Polishing and grinding tool for outer cylindrical surface of large cylinder and using method of polishing and grinding tool

Abstract

The invention relates to a polishing and grinding tool for the outer cylindrical surface of a large cylinder and a using method of the polishing and grinding tool, and belongs to the technical field of large mechanical polishing and grinding. The bearing seat is mounted on the top surface of the base through an adjusting mechanism, and the adjusting mechanism is used for adjusting the distance between the bearing seat and the base; the transmission circular shaft is rotationally mounted on the bearing seat through a bearing, and the central axis of the transmission circular shaft is parallel to the top surface of the base; one end of the transmission circular shaft extends out of the bearing seat and is connected with the power source, and the power source is used for driving the transmission circular shaft to rotate; a connecting shaft extending out of the bearing seat is arranged in the center of the other end of the transmission shaft, the grinding wheel is detachably and fixedly connected to the connecting shaft, and the grinding wheel and the transmission circular shaft are coaxial. According to the use method, the tool is used for polishing and grinding the outer cylindrical surface of the large cylinder. The tool is simple in structure, high in polishing and grinding efficiency and precision and lower in use cost and manufacturing cost.

Description

Technical Field

[0001] This invention belongs to the field of large-scale mechanical polishing technology, and specifically relates to a polishing fixture for the outer cylindrical surface of a large cylinder and its application method. Background Technology

[0002] Currently, the actuators of some high-end heavy equipment are large cylinders with radii ranging from 2 to 4 meters, characterized by their large size and heavy weight. After forging, these cylinders require further surface hardening with high-wear-resistant and corrosion-resistant alloy materials to enhance their surface performance under harsh service conditions. Following hardening and finishing, polishing is also necessary in specific areas to further improve precision.

[0003] In existing technologies, polishing is often performed by manually holding a grinding wheel or by using a robotic arm to hold the grinding wheel. Manual polishing is time-consuming, labor-intensive, inefficient, and difficult to control the polishing precision. While polishing with a robotic arm to hold the grinding wheel is more efficient, it is expensive and not suitable for polishing large single cylindrical objects. Summary of the Invention

[0004] This invention provides a polishing fixture for the outer cylindrical surface of a large cylinder and its application method, which is used to efficiently polish the surface of a large cylinder. The fixture has a simple structure, is easy to operate, and has higher polishing accuracy and lower cost.

[0005] This invention is achieved through the following technical solution: a polishing fixture for the outer cylindrical surface of a large cylinder, comprising:

[0006] The base is detachably and fixedly connected to the outer cylindrical surface of the cylinder via a connecting part;

[0007] A bearing housing is mounted on the top surface of the base via an adjustment mechanism, wherein the adjustment mechanism is used to adjust the distance between the bearing housing and the base;

[0008] A transmission shaft is rotatably mounted on the bearing seat via a bearing, and the central axis of the transmission shaft is parallel to the top surface of the base;

[0009] A power source is provided, wherein one end of the transmission shaft extends out of the bearing housing and is connected to the power source, and the power source is used to drive the transmission shaft to rotate.

[0010] The grinding wheel has a connecting shaft extending out of the bearing seat at the center of the other end of the transmission shaft. The grinding wheel is detachably and fixedly connected to the connecting shaft, and the grinding wheel is coaxial with the transmission shaft.

[0011] Furthermore, to better realize the present invention, the adjustment mechanism includes:

[0012] The base is fixed to the top surface of the base by bolts, and the base is provided with a circular internally threaded tube with the opening facing upward;

[0013] The intermediate cylinder is slidably fitted onto the outer side of the circular internally threaded tube at its lower part. The upper part of the intermediate cylinder is provided with an internally threaded through hole, and the outer wall of the intermediate cylinder is provided with a slide rail.

[0014] The top seat is bolted to the bottom surface of the bearing housing. The top seat has a straight tube with an opening facing downwards. A guide protrusion is provided on the inner wall of the straight tube. The guide protrusion extends along the axial direction of the straight tube and is adapted to the slide rail. The straight tube is slidably fitted onto the outside of the intermediate cylinder. The guide protrusion is slidably inserted into the slide rail. The top end of the intermediate cylinder abuts against the top seat. The top seat also has a through hole communicating with the internal thread through hole.

[0015] The stud has a first threaded section at the top and a second threaded section at the bottom. The first threaded section is screwed into the internal threaded through hole, and the second threaded section is screwed into the circular internal threaded tube.

