Internal grinding machine with clamping structure and method

Abstract

The invention discloses an internal grinding machine with a clamping structure and a method, and relates to the technical field of internal grinding machines, the internal grinding machine comprises a workbench, a clamping disc is arranged on one side of the upper end of the workbench, a first sliding table is arranged at the upper end of the workbench, and a grinding machine mechanism is arranged at the upper end of the first sliding table. Precise feeding of the grinding head is achieved through sliding of the supporting frame along the first sliding table, the driving piece drives the shaft pipe to rotate, then the gear-shaped connecting shaft clamped with the shaft pipe is driven to rotate synchronously, the gear-shaped connecting shaft is allowed to slide in the shaft pipe in the axial direction, and the grinding head is installed in the shaft pipe to be fixed before grinding; if detection equipment in the supporting frame recognizes vibration of the grinding head, the pushing rod is triggered to act, the bearing sleeve, the connecting cylinder and the sleeve shaft are sequentially driven to axially move in the sleeve, and therefore the length of the part, stretching out of the shaft nozzle, of the grinding head rod is dynamically adjusted, the stretching length and the inherent frequency of the grinding head rod are changed, and the resonance area is avoided to restrain same-frequency vibration.

Description

Technical Field

[0001] This invention relates to the field of internal grinding machine technology, and particularly to an internal grinding machine and method with a clamping structure. Background Technology

[0002] For example, the patent with publication number CN113182949B, entitled "A Vertical Deep Hole Internal Grinding Machine", includes a grinding machine base, on which a workpiece driving mechanism is provided. The workpiece driving mechanism includes a rotating base, and a workpiece centering center seat is provided in the center of the rotating base. This invention adopts a solution for a vertical deep hole internal grinding machine for aircraft landing gear sleeve-type workpieces with large length-to-diameter ratio and irregular shape, and has the characteristics of high processing accuracy and high quality.

[0003] Cast-formed workpieces often have problems such as uneven allowance, irregular contour, and large roundness error in their inner circle. If they are directly precision ground, the grinding head is difficult to fit the actual inner wall, which can easily lead to local over-grinding or under-grinding. Especially in the precision grinding of deep hole inner circles, the grinding head rod has a long overhang and low rigidity, which can easily induce resonance at a specific speed, such as vibration at one-time frequency caused by the imbalance of the grinding wheel, which can lead to surface ripples, chatter, or even grinding wheel chipping. Therefore, this application provides an internal cylindrical grinding machine and method with a clamping structure to meet the requirements. Summary of the Invention

[0004] The purpose of this application is to provide an internal grinding machine and method with a clamping structure, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: an internal grinding machine with a clamping structure, including a worktable, a clamping plate is provided on one side of the upper end of the worktable, a first slide is provided at the upper end of the worktable, and a grinding mechanism is provided at the upper end of the first slide. The grinding mechanism is used to perform fine grinding on the inner circle of the workpiece and eliminate the synchronous vibration of the grinding head. A second slide is provided at the upper end of the first slide and on the side near the clamping plate. A driving device is provided at the upper end of the second slide, and a grinding assembly is provided on one side of the driving device. The grinding assembly is internally equipped with a grinding component for preliminary grinding of the inner circle of the workpiece. The outer surface of the grinding assembly is provided with several measuring components, which are arranged in a ring array and their diameters decrease sequentially from large to small. These components are used to detect the inner circle contour of workpieces of different sizes and to assist the grinding machine mechanism in grinding.

[0006] The grinding assembly includes a chassis, which is fixedly mounted on the output end of the drive device. The inner wall of the chassis is provided with a sliding groove, and a push rod is provided on one side of the sliding groove. The outer surface of the chassis has multiple mounting slots arranged in a circular array with diameters decreasing sequentially. Limiting components are installed on the inner walls of the multiple mounting slots. A drive motor is provided at the bottom of the limiting component, and a gear is fixedly mounted on the output end of the drive motor. The bottom of the limiting component has toothed holes corresponding to the positions of the gears.

[0007] The grinding component includes a slider, which is slidably installed inside the slide groove. A fixing groove is provided inside the slider, and an arc-shaped block is installed inside the fixing groove. A grinding block is provided at the bottom of the arc-shaped block, and a number of equally spaced slots are provided on the outer surface of the arc-shaped block.

[0008] The arc-shaped block is crescent-shaped, and a polishing stone is slidably installed inside the slot. A spring is provided at the bottom of the polishing stone.

