CN120023707B

CN120023707B - Reducing flange inner hole polishing device

Info

Publication number: CN120023707B
Application number: CN202510511903.4A
Authority: CN
Inventors: 闫鹏涛; 闫江涛; 王永栋
Original assignee: Shanxi Fuxingtong Heavy Ring Forging Co ltd
Current assignee: Shanxi Fuxingtong Heavy Ring Forging Co ltd
Priority date: 2025-04-23
Filing date: 2025-04-23
Publication date: 2025-06-24
Anticipated expiration: 2045-04-23
Also published as: CN120023707A

Abstract

The invention relates to the technical field of variable-diameter flange inner hole polishing devices, and discloses a variable-diameter flange inner hole polishing device which comprises a base, wherein a movable seat is arranged on a sliding rail on the top of the base in a sliding manner, a processing table is arranged on the movable seat, a grinding mechanism is arranged in the processing table, a positioning mechanism is arranged on the front side of the base, the grinding mechanism comprises a fixed rod, a deflection driving mechanism, a rotation driving mechanism, a transmission ring table, a deflection disc and an extension mechanism, a grinding head is arranged on the extension mechanism, the rotation driving mechanism drives the transmission ring table and the deflection disc to rotate, the transmission ring table drives the extension mechanism to rotate, the deflection driving mechanism is matched with the rotation driving mechanism and the deflection disc to enable the extension mechanism to be unfolded, the adjustable polishing of the variable-diameter flange inner hole is realized, the structure is matched tightly, and the grinding head can change the rotation radius through the design of the grinding mechanism, so that the grinding head can adapt to an irregular variable-diameter inner hole and continuously polish the variable-diameter inner hole.

Description

Reducing flange inner hole polishing device

Technical Field

The invention relates to the technical field of machining of variable-diameter flanges, in particular to a grinding device for an inner hole of a variable-diameter flange.

Background

In the manufacturing stage of the variable-diameter flange, the processes of casting, forging, welding, cutting and the like are sequentially carried out, in the manufacturing process of the medium-large-sized variable-diameter flange, after casting, forging and cooling are finished, an oxide layer needs to be removed through cutting, the surface of the flange has obvious cutting marks, and the flatness of the surface and an inner hole of the flange needs to be improved through polishing.

The outer surface of the middle-large-sized reducing flange plate is easy to polish, the inner hole of the reducing pipe is troublesome to polish, part of processing factories still adopt a handheld polisher to operate, part of factories adopt industrial robots to replace manual operation, and a polishing device is operated through a mechanical arm to polish.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the difficulty and provide the reducing flange inner hole polishing device.

In order to solve the technical problems, the technical scheme provided by the invention is that the reducing flange inner hole polishing device comprises a base, wherein a sliding rail at the top of the base is provided with a movable seat in a sliding manner, the movable seat is provided with a processing table, a grinding mechanism is arranged in the processing table, and the front side of the base is provided with a positioning mechanism;

The grinding mechanism comprises a fixed rod, a deflection driving mechanism, a rotation driving mechanism, a transmission ring table, a deflection disc and an extension mechanism, wherein the extension mechanism is provided with a grinding head, the rotation driving mechanism drives the transmission ring table and the deflection disc to rotate, the transmission ring table drives the extension mechanism to rotate, and the deflection driving mechanism is matched with the rotation driving mechanism and the deflection disc to enable the extension mechanism to be unfolded;

The extending mechanism comprises a transmission table and a transmission ring, the transmission ring is in running fit with a fixed rod, a gear I is arranged at the end part of the fixed rod, a transmission gear I meshed with the gear I is arranged on the side of the transmission ring in a rotating mode, a positioning plate is hinged to one side of the transmission gear I, a transmission gear II meshed with the transmission gear I is hinged to one end of the positioning plate, one side of the transmission gear II is in running fit with the transmission table, a grinding head is mounted on the bolt on the other side of the transmission gear II, a vortex groove is formed in the front side of the shifting disc, an arc-shaped table matched with the vortex groove is arranged on the rear side of the transmission table, a positioning claw table is arranged at the front end of the transmission ring table, and the transmission table is slidably arranged on the positioning claw table.

The rotary driving mechanism comprises a motor II and a rotary drum, a gear II is arranged at the output end of the motor II, a tooth slot meshed with the gear II is arranged at the rear end of the driving rotary drum, the rotary drum is driven to rotate, a spline table is arranged at the front end of the rotary drum, and a spline groove I and a spline groove II which are matched with the spline table are respectively arranged at the inner sides of the transmission ring table and the deflection disc.