[0016] Furthermore, in order to better realize the present invention, the number of the adjustment mechanisms is four, and the four adjustment mechanisms are evenly distributed on both sides below the transmission shaft;

[0017] The radius of the first threaded segment is greater than that of the second threaded segment, and the pitch of the first threaded segment is greater than that of the second threaded segment.

[0018] Furthermore, in order to better realize the present invention, the lower part of the straight tube wall is provided with a through hole, the lower part of the intermediate cylinder is provided with a locking screw hole, and a locking bolt is also included. The locking bolt passes through the through hole and is screwed into the locking screw hole. When locked, the locking bolt presses against the outer wall of the circular internal thread tube.

[0019] Furthermore, to better realize the present invention, the bearing housing includes:

[0020] The lower body is provided with an extension plate. The top seat is fixed to the bottom surface of the extension plate by bolts, and the extension plate is provided with a through hole corresponding to the through hole.

[0021] The upper seat is bolted to the lower seat, and a bearing mounting hole for mounting a bearing is formed between the upper seat and the lower seat.

[0022] Furthermore, in order to better realize the present invention, the connecting part is a magnetic base with a control handle, the magnetic base is installed inside the extension plate, and the control handle is disposed on the extension plate.

[0023] Furthermore, in order to better realize the present invention, the bottom surface of the base is an arc surface, and the radius of curvature of the arc surface is the same as that of the outer cylindrical surface of the cylinder.

[0024] Furthermore, in order to better realize the present invention, the power source is a pneumatic motor, which is connected to a high-pressure air source through a hose.

[0025] Furthermore, in order to better realize the present invention, the end of the connecting shaft opposite to the transmission shaft is provided with a threaded hole, and it also includes a clamping bolt and a pressure cap. The pressure cap is provided with a central hole, and the threaded section of the clamping bolt passes through the central hole and the inner hole of the grinding wheel in sequence and is screwed into the threaded hole.

[0026] The method provided by this invention uses the above-described polishing fixture to polish the outer cylindrical surface of a cylinder, including:

[0027] Step 1: Attach the base to the outer cylindrical surface of the cylinder;

[0028] Step 2: Adjust the distance between the bearing seat and the base of the adjustment mechanism so that the distance between the central axis of the central shaft and the outer cylindrical surface of the cylinder is the same as the radius of the grinding wheel.

[0029] Step 3: Based on the height of the hard spot to be ground on the outer cylindrical surface of the cylinder, adjust the adjustment mechanism again so that the central circular shaft moves away from the base by a distance equal to the height of the hard spot to be ground.

[0030] Step 4: Install the grinding wheel onto the connecting shaft so that the grinding wheel contacts the hard spot to be ground;

[0031] Step 5: Start the power source to drive the central shaft to rotate the grinding wheel and begin polishing the hard spots to be polished;

[0032] Step 6: Adjust the adjustment mechanism in real time according to the grinding situation so that the grinding wheel polishes the hard points to be ground until the polishing of the hard points is completed.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] The polishing fixture for the outer cylindrical surface of a large cylinder provided by this invention is connected to the outer cylindrical surface of the cylinder via a base and a connecting part. A power source drives a transmission shaft to rotate a grinding wheel, which polishes the hard points on the outer cylindrical surface of the cylinder. An adjustment mechanism allows for easy adjustment of the distance between the grinding wheel and the outer cylindrical surface of the cylinder, thereby precisely adjusting the polishing accuracy. This fixture has a simple structure, low cost, and only requires adjustment of the adjustment mechanism during polishing, making it easy to use. Thus, this fixture can replace manual hand-held polishing and robotic arm-held polishing, resulting in higher polishing efficiency, higher polishing accuracy, and lower operating costs. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a reference diagram of the use of the polishing fixture for the outer cylindrical surface of a large cylinder provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the polishing fixture for the outer cylindrical surface of a large cylinder provided in an embodiment of the present invention (power source not shown).

[0038] Figure 3 This is a schematic diagram of the adjustment mechanism in an embodiment of the present invention;

[0039] Figure 4 yes Figure 3 A cross-sectional view of the adjustment mechanism shown;

[0040] Figure 5 This is a schematic diagram of the structure of the intermediate cylinder in an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the top seat in an embodiment of the present invention.

