CN210189391U

CN210189391U - Tubular part surface grinding device

Info

Publication number: CN210189391U
Application number: CN201921252492.8U
Authority: CN
Inventors: Wu Zhou; 周武
Original assignee: Guangzhou Yitu Mechanical And Electrical Technology Co Ltd
Current assignee: Guangzhou Yitu Mechanical And Electrical Technology Co Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-03-27
Anticipated expiration: 2029-08-02

Abstract

The utility model relates to the field of processing tubular parts, in particular to a tubular part surface polishing device, which comprises a workbench, a horizontal moving mechanism, a positioning mechanism and a polishing mechanism, wherein the horizontal moving mechanism comprises a horizontal track component and a driving component, the horizontal track component is positioned at the top of the workbench, the driving component can be horizontally moved and is arranged inside the horizontal track component, the polishing mechanism comprises a left end clamping component and a right end positioning component, the left end clamping component and the right end positioning component are symmetrical and are arranged at the top of the driving component at intervals, the polishing mechanism comprises a lifting component and a polisher, the lifting component is positioned above the left end clamping component and the right end positioning component, the polisher is vertically arranged at the working end of the lifting component, the working end of the polisher is horizontally arranged downwards, the device needs to be sequentially loaded and can automatically polish tubular parts, the polishing efficiency is improved.

Description

Tubular part surface grinding device

Technical Field

The utility model relates to a tubulose parts machining field, concretely relates to tubulose parts surface grinding device.

Background

After the production of general tubular parts, the surfaces of the tubular parts are oxidized and rusted due to overlong placing or transporting time, and meanwhile, other sundries such as bonded sand, welding slag and the like can also exist on the surfaces of the tubular parts to influence the subsequent processing procedures such as coating an anticorrosive coating and the like, so the surfaces of the tubular parts are generally required to be polished and derusted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tubulose part surface grinding device, this equipment need material loading in proper order to can polish the tubulose part is automatic, improve the efficiency of polishing.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a tubulose part surface grinding device, comprises a workbench, still include horizontal migration mechanism, positioning mechanism and grinding machanism, horizontal migration mechanism includes horizontal track subassembly and drive assembly, horizontal track subassembly is located the top of workstation, drive assembly can horizontal migration set up in the inside of horizontal track group price, grinding machanism includes left end clamping component and right-hand member locating component, left end clamping component and right-hand member locating component symmetry and interval setting are at drive assembly's top, grinding machanism includes lifting unit and polisher, lifting unit is located the top of left end clamping component and right-hand member locating component, the polisher is the work end of vertical setting at lifting unit, the work end of polisher is the level and sets up downwards.

Preferably, the driving assembly comprises a hollow driving frame, a rectangular supporting transverse plate and a double-shaft motor, the supporting transverse plate is horizontally arranged above the workbench, the left end clamping assembly and the right end positioning assembly are respectively arranged at two ends of the top of the supporting transverse plate, the driving frame is horizontally arranged and fixedly arranged at the center of the bottom of the supporting transverse plate, the double-shaft motor is horizontally and fixedly arranged at one end inside the driving frame, and two output ends of the double-shaft motor are respectively provided with a first rotating rod extending to two sides outside the driving frame, the driving frame is respectively provided with a first bearing corresponding to each first rotating rod one by one, each first rotating rod can respectively extend to the outside of the driving frame through an inner ring of each first bearing in a rotating mode, the extending end of each first rotating rod is respectively provided with a first moving gear, and each first moving gear is respectively vertically and fixedly installed at the extending end of each first rotating rod.

Preferably, the one end that biax motor was kept away from to drive frame's inside is equipped with the second rotary rod, second rotary rod and first rotary rod parallel arrangement, and the both ends of second rotary rod extend to drive frame's outside both sides respectively, drive frame is last be equipped with the second bearing with the both ends one-to-one of second rotary rod respectively, the both ends of second rotary rod can the pivoted respectively pass the inner circle of every second bearing and extend to drive frame's outside, two extension ends of second rotary rod are equipped with respectively and are vertical setting at the second and remove the gear.

