Automatic grinding device and grinding method for hard alloy bushing

Abstract

The application relates to the technical field of grinding equipment, and provides a hard alloy shaft sleeve automatic grinding device and a grinding method thereof, which comprises a device main body, a workbench and a grinding device are arranged on the device main body, two mounting racks are slidably arranged on the workbench in the horizontal direction, a driving assembly is arranged on the workbench, the driving assembly is used for driving the two mounting racks to move towards each other or away from each other, and a clamping part is arranged on each mounting rack; a turnover device is arranged on the device main body, the turnover device is used for overturning the clamping part, the turnover device comprises a lifting assembly and a rotating assembly, the lifting assembly is used for driving the clamping part to move in the vertical direction, and the rotating assembly is used for driving the clamping part to rotate; and a hard alloy shaft sleeve grinding method is adopted, the grinding device is operated, the application can guarantee the consistency of the grinding effects of two ends of the shaft sleeve, and the precision of the shaft sleeve grinding processing is improved.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and more specifically, to an automatic grinding device and grinding method for carbide bushings. Background Technology

[0002] The content in this section only provides background information related to this invention and may not constitute prior art.

[0003] Carbide bushings are widely used in rotating shaft support and protection structures in petrochemical, mining machinery, automobile manufacturing and aerospace fields due to their high hardness, high wear resistance and good corrosion resistance. After being sintered by powder metallurgy, these bushings have extremely high hardness and need to be ground to achieve micron-level dimensional accuracy and the required surface roughness. Therefore, grinding is the key process in the final forming of carbide bushings, and its processing quality directly determines the fitting accuracy and service life between the bushing and the rotating shaft.

[0004] Existing carbide bushing grinding equipment typically includes a bed, a machining box, a clamping mechanism, a grinding mechanism, and a feed system. The clamping mechanism fixes the bushing in the machining box using a chuck and other clamping devices. The grinding mechanism is equipped with a grinding wheel spindle and a grinding wheel. The feed system drives the grinding wheel to move, grinding the outer cylindrical surface and inner wall of the bushing. During the machining process, the operator sets the grinding parameters through the CNC system, and the equipment completes the feeding and grinding operations according to the preset program.

[0005] However, the aforementioned technologies have the following drawbacks. In conventional grinding operations, it is usually necessary to flip the bushing to ensure the consistency of the grinding effect at both ends of the bushing. In the existing technology, when it is necessary to flip the bushing, the clamping mechanism must first be released from the bushing, and the bushing must be manually flipped by the operator before it is clamped and fixed again. This results in the need to readjust the clamping position and reposition it after the flip. In this process, secondary positioning errors are easily introduced, making it difficult to ensure the consistency of the grinding effect at both ends of the bushing. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention aims to provide an automatic grinding device and grinding method for carbide bushings, which can ensure the consistency of grinding effects at both ends of the bushing and improve the precision of bushing grinding.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] On the one hand, the present invention provides an automatic grinding device for cemented carbide bushings.

[0009] An automatic grinding device for carbide bushings includes a main body, on which a worktable and a grinding machine are mounted. Two mounting brackets are slidably mounted on the worktable in a horizontal direction. A driving assembly is provided on the worktable to drive the two mounting brackets to move toward each other or away from each other. Each mounting bracket is provided with a clamping part. A flipping device is provided on the main body to flip the clamping part. The flipping device includes a lifting assembly and a rotating assembly. The lifting assembly is used to drive the clamping part to move in a vertical direction, and the rotating assembly is used to drive the clamping part to rotate.

[0010] In some possible embodiments, the rotating assembly includes a rotary drive source, a worm gear, and a worm. The mounting frame is provided with a mounting part, and a mounting shaft is rotatably mounted on the mounting part. One end of the mounting shaft is fixedly connected to a clamping part, and the other end is coaxially fixedly connected to a worm gear. A first frame is provided on the worktable, and the worm is rotatably mounted on the first frame. The worm meshes with the worm gear, and the worm is drively connected to the output end of the rotary drive source.

[0011] In some possible embodiments, a second frame is provided on the workbench, the rotary drive source is disposed on the second frame, the output end of the rotary drive source is coaxially fixedly sleeved with a first bevel gear, the end of the worm away from the worm wheel is coaxially sleeved with a second bevel gear, the axes of the first bevel gear and the second bevel gear are perpendicular to each other, the worm and the second bevel gear are connected by a one-way transmission assembly, the mounting part is slidably disposed on the mounting frame in the vertical direction, and the lifting assembly is used to drive the mounting part to move on the mounting frame.

[0012] In some possible embodiments, the unidirectional transmission assembly includes a first arc-shaped limiting tooth and a second arc-shaped limiting tooth. A transmission groove is formed on the second bevel gear. One end of the worm is rotatably disposed in the transmission groove. Multiple first arc-shaped limiting teeth are provided, and the multiple first arc-shaped limiting teeth are uniformly fixedly disposed on the inner peripheral wall of the transmission groove. At least one mounting seat is fixedly disposed at the end of the worm along the axis of the worm. The second arc-shaped limiting tooth is rotatably disposed on the mounting seat. An elastic element is provided on the mounting seat. The elastic element acts on the second arc-shaped limiting tooth, causing the second arc-shaped limiting tooth to have a tendency to deflect toward the first arc-shaped limiting tooth. The convex surface of the first arc-shaped limiting tooth abuts against the convex surface of the second arc-shaped limiting tooth.

