An automatic polishing device for finish machining of a sliding bearing inner ring surface

Abstract

This invention provides an automatic grinding device for the precision machining of the inner ring surface of a sliding bearing, relating to the field of rotary grinding technology. It includes a first component and a second component. The first component has multiple movable clamping members that clamp and fix the sliding bearing along its outer circumferential surface, and magnetic elements are fixedly mounted on the clamping members. The second component has outwardly sliding grinding elements on its side. Since the multiple grinding elements are movable, the contour formed by their outermost portions can vary. In this design, the grinding elements are attracted by the magnetic elements, giving them a radially outward force that causes their outer ends to abut against the inner wall of the sliding bearing. The outermost portions of the multiple grinding elements align with the inner ring surface of the sliding bearing, thereby achieving uniform grinding of the inner ring surface and improving the roundness accuracy of the inner ring surface after grinding.

Description

Technical Field

[0001] This invention relates to the field of rotary grinding technology, specifically to an automatic grinding device for precision machining of the inner ring surface of a sliding bearing. Background Technology

[0002] Sliding bearings are one of the key components supporting rotating bodies in mechanical equipment. Their geometric accuracy and surface quality directly affect the bearing's load-bearing capacity, friction performance, and rotational accuracy, playing a vital role in the overall reliability and service life of the machine. As mechanical equipment develops towards higher speeds and higher precision, the machining accuracy requirements for sliding bearings are increasing.

[0003] Precision grinding of the inner ring surface of a sliding bearing is a key process in bearing manufacturing. Its purpose is to remove machining marks left by previous processes and obtain a precise geometric shape and a smooth contact surface.

[0004] Currently, the main methods for mechanically grinding the inner ring surface of sliding bearings in the industry include: 1) driving the inner ring of the bearing to rotate while the grinding component is fixedly positioned at the center of the inner ring; 2) driving the grinding component to rotate while clamping the bearing and fixing it on the outside of the grinding component; 3) placing the grinding component at the center of the inner ring and simultaneously driving both components to rotate at different speeds in opposite or the same direction. Regardless of the method, it is necessary to keep the outer contour circle of the grinding component concentric with the inner ring of the bearing. However, in actual grinding, maintaining concentricity is very difficult, especially after a period of grinding. Due to uneven grinding, the outer contour circle of the grinding component and its own center will dynamically change. When the driving rotation axis is not coaxial with the grinding tool axis, the contact pressure between the grinding head and the inner wall of the inner ring is uneven in various circumferential directions—the cutting depth is large near the axis and small or even non-contact in directions far from the axis, leading to ellipticity deviations, taper, or waviness on the inner ring surface, and in severe cases, resulting in scrap. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic grinding device for the precision machining of the inner ring surface of a sliding bearing. This device solves the problem that in the existing grinding process of the inner ring surface of a sliding bearing, it is difficult for the driving rotating component and the grinding component to maintain coaxiality, resulting in uneven grinding thickness and poor roundness accuracy of the inner ring surface.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automated grinding device for finishing the inner ring surface of a sliding bearing includes:

[0008] The first component has multiple movable clamping members, which clamp and fix the sliding bearing along the outer peripheral surface of the sliding bearing, and magnetic elements are fixedly provided on the clamping members; when the multiple clamping members clamp and fix the sliding bearing, the distribution centers of the multiple clamping members and the distribution centers of the multiple magnetic elements coincide with the center of the sliding bearing.

[0009] The second component is located inside the fixed sliding bearing or can be moved to the inside of the fixed sliding bearing, and the axial direction of the second component is parallel to the axis of the fixed sliding bearing; the second component is annular, and its side is provided with a grinding element that can slide outward, and the grinding surface of the grinding element faces the inner wall of the fixed sliding bearing.

[0010] The first component drives the clamping member, the magnetic member, and the fixed sliding bearing to rotate. The magnetic member is used to magnetically attract the grinding member, so that the grinding surface of the grinding member contacts the inner wall of the sliding bearing.

[0011] Preferably, the first component includes:

[0012] Fixed-configuration driver;

[0013] A three-jaw chuck is installed at the output end of the drive unit, and the jaws of the three-jaw chuck constitute a plurality of the clamping elements;

[0014] Magnetic components are fixedly installed on the jaws of the three-jaw chuck.

