CN218341771U

CN218341771U - Metal tube polishing device for machining of mechanical parts

Info

Publication number: CN218341771U
Application number: CN202221823483.1U
Authority: CN
Inventors: 许华智
Original assignee: Nantong Yuanchen Measurement And Control Equipment Co ltd
Current assignee: Nantong Yuanchen Measurement And Control Equipment Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2023-01-20
Anticipated expiration: 2032-07-14

Abstract

The utility model relates to a metal tube polishing device for machining mechanical accessories, which comprises a box body, an adjusting component, a transmission component, a first polishing component and a second polishing component; the adjusting component is arranged in the box body, the transmission component is located above the adjusting component, the input end of the transmission component is connected with the adjusting component, the first polishing component is located on one side of the transmission component, the second polishing component is located on the other side of the first polishing component, and the second polishing component is connected with the output end of the adjusting component. The utility model discloses an adjusting part can be adjusted according to the diameter of tubular metal resonator the position of transmission assembly, so that transmission assembly can carry the tubular metal resonator of different diameters, through first polish the subassembly with the subassembly is polished to the second, not only can polish the outer wall of tubular metal resonator, and can polish to the port department of tubular metal resonator, has improved the polishing efficiency to the tubular metal resonator greatly, has reduced the cost of labor.

Description

Metal tube polishing device for machining of mechanical parts

Technical Field

The utility model relates to a machine parts processing technology field especially relates to a tubular metal resonator burnishing device is used in machine parts processing.

Background

The metal pipe is widely applied in modern production and is mainly applied to the fields of thermal equipment, petroleum geology, chemical industry and the like. Metal tubes are primarily composed of steel and, in use, are typically polished.

In prior art, when polishing the outer wall of tubular metal resonator, need the manual work to carry the tubular metal resonator to the equipment of polishing usually, and the equipment of polishing that has now only is applied to the metal special pipe of the same kind of diameter usually and polishes, and can't fully polish to the port department of tubular metal resonator, greatly reduced polishing efficiency, consequently, the urgent need for improvement.

SUMMERY OF THE UTILITY MODEL

The technical defect that exists for prior art, the utility model provides a tubular metal resonator burnishing device is used in machine parts processing can effectively solve the problem in the background art.

In order to solve the technical problem, the utility model provides a technical scheme specifically as follows:

the embodiment of the utility model discloses a metal tube polishing device for machining mechanical accessories, which comprises a box body, an adjusting component, a transmission component, a first polishing component and a second polishing component; the adjusting component is arranged in the box body, the transmission component is located above the adjusting component, the input end of the transmission component is connected with the adjusting component, the first polishing component is located on one side of the transmission component, the second polishing component is located on the other side of the first polishing component, and the second polishing component is connected with the output end of the adjusting component.

In any of the above schemes, preferably, the adjusting assembly includes an adjusting motor, a first belt pulley, a first lead screw, a second belt pulley, a second lead screw, a first chain wheel and a second chain wheel; the adjusting motor with box inner wall fixed connection, the fixed cover of first belt pulley is located the adjusting motor output, first lead screw is located adjusting motor one side, just first lead screw one end with the inside bottom surface of box rotates to be connected, the fixed cover of second belt pulley is located on the first lead screw, the second lead screw is located first lead screw opposite side, just second lead screw one end with the inside bottom surface of box rotates to be connected, first sprocket is located second belt pulley top, just first sprocket fixed cover is located on the first lead screw, the fixed cover of second sprocket is located on the second lead screw, wherein, first belt pulley with the second belt pulley passes through the belt and connects, first sprocket with the second sprocket passes through the chain and connects.

In any of the above aspects, preferably, the gear ratio of the second sprocket to the first sprocket is 2:1; in actual operation, by setting the gear ratio of the second sprocket to the first sprocket to 2:1, the angular speed of the second lead screw can be one half of that of the first lead screw when the second lead screw rotates.