[0009] The measuring component includes a sliding plate, which is slidably installed inside the limiting member. The bottom of the sliding plate has a toothed groove, which meshes with a gear. The upper end of the sliding plate is provided with an arc plate, and a nozzle is installed on one side of the arc plate. The arc plate has a hollow structure inside, and a blower pipe is connected to one side of the arc plate.

[0010] The inner wall of the arc plate is provided with an inner arc component, a ventilation pipe is provided on one side of the inner arc component, multiple partitions are provided on the inner wall of the inner arc component, and a detection box is provided at both ends of the inner arc component, and a contact rod is provided inside the detection box.

[0011] The grinding machine mechanism includes a support frame, which is slidably mounted on the upper end of the first slide. A driving component is provided on one side of the support frame, and a shaft tube is provided inside the driving component. A sleeve is provided inside the support frame and is sleeved on the outside of the shaft tube.

[0012] The grinding mechanism further includes a bearing sleeve. The outer surface of the bearing sleeve is provided with a plurality of push rods arranged in a circular array. One end of each push rod is rotatably mounted on one side of the support frame. The inner wall of the bearing sleeve is provided with a connecting cylinder. A sleeve shaft and a rubber sleeve are fitted on one side of the outer surface of the connecting cylinder. One end of the connecting cylinder is connected to a connecting shaft, which is slidably mounted inside the shaft tube.

[0013] One end of the connecting cylinder is connected to a shaft nozzle, and the outer surface of the shaft nozzle is fitted with a magnetic flux shell. The inner wall of the magnetic flux shell is provided with several diverter plates arranged in a ring array.

[0014] The present invention also provides a method for grinding the inner circle, the specific grinding method being as follows: Step 1: Install the workpiece inside the clamping plate. The drive device slides along the upper end of the second slide, driving the grinding assembly to move to a position that coincides with the inner circle axis of the workpiece. Then, the drive device drives the grinding assembly to rotate, thereby driving the grinding assembly to pre-grind the inner circle of the workpiece. Step 2: After the workpiece has been pre-grinded, adjust the position of the grinding assembly so that the measuring assembly extends into the inner circle of the workpiece and makes contact with the inner circle wall to perform a preliminary inspection of the inner circle profile of the workpiece. Step 3: The grinding mechanism slides along the upper end of the first slide, inserts the grinding head into the interior of the measuring component, and contacts the inner wall of the workpiece. At this time, the clamping plate drives the workpiece to rotate, and the measuring component assists the grinding mechanism in fine grinding the inner circle of the workpiece based on the previous detection data.

[0015] In summary, the technical effects and advantages of this invention are as follows: 1. This invention uses a push rod to drive a slider to slide inside a groove. The radial position of the slider can be flexibly adjusted according to the inner diameter of the workpiece, ensuring that the grinding stone always effectively contacts the inner wall of different sizes. Combined with an arc-shaped block, the fit between the grinding stone and the inner wall contour of the workpiece is further improved, ensuring uniform grinding. When machining the outer circle, it is only necessary to switch to using a grinding block to fit the outer wall of the workpiece, realizing a quick switch between inner and outer circle grinding functions. During the inner circle grinding process, the drive device drives the chassis to rotate, and the chassis drives the slider to rotate synchronously through the groove, thereby driving the grinding stone to perform preliminary grinding on the inner circle of the workpiece. At the same time, the spring set at the bottom of the grinding stone provides elastic preload, so that even when the inner circle of the cast workpiece has non-roundness or local dimensional fluctuations, it can still maintain stable contact pressure, effectively avoiding grinding omissions or pressure sudden changes caused by gaps.

[0016] 2. This invention uses a grinding assembly to move the grinding component out of the processing area, effectively avoiding structural interference with subsequent fine grinding processes. Then, based on the specific dimensions of the workpiece's inner circle, the grinding assembly automatically selects a matching arc plate. By starting the drive motor, the gear rotates, meshing with the tooth groove, thereby pushing the sliding plate within the limiting component and precisely pushing the arc plate into the workpiece's inner circle, providing reliable support for inspection or auxiliary positioning. During the fine grinding stage, the position of the grinding machine mechanism is adjusted so that the grinding head can smoothly extend into the workpiece's inner circle for high-precision machining. Simultaneously, the air blower... Compressed air is sent into the arc plate, and the airflow is directed out after being guided by the nozzle, which cools the grinding area and blows away the floating chips. At the same time, the ventilation pipe draws air from the inside of the arc-shaped inner arc part covering the outside of the grinding head. The resulting negative pressure airflow is carried away by the guide of the partition and carries away the chips generated during the grinding process, preventing chip accumulation from causing scratches, blockages or secondary abrasive damage. In addition, the contact rod in the existing technology is used to press against the inner wall of the workpiece, and the pressure on it is detected in real time by the detection box. This allows for an accurate assessment of the contour state, allowance distribution and grinding uniformity of the inner circle after the initial grinding.

