Variable-diameter flange plate inner hole grinding device

Abstract

The invention relates to the technical field of variable-diameter flange plate machining, and discloses a variable-diameter flange plate inner hole grinding device which comprises a base, a movable seat is slidably arranged on a sliding rail at the top of the base, a machining table is arranged on the movable seat, a grinding mechanism is arranged in the machining table, and a positioning mechanism is arranged on the front side of the base. The grinding mechanism comprises a fixing rod, a displacement driving mechanism, a rotation driving mechanism, a transmission ring table, a displacement 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 displacement disc to rotate, the transmission ring table drives the extension mechanism to rotate, and the displacement driving mechanism is matched with the rotation driving mechanism and the displacement disc to enable the extension mechanism to be unfolded. According to the device, adjustable grinding of the variable-diameter inner hole of the variable-diameter flange plate is achieved, structural matching is tight, the grinding head can change the rotating radius through the design of the grinding mechanism, and therefore the grinding head can adapt to the irregular variable-diameter inner hole and conduct continuous grinding on the irregular variable-diameter inner hole.

Description

Technical Field

[0001] The invention relates to the technical field of variable diameter flange processing, and in particular to a variable diameter flange inner hole grinding device. Background Art

[0002] During the manufacturing stage, the reducing flange undergoes casting, forging, welding, cutting and other processes. During the production process of medium and large reducing flanges, after casting, forging and cooling, the oxide layer needs to be removed by cutting. At this time, the surface of the flange has obvious cutting marks, and grinding is needed to improve the flatness of the flange surface and inner hole.

[0003] The outer surface grinding of medium and large reducer flanges is relatively simple, while the inner hole grinding of reducer pipes is more troublesome. Some processing plants still use handheld grinders for operation, and some factories use industrial robots instead of manual operation, and use mechanical arms to operate the grinding device for grinding. This method requires positioning and rotating equipment to enable medium and large reducer flanges to achieve axis positioning and rotation functions, and cooperate with mechanical arms to complete the grinding of the inner hole of the reducer pipe. The construction cost is high and cannot be popularized. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a device for grinding the inner hole of a variable diameter flange.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a device for grinding the inner hole of a variable diameter flange, comprising a base, a movable seat is slidably provided on a slide rail on the top of the base, a processing table is provided on the movable seat, a grinding mechanism is provided in the processing table, and a positioning mechanism is provided on the front side of the base; The grinding mechanism includes a fixed rod, a displacement driving mechanism, a rotation driving mechanism, a transmission ring, a displacement disk and an extension mechanism. The extension mechanism is provided with a grinding head. The rotation driving mechanism drives the transmission ring and the displacement disk to rotate, the transmission ring drives the extension mechanism to rotate, and the displacement driving mechanism cooperates with the rotation driving mechanism and the displacement disk to expand the extension mechanism. The extension mechanism includes a transmission platform and a transmission ring. The transmission ring is rotatably matched with the fixed rod. A gear 1 is provided at the end of the fixed rod. A transmission gear 1 meshing with gear 1 is rotatably provided on the side of the transmission ring. A positioning plate is hingedly provided on one side of the transmission gear 1. A transmission gear 2 meshing with the transmission gear 1 is hingedly provided on one end of the positioning plate. A one side of the transmission gear 2 is rotatably matched with the transmission platform, and a grinding head is bolted on the other side. A volute groove is provided on the front side of the displacement disk, and an arc-shaped platform with the volute groove is provided on the rear side of the transmission platform. A positioning claw platform is provided at the front end of the transmission ring platform, and the transmission platform is slidably arranged on the positioning claw platform.

[0006] As an improvement: the rotation drive mechanism includes motor 2 and a rotating drum, the output end of motor 2 is provided with gear 2, the rear end of the driving rotating drum is provided with a tooth groove meshing with gear 2, driving the rotating drum to rotate, the front end of the rotating drum is provided with a spline table, and the inner sides of the transmission ring table and the displacement plate are respectively provided with spline groove 1 and spline groove 2 that cooperate with the spline table.

[0007] As an improvement: the displacement drive mechanism includes a cylinder and a slide, the slide is slidably arranged inside the processing table, the output end of the cylinder is connected to the slide, a driving ring is provided on the fixed rod, and a groove is provided on the inner side of the slide for rotationally cooperating with the driving ring.

[0008] As an improvement: a limit rod is provided on the front side of the slide, and a limit slot which is plugged and matched with the limit rod is provided on the rear side of the transmission ring platform, and a plurality of limit slots are distributed in a ring shape.

