A high-precision grinding apparatus and grinding method for the inner bore of graphite bearings

Abstract

This invention discloses a high-precision graphite bearing inner hole grinding device and grinding method, relating to the field of grinding machine tool technology. It includes a mounting frame with a triggering mechanism at one end and a transmission mechanism inside. A connecting rod is slidably connected to the side of the mounting frame away from the triggering mechanism, and a support frame is fixedly connected to the end of the connecting rod away from the mounting frame. A collecting mechanism is inside the support frame, and a connecting mechanism is provided on the outer surface of the support frame. The collecting mesh in the collecting mechanism is made of wire mesh, with magnetic blocks fixed at the mesh knots. Half of the magnetic blocks are positive and the other half are negative. When fragments splash and impact the collecting mesh, the mesh bends under force, and the magnetic blocks on both sides attract and adhere to each other, quickly enveloping the fragments and preventing them from spreading. This achieves the effect of collecting the splashed fragments, avoiding secondary damage to the bearing interior or injury to workers.

Description

Technical Field

[0001] This invention relates to the field of grinding machine tool technology, specifically to a high-precision grinding device and grinding method for the inner hole of graphite bearings. Background Technology

[0002] The ultra-precision bearing R&D project aims to overcome key technical challenges in ultra-precision bearings for high-end manufacturing, achieving independent R&D and industrialization of high-precision, high-stability, and long-life ultra-precision bearings. Centered on impregnated graphite bearing technology, the project delves into material formulations and preparation processes to further optimize self-lubrication and corrosion resistance. Simultaneously, it combines advanced technologies such as atomic layer deposition and ultra-precision machining to precisely control the surface quality and structural accuracy of the bearings. To improve bearing precision, the inner and outer bores need to be finely polished. This requires the use of polishing rollers with varying roughness levels. Existing polishing rollers are mostly made of corundum, characterized by high hardness and low toughness. During polishing, they can shatter due to abrasive impact and high temperatures, and the fragments can easily fly off, potentially causing secondary scratches on the bearing's inner bore, affecting machining accuracy, damaging other equipment components, and even posing safety hazards.

[0003] Traditional devices lack an effective instant braking mechanism. When the grinding roller breaks, the power transmission cannot be cut off quickly, causing the broken grinding roller to continue rotating, which aggravates the damage. Furthermore, the device cannot quickly collect the flying fragments, causing secondary damage to the workpiece. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision grinding device for the inner hole of graphite bearings, which collects broken grinding rollers and stops the rotation of the grinding rollers to avoid secondary damage to the bearings.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-precision graphite bearing inner hole grinding device, comprising a mounting frame, a triggering mechanism at the end of the mounting frame, a transmission mechanism inside the mounting frame, a connecting rod slidably connected to the side of the end of the mounting frame away from the triggering mechanism, a support frame fixedly connected to the end of the connecting rod away from the mounting frame, a collecting mechanism inside the support frame, a connecting mechanism on the outer surface of the support frame, and a contact roller rotatably connected to the end of the support frame;

[0006] The collecting mechanism includes a rope winding shaft, an internal torsion spring, a collecting net wound around the surface of the rope winding shaft, a rope winding groove on the side of the support frame near the rope winding shaft, a magnetic block fixedly connected inside the collecting net, a connecting rope fixedly connected to the side of the collecting net, and a winding shaft rotatably connected to the end of the connecting rope away from the collecting net.

[0007] Preferably, the mounting bracket is rotatably connected to an outer rotating shaft, and an outer connecting shaft is fixedly connected to the end of the outer rotating shaft. An inner connecting shaft is engaged with the end of the outer connecting shaft away from the outer rotating shaft. An inner rotating shaft is fixedly connected to the end of the inner connecting shaft away from the outer connecting shaft. A grinding roller is fixedly connected to the end of the inner rotating shaft away from the inner connecting shaft. A bearing is movably connected to the outer surface of the grinding roller.