[0013] In some possible embodiments, the mounting bracket has a mounting groove, the mounting part is slidably disposed in the mounting groove, the side wall of the mounting groove has a sliding groove in the vertical direction, a slider is fixedly disposed on the side wall of the mounting part, the slider is slidably disposed in the sliding groove, the lifting assembly includes a lifting screw and a lifting drive source, the lifting drive source is fixedly disposed on the mounting bracket, the lifting screw is rotatably disposed in the sliding groove, the slider is threadedly sleeved on the lifting screw, and the lifting screw is connected to the output end of the lifting drive source.

[0014] In some possible embodiments, the mounting shaft includes a first rotating shaft and a second rotating shaft. The first rotating shaft is rotatably mounted on a first frame. One end of the first rotating shaft is coaxially and fixedly connected to a worm gear. A slot is provided at the end of the first rotating shaft away from the worm gear along the axial direction of the first rotating shaft. The second rotating shaft slides through the slot and rotatably passes through the mounting part. The clamping part is fixedly mounted at the end of the second rotating shaft away from the slot.

[0015] In some possible embodiments, a guide groove is formed on the inner wall of the slot along the length of the slot, a guide block is slidably disposed in the guide groove, the guide block is fixedly connected to the second rotating shaft, a through hole is formed on the mounting part for the second rotating shaft to pass through, an annular groove is formed on the inner wall of the through hole, an annular block is rotatably disposed in the annular groove, and the annular block is fixedly connected to the second rotating shaft.

[0016] In some possible embodiments, the drive assembly includes a horizontal drive source and a horizontal lead screw. An adjustment groove is provided on the worktable, and two adjustment blocks are slidably disposed in the adjustment groove. The two adjustment blocks are fixedly connected to two mounting brackets in a one-to-one correspondence. The horizontal lead screw rotatably passes through the adjustment groove. The two ends of the horizontal lead screw have threaded grooves with opposite directions of rotation. The two adjustment blocks are respectively threaded onto the two ends of the horizontal lead screw. The horizontal drive source is disposed on the worktable, and the horizontal lead screw is drivenly connected to the output end of the horizontal drive source.

[0017] In some possible embodiments, a worktable is fixedly provided in the middle of the adjusting groove. The worktable is used to place the bushing to be processed. The top of the worktable is flush with the top of the workbench. The horizontal lead screw rotates through the worktable.

[0018] On the other hand, the present invention also provides a method for grinding carbide bushings.

[0019] An automatic grinding method for carbide bushings, characterized in that it employs the automatic grinding device for carbide bushings as described in any one of claims 1-9, and the steps are as follows:

[0020] S1. Place the bushing to be processed on the worktable, drive the two mounting brackets to move closer to each other through the drive assembly, so that the clamping part clamps and fixes the bushing, and start the grinding equipment to grind the first end of the bushing.

[0021] S2. Start the lifting assembly to move the mounting part upward along the mounting frame, so that the second bevel gear meshes with the first bevel gear;

[0022] S3. Start the rotary drive source to drive the first bevel gear to rotate. Through the one-way transmission component, the worm, worm wheel and mounting shaft will rotate, causing the clamping part to rotate around the horizontal axis. At the same time, the lifting component will drive the mounting part to move downward until the clamping part drives the bushing to rotate 180° so that the second end of the bushing faces upward.

[0023] S4. Start the grinding equipment to grind the second end of the bushing;

[0024] Throughout the entire process from S1 to S4, the clamping part maintains continuous clamping of the bushing.

[0025] In some possible embodiments, in S2, before the second bevel gear meshes with the first bevel gear, during the process of the lifting assembly driving the mounting part to move upward, the second bevel gear first contacts the first bevel gear and rotates relative to the worm in the first direction. After the second bevel gear and the first bevel gear are fully meshed, the lifting assembly stops operating.

[0026] In some possible embodiments, in S3, after the clamping part drives the bushing to rotate by an angle a, the lifting assembly drives the mounting part to move downward, the second bevel gear and the first bevel gear remain meshed and continue to rotate in the second direction, and during the descent of the mounting part, the clamping part continues to rotate by an angle b, and a+b=180°, so that the bushing rotates 180° when the descent is completed.

[0027] In summary, the technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0028] 1. By sliding two mounting brackets on the worktable and setting a clamping part on each mounting bracket, the two mounting brackets are driven to move closer or further apart using a drive assembly, which realizes the rapid clamping and release of the bushing. At the same time, in conjunction with the lifting and rotating components of the flipping device, the bushing can be automatically flipped while the clamping part keeps the bushing continuously clamped. This avoids the positioning error introduced by the manual flipping and secondary positioning after the clamping is released in the prior art, effectively ensuring the consistency of the grinding effect at both ends of the bushing and improving the accuracy of bushing grinding to a certain extent.

[0029] 2. The flipping device is configured as a combination of a lifting component and a rotating component. The lifting component drives the mounting part and the clamping part to move in the vertical direction, while the rotating component drives the clamping part to rotate around the horizontal axis through a worm gear transmission. During the flipping process, the lifting component engages the second bevel gear with the first bevel gear during the rising phase of the bushing, and continuously drives the clamping part to rotate in conjunction with the rotating component during the falling phase of the bushing. This allows the lifting and rotating actions of the bushing to be coordinated, making full use of the lifting stroke to complete a 180° flip. There is no need to set up an additional independent flipping drive station, which simplifies the equipment structure to a certain extent and improves the processing efficiency.