The improved position-changing driving mechanism comprises an air cylinder and a sliding table, wherein the sliding table is arranged inside the processing table in a sliding manner, the output end of the air cylinder is connected with the sliding table, a driving ring table is arranged on the rotating drum, and a groove in running fit with the driving ring table is formed in the inner side of the sliding table.

The improvement is that the front side of the sliding table is provided with a limiting rod, the rear side of the transmission ring table is provided with limiting slots which are in plug-in fit with the limiting rod, and the limiting slots are distributed in an annular mode.

As an improvement, a positioning rotating groove is arranged on the inner side of the deflection disc, and a positioning ring table in rotating fit with the positioning rotating groove is arranged at the front end of the fixing rod.

As an improvement, two sides of the transmission platform are provided with positioning sliding grooves, and the positioning claw platform is provided with a clamping platform which is in sliding fit with the positioning sliding grooves.

The liquid spraying device is characterized in that a liquid outlet table is arranged at the front end of the fixed rod, a liquid spraying mechanism is arranged at the front side of the transmission ring and comprises a liquid distributing table and a plurality of liquid spraying heads, the liquid spraying heads are communicated with the liquid distributing table, the liquid distributing table is fixed on the transmission ring and is in sealing and rotating fit with the liquid outlet table, a clamping table for clamping the liquid spraying heads is arranged on the transmission ring, a liquid storage tank and a pump are arranged in the base, and the liquid storage tank and the pump are connected with the rear end of a central through hole of the fixed rod through a pipeline.

The positioning mechanism comprises a positioning platform, wherein two first positioning tables are hinged to the positioning platform, a first hydraulic cylinder is hinged to the positioning platform, the output end of the first hydraulic cylinder is hinged to the first positioning tables, two groups of first positioning tables and the first hydraulic cylinder are symmetrically arranged, a second hydraulic cylinder is arranged on the positioning platform, a second positioning table is arranged at the output end of the second hydraulic cylinder, and clamping grooves are formed in the first positioning tables and the second positioning tables.

The improvement is that the base is provided with a first motor, an output end of the first motor is provided with a threaded column, and the bottom of the movable seat is provided with a threaded hole matched with the threaded column.

Compared with the prior art, the adjustable grinding device has the beneficial effects that the adjustable grinding of the variable-diameter inner hole of the variable-diameter flange plate is realized, the structural fit is tight, and the grinding head can change the rotation radius through the design of the grinding mechanism, so that the grinding head can adapt to the irregular variable-diameter inner hole and continuously grind the irregular variable-diameter inner hole, and specifically:

1. Through the design of the extension mechanism, the rotation radius of the grinding head can be changed, and through the matching design of gears, the grinding head rotates along with the extension mechanism in the revolution process, so that the rotation speed of the grinding head is higher than that of the rotary drum, and the grinding efficiency and quality can be improved;

2. The rotation driving mechanism, the displacement driving mechanism and the displacement disc are matched, so that the deformation and the extension of the displacement disc driving extension mechanism are realized under the condition that the transmission ring table is restrained and fixed, and the polishing radius can be adjusted;

3. The rotation of the rotary drum is realized through the cooperation of the rotation driving mechanism, the transmission ring table and the shifting disc are driven to synchronously rotate, and the rotation of the extension mechanism and the high-speed polishing of the grinding head are realized;

4. The middle-large variable diameter flange plate is fixed and positioning work is realized through the positioning mechanism, the flange plates are clamped and fixed through the first positioning table, and positioning adjustment is carried out on the flange plate axis through the second positioning table.

Drawings

FIG. 1 is a schematic structural view of a reducing flange inner hole polishing device of the present invention.

Fig. 2 is a schematic structural view of a grinding mechanism of a grinding device for an inner hole of a reducing flange plate.

FIG. 3 is an exploded view of a grinding mechanism of the reducing flange inner hole grinding device of the present invention.

Fig. 4 is a schematic structural view II of a grinding mechanism of the reducing flange inner hole grinding device.

FIG. 5 is a cross-sectional view of a grinding mechanism of the reducing flange inner bore grinding apparatus of the present invention.

Fig. 6 is a schematic structural view of a rotary driving mechanism of a reducing flange inner hole polishing device.

FIG. 7 is a schematic diagram of the drive ring of the reducing flange inner hole polishing device.

FIG. 8 is a cross-sectional view of a variable diameter flange inner hole grinding device displacement disc of the present invention.