[0008] The triggering mechanism includes a sliding groove, a pressure block is slidably connected inside the sliding groove, a trigger rod is fixedly connected to the top of the pressure block, a limit block is slidably connected inside the pressure block, a first spring is fixedly connected to the upper surface of the limit block, a second spring is fixedly connected to the side wall of the pressure block, a pressure switch is fixedly connected to the bottom of the sliding groove, an elastic sheet is fixedly connected to the top of the pressure switch, and a roller is rotatably connected to the end of the trigger rod away from the pressure block.

[0009] Preferably, the transmission mechanism includes a square groove, a slider is slidably connected inside the square groove, an electromagnetic telescopic rod is fixedly connected to the upper surface of the slider, and a connecting block is rotatably connected to the side wall of the slider.

[0010] Preferably, the connecting mechanism includes a slide rod, a limit plate is fixedly connected to the end of the slide rod, a support plate is slidably connected to the surface of the slide rod, a movable groove is formed on the surface of the support plate near the slide rod, a locking block is slidably connected inside the movable groove, and a No. 3 spring is fixedly connected to the side of the locking block near the bottom of the movable groove.

[0011] Preferably, the outer rotating shaft is fixedly connected to the output shaft of the drive motor required for grinding, and the end faces of the outer connecting shaft and the inner connecting shaft are provided with tooth grooves, the outer connecting shaft and the inner connecting shaft mesh with each other, and the grinding roller is attached to the inner surface of the bearing.

[0012] Preferably, the roller is attached to the surface of the inner rotating shaft, a limiting groove is formed at the bottom of the sliding groove, the limiting block is engaged inside the limiting groove, the elastic sheet is attached to the bottom of the sliding groove, and the elastic sheet protrudes upward.

[0013] Preferably, the mounting bracket has a power supply inside, one end of the pressure switch is connected to the power supply, and the other end is connected to the electromagnetic telescopic rod through a wire.

[0014] Preferably, the mounting bracket consists of two layers, an inner and an outer layer, which are rotatably connected. The outer connecting shaft is fixedly connected to the surface of the outer layer of the mounting bracket, the square groove is formed on the inner surface of the inner layer of the mounting bracket, and the connecting block is fixedly connected to the surface of the inner connecting shaft.

[0015] Preferably, the collecting net is a wire mesh, and the magnetic block is fixedly connected to the knot of the wire mesh. The magnetic block on one half of the surface of the collecting net is the positive pole facing outward, and the magnetic block on the other half of the surface is the negative pole. The roller is fixedly connected to the side wall of the support frame.

[0016] A filtration method for a high-precision graphite bearing inner hole grinding device includes the following steps:

[0017] Step 1: Clamp the parts to be processed on the grinding station of the machine tool. First, rough machining is performed. During rough machining, excess internal material is removed, and the surface shape and size of the material are changed to eliminate internal stress. At the same time, a hammering method is used to lightly hammer the material to remove stress and deform it twice. Then, semi-finish machining is performed. Periodic external force is applied to the workpiece to make it resonate. Finally, finish machining is performed. During finish machining, the flatness, parallelism, roundness and cylindricity of the product are ensured by designing the equipment parameters and performing small batches of machining multiple times.

[0018] Step 2: During the finishing process, place the grinding roller against the inner wall of the bearing, and then pull the support frame until the contact rollers at the upper and lower ends of the support frame contact the inner wall of the bearing.

[0019] Step 3: Start the drive motor. The drive shaft transmits power to the outer connecting shaft through the outer rotating shaft. The outer connecting shaft meshes with the inner connecting shaft, and the inner connecting shaft rotates. The inner connecting shaft is connected to the grinding roller through the inner rotating shaft. At this time, the grinding roller grinds the inner wall of the bearing.