[0030] 3. By setting a one-way transmission component between the worm and the second bevel gear, the second bevel gear rotates freely relative to the worm when rotating in the first direction, and drives the worm to rotate through the abutment of the first arc-shaped limiting tooth and the second arc-shaped limiting tooth when rotating in the second direction. Thus, during the process of the lifting component driving the mounting part to move upward, the second bevel gear contacts the first bevel gear and rotates freely. After full engagement, the rotation drive source drives the second bevel gear to rotate in the second direction to drive the worm gear transmission. This effectively avoids transmission interference caused by the rotation drive source starting accidentally or the bevel gear not fully engaging during the lifting process, ensuring the reliability of rotational power transmission and the smoothness of the flipping action.

[0031] 4. By setting up a worktable for placing the bushing to be processed, and using horizontal lead screws with opposite directions at both ends to drive two adjusting blocks and corresponding mounting brackets to move closer or further away synchronously, the centering and clamping of the clamping part is achieved. At the same time, the mounting shaft adopts a split structure with the first rotating shaft and the second rotating shaft slidingly inserted. With the sliding guidance of the guide groove and the guide block, the clamping part and the bushing can move up and down synchronously with the mounting part during the lifting process. Moreover, the rotational power can still be stably transmitted to the clamping part through the worm gear, which to a certain extent ensures the continuity of rotational transmission during the lifting process and is conducive to improving the stability of bushing flipping and the reliability of clamping and positioning. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the workbench according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the flipping device according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the rotating component according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of a unidirectional transmission assembly according to an embodiment of the present invention;

[0037] Figure 6 for Figure 5 Enlarged view of part A in the image;

[0038] Figure 7 This is a cross-sectional view of the mounting shaft according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the structure of the driving component according to an embodiment of the present invention.

[0040] Icons: 1. Main body of the device; 11. Worktable; 12. Grinding equipment; 13. First frame; 14. Second frame; 2. Mounting frame; 21. Clamping part; 22. Mounting part; 23. Mounting shaft; 24. First rotating shaft; 25. Second rotating shaft; 26. Slot; 27. Guide groove; 28. Guide block; 29. ​​Through hole; 3. Tilting device; 4. Lifting assembly; 41. Lifting screw; 42. Lifting drive source; 5. Rotating assembly; 51 52. Rotary drive source; 53. Worm gear; 54. First bevel gear; 55. Second bevel gear; 6. One-way transmission assembly; 61. First arc-shaped limiting tooth; 62. Second arc-shaped limiting tooth; 63. Transmission groove; 64. Mounting base; 65. Elastic element; 7. Mounting groove; 71. Slide groove; 72. Slider; 8. Drive assembly; 81. Horizontal drive source; 82. Horizontal lead screw; 83. Adjustment groove; 84. Adjustment block; 85. Worktable. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] The following is for reference Figures 1 to 8 The present invention will be described in further detail below.

[0043] On the one hand, the present invention provides an automatic grinding device for cemented carbide bushings.

[0044] Reference Figure 1 , Figure 2 and Figure 3An automatic grinding device for carbide bushings includes a main body 1, which serves as the basic load-bearing structure of the entire device. A worktable 11 and a grinding device 12 are provided on the main body 1. The worktable 11 is horizontally fixed on the upper part of the main body 1 and is used to support and install various functional components. The grinding device 12 is installed on the main body 1 and located on one side of the worktable 11. The grinding device 12 includes a grinding wheel spindle and a grinding wheel installed at the end of the grinding wheel spindle. The grinding wheel spindle is driven to rotate by a motor, which drives the grinding wheel to rotate at high speed to perform grinding processing on the outer cylindrical surface and inner hole wall of the bushing.

[0045] Reference Figure 2 and Figure 3 Two mounting brackets 2 are slidably mounted on the worktable 11 along the horizontal direction, and a drive assembly 8 (such as...) is mounted on the worktable 11. Figure 8 As shown), the drive assembly 8 is used to drive the two mounting brackets 2 to move toward each other or away from each other. Each mounting bracket 2 is provided with a clamping part 21, which is positioned toward the area between the two mounting brackets 2 and is used to clamp and fix the bushing from both ends.

[0046] Reference Figure 3 and Figure 4 The main body 1 of the device is equipped with a flipping device 3, which flips the clamping part 21, thereby causing the bushing held by the clamping part 21 to rotate around the horizontal axis, realizing the exchange of positions at both ends of the bushing. The flipping device 3 includes a lifting component 4 and a rotating component 5. The lifting component 4 is used to move the clamping part 21 in the vertical direction, thereby changing the vertical position and height of the clamping part 21 and the clamped bushing. The rotating component 5 is used to drive the clamping part 21 to rotate, thereby realizing the flipping action of the bushing. The lifting component 4 and the rotating component 5 are driven independently, and the two cooperate to complete the flipping process of the bushing.

[0047] By setting the flipping device 3 as a combination of lifting component 4 and rotating component 5, the lifting component 4 drives the clamping part 21 to move in the vertical direction, so that the clamping part 21 and the bushing rise to an appropriate height before flipping, leaving enough space for the rotation action and avoiding interference between the bushing and the worktable 11 or other components during the flipping process. The rotating component 5 is responsible for driving the clamping part 21 to rotate around the horizontal axis, thereby realizing the flipping of the bushing.

