main body of the present invention;

FIG. 9 is a schematic view of the anti-separation device of the present invention;

FIG. 10 is a schematic view of a structural feeding device of the present invention;

FIG. 11 is a front view of the present invention structural feeder;

fig. 12 is a cross-sectional view of the feeding device of the present invention.

In the figure: 1. a housing; 2. a feeding port; 3. an adjustment device; 31. a regulating bin; 32. a slider; 33. adjusting the bolt; 34. a return spring; 4. a power chamber; 5. a first power machine; 6. a driving roller; 7. an anti-drop device; 71. an anti-drop rod; 72. an arc-shaped plate; 73. a limiting block; 8. a polishing member; 9. a feeding device; 91. a feeding seat; 92. adjusting the chute; 93. a slide bar; 94. a limiting spring; 95. a rotating seat; 96. a limiting groove; 97. a connecting rod; 98. a feed wheel; 10. a second power machine; 11. a rotating roller; 12. a third power machine; 13. a polishing disk; 14. a guide wheel rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

Referring to fig. 1-7, a polishing and grinding device for the outer circular surface of a hydraulic cylinder comprises a housing 1, wherein two sides of the housing 1 are provided with a feeding port 2, two sides of the housing 1 are provided with a rectangular hole at a position below the feeding port 2, one end of the rectangular hole is fixedly provided with an adjusting device 3, two sides of the housing 1 are provided with a power chamber 4 at a position below the feeding port 2 and close to the adjusting device 3, the inside of the power chamber 4 is fixedly sleeved with a first power machine 5, an output shaft of the first power machine 5 penetrates through the housing 1 and extends to the inside of the housing 1, one end of the output shaft of the first power machine 5 is fixedly provided with a driving roller 6 at the inside of the housing 1, the inside of the adjusting device 3 is movably sleeved with an anti-falling device 7, a polishing member 8 is placed at the top of the driving roller 6, and a feeding device 9 is fixedly provided at a position close to the bottom of one side of the inner cavity of the housing 1, the feeding device 9 is matched with the anti-falling device 7, the polishing piece 8 is contacted with the feeding device 9, a second power machine 10 is fixedly installed at the position, close to the middle, of the top of the feeding device 9, a rotating roller 11 is fixedly installed at one end of an output shaft of the second power machine 10, the rotating roller 11 is contacted with the feeding device 9, a third power machine 12 is fixedly installed at one side of an inner cavity of the shell 1 and above the feeding device 9, a polishing disc 13 is fixedly installed at one end of an output shaft of the third power machine 12, the polishing disc 13 is contacted with the polishing piece 8, a guide wheel rod 14 is fixedly installed at the position, close to two sides, of the inner cavity of the shell 1, and the guide wheel rod 14 is contacted with the anti-falling device 7.

Referring to fig. 8, the adjusting device 3 includes an adjusting bin 31, a sliding block 32 is movably installed inside the adjusting bin 31, a rectangular hole is formed in one side of the sliding block 32, an anti-slip device 7 is movably installed inside the rectangular hole, a threaded hole is formed in one side of the outer surface of the adjusting bin 31, an adjusting bolt 33 is movably sleeved inside the threaded hole, the adjusting bolt 33 extends into the adjusting bin 31 and contacts with the sliding block 32, so that the depth of the adjusting bolt 33 inserted into the adjusting bin 31 can be adjusted by rotating the adjusting bolt 33, since the adjusting bolt 33 extends into the adjusting bin 31 and contacts with the sliding block 32, the sliding block 32 is pushed to move synchronously in the process of inserting the adjusting bolt 33, at this time, the sliding block 71 is movably sleeved with the sliding block 32 through an anti-slip rod 71, so as to drive the anti-slip rod 71 to move synchronously, a sliding groove is formed in the top and the bottom of a limiting groove 96, and the sliding groove is matched with a limiting block 73, thereby realize rotating adjusting bolt 33 and can adjust the position of slide bar 93, thereby adjust the interval between drive roll 6 and the feed wheel 98, make the device can polish the tubular product of different diameters size, compare in traditional equipment and need adjust the great burnishing machine of weight, the device's the regulation degree of difficulty is less and must mediate equipment one by one, make the use of the device more convenient, one side of sliding block 32 and be located fixed mounting have reset spring 34 on the position in the adjusting bolt 33 outside, reset spring 34's one end and regulation storehouse 31 fixed connection.