[0020] Step 4: When the grinding roller breaks, the triggering mechanism senses the vibration of the inner rotating shaft and triggers the transmission mechanism. The electromagnetic telescopic rod inside the transmission mechanism retracts, causing the inner connecting shaft to separate from the outer connecting shaft. The inner connecting shaft stops rotating, and the grinding roller also stops rotating.

[0021] Step 5: The fragments broken by the grinding roller splash and hit the inside of the collection net on its side. The collection net bends, and at the same time, the magnetic blocks inside the collection net attract and stick to each other, and the collection net wraps and collects the fragments.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention, through the coordinated action of the triggering mechanism and the transmission mechanism, when the grinding roller breaks and causes the inner rotating shaft to vibrate violently, the triggering mechanism can quickly sense and trigger the pressure switch, causing the electromagnetic telescopic rod to retract, driving the inner connecting shaft to separate from the outer connecting shaft, quickly cutting off the power transmission, and allowing the grinding roller to stop rotating immediately. This effectively avoids secondary damage to the bearing inner hole and equipment caused by the continuous operation of the broken grinding roller.

[0024] 2. In this invention, the collecting mesh in the collecting mechanism is made of steel wire mesh, and magnetic blocks are fixed at the mesh knots. Half of the magnetic blocks are positive and the other half are negative. When the fragments splash and hit the collecting mesh, the collecting mesh is bent by the force, and the magnetic blocks on both sides attract and stick to each other, which can quickly wrap the fragments and prevent the fragments from splashing and spreading. This achieves the effect of collecting the splashed fragments and avoiding secondary damage to the bearing or injury to the staff. Attached Figure Description

[0025] Figure 1 This invention provides a frontal three-dimensional structural diagram of the overall equipment in a high-precision graphite bearing inner hole grinding device.

[0026] Figure 2 This invention provides a frontal cross-sectional view of the overall structure of a high-precision graphite bearing inner hole grinding device.

[0027] Figure 3 This invention provides a side three-dimensional structural diagram of the grinding roller and support frame in a high-precision graphite bearing inner hole grinding device.

[0028] Figure 4 A side perspective view of the collecting mechanism in a high-precision graphite bearing inner hole grinding device is provided for this invention.

[0029] Figure 5 This invention provides a frontal cross-sectional view of the grinding roller and support frame in a high-precision graphite bearing inner hole grinding device.

[0030] Figure 6 This invention proposes a high-precision graphite bearing inner hole grinding device. Figure 5 A magnified structural diagram at point A;

[0031] Figure 7 This invention provides a frontal planar structural diagram of a collection mesh in a high-precision graphite bearing inner hole grinding device.

[0032] Figure 8 This invention provides a cross-sectional planar structural diagram of the mounting frame and grinding roller in a high-precision graphite bearing inner hole grinding device.

[0033] Figure 9 This invention proposes a high-precision graphite bearing inner hole grinding device. Figure 8 A magnified structural diagram at point B;

[0034] Figure 10 A cross-sectional view of the mounting bracket in a high-precision graphite bearing inner hole grinding device is provided for this invention.

[0035] Figure 11 A cross-sectional view of the connecting mechanism in a high-precision graphite bearing inner hole grinding device is provided for this invention.

[0036] Figure 12 This invention proposes a high-precision graphite bearing inner hole grinding device. Figure 11 A magnified structural diagram at point C;

[0037] Figure 13 This invention provides a schematic cross-sectional view of the connection between the roller and the support frame in a high-precision graphite bearing inner hole grinding device.