[0048] like Figure 3 and Figure 4As shown, in one embodiment of the present invention, the rotating assembly 5 includes a rotating drive source 51, a worm gear 52, and a worm 53. A mounting portion 22 is provided on the mounting frame 2, and a mounting shaft 23 is rotatably mounted on the mounting portion 22. The mounting shaft 23 extends horizontally, with one end fixedly connected to the clamping portion 21 and the other end coaxially fixedly connected to the worm gear 52. The worm gear 52 and the mounting shaft 23 are fixed together and rotate synchronously. A first frame 13 is provided on the worktable 11, fixedly mounted on the worktable 11 and located on one side of the mounting frame 2. The worm 53 is rotatably mounted on the first frame 13, with its axis perpendicular to the axis of the mounting shaft 23. The worm 53 meshes with the worm gear 52 and is connected to the output end of the rotating drive source 51. After the rotating drive source 51 is started, it drives the worm 53 to rotate, which in turn drives the worm gear 52 to rotate, thereby causing the clamping portion 21 to rotate around the horizontal axis via the mounting shaft 23.

[0049] The clamping part 21 is driven to rotate by a worm gear 52 and a worm 53 transmission. The worm gear 52 and worm 53 transmission pair has a large transmission ratio, which can achieve stable deceleration and torque increase transmission in a limited space. This allows the clamping part 21 to obtain sufficient torque during the flipping process to overcome the gravity load of the bushing. At the same time, the worm gear 52 and worm 53 transmission has a self-locking characteristic. When the rotation drive source 51 stops working, the worm gear 52 cannot drive the worm 53 to rotate in the opposite direction. This can keep the clamping part 21 and the bushing in any angle position after flipping, which to a certain extent prevents the bushing from shifting due to accidental force during the processing and helps to improve the positional stability during the grinding process.

[0050] Reference Figure 4 , Figure 5 and Figure 6 A second frame 14 is provided on the workbench 11. The second frame 14 is fixedly installed on the workbench 11 and located on one side of the first frame 13. A rotary drive source 51 is provided on the second frame 14. As an optional embodiment of the present invention, the rotary drive source 51 is a servo motor. The output end of the rotary drive source 51 is coaxially fixedly sleeved with a first bevel gear 54. The end of the worm gear 53 away from the worm wheel 52 is coaxially sleeved with a second bevel gear 55. The axes of the first bevel gear 54 and the second bevel gear 55 are perpendicular to each other. The worm gear 53 and the second bevel gear 55 are connected by a one-way transmission assembly 6. The mounting part 22 is slidably disposed on the mounting frame 2 in the vertical direction. The lifting assembly 4 is used to drive the mounting part 22 to move on the mounting frame 2. By driving the mounting part 22 to rise and fall, the mounting shaft 23, the clamping part 21 and the clamped bushing disposed on the mounting part 22 are driven to rise and fall together.

[0051] A one-way transmission component 6 is provided between the worm 53 and the second bevel gear 55, so that the second bevel gear 55 can drive the worm 53 to rotate only in one rotational direction, while in the other rotational direction the second bevel gear 55 rotates relative to the worm 53.

[0052] like Figure 5 and Figure 6 As shown, the one-way transmission assembly 6 includes a first arc-shaped limiting tooth 61 and a second arc-shaped limiting tooth 62. A transmission groove 63 is formed on the end face of the second bevel gear 55 facing the worm 53. The transmission groove 63 is a circular groove structure. One end of the worm 53 is rotatably disposed within the transmission groove 63, extending into the groove and able to rotate freely relative to it. Multiple first arc-shaped limiting teeth 61 are provided, evenly fixed on the inner circumferential wall of the transmission groove 63, with the convex surface of each tooth facing the interior of the groove. At least one mounting seat 64 is fixedly disposed at the end of the worm 53 along its axis. The mounting seat 64 protrudes axially outward from the end face of the worm 53. The second arc-shaped limiting tooth 62 is rotatably disposed on the mounting seat 64 and can deflect relative to the mounting seat 64 in a direction parallel to the axis of the worm 53. The mounting base 64 is provided with an elastic element 65. The elastic element 65 acts on the second arc-shaped limiting tooth 62, causing the second arc-shaped limiting tooth 62 to tend to deflect toward the first arc-shaped limiting tooth 61. Under the action of the elastic element 65, the convex surface of the second arc-shaped limiting tooth 62 remains in contact with the convex surface of the first arc-shaped limiting tooth 61.

[0053] When the second bevel gear 55 rotates along the first direction, the first arc-shaped limiting tooth 61 rotates together with the second bevel gear 55. The convex surface of the first arc-shaped limiting tooth 61 abuts against the convex surface of the second arc-shaped limiting tooth 62 and slides relative to each other, pushing the second arc-shaped limiting tooth 62 to overcome the elastic force of the elastic element 65 and deflect away from the first arc-shaped limiting tooth 61, so that the first arc-shaped limiting tooth 61 passes over the second arc-shaped limiting tooth 62. At this time, the rotational power of the second bevel gear 55 cannot be transmitted to the worm gear 53, and the second bevel gear 55 spins freely relative to the worm gear 53. When the second bevel gear 55 rotates along the second direction opposite to the first direction, the convex surface of the first arc-shaped limiting tooth 61 abuts against the convex surface of the second arc-shaped limiting tooth 62 and locks against each other. The first arc-shaped limiting tooth 61 pushes the second arc-shaped limiting tooth 62, thereby driving the worm gear 53 to rotate synchronously through the mounting base 64, realizing power transmission.

