A contour-following track-type internal hole polishing machine

Abstract

This invention relates to a contour-following track-type internal hole polishing machine, belonging to the field of precision machining technology, and solves the problem of internal polishing of complex-shaped pipes. The contour-following track-type internal hole polishing machine includes a contour-following track and a polishing device capable of running along the track. The polishing device includes a rotating mechanism capable of rotating around the track, and the rotating mechanism is equipped with multiple strip-shaped springs. One end of each strip-shaped spring is fixed to the rotating mechanism, and the other end is equipped with sandpaper. This achieves internal polishing of complex-shaped pipes.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology, and in particular to a contour-following track-type internal hole polishing machine. Background Technology

[0002] Nuclear power pipeline products are high value-added products. Due to reliability requirements, the fewer welding points in the pipeline, the better. Therefore, the inner wall of the pipeline needs to be polished.

[0003] In existing technologies, polishing is usually done manually. However, as the shape of pipes becomes more and more complex, the polishing and cleaning work inside the pipes becomes more and more difficult. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a contour-following track-type internal hole polishing machine to solve the internal polishing problem of complex-shaped pipes.

[0005] On one hand, embodiments of the present invention provide a contour-following track-type internal hole polishing machine, the contour-following track-type internal hole polishing machine includes a track and a polishing device capable of running along the track. The polishing device includes a rotating mechanism capable of rotating around the track. The rotating mechanism is provided with a plurality of strip-shaped springs. One end of each strip-shaped spring is fixed to the rotating mechanism, and the other end is provided with sandpaper.

[0006] Preferably, the polishing device further includes a frame, a frame drive device, and a rotation mechanism drive device. The rotation mechanism, the frame drive device, and the rotation mechanism drive device are all mounted on the frame. The rotation mechanism drive device is connected to the rotation mechanism, enabling the rotation mechanism to rotate around the track.

[0007] Preferably, the frame includes a front frame and a rear frame arranged sequentially front to back. The rotating mechanism and the rotating mechanism drive device are mounted on the front frame, and the frame drive device is mounted on the rear frame. The track passes through the front frame and the rear frame. The front frame and the rear frame are connected on one side of the track by a connecting shaft. The front frame and the rear frame are rotatable around the connecting shaft. The front frame and the rear frame are connected on the other side of the track by a spring. The rear frame is driven by the track.

[0008] Preferably, along the direction of movement of the polishing device, on the side where the connecting shaft is provided, the front end of the front frame is provided with a front clamping bearing, and the rear end of the rear frame is provided with a rear clamping bearing; on the side where the spring is provided, the rear end of the front frame is provided with an intermediate clamping bearing; the front clamping bearing, the rear clamping bearing, and the intermediate clamping bearing press against the track.

[0009] Preferably, the rotating mechanism includes a turntable sleeved on the front frame and an adjusting plate sleeved on the turntable, the turntable and the adjusting plate are fixedly connected, and the turntable and the front frame are connected by a turntable bearing.

[0010] Preferably, the front end and rear end of the front frame are respectively provided with a front pressure cover and a rear pressure cover for fixing the turntable bearing.

[0011] Preferably, an internal gear ring is provided on one side of the turntable, and a gear is provided on the rotating mechanism drive device, the gear meshing with the internal gear ring.

[0012] Preferably, grooves extending along the track direction are provided on both sides of the track, and a drive chain is provided in the groove on the side of the track where the connecting shaft is provided. The frame drive device acts on the drive chain to make the frame run on the track.

[0013] Preferably, the frame drive device includes a servo motor and a reducer, the servo motor and the reducer are fixedly connected, a rear axle is provided at the rear end of the rear frame, the rear axle is connected to the output shaft of the reducer, a rear clamping bearing and a sprocket are sleeved on the rear axle, and the sprocket meshes with the drive chain.

[0014] Preferably, the drive chain is fixed in the groove by a chain clamp and clamp screws.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0016] 1. The polishing device in the contour track-type internal hole polishing machine of the present invention moves along the track trajectory, while the rotating mechanism controls the sandpaper to rotate at high speed. The sandpaper is pressed onto the inner wall of the pipe by the spring sheet, thereby realizing the internal hole polishing of the pipe. It is not affected by the shape of the pipe and solves the problem of internal polishing of complex shaped pipes.