[0038] Legend: 1. Bearing; 2. Mounting bracket; 3. Outer rotating shaft; 4. Outer connecting shaft; 5. Inner connecting shaft; 6. Inner rotating shaft; 7. Triggering mechanism; 701. Sliding groove; 702. Pressure block; 703. Trigger rod; 704. Limit block; 705. Spring No. 1; 706. Spring No. 2; 707. Pressure switch; 708. Elastic sheet; 709. Roller; 8. Transmission mechanism; 801. Square groove; 802. Slider; 803. Electromagnetic telescopic rod; 804. Connector 9. Grinding roller; 10. Connecting rod; 11. Support frame; 12. Collection mechanism; 1201. Rope winding shaft; 1202. Torsion spring; 1203. Collection net; 1204. Rope winding groove; 1205. Magnetic block; 1206. Connecting rope; 1207. Winding shaft; 13. Connecting mechanism; 1301. Slide rod; 1302. Limiting plate; 1303. Support plate; 1304. Movable groove; 1305. Snap-fit ​​block; 1306. No. 3 spring; 14. Contact roller. Detailed Implementation

[0039] 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.

[0040] like Figure 1-3 As shown, a high-precision graphite bearing inner hole grinding device includes a mounting frame 2, and an outer rotating shaft 3 is rotatably connected inside the mounting frame 2, such as... Figure 3 As shown, an outer connecting shaft 4 is fixedly connected to the end of the outer rotating shaft 3. The outer rotating shaft 3 is fixedly connected to the output shaft of the drive motor required for grinding. The mounting frame 2 is composed of inner and outer layers, and the inner and outer layers are rotatably connected. The outer connecting shaft 4 is fixedly connected to the surface of the outer layer of the mounting frame 2. When grinding is performed, the drive motor drives the outer rotating shaft 3 to start rotating, and the outer connecting shaft 4 and the outer layer of the mounting frame 2 also rotate accordingly.

[0041] like Figure 3 As shown, the outer connecting shaft 4 is engaged with the inner connecting shaft 5 at the end away from the outer rotating shaft 3. The end faces of the outer connecting shaft 4 and the inner connecting shaft 5 are provided with tooth grooves. The outer connecting shaft 4 and the inner connecting shaft 5 are engaged with each other. When the outer connecting shaft 4 and the inner connecting shaft 5 are engaged with each other, the inner connecting shaft 5 rotates with the outer connecting shaft 4. When the outer connecting shaft 4 and the inner connecting shaft 5 are separated, the inner connecting shaft 5 stops rotating.

[0042] like Figure 1-2 As shown, an inner rotating shaft 6 is fixedly connected to the end of the inner connecting shaft 5 away from the outer connecting shaft 4, and a grinding roller 9 is fixedly connected to the end of the inner rotating shaft 6 away from the inner connecting shaft 5. A bearing 1 is movably connected to the outer surface of the grinding roller 9, and the grinding roller 9 is attached to the inner surface of the bearing 1, so that the grinding roller 9 grinds the inner diameter of the bearing 1.

[0043] like Figure 8-10 As shown, the end of the mounting bracket 2 is provided with a triggering mechanism 7, such as... Figure 9 As shown, the triggering mechanism 7 includes a sliding groove 701, a pressure block 702 is slidably connected inside the sliding groove 701, and a trigger rod 703 is fixedly connected to the top of the pressure block 702, as shown. Figure 10 As shown, a roller 709 is rotatably connected to the end of the trigger rod 703 away from the pressure block 702. The roller 709 is in contact with the surface of the inner rotating shaft 6. The sliding groove 701 is opened on the side of the mounting frame 2 near the grinding roller 9, and the roller 709 is in contact with the surface of the inner rotating shaft 6. When the inner rotating shaft 6 vibrates, it can be transmitted to the pressure block 702 through the roller 709 in contact with its surface. The pressure block 702 slides left and right inside the sliding groove 701 as the inner rotating shaft 6 vibrates.