[0017] 3. This invention achieves precise feeding of the grinding head by sliding the support frame along the first slide. The driving component drives the shaft tube to rotate, which in turn drives the gear-shaped connecting shaft that engages with it to rotate synchronously, allowing it to slide axially within the shaft tube. Before grinding, the grinding head is installed and fixed in the shaft tube. When the grinding head contacts the inner wall of the workpiece to begin operation, if the detection device inside the support frame detects the vibration of the grinding head, it triggers the push rod to move, sequentially driving the bearing sleeve, connecting sleeve, and sleeve shaft to move axially within the sleeve, thereby dynamically adjusting the length of the grinding head rod extending beyond the shaft nozzle and changing the extension length of the grinding head rod. The degree and natural frequency are avoided to suppress resonance and vibration at the same frequency. At the same time, the grinding head rod that runs through the connecting cylinder and the connecting shaft is provided with radial support and positioning by the connecting cylinder to prevent sway. The rubber sleeve set on its outer periphery can absorb the vibration force transmitted to the surface of the connecting cylinder, further reducing the vibration amplitude. In addition, the outer periphery of the shaft nozzle that rotates synchronously with the connecting cylinder is fitted with a magnetic fluid shell filled with magnetic fluid. The internal flow divider plate ensures that the magnetic fluid is evenly distributed during rotation. When the vibration energy is transmitted to the inner wall of the magnetic fluid shell through the shaft nozzle, the magnetic fluid efficiently absorbs and dissipates the vibration energy through the shear damping effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of an internal grinding machine; Figure 2This is a partial first-view three-dimensional structural diagram of an internal grinding machine; Figure 3 This is a partial second-view three-dimensional structural diagram of an internal cylindrical grinding machine; Figure 4 This is a partial third-view 3D structural diagram of an internal cylindrical grinding machine. Figure 5 This is a partial fourth-view three-dimensional structural diagram of an internal cylindrical grinding machine. Figure 6 This is a schematic diagram of the three-dimensional connection structure of the grinding assembly; Figure 7 A schematic diagram of the three-dimensional connection structure of the drilling assembly and the polishing assembly; Figure 8 A schematic diagram of the three-dimensional connection structure of the polishing components; Figure 9 Exploded view of the 3D connection structure of the polishing components; Figure 10 This is a schematic diagram of the three-dimensional connection structure of the arc-shaped blocks; Figure 11 A schematic diagram of the three-dimensional connection structure between the grinding assembly and the measuring assembly; Figure 12 A first-view stereoscopic connection structure diagram of the measurement components; Figure 13 A schematic diagram of the second-view stereo connection structure of the measurement component; Figure 14 A schematic diagram of the third-view stereo connection structure of the measurement component; Figure 15 A schematic diagram of the three-dimensional connection structure of the detection box and the contact rod; Figure 16 A schematic diagram of the three-dimensional connection structure between the grinding machine mechanism and the first slide; Figure 17 This is a schematic diagram of the three-dimensional connection structure of the grinding machine mechanism; Figure 18 This is a three-dimensional sectional view of the connection structure of the grinding machine mechanism; Figure 19 A first-view three-dimensional connection structure diagram of the magnetic fluid shell and the connecting shaft; Figure 20 A second-view three-dimensional connection structure diagram of the magnetic fluid shell and the connecting shaft; Figure 21 This is an exploded view of the three-dimensional connection structure of the grinding machine mechanism.