[0009] As an improvement: a positioning groove is provided on the inner side of the displacement plate, and a positioning ring platform which is rotatably matched with the positioning groove is provided at the front end of the fixing rod.

[0010] As an improvement: positioning grooves are arranged on both sides of the transmission platform, and a clamping platform which slides with the positioning grooves is arranged on the positioning claw platform.

[0011] As an improvement: a liquid outlet platform is provided at the front end of the fixed rod, and a liquid spraying mechanism is provided on the front side of the transmission ring. The liquid spraying mechanism includes a liquid separation platform and multiple liquid spraying heads. The liquid spraying heads are connected to the liquid separation platform. The liquid separation platform is fixed on the transmission ring and cooperates with the liquid outlet platform in a sealed rotation. A clamping platform for clamping the liquid spraying head is provided on the transmission ring. A liquid storage tank and a pump are provided in the base, which are connected to the rear end interface of the central through hole of the fixed rod through a pipeline.

[0012] As an improvement: the positioning mechanism includes a positioning platform, two positioning platforms 1 are hingedly provided on the positioning platform, a hydraulic cylinder 1 is hingedly provided on the positioning platform, the output end of the hydraulic cylinder 1 is hinged to the positioning platform 1, the two groups of positioning platforms 1 and hydraulic cylinder 1 are symmetrically arranged, a hydraulic cylinder 2 is provided on the positioning platform, a positioning platform 2 is provided at the output end of the hydraulic cylinder 2, and both the positioning platform 1 and the positioning platform 2 are provided with slots.

[0013] As an improvement: the base is provided with a motor 1, the output end of the motor 1 is provided with a threaded column, and the bottom of the movable seat is provided with a threaded hole matching with the threaded column.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present device realizes adjustable grinding of the variable diameter inner hole of the variable diameter flange, the structure is tightly matched, and the grinding head can change the rotation radius through the grinding mechanism design, so that the grinding head can adapt to the irregular variable diameter inner hole and grind it continuously. Specifically: 1. Through the design of the extension mechanism, the rotation radius of the grinding head can be changed. Through the gear matching design, the grinding head can rotate with the extension mechanism during the revolution, so that the rotation speed of the grinding head is greater than the rotation speed of the drum, which can improve the grinding efficiency and quality; 2. Through the cooperation of the rotating drive mechanism, the displacement drive mechanism and the displacement disk, the transmission ring table is restricted and immobilized, and the displacement disk drives the extension mechanism to deform and stretch, so that the grinding radius can be adjusted; 3. Through the cooperation of the rotating drive mechanism, the transmission ring and the displacement plate, the rotation of the drum drives the transmission ring and the displacement plate to rotate synchronously, thus realizing the rotation of the extension mechanism and the high-speed grinding of the grinding head; 4. The fixing and positioning of medium and large variable diameter flanges are realized through the positioning mechanism. A pair of flanges are clamped and fixed through the positioning platform, and the axis of the flanges is positioned and adjusted through the second positioning platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The invention discloses a structural schematic diagram of a device for grinding the inner hole of a variable diameter flange.

[0016] Figure 2 This is a schematic diagram of the structure of the grinding mechanism of a variable diameter flange inner hole grinding device of the present invention. Figure 1 .

[0017] Figure 3 It is an exploded view of a grinding mechanism of a variable diameter flange inner hole grinding device of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the grinding mechanism of a variable diameter flange inner hole grinding device of the present invention. Figure 2 .

[0019] Figure 5 The invention discloses a cross-sectional view of a grinding mechanism of a variable diameter flange inner hole grinding device.

[0020] Figure 6 The present invention is a schematic structural diagram of a rotating drive mechanism of a variable diameter flange inner hole grinding device.

[0021] Figure 7 The invention discloses a structural schematic diagram of a transmission ring table of a variable diameter flange inner hole grinding device.

[0022] Figure 8 The invention discloses a cross-sectional view of a displacement plate of a variable diameter flange inner hole grinding device.

[0023] Fig. 9 It is an exploded view of an extension mechanism of a variable diameter flange inner hole grinding device of the present invention.

[0024] Fig.10This is a schematic diagram of the structure of the extension mechanism of the variable diameter flange inner hole grinding device of the present invention. Figure 1 .

[0025] Fig.11 This is a schematic diagram of the structure of the extension mechanism of the variable diameter flange inner hole grinding device of the present invention. Figure 2 .

[0026] Fig.12 The present invention is a schematic structural diagram of a liquid spraying mechanism of a variable diameter flange inner hole grinding device.

[0027] Fig.13 The present invention is a schematic structural diagram of a positioning mechanism of a variable diameter flange inner hole grinding device.