[0044] like Figure 9 As shown, a limiting block 704 is slidably connected inside the pressure block 702. A limiting groove is opened at the bottom of the sliding groove 701. The limiting block 704 is engaged inside the limiting groove. The mutual engagement between the limiting block 704 and the limiting groove can limit the displacement of the pressure block 702 inside the sliding groove 701. The limiting block 704 is a wedge-shaped block, and the limiting groove is a wedge-shaped groove, so that when the pressure block 702 is pushed by a large force, the limiting block 704 can be pushed into the interior of the pressure block 702. The pressure block 702 can move towards the bottom of the sliding groove 701. There are three wedge-shaped grooves. When the pressure block 702 moves towards the bottom of the sliding groove 701 and engages with the bottommost wedge-shaped groove, the pressure block 702 contacts the elastic sheet 708 and presses the elastic sheet 708.

[0045] like Figure 9As shown, a first spring 705 is fixedly connected to the upper surface of the limiting block 704, a second spring 706 is fixedly connected to the side wall of the pressure block 702, a pressure switch 707 is fixedly connected to the bottom of the sliding groove 701, and an elastic sheet 708 is fixedly connected to the top of the pressure switch 707. The elastic sheet 708 is attached to the bottom of the sliding groove 701 and protrudes upward. When the pressure block 702 is pushed and slides to the bottom of the sliding groove 701, it will press the elastic sheet 708. The elastic sheet 708 deforms and moves downward, pressing the pressure switch 707 at its bottom. The pressure block 702 can press the elastic sheet 708 within a certain area at the bottom of the sliding groove 701, increasing the effective pressing range.

[0046] like Figure 10 As shown, the mounting bracket 2 has a transmission mechanism 8 inside. The transmission mechanism 8 includes a square groove 801. A slider 802 is slidably connected inside the square groove 801. An electromagnetic telescopic rod 803 is fixedly connected to the upper surface of the slider 802. The mounting bracket 2 has a power supply inside. One end of the pressure switch 707 is connected to the power supply, and the other end is connected to the electromagnetic telescopic rod 803 through a wire. The electromagnetic telescopic rod 803 consists of two rods that are nested together. A return spring is fixedly connected between the two rods. Electromagnets are fixedly connected inside the close ends of the two rods. The close ends of the two electromagnets are opposite magnetic poles. When the pressure switch 707 is pressed, the electromagnetic telescopic rod 803 is energized and retracts. When the pressure switch 707 is not pressed, the electromagnetic telescopic rod 803 can extend.

[0047] like Figure 10 As shown, the side wall of the slider 802 is rotatably connected to the connecting block 804. The mounting frame 2 is composed of inner and outer layers, which are rotatably connected. The outer connecting shaft 4 is fixedly connected to the surface of the outer layer of the mounting frame 2. The square groove 801 is opened on the inner surface of the inner layer of the mounting frame 2. The connecting block 804 is fixedly connected to the surface of the inner connecting shaft 5. When the electromagnetic telescopic rod 803 retracts, the connecting block 804 drives the inner connecting shaft 5 to separate from the outer connecting shaft 4. At this time, the inner connecting shaft 5 stops rotating. When the electromagnetic telescopic rod 803 extends, the inner connecting shaft 5 and the outer connecting shaft 4 engage and lock, causing the inner connecting shaft 5 to start rotating.

[0048] Therefore, when the grinding roller 9 breaks, the initial collision between the grinding roller 9 and the inner wall of the bearing 1 will cause the inner rotating shaft 6 to swing violently. The roller 709, which is attached to the surface of the inner rotating shaft 6, will swing accordingly and drive the pressure block 702 to slide to the other end of the sliding groove 701 through the trigger rod 703. At this time, the pressure block 702 presses the elastic sheet 708, the pressure switch 707 is pressed, and the electromagnetic telescopic rod 803 retracts. The inner connecting shaft 5 and the outer connecting shaft 4 separate from each other, and the inner rotating shaft 6 stops rotating, thus preventing the grinding roller 9 from continuing to rotate after breaking and avoiding secondary damage caused by the grinding roller 9 continuing to collide with the inner wall of the bearing after breaking.