Referring to fig. 9, the anti-slip device 7 includes an anti-slip rod 71, the anti-slip rod 71 is movably sleeved with the sliding block 32, an arc plate 72 is fixedly mounted at a position on one side of the anti-slip rod 71 close to two ends, the arc plate 72 corresponds to the guide wheel rod 14, the contact surface between the arc plate 72 and the guide wheel rod 14 is arc-shaped, so that when the rotating base 95 rotates with the central line of the sliding rod 93 as the rotation center, a sliding groove is formed at the top and bottom of the limiting groove 96 and is matched with the limiting block 73 to drive the anti-slip device 7 to move synchronously, because the contact surface between the arc plate 72 and the guide wheel rod 14 is arc-shaped, the guide wheel rod 14 pushes the arc plate 72 to enable the anti-slip device 7 to move towards one side of the transmission roller 6 integrally in the moving process, the feeding wheel 98 and the polishing piece 8 can always keep in contact, and the feeding wheel 98 is prevented from being deviated in the deflecting process of the rotating base 95, so that the feeding wheel 98 cannot contact with the polishing piece 8 to cause the feeding device to move 9, the stability of the device is improved, the top and the bottom of the anti-falling rod 71 are fixedly provided with limit blocks 73, the limit blocks 73 are distributed in a linear array mode, and the limit blocks 73 correspond to the feeding device 9.

Referring to fig. 10-12, the feeding device 9 includes a feeding seat 91, the top of the feeding seat 91 is provided with an adjusting chute 92, the adjusting chute 92 is distributed in a linear array manner, a sliding rod 93 is movably mounted inside the adjusting chute 92, a limiting spring 94 is fixedly mounted on one side of the sliding rod 93 and at a position inside the adjusting chute 92, the top of the sliding rod 93 is movably sleeved with a rotating seat 95, one side of the rotating seat 95 is provided with a limiting groove 96, the limiting groove 96 is matched with the anti-falling rod 71, the top and the bottom of the limiting groove 96 are provided with chutes, the sliding grooves are matched with the limiting block 73, one end of the rotating seat 95 is fixedly mounted with a connecting rod 97, the inside of the connecting rod 97 is movably sleeved with a feeding wheel 98, the feeding wheel 98 is in contact with the rotating roller 11, and the feeding wheel 98 is in contact with the polishing article 8 at the same time.

Referring to fig. 10-12, the outer surface of the rotating roller 11 is provided with threads, so that the rotating roller 11 generates a force, which has a starting point as a contact point between the feeding roller 98 and is directed to the axial direction of the feeding roller 98, by a friction force during the rotation process, the rotating base 95 deflects by taking the central line of the sliding rod 93 as a rotation center, so that the feeding roller 98 keeps a tilted state, when the polishing article 8 passes through the material inlet 2 and enters the inside of the housing 1 and contacts with the driving roller 6, the feeding roller 98 and the polishing disk 13, the polishing article 8 rotates synchronously under the rotation effect of the driving roller 6, since the polishing article 8 is in an unpolished state at this time, the friction force between the polishing article 8 and the feeding roller 98 is greater than the friction force between the rotating roller 11 and the feeding roller 98, so that the rotating base 95 starts to be aligned under this action, so that the tilt degree of the feeding roller 98 is reduced, the feeding speed of the polishing piece 8 in the shell 1 is reduced, when the roughness of the outer surface of the polishing piece 8 is reduced along with the polishing, the friction force between the polishing piece 8 and the feeding wheel 98 is smaller than the friction force between the rotating roller 11 and the feeding wheel 98, so that the rotating seat 95 deflects and the inclination degree of the feeding wheel 98 is increased, the feeding speed of the polishing piece 8 in the shell 1 is increased, when the unpolished part of the polishing piece 8 is in contact with the feeding wheel 98, the process can be continuously circulated, the polishing of the whole outer surface of the polishing piece 8 is finished, the feeding speed can be determined according to the specific polishing degree of the outer surface of the polishing piece 8 by the polishing mode of the traditional polishing machine, two problems can occur by the uniform feeding mode, one problem is that when the roughness of the outer surface of the polishing piece 8 is high, the requirement cannot be met by a single polishing, and the operation is complicated due to the fact that the polishing needs to be carried out for multiple times, the other is that when the roughness of the outer surface of the polishing piece 8 is reduced and the polishing degree is too high, the tolerance is too large, so that the pipe is scrapped, the device well avoids the point, the practicability of the device is improved, meanwhile, the whole adjusting process of the device can be automatically carried out under the condition of non-manual operation, and the automation of the device is improved.