[0015] Preferably, the three-jaw chuck is a pneumatic three-jaw chuck, which specifically includes:

[0016] The main body has a piston chamber at its first end and a drive chamber at its second end, with a connecting hole between the piston chamber and the drive chamber.

[0017] A piston assembly that mates with the piston chamber to form a piston structure; the piston rod of the piston assembly passes through the communicating hole, extends into the interior of the drive chamber, and is fixedly connected to a drive disc;

[0018] The driving cavity has several movable parts, and the side wall of the driving cavity is provided with a second sliding groove that is the same number as the number of movable parts and is radially along the main body. The movable parts are slidably disposed inside the second sliding groove and correspond one to one. The movable parts are U-shaped, with one side being a connecting section and the other side being an inclined section. The inclined section is slidably engaged with the driving disk. When the driving disk moves axially along the main body, it drives the movable parts to move radially along the main body.

[0019] The pressure plate component includes an integrally formed ring body and a pressure rod with the same number as the second sliding groove. The ring body is located inside the drive cavity, the pressure rod is located inside the second sliding groove, and the end of the pressure rod abuts against the transverse part of the movable component to restrict the pressure plate component from moving axially along the main body component.

[0020] A pressure cap is fixedly connected to the inner side of the drive cavity and is located on the outer side of the pressure plate component;

[0021] A claw component is fixedly connected to the end of the connecting section of the movable component, and a magnetic component is fixedly connected to the claw component.

[0022] The tail end component is fixedly installed at the piston chamber end of the main body component to seal the piston chamber, and the tail end component is fixedly connected to the output end of the drive component.

[0023] The gas distribution component includes a first annular body rotated and sealed on the outside of the main body. The inner side of the first annular body and the outer side of the main body form a first annular cavity and a second annular cavity. The piston component divides the piston cavity into a front chamber and a rear chamber. The outer side of the first annular body is provided with an air pipe interface that communicates with the first annular cavity and the second annular cavity respectively. The main body is provided with a first air passage that communicates with the front chamber and the second annular cavity and a second air passage that communicates with the rear chamber and the first annular cavity. A positioning frame is fixedly connected to the outer side of the first annular body.

[0024] A fixed plate frame is provided, and a connecting column is provided on the plate frame. The positioning frame is fixedly connected to the connecting column.

[0025] Preferably, the magnetic component includes: an outer frame component, the outer frame component being arc-shaped, the outer frame component being fixedly connected to the outside of the claw component, and a permanent magnet being fixedly connected to the inner side of the outer frame component.

[0026] Preferably, the second component includes:

[0027] The second annular body has a mounting plate fixedly connected to its bottom. Multiple sliding holes are provided on the side of the second annular body. A grinding component along the radial direction of the second annular body is slidably arranged on the inner side of the sliding holes. A limiting post is fixedly connected to the center of the mounting plate, which is located inside the second annular body.

[0028] The grinding component includes: a main body, one end of which is fixedly connected to a limiting part located inside the second annular body.

[0029] Preferably, it further includes: a first lifting member and a first slot box, wherein the second component is fixedly installed on the top telescopic end of the first lifting member, and the first lifting member is fixedly disposed inside the first slot box;

[0030] The first lifting component, the first slot box, and the second component constitute the grinding assembly.

[0031] Preferably, it further includes: a movable component, a base platform, and a side platform, wherein the first slot box is fixedly installed on the moving end of the movable component, and the first component is installed on the side platform;

[0032] The moving component includes: a moving module and a support plate. The moving module is mounted on the base platform, and the support plate is fixedly mounted on the moving end of the moving module. A first sliding groove is provided on the base platform, and the support plate slides in conjunction with the first sliding groove.

[0033] Preferably, it further includes: a workpiece feeding assembly, which is fixedly mounted on the support plate.

[0034] Preferably, the workpiece feeding assembly includes:

[0035] The second slot is fixedly connected to the support plate. A second lifting component is fixedly installed at the bottom of the second slot, and a workpiece table is fixedly installed at the top telescopic end of the second lifting component.

[0036] Preferably, the workpiece stage is frustum-shaped.