[0017] 2. In this invention, the front frame and the rear frame are connected on both sides by a connecting shaft and a spring, respectively. The front clamping bearing, the rear clamping bearing and the middle clamping bearing form a three-point tracking running mechanism. The spring can provide sufficient rebound force between the front frame and the rear frame. This rebound force causes the front clamping bearing, the rear clamping bearing and the middle clamping bearing to press on both sides of the track, so that the frame has the function of changing the running trajectory as the shape of the contoured track changes.

[0018] 3. This invention can be equipped with multiple main drive motors to increase output power and improve the polishing efficiency of the inner wall.

[0019] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0020] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0021] Figure 1 This is a front view assembly diagram of the contour-following track-type internal hole polishing machine of the present invention;

[0022] Figure 2 This is a rear view assembly schematic diagram of the contour-following track-type internal hole polishing machine of the present invention;

[0023] Figure 3 This is a cross-sectional view along the track plane of the contour track-type internal hole polishing machine of the present invention;

[0024] Figure 4 This is a cross-sectional view of the transmission assembly of the main drive motor of the present invention.

[0025] Figure label:

[0026] 1-Servo motor; 2-Reducer; 3-Sprocket; 4-Rear clamping bearing; 5-Rear frame; 51-Upper structural unit; 52-Lower structural unit; 6-Turntable; 7-Motor mounting base; 8-Adjusting plate; 9-Front clamping bearing; 10-Front pin; 11-Drive chain; 12-Chain pressure block; 13-Pressure block screw; 14-Railway; 1401-Groove; 1402-Partition; 15-Spring fixing screw; 16-Sandpaper; 17-Spring; 18-Main drive motor; 19-Spring pin seat; 20-Front spring pin; 21-Spring; 22-Rear spring pin; 23-Rear wheel axle; 24-Connecting shaft; 25-Front frame; 26-Front cover; 27-Turntable bearing; 28-Internal gear ring; 29-Intermediate clamping bearing; 30-Intermediate pin; 31-Gear; 32-Rear cover. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0028] This invention provides a contour-following track-type internal hole polishing machine, such as... Figure 1-4As shown, the contour track-type internal hole polishing machine includes a track 14 and a polishing device disposed on the track 14 and capable of running along the track 14. The polishing device includes a rotating mechanism capable of rotating around the track. The rotating mechanism is provided with a plurality of strip-shaped springs 17. One end of each strip-shaped spring is fixed to the rotating mechanism by a spring fixing screw 15, and the other end is provided with sandpaper 16.

[0029] It should be noted that the extended shape of track 14 is the same as the extended shape of the pipe, and the shape of the pipe includes, but is not limited to, a combination of arc segments and straight segments. Unless otherwise specified, "front" and "rear" in this invention refer to "front" and "rear" along the running direction of the polishing device.

[0030] In practice, the contour track-type internal hole polishing machine of the present invention is placed inside the pipe, and the polishing device is placed at one end of the pipe. The polishing device runs along the track 14 to the other end of the pipe. During the operation of the polishing device, the rotating mechanism rotates, and the strip-shaped spring sheet 17 presses the sandpaper 16 onto the inner wall of the pipe and drives the sandpaper 16 to rotate, thereby achieving the polishing of the complex inner wall of the pipe, removing the oxide layer on the inner wall surface, and improving the smoothness of the inner surface.

[0031] It should be noted that, in order to improve polishing efficiency and convenience, two polishing devices in opposite directions can also be set on the track 14. For pipes with curved and straight sections, the extension direction of the track 14 is the same as the shape of the pipe. One polishing device is located at one end of the pipe, and the other polishing device is located at the other end of the pipe. The two polishing devices move towards the curved section at the same time and perform polishing.

[0032] Compared with the prior art, the polishing device in the contour track-type internal hole polishing machine provided by the present invention can move along the trajectory of track 14, while the rotating mechanism controls the sandpaper 16 to rotate at high speed. The sandpaper 16 is pressed onto the inner wall of the pipe by the spring piece 17, thereby realizing the internal hole polishing of the pipe. It is not affected by the shape of the pipe and solves the problem of internal polishing of pipes with complex shapes.