Referring to fig. 10-12, the second power machine 10 drives the rotating roller 11 to rotate at a constant speed, and the friction between the rotating roller 11 and the feeding wheel 98 is smaller than the friction between the polishing member 8 and the feeding wheel 98 in an unpolished state and larger than the friction between the polished polishing member 8 and the feeding wheel 98.

The using method of the invention is as follows:

in the using process, the depth of the adjusting bolt 33 inserted into the adjusting bin 31 can be adjusted by rotating the adjusting bolt 33, the adjusting bolt 33 extends into the adjusting bin 31 and contacts with the sliding block 32, so that the sliding block 32 can be pushed to move synchronously in the inserting process of the adjusting bolt 33, the anti-falling rod 71 is driven to move synchronously, the position of the sliding rod 93 can be adjusted by rotating the adjusting bolt 33, the distance between the driving roller 6 and the feeding wheel 98 can be adjusted, the device can polish pipes with different diameters, the rotating roller 11 enables the feeding wheel 98 to generate an acting force with the starting point being the contact point between the driving roller 6 and the feeding wheel 98 and the pointing direction being the axial direction of the feeding wheel 98 through the friction force in the rotating process, and the rotating seat 95 deflects by taking the central line of the sliding rod 93 as the rotating center under the action force, so that the feeding wheel 98 keeps the inclined state, when the polishing element 8 passes through the material inlet 2 and enters the interior of the housing 1 and contacts the transmission roller 6, the feed wheel 98 and the polishing disk 13, the polishing element 8 synchronously rotates under the action of the rotation of the transmission roller 6, because the polishing element 8 is in an unpolished state at the moment, the friction force between the polishing element 8 and the feed wheel 98 is greater than the friction force between the rotation roller 11 and the feed wheel 98, so that the rotation seat 95 starts to rotate back under the action, the inclination degree of the feed wheel 98 is reduced, the feeding speed of the polishing element 8 in the interior of the housing 1 is reduced, when the roughness of the outer surface of the polishing element 8 is reduced along with the polishing, the friction force between the polishing element 8 and the feed wheel 98 is smaller than the friction force between the rotation roller 11 and the feed wheel 98, so that the rotation seat 95 deflects and the inclination degree of the feed wheel 98 is increased, the feeding speed of the polishing element 8 in the interior of the housing 1 is increased, when the unpolished part of the polishing member 8 contacts with the feeding wheel 98, the process can continue to circulate, so that the polishing of the outer surface of the whole polishing member 8 is completed, when the rotating seat 95 rotates by taking the central line of the sliding rod 93 as a rotating center, a sliding groove is formed in the top and the bottom of the limiting groove 96, and the sliding groove is matched with the limiting block 73 so as to drive the anti-disengaging device 7 to move synchronously, because the arc-shaped plate 72 is in arc contact with the guide wheel rod 14, the guide wheel rod 14 can push the arc-shaped plate 72 to enable the anti-disengaging device 7 to move towards one side of the transmission roller 6 integrally in the moving process of the anti-disengaging device 7, and the feeding wheel 98 and the polishing member 8 can always keep in contact.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a polishing grinding device for outer disc of pneumatic cylinder, includes shell (1), its characterized in that: the polishing machine is characterized in that material inlet openings (2) are formed in two sides of the shell (1), rectangular holes are formed in positions, located below the material inlet openings (2), of the two sides of the shell (1), an adjusting device (3) is fixedly installed at one end of each rectangular hole, a power chamber (4) is fixedly installed at a position, located below the material inlet openings (2) and close to the adjusting device (3), of the two sides of the shell (1), a first power machine (5) is fixedly sleeved inside the power chamber (4), an output shaft of the first power machine (5) penetrates through the shell (1) and extends into the shell (1), a transmission roller (6) is fixedly installed at one end of an output shaft of the first power machine (5) and located inside the shell (1), an anti-falling device (7) is movably sleeved inside the adjusting device (3), and a polishing part (8) is placed at the top of the transmission roller (6), the polishing machine is characterized in that a feeding device (9) is fixedly mounted on a position, close to the bottom, of one side of an inner cavity of the shell (1), the feeding device (9) is matched with the anti-falling device (7), the polishing piece (8) is in contact with the feeding device (9), the feeding device (9) comprises a feeding seat (91), the top of the feeding seat (91) is provided with an adjusting sliding groove (92) and the adjusting sliding groove (92) is distributed in a linear array mode, a sliding rod (93) is movably mounted inside the adjusting sliding groove (92), a limiting spring (94) is fixedly mounted on a position, located inside the adjusting sliding groove (92), of one side of the sliding rod (93), a rotating seat (95) is movably sleeved at the top of the sliding rod (93), a limiting groove (96) is formed in one side of the rotating seat (95), and a connecting rod (97) is fixedly mounted at one end of the rotating seat (95), a feed wheel (98) is movably sleeved inside the connecting rod (97), a second power machine (10) is fixedly installed on the position, close to the middle, of the top of the feeding device (9), a rotating roller (11) is fixedly installed at one end of an output shaft of the second power machine (10), the rotating roller (11) is in contact with the feeding device (9), threads are arranged on the outer surface of the rotating roller (11), a third power machine (12) is fixedly installed on one side of the inner cavity of the shell (1) and above the feeding device (9), a polishing disc (13) is fixedly installed at one end of the output shaft of the third power machine (12), the polishing disc (13) is in contact with the polishing piece (8), a guide wheel rod (14) is fixedly installed on the position, close to the two sides, of the inner cavity of the shell (1), the guide wheel rod (14) is in contact with the anti-falling device (7), the feed wheel (98) is in contact with the rotating roller (11), the feed wheel (98) is in contact with the polishing piece (8) at the same time And when the polishing piece (8) is in contact with the feeding wheel (98), the second power machine (10) drives the rotating roller (11) to rotate at a constant speed, and the friction force between the rotating roller (11) and the feeding wheel (98) is smaller than the friction force between the polishing piece (8) and the feeding wheel (98) in an unpolished state and larger than the friction force between the polished polishing piece (8) and the feeding wheel (98).