[0028] As shown in the figure: 1. Base; 2. Grinding mechanism; 3. Fixed rod; 4. Displacement drive mechanism; 5. Rotation drive mechanism; 6. Transmission ring; 7. Displacement disk; 8. Extension mechanism; 9. Positioning mechanism; 11. Moving seat; 12. Processing table; 13. Motor 1; 14. Threaded column; 31. Gear 1; 32. Liquid outlet table; 33. Positioning ring; 41. Cylinder; 42. Slide; 421. Limit rod; 51. Motor 2; 511. Gear 2; 52. Rotating drum; 521. Tooth groove; 522. Drive ring; 523. Spline table; 61. Spline Slot 1; 62, limit slot; 63, positioning claw platform; 64, clamping platform; 71, spline groove 2; 72, volute groove; 73, positioning rotating groove; 81, transmission platform; 811, positioning slide groove; 812, arc platform; 82, transmission ring; 821, clamping platform; 83, positioning plate; 84, transmission gear 1; 85, transmission gear 2; 86, spray mechanism; 861, liquid separation platform; 862, spray head; 87, grinding head; 91, positioning platform; 92, positioning platform 1; 93, slot; 94, hydraulic cylinder 1; 95, hydraulic cylinder 2; 96, positioning platform 2. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] Combined with Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a device for grinding the inner hole of a variable diameter flange comprises a base 1, a movable seat 11 is slidably provided on the top of the base 1, a processing table 12 is provided on the movable seat 11, a grinding mechanism 2 is provided on the processing 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 disk 7 and an extension mechanism 8, a grinding head 87 is provided on the extension mechanism 8, the rotation driving mechanism 5 drives the transmission ring table 6 and the displacement disk 7 to rotate, the transmission ring table 6 drives the extension mechanism 8 to rotate, and the displacement driving mechanism 4 cooperates with the rotation driving mechanism 5 and the displacement disk 7 to expand the extension mechanism 8.

[0031] Combined with Figure 7 , Attachment Figure 8 , Attachment Fig. 9 , Attachment Fig.10 and attached Fig.11 As shown, the extension mechanism 8 includes a transmission platform 81 and a transmission ring 82. The transmission ring 82 is rotatably matched with the fixed rod 3. The end of the fixed rod 3 is provided with a gear 31. The side of the transmission ring 82 is rotatably provided with a transmission gear 84 meshing with the gear 31. A positioning plate 83 is hingedly provided on one side of the transmission gear 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 the other side is bolted to install the grinding head 8 7, a vortex groove 72 is provided on the front side of the displacement plate 7, an arc-shaped platform 812 which is aligned with the vortex groove 72 is provided on the rear side of the transmission platform 81, a positioning groove 73 is provided on the inner side of the displacement plate 7, a positioning ring platform 33 which is rotatably matched with the positioning groove 73 is provided on the front end of the fixing rod 3, a positioning claw platform 63 is provided on the front end of the transmission ring platform 6, the transmission platform 81 is slidably arranged on the positioning claw platform 63, positioning grooves 811 are provided on both sides of the transmission platform 81, and a clamping platform 64 which is slidably matched with the positioning grooves 811 is provided on the positioning claw platform 63.

[0032] The working principle of the extension mechanism 8 is as follows: the rotation drive mechanism 5 drives the transmission ring 6 and the displacement disk 7 to rotate. The transmission ring 6 cooperates with the transmission platform 81 through the positioning claw platform 63, so that the transmission platform 81 can only move in the radial direction. The volute groove 72 cooperates with the arc platform 812. When the displacement disk 7 rotates and the transmission ring 6 does not rotate, the volute groove 72 drives the arc platform 812 to make the transmission platform 81 slide on the positioning claw platform 63. When the displacement disk 7 and the transmission ring 6 rotate synchronously, the volute groove 72 and the positioning claw platform 63 lock the transmission platform 81, so that the displacement disk 7 and the transmission ring 6 rotate together, driving the extension mechanism 8 to rotate and the internal deformation structure is locked. Due to the transmission platform 81 The position is determined, and the angle of the positioning plate 83 is fixed, so that the transmission platform 81 drives the transmission ring 82 to rotate. Since the gear 1 31 is fixed, the rotation of the transmission ring 82 will drive the transmission gear 1 84 to revolve. At the same time, the gear 1 31 is meshed with the transmission gear 1 84 for transmission, so that the transmission gear 1 84 revolves and rotates at the same time. The transmission gear 1 84 is meshed with the transmission gear 2 85 for transmission, so that the transmission gear 2 85 drives the grinding head 87 to rotate, thereby grinding the inner hole of the variable diameter flange. When the position of the transmission platform 81 changes, due to the hinged relationship of the positioning plate 83, the transmission gear 1 84 and the transmission gear 2 85 are always kept in meshing state, and the transmission ring 82 is rotated to a certain extent.