[0033] It should be noted that the plurality of strip-shaped spring pieces 17 are evenly and diffusely arranged on the rotating mechanism, and the strip-shaped spring pieces 17 form a certain angle with the tangent of the end of the sandpaper 16 that contacts the inner wall of the pipe, for example, 15-60 degrees.

[0034] Specifically, the polishing apparatus further includes a frame, a frame drive unit, and a rotation mechanism drive unit. The rotation mechanism, frame drive unit, and rotation mechanism drive unit are all mounted on the frame. The rotation mechanism drive unit is connected to the rotation mechanism, enabling the rotation mechanism to rotate around the track 14. The frame drive unit drives the frame to move, thereby allowing the polishing apparatus to run on the track 14; the rotation mechanism drive unit drives and controls the rotation of the rotation mechanism.

[0035] It should be noted that the rotation direction of the rotating mechanism is perpendicular to the running direction of the polishing device.

[0036] Furthermore, the frame includes a front frame 25 and a rear frame 5 arranged sequentially front and rear. The rotating mechanism and its driving device are mounted on the front frame 25, and the frame driving device is mounted on the rear frame 5. The track 14 passes through the front frame 25 and the rear frame 5. The front frame 25 and the rear frame 5 are connected on one side of the track 14 via a connecting shaft 24, allowing them to rotate around the connecting shaft 24. The front frame 25 and the rear frame 5 are connected on the other side of the track 14 via a spring 21, and the rear frame 5 is connected to the track 14 via a transmission link. The front frame 25 and the rear frame 5 are connected on both sides via connecting shafts 24 and springs 21, respectively, enabling the polishing device to turn at different angles.

[0037] In order for the polishing device to run stably along the track 14, preferably, along the direction of movement of the polishing device, on the side where the connecting shaft 24 is provided, the front end of the front frame 25 is provided with a front clamping bearing 9, and the rear end of the rear frame 5 is provided with a rear clamping bearing 4; on the side where the spring 21 is provided, the rear end of the front frame 25 is provided with an intermediate clamping bearing 29; the front clamping bearing 9, the rear clamping bearing 4 and the intermediate clamping bearing 29 press against the track 14.

[0038] It is understood that the front clamping bearing 9, the rear clamping bearing 4, and the middle clamping bearing 29 form a three-point tracking running mechanism that can adapt to the contour track. The front frame 25 and the rear frame 5 are connected on both sides by a connecting shaft 24 and a spring 21, respectively. The spring 21 can provide sufficient rebound force between the front frame 25 and the rear frame 5. This rebound force causes the front clamping bearing 9, the rear clamping bearing 4, and the middle clamping bearing 29 to press on both sides of the track 14, so that the frame has the function of changing its running trajectory as the shape of the contour track changes.

[0039] To further promote the stable operation of the polishing device, the front clamping bearing 9, the rear clamping bearing 4, and the intermediate clamping bearing 29 are respectively provided in two opposite positions.

[0040] In this invention, the frame drive device includes a servo motor 1 and a reducer 2, which are fixedly connected. A rear axle 23 is provided at the rear end of the rear frame 5, and the rear axle 23 is connected to the output shaft of the reducer 2. A rear clamping bearing 4 and a sprocket 3 are sleeved on the rear axle 23. The walking speed and position of the polishing device can be controlled by the servo motor 1 and the reducer 2.

[0041] Specifically, the main body of the front frame 25 is a hollow cylinder, and the track 14 passes through the hollow part. The front end of the front frame 25 is provided with two front bosses, one above the other. The two bosses are located on the upper and lower sides of the track 14, respectively. A front pin 10 is vertically provided on the side of each front boss that is close to the track 14. The front pin 10 is located on the side where the connecting shaft 24 is provided. Two front clamping bearings 9 are respectively sleeved on the front pin 10.

[0042] The front frame 25 has two rear protrusions arranged parallel to each other on the rear end of the side where the spring 21 is located. The two rear protrusions are located on the upper and lower sides of the track 14, respectively. A middle pin 30 is vertically arranged on the side of each rear protrusion closest to the track 14, and two intermediate clamping bearings 29 are respectively sleeved on the middle pin 30.