In any of the above embodiments, it is preferable that the adjustment motor operates to rotate the first pulley, the first lead screw is rotated by cooperation between the first pulley and the second pulley, and the second lead screw is rotated by cooperation between the first sprocket and the second sprocket.

In any one of the above schemes, preferably, the transmission assembly includes a first lifting plate, a supporting portion, a first conveying portion, a second conveying portion and a first limiting rod, the first lifting plate is located above the first chain wheel, the first lifting plate is in threaded connection with the first lead screw, the bottom of the supporting portion is fixed at the top of the first lifting plate, the first conveying portion is located on one side of the supporting portion, one end of the first conveying portion is connected with the top of the first lifting plate, the second conveying portion is located above the first conveying portion, the first limiting rod penetrates through the first lifting plate, and one end of the first limiting rod is fixedly connected with the bottom surface inside the box body.

In any of the above schemes, preferably, the support portion includes a support rod and an arc-shaped support plate, one end of the support rod is fixedly connected to the top of the first lifting plate, and the other end of the support rod is fixedly connected to the bottom of the arc-shaped support plate.

In any one of the above schemes, preferably, the first transmission part includes a first fixing rod and a first pulley, one end of the first fixing rod is fixedly connected to the top of the first lifting plate, and the other end of the first fixing rod is rotatably connected to the first pulley through a bearing.

In any of the above schemes, preferably, the second conveying part includes a conveying motor, a conveying shaft rod, a driving wheel, a second fixing rod, a second pulley, a pulley shaft rod, and a driven wheel, the conveying motor is fixed at the top of the box body, one end of the conveying shaft rod is fixedly connected with an output end of the conveying motor, and the driving wheel is fixedly sleeved on the conveying shaft rod so as to rotate the driving wheel through the work of the conveying motor; one end of the second fixing rod is fixedly connected with the top surface inside the box body, the other end of the second fixing rod is rotatably connected with the pulley shaft rod, one end of the pulley shaft rod is sleeved with the second pulley, the other end of the pulley shaft rod penetrates through the outside of the box body and is sleeved with the driven wheel, and the driven wheel is connected with the driving wheel through a belt.

In any of the above schemes, preferably, the second pulley is rotated by the driving wheel and the driven wheel, and further, the first lead screw is rotated by the operation of the adjusting motor to adjust the height of the first lifting plate, so that the outer wall of the metal pipe is in contact connection with the first pulley and the second pulley, and the metal pipe is horizontally moved by the second pulley and the first pulley.

In any of the above schemes, preferably, the first grinding assembly comprises a support plate, a first grinding motor, a grinding cylinder, a main chain wheel, a sprocket, a first telescopic rod and an annular grinding block; the utility model discloses a polishing machine, including box, backup pad, first grinding motor, sprocket, grinding cylinder, chain, the backup pad is provided with two sets ofly, just backup pad one end is fixed in the inside top surface of box, first grinding motor is fixed in the box top, grinding cylinder passes through the concave part and is connected with two sets of the backup pad rotates, the fixed cover of main chain wheel is located first grinding motor output, the sprocket set up in grinding cylinder outer wall, just the sprocket with the main chain wheel passes through the chain and connects, first telescopic link one end with grinding cylinder inner wall fixed connection, the first telescopic link other end with annular grinding block fixed connection.

In any of the above schemes, preferably, the first telescopic rod can enable the annular polishing block to be in abutting connection with the outer wall of the metal pipe, the main chain wheel can be driven to rotate through the work of the first polishing motor, and then the polishing barrel can be rotated through the matching between the main chain wheel and the chain teeth, so that the metal pipe can be circumferentially polished through the annular polishing block.