Preferably, the horizontal rail assembly comprises two racks and two guide rods, the two racks are respectively arranged on two sides of the top of the supporting transverse plate along the length direction of the supporting transverse plate, the two guide rods are arranged between the two racks in parallel and at intervals, each rack is respectively positioned below each first moving wheel and each second moving wheel, each first moving wheel and each second moving wheel are respectively meshed with each rack, two ends of each guide rod are respectively fixedly connected with the top of the workbench through fixing blocks, and each corner of the bottom of the driving frame is respectively provided with a guide sleeve capable of sliding on each guide rod.

Preferably, left end clamping component includes rotating electrical machines, riser and chuck, and the riser is vertical fixed mounting in the top one end of supporting the diaphragm, and the rotating electrical machines is horizontal fixed mounting on the lateral wall of riser, and the chuck is the vertical other one side that is located the riser, and the output of rotating electrical machines can the pivoted run through the one end fixed connection of riser and chuck.

Preferably, the right end positioning assembly comprises a first cylinder, a second vertical plate and a guide post, the second vertical plate is vertically and fixedly installed at one end, far away from the first vertical plate, of the top of the supporting transverse plate, the first cylinder is horizontally and fixedly installed at one side, far away from the first vertical plate, of the first vertical plate, the output end of the first cylinder extends towards the direction of the first vertical plate, the axis of the first cylinder is the same as that of the chuck, the guide post is horizontally arranged at the output end of the first cylinder, one end of the guide post is fixedly connected with the output end of the first cylinder, one end, far away from the first cylinder, of the guide post is provided with a cylindrical cutting groove, a third bearing is arranged inside the cylindrical cutting groove, the third bearing is vertically and fixedly installed inside the cylindrical cutting groove, the inner ring of the third bearing is provided with a rotating shaft, one end of the rotating shaft can be rotatably inserted into the inner ring of the third, the extension end of rotation axis is equipped with the conflict post that can conflict the pipe fitting, and the center department of conflict post is equipped with the reference column, is equipped with on the second riser to be used for dodging of guide post removal and wears the mouth.

Preferably, lifting unit is including falling U type support frame and second cylinder, falls U type support and is located between first riser and the second riser to bottom both ends between the falling U type respectively with the top fixed connection of workstation, the second cylinder is vertical setting at the top of falling U type support, the output of second cylinder sets up downwards, be equipped with on the falling U type support and be used for dodging of second cylinder output removal and wear the mouth, the output of second cylinder is equipped with the mounting panel that is the level setting, the polisher is vertical setting in the bottom of mounting panel.

The utility model has the advantages that: a polishing device for the surface of a tubular part is characterized in that when the polishing device is used for processing, a pipe fitting is placed on a supporting transverse plate through a manual or mechanical arm, one end of the pipe fitting is butted with a chuck, the chuck clamps and positions one end of the pipe fitting, when a right-end positioning assembly abuts and positions the other end of the pipe fitting, a rotating motor is started, the rotating motor drives the chuck to rotate and simultaneously drives the pipe fitting to rotate at a high speed, when the chuck clamps one end of the pipe fitting, a first air cylinder is started, the first air cylinder drives a guide post, the contact post and the positioning post move towards the other end of the pipe fitting, one end of the positioning post is inserted into one end of the pipe fitting to be positioned, one end of the contact post abuts against one end of the pipe fitting, when the pipe fitting rotates, a rotating shaft and a third bearing are arranged to prevent the guide post from rotating, when the pipe fitting is clamped and positioned by, and drive polisher downstream simultaneously, make the surface of the work end conflict pipe fitting of polisher polish, when the polisher polishes the pipe fitting, finish polishing when the one end of pipe fitting, it is rotatory to start two first rotary rods and first removal gear of double-shaft motor drive simultaneously, when every first removal gear removes, every second removal gear that sets up plays the effect of supplementary removal, when driving frame removes, the guide bar and the uide bushing that set up play the spacing effect of direction, every first removal gear and every second gear remove along the rack respectively, make driving frame horizontal migration, and drive the pipe fitting simultaneous movement that is pressed from both sides tightly on the support diaphragm simultaneously, polish until the whole work end with the surface of pipe fitting with the polisher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic perspective view of a first embodiment of the present invention;