[0043] The rear frame 5 includes an upper structural unit 51 and a lower structural unit 52 arranged parallel to each other and forming an L-shape. The upper structural unit 51 and the lower structural unit 52 are connected by a connecting column, and the track 14 passes between the upper structural unit 51 and the lower structural unit 52. The openings of the L-shaped rear frame face forward and towards the side where the spring 21 is located. On the side where the spring 21 is located, spring pin seats 19 are respectively provided at the rear end of the front frame 25 and on the upper and lower sides of the track 14. A front spring pin 20 is provided between the two spring pin seats 19. A rear spring pin 22 is provided between the upper and lower structural units of the rear frame 5, connecting the upper and lower structural units. One end of the spring 21 is connected to the front spring pin 20 (e.g., sleeved), and the other end is connected to the rear spring pin 22 (e.g., sleeved). Exemplarily, multiple springs 21 can be arranged in parallel.

[0044] On the side where the connecting shaft 24 is located, rear wheel axles 23 are vertically arranged at the rear ends of the upper structural unit 51 and the lower structural unit 52 of the rear frame 5, respectively. The two rear clamping bearings 4 are respectively sleeved on the rear wheel axles 23 between the upper structural unit 51 and the lower structural unit 52. The rear wheel axle 23 located in the upper structural unit 51 passes through the upper structural unit 51 and is connected to the output shaft of the reducer 2, and the sprocket 3 is also sleeved on the rear wheel axle 23.

[0045] Typically, the output shaft of reducer 2 has a hollow structure, into which the rear wheel axle 23 can be inserted. The servo motor 1 and reducer 2 drive the rear wheel axle 23, thereby driving the entire frame forward.

[0046] In this invention, the rotating mechanism includes a turntable 6 sleeved on the front frame 25 and an adjusting plate 8 sleeved on the turntable 6. The turntable 6 and the adjusting plate 8 are fixedly connected, and the turntable 6 and the front frame 25 are connected by a turntable bearing 27. One end of the spring piece 17 is fixed to the adjusting plate 8, and the other end is connected to sandpaper 16. The rotation of the turntable 6 drives the adjusting plate 8 to rotate, thereby achieving inner wall polishing.

[0047] For example, the front frame 25 has a circular stop on the surface that contacts the turntable bearing 27 for mounting the turntable bearing 27.

[0048] The turntable 6 can have an L-shaped cross-section, and the adjusting disc 8 is fitted onto one side of the L-shaped turntable. An internal gear ring 28 is provided on the outer side of the other side of the L-shaped turntable, and a gear 31 is provided on the rotating mechanism drive device, which meshes with the internal gear ring 28. The internal gear ring 28 is fixedly connected to the turntable 6.

[0049] Specifically, the rotating mechanism drive is connected to gear 31 via a shaft, and the outer diameter of gear 31 is smaller than the inner diameter of the internal gear ring 28. The rotating mechanism drive drives the internal gear ring 28 to rotate via gear 31, thereby driving the turntable 6 and the adjusting plate 8 to rotate.

[0050] The turntable 6 and the adjusting plate 8 can be connected by screws, and the appropriate adjusting plate 8 can be replaced according to the inner diameter of the pipe.

[0051] For example, the rotary mechanism drive device can be a main drive motor 18, and the rotary mechanism drive device can include multiple main drive motors 18, each main drive motor 18 corresponding to a gear 31, and each gear 31 meshing with an internal gear ring 28. By setting multiple main drive motors, the output power can be increased and the inner wall polishing efficiency can be improved.

[0052] For example, the rotating mechanism drive device includes four main drive motors 18, two of which are arranged side by side on the upper side of the track 14, and the other two are arranged side by side on the lower side of the track 14.

[0053] In order to fix the turntable bearing 27, the front end and the rear end of the front frame 25 are respectively provided with a front pressure cover 26 and a rear pressure cover 32 to fix the turntable bearing 27, clamp the turntable bearing 27 between the front frame 25 and the turntable 6, and prevent the turntable bearing 27 from shifting.

[0054] Furthermore, the contour-following track-type internal hole polishing machine also includes a motor mounting base 7 connected to the rear pressure cover 32, and the rotation mechanism drive device is mounted on the motor mounting base 7.