[0042] In the picture:

[0043] 100-Cylinder, 110-Electric roller frame, 200-Base, 210-Arc surface, 300-Control handle, 400-Bearing seat, 410-Lower seat, 420-Upper seat, 500-Adjustment mechanism, 510-Base, 511-Circular internal threaded tube, 520-Intermediate cylinder, 521-Slide rail, 530-Top seat, 531-Straight tube, 532-Guide ridge, 540-Stud, 550-Locking bolt, 600-Drive shaft, 700-Pneumatic motor, 710-Hose, 720-High pressure air source, 800-Grinding wheel, 810-Pressure bolt, 820-Granty cap. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] Example 1:

[0046] like Figures 1-6 As shown, this embodiment provides a polishing fixture for the outer cylindrical surface of a large cylinder, used to replace manual hand-held polishing with a grinding wheel 800 and robotic arm-held polishing with a grinding wheel 800 for polishing the outer cylindrical surface of a large cylinder 100. The polishing fixture includes a base 200, a bearing seat 400, an adjusting mechanism 500, a transmission shaft 600, a power source, and a grinding wheel 800, wherein:

[0047] The base 200 is detachably and fixedly connected to the outer cylindrical surface of the cylinder 100 via a connecting part. It is worth noting that the cylinder 100 has a radius of 2-3 meters, classifying it as a large component. The connecting part allows for quick detachment or installation of the base 200 on the outer cylindrical surface of the cylinder 100. Optionally, the connecting part can be a magnetic base, installed within the base 200. Similar to existing technologies, this magnetic base is equipped with a control handle 300. Using the control handle 300, the magnetic field of the magnetic base can be adjusted, thereby controlling the adsorption and release of the base 200 on the outer cylindrical surface of the cylinder 100. In this case, the cylinder 100 is a ferromagnetic material, and the magnetic base can be magnetically attached to its surface. Alternatively, the connecting part can be a strap, which binds the base 200 to the outer cylindrical surface of the cylinder 100.

[0048] The bearing housing 400 is mounted on the top surface of the base 200 via the aforementioned adjusting mechanism 500, which is used to adjust the distance between the bearing housing 400 and the base 200. The transmission shaft 600 is rotatably mounted on the bearing housing 400 via bearings. Specifically, the bearing housing 400 has two bearing mounting holes, each housing one bearing. Both bearings are simultaneously fitted onto the transmission shaft 600, and the central axis of the transmission shaft 600 is parallel to the top surface of the base 200. Adjusting the adjusting mechanism 500 changes the distance between the central axis of the transmission shaft 600 and the top surface of the base 200, thereby changing the distance between the central axis of the transmission shaft 600 and the outer cylindrical surface of the cylinder 100. One end of the transmission shaft 600 extends out of the bearing housing 400 and is connected to a power source, thereby using the power source to drive the transmission shaft 600 to rotate.

[0049] The other end of the aforementioned transmission shaft 600 has a connecting shaft extending from the bearing seat 400. This connecting shaft is coaxial with the transmission shaft 600. The grinding wheel 800 is detachably and fixedly connected to this connecting shaft, making the grinding wheel 800 coaxial with the transmission shaft 600. Thus, the transmission shaft 600 can drive the grinding wheel 800 to rotate. Specifically, when the power source drives the transmission shaft 600 to rotate, it drives the grinding wheel 800 to rotate. Optionally, a threaded hole is provided at the end of the connecting shaft opposite to the transmission shaft. The shaft also includes a pressure cap 820 and a clamping bolt 810. The pressure cap 820 has a central hole. The threaded section of the clamping bolt 810 passes sequentially through the central hole and the inner hole of the grinding wheel 800 before being screwed into the threaded hole. When the clamping bolt 810 is tightened, the nut of the clamping bolt 810 presses the pressure cap 820 onto the grinding wheel 800, thereby pressing the grinding wheel 800 against the end face of the connecting shaft. In addition, the power source mentioned above is a pneumatic motor 700, which is connected to a high-pressure air source 720 via a hose 710. Of course, the power source could also be an electric motor mounted on the base 200.

[0050] More preferably, in order to better fit the base 200 against the outer cylindrical surface of the cylinder 100, in this embodiment, the bottom surface of the base 200 is an arc surface 210, and the radius of curvature of the arc surface 210 is the same as that of the outer cylindrical surface of the cylinder 100. With the bottom surface of the base 200 in contact with the outer cylindrical surface of the cylinder 100, the entire polishing fixture can be more securely connected to the outer cylindrical surface of the cylinder 100, improving stability during polishing.