[0049] like Figure 1 As shown, a connecting rod 10 is slidably connected to the side of the mounting frame 2 away from the triggering mechanism 7. A support frame 11 is fixedly connected to the end of the connecting rod 10 away from the mounting frame 2. A through groove is opened at the end of the mounting frame 2. The connecting rod 10 is slidably connected inside the through groove, so that the connecting rod 10 remains in the original position when the mounting frame 2 rotates. The support frame 11 is divided into upper and lower parts. The support frame 11 is an arc-shaped hollow plate, and the center of the support frame 11 is on the same axis as the axis of the mounting frame 2. The support frame 11 can surround the grinding roller 9 from the side.

[0050] like Figure 4-7 As shown, the support frame 11 has a collection mechanism 12 inside, such as... Figure 6 As shown, the collecting mechanism 12 includes a rope winding shaft 1201, and a torsion spring 1202 is elastically connected inside the rope winding shaft 1201. A rope winding groove 1204 is provided on the side of the support frame 11 near the rope winding shaft 1201. The rope winding shaft 1201 is located inside the rope winding groove 1204, and the rope winding shaft 1201 can be wound up under the action of the torsion spring 1202 when it is not pulled by an external force.

[0051] like Figure 6 As shown, a collecting net 1203 is wound around the surface of the winding shaft 1201. A magnetic block 1205 is fixedly connected inside the collecting net 1203. The collecting net 1203 is a wire mesh, and the magnetic block 1205 is fixedly connected to the knot of the wire mesh. The magnetic block 1205 on one half of the surface of the collecting net 1203 is positive on the outward side, and the magnetic block 1205 on the other half is negative. When the grinding roller 9 breaks and impacts into the inside of the collecting net 1203, the collecting net 1203 is forced to extend from the surface of the winding shaft 1201. At the same time, the magnetic blocks 1205 on both sides of the bent collecting net 1203 attract each other, wrapping the fragments of the grinding roller 9 inside the collecting net 1203, thus preventing the fragments from causing secondary damage to the inner wall of the bearing 1.

[0052] like Figure 7 As shown, a connecting rope 1206 is fixedly connected to the side of the collection net 1203. A roller 1207 is rotatably connected to the end of the connecting rope 1206 away from the collection net 1203. The roller 1207 is fixedly connected to the side wall of the support frame 11. When the collection net 1203 is hit by the broken grinding roller 9, it will retract inward. In the normal state when it is not hit by the grinding roller 9, the collection net 1203 can be unfolded under the pull of the connecting rope 1206, thus realizing the effect of unfolding the collection net 1203 during normal operation and automatically retracting when hit by the grinding roller 9.

[0053] like Figure 11-12 As shown, the outer surface of the support frame 11 is provided with a connecting mechanism 13, such as... Figure 11As shown, the connecting mechanism 13 includes a slide rod 1301, a limit plate 1302 is fixedly connected to the end of the slide rod 1301, and a support plate 1303 is slidably connected to the surface of the slide rod 1301. There are two support plates 1303, which are fixedly connected to the outer surfaces of the upper and lower layers of the support frame 11 respectively, and a snap-fit ​​groove is provided on the outer surface of the slide rod 1301.

[0054] like Figure 12 As shown, a movable groove 1304 is provided on the surface of the support plate 1303 near the slide rod 1301. A snap-fit ​​block 1305 is slidably connected inside the movable groove 1304. A No. 3 spring 1306 is fixedly connected to the snap-fit ​​block 1305 near the bottom of the movable groove 1304. Under the action of the No. 3 spring 1306, the snap-fit ​​block 1305 extends out of the movable groove 1304 and snaps into the snap-fit ​​groove on the surface of the slide rod 1301. By fixing the support plate 1303 relative to the slide rod 1301, the support frame 11 is fixed relative to the slide rod 1301, and the displacement between the upper and lower parts of the support frame 11 can be adjusted.