[0055] In this invention, grooves extending along the track direction are provided on both sides of the track 14, and a drive chain 11 is provided in the groove on the side of the track 14 where the connecting shaft 24 is located. The sprocket 3 meshes with the drive chain 11.

[0056] For example, the drive chain 11 is fixed in the groove by chain clamping blocks 12 and clamping block screws 13. It should be noted that when the drive chain 11 is located inside the arc-shaped track, the drive chain 11 is fixed by multiple chain clamping blocks 12 and clamping block screws 13 to prevent the drive chain 11 from coming out of the groove.

[0057] In this invention, the track 14 can be a modular assembly type or an integral type.

[0058] Furthermore, the track 14 is a contour track with a cross-section in the shape of a "well" (or "grid"). This results in grooves 1401 on the top, bottom, left, and right sides of the track, and each groove 1401 is formed by two parallel partitions 1402. It should be noted that the partitions 1402 and the main body of the track 14 are integrally formed, meaning the "well"-shaped track 14 is integrally molded.

[0059] On the side where the connecting shaft 24 is located, two front clamping bearings 9 are respectively located on the upper and lower sides of the side groove, and clamp the partitions of the upper and lower grooves of the track 14. Two rear clamping bearings 4 are respectively located on the upper and lower sides of the side groove, and clamp the partitions of the upper and lower grooves of the track 14. On the side where the spring 21 is located, two intermediate clamping bearings 29 are respectively located on the upper and lower sides of the side groove, and clamp the partitions of the upper and lower grooves of the track 14.

[0060] The polishing machine of the present invention can travel along the track 14 with various curvatures. The travel speed and position can be controlled by controlling the servo motor 1. The designated position can be polished by using sandpaper 16.

[0061] When polishing the inner hole of a pipe using the contour-following track-type inner hole polishing machine of the present invention, the track 14 is the same shape as the pipe to be polished. The track 14 is placed inside the pipe, and the polishing device runs from one end of the pipe to the other end. At the same time, the main drive motor 18 drives the gear 31 to rotate. The gear 31 drives the internal gear ring 28 and the turntable 6 to rotate, which in turn drives the adjusting plate 8 to rotate. The spring 17 on the adjusting plate 8 presses the sandpaper 16 onto the inner wall of the pipe to rotate and polish the inner wall. The servo motor 1 and the reducer 2 drive the sprocket 3 to rotate. The sprocket 3 and the drive chain 11 drive the frame to move forward, thereby polishing the inner wall of the entire pipe. During this process, the spring 21 will stretch or shorten with different turning angles. At the same time, the rebound force of the spring 21 ensures that the front clamping bearing 9, the middle clamping bearing 29 and the rear clamping bearing 4 press against the track 14 at the same time, ensuring that the polishing device runs along the trajectory of the track 14.

[0062] The following specific embodiments further illustrate the contour-following track-type internal hole polishing machine of the present invention.

[0063] Example 1

[0064] A contour-following track-type internal hole polishing machine includes a track and a polishing device mounted on and capable of running along the track. The polishing device includes a rotating mechanism capable of rotating around the track. Multiple strip-shaped springs are mounted on the rotating mechanism, with one end of each spring fixed to the rotating mechanism by spring fixing screws, and the other end fitted with sandpaper. The polishing device also includes a frame, a frame drive unit, and a rotating mechanism drive unit, all mounted on the frame. The rotation direction of the rotating mechanism is perpendicular to the running direction of the polishing device.

[0065] The frame includes a front frame and a rear frame arranged sequentially. A rotating mechanism and a drive unit for the rotating mechanism are mounted on the front frame, and the frame drive unit is mounted on the rear frame. A track passes through the front and rear frames. The front and rear frames are connected on one side of the track by a connecting shaft, allowing them to rotate around the connecting shaft. On the other side of the track, the front and rear frames are connected by multiple parallel springs. Along the direction of movement of the polishing device, on the side with the connecting shaft, a front clamping bearing is located at the front end of the front frame, and a rear clamping bearing is located at the rear end of the rear frame. On the side with the springs, an intermediate clamping bearing is located at the rear end of the front frame. The front, rear, and intermediate clamping bearings press against the track. Two of each type of clamping bearing are arranged vertically opposite each other.