FIG. 9 is an exploded view of an extension mechanism of the reducing flange inner hole grinding device of the present invention.

Fig. 10 is a schematic structural view of an extension mechanism of the reducing flange inner hole polishing device of the present invention.

Fig. 11 is a schematic structural view II of an extension mechanism of the reducing flange inner hole polishing device.

FIG. 12 is a schematic structural view of a spray mechanism of a reducing flange inner hole polishing device of the present invention.

FIG. 13 is a schematic structural view of a positioning mechanism of a reducing flange inner hole polishing device of the present invention.

The grinding device comprises a base 1, a grinding mechanism 2, a fixed rod 4, a position-changing driving mechanism 5, a rotary driving mechanism 6, a transmission ring table 7, a position-changing disc 8, an extension mechanism 9, a positioning mechanism 11, a moving seat 12, a processing table 13, a motor 14, a threaded column 31, a gear 32, a liquid outlet table 33, a positioning ring table 41, a cylinder 42, a sliding table 421, a limiting rod 51, a motor II, a gear II, a 52, a rotary drum 521, a tooth socket 522, a driving ring table 523, a spline table 61, a spline groove I, a 62, a limiting slot 63, a positioning claw table 64, a clamping table 71, a spline groove II, 72, a volute groove 73, a positioning rotary groove 81, a transmission table 811, a positioning slot 812, an arc table 82, a transmission ring 821, a clamping table 83, a positioning plate 84, a transmission gear I, a transmission gear 85, a transmission gear II, a 86, a mechanism 861, a liquid separation table 862, a head 87, a spline table 91, a positioning head 92, a positioning slot 92, a positioning cylinder II, a positioning cylinder 93, a hydraulic cylinder 95 and a liquid spraying table 95.

Detailed Description

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

Referring to fig. 1,2 and 3, a reducing flange inner hole polishing device comprises a base 1, wherein a movable seat 11 is slidably arranged at the top of the base 1, a machining table 12 is arranged on the movable seat 11, a grinding mechanism 2 is arranged on the machining table 12, the grinding mechanism 2 comprises a fixed rod 3, a displacement driving mechanism 4, a rotation driving mechanism 5, a transmission ring table 6, a displacement disc 7 and an extension mechanism 8, a grinding head 87 is arranged on the extension mechanism 8, the rotation driving mechanism 5 drives the transmission ring table 6 and the displacement disc 7 to rotate, the transmission ring table 6 drives the extension mechanism 8 to rotate, and the displacement driving mechanism 4 is matched with the rotation driving mechanism 5 and the displacement disc 7 to enable the extension mechanism 8 to be unfolded.

Referring to fig. 7, fig. 8, fig. 9, fig. 10 and fig. 11, the spreading mechanism 8 comprises a transmission table 81 and a transmission ring 82, the transmission ring 82 is in running fit with the fixed rod 3, the end part of the fixed rod 3 is provided with a first gear 31, the side of the transmission ring 82 is provided with a first transmission gear 84 meshed with the first gear 31 in a running mode, one side of the first transmission gear 84 is hinged with a positioning plate 83, one end of the positioning plate 83 is hinged with a second transmission gear 85 meshed with the first transmission gear 84, one side of the second transmission gear 85 is in running fit with the transmission table 81, the other side of the second transmission gear is provided with a grinding head 87 in a bolt installation mode, the front side of the shifting disc 7 is provided with a vortex groove 72, the rear side of the transmission table 81 is provided with an arc-shaped table 812 matched with the vortex groove 72, the inner side of the shifting disc 7 is provided with a positioning rotary groove 73, the front end of the fixed rod 3 is provided with a positioning ring table 33 in running fit with a positioning claw table 63, the transmission table 81 is slidably arranged on the positioning claw table 63, two sides of the transmission table 81 are provided with positioning slide grooves 811, and the positioning claw table 63 is slidably matched with a clamping table 64 with the positioning chute 811.