[0037] This invention provides an automatic grinding device for the precision machining of the inner ring surface of a sliding bearing. It has the following beneficial effects:

[0038] 1. In this invention, a grinding element that can slide outward is provided on the side of the second component. Since multiple grinding elements can move, the contour formed by the outermost part of these multiple grinding elements can change. In this design, the grinding element is attracted by a magnetic element and has a force that moves outward in the radial direction, so that its outer end abuts against the inner wall of the sliding bearing. Thus, the contour formed by the outermost part of these multiple grinding elements is the shape of the inner wall of the sliding bearing, that is, it forms a circle that is consistent with the inner ring surface of the sliding bearing, thereby achieving uniform grinding of the inner ring surface of the sliding bearing and improving the roundness accuracy of the inner ring surface of the sliding bearing after grinding.

[0039] 2. In this invention, multiple grinding parts are attracted by a magnetic component, which has a radial outward force, so that its outer end always abuts against the inner wall of the sliding bearing. When the wear of the multiple grinding parts is different, the shape formed by the outer ends of the multiple grinding parts is still consistent with the inner wall of the sliding bearing, which can avoid frequent replacement of grinding parts, reduce the consumption of grinding parts, and reduce grinding costs.

[0040] 3. In this invention, the magnetic components are fixed on the clamping components, which makes it easier to form a distribution center of multiple clamping components and a distribution center of multiple magnetic components that coincide with the center of the sliding bearing (three-center coincidence). When the end of the grinding component abuts against the inner wall of the sliding bearing, the distance between its end and the nearest magnetic component is constant, thereby achieving a consistent pressing force of the grinding component on the inner wall of the sliding bearing, further improving the roundness accuracy of the grinding. Attached Figure Description

[0041] Figure 1 This is a perspective view of an automatic grinding device for precision machining of the inner ring surface of a sliding bearing, as proposed in this invention.

[0042] Figure 2 This is a front view of an automatic grinding device for finishing the inner ring surface of a sliding bearing, as proposed in this invention.

[0043] Figure 3 This is a top view of an automatic grinding device for finishing the inner ring surface of a sliding bearing, as proposed in this invention.

[0044] Figure 4 This is a side view of an automatic grinding device for finishing the inner ring surface of a sliding bearing, as proposed in this invention.

[0045] Figure 5 This is a perspective view of the side platform, drive unit, three-jaw chuck, and base platform of an automatic grinding device for precision machining of the inner ring surface of a sliding bearing proposed in this invention.

[0046] Figure 6 This is a cross-sectional view of the three-jaw chuck of an automatic grinding device for finishing the inner ring surface of a sliding bearing, as proposed in this invention.

[0047] Figure 7 A schematic diagram (a) of the bottom end of the three-jaw chuck of the automatic grinding device for finishing the inner ring surface of a sliding bearing proposed in this invention.

[0048] Figure 8 This is a schematic diagram (II) of the bottom end of the three-jaw chuck of the automatic grinding device for precision machining of the inner ring surface of a sliding bearing proposed in this invention.

[0049] Figure 9 This is a schematic diagram of the engagement between the drive disc and the moving parts of an automatic grinding device for finishing the inner ring surface of a sliding bearing, as proposed in this invention.

[0050] Figure 10 This is a schematic diagram of the workpiece feeding assembly and the grinding assembly of an automatic grinding device for precision machining of the inner ring surface of a sliding bearing, as proposed in this invention.

[0051] Figure 11 This is a perspective view of the second component of an automatic grinding device for precision machining of the inner ring surface of a sliding bearing, as proposed in this invention.

[0052] The components include: 1. Side platform; 2. Drive unit; 3. Three-jaw chuck; 4. Base platform; 5. Moving component; 6. Workpiece loading assembly; 7. Grinding assembly; 301. Jaw component; 302. Magnetic component; 303. Plate frame; 304. Connecting column; 305. First annular body; 306. Positioning frame; 307. Main body; 308. First annular cavity; 309. Second annular cavity; 501. Moving module; 502. First sliding groove; 503. Bearing plate; 601. Second slot box; 602. Second lifting component; 603. Workpiece table; 701. First slot box; 702. First lifting component; 703. 3010. Second component; 3011. Piston chamber; 3012. Piston component; 3013. Drive chamber; 3014. Second sliding groove; 3015. Drive disc; 3016. Movable component; 3017. Pressure plate component; 3018. Pressure cap; 3021. Tail end component; 3022. Permanent magnet; 3023. Outer frame component; 30151. Connecting section; 30152. Inclined section; 30161. Ring body; 30162. Pressure rod; 7031. Mounting disc; 7032. Second ring body; 7033. Sliding hole; 7034. Main body; 7035. Restricting part; 7036. Restricting post. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] Example 1:

[0055] like Figures 1-11As shown, this embodiment of the invention provides an automatic grinding device for finishing the inner ring surface of a sliding bearing. This device automatically finishes and grinds the inner ring surface of the sliding bearing, ensuring that the grinding workpiece and the bearing inner ring remain concentric and that the contact pressure is uniform during the grinding process. Specifically, it includes a first component and a second component 703. The first component has multiple movable clamping members that clamp and fix the sliding bearing along its outer circumferential surface. For example, it may have two clamping members that clamp and fix the sliding bearing inwards, or it may have two or more clamping members arranged in a circular array. The sliding bearing is clamped and fixed by a series of clamping elements that move radially along the circumference. Magnetic elements 302 are fixedly mounted on the clamping elements, with at least two magnetic elements 302 and no more than the number of clamping elements. When multiple clamping elements clamp and fix the sliding bearing, the distribution centers of the clamping elements and the distribution centers of the magnetic elements 302 coincide with the center of the sliding bearing. Because the magnetic elements 302 are fixed to the clamping elements and move synchronously, their distribution centers always remain aligned. Using multiple clamping elements to clamp and fix the sliding bearing along its outer circumference allows for multiple... The distribution centers of the clamping components coincide with the center of the sliding bearing. Therefore, in the structure designed above, it is possible to achieve good coincidence (three-center coincidence) between the distribution centers of the multiple clamping components and the distribution centers of the multiple magnetic components 302 and the center of the sliding bearing. The second component 703 is located inside the fixed sliding bearing or can be moved to the inside of the fixed sliding bearing, and the axial direction of the second component 703 is parallel to the axis of the fixed sliding bearing. For example, if the sliding bearing is clamped and fixed in a vertical state, its corresponding axis is a vertical line, and the axis of the second component 703 is also designed to be vertical. The first component drives the clamping component, the magnetic component 302, and the fixed sliding bearing to rotate. The magnetic component 302 is used to magnetically attract the grinding component, so that the grinding surface of the grinding component contacts the inner wall of the sliding bearing. The first component drives the clamping component, the magnetic component 302, and the fixed sliding bearing to rotate. The magnetic component 302 is used to magnetically attract the grinding component, so that the grinding surface of the grinding component contacts the inner wall of the sliding bearing. The sliding bearing rotates, and the end of the grinding component rubs against the inner wall of the sliding bearing to achieve the grinding effect.

[0056] Understandably, the second component 703 has outwardly sliding grinding elements on its side. Since multiple grinding elements can move, the contour formed by the outermost parts of these multiple grinding elements can change. In this design, the grinding elements are attracted by the magnetic element 302, which has a radially outward force, causing its outer end to abut against the inner wall of the sliding bearing. Under such action, the contour formed by the outermost parts of the multiple grinding elements is the shape of the inner wall of the sliding bearing, that is, it forms a circle that is consistent with the inner ring surface of the sliding bearing, thereby achieving uniform grinding of the inner ring surface of the sliding bearing and improving the roundness accuracy of the inner ring surface of the sliding bearing after grinding.

[0057] Multiple grinding parts can be attracted by the magnetic element 302, which has a radially outward force, so that its outer end always abuts against the inner wall of the sliding bearing. When the wear of multiple grinding parts is different, the shape formed by the outer ends of the multiple grinding parts is still consistent with the inner wall of the sliding bearing. Under this effect, frequent replacement of grinding parts can be avoided, the consumption of grinding parts will be reduced, and the grinding cost will be reduced. Fixing the magnetic element 302 on the clamping part makes it easier to form the distribution center of multiple clamping parts and the distribution center of multiple magnetic elements 302 all coincide with the center of the sliding bearing (three-center coincidence). When the end of the grinding part abuts against the inner wall of the sliding bearing, the distance between its end and the nearest magnetic element 302 is constant, so that the pressing force of the grinding part on the inner wall of the sliding bearing is consistent, further improving the roundness accuracy of grinding.

[0058] In one embodiment, the first component includes: a fixedly mounted drive unit 2 and a three-jaw chuck 3 mounted on the output end of the drive unit 2.