[0051] When using this polishing fixture, the base 200 is first connected to the outer cylindrical surface of the cylinder 100. Then, the distance between the bearing seat 400 and the base 200 is adjusted using the adjusting mechanism 500 so that the distance between the central axis of the central shaft and the outer cylindrical surface of the cylinder 100 is the same as the radius of the grinding wheel 800. This ensures that even when the grinding wheel 800 is moved closest to the outer cylindrical surface of the cylinder 100, its outer edge will only be tangent to the outer cylindrical surface, thus avoiding over-cutting. Then, based on the height of the hard spots to be polished on the outer cylindrical surface of the cylinder 100, the fixture is adjusted again... Adjusting mechanism 500 is used to move the central circular shaft away from the base 200 by a distance equal to the height of the hard point to be polished. Then, grinding wheel 800 is installed on the connecting shaft so that it contacts the hard point to be polished. After that, the power source is started to drive the central circular shaft to rotate the grinding wheel 800 and begin polishing the hard point. Finally, according to the actual polishing situation (as polishing progresses, the height of the hard point to be polished decreases), adjusting mechanism 500 is adjusted in real time so that grinding wheel 800 gradually approaches the outer cylindrical surface of cylinder 100 to continuously polish the hard point until polishing is complete.

[0052] With the above structure, this fixture can replace manual hand-held grinding wheel 800 for polishing and robotic arm holding grinding wheel 800 for polishing. It has higher polishing efficiency, simple overall fixture structure, and lower manufacturing and usage costs. During polishing, only the adjustment mechanism 500 needs to be adjusted, making it convenient to use and improving polishing accuracy.

[0053] Optionally, the aforementioned adjustment mechanism 500 includes a base 510, an intermediate cylinder 520, a top seat 530, and a stud 540, wherein:

[0054] The base 510 is bolted to the top surface of the base 200. The base 510 has an upward-opening circular internally threaded tube 511 that extends vertically. The lower part of the intermediate cylinder 520 is slidably fitted onto the circular internally threaded tube 511. The upper part of the intermediate cylinder 520 has an internally threaded through hole that communicates with the inner hole of the circular internally threaded tube 511. The outer wall of the intermediate cylinder 520 has a vertically extending slide rail 521. The top seat 530 is bolted to the bearing seat. On the bottom surface of 400, the top seat 530 is provided with a straight tube 531 with its opening facing downwards. The straight tube 531 also extends vertically. The inner wall of the straight tube 531 is provided with a guide protrusion 532. The guide protrusion 532 extends axially along the straight tube 531 and is adapted to the slide rail 521. The straight tube 531 is slidably fitted onto the outside of the intermediate cylinder 520. The guide protrusion 532 is slidably inserted into the slide rail 521. The top end of the intermediate cylinder 520 abuts against the top seat 530. The top seat 530 is also provided with a through hole communicating with the internal threaded through hole. Through the above structure, the top seat 530 is fixed to the bearing seat 400, and the base 510 is fixed to the base 200. The upper part of the stud 540 is a first threaded section, and the lower part is a second threaded section. The first threaded section is screwed into the internal threaded through hole, and the second threaded section is screwed into the circular internal threaded tube 511.

[0055] Furthermore, there are four adjustment mechanisms 500, evenly distributed on both sides below the transmission shaft 600. With this structure, when the stud 540 is rotated, neither the top seat 530 nor the base 510 rotates, and the intermediate cylinder 520 is locked due to the cooperation of the guide rib 532 and the sliding groove, meaning the intermediate cylinder 520 also does not rotate. Therefore, the rotating stud 540 will cause the intermediate cylinder 520 to move upward / downward relative to the base 510 by a first distance. Simultaneously, the stud 540 will also drive the intermediate cylinder 520 to move upward / downward relative to the stud 540 by a second distance. Thus, the actual upward / moving distance of the intermediate cylinder 520 relative to the base 510 is the sum of the first and second distances. Since the top of the intermediate cylinder 520 abuts against the base 510, this structure allows for faster upward / downward movement of the top seat 530, resulting in more sensitive adjustment. Optionally, in this embodiment, the radius of the first threaded segment is larger than that of the second threaded segment, and the pitch of the first threaded segment is larger than that of the second threaded segment. Specifically, the pitch of the first threaded segment is twice that of the second threaded segment, defined as 2P, and the pitch of the second threaded segment as P. Thus, when the stud 540 rotates one revolution, the top seat 530 rises / falls 3P relative to the base 510 and the base 200. This allows for faster adjustment of the distance between the grinding wheel 800 and the outer cylindrical surface of the cylinder 100. Furthermore, the stud 540 is simultaneously threaded into the internal threaded hole of the circular internal threaded tube 511 and the intermediate cylinder 520, resulting in a larger contact area, better vibration resistance, and improved polishing accuracy.