The extending mechanism 8 works on the principle that the rotating driving mechanism 5 drives the driving ring table 6 and the shifting disc 7 to rotate, the driving ring table 6 is matched with the driving table 81 through the positioning claw table 63, so that the driving table 81 can only move along the radial direction, the volute groove 72 is matched with the arc table 812, under the condition that the shifting disc 7 rotates and the driving ring table 6 does not rotate, the volute groove 72 drives the arc table 812, so that the driving table 81 slides on the positioning claw table 63, under the condition that the shifting disc 7 and the driving ring table 6 synchronously rotate, the volute groove 72 is locked with the positioning claw table 63 to drive the driving table 81, the shifting disc 7 and the driving ring table 6 rotate together, the internal deformation structure is locked, the positioning plate 83 is fixed in an angle, so that the driving table 81 drives the driving ring 82 to rotate, and the driving ring 82 rotates because the first gear 84 is fixed, meanwhile, the first gear 31 and the first gear 84 are meshed and driven, the first gear 84 revolves and rotates, the first gear 84 and the second gear 85 are meshed and driven, so that the first gear 87 and the second gear 85 are meshed and the driving ring 85 rotate, and the first gear 85 and the second gear 85 rotate, and the first gear and the second gear 85 rotate, the first gear and the second gear 85, the rotating ring 85, the rotating and the first gear and the rotating ring 85, the rotating and the rotating mechanism 85, the rotating mechanism and the rotating mechanism.

Referring to fig. 4, 5 and 6, the rotation driving mechanism 5 includes a second motor 51 and a rotary drum 52, the output end of the second motor 51 is provided with a second gear 511, the rear end of the rotary drum 52 is provided with a tooth slot 521 meshed with the second gear 511, the rotary drum 52 is driven to rotate, the front end of the rotary drum 52 is provided with a spline table 523, and the inner sides of the transmission ring table 6 and the shifting disc 7 are respectively provided with a spline groove 61 and a spline groove 71 which are matched with the spline table 523.

The working principle of the rotation driving mechanism 5 is that a motor II 51 drives a gear II 511 to rotate, the gear II 511 is meshed with a tooth groove 521 for transmission, a spline table 523 at the front end of the rotary drum 52 drives a transmission ring table 6 and a deflection disc 7 to rotate by being matched with the spline groove I61 and the spline groove II 71, the rotary drum 52 is driven to move back and forth by a deflection driving mechanism 4, in the moving process, the gear II 511 and the tooth groove 521 always keep a meshed state, a spline table 523 slides in the spline groove I61 and the spline groove II 71, when the extension mechanism 8 needs to be driven to rotate, the spline table 523 is simultaneously matched with the spline groove I61 and the spline groove II 71, when the extension mechanism 8 needs to be driven to be extended, the spline table 523 is separated from the spline groove I61 and is only matched with the spline groove II 71, and the rotary drum 52 drives the deflection disc 7 to rotate at the moment, and the transmission table 81 slides on the positioning claw table 63.

Referring to fig. 3, fig. 5 and fig. 7, the displacement driving mechanism 4 includes a cylinder 41 and a sliding table 42, the sliding table 42 is slidably disposed in the processing table 12, an output end of the cylinder 41 is connected with the sliding table 42, a driving ring table 522 is disposed on the drum 52, a groove rotationally matched with the driving ring table 522 is disposed on an inner side of the sliding table 42, a limit rod 421 is disposed on a front side of the sliding table 42, limit slots 62 which are in plug-in fit with the limit rod 421 are disposed on a rear side of the driving ring table 6, and a plurality of limit slots 62 are distributed in a ring shape.

The working principle of the shift driving mechanism 4 is that during normal polishing, the rotary drum 52 rotates in the sliding table 42, when the polishing radius needs to be changed, the air cylinder 41 pushes the sliding table 42 to slide in the processing table 12, the rotary drum 52 is driven to move back and forth through the cooperation of the driving ring table 522 and the groove on the inner side of the sliding table 42, so that the position of the spline table 523 between the spline groove I61 and the spline groove II 71 is changed, the switching between the rotation and the extension of the extension mechanism 8 is realized, and in order to ensure that the transmission ring table 6 does not rotate when the shift disc 7 rotates, the limiting rod 421 is inserted into the limiting slot 62 in the process that the spline table 523 enters the spline groove I61, and the transmission ring table 6 does not rotate.

Referring to fig. 1 and 12, the front end of the fixed rod 3 is provided with a liquid outlet table 32, the front side of the driving ring 82 is provided with a liquid spraying mechanism 86, the liquid spraying mechanism 86 comprises a liquid distributing table 861 and a plurality of liquid spraying heads 862, the liquid spraying heads 862 are communicated with the liquid distributing table 861, the liquid distributing table 861 is fixed on the driving ring 82 and is in sealing and rotating fit with the liquid outlet table 32, the driving ring 82 is provided with a clamping table 821 for clamping the liquid spraying heads 862, a liquid storage tank and a pump are arranged in the base 1, and the liquid storage tank and the pump are connected with the rear end of the central through hole of the fixed rod 3 through a pipeline.