[0020] In the diagram: 1. Worktable; 2. Clamping plate; 3. Grinding assembly; 31. Base plate; 32. Mounting slot; 33. Limiting component; 34. Toothed hole; 35. Gear; 36. Drive motor; 37. Slide rail; 38. Push rod; 4. First slide; 5. Grinding mechanism; 51. Drive component; 53. Support frame; 54. Shaft tube; 55. Push rod; 56. Bearing sleeve; 57. Sleeve; 58. Connecting shaft; 59. Sleeve shaft; 511. Rubber sleeve; 512. Magnetorheological flux 513. Shell; 514. Connecting cylinder; 515. Shaft nozzle; 516. Diverter plate; 6. Second slide; 7. Measuring assembly; 71. Arc plate; 72. Sliding plate; 73. Gear groove; 74. Ventilation pipe; 75. Air nozzle; 76. Detection box; 77. Contact rod; 78. Inner arc component; 79. Partition; 80. Grinding assembly; 81. Slider; 82. Grinding block; 83. Arc block; 84. Fixing groove; 85. Slot; 86. Spring; 87. Grinding stone; 9. Drive device. Detailed Implementation

[0021] 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.

[0022] Example 1, Reference Figures 1 to 21 The internal grinding machine with a clamping structure shown includes a worktable 1, a clamping plate 2 is provided on one side of the upper end of the worktable 1, a first slide 4 is provided at the upper end of the worktable 1, and a grinding mechanism 5 is provided at the upper end of the first slide 4. The grinding mechanism 5 is used to perform fine grinding on the inner circle of the workpiece and eliminate the synchronous vibration of the grinding head. A second slide 6 is provided at the upper end of the first slide 4 and on the side close to the clamping plate 2. A driving device 9 is provided at the upper end of the second slide 6, and a grinding assembly 3 is provided on one side of the driving device 9. The grinding assembly 3 is internally equipped with a grinding assembly 8 for preliminary grinding of the inner circle of the workpiece; The outer surface of the grinding assembly 3 is provided with several measuring components 7, which are arranged in a ring array and whose diameters decrease from large to small. They are used to detect the inner circle contour of workpieces of different sizes and to assist the grinding machine mechanism 5 in grinding.

[0023] It is worth noting that when the workpiece is installed inside the clamping plate 2, since the inner circle surface of the cast workpiece is uneven, it needs to be pre-roughly ground first. The drive device 9 slides along the upper end of the second slide table 6, driving the grinding hole assembly 3 to move to a position that coincides with the inner circle axis of the workpiece. Then the drive device 9 drives the grinding hole assembly 3 to rotate, thereby driving the grinding assembly 8 to pre-grind the inner circle of the workpiece. After the workpiece has been pre-grinded, the position of the grinding hole assembly 3 is adjusted so that the measuring assembly 7 extends into the inner circle of the workpiece and contacts the inner circle wall to perform a preliminary inspection of the inner circle profile of the workpiece. The grinding mechanism 5 slides along the upper end of the first slide table 4, inserts the grinding head into the interior of the measuring component 7, and contacts the inner wall of the workpiece. At this time, the clamping plate 2 drives the workpiece to rotate, and the measuring component 7 assists the grinding mechanism 5 in fine grinding the inner circle of the workpiece based on the previous detection data.

[0024] Example 2: This example provides a further technical solution for the grinding assembly 3 and the polishing assembly 8.

[0025] The grinding assembly 3 includes a chassis 31, which is fixedly installed at the output end of the drive device 9. The inner wall of the chassis 31 is provided with a sliding groove 37, and a push rod 38 is provided on one side of the sliding groove 37. The outer surface of the chassis 31 is provided with multiple mounting grooves 32 arranged in a ring array and with diameters decreasing sequentially. Limiting members 33 are installed on the inner walls of the multiple mounting grooves 32. A drive motor 36 is provided at the bottom of the limiting member 33, and a gear 35 is fixedly installed at the output end of the drive motor 36. A toothed hole 34 corresponding to the position of the gear 35 is provided at the bottom of the limiting member 33.

[0026] The grinding assembly 8 includes a slider 81, which is slidably installed inside the slide groove 37. A fixing groove 84 is provided inside the slider 81, and an arc-shaped block 83 is installed inside the fixing groove 84. A grinding block 82 is provided at the bottom of the arc-shaped block 83, and a number of equally spaced slots 85 are provided on the outer surface of the arc-shaped block 83. The arc-shaped block 83 is crescent-shaped, and a polishing stone 87 is slidably installed inside the slot 85. A spring 86 is provided at the bottom of the polishing stone 87.