fig. 2 is a schematic perspective view illustrating a second embodiment of the present invention;

fig. 3 is a front view of an embodiment of the present invention;

fig. 4 is a schematic view of a partial three-dimensional structure according to an embodiment of the present invention;

fig. 5 is a partially exploded view of an embodiment of the present invention;

in the figure: the automatic grinding machine comprises a workbench 1, a horizontal rail assembly 2, a driving assembly 3, a left-end clamping assembly 4, a right-end positioning assembly 5, a lifting assembly 6, a grinding machine 7, a driving frame 8, a supporting transverse plate 9, a double-shaft motor 10, a first rotating rod 11, a first moving gear 12, a second rotating rod 13, a second moving gear 14, a rack 15, a guide rod 16, a guide sleeve 17, a rotating motor 18, a first vertical plate 19, a chuck 20, a first air cylinder 21, a second vertical plate 22, a guide column 23, a rotating shaft 24, an abutting column 25, a third bearing 26, a positioning column 27, an inverted-U-shaped supporting frame 28, a second air cylinder 29 and a mounting plate 30.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, a tubular part surface grinding device, including workstation 1, still include horizontal migration mechanism, positioning mechanism and polisher 7 mechanism, horizontal migration mechanism includes horizontal track subassembly 2 and drive assembly 3, horizontal track subassembly 2 is located the top of workstation 1, drive assembly 3 can horizontal migration's setting is in the inside of horizontal track group price, polisher 7 mechanism includes left end clamping component 4 and right-hand member locating component 5, left end clamping component 4 and right-hand member locating component 5 symmetry and interval set up the top at drive assembly 3, polishing mechanism includes lifting unit 6 and polisher 7, lifting unit 6 is located the top of left end clamping component 4 and right-hand member locating component 5, polisher 7 is vertical setting at lifting unit 6's work end, polisher 7's work end is the level and sets up downwards.

The driving assembly 3 comprises a hollow driving frame 8, a rectangular supporting transverse plate 9 and a double-shaft motor 10, the supporting transverse plate 9 is horizontally arranged above the workbench 1, the left-end clamping assembly 4 and the right-end positioning assembly 5 are respectively arranged at two ends of the top of the supporting transverse plate 9, the driving frame 8 is horizontally arranged and fixedly installed at the center of the bottom of the supporting transverse plate 9, the double-shaft motor 10 is horizontally and fixedly installed at one end of the inside of the driving frame 8, two output ends of the double-shaft motor 10 are respectively provided with a rotating first rotating rod 11 extending towards two sides of the outside of the driving frame 8, the driving frame 8 is respectively provided with a first bearing corresponding to each first rotating rod 11 one by one, each first rotating rod 11 can respectively rotatably penetrate through an inner ring of each first bearing and extend towards the outside of the driving frame 8, and the extending end of each first rotating rod 11 is respectively provided with a first moving gear, every first mobile gear 12 is vertical fixed mounting respectively and extends the end at every first rotary rod 11, when polisher 7 polishes the pipe fitting, when the one end of pipe fitting is polished and is ended, starts two first rotary rods 11 and first mobile gear 12 rotation of double-shaft motor 10 drive simultaneously.

One end that biax motor 10 was kept away from to driving frame 8's inside is equipped with second rotary rod 13, second rotary rod 13 and first rotary rod 11 parallel arrangement, the both ends of second rotary rod 13 extend to driving frame 8's outside both sides respectively, driving frame 8 is last to be equipped with the second bearing with the both ends one-to-one of second rotary rod 13 respectively, the both ends of second rotary rod 13 can the pivoted respectively pass the inner circle of every second bearing to driving frame 8's outside extension, two extension ends of second rotary rod 13 are equipped with respectively and are vertical setting at second mobile gear 14, when every first mobile gear 12 removed, every second mobile gear 14 that sets up plays the effect of supplementary removal.