[0059] The driving component 2 consists of a motor, a reducer, a transmission system, and other structures, and is used to drive the three-jaw chuck 3 to rotate. The jaws of the three-jaw chuck 3 are used to clamp and fix the sliding bearing (the jaws of the three-jaw chuck 3 constitute multiple clamping components). Generally, the jaws of the three-jaw chuck 3 clamp and fix synchronously towards the center, and this center coincides with the rotation center of the three-jaw chuck 3. A magnetic component 302 is fixedly installed on the jaws of the three-jaw chuck 3, and the magnetic component 302 moves synchronously with the jaws of the three-jaw chuck 3.

[0060] Understandably, the operator / robotic arm automatically places the sliding bearing in the center of the jaws of the three-jaw chuck 3, and operates the jaws of the three-jaw chuck 3 to clamp and fix the sliding bearing towards the center. The magnetic component 302 also clamps and fixes the sliding bearing towards the center synchronously with the jaws of the three-jaw chuck 3. Then, the drive component 2 drives the three-jaw chuck 3, the magnetic component 302, and the sliding bearing to rotate synchronously.

[0061] In one embodiment, in order to further improve the automation of the grinding process, the three-jaw chuck 3 is selected as a pneumatic three-jaw chuck, which specifically includes: a main body 307, a piston 3011, a drive plate 3014, a moving part 3015, a pressure plate 3016, a pressure cover 3017, a jaw 301, a tail end part 3018, an air distribution part, and a fixedly installed plate frame 303.

[0062] The main body 307 is cylindrical, with a piston cavity 3010 at its first end and a drive cavity 3012 at its second end. A connecting hole is provided between the piston cavity 3010 and the drive cavity 3012. A piston 3011 is disposed inside the piston cavity 3010 and cooperates with the piston cavity 3010 to form a piston structure. The piston rod of the piston 3011 passes through the connecting hole, extends into the drive cavity 3012, and is fixedly connected to a drive disc 3014. The piston rod of the piston 3011 and the connecting hole also have a sealed sliding fit structure. The piston 3011 divides the piston cavity 3010 into... The front chamber and rear chamber are filled with gas, which is used to drive the piston 3011 to move in two directions. A second sliding groove 3013, the same number as the movable parts 3015, is formed on the side wall of the drive chamber 3012 and runs radially along the main body 307. The movable parts 3015 are slidably disposed inside the second sliding grooves 3013, and each movable part 3015 corresponds one-to-one with the second sliding groove 3013. The movable parts 3015 slide radially along the main body 307. The movable parts 3015 are U-shaped, with one side being a connecting section 30151 and the other side being an inclined section 30152. The inclined section 30152 is connected to the drive disc 3011. 14. Sliding fit: When the drive disc 3014 moves axially along the main body 307 (the drive disc 3014 and the inclined section 30152 move relative to each other axially along the piston 3011), the drive movable part 3015 moves radially along the main body 307; the pressure plate part 3016 includes an integrally formed ring 30161 and pressure rods 30162 in the same number as the second sliding grooves 3013. The ring 30161 is located inside the drive cavity 3012, and the pressure rods 30162 are located inside the second sliding grooves 3013. The end of the pressure rods 30162 abuts against the transverse part of the movable part 3015 to limit the pressure plate part 3016 from moving along the main body. The axial movement of component 307 ensures that when the drive disk 3014 is driven by the piston rod of piston component 3011, the movable component 3015 will not move, resulting in the relative movement of the inclined section 30152 of the movable component 3015 and the drive disk 3014 along the axial direction of piston component 3011; the pressure cap 3017 is fixedly connected to the inner side of drive cavity 3012, and the pressure cap 3017 is located on the outer side of pressure plate component 3016, and the pressure cap 3017 is used to limit the position of pressure plate component 3016; the claw component 301 is fixedly connected to the end of the connecting section 30151 of movable component 3015, and a magnetic component 302 is fixedly connected to the claw component 301;The tail end piece 3018 is fixedly installed at the piston chamber 3010 end of the main body 307 to seal the piston chamber 3010. The tail end piece 3018 is also fixedly connected to the output end of the drive component 2 to transmit the rotation of the drive component 2, thereby causing the pneumatic three-jaw chuck to rotate. The air distribution component includes a first annular body 305 rotated and sealed on the outside of the main body 307. The inner side of the first annular body 305 and the outer side of the main body 307 form a first annular cavity 308 and a second annular cavity 309. The piston component 3011 divides the piston chamber 3010 into a front chamber and a rear chamber. The outer side of the first annular body 305... The side is provided with air pipe interfaces that communicate with the first annular cavity 308 and the second annular cavity 309 respectively. The main body 307 has a first air passage connecting the anterior chamber to the second annular cavity 309 and a second air passage connecting the rear chamber to the first annular cavity 308. A positioning frame 306 is fixedly connected to the outer side of the first annular body 305. A connecting post 304 is provided on the plate frame 303, and the positioning frame 306 is fixedly connected to the connecting post 304. An air pipe is connected to the air distribution component, which does not rotate with the main body 307. Air supply can be achieved by utilizing the first annular cavity 308 and the second annular cavity 309 formed between the two.