In any of the above schemes, preferably, the second polishing assembly includes a second lifting plate, a connecting plate, a turntable, a transmission rod, an adjustable polishing portion, a second polishing motor, a second limiting rod, a third belt pulley and a fourth belt pulley; the second lifting plate is located above the second chain wheel, the second lifting plate is in threaded connection with the second lead screw, the second limiting rod penetrates through the second lifting plate, one end of the second limiting rod is fixedly connected with the bottom surface inside the box body, one end of the connecting plate is fixedly connected with the top of the second lifting plate, the rotary plate is located on one side of the connecting plate, one end of the transmission rod is fixedly connected with the rotary plate, the other end of the transmission rod penetrates through the connecting plate and is fixedly provided with a fourth belt pulley, an adjustable polishing portion is arranged on the other side of the rotary plate, the second polishing motor is fixed on the second lifting plate, the third belt pulley is fixedly sleeved on the output end of the second polishing motor, and the third belt pulley is connected with the fourth belt pulley through a belt.

In any of the above schemes, preferably, the first lead screw can be rotated by the operation of the adjusting motor, and further, the second lead screw can be rotated synchronously by the cooperation of the first chain wheel and the second chain wheel, so that the central point of the adjustable polishing part on the second lifting plate and the central point of the metal pipe can be always on the same horizontal line; and then, through the work of second grinding motor reaches the third belt pulley with cooperation between the fourth belt pulley can make the carousel drives adjustable portion of polishing rotates to the realization passes through adjustable portion of polishing polishes and polishes the port department of tubular metal resonator.

In any of the above schemes, preferably, the adjustable polishing portion includes a central shaft, an arc-shaped polishing groove, and a second telescopic rod, the central shaft is fixed at the center of the turntable, one end of the second telescopic rod is fixedly connected with the central shaft, and the other end of the second telescopic rod is fixedly connected with the arc-shaped polishing groove.

In any of the above schemes, preferably, when polishing the metal pipes with different diameters, the length of the second telescopic rod can be adjusted, so that the arc-shaped polishing groove can meet the end openings of the metal pipes with different diameters, and the end openings of the metal pipes with different diameters can be polished.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a tubular metal resonator polishing transposition, through adjusting part can adjust according to the diameter of tubular metal resonator the position of transmission assembly, so that transmission assembly can carry the tubular metal resonator of different diameters, through first polishing subassembly with the second subassembly of polishing not only can polish the outer wall of tubular metal resonator, and can polish the port department of tubular metal resonator, has improved the polishing efficiency to the tubular metal resonator greatly, has reduced the cost of labor.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrating embodiments of the invention.

FIG. 1 is a schematic structural view of a transmission assembly of the metal tube polishing apparatus for machining mechanical parts of the present invention;

FIG. 2 is a schematic structural view of a first polishing assembly and a second polishing assembly of the metal tube polishing device for machining mechanical parts of the present invention;

FIG. 3 is a schematic structural view of an adjusting assembly of the metal tube polishing device for machining mechanical parts of the present invention;

FIG. 4 is a schematic view of the structure of the polishing barrel of the metal tube polishing device for machining mechanical parts of the present invention;

FIG. 5 is a left side view of the polishing barrel of the metal tube polishing device for machining mechanical parts of the present invention;

FIG. 6 is a schematic view of the adjustable polishing portion of the polishing apparatus for metal tubes used in machining mechanical parts according to the present invention;

FIG. 7 is a schematic structural view of an adjustable polishing portion of the polishing device for machining metal tubes of the present invention.

The reference numbers in the figures illustrate:

1. a box body; 2. an adjustment assembly; 3. a transmission assembly; 4. a first sanding assembly; 5. a second grinding assembly; 21. adjusting the motor; 22. a first pulley; 23. a first lead screw; 24. a second pulley; 25. a second lead screw; 26. a first sprocket; 27. a second sprocket; 31. a first lifter plate; 32. a support portion; 33. a first conveying section; 34. a second transfer section; 35. a first limit rod; 321. a support bar; 322. an arc-shaped supporting plate; 331. a first fixing lever; 332. a first pulley; 341. a transfer motor; 342. a transfer shaft; 343. a driving wheel; 344. a second fixing bar; 345. a second pulley; 346. a driven wheel; 41. a support plate; 42. a first sanding motor; 43. polishing the barrel; 44. a main sprocket; 45. a sprocket; 46. a first telescopic rod; 47. an annular sanding block; 51. a second lifter plate; 52. a connecting plate; 53. a turntable; 54. a transmission rod; 55. the polishing part can be adjusted; 56. a second grinding motor; 57. a second limiting rod; 551. a central shaft; 552. an arc-shaped grinding groove; 553. a second telescopic rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In order to better understand the technical solution, the technical solution of the present invention will be described in detail with reference to the drawings and the detailed description.