[0055] like Figure 2 As shown, a contact roller 14 is rotatably connected to the end of the support frame 11. By the displacement of the upper and lower parts of the support frame 11, the contact roller 14 is attached to the inner surface of the bearing 1, so that the support frame 11 can wrap around the grinding roller 9 and prevent the debris from flying out of the support frame 11 when the grinding roller 9 breaks.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision grinding apparatus for the inner bore of graphite bearings, characterized in that: The device includes a mounting frame (2), which is divided into inner and outer layers. The end of the mounting frame (2) is provided with a triggering mechanism (7). The inside of the mounting frame (2) is provided with a transmission mechanism (8). The inside of the mounting frame (2) is rotatably connected to an outer rotating shaft (3). The end of the outer rotating shaft (3) is fixedly connected to an outer connecting shaft (4). The end of the outer connecting shaft (4) away from the outer rotating shaft (3) is engaged with an inner connecting shaft (5). The end of the inner connecting shaft (5) away from the outer connecting shaft (4) is fixedly connected to an inner rotating shaft (6). The end of the inner rotating shaft (6) away from the inner connecting shaft (5) is fixedly connected to a grinding roller (9). The side of the end of the mounting frame (2) away from the triggering mechanism (7) is slidably connected to a connecting rod (10). The end of the connecting rod (10) away from the mounting frame (2) is fixedly connected to a support frame (11). The inside of the support frame (11) is provided with a collecting mechanism (12). The collecting mechanism (12) includes a rope winding shaft (1201), a torsion spring (1202) is elastically connected inside the rope winding shaft (1201), a collecting net (1203) is wound around the surface of the rope winding shaft (1201), a rope winding groove (1204) is provided on the side of the support frame (11) near the rope winding shaft (1201), a magnetic block (1205) is fixedly connected inside the collecting net (1203), a connecting rope (1206) is fixedly connected to the side of the collecting net (1203), and a winding shaft (1207) is rotatably connected to the end of the connecting rope (1206) away from the collecting net (1203).

2. The high-precision graphite bearing inner hole grinding device according to claim 1, characterized in that: The outer surface of the grinding roller (9) is movably connected to a bearing (1), the outer surface of the support frame (11) is provided with a connecting mechanism (13), and the end of the support frame (11) is rotatably connected to a contact roller (14). The triggering mechanism (7) includes a sliding groove (701), a pressure block (702) is slidably connected inside the sliding groove (701), a trigger rod (703) is fixedly connected to the top of the pressure block (702), a limit block (704) is slidably connected inside the pressure block (702), a first spring (705) is fixedly connected to the upper surface of the limit block (704), a second spring (706) is fixedly connected to the side wall of the pressure block (702), a pressure switch (707) is fixedly connected to the bottom of the sliding groove (701), an elastic sheet (708) is fixedly connected to the top of the pressure switch (707), and a roller (709) is rotatably connected to the end of the trigger rod (703) away from the pressure block (702).

3. The high-precision graphite bearing inner hole grinding device according to claim 2, characterized in that: The transmission mechanism (8) includes a square groove (801), a slider (802) is slidably connected inside the square groove (801), an electromagnetic telescopic rod (803) is fixedly connected to the upper surface of the slider (802), and a connecting block (804) is rotatably connected to the side wall of the slider (802).

4. The high-precision graphite bearing inner hole grinding device according to claim 3, characterized in that: The connecting mechanism (13) includes a slide rod (1301), a limit plate (1302) is fixedly connected to the end of the slide rod (1301), a support plate (1303) is slidably connected to the surface of the slide rod (1301), a movable groove (1304) is opened on the surface of the support plate (1303) near the slide rod (1301), a snap-fit ​​block (1305) is slidably connected inside the movable groove (1304), and a No. 3 spring (1306) is fixedly connected to the snap-fit ​​block (1305) near the bottom of the movable groove (1304).