The horizontal track assembly 2 comprises two racks 15 and two guide rods 16, the two racks 15 are respectively arranged at two sides of the top of the supporting transverse plate 9 along the length direction of the supporting transverse plate 9, the two guide rods 16 are arranged between the two racks 15 in parallel and at intervals, each rack 15 is respectively positioned below each first moving wheel and each second moving wheel, each first moving wheel and each second moving wheel are respectively meshed with each rack 15, two ends of each guide rod 16 are respectively fixedly connected with the top of the workbench 1 through fixing blocks, each corner of the bottom of the driving frame 8 is respectively provided with a guide sleeve 17 capable of sliding on each guide rod 16, when the driving frame 8 moves, the arranged guide rods 16 and guide sleeves 17 play a role in guiding and limiting, each first moving gear 12 and each second gear respectively move along the racks 15, and horizontally moving the driving frame 8 and simultaneously driving the pipe fittings clamped on the supporting transverse plate 9 to simultaneously move until the surfaces of the pipe fittings and the working end of the grinding machine 7 are all ground.

Left end clamping assembly 4 includes rotating electrical machines 18, first riser 19 and chuck 20, first riser 19 is vertical fixed mounting and is in the top one end that supports diaphragm 9, rotating electrical machines 18 is horizontal fixed mounting and is on the lateral wall of first riser 19, chuck 20 is the vertical other one side that is located first riser 19, the output of rotating electrical machines 18 can the pivoted one end fixed connection that runs through first riser 19 and chuck 20, add man-hour, place the pipe fitting on supporting diaphragm 9 through manual work or manipulator, and make the one end and the butt joint of chuck 20 of pipe fitting, chuck 20 presss from both sides tight location with the one end of pipe fitting, when right-hand member locating component 5 contradicts the location with the other end of pipe fitting, start rotating electrical machines 18, rotating electrical machines 18 drives chuck 20 rotatory, drive the high-speed rotation of pipe fitting simultaneously.

The right end positioning component 5 comprises a first air cylinder 21, a second vertical plate 22 and a guide post 23, the second vertical plate 22 is vertically and fixedly installed at one end, far away from the first vertical plate 19, of the top of the supporting transverse plate 9, the first air cylinder 21 is horizontally and fixedly installed at one side, far away from the first vertical plate 19, of the first vertical plate 19, the output end of the first air cylinder 21 extends towards the direction of the first vertical plate 19, the axis of the first air cylinder 21 is the same as that of the chuck 20, the guide post 23 is horizontally arranged at the output end of the first air cylinder 21, one end of the guide post 23 is fixedly connected with the output end of the first air cylinder 21, one end, far away from the first air cylinder 21, of the guide post 23 is provided with a cylindrical cutting groove, a third bearing 26 is arranged inside the cylindrical cutting groove, the third bearing 26 is vertically and fixedly installed inside the cylindrical cutting groove, the inner ring of the third bearing 26 is provided with a rotating shaft 24, one end of, the other end of rotation axis 24 extends to chuck 20's direction, rotation axis 24's the end that extends is equipped with the conflict post 25 that can conflict the pipe fitting, conflict post 25's center department is equipped with reference column 27, be equipped with on the second riser 22 and be used for dodging of guide column 23 removal and wear the mouth, press from both sides the one end of pipe fitting tightly the back when chuck 20, start first cylinder 21, first cylinder 21 drives guide column 23, conflict post 25 and reference column 27 remove to the other end of pipe fitting, the inside one end of locating the pipe fitting is inserted to the one end of reference column 27 and is fixed a position, the one end of the one end conflict pipe fitting of conflict post 25, when the pipe fitting is rotatory, rotation axis 24 and the rotation bearing 26 that set up prevent.

The lifting assembly 6 comprises an inverted U-shaped support frame 28 and a second air cylinder 29, the inverted U-shaped support frame is positioned between the first vertical plate 19 and the second vertical plate 22, and the two ends of the bottom between the inverted U-shaped supports are respectively fixedly connected with the top of the workbench 1, the second air cylinder 29 is vertically arranged at the top of the inverted U-shaped support, the output end of the second air cylinder 29 is downwards arranged, the inverted U-shaped support is provided with an avoiding through hole for avoiding the output end of the second air cylinder 29 to move, the output end of the second air cylinder 29 is provided with a mounting plate 30 which is horizontally arranged, the polisher 7 is vertically arranged at the bottom of the mounting plate 30, after the pipe fitting is clamped and positioned by the left end clamping assembly 4 and the right end positioning assembly 5, the second air cylinder 29 is started, the second air cylinder 29 drives the mounting plate 30 to move downwards, and simultaneously drives the sander 7 to move downwards, so that the working end of the sander 7 props against the surface of the pipe fitting to be sanded.