The utility model provides a metal tube polishing device for machining mechanical accessories, which comprises a box body 1, an adjusting component 2, a transmission component 3, a first polishing component 4 and a second polishing component 5; the adjusting component 2 is arranged in the box body 1, the transmission component 3 is positioned above the adjusting component 2, the input end of the transmission component 3 is connected with the adjusting component 2, the first polishing component 4 is positioned on one side of the transmission component 3, the second polishing component 5 is positioned on the other side of the first polishing component 4, and the second polishing component 5 is connected with the output end of the adjusting component 2.

The adjusting assembly 2 comprises an adjusting motor 21, a first belt pulley 22, a first lead screw 23, a second belt pulley 24, a second lead screw 25, a first chain wheel 26 and a second chain wheel 27; adjusting motor 21 with 1 inner wall fixed connection of box, first belt pulley 22 fixed cover is located adjusting motor 21 output, first lead screw 23 is located adjusting motor 21 one side, just first lead screw 23 one end with the inside bottom surface of box is rotated and is connected, second belt pulley 24 fixed cover is located on the first lead screw 23, second lead screw 25 is located first lead screw 23 opposite side, just second lead screw 25 one end with the inside bottom surface of box is rotated and is connected, first sprocket 26 is located second belt pulley 24 top, just first sprocket 26 is fixed cover is located on the first lead screw 23, second sprocket 27 fixed cover is located on the second lead screw 25, wherein, first belt pulley 22 with second belt pulley 24 passes through the belt and connects, first sprocket 26 with second sprocket 27 passes through the chain and connects.

The gear ratio of the second sprocket 27 to the first sprocket 26 is 2:1; in actual operation, by setting the gear ratio of the second sprocket 27 to the first sprocket 26 to 2:1, the angular speed of the second lead screw can be one half of that of the first lead screw when the second lead screw rotates.

In a specific embodiment, the adjustment motor 21 is operated to rotate the first pulley 22, the first lead screw 23 is rotated by the engagement between the first pulley 22 and the second pulley 24, and the second lead screw 25 is rotated by the engagement between the first sprocket 26 and the second sprocket 27.

Transmission assembly 3 includes first lifter plate 31, supporting part 32, first transfer portion 33, second transfer portion 34 and first gag lever post 35, first lifter plate 31 is located first sprocket 26 top, just first lifter plate 31 with first lead screw 23 threaded connection, supporting part 32 bottom is fixed in first lifter plate 31 top, first transfer portion 33 is located supporting part 32 one side, just first transfer portion 33 one end with first lifter plate 31 top is connected, second transfer portion 35 is located first transfer portion 33 top, first gag lever post 35 wears to locate first lifter plate 31, just first gag lever post 35 one end with the inside bottom surface fixed connection of box 1.

The supporting portion 32 comprises a supporting rod 321 and an arc-shaped supporting plate 322, one end of the supporting rod 321 is fixedly connected with the top of the first lifting plate 31, and the other end of the supporting rod 321 is fixedly connected with the bottom of the arc-shaped supporting plate 322.

The first transmission part 33 includes a first fixing rod 331 and a first pulley 332, one end of the first fixing rod 331 is fixedly connected to the top of the first lifting plate 31, and the other end of the first fixing rod 331 is rotatably connected to the first pulley 332 through a bearing.