[0054] Reference Figure 4The mounting bracket 2 has a mounting groove 7 that extends vertically through the upper part of the mounting bracket 2. The cross-sectional shape of the mounting groove 7 matches the outer contour of the mounting part 22. The mounting part 22 is slidably disposed within the mounting groove 7 and can slide back and forth vertically along the mounting groove 7. A sliding groove 71 is formed vertically on the side wall of the mounting groove 7. The sliding groove 71 is recessed inward from the side wall surface of the mounting groove 7 and extends vertically. A slider 72 is fixedly disposed on the side wall of the mounting part 22. The slider 72 protrudes outward from the side wall surface of the mounting part 22 and is slidably disposed within the sliding groove 71. A sliding fit pair is formed between the slider 72 and the sliding groove 71, which guides and limits the lifting and lowering movement of the mounting part 22. The lifting assembly 4 includes a lifting screw 41 and a lifting drive source 42. The lifting drive source 42 is fixedly mounted on the mounting bracket 2 and is a servo motor. The lifting screw 41 is rotatably mounted in the slide groove 71 and extends vertically. Both ends of the lifting screw 41 are rotatably supported on the top and bottom walls of the slide groove 71 by bearings. The slider 72 has a threaded hole, through which it is threaded onto the lifting screw 41. The lifting screw 41 is connected to the output end of the lifting drive source 42. After the lifting drive source 42 is started, it drives the lifting screw 41 to rotate. The lifting screw 41 drives the slider 72 to rise and fall along the slide groove 71 through the threaded engagement, thereby driving the mounting part 22 to rise and fall within the mounting groove 7.

[0055] like Figure 7As shown, the mounting shaft 23 includes a first rotating shaft 24 and a second rotating shaft 25. The first rotating shaft 24 is rotatably mounted on the first frame 13 and is rotatably engaged with the first frame 13 via bearings, allowing it to rotate freely around its own axis. One end of the first rotating shaft 24 is coaxially and fixedly connected to a worm gear 52, which is fixedly fitted to one end of the first rotating shaft 24 via a key connection or interference fit, and the two rotate synchronously. A slot 26 is formed at the end of the first rotating shaft 24 away from the worm gear 52 along the axial direction of the first rotating shaft 24. The slot 26 extends axially inward from the end face of the first rotating shaft 24 and has a non-circular cross-sectional shape. The second rotating shaft 25 slides through the slot 26, with one end extending into the slot 26 and capable of reciprocating along the length of the slot 26. Simultaneously, the second rotating shaft 25 rotates synchronously with the first rotating shaft 24. The second rotating shaft 25 is rotatably mounted on the mounting part 22. The mounting part 22 has a through hole 29 for the second rotating shaft 25 to pass through. The second rotating shaft 25 passes through the through hole 29 and is rotatably engaged with the mounting part 22 via a bearing, allowing the second rotating shaft 25 to rotate freely relative to the mounting part 22 around its own axis. Simultaneously, when the mounting part 22 rises and falls, it drives the second rotating shaft 25 to rise and fall together. The clamping part 21 is fixedly mounted at the end of the second rotating shaft 25 away from the slot 26. The clamping part 21 is fixedly connected to the second rotating shaft 25, and the two rotate synchronously.

[0056] Reference Figure 7 A guide groove 27 is formed on the inner wall of the slot 26 along its length. The guide groove 27 is recessed inward from the inner wall surface of the slot 26 and extends axially along the slot 26. A guide block 28 is slidably disposed within the guide groove 27. The outer contour of the guide block 28 matches the cross-sectional shape of the guide groove 27. The guide block 28 can slide freely within the guide groove 27 along the length of the slot 26. The guide block 28 is fixedly connected to the second rotating shaft 25. The guide block 28 protrudes outward from the outer peripheral wall of the second rotating shaft 25 and is embedded in the guide groove 27. Through the cooperation of the guide block 28 and the guide groove 27, the second rotating shaft 25 is circumferentially limited when sliding within the slot 26, allowing the second rotating shaft 25 and the first rotating shaft 24 to rotate synchronously while sliding freely axially. The mounting part 22 has a through hole 29 for the second rotating shaft 25 to pass through. An annular groove is formed on the inner wall of the through hole 29. The annular groove is an annular groove surrounding the inner wall of the through hole 29. An annular block is rotatably arranged in the annular groove. The outer diameter of the annular block is adapted to the inner diameter of the annular groove. The annular block can rotate freely around its own axis in the annular groove. The annular block is fixedly connected to the second rotating shaft 25 and is sleeved and fixed on the outer peripheral wall of the second rotating shaft 25.

[0057] As one embodiment of the present invention, refer to Figure 8The drive assembly 8 includes a horizontal drive source 81 and a horizontal lead screw 82. An adjustment groove 83 is provided on the worktable 11. Two adjustment blocks 84 are slidably arranged in the adjustment groove 83. The two adjustment blocks 84 are fixedly connected to the two mounting brackets 2 one-to-one. The horizontal lead screw 82 is rotatably inserted into the adjustment groove 83. The two ends of the horizontal lead screw 82 are provided with threaded grooves with opposite directions of rotation. The two adjustment blocks 84 are respectively threaded onto the two ends of the horizontal lead screw 82. The horizontal drive source 81 is set on the worktable 11, and the horizontal lead screw 82 is connected to the output end of the horizontal drive source 81.