[0027] It is worth noting that when grinding the inner circle of a workpiece, the position of the slider 81 can be adjusted according to the diameter of the inner circle of the workpiece. The slider 81 is driven to slide inside the groove 37 by the push rod 38, thereby adjusting the radial position of the slider 81 to adapt to the inner circle of workpieces with different diameters, so that the grinding stone 87 can contact the inner wall of the workpiece. The arc block 83 is arc-shaped, which allows the grinding stone 87 to better fit the inner wall contour of the workpiece and improve the uniformity of grinding. When it is necessary to grind the outer circle of the workpiece, simply attach the grinding block 82 to the outer wall of the workpiece. During the grinding process of the inner circle of the workpiece, the output end of the drive device 9 drives the chassis 31 to rotate. The chassis 31 drives the slider 81 to rotate synchronously through the sliding groove 37. Since the grinding stone 87 is already in contact with the inner wall of the workpiece, the inner circle of the workpiece can be initially ground. In addition, the bottom of the grinding stone 87 is provided with a spring 86, which provides elastic preload to ensure that the grinding stone 87 is always in close contact with the inner wall of the workpiece. Even if there is slight non-roundness or dimensional fluctuation in the inner circle, it can still maintain stable contact pressure and ensure the grinding effect.

[0028] The push rod 38 drives the slider 81 to slide inside the groove 37. The radial position of the slider 81 can be flexibly adjusted according to the inner diameter of the workpiece, so that the grinding stone 87 can always effectively contact the inner wall of different sizes. With the arc-shaped block 83, the fit between the grinding stone 87 and the inner wall of the workpiece is further improved, ensuring the uniformity of grinding. When the outer circle needs to be processed, it is only necessary to switch to the grinding block 82 to fit the outer wall of the workpiece, realizing the quick conversion of inner and outer circle grinding functions. During the inner circle grinding process, the drive device 9 drives the chassis 31 to rotate. The chassis 31 drives the slider 81 to rotate synchronously through the groove 37, thereby driving the grinding stone 87 to perform preliminary grinding on the inner circle of the workpiece. At the same time, the spring 86 set at the bottom of the grinding stone 87 provides elastic preload, so that even when there is non-roundness or local dimensional fluctuation in the inner circle of the cast workpiece, it can still maintain stable contact pressure, effectively avoiding grinding omissions or pressure sudden changes caused by gaps.

[0029] Example 3: This example provides a further technical solution for the measurement component 7.

[0030] The measuring component 7 includes a sliding plate 72, which is slidably installed inside the limiting member 33. The bottom of the sliding plate 72 is provided with a toothed groove 73, and the sliding plate 72 meshes with the gear 35 through the toothed groove 73. An arc plate 71 is provided at the upper end of the sliding plate 72, and a nozzle 75 is installed on one side of the arc plate 71. The interior of the arc plate 71 is a hollow structure, and a blower pipe is connected to one side of the arc plate 71. The inner wall of the arc plate 71 is provided with an inner arc component 78, a ventilation pipe 74 is provided on one side of the inner arc component 78, multiple partitions 79 are provided on the inner wall of the inner arc component 78, and detection boxes 76 are provided at both ends of the inner arc component 78, and a contact rod 77 is provided inside the detection box 76.

[0031] It is worth noting that after the grinding component 8 completes the initial grinding of the inner circle of the workpiece, the grinding component 8 is moved by the grinding hole component 3 to remove it from the workpiece processing area, so as to avoid interference with the subsequent fine grinding process. Subsequently, based on the dimensions of the inner circle of the workpiece, the arc plate 71 that matches it is selected through the grinding assembly 3, and the drive motor 36 is started, which drives the gear 35 to rotate. The gear 35 meshes with the tooth groove 73, thereby pushing the sliding plate 72 to slide inside the limiting member 33 and pushing the arc plate 71 into the inner circle of the workpiece. Adjust the position of the grinding machine mechanism 5 so that its grinding head extends into the inner circle of the workpiece for fine grinding. At the same time, the blower pipe sends compressed air into the interior of the arc plate 71. The airflow is guided by the nozzle 75 and sprayed out in a direction. The ventilation pipe 74 is used to extract the air inside the inner arc part 78. The inner arc part 78 is arc-shaped and covers the outside of the grinding head. The extracted airflow is guided by the partition 79 and carries away the debris generated during the grinding process. Furthermore, the detection box 76 and the contact rod 77 are existing technologies, so they will not be described in detail here. The contact rod 77 abuts against the inner wall of the inner circle of the workpiece, and the detection box 76 is used to detect the pressure on the contact rod 77. Through the cooperation of the detection box 76 and the contact rod 77, the contour state and degree of grinding of the inner circle of the workpiece after preliminary grinding can be evaluated.