The second conveying part 34 includes a conveying motor 341, a conveying shaft 342, a driving wheel 343, a second fixing rod 344, a second pulley 345, a pulley shaft, and a driven wheel 346, the conveying motor 341 is fixed on the top of the box 1, one end of the conveying shaft 342 is fixedly connected with the output end of the conveying motor 341, and the driving wheel 343 is fixedly secured to the conveying shaft 342 to rotate the driving wheel 343 through the operation of the conveying motor 341; one end of the second fixing rod 344 is fixedly connected to the top surface inside the case 1, the other end of the second fixing rod 344 is rotatably connected to the pulley shaft, one end of the pulley shaft is sleeved with the second pulley 345, the other end of the pulley shaft penetrates through the outside of the case 1 and is sleeved with the driven wheel 346, and the driven wheel 346 is connected to the driving wheel 343 through a belt.

In a specific embodiment, the second pulley 345 is rotated by the driving wheel 343 and the driven wheel 346, and further, the first lead screw 23 is rotated by the operation of the adjusting motor 21 to adjust the height of the first lifting plate 31, so that the outer wall of the metal pipe is in interference connection with the first pulley 332 and the second pulley 345, and the metal pipe is horizontally moved by the second pulley 345 and the first pulley 332.

The first grinding assembly 4 comprises a supporting plate 41, a first grinding motor 42, a grinding cylinder 43, a main chain wheel 44, a chain tooth 45, a first telescopic rod 46 and an annular grinding block 47; the utility model discloses a grinding machine, including box 1, backup pad 41, first grinding motor 42, chain tooth 45, grinding cylinder 43, supporting plate 41, first grinding motor 42, first chain wheel 44, chain tooth 45, first telescopic link 46 one end with grinding cylinder 43 inner wall fixed connection, first telescopic link 46 other end with annular grinding block 47 fixed connection, grinding cylinder 43 is connected with two sets of through the concave part backup pad 41 rotates, the fixed cover of main chain wheel 44 is located first grinding motor 42 output, chain tooth 45 set up in grinding cylinder 43 outer wall, just chain tooth 45 with main chain wheel 44 passes through the chain and connects, first telescopic link 46 one end with grinding cylinder 43 inner wall fixed connection, first telescopic link 46 other end with annular grinding block 47 fixed connection.

In a specific embodiment, the first telescopic rod 46 can enable the annular polishing block 47 to be in contact connection with the outer wall of the metal pipe, the main chain wheel 44 can be driven to rotate by the operation of the first polishing motor 42, and the polishing cylinder 43 can be rotated by the cooperation between the main chain wheel 44 and the chain teeth 45, so that the metal pipe can be circumferentially polished by the annular polishing block 47.

The second polishing assembly 5 comprises a second lifting plate 51, a connecting plate 52, a turntable 53, a transmission rod 54, an adjustable polishing part 55, a second polishing motor 56, a second limiting rod 57, a third belt pulley and a fourth belt pulley; the second lifter plate 51 is located second sprocket 27 top, just the second lifter plate 51 with second lead screw 25 threaded connection, second gag lever post 57 wears to locate second lifter plate 51, just second gag lever post 57 one end with the inside bottom surface fixed connection of box 1, connecting plate 52 one end with second lifter plate 51 top fixed connection, carousel 53 is located connecting plate 52 one side, transfer line 54 one end with carousel 53 fixed connection, the transfer line 54 other end runs through connecting plate 52 is fixed with the fourth belt pulley, adjustable portion of polishing 55 set up in carousel 53 opposite side, second polishing motor 56 is fixed in on the second lifter plate 51, the fixed cover of third belt pulley is located second polishing motor 56 output, the third belt pulley with the fourth belt pulley passes through the belt and connects.