[0056] In this embodiment, the second threaded segment is screwed to the circular internally threaded tube 511 of the base 510. The thread helix angle of the thread pair formed by the second threaded segment and the internal thread of the circular internally threaded tube 511 is less than or equal to the equivalent friction angle. Thus, self-locking can be achieved by using the screw connection between the second threaded segment and the circular internally threaded tube 511. That is, the top seat 530 can be locked in the current position without rotating the stud 540. Because vibration will occur during polishing, in order to better achieve locking, in this embodiment, a through hole is opened in the lower part of the tube wall of the straight tube 531, and a locking screw hole is opened in the lower part of the intermediate cylinder 520. It also includes a locking bolt 550. The locking bolt 550 passes through the through hole and is screwed into the locking screw hole. When locked, the locking bolt 550 presses against the outer wall of the circular internally threaded tube 511. In this way, when the locking bolt 550 is loosened, the adjustment mechanism 500 can be adjusted, and when the locking bolt 550 is tightened, the adjustment mechanism 500 can be further locked. More preferably, a 5mm thick rubber pad is glued to the end of the aforementioned locking bolt 550.

[0057] In fact, a vertical circular hole is provided on the outer extension plate of the lower seat 410, and the adjustment mechanism 500 is placed in the vertical circular hole. An operating hole (not shown in the figure) corresponding to the position of the locking bolt 550 is also provided on the hole wall of the vertical circular hole. The locking bolt 550 is rotatably placed in the operating hole, and the operator can insert a screwdriver into the operating hole to tighten the locking bolt 550.

[0058] Optionally, the bearing housing 400 described above includes an upper housing 420 and a lower housing 410, wherein:

[0059] The lower body 410 is provided with an extension plate, and the top seat 530 is fixed to the bottom surface of the extension plate by bolts. The extension plate has a through hole corresponding to the through hole, so that the user can turn the stud 540 through the through hole. In fact, the top of the stud 540 is provided with a cross-shaped screwdriver bit, a flathead screwdriver bit, or a regular hexagonal concave hole so that the user can turn the stud 540. Of course, a round rod can also be provided at the top of the stud 540. The round rod slides up and down into the through hole and extends out of the through hole. The top of the round rod is provided with a regular hexagonal body so as to connect a wrench.

[0060] The upper seat 420 is fixed to the lower seat 410 by bolts, and a bearing mounting hole for mounting a bearing is formed between the upper seat 420 and the lower seat 410.

[0061] Example 2:

[0062] This embodiment provides a method for using the polishing fixture provided in Embodiment 1 to polish the hard spots to be polished on the outer cylindrical surface of a large cylinder 100. The method includes the following steps:

[0063] Step 1: Connect the base 200 to the outer cylindrical surface of the cylinder 100. Specifically, first determine the location of the hard spot to be ground, then align the arc surface 210 of the base 200 with the outer cylindrical surface next to the hard spot, and then operate the control handle 300 to make the base 200 adhere to the outer cylindrical surface of the cylinder 100. It is worth noting that the bearing seat 400 and the transmission shaft 600 mentioned above have been pre-installed on the base 200.

[0064] Step 2: Using the distance between the bearing seat 400 and the base 200 of the adjusting mechanism 500, the distance between the central axis of the central shaft and the outer cylindrical surface of the cylinder 100 is made the same as the radius of the grinding wheel 800. Specifically, loosen the locking bolt 550 and turn the stud 540, thereby moving the transmission shaft 600 away from the outer cylindrical surface until the distance between the central axis of the central shaft and the outer cylindrical surface of the cylinder 100 is the same as the radius of the grinding wheel 800.