[0033] Combined with Figure 4 , Attachment Figure 5 and attached Figure 6As shown, the rotation driving mechanism 5 includes a second motor 51 and a rotating cylinder 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 cylinder 52 to drive the rotating cylinder 52 to rotate. A spline platform 523 is provided at the front end of the rotating cylinder 52. A first spline groove 61 and a second spline groove 71 cooperating with the spline platform 523 are respectively provided inside the transmission ring platform 6 and the displacement plate 7.

[0034] Working principle of the rotation driving mechanism 5: The second motor 51 drives the second gear 511 to rotate. Through the meshing transmission between the second gear 511 and the tooth groove 521, the rotating cylinder 52 is driven to rotate. The spline platform 523 at the front end of the rotating cylinder 52 drives the transmission ring platform 6 and the displacement plate 7 to rotate through cooperation with the first spline groove 61 and the second spline groove 71. The rotating cylinder 52 is driven to move forward and backward by the displacement driving mechanism 4. During the movement, the second gear 511 and the tooth groove 521 always remain in the meshing state. The spline platform 523 slides in the first spline groove 61 and the second spline groove 71. When it is necessary to drive the extension mechanism 8 to rotate, the spline platform 523 cooperates with the first spline groove 61 and the second spline groove 71 at the same time. When it is necessary to drive the extension mechanism 8 to unfold, the spline platform 523 disengages from the first spline groove 61 and only cooperates with the second spline groove 71. At this time, the rotating cylinder 52 drives the displacement plate 7 to rotate, so that the transmission platform 81 slides on the positioning claw platform 63.

[0035] Combined with attached Figure 3 、attached Figure 5 and attached Figure 7 As shown, the displacement driving mechanism 4 includes a cylinder 41 and a sliding table 42. The sliding table 42 is slidably arranged inside the processing table 12. The output end of the cylinder 41 is connected to the sliding table 42. A driving ring platform 522 is provided on the fixed rod 3. A groove rotatably cooperating with the driving ring platform 522 is provided inside the sliding table 42. A limiting rod 421 is provided on the front side of the sliding table 42. A limiting slot 62 inserted and cooperating with the limiting rod 421 is provided at the rear side of the transmission ring platform 6. A plurality of limiting slots 62 are annularly distributed.

[0036] Working principle of the displacement driving mechanism 4: During normal grinding work, the rotating cylinder 52 rotates inside the sliding table 42. When it is necessary to change the grinding radius, the cylinder 41 pushes the sliding table 42 to slide inside the processing table 12. Through the cooperation between the driving ring platform 522 and the groove inside the sliding table 42, the rotating cylinder 52 is driven to move forward and backward, realizing the position change of the spline platform 523 between the first spline groove 61 and the second spline groove 71, so as to realize the switching between the rotation and extension of the extension mechanism 8. In order to ensure that the transmission ring platform 6 does not rotate when the displacement plate 7 rotates, when the spline platform 523 enters the first spline groove 61, the limiting rod 421 is inserted into the limiting slot 62 to prevent the transmission ring platform 6 from rotating.

[0037] Combined with attached Figure 1 、attached Fig.12As shown, a liquid outlet platform 32 is provided at the front end of the fixed rod 3, and a liquid spraying mechanism 86 is provided at the front side of the transmission ring 82. The liquid spraying mechanism 86 includes 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. 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.

[0038] Working principle of the spray mechanism 86: In order to more conveniently spray the polishing liquid onto the polishing area, a spray mechanism 86 is set at the front end of the fixed rod 3. During polishing, the pump transports the polishing liquid in the liquid storage tank through the pipeline to the central through hole of the fixed rod 3 until it reaches the position of the liquid outlet platform 32. When the liquid distribution platform 861 rotates with the transmission ring 82, the polishing liquid is sprayed onto the inner hole of the reducing flange through the spray head 862, thereby improving the polishing efficiency and quality.

[0039] Combined with Figure 1 and attached Fig.13 As shown, a positioning mechanism 9 is provided on the front side of the base 1, and the positioning mechanism 9 includes a positioning platform 91, on which two positioning platforms 92 are hingedly provided, and on which a hydraulic cylinder 94 is hingedly provided, and an output end of the hydraulic cylinder 94 is hingedly provided to the positioning platform 92, and two groups of positioning platforms 92 and hydraulic cylinders 94 are symmetrically arranged, and a hydraulic cylinder 95 is provided on the positioning platform 91, and a positioning platform 96 is provided at the output end of the hydraulic cylinder 95, and both the positioning platforms 92 and 96 are provided with card slots 93.