In a specific embodiment, the first lead screw 23 can be rotated by the operation of the adjusting motor 21, and further, the second lead screw 25 can be synchronously rotated by the cooperation of the first chain wheel 26 and the second chain wheel 27, so that the central point of the adjustable polishing portion 55 on the second lifting plate 51 and the central point of the metal pipe can be always on the same horizontal line; and then, through the work of second grinding motor 56 reaches the third belt pulley with cooperation between the fourth belt pulley can make carousel 53 drives adjustable portion 55 of polishing rotates, in order to realize passing through adjustable portion 55 of polishing polishes the port department of tubular metal resonator.

The adjustable grinding portion 55 comprises a central shaft 551, an arc-shaped grinding groove 552 and a second telescopic rod 553, wherein the central shaft 551 is fixed at the center of the turntable 53, one end of the second telescopic rod 553 is fixedly connected with the central shaft 551, and the other end of the second telescopic rod 553 is fixedly connected with the arc-shaped grinding groove 552.

In a specific embodiment, when polishing metal pipes with different diameters, the length of the second extension rod 553 can be adjusted so that the arc-shaped polishing groove 552 can meet the end openings of the metal pipes with different diameters, thereby polishing the end openings of the metal pipes with different diameters.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a tubular metal resonator burnishing device is used in machine parts processing which characterized in that: comprises a box body (1), an adjusting component (2), a transmission component (3), a first grinding component (4) and a second grinding component (5); the grinding device is characterized in that the adjusting component (2) is arranged inside the box body (1), the transmission component (3) is located above the adjusting component (2), the input end of the transmission component (3) is connected with the adjusting component (2), the first grinding component (4) is located on one side of the transmission component (3), the second grinding component (5) is located on the other side of the first grinding component (4), and the second grinding component (5) is connected with the output end of the adjusting component (2).

2. The metal tube polishing device for machining a mechanical component as set forth in claim 1, wherein: the adjusting assembly (2) comprises an adjusting motor (21), a first belt pulley (22), a first lead screw (23), a second belt pulley (24), a second lead screw (25), a first chain wheel (26) and a second chain wheel (27); adjusting motor (21) with box (1) inner wall fixed connection, the fixed cover of first belt pulley (22) is located adjusting motor (21) output, first lead screw (23) are located adjusting motor (21) one side, just first lead screw (23) one end with the inside bottom surface of box (1) rotates and connects, second belt pulley (24) fixed cover is located on first lead screw (23), second lead screw (25) are located first lead screw (23) opposite side, just second lead screw (25) one end with the inside bottom surface of box (1) rotates and connects, first sprocket (26) are located second belt pulley (24) top, just first sprocket (26) fixed cover is located on first lead screw (23), second sprocket (27) fixed cover is located on second lead screw (25), first belt pulley (22) with second belt pulley (24) pass through the belt and connect, first sprocket (26) with second sprocket (27) pass through the chain and connect.

3. The metal tube polishing device for machining a mechanical fitting according to claim 2, wherein: the gear ratio of the second chain wheel (27) to the first chain wheel (26) is 2:1.

4. the metal tube polishing device for machining a mechanical fitting according to claim 3, wherein: transmission assembly (3) include first lifter plate (31), supporting part (32), first conveying portion (33), second conveying portion (34) and first gag lever post (35), first lifter plate (31) are located first sprocket (26) top, just first lifter plate (31) with first lead screw (23) threaded connection, supporting part (32) bottom is fixed in first lifter plate (31) top, first conveying portion (33) are located supporting part (32) one side, just first conveying portion (33) one end with first lifter plate (31) top is connected, second conveying portion (34) are located first conveying portion (33) top, first gag lever post (35) are worn to locate first lifter plate (31), just first gag lever post (35) one end with the inside bottom surface fixed connection of box (1).

5. The metal tube polishing device for machining a mechanical fitting according to claim 4, wherein: the supporting part (32) comprises a supporting rod (321) and an arc-shaped supporting plate (322), one end of the supporting rod (321) is fixedly connected with the top of the first lifting plate (31), and the other end of the supporting rod (321) is fixedly connected with the bottom of the arc-shaped supporting plate (322).