[0063] It is understandable that an external air source supplies air to the gas distribution component, which then enters the front or rear chamber of the piston chamber 3010 through the first annular cavity 308 or the second annular cavity 309. This drives the piston component 3011 to move axially relative to the main body component 307. The piston rod of the piston component 3011 drives the disk 3014 to move, causing the inclined section 30152 of the movable component 3015 to move relative to the drive disk 3014 along the axial direction of the piston component 3011. This drives the movable component 3015 to move radially along the main body component 307. The movable component 3015 drives the claw component 301 and the magnetic component 302 to move synchronously, thereby achieving the fixed clamping of the sliding bearing. Furthermore, the distribution centers of the multiple claw components 301 and the multiple magnetic components 302 coincide with the center of the sliding bearing (three-center coincidence).

[0064] In one embodiment, the magnetic component 302 includes an outer frame 3022, which is arc-shaped and is fixedly connected to the outside of the claw component 301. A permanent magnet 3021 is fixedly connected to the inner side of the outer frame 3022.

[0065] The outer frame 3022 is used to connect the outer side of the claw 301 and provide a position for the connection of the permanent magnet 3021. For example, multiple strip-shaped permanent magnets 3021 are distributed circumferentially along the main body 307, and the length direction of the permanent magnets 3021 is along the axial direction of the main body 307.

[0066] In one embodiment, the second component 703 includes: a second annular body 7032, which is a hollow cylinder or a hollow regular polygon. A mounting plate 7031 is fixedly connected to the bottom of the second annular body 7032. The mounting plate 7031 is equivalent to a flange, which facilitates its installation on the first lifting component 702. A plurality of sliding holes 7033 are provided on the side of the second annular body 7032. A grinding component is slidably arranged on the inner side of the sliding hole 7033 along the radial direction of the second annular body 7032. The grinding component is made by mixing grinding particles and adhesive and then molding it. A limiting post 7036 is fixedly connected to the center of the mounting plate 7031 and located inside the second annular body 7032. The limiting post 7036 is used to limit the grinding component from sliding inward and disengaging from the sliding hole 7033.

[0067] The grinding component includes: a main body 7034, one end of which is located inside the second annular body 7032 and is fixedly connected to a limiting part 7035, which is used to limit the grinding component from sliding outward and disengaging from the sliding hole 7033.

[0068] The grinding part is made by using an internal metal skeleton (the limiting part 7035 is a metal part, and a part inside the main body 7034 that is fixedly connected to the limiting part 7035 is also a metal part), and then combining the grinding particles and the adhesive to form a molding material through a molding process.

[0069] In one embodiment, the limiting post 7036 is also a magnetic body, and its magnetism should be less than that of the magnetic force of the magnetic member 302. When the magnetic member 302 leaves, the limiting post 7036 can attract each grinding member closer to the center position.

[0070] In one embodiment, a first lifting member 702 and a first slot box 701 are also designed, and a second component 703 is fixedly installed on the top telescopic end of the first lifting member 702. The first lifting member 702 is fixedly disposed inside the first slot box 701. The first lifting member 702, the first slot box 701, and the second component 703 constitute the polishing assembly 7.

[0071] It is understandable that polishing coolant may be sprayed during the polishing process. The first slot 701 is used to collect the polishing coolant. A water guide pipe can be designed on the side of the first slot 701 to discharge the polishing coolant collected in the first slot 701. The first lifting component 702 is used to drive the second component 703 to rise and fall, so that it forms a certain distance from the first component, which facilitates the subsequent clamping of the sliding bearing by the first component.