The liquid spraying mechanism 86 works on the principle that in order to more conveniently spray polishing liquid to a polishing area, the liquid spraying mechanism 86 is arranged at the front end of the fixed rod 3, during polishing, a pump conveys the polishing liquid in a liquid storage tank to a central through hole of the fixed rod 3 through a pipeline until the liquid outlet table 32 is positioned, and during the rotation of the liquid separation table 861 along with the drive ring 82, the polishing liquid is sprayed to an inner hole of the variable-diameter flange through the liquid spraying head 862, so that polishing efficiency and polishing quality are improved.

Referring to fig. 1 and 13, the front side of the base 1 is provided with a positioning mechanism 9, the positioning mechanism 9 includes a positioning platform 91, two positioning platforms one 92 are hinged on the positioning platform 91, a first hydraulic cylinder 94 is hinged on the positioning platform 91, the output end of the first hydraulic cylinder 94 is hinged with the first positioning platform 92, two groups of positioning platforms one 92 and one 94 are symmetrically arranged, a second hydraulic cylinder 95 is arranged on the positioning platform 91, a second positioning platform 96 is arranged at the output end of the second hydraulic cylinder 95, and clamping grooves 93 are formed in the first positioning platform 92 and the second positioning platform 96.

The positioning mechanism 9 works on the principle that a variable-diameter flange plate is transferred to the upper part of the positioning mechanism 9 through conveying equipment such as a crane, then a large-diameter annular table of the variable-diameter flange plate is aligned with a clamping groove 93 on a positioning table I92, after the position is adjusted, a hydraulic cylinder I94 drives the positioning table I92 to rotate, so that the positioning table I92 clamps the large-diameter annular table, then a hydraulic cylinder II 95 lifts a positioning table II 96, the positioning table II 96 pushes a small-diameter annular table to lift and fall, the axial position of the variable-diameter flange plate is adjusted, and the axial line of the variable-diameter flange plate is overlapped with the working axial line of the grinding mechanism.

Referring to fig. 1, a first motor 13 is disposed in the base 1, a threaded column 14 is disposed at an output end of the first motor 13, threaded holes matched with the threaded column 14 are disposed at the bottom of the movable seat 11, sliding grooves matched with sliding rails on the base 1 are disposed at two sides of the bottom of the movable seat 11, the first motor 13 drives the threaded column 14 to rotate, and the threaded column 14 is matched with the threaded holes at the bottom of the movable seat 11 to drive the movable seat 11 to slide on the sliding rails.

In the concrete implementation of the invention, a reducing flange plate is placed on the positioning mechanism 9, the angle is adjusted and then fixed, then the movable seat 11 drives the grinding mechanism 2 to approach the reducing flange plate, the grinding head 87 at the end part of the grinding mechanism 2 stretches into the inner side of the reducing pipe, then the extension mechanism 8 is driven to be unfolded through the displacement driving mechanism 4, the grinding liquid is sprayed on the inner hole of the reducing pipe through the liquid spraying mechanism 86, then the extension mechanism 8 is driven to rotate through the rotation driving mechanism 5 to drive the grinding head 87 to rotate, the inner hole of the reducing pipe is ground, the grinding head 87 rotates while revolving along with the extension mechanism 8 through the gear transmission design of the extension mechanism 8, the rotation speed of the grinding head 87 is far higher than the rotation speed of the rotary drum 52 through the gear ratio, the grinding radius of the grinding head 87 can be changed, a gear engagement transmission can be added between the transmission gear I84 and the transmission gear II 85 according to the requirement, and the rotation speed of the transmission gear II 85 is changed, and the rotation speed of the transmission gear II 85 is increased again.

The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution will not be creatively devised without departing from the gist of the present invention, and the structural manner and the embodiment are all intended to be within the protection scope of the present invention.

Claims

1. A device for grinding the inner hole of a variable diameter flange, comprising a base (1), a movable seat (11) being slidably provided on the top of the base (1), a processing table (12) being provided on the movable seat (11), and a grinding mechanism (2) being provided in the processing table (12), characterized in that:

The grinding mechanism (2) comprises a fixed rod (3), a displacement drive mechanism (4), a rotation drive mechanism (5), a transmission ring platform (6), a displacement disk (7) and an extension mechanism (8); a grinding head (87) is provided on the extension mechanism (8); the rotation drive mechanism (5) drives the transmission ring platform (6) and the displacement disk (7) to rotate; the transmission ring platform (6) drives the extension mechanism (8) to rotate; and the displacement drive mechanism (4) cooperates with the rotation drive mechanism (5) and the displacement disk (7) to expand the extension mechanism (8);