[0066] The frame drive unit includes a servo motor and a reducer, which are fixedly connected. A rear axle is provided at the rear end of the rear frame, and the rear axle is connected to the output shaft of the reducer. A rear clamping bearing and a sprocket are fitted on the rear axle.

[0067] The main body of the front frame is a hollow cylinder, through which the rail passes. Two parallel front bosses are arranged at the front end of the front frame, one above and one below the rail. A front pin is vertically mounted on the side of each front boss closest to the rail, located on the side where the connecting shaft is located. Two front clamping bearings are respectively fitted onto the front pins. At the rear end of the front frame on the side where the spring is located, two parallel rear bosses are arranged at the rear end, one above and one below the rail. A central pin is vertically mounted on the side of each rear boss closest to the rail, and two central clamping bearings are respectively fitted onto the central pins. The rear frame includes an upper structural unit and a lower structural unit arranged parallel to each other in an L-shape. The upper and lower structural units are connected by a connecting column, and the rail passes between the upper and lower structural units. The openings of the L-shaped rear frame face forward and towards the side where the spring is located. On the side where the springs are located, spring pin seats are respectively installed at the rear end of the front frame and on both the upper and lower sides of the track. A front spring pin is located between the two spring pin seats. A rear spring pin is located between the upper and lower structural units of the rear frame. One end of the spring is connected to the front spring pin, and the other end is connected to the rear spring pin. On the side where the connecting shaft is located, rear wheel axles are vertically installed at the rear ends of the opposite faces of the upper and lower structural units of the rear frame. Two rear clamping bearings are respectively sleeved on the rear wheel axles between the upper and lower structural units. The rear wheel axle located in the upper structural unit passes through the upper structural unit and connects to the output shaft of the reducer, and the sprocket is also sleeved on this rear wheel axle. The output shaft of the reducer has a hollow structure, into which the rear wheel axle can be inserted.

[0068] The rotating mechanism includes a turntable mounted on the front frame and an adjusting plate mounted on the turntable. The turntable and adjusting plate are fixedly connected, and the turntable and front frame are connected via a turntable bearing. One end of a spring is fixed to the adjusting plate, and the other end is connected to sandpaper. A circular stop is provided on the surface of the front frame that contacts the turntable bearing for mounting the turntable bearing. The turntable can have an L-shaped cross-section, and the adjusting plate is mounted on one side of the L-shaped turntable. An internal gear ring is provided on the outer side of the other side of the L-shaped turntable. A gear is provided on the rotating mechanism drive device, and the gear meshes with the internal gear ring. The internal gear ring is fixedly connected to the turntable. The rotating mechanism drive device is connected to the gear via a shaft, and the outer diameter of the gear is smaller than the inner diameter of the internal gear ring. The turntable and the adjusting plate can be connected by screws. The rotating mechanism drive device includes four main drive motors, two of which are arranged side-by-side on the upper side of the track, and the other two are arranged side-by-side on the lower side of the track. Each main drive motor has a corresponding gear, and each gear meshes with the internal gear ring.

[0069] The front and rear ends of the front frame are respectively equipped with a front pressure cover and a rear pressure cover for fixing the turntable bearing, clamping the turntable bearing between the front frame and the turntable. The contour track-type internal hole polishing machine also includes a motor mounting base connected to the rear pressure cover, and the rotation mechanism drive device is mounted on the motor mounting base.

[0070] The track has grooves extending along its direction on both sides. A drive chain is installed in the groove on the side of the track where the connecting shaft is located. The sprocket meshes with the drive chain. The drive chain is fixed in the groove by chain clamps and clamp screws. The track is a modular assembly type. It is a contoured track with a "well" shaped cross-section, resulting in grooves on the top, bottom, left, and right sides. Each groove is formed by two parallel partitions, and the "well" shaped track is integrally molded. On the side where the connecting shaft is located, two front clamping bearings are positioned on the top and bottom sides of the groove, respectively, clamping the partitions of the top and bottom grooves. Two rear clamping bearings are also positioned on the top and bottom sides of the groove, clamping the partitions of the top and bottom grooves. On the side where the spring is located, two intermediate clamping bearings are positioned on the top and bottom sides of the groove, respectively, clamping the partitions of the top and bottom grooves.