The working principle is as follows: when in processing, a pipe fitting is placed on the supporting transverse plate 9 through a manual or mechanical arm, one end of the pipe fitting is butted with the chuck 20, the chuck 20 clamps and positions one end of the pipe fitting, when the right-end positioning assembly 5 abuts and positions the other end of the pipe fitting, the rotating motor 18 is started, the rotating motor 18 drives the chuck 20 to rotate and simultaneously drives the pipe fitting to rotate at a high speed, when the chuck 20 clamps one end of the pipe fitting, the first air cylinder 21 is started, the first air cylinder 21 drives the guide column 23, the abutting column 25 and the positioning column 27 to move towards the other end of the pipe fitting, one end of the positioning column 27 is inserted into one end of the pipe fitting to be positioned, one end of the abutting column 25 abuts against one end of the pipe fitting, when the pipe fitting rotates, the rotating shaft 24 and the third bearing 26 are arranged to prevent the guide column 23 from rotating, when the pipe fitting is clamped and positioned by the left, the second cylinder 29 drives the mounting plate 30 to move downwards and simultaneously drives the sander 7 to move downwards, so that the working end of the sander 7 abuts against the surface of the pipe fitting to be sanded, when the grinding machine 7 finishes grinding one end of the pipe, the double-shaft motor 10 is started to drive the two first rotating rods 11 and the first moving gear 12 to rotate at the same time, as each first moving gear 12 moves, each second moving gear 14 is provided to play a role of assisting the movement, when the driving frame 8 moves, the guide rod 16 and the guide sleeve 17 are arranged to play a role of guiding and limiting, each first moving gear 12 and each second gear respectively move along the rack 15, so that the driving frame 8 moves horizontally, and simultaneously drives the pipe fittings clamped on the supporting transverse plate 9 to move simultaneously until the surfaces of the pipe fittings and the working end of the polisher 7 are polished completely.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The utility model provides a tubulose part surface grinding device which characterized in that: comprises a worktable (1), a horizontal moving mechanism, a positioning mechanism and a grinding machine (7), horizontal migration mechanism includes horizontal rail set spare (2) and drive assembly (3), horizontal rail set spare (2) are located the top of workstation (1), drive assembly (3) can horizontal migration set up the inside at horizontal rail group price, polisher (7) construct including left end clamping component (4) and right-hand member locating component (5), left end clamping component (4) and right-hand member locating component (5) symmetry and interval set up the top at drive assembly (3), polisher (7) construct including lifting unit (6) and polisher (7), lifting unit (6) are located the top of left end clamping component (4) and right-hand member locating component (5), polisher (7) are vertical setting at the work end of lifting unit (6), the work end of polisher (7) is the level and sets up downwards.

2. The tubular part surface grinding device as claimed in claim 1, wherein: the driving assembly (3) comprises a hollow driving frame (8), a rectangular supporting transverse plate (9) and a double-shaft motor (10), the supporting transverse plate (9) is horizontally arranged above the workbench (1), a left-end clamping assembly (4) and a right-end positioning assembly (5) are respectively arranged at two ends of the top of the supporting transverse plate (9), the driving frame (8) is horizontally arranged and fixedly installed at the center of the bottom of the supporting transverse plate (9), the double-shaft motor (10) is horizontally and fixedly installed at one end of the inside of the driving frame (8), two output ends of the double-shaft motor (10) are respectively provided with a first rotating rod (11) which extends towards two sides outside of the driving frame (8), the driving frame (8) is respectively provided with first bearings which are in one-to-one correspondence with each first rotating rod (11), each first rotating rod (11) can respectively extend towards the outside of the driving frame (8) through the inner ring of each first bearing in a rotating mode, the extending end of each first rotating rod (11) is respectively provided with a first moving gear (12), and each first moving gear (12) is vertically and fixedly arranged at the extending end of each first rotating rod (11).