[0065] Step 3: Based on the height of the hard spot to be ground on the outer cylindrical surface of cylinder 100, adjust the adjustment mechanism 500 again so that the central shaft moves away from the base 200 by a distance equal to the height of the hard spot to be ground. In this step, the height of the hard spot to be ground must first be measured. In practice, multiple hard spots to be ground are discretely distributed on the surface of the large cylinder 100, and the height of each hard spot is almost the same. In actual operation, continue to turn the stud 540 so that the transmission shaft 600 continues to move away from the outer cylindrical surface. Stop when the distance between the central axis of the central shaft and the outer cylindrical surface of cylinder 100 is equal to the sum of the radius of the grinding wheel 800 and the height of the hard spot to be ground. Then tighten the locking bolt 550.

[0066] Step 4: Install the grinding wheel 800 onto the connecting shaft, ensuring that the grinding wheel 800 contacts the hard spot to be ground. In this step, first press the pressure cap 820 onto the surface of the grinding wheel 800. Then, pass the stud 540 of the bolt through the center hole of the pressure cap 820 and the inner hole of the grinding wheel 800, and screw it into the threaded hole of the connecting shaft until the clamping bolt 810 is tightened. At this point, the grinding wheel 800 contacts the end of the hard spot to be ground that is away from the outer cylindrical surface of the cylinder 100.

[0067] Step 5: Start the power source to drive the central shaft to rotate the grinding wheel 800, beginning the polishing of the hard spots to be polished. This step involves starting the pneumatic motor 700 with air supply, which in turn drives the transmission shaft 600 to rotate the grinding wheel 800, thus beginning the polishing of the hard spots. During the polishing process, the rotation speed of the pneumatic motor 700 driving the transmission shaft is controlled at 2800 rpm.

[0068] Step 6: Adjust the adjustment mechanism 500 in real time according to the grinding progress, so that the grinding wheel 800 polishes the hard point to be ground until the polishing is complete. Specifically, as the polishing proceeds, the height of the hard point to be ground gradually decreases. At this point, it is necessary to loosen the locking bolt 550 and reverse the stud 540 in real time, thereby driving the grinding wheel 800 to gradually approach the outer cylindrical surface of the cylinder 100. Of course, since there are four studs 540, two or four workers can be arranged to adjust all four studs 540 simultaneously. Although the manual labor input is higher, the workload is lower and the polishing efficiency is higher. Because of the settings in steps 2 and 3, when the adjustment mechanism 500 is adjusted to the lowest point, the grinding wheel 800 is exactly tangent to the outer cylindrical surface of the cylinder 100, which can effectively avoid over-cutting during polishing and ensure the grinding accuracy.

[0069] Of course, before polishing, the cylinder 100 needs to be fixed by an electric roller frame 110.

[0070] After polishing one hard spot, the entire fixture is removed and the condition of the grinding wheel 800 is checked. If the grinding wheel 800 is severely worn, a new grinding wheel 800 is used to continue polishing the remaining hard spots. Statistical analysis shows that manually polishing the outer cylindrical surface of a large cylinder 100mm with a handheld grinding wheel 800 takes 20 days, while using this fixture and the method described above only takes 2.5 days, and no over-polishing issues have occurred.

[0071] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A large cylindrical outer cylindrical surface polishing tool, characterized in that, The application relates to a large-scale cylindrical surface grinding device, which comprises the following parts: a base (200) which is detachably fixedly connected to the outer cylindrical surface of a cylinder (100) through a connecting part; a bearing seat (400) which is installed on the top surface of the base (200) through an adjusting mechanism (500), wherein the adjusting mechanism (500) is used for adjusting the distance between the bearing seat (400) and the base (200); a transmission circular shaft (600) which is rotatably installed on the bearing seat (400) through a bearing, and the central axis of the transmission circular shaft (600) is parallel to the top surface of the base (200); a power source, one end of the transmission circular shaft (600) extends out of the bearing seat (400) and is connected with the power source, and the power source is used for driving the transmission circular shaft (600) to rotate; a grinding wheel (800), the other end of the transmission shaft is provided with a connecting shaft which extends out of the bearing seat (400), the grinding wheel (800) is detachably fixedly connected to the connecting shaft, and the grinding wheel (800) is coaxial with the transmission circular shaft (600).