6. The metal tube polishing device for machining a mechanical fitting according to claim 5, wherein: the first conveying part (33) comprises a first fixing rod (331) and a first pulley (332), one end of the first fixing rod (331) is fixedly connected with the top of the first lifting plate (31), and the other end of the first fixing rod (331) is rotatably connected with the first pulley (332) through a bearing.

7. The metal tube polishing device for machining a mechanical fitting according to claim 6, wherein: the second conveying part (34) comprises a conveying motor (341), a conveying shaft rod (342), a driving wheel (343), a second fixing rod (344), a second pulley (345), a pulley shaft rod and a driven wheel (346), the conveying motor (341) is fixed at the top of the box body (1), one end of the conveying shaft rod (342) is fixedly connected with the output end of the conveying motor (341), and the driving wheel (343) is fixedly sleeved on the conveying shaft rod (342) so as to enable the driving wheel (343) to rotate through the work of the conveying motor (341); one end of the second fixing rod (344) is fixedly connected with the inner top surface of the box body (1), the other end of the second fixing rod (344) is rotatably connected with the pulley shaft rod, one end of the pulley shaft rod is sleeved with the second pulley (345), the other end of the pulley shaft rod penetrates through the outer portion of the box body (1) and is sleeved with the driven wheel (346), and the driven wheel (346) is connected with the driving wheel (343) through a belt.

8. The metal tube polishing device for machining a mechanical fitting according to claim 7, wherein: the first grinding assembly (4) comprises a supporting plate (41), a first grinding motor (42), a grinding cylinder (43), a main chain wheel (44), a chain tooth (45), a first telescopic rod (46) and an annular grinding block (47); the grinding machine is characterized in that the supporting plate (41) is provided with two sets, one end of the supporting plate (41) is fixed on the inner top surface of the box body (1), the first grinding motor (42) is fixed on the top of the box body (1), the grinding cylinder (43) is connected with the supporting plate (41) in a rotating mode through the groove portion, the main chain wheel (44) is fixedly sleeved on the output end of the first grinding motor (42), the chain teeth (45) are arranged on the outer wall of the grinding cylinder (43), the chain teeth (45) are connected with the main chain wheel (44) through a chain, one end of the first telescopic rod (46) is fixedly connected with the inner wall of the grinding cylinder (43), and the other end of the first telescopic rod (46) is fixedly connected with the annular grinding block (47).

9. The metal tube polishing device for machining a mechanical fitting according to claim 8, wherein: the second grinding assembly (5) comprises a second lifting plate (51), a connecting plate (52), a rotary table (53), a transmission rod (54), an adjustable grinding part (55), a second grinding motor (56), a second limiting rod (57), a third belt pulley and a fourth belt pulley; second lifter plate (51) is located second sprocket (27) top, just second lifter plate (51) with second lead screw (25) threaded connection, second gag lever post (57) is worn to locate second lifter plate (51), just second gag lever post (57) one end with box (1) inside bottom surface fixed connection, connecting plate (52) one end with second lifter plate (51) top fixed connection, carousel (53) are located connecting plate (52) one side, transfer line (54) one end with carousel (53) fixed connection, transfer line (54) other end runs through connecting plate (52) and is fixed with the fourth belt pulley, adjustable portion of polishing (55) set up in carousel (53) opposite side, second motor of polishing (56) is fixed in on second lifter plate (51), the third belt pulley is fixed the cover and is located second motor of polishing (56) output, the third belt pulley with the fourth belt pulley passes through the belt connection.

10. The metal tube polishing device for machining a mechanical fitting according to claim 9, wherein: the adjustable grinding part (55) comprises a central shaft rod (551), an arc grinding groove (552) and a second telescopic rod (553), wherein the central shaft rod (551) is fixed at the center of the rotary table (53), one end of the second telescopic rod (553) is fixedly connected with the central shaft rod (551), and the other end of the second telescopic rod (553) is fixedly connected with the arc grinding groove (552).