[0040] Working principle of positioning mechanism 9: The reducing flange is moved to the top of positioning mechanism 9 by means of transportation equipment such as a crane, and then the large diameter ring stage of the reducing flange is aligned with the slot 93 on positioning table 1 92. After adjusting the position, hydraulic cylinder 1 94 drives positioning table 1 92 to rotate, so that positioning table 1 92 clamps the large diameter ring stage, and then hydraulic cylinder 2 95 lifts positioning table 2 96, so that positioning table 2 96 pushes the small diameter ring stage up and down, and adjusts the position of the axis of the reducing flange so that the axis of the reducing flange coincides with the working axis of the grinding mechanism.

[0041] Combined with Figure 1 As shown, the base 1 is provided with a motor 13, the output end of the motor 13 is provided with a threaded column 14, the bottom of the moving seat 11 is provided with a threaded hole that cooperates with the threaded column 14, and the two sides of the bottom of the moving seat 11 are provided with sliding grooves that slide with the slide rail on the base 1. The motor 13 drives the threaded column 14 to rotate, and the threaded column 14 cooperates with the threaded hole at the bottom of the moving seat 11 to drive the moving seat 11 to slide on the slide rail.

[0042] When the present invention is implemented, the reducing flange is placed on the positioning mechanism 9, the angle is adjusted and then fixed, and then the moving seat 11 drives the grinding mechanism 2 to approach the reducing flange, and the grinding head 87 at the end of the grinding mechanism 2 extends into the inner side of the reducing tube, and then the displacement driving mechanism 4 drives the extension mechanism 8 to expand, and the grinding liquid is sprayed onto the inner hole of the reducing tube through the spraying mechanism 86 by the pump, and then the extension mechanism 8 is driven to rotate by the rotating driving mechanism 5, driving the grinding head 87 to rotate, and grinding the inner hole of the reducing tube. Through the gear transmission design of the extension mechanism 8, the grinding head 87 rotates while revolving with the extension mechanism 8, and through the gear ratio, the rotation speed of the grinding head 87 is much greater than the rotation speed of the rotating drum 52, and the grinding radius of the grinding head 87 can be changed. According to needs, a gear meshing transmission can be added between the transmission gear 1 84 and the transmission gear 2 85 to change the rotation direction of the transmission gear 2 85 and increase the rotation speed of the transmission gear 2 85 again.

[0043] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall 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).

2. A variable diameter flange inner hole polishing device according to claim 1, characterized in that: 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).

3. The device for grinding inner hole of a variable diameter flange according to claim 2, characterized in that: The displacement drive mechanism (4) comprises a cylinder (41) and a slide table (42). The slide table (42) is slidably arranged inside the processing table (12). The output end of the cylinder (41) is connected to the slide table (42). A driving ring table (522) is provided on the fixed rod (3). A groove is provided on the inner side of the slide table (42) for rotationally cooperating with the driving ring table (522).

4. The device for grinding inner hole of a variable diameter flange according to claim 3, characterized in that: A limiting rod (421) is provided on the front side of the slide table (42), and a limiting slot (62) pluggably engaged with the limiting rod (421) is provided on the rear side of the transmission ring table (6), wherein the plurality of limiting slots (62) are distributed in a ring shape.

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

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

7. The device for grinding 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), and a liquid spraying mechanism (86) is provided at 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 in sealing rotational cooperation with the liquid outlet platform (32). A clamping platform (821) for clamping the liquid spraying heads (862) is provided on the transmission ring (82). 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.

8. The device for grinding inner hole of a variable diameter flange 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) comprising a positioning platform (91), two positioning platforms (92) being hingedly provided on the positioning platform (91), a hydraulic cylinder (94) being hingedly provided on the positioning platform (91), an output end of the hydraulic cylinder (94) being hingedly connected to the positioning platform (92), two sets of positioning platforms (92) and hydraulic cylinders (94) being symmetrically arranged, a hydraulic cylinder (95) being provided on the positioning platform (91), a positioning platform (96) being provided at the output end of the hydraulic cylinder (95), and a clamping slot (93) being provided on both the positioning platform (92) and the positioning platform (96).

9. The device for grinding inner hole of a variable diameter flange according to claim 1, characterized in that: The base (1) is provided with a motor 1 (13), the output end of the motor 1 (13) is provided with a threaded column (14), and the bottom of the movable seat (11) is provided with a threaded hole that matches the threaded column (14).

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