[0032] Among them, the grinding component 8 is moved out of the processing area by the grinding component 3, which effectively avoids structural interference with the subsequent fine grinding process. Then, according to the specific size of the inner circle of the workpiece, the grinding component 3 automatically selects the matching arc plate 71, and drives the gear 35 to rotate by starting the drive motor 36, so that the gear 35 meshes with the tooth groove 73, thereby pushing the sliding plate 72 to slide inside the limiting member 33, and accurately pushing the arc plate 71 into the inner circle of the workpiece, providing reliable support for detection or auxiliary positioning. During the fine grinding stage, the position of the grinding machine mechanism 5 is adjusted so that the grinding head can smoothly extend into the inner circle of the workpiece for high-precision machining. At the same time, the blower pipe sends compressed air into the arc plate 71. The airflow is guided by the nozzle 75 and sprayed out in a direction to cool the grinding area and blow away the floating chips. Meanwhile, the ventilation pipe 74 simultaneously draws air from the inside of the arc-shaped inner arc part 78 covered outside the grinding head. The resulting negative pressure airflow is guided by the partition 79 to carry away the chips generated during the grinding process, preventing chip accumulation from causing scratches, blockages or secondary abrasive damage. In addition, the contact rod 77 in the prior art is used to abut against the inner wall of the workpiece. With the cooperation of the detection box 76, the pressure it receives can be detected in real time, which can accurately assess the contour state, allowance distribution and grinding uniformity of the inner circle after the initial grinding.

[0033] Example 4: This example provides a further technical solution for the grinding machine mechanism 5.

[0034] The grinding mechanism 5 includes a support frame 53, which is slidably mounted on the upper end of the first slide table 4. A driving member 51 is provided on one side of the support frame 53. A shaft tube 54 is provided inside the driving member 51. A sleeve 57 is provided inside the support frame 53 and is sleeved on the outside of the shaft tube 54. The grinding mechanism 5 also includes a bearing sleeve 56. The outer surface of the bearing sleeve 56 is provided with a number of push rods 55 arranged in a ring array. One end of the push rod 55 is rotatably mounted on one side of the support frame 53. The inner wall of the bearing sleeve 56 is provided with a connecting sleeve 513. A sleeve shaft 59 and a rubber sleeve 511 are sleeved on one side of the outer surface of the connecting sleeve 513. One end of the connecting sleeve 513 is connected to a connecting shaft 58. The connecting shaft 58 is slidably mounted inside the shaft tube 54.

[0035] One end of the connecting cylinder 513 is connected to a shaft nozzle 514, and a magnetic flow shell 512 is sleeved on the outer surface of the shaft nozzle 514. The inner wall of the magnetic flow shell 512 is provided with several flow dividers 515 arranged in a ring array.

[0036] It is worth noting that when grinding the inner circle of the workpiece, the support frame 53 slides along the upper end of the first slide table 4, the driving component 51 drives the shaft tube 54 to rotate, and the shaft tube 54 in turn drives the connecting shaft 58 to rotate synchronously. The connecting shaft 58 is a gear structure that engages with the inner wall of the shaft tube 54 and can slide axially inside the shaft tube 54. Before grinding, the grinding head is inserted into and fixed inside the shaft tube 54. When the grinding head contacts the inner wall of the workpiece and grinding begins, if the detection device inside the support frame 53 detects vibration of the grinding head, it triggers the push rod 55 to move. The push rod 55 drives the bearing sleeve 56 to move. The bearing sleeve 56 drives the connecting cylinder 513 to move axially through its internal bearing. The connecting cylinder 513 then drives the connecting shaft 58 to slide inside the shaft tube 54. At the same time, the movement of the connecting cylinder 513 also drives the sleeve shaft 59 to slide inside the sleeve 57. With the axial displacement of the connecting cylinder 513, the extension length of the grinding head rod changes. That is, the length of the grinding head rod extending out of the shaft nozzle 514 is dynamically adjusted, thereby changing the natural frequency of the grinding head rod during the grinding process and realizing the active suppression of the synchronous vibration of the grinding head.