The extension mechanism (8) comprises a transmission platform (81) and a transmission ring (82), wherein the transmission ring (82) is rotatably matched with the fixed rod (3), a gear 1 (31) is provided at the end of the fixed rod (3), a transmission gear 1 (84) meshing with the gear 1 (31) is rotatably provided on the side of the transmission ring (82), a positioning plate (83) is hingedly provided on one side of the transmission gear 1 (84), a transmission gear 2 (85) meshing with the transmission gear 1 (84) is hingedly provided on one end of the positioning plate (83), one side of the transmission gear 2 (85) is rotatably matched with the transmission platform (81), and a grinding head (87) is boltedly mounted on the other side, a volute groove (72) is provided on the front side of the displacement plate (7), an arc-shaped platform (812) aligned with the volute groove (72) is provided on the rear side of the transmission platform (81), a positioning claw platform (63) is provided at the front end of the transmission ring platform (6), and the transmission platform (81) is slidably arranged on the positioning claw platform (63);

The rotation drive mechanism (5) comprises a second motor (51) and a rotating drum (52); a second gear (511) is provided at the output end of the second motor (51); a tooth groove (521) meshing with the second gear (511) is provided at the rear end of the driving rotating drum (52) to drive the rotating drum (52) to rotate; a spline platform (523) is provided at the front end of the rotating drum (52); and a first spline groove (61) and a second spline groove (71) cooperating with the spline platform (523) are respectively provided on the inner sides of the transmission ring platform (6) and the displacement plate (7);

The displacement drive mechanism (4) comprises a cylinder (41) and a slide (42); the slide (42) is slidably arranged inside the processing table (12); the output end of the cylinder (41) is connected to the slide (42); a driving ring table (522) is arranged on the rotating cylinder (52); a groove rotatably matched with the driving ring table (522) is arranged on the inner side of the slide (42); a limit rod (421) is arranged on the front side of the slide (42); a limit slot (62) pluggably matched with the limit rod (421) is arranged on the rear side of the transmission ring table (6); and a plurality of limit slots (62) are distributed in a ring shape.

2. A device for grinding the inner hole of a variable diameter flange according to claim 1, characterized in that: a positioning groove (73) is provided on the inner side of the displacement plate (7), and a positioning ring (33) rotatably matched with the positioning groove (73) is provided at the front end of the fixing rod (3).

3. A variable diameter flange inner hole grinding device according to claim 1, characterized in that: positioning grooves (811) are provided on both sides of the transmission platform (81), and a clamping platform (64) that slidably cooperates with the positioning grooves (811) is provided on the positioning claw platform (63).

4. A device for grinding the inner hole of a variable diameter flange according to claim 1, characterized in that: a liquid outlet platform (32) is provided at the front end of the fixed rod (3), a liquid spraying mechanism (86) is provided on the front side of the transmission ring (82), the liquid spraying mechanism (86) comprises a liquid separation platform (861) and a plurality of liquid spraying heads (862), the liquid spraying heads (862) are connected to the liquid separation platform (861), the liquid separation platform (861) is fixed on the transmission ring (82) and is sealed and rotatably matched with the liquid outlet platform (32), a clamping platform (821) for clamping the liquid spraying head (862) is provided on the transmission ring (82), and a liquid storage tank and a pump are provided in the base (1), which are connected to the rear end interface of the central through hole of the fixed rod (3) through a pipeline.

5. A variable diameter flange inner hole grinding device according to claim 1, characterized in that: a positioning mechanism (9) is provided on the front side of the base (1), the positioning mechanism (9) comprises a positioning platform (91), two positioning platforms (92) are hingedly provided on the positioning platform (91), a hydraulic cylinder (94) is hingedly provided on the positioning platform (91), an output end of the hydraulic cylinder (94) is hingedly connected to the positioning platform (92), two groups of positioning platforms (92) and hydraulic cylinders (94) are symmetrically arranged, a hydraulic cylinder (95) is provided on the positioning platform (91), a positioning platform (96) is provided at the output end of the hydraulic cylinder (95), and both the positioning platform (92) and the positioning platform (96) are provided with a card slot (93).

6. A variable diameter flange inner hole grinding device according to claim 1, characterized in that: a motor 1 (13) is provided on the base (1), a threaded column (14) is provided at the output end of the motor 1 (13), and a threaded hole matching the threaded column (14) is provided at the bottom of the movable seat (11).