3. The tubular part surface grinding device as claimed in claim 2, wherein: the one end that biax motor (10) was kept away from to the inside of drive frame (8) is equipped with second rotary rod (13), second rotary rod (13) and first rotary rod (11) parallel arrangement, the both ends of second rotary rod (13) extend to the outside both sides of drive frame (8) respectively, be equipped with the second bearing with the both ends one-to-one of second rotary rod (13) on drive frame (8) respectively, the both ends of second rotary rod (13) can be the pivoted respectively and pass the inner circle of every second bearing to the outside extension of drive frame (8), two extension ends of second rotary rod (13) are equipped with respectively and are vertical setting at second mobile gear (14).

4. The tubular part surface grinding device as claimed in claim 3, wherein: horizontal rail set spare (2) include two rack (15) and two guide bar (16), two rack (15) set up respectively in the top both sides that support diaphragm (9) along the length direction who supports diaphragm (9), two guide bar (16) are parallel and the interval sets up between two rack (15), every rack (15) are located the below of every first removal wheel and every second removal wheel respectively, every first removal wheel and every second removal wheel set up with every rack (15) meshing respectively, the top fixed connection of fixed block and workstation (1) is passed through respectively at the both ends of every guide bar (16), every corner in the bottom of driving frame (8) is equipped with uide bushing (17) that can slide on every guide bar (16) respectively.

5. The tubular part surface grinding device as claimed in claim 4, wherein: left end clamping component (4) include rotating electrical machines (18), first riser (19) and chuck (20), and first riser (19) are vertical fixed mounting in the top one end of supporting diaphragm (9), and rotating electrical machines (18) are horizontal fixed mounting on the lateral wall of first riser (19), and chuck (20) are the vertical other one side that is located first riser (19), and the output of rotating electrical machines (18) can the pivoted run through the one end fixed connection of first riser (19) and chuck (20).

6. The tubular part surface grinding device as claimed in claim 5, wherein: the right end positioning assembly (5) comprises a first air cylinder (21), a second vertical plate (22) and a guide post (23), the second vertical plate (22) is vertically and fixedly installed at one end, far away from the first vertical plate (19), of the top of the supporting transverse plate (9), the first air cylinder (21) is horizontally and fixedly installed at one side, far away from the first vertical plate (19), of the first vertical plate (19), the output end of the first air cylinder (21) extends towards the direction of the first vertical plate (19), the axis of the first air cylinder (21) is the same as that of the chuck (20), the guide post (23) is horizontally arranged at the output end of the first air cylinder (21), one end of the guide post (23) is fixedly connected with the output end of the first air cylinder (21), a cylindrical cutting groove is formed at one end, far away from the first air cylinder (21), a third bearing (26) is arranged inside the cylindrical cutting groove, and the third bearing (26) is vertically and fixedly installed inside the cylindrical cutting groove, the inner ring of the third bearing (26) is provided with a rotating shaft (24), one end of the rotating shaft (24) can be rotatably inserted into the inner ring of the third bearing (26), the other end of the rotating shaft (24) extends towards the chuck (20), the extending end of the rotating shaft (24) is provided with a contact column (25) capable of abutting against a pipe fitting, the center of the contact column (25) is provided with a positioning column (27), and the second vertical plate (22) is provided with an avoiding penetrating opening used for avoiding the movement of the guide column (23).

7. The tubular part surface grinding device as claimed in claim 6, wherein: lifting unit (6) are including falling U type support frame (28) and second cylinder (29), fall U type support and be located between first riser (19) and second riser (22), and fall the bottom both ends between the U type respectively with the top fixed connection of workstation (1), second cylinder (29) are vertical setting at the top of falling U type support, the output of second cylinder (29) sets up downwards, be equipped with on the falling U type support and be used for dodging passing the mouth of second cylinder (29) output removal, the output of second cylinder (29) is equipped with mounting panel (30) that are the level setting, polisher (7) are the bottom of vertical setting at mounting panel (30).