5. The high-precision graphite bearing inner hole grinding apparatus according to claim 4, characterized in that: The outer rotating shaft (3) is fixedly connected to the output shaft of the drive motor required for grinding. The end faces of the outer connecting shaft (4) and the inner connecting shaft (5) are provided with tooth grooves. The outer connecting shaft (4) and the inner connecting shaft (5) mesh with each other. The grinding roller (9) is attached to the inner surface of the bearing (1).

6. The high-precision graphite bearing inner hole grinding apparatus according to claim 5, characterized in that: The roller (709) is attached to the surface of the inner rotating shaft (6), the bottom of the sliding groove (701) is provided with a limiting groove, the limiting block (704) is engaged inside the limiting groove, the elastic sheet (708) is attached to the bottom of the sliding groove (701) and the elastic sheet (708) protrudes upward.

7. The high-precision graphite bearing inner hole grinding apparatus according to claim 6, characterized in that: The mounting bracket (2) is equipped with a power source. One end of the pressure switch (707) is connected to the power source, and the other end is connected to the electromagnetic telescopic rod (803) via a wire.

8. The high-precision graphite bearing inner hole grinding apparatus according to claim 7, characterized in that: The mounting bracket (2) is rotatably connected to the inner and outer layers. The outer connecting shaft (4) is fixedly connected to the surface of the outer layer of the mounting bracket (2). The square groove (801) is opened on the inner surface of the inner layer of the mounting bracket (2). The connecting block (804) is fixedly connected to the surface of the inner connecting shaft (5).

9. The high-precision graphite bearing inner hole grinding apparatus according to claim 8, characterized in that: The collecting net (1203) is a wire mesh, and the magnetic block (1205) is fixedly connected to the knot of the wire mesh. The magnetic block (1205) on one half of the surface of the collecting net (1203) is positive on the outward side, and the magnetic block (1205) on the other half of the surface is negative. The roller (1207) is fixedly connected to the side wall of the support frame (11).

10. A grinding method for a high-precision graphite bearing inner hole grinding device, characterized in that: The high-precision graphite bearing inner hole grinding apparatus according to claim 9 includes the following steps: S1: Clamp the parts to be processed on the grinding station of the machine tool. The clamping parts start to rotate. At this time, place the grinding tool on the inner ring of the bearing (1) and perform rough processing. During rough processing, remove excess material inside, change the surface shape and size of the material, thereby eliminating internal stress. At the same time, use the hammering method to lightly hammer the material to remove stress deformation in two ways. Then perform semi-finishing. Apply periodic external force to the workpiece to make it resonate. Finally, perform finishing. During finishing, ensure the flatness, parallelism, roundness and cylindricity of the product by designing the equipment parameters and performing processing in small quantities and multiple times. S2: During finishing, the grinding roller (9) is placed against the inner wall of the bearing (1), and then the support frame (11) is pulled until the contact roller (14) at the upper and lower ends of the support frame (11) contacts the inner wall of the bearing (1). S3: Start the drive motor, and the drive shaft is transmitted to the outer connecting shaft (4) through the outer rotating shaft (3). The outer connecting shaft (4) meshes with the inner connecting shaft (5), and the inner connecting shaft (5) rotates. The inner connecting shaft (5) is connected to the grinding roller (9) through the inner rotating shaft (6). At this time, the grinding roller (9) grinds the inner wall of the bearing (1). S4: When the grinding roller (9) is broken, the triggering mechanism (7) senses the vibration of the inner rotating shaft (6) and triggers the transmission mechanism (8). The electromagnetic telescopic rod (803) inside the transmission mechanism (8) retracts, causing the inner connecting shaft (5) to separate from the outer connecting shaft (4). The inner connecting shaft (5) stops rotating, and the grinding roller (9) also stops rotating. S5: The broken fragments of the grinding roller (9) splash and hit the inside of the collection net (1203) on its side. The collection net (1203) bends, and at the same time, the magnetic blocks (1205) inside the collection net (1203) attract and stick to each other. The collection net (1203) wraps and collects the fragments.

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