2. The polishing tool for the outer cylindrical surface of a large cylindrical body according to claim 1, wherein The adjusting mechanism (500) comprises: a base (510) which is fixed on the top surface of the base (200) through bolt fastening, and the base (510) is provided with a circular inner threaded pipe (511) which is upwardly opened; an intermediate cylinder (520) which is slidingly sleeved on the outer surface of the circular inner threaded pipe (511) in an up-down mode, the upper portion of the intermediate cylinder (520) is provided with an inner threaded through hole, and the outer wall of the intermediate cylinder (520) is provided with a slide (521); a top base (530) which is fixed on the bottom surface of the bearing seat (400) through bolt fastening, the top base (530) is provided with a straight pipe (531) which is downwardly opened, the inner wall of the straight pipe (531) is provided with a guide convex strip (532) which extends along the axial direction of the straight pipe (531) and is matched with the slide (521), the straight pipe (531) is slidingly sleeved on the outer surface of the intermediate cylinder (520) in an up-down mode, the guide convex strip (532) is slidingly inserted into the slide (521), the top end of the intermediate cylinder (520) abuts against the top base (530), and the top base (530) is further provided with a through hole which is communicated with the inner threaded through hole; a stud (540) which is provided with a first threaded section in the upper portion and a second threaded section in the lower portion, the first threaded section is screwed into the inner threaded through hole, and the second threaded section is screwed into the circular inner threaded pipe (511).

3. The large-scale cylindrical surface grinding device according to claim 2, wherein: the number of the adjusting mechanisms (500) is four, and the four adjusting mechanisms (500) are uniformly distributed on the lower sides of the transmission circular shaft (600); the radius of the first threaded section is larger than that of the second threaded section, and the pitch of the first threaded section is larger than that of the second threaded section.

4. The large-scale cylindrical surface grinding device according to claim 3, wherein: The lower pipe wall of the straight pipe (531) is provided with a through hole, the lower part of the middle cylinder (520) is provided with a locking screw hole, and the locking screw bolt (550) passes through the through hole and is screwed into the locking screw hole.

5. The polishing tool for the outer cylindrical surface of a large cylindrical body according to claim 3, wherein The bearing seat (400) comprises: The lower seat body (410) is provided with an extension plate, the top seat (530) is fixed on the bottom surface of the extension plate by bolt clamping, and the extension plate is provided with a round through hole corresponding to the through hole; The upper seat body (420) is fixed on the lower seat body (410) by bolt clamping, and a bearing mounting hole for mounting a bearing is formed between the upper seat body (420) and the lower seat body (410).

6. The polishing tool for the outer cylindrical surface of a large cylindrical body according to claim 1, wherein: The connecting part is a magnetic base with a control handle (300), and the magnetic base is installed inside the base (200), and the control handle (300) is arranged on the base (200).

7. The polishing tool for the outer cylindrical surface of a large cylindrical body according to claim 1, wherein: The bottom surface of the base (200) is an arc surface (210), and the curvature radius of the arc surface (210) is the same as that of the outer cylindrical surface of the cylindrical body (100).

8. The polishing tool for the outer cylindrical surface of a large cylindrical body according to claim 1, wherein: The power source is a pneumatic motor (700), and the pneumatic motor (700) is connected to a high-pressure gas source (720) through a hose (710).

9. The polishing tool for the outer cylindrical surface of a large cylindrical body according to claim 1, wherein: The connecting shaft is provided with a threaded hole at the end away from the transmission circular shaft (600), and further comprises a compression bolt (810) and a compression cover (820), the compression cover (820) is provided with a center hole, and the threaded segment of the compression bolt (810) passes through the center hole and the inner hole of the grinding wheel (800) in sequence and is screwed into the threaded hole.

10. A method of using a dressing for the lapping of the outer cylindrical surface of a large cylinder according to any one of claims 1-9, characterized in that, Comprise: Step 1: connect the base (200) to the outer cylindrical surface of the cylindrical body (100); Step 2: adjust the distance between the bearing seat (400) and the base (200) by using the adjusting mechanism (500), so that the distance between the central axis of the central circular shaft and the outer cylindrical surface of the cylindrical body (100) is the same as the radius of the grinding wheel (800); Step 3: according to the height of the hard point to be polished on the outer cylindrical surface of the cylindrical body (100), adjust the adjusting mechanism (500) again, so that the central circular shaft is away from the base (200) by a distance equal to the height of the hard point to be polished; Step 4: install the grinding wheel (800) on the connecting shaft, so that the grinding wheel (800) is in contact with the hard point to be polished; Step 5: start the power source to drive the central circular shaft to rotate the grinding wheel (800) and start polishing the hard point to be polished; Step 6: according to the polishing condition, adjust the adjusting mechanism (500) in real time to make the grinding wheel (800) polish the hard point to be polished until the polishing of the hard point to be polished is completed.

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