[0071] The track of the aforementioned contour-following track-type internal hole polishing machine has the same shape as the pipe to be polished. That is, the pipe includes a straight section and an arc section connected to the straight section, and the track also includes a straight section and an arc section with the same curved shape as the pipe. After the straight section and the arc section of the track are spliced ​​together, they are placed inside the pipe. The polishing device runs from one end of the pipe to the other end. At the same time, the turntable is rotated by the main drive motor, and the sandpaper is pressed onto the inner wall of the pipe by the spring. The forward movement of the frame and the polishing position are controlled by the servo motor and the reducer, thereby realizing the polishing of the inner wall of the straight section + arc section pipe.

[0072] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A contour-following track-type internal hole polishing machine, characterized in that, The contour-following track-type internal hole polishing machine includes a track (14) and a polishing device capable of running along the track (14); the polishing device includes a frame, a frame drive device, a rotation mechanism drive device, and a rotation mechanism capable of rotating around the track; the rotation mechanism, the frame drive device, and the rotation mechanism drive device are all mounted on the frame; the rotation mechanism drive device is connected to the rotation mechanism; the rotation mechanism is provided with a plurality of strip-shaped springs (17), one end of the strip-shaped springs is fixed on the rotation mechanism, and the other end is provided with sandpaper (16). The frame includes a front frame (25) and a rear frame (5) arranged sequentially front to back. The rotating mechanism and the rotating mechanism drive device are mounted on the front frame (25), and the frame drive device is mounted on the rear frame (5). The track (14) passes through the front frame (25) and the rear frame (5). The front frame (25) and the rear frame (5) are connected on one side of the track (14) by a connecting shaft (24). The front frame (25) and the rear frame (5) are rotatable around the connecting shaft (24). The front frame (25) and the rear frame (5) are connected on the other side of the track (14) by a spring (21). The rear frame (5) is connected to the track (14) by a transmission link. Along the direction of movement of the polishing device, on the side where the connecting shaft (24) is provided, the front end of the front frame (25) is provided with a front clamping bearing (9), and the rear end of the rear frame (5) is provided with a rear clamping bearing (4); on the side where the spring (21) is provided, the rear end of the front frame (25) is provided with an intermediate clamping bearing (29); the front clamping bearing (9), the rear clamping bearing (4) and the intermediate clamping bearing (29) press against the track (14), and the front clamping bearing (9), the rear clamping bearing (4) and the intermediate clamping bearing (29) are respectively provided in two opposite positions.

2. The contour-following track-type internal hole polishing machine according to claim 1, characterized in that, The rotating mechanism includes a turntable (6) sleeved on the front frame (25) and an adjustment plate (8) sleeved on the turntable (6). The turntable (6) and the adjustment plate (8) are fixedly connected. The turntable (6) and the front frame (25) are connected by a turntable bearing (27).

3. The contour-following track-type internal hole polishing machine according to claim 2, characterized in that, The front end and rear end of the front frame (25) are respectively provided with a front pressure cover (26) and a rear pressure cover (32) for fixing the turntable bearing (27).

4. The contour-following track-type internal hole polishing machine according to claim 2, characterized in that, An internal gear ring (28) is provided on one side of the turntable (6), and a gear (31) is provided on the rotating mechanism drive device, the gear (31) meshing with the internal gear ring (28).

5. The contour-following track-type internal hole polishing machine according to claim 1, characterized in that, The track (14) has grooves extending along the track direction on both sides. A drive chain (11) is provided in the groove on the side of the track (14) where the connecting shaft (24) is located. The frame drive device acts on the drive chain (11) to make the frame run on the track (14).

6. The contour-following track-type internal hole polishing machine according to claim 5, characterized in that, The frame drive device includes a servo motor (1) and a reducer (2), the servo motor (1) and the reducer (2) are fixedly connected, the rear end of the rear frame (5) is provided with a rear wheel axle (23), the rear wheel axle (23) is connected to the output shaft of the reducer (2), the rear wheel axle (23) is fitted with a rear pressure bearing (4) and a sprocket (3), and the sprocket (3) meshes with the drive chain (11).

7. The contour-following track-type internal hole polishing machine according to claim 6, characterized in that, The drive chain (11) is fixed in the groove by the chain clamp (12) and the clamp screw (13).

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