[0058] like Figure 8 As shown, a worktable 85 is fixedly installed in the middle of the adjusting groove 83. The worktable 85 is located between two adjusting blocks 84 and is fixedly connected to the worktable 11. The worktable 85 is used to place the bushing to be processed. The top of the worktable 85 is flush with the top of the worktable 11, so that the bushing can maintain a horizontal posture when placed on the worktable 85. The top surface of the worktable 85 is flat, and the width of the worktable 85 is adapted to the axial length of the bushing. The horizontal lead screw 82 rotatably passes through the worktable 85.

[0059] On the other hand, the present invention also provides a method for grinding carbide bushings.

[0060] An automatic grinding method for carbide bushings, employing the aforementioned automatic grinding device for carbide bushings, comprises the following steps:

[0061] S1. Place the bushing to be processed on the worktable 85, ensuring that the axis of the bushing is aligned with the moving direction of the two clamping parts 21. The lower side of the outer peripheral wall of the bushing contacts the top surface of the worktable 85, providing temporary support and positioning for the bushing. The drive assembly 8 drives the two mounting brackets 2 to move closer to each other. Specifically, the horizontal drive source 81 is activated, driving the horizontal lead screw 82 to rotate. The horizontal lead screw 82, through two threads with opposite directions, drives the two adjusting blocks 84 and the corresponding mounting brackets 2 to move along the adjusting groove 83 towards each other. The mounting brackets 2 drive the clamping parts 21 to move synchronously until the two clamping parts 21 abut against the end faces of the bushing from both ends, thus clamping and fixing the bushing. Start the grinding equipment 12. The grinding wheel spindle in the grinding equipment 12 drives the grinding wheel to rotate at high speed. The grinding wheel is driven to move to the first end of the bushing through the feed system of the grinding equipment 12. The outer cylindrical surface and inner wall of the first end of the bushing are ground until the first end reaches the predetermined processing size and surface roughness requirements.

[0062] In step S1, the drive assembly 8 drives the two mounting brackets 2 to approach synchronously via the reverse threads at both ends of the horizontal lead screw 82, ensuring a symmetrical distribution of the clamping force of the two clamping parts 21 on the bushing, which helps prevent the bushing from tilting during clamping. Simultaneously, the worktable 85 provides bottom support for the bushing during clamping, ensuring a stable posture before clamping and facilitating accurate alignment of the clamping parts 21 from both ends. After the clamping parts 21 clamp and fix the bushing, a reliable fixed connection is formed between the bushing and the clamping parts 21, providing a stable clamping foundation for subsequent flipping and grinding processes.

[0063] S2. Start the lifting assembly 4. The lifting drive source 42 drives the lifting screw 41 to rotate. The lifting screw 41 drives the slider 72 to slide upward along the slide groove 71 through the threaded engagement. The slider 72 drives the mounting part 22 to move upward along the mounting groove 7 of the mounting bracket 2. When the mounting part 22 moves upward, it drives the second rotating shaft 25 and the clamping part 21 to move upward together through the annular block. At the same time, the second rotating shaft 25 slides upward in the slot 26, and the clamping part 21 drives the clamped bushing to move upward together. As the mounting part 22 continues to move upward, the end of the worm 53 mounted on the second bevel gear 55 gradually rises. The second bevel gear 55 gradually approaches the first bevel gear 54. When the tooth surface of the second bevel gear 55 begins to contact the first bevel gear 54, the second bevel gear 55 rotates in the first direction under the drive of the first bevel gear 54. Due to the presence of the one-way transmission assembly 6, the second bevel gear 55 rotates relative to the worm 53 at this time and will not drive the worm 53 and the clamping part 21 to rotate. When the second bevel gear 55 is fully engaged with the first bevel gear 54, the lifting assembly 4 stops operating, and the mounting part 22 remains at the current height position.

[0064] In step S2, the lifting assembly 4 moves the mounting part 22 and the bushing upwards, leaving space below for the subsequent rotation and flipping of the bushing, preventing interference between the bushing and the worktable 85 or workbench 11 during the flipping process. During the upward movement, the second bevel gear 55 first contacts the first bevel gear 54 and rotates freely in the first direction. The lifting action stops only after full engagement. This process achieves smooth engagement of the bevel gears, avoiding rigid impact and tooth surface damage. The one-way transmission assembly 6 effectively isolates the power transmission between the second bevel gear 55 and the worm gear 53 during the upward movement, preventing unnecessary rotation of the clamping part 21 during engagement, which helps to ensure precise control of the subsequent flipping angle.

[0065] S3. Start the rotary drive source 51. The rotary drive source 51 drives the first bevel gear 54 to rotate in a second direction opposite to the first direction. The first bevel gear 54 drives the second bevel gear 55, which meshes with it, to rotate in the second direction. At this time, the rotation direction of the second bevel gear 55 is the second direction, and the one-way transmission component 6 is in the transmission state. The second bevel gear 55 drives the worm gear 53 to rotate synchronously through the locking engagement of the first arc-shaped limiting tooth 61 and the second arc-shaped limiting tooth 62. The worm gear 53 drives the worm wheel 52 to rotate. The worm wheel 52 drives the clamping part 21 to rotate around the horizontal axis through the first rotating shaft 24, the guide block 28 and the second rotating shaft 25, thereby causing the clamping part 21 to drive the bushing to rotate around the horizontal axis. At the same time that the rotary drive source 51 drives the clamping part 21 to rotate, the lifting component 4 starts in the opposite direction, driving the mounting part 22 to move downward along the mounting frame 2. During descent, the second bevel gear 55 remains engaged with the first bevel gear 54, and the second bevel gear 55 continues to rotate in the second direction, continuously driving the worm 53, worm wheel 52, and clamping part 21 to rotate through the one-way transmission assembly 6. When the mounting part 22 descends to the initial position, the lifting assembly 4 stops operating. At this time, the clamping part 21 drives the bushing to rotate exactly 180°, with the second end of the bushing facing upward and the first end facing downward.