[0037] The grinding head rod passes through the connecting sleeve 513 and the connecting shaft 58. The connecting sleeve 513 is used to provide radial support and positioning for the grinding head rod to prevent the grinding head from vibrating during the grinding process. A rubber sleeve 511 is fitted around the outer periphery of the connecting sleeve 513 to absorb the vibration force transmitted from the surface of the connecting sleeve 513, thereby effectively suppressing the amplitude of the same frequency vibration of the grinding head. Furthermore, when the connecting cylinder 513 rotates, the shaft nozzle 514 fixedly connected to it rotates synchronously. A magnetic fluid shell 512 is fitted around the outer periphery of the shaft nozzle 514. The magnetic fluid shell 512 is filled with magnetic fluid. A flow divider 515 is provided inside the magnetic fluid shell 512 to make the magnetic fluid evenly distributed during rotation. When the grinding head vibrates, the vibration energy is transmitted to the inner wall of the magnetic fluid shell 512 through the shaft nozzle 514. The magnetic fluid in the magnetic fluid shell 512 absorbs and dissipates the vibration force through the shear damping effect, further improving the vibration suppression performance.

[0038] When grinding the inner circle of the workpiece, the grinding head is precisely fed by the support frame 53 sliding along the first slide table 4. The drive component 51 drives the shaft tube 54 to rotate, which in turn drives the gear-shaped connecting shaft 58 that is engaged with it to rotate synchronously and allows it to slide axially in the shaft tube 54. Before grinding, the grinding head is installed in the shaft tube 54 and fixed. When the grinding head contacts the inner wall of the workpiece and starts working, if the detection device inside the support frame 53 detects the vibration of the grinding head, it triggers the push rod 55 to move, which in turn drives the bearing sleeve 56, the connecting sleeve 513 and the sleeve shaft 59 to move axially in the sleeve 57, thereby dynamically adjusting the length of the grinding head rod extending out of the shaft nozzle 514, changing the extension length and natural frequency of the grinding head rod, avoiding the resonance area and suppressing the same frequency vibration. Meanwhile, the grinding head rod that passes through the connecting cylinder 513 and the connecting shaft 58 is provided with radial support and positioning by the connecting cylinder 513 to prevent swaying. The rubber sleeve 511 on its outer periphery can absorb the vibration force transmitted to the surface of the connecting cylinder 513, further reducing the vibration amplitude. In addition, the shaft nozzle 514 that rotates synchronously with the connecting cylinder 513 is fitted with a magnetic fluid shell 512 filled with magnetic fluid. The internal flow divider 515 ensures that the magnetic fluid is evenly distributed during rotation. When the vibration energy is transmitted to the inner wall of the magnetic fluid shell 512 through the shaft nozzle 514, the magnetic fluid efficiently absorbs and dissipates the vibration energy through the shear damping effect.

[0039] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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. An internal grinding machine with a clamping structure, comprising a worktable (1), wherein a clamping disc (2) is provided on one side of the upper end of the worktable (1), characterized in that: The upper end of the worktable (1) is provided with a first slide (4), and the upper end of the first slide (4) is provided with a grinding mechanism (5). The grinding mechanism (5) is used to fine grind the inner circle of the workpiece and eliminate the synchronous vibration of the grinding head. A second slide (6) is provided at the upper end of the first slide (4) and on the side close to the clamping plate (2). A driving device (9) is provided at the upper end of the second slide (6), and a grinding assembly (3) is provided on one side of the driving device (9). The grinding assembly (3) is provided with a grinding assembly (8) for preliminary grinding of the inner circle of the workpiece. The outer surface of the grinding assembly (3) is provided with several measuring components (7). The measuring components (7) are arranged in a ring array and their diameters decrease from large to small. They are used to detect the inner circle contour of workpieces of different sizes and to assist the grinding machine mechanism (5) in grinding.

2. The internal grinding machine with a clamping structure according to claim 1, characterized in that: The grinding assembly (3) includes a chassis (31), which is fixedly installed at the output end of the drive device (9). The inner wall of the chassis (31) is provided with a sliding groove (37), and a push rod (38) is provided on one side of the sliding groove (37). The outer surface of the chassis (31) is provided with multiple mounting grooves (32) arranged in a ring array and with diameters arranged from large to small. The inner walls of the multiple mounting grooves (32) are all equipped with limiting members (33). The bottom of the limiting member (33) is provided with a drive motor (36), and the output end of the drive motor (36) is fixedly installed with a gear (35). The bottom of the limiting member (33) is provided with a toothed hole (34) corresponding to the position of the gear (35).