2. The polishing and grinding device for the outer circular surface of the hydraulic cylinder as claimed in claim 1, wherein: adjusting device (3) are including regulation storehouse (31), the inside movable mounting of regulation storehouse (31) has sliding block (32), the inside movable mounting that rectangular hole and this rectangular hole were seted up to one side of sliding block (32) has anticreep device (7), adjusting bolt (33) have been cup jointed in the inside activity that threaded hole and this threaded hole were seted up to one side of regulation storehouse (31) surface, adjusting bolt (33) extend to the inside of regulation storehouse (31) and contact with sliding block (32), fixed mounting has reset spring (34) on one side of sliding block (32) and the position that is located the adjusting bolt (33) outside, the one end and the regulation storehouse (31) fixed connection of reset spring (34).

3. The polishing and grinding device for the outer circular surface of the hydraulic cylinder as claimed in claim 2, wherein: anticreep device (7) are including anticreep pole (71), anticreep pole (71) cup joint with sliding block (32) activity, fixed mounting has arc (72) and is corresponding with leading wheel pole (14) on anticreep pole (71) one side is close to the position at both ends, arc is personally submitted with the contact of leading wheel pole (14) in arc (72), the top and the bottom fixed mounting of anticreep pole (71) have stopper (73) and stopper (73) linear array's mode to distribute along the line, stopper (73) are corresponding with feeding device (9).

4. The polishing and grinding device for the outer circular surface of the hydraulic cylinder as claimed in claim 3, wherein: the limiting groove (96) is matched with the anti-falling rod (71), sliding grooves are formed in the top and the bottom of the limiting groove (96) and matched with the limiting block (73).