[0066] In step S3, while the rotary drive source 51 drives the clamping part 21 to rotate, the lifting assembly 4 moves the mounting part 22 downward, so that the rotation and descent of the bushing are synchronized. By reasonably setting the coordination between the rotation speed of the rotary drive source 51 and the descent speed of the lifting assembly 4, the bushing completes the remaining angle flip during the descent, realizing the coordinated linkage of lifting and rotation. This fully utilizes the descent stroke of the lifting assembly 4 to complete the flipping action, which helps to shorten the flipping time and improve processing efficiency. At the same time, since the clamping part 21 keeps the bushing clamped and fixed throughout the entire process from S1 to S3, the flipping can be completed without releasing the clamp, avoiding the positioning error caused by secondary clamping and positioning.

[0067] S4. Start the grinding equipment 12. The grinding wheel spindle in the grinding equipment 12 drives the grinding wheel to rotate at high speed. The grinding wheel is driven to move to the second end of the bushing through the feed system of the grinding equipment 12. The outer cylindrical surface and inner wall of the second end of the bushing are ground until the second end reaches the predetermined processing size and surface roughness requirements. Since the clamping position of the bushing does not change during the flipping process, the axial position of the bushing remains consistent before and after the flipping. Therefore, the positioning reference during the processing of the second end is the same as the positioning reference during the processing of the first end, effectively ensuring the consistency of the grinding effect at both ends.

[0068] Throughout the entire process from S1 to S4, the clamping part 21 maintains continuous clamping of the bushing. That is, from the initial clamping of the bushing until the grinding of both ends is completed, the clamping part 21 always clamps the bushing with a constant clamping force and does not perform any loosening or re-clamping operations.

[0069] By maintaining the clamping part 21 in continuous clamping of the bushing throughout the entire processing, the cumbersome operation of releasing the clamp, manually flipping, and re-clamping the bushing during rotation, as required in the prior art, is avoided. This eliminates the positioning error introduced by the secondary clamping and positioning, effectively ensuring the coaxiality and dimensional consistency of the bushing after grinding at both ends, and is conducive to improving the overall accuracy of bushing grinding.

[0070] In S2, before the second bevel gear 55 meshes with the first bevel gear 54, during the process of the lifting assembly 4 driving the mounting part 22 to move upward, the second bevel gear 55 first contacts the first bevel gear 54 and rotates relative to the worm gear 53 in the first direction. After the second bevel gear 55 and the first bevel gear 54 are fully meshed, the lifting assembly 4 stops operating.

[0071] In S3, after the clamping part 21 drives the bushing to rotate by an angle a, the lifting assembly 4 drives the mounting part 22 to move downward. The second bevel gear 55 and the first bevel gear 54 remain meshed and continue to rotate in the second direction. During the descent of the mounting part 22, the clamping part 21 continues to rotate by an angle b, and a+b=180°, so that the bushing rotates 180° when the descent is completed.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic grinding device for cemented carbide bushings, comprising a device body (1), wherein a worktable (11) and a grinding device (12) are provided on the device body (1), characterized in that: Two mounting brackets (2) are slidably arranged on the workbench (11) in the horizontal direction. A drive assembly (8) is provided on the workbench (11). The drive assembly (8) is used to drive the two mounting brackets (2) to move toward each other or away from each other. Each mounting bracket (2) is provided with a clamping part (21). The main body (1) of the device is provided with a flipping device (3), which is used to flip the clamping part (21). The flipping device (3) includes a lifting component (4) and a rotating component (5). The lifting component (4) is used to drive the clamping part (21) to move in the vertical direction, and the rotating component (5) is used to drive the clamping part (21) to rotate.

2. The automatic grinding device for cemented carbide bushings according to claim 1, characterized in that: The rotating assembly (5) includes a rotating drive source (51), a worm gear (52) and a worm (53). The mounting frame (2) is provided with a mounting part (22). A mounting shaft (23) is rotatably provided on the mounting part (22). One end of the mounting shaft (23) is fixedly connected to the clamping part (21), and the other end is coaxially fixedly connected to the worm gear (52). A first frame (13) is provided on the worktable (11). The worm (53) is rotatably provided on the first frame (13). The worm (53) meshes with the worm gear (52). The worm (53) is connected to the output end of the rotating drive source (51) for transmission.

3. The automatic grinding device for carbide bushings according to claim 2, characterized in that: The workbench (11) is provided with a second frame (14), the rotary drive source (51) is provided on the second frame (14), the output end of the rotary drive source (51) is coaxially fixedly sleeved with a first bevel gear (54), the end of the worm (53) away from the worm wheel (52) is coaxially sleeved with a second bevel gear (55), the axes of the first bevel gear (54) and the second bevel gear (55) are perpendicular to each other, the worm (53) and the second bevel gear (55) are connected by a one-way transmission assembly (6), the mounting part (22) is slidably disposed on the mounting frame (2) in the vertical direction, and the lifting assembly (4) is used to drive the mounting part (22) to move on the mounting frame (2).