3. An internal grinding machine with a clamping structure according to claim 1, characterized in that: The polishing assembly (8) includes a slider (81), which is slidably installed inside the slide groove (37). A fixing groove (84) is provided inside the slider (81), and an arc-shaped block (83) is installed inside the fixing groove (84). A polishing block (82) is provided at the bottom of the arc-shaped block (83), and a number of equally spaced slots (85) are provided on the outer surface of the arc-shaped block (83).

4. An internal grinding machine with a clamping structure according to claim 3, characterized in that: The arc-shaped block (83) is crescent-shaped, and a polishing stone (87) is slidably installed inside the slot (85). A spring (86) is provided at the bottom of the polishing stone (87).

5. An internal grinding machine with a clamping structure according to claim 2, characterized in that: The measuring component (7) includes a sliding plate (72), which is slidably installed inside the limiting member (33). The bottom of the sliding plate (72) is provided with a toothed groove (73), and the sliding plate (72) meshes with a gear (35) through the toothed groove (73). An arc plate (71) is provided at the upper end of the sliding plate (72), and a nozzle (75) is installed on one side of the arc plate (71). The interior of the arc plate (71) is a hollow structure, and a blower pipe is connected to one side of the arc plate (71).

6. An internal grinding machine with a clamping structure according to claim 5, characterized in that: The inner wall of the arc plate (71) is provided with an inner arc component (78), a ventilation pipe (74) is provided on one side of the inner arc component (78), a plurality of partitions (79) are provided on the inner wall of the inner arc component (78), and a detection box (76) is provided at both ends of the inner arc component (78), and a touch rod (77) is provided inside the detection box (76).

7. An internal grinding machine with a clamping structure according to claim 1, characterized in that: The grinding mechanism (5) includes a support frame (53), which is slidably mounted on the upper end of the first slide (4). A drive member (51) is provided on one side of the support frame (53), and a shaft tube (54) is provided inside the drive member (51). A sleeve (57) is provided inside the support frame (53), and the sleeve (57) is sleeved on the outside of the shaft tube (54).

8. An internal grinding machine with a clamping structure according to claim 7, characterized in that: The grinding mechanism (5) also includes a bearing sleeve (56). The outer surface of the bearing sleeve (56) is provided with a plurality of push rods (55) arranged in a ring array. One end of the push rod (55) is rotatably mounted on one side of the support frame (53). The inner wall of the bearing sleeve (56) is provided with a connecting sleeve (513). One side of the outer surface of the connecting sleeve (513) is fitted with a sleeve shaft (59) and a rubber sleeve (511). One end of the connecting sleeve (513) is connected to a connecting shaft (58). The connecting shaft (58) is slidably mounted inside the shaft tube (54).

9. An internal grinding machine with a clamping structure according to claim 8, characterized in that: One end of the connecting cylinder (513) is connected to a shaft nozzle (514), and a magnetic flow shell (512) is sleeved on the outer surface of the shaft nozzle (514). The inner wall of the magnetic flow shell (512) is provided with a number of diverter plates (515) arranged in a ring array.

10. An internal grinding method, employing an internal grinding machine with a clamping structure as described in any one of claims 1-9, characterized in that, The specific polishing method is as follows: Step 1: Install the workpiece inside the clamping plate (2), and slide it along the upper end of the second slide (6) through the drive device (9) to move the grinding assembly (3) to a position that coincides with the inner circle axis of the workpiece. Then, the drive device (9) drives the grinding assembly (3) to rotate, thereby driving the grinding assembly (8) to perform pre-grinding on the inner circle of the workpiece. Step 2: After the workpiece has been pre-grinded, adjust the position of the grinding assembly (3) so that the measuring assembly (7) extends into the inner circle of the workpiece and contacts the inner circle wall through the measuring assembly (7) to perform a preliminary inspection of the inner circle profile of the workpiece. Step 3: The grinding mechanism (5) slides along the upper end of the first slide (4) and inserts the grinding head into the interior of the measuring component (7) and contacts the inner wall of the workpiece. At this time, the clamping plate (2) drives the workpiece to rotate, and the measuring component (7) assists the grinding mechanism (5) in fine grinding the inner circle of the workpiece based on the previous detection data.

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