[0072] In one embodiment, a movable component 5, a base 4, and a side platform 1 are also designed. The first slot box 701 is fixedly installed on the moving end of the movable component 5, and the first component is installed on the side platform 1.

[0073] The movable component 5 includes: a movable module 501 and a support plate 503. The movable module 501 is mounted on the base 4, and the support plate 503 is fixedly mounted on the moving end of the movable module 501. A first sliding groove 502 is provided on the base 4, and the support plate 503 slides in cooperation with the first sliding groove 502.

[0074] It is understandable that the moving module 501 manipulates the carrier plate 503 to move, thereby driving the first slot box 701 to move, and then driving the first lifting member 702 and the second component 703. It can manipulate the second component 703 to be located below the first component, and then the first lifting member 702 drives the second component 703 to move upward and enter the inner side of the sliding bearing.

[0075] In one embodiment, a workpiece feeding assembly 6 is also designed, which is fixedly installed on the support plate 503.

[0076] The moving module 501 manipulates the carrier plate 503 to move, thereby driving the feeding component 6 and the grinding component 7 to move synchronously, so that one of the feeding component 6 and the grinding component 7 cooperates with the first component to realize the automatic switching of feeding and grinding.

[0077] In one embodiment, the workpiece loading assembly 6 includes: a second slot box 601, the second slot box 601 being fixedly connected to the support plate 503, a second lifting member 602 being fixedly installed at the bottom inner part of the second slot box 601, and a workpiece table 603 being fixedly installed at the top telescopic end of the second lifting member 602, the workpiece table 603 being frustum-shaped.

[0078] The sliding bearing can be gripped by a robot and placed on a frustum-shaped workpiece stage 603. Then, the moving module 501 manipulates the carrier plate 503 to move, so that the workpiece stage 603 of the workpiece loading assembly 6 is aligned with the bottom of the first component. Then, the second lifting component 602 drives the workpiece stage 603 and the sliding bearing placed on it into the inner side of the clamping component, where the clamping component clamps and fixes the sliding bearing. Then, the second lifting component 602 drives the workpiece stage 603 to fall back, and the moving module 501 manipulates the carrier plate 503 to move, so that the grinding assembly 7 cooperates with the first component to complete the grinding.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic grinding device for precision machining of the inner ring surface of a sliding bearing, characterized in that, include: The first component has multiple movable clamping members, which clamp and fix the sliding bearing along the outer peripheral surface of the sliding bearing, and magnetic elements (302) are fixedly provided on the clamping members; when the multiple clamping members clamp and fix the sliding bearing, the distribution center of the multiple clamping members and the distribution center of the multiple magnetic elements (302) coincide with the center of the sliding bearing. The second component (703) is located inside the fixed sliding bearing or can be moved to the inside of the fixed sliding bearing, and the axial direction of the second component (703) is parallel to the axis of the fixed sliding bearing; the second component (703) is annular, and its side is provided with a grinding element that can slide outward, and the grinding surface of the grinding element faces the inner wall of the fixed sliding bearing; The first component drives the clamping member, the magnetic member (302) and the fixed sliding bearing to rotate. The magnetic member (302) is used to magnetically attract the grinding member so that the grinding surface of the grinding member contacts the inner wall of the sliding bearing.

2. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 1, characterized in that, The first component includes: Fixed drive unit (2); A three-jaw chuck (3) is installed at the output end of the drive unit (2), and the jaws of the three-jaw chuck (3) constitute a plurality of the clamping members; The three-jaw chuck (3) has magnetic components (302) fixedly installed on its jaws.

3. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 2, characterized in that, The three-jaw chuck (3) is a pneumatic three-jaw chuck, which specifically includes: The main body (307) has a piston chamber (3010) at its first end and a drive chamber (3012) at its second end. A connecting hole is provided between the piston chamber (3010) and the drive chamber (3012). A piston component (3011) is fitted with a piston chamber (3010) to form a piston structure; the piston rod of the piston component (3011) passes through the connecting hole, extends into the interior of the drive chamber (3012), and is fixedly connected to a drive disc (3014). The driving cavity (3012) has a number of movable parts (3015) and a second sliding groove (3013) on its side wall, which is the same number as the number of movable parts (3015) and is radially along the main body (307). The movable parts (3015) are slidably disposed inside the second sliding groove (3013) and correspond one to one. The movable part (3015) is U-shaped, with a connecting section (30151) on one side and an inclined section (30152) on the other side. The inclined section (30152) is slidably engaged with the driving disk (3014). When the driving disk (3014) moves axially along the main body (307), it drives the movable part (3015) to move radially along the main body (307). The pressure plate component (3016) includes an integrally formed ring body (30161) and pressure rods (30162) in the same number as the second sliding grooves (3013). The ring body (30161) is located inside the drive cavity (3012), and the pressure rods (30162) are located inside the second sliding grooves (3013). The end of the pressure rods (30162) abuts against the transverse part of the movable component (3015) to restrict the pressure plate component (3016) from moving axially along the main body component (307). A pressure cap (3017) is fixedly connected to the inner side of the drive cavity (3012) and the pressure cap (3017) is located on the outer side of the pressure plate (3016); A claw component (301) is fixedly connected to the end of the connecting section (30151) of the movable component (3015), and a magnetic component (302) is fixedly connected to the claw component (301). Tail end piece (3018), the tail end piece (3018) is fixedly installed at the piston chamber (3010) end of the main body piece (307) for sealing the piston chamber (3010), and the tail end piece (3018) is fixedly connected to the output end of the drive piece (2); The gas distribution component includes a first annular body (305) with a rotary seal installed on the outside of the main body (307). The inner side of the first annular body (305) and the outer side of the main body (307) form a first annular cavity (308) and a second annular cavity (309). The piston component (3011) divides the piston cavity (3010) into a front chamber and a rear chamber. The outer side of the first annular body (305) is provided with an air pipe interface that communicates with the first annular cavity (308) and the second annular cavity (309) respectively. The main body (307) is provided with a first air passage that communicates with the front chamber and the second annular cavity (309) and a second air passage that communicates with the rear chamber and the first annular cavity (308). A positioning frame (306) is fixedly connected to the outer side of the first annular body (305). A fixed plate frame (303) is provided, and a connecting column (304) is provided on the plate frame (303). The positioning frame (306) is fixedly connected to the connecting column (304).

4. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 3, characterized in that, The magnetic component (302) includes: an outer frame (3022), which is arc-shaped and is fixedly connected to the outside of the claw component (301), and a permanent magnet (3021) is fixedly connected to the inside of the outer frame (3022).

5. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 1, characterized in that, The second component (703) includes: The second annular body (7032) has a mounting plate (7031) fixedly connected to its bottom. The side of the second annular body (7032) has multiple sliding holes (7033). A grinding element is slidably arranged on the inner side of the sliding hole (7033) along the radial direction of the second annular body (7032). A limiting post (7036) is fixedly connected to the center of the mounting plate (7031) and inside the second annular body (7032). The grinding component includes: a main body (7034), one end of which is located inside the second annular body (7032) and is fixedly connected to a limiting part (7035).

6. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 5, characterized in that, Also includes: The first lifting component (702), the first slot box (701), and the second component (703) are fixedly installed on the top telescopic end of the first lifting component (702), and the first lifting component (702) is fixedly installed inside the first slot box (701); The first lifting component (702), the first slot box (701), and the second component (703) constitute the grinding assembly (7).

7. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 6, characterized in that, Also includes: The moving part (5), the base (4), and the side platform (1) are provided. The first slot box (701) is fixedly installed on the moving end of the moving part (5), and the first component is installed on the side platform (1). The moving part (5) includes: a moving module (501) and a support plate (503). The moving module (501) is mounted on the base (4), and the support plate (503) is fixedly mounted on the moving end of the moving module (501). A first sliding groove (502) is provided on the base (4), and the support plate (503) slides in cooperation with the first sliding groove (502).

8. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 7, characterized in that, Also includes: The workpiece loading assembly (6) is fixedly installed on the support plate (503).

9. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 8, characterized in that, The workpiece loading assembly (6) includes: The second slot box (601) is fixedly connected to the support plate (503). The second lifting component (602) is fixedly installed at the bottom of the second slot box (601), and the workpiece table (603) is fixedly installed at the top telescopic end of the second lifting component (602).

10. The automatic grinding device for precision machining of the inner ring surface of a sliding bearing according to claim 9, characterized in that: The workpiece stage (603) is in the shape of a frustum.

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