4. The automatic grinding device for cemented carbide bushings according to claim 3, characterized in that: The one-way transmission assembly (6) includes a first arc-shaped limiting tooth (61) and a second arc-shaped limiting tooth (62). A transmission groove (63) is provided on the second bevel gear (55). One end of the worm (53) is rotatably disposed in the transmission groove (63). Multiple first arc-shaped limiting teeth (61) are provided, and multiple first arc-shaped limiting teeth (61) are evenly fixed on the inner peripheral wall of the transmission groove (63). The end of the worm (53) is along the worm (53) At least one mounting base (64) is fixedly provided on the axis. The second arc-shaped limiting tooth (62) is rotatably provided on the mounting base (64). An elastic element (65) is provided on the mounting base (64). The elastic element (65) acts on the second arc-shaped limiting tooth (62), causing the second arc-shaped limiting tooth (62) to have a tendency to deflect toward the first arc-shaped limiting tooth (61). The convex surface of the first arc-shaped limiting tooth (61) abuts against the convex surface of the second arc-shaped limiting tooth (62).

5. The automatic grinding device for carbide bushings according to claim 4, characterized in that: The mounting bracket (2) has a mounting groove (7) and the mounting part (22) is slidably disposed in the mounting groove (7). The side wall of the mounting groove (7) has a sliding groove (71) in the vertical direction. The side wall of the mounting part (22) has a slider (72) fixedly disposed in the sliding groove (71). The slider (72) is slidably disposed in the sliding groove (71). The lifting assembly (4) includes a lifting screw (41) and a lifting drive source (42). The lifting drive source (42) is fixedly disposed on the mounting bracket (2). The lifting screw (41) is rotatably disposed in the sliding groove (71). The slider (72) is threadedly sleeved on the lifting screw (41). The lifting screw (41) is connected to the output end of the lifting drive source (42).

6. The automatic grinding device for cemented carbide bushings according to claim 2, characterized in that: The mounting shaft (23) includes a first rotating shaft (24) and a second rotating shaft (25). The first rotating shaft (24) is rotatably mounted on the first frame (13). One end of the first rotating shaft (24) is coaxially fixedly connected to the worm gear (52). A slot (26) is provided at the end of the first rotating shaft (24) away from the worm gear (52) along the axial direction of the first rotating shaft (24). The second rotating shaft (25) slides through the slot (26) and is rotatably mounted on the mounting part (22). The clamping part (21) is fixedly mounted at the end of the second rotating shaft (25) away from the slot (26).

7. The automatic grinding device for carbide bushings according to claim 6, characterized in that: A guide groove (27) is provided on the inner wall of the slot (26) along the length direction of the slot (26). A guide block (28) is slidably arranged in the guide groove (27). The guide block (28) is fixedly connected to the second rotating shaft (25). A through hole (29) is provided on the mounting part (22) for the second rotating shaft (25) to pass through. An annular groove is provided on the inner wall of the through hole (29). An annular block is rotatably arranged in the annular groove. The annular block is fixedly connected to the second rotating shaft (25).

8. The automatic grinding device for cemented carbide bushings according to claim 1, characterized in that: The drive assembly (8) includes a horizontal drive source (81) and a horizontal lead screw (82). An adjustment groove (83) is provided on the worktable (11). Two adjustment blocks (84) are slidably arranged in the adjustment groove (83). The two adjustment blocks (84) are fixedly connected to the two mounting brackets (2) one by one. The horizontal lead screw (82) is rotatably inserted into the adjustment groove (83). The two ends of the horizontal lead screw (82) are provided with threaded grooves with opposite directions of rotation. The two adjustment blocks (84) are respectively threaded onto the two ends of the horizontal lead screw (82). The horizontal drive source (81) is set on the worktable (11). The horizontal lead screw (82) is connected to the output end of the horizontal drive source (81) for transmission.

9. The automatic grinding device for cemented carbide bushings according to claim 8, characterized in that: A worktable (85) is fixedly installed in the middle of the adjustment groove (83). The worktable (85) is used to place the bushing to be processed. The top of the worktable (85) is flush with the top of the worktable (11). The horizontal lead screw (82) is rotatably inserted through the worktable (85).

10. An automatic grinding method for cemented carbide bushings, characterized in that, The operation using the automatic grinding device for carbide bushings as described in any one of claims 1-9 comprises the following steps: S1. Place the bushing to be processed on the worktable (85), drive the two mounting brackets (2) to move closer to each other through the drive assembly (8), so that the clamping part (21) clamps and fixes the bushing, and start the grinding equipment (12) to grind the first end of the bushing. S2. Start the lifting assembly (4) to drive the mounting part (22) to move upward along the mounting frame (2) so that the second bevel gear (55) meshes with the first bevel gear (54); S3. Start the rotary drive source (51) to drive the first bevel gear (54) to rotate. Through the one-way transmission assembly (6), the worm (53), worm wheel (52) and mounting shaft (23) are driven to rotate, so that the clamping part (21) drives the bushing to rotate around the horizontal axis. At the same time, the lifting assembly (4) drives the mounting part (22) to move downward until the clamping part (21) drives the bushing to rotate 180°, so that the second end of the bushing faces upward. S4. Start the grinding equipment (12) to grind the second end of the bushing; Throughout the entire process from S1 to S4, the clamping part (21) maintains continuous clamping of the bushing.

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