An automated grinding apparatus for valve stems

Abstract

The application is suitable for the technical field of workpiece grinding, and provides an automatic grinding equipment for valve rods, which comprises a cabinet body, two displacement oil cylinders are fixedly installed in the cabinet body, two supporting sliding plates are slidingly installed on the top of the cabinet body, and the two supporting sliding plates are fixedly connected with the output rods of the two displacement oil cylinders respectively. The circle measuring mechanism and the grinding mechanism of the automatic grinding equipment for valve rods are integrally installed in the same assembly shell, move synchronously along the transverse moving screw rod with the lifting shell, realize the real-time cooperation of grinding and roundness measurement, the circle measuring mechanism moves synchronously with the grinding operation, continuously and dynamically measures the valve rod, replaces the traditional needle jumping point sampling inspection mode, eliminates the measurement blind area, realizes the full coverage real-time monitoring of the machining process, adjusts the grinding parameters or compensates the feed amount based on the real-time circle measuring data, avoids repeated machining, significantly improves the machining efficiency and the product qualification rate, and guarantees that the roundness precision of the valve rod meets the design requirements.

Description

Technical Field

[0001] This invention belongs to the field of workpiece grinding technology, and particularly relates to an automated grinding equipment for valve stems. Background Technology

[0002] Turning valve stems on a lathe typically involves three stages: rough turning, finish turning, and machining accuracy inspection. Rough turning shapes the stem body, giving it its initial profile. Finish turning involves meticulous machining to eliminate surface irregularities and ensure surface quality. Finally, the machining accuracy is inspected to ensure it meets design requirements. Since milling often produces burrs and scratches that affect surface quality, grinding is necessary. Grinding offers advantages such as high precision and high efficiency, playing a crucial role in improving quality.

[0003] Currently, when grinding valve stems, some personnel use a jumper needle for inspection. However, the jumper needle cannot move with the grinding operation, and spot checks are performed before or after processing, resulting in poor measurement accuracy and an inability to perform comprehensive and real-time measurements of the valve stem, thus requiring repeated processing. Summary of the Invention

[0004] This invention provides an automated grinding device for valve stems, which aims to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention provides an automated grinding device for valve stems, comprising: a cabinet, in which two displacement cylinders are fixedly installed; two support slide plates are slidably installed on the top of the cabinet, and the two support slide plates are respectively fixedly connected to the output rods of the two displacement cylinders to allow the two support slide plates to slide relative to each other; a turntable located above the cabinet is rotatably mounted on each of the two support slide plates; a three-jaw chuck is fixedly installed on one side of each of the two turntables, and the two three-jaw chucks are used to clamp and fix the valve stem; a chuck rotary motor is fixedly installed on one of the support slide plates, and the output shaft of the chuck rotary motor is fixedly connected to the corresponding turntable. The device is used to drive the three-jaw chuck to rotate, thereby driving the valve stem to rotate. Two support frames are fixedly installed on the top of the cabinet. The top of the two support frames is fixedly installed with the same top plate. The same transverse sliding screw is rotatably installed on the two support frames. The transverse sliding screw is parallel to the lower valve stem. A lifting housing is threaded onto the transverse sliding screw. The top of the lifting housing is slidably connected to the bottom of the top plate. A lifting column is installed at the bottom of the lifting housing. An assembly housing is fixedly installed at the bottom end of the lifting column. A grinding mechanism and a roundness measuring mechanism are installed on the assembly housing. The grinding mechanism is used to grind the lower valve stem, and the roundness measuring mechanism is used to measure the roundness of the lower valve stem.

[0006] Preferably, the grinding mechanism includes a grinding adjustment cylinder fixedly installed on the top of the assembly housing. The output rod of the grinding adjustment cylinder is vertically downward and fixedly mounted with a connecting seat. A rectangular rod is rotatably mounted on the bottom of the connecting seat. A connecting plate is fixedly mounted on the bottom end of the rectangular rod. A grinding disc is fixedly mounted on the bottom of the connecting plate for grinding the valve stem during rotation. A transmission cylinder is rotatably mounted on the bottom of the assembly housing. The transmission cylinder is slidably sleeved on the rectangular rod, and the two rotate synchronously. A power motor is fixedly installed inside the assembly housing. Both the output shaft of the power motor and the transmission cylinder are fixedly sleeved with bevel gears, and the two bevel gears mesh with each other.

[0007] Preferably, the circularity measuring mechanism includes a measuring and adjusting cylinder fixedly installed on the top of the assembly housing. The output rod of the measuring and adjusting cylinder is vertically downward and fixedly installed on the assembly housing. The assembly housing slides through the bottom of the assembly housing. A height sensor is fixedly installed inside the assembly housing. The trigger end of the height sensor is vertically downward. A height trigger rod is slidably installed inside the assembly housing. The top end of the height trigger rod contacts the trigger end of the height sensor. The bottom end of the height trigger rod extends to the outside of the bottom of the assembly housing and is fixedly installed with a ball head for contacting the valve stem. When the valve taps, it triggers the height sensor. A synchronization ring is fixedly sleeved on the height trigger rod. A spring is slidably sleeved on the height trigger rod. The bottom end of the spring is fixedly connected to the top of the synchronization ring, and the top end is fixedly connected to the assembly housing to hold the height trigger rod.

[0008] Preferably, two support slides are fixedly installed inside the cabinet, and two displacement cylinders are respectively fixedly installed on the two support slides, with the bottoms of the two support slides sliding along the two support slides respectively.

[0009] Preferably, the top of the cabinet has two adjustment openings, and the two support slides slide through the two adjustment openings respectively, with the width of the adjustment openings being the same as the width of the support slides.

[0010] Preferably, a sealing plate is fixedly installed on each of the two supporting slide plates, and the two sealing plates slide along the top of the cabinet to close the adjustment port.

[0011] Preferably, a drain outlet is provided in the middle of the top of the cabinet, and a collection box is slidably installed inside the cabinet. The collection box is arranged corresponding to the drain outlet, and a handle is fixedly installed on the collection box.

[0012] Preferably, a transverse motor is fixedly installed on the top of the top plate, a small gear is fixedly installed on the output shaft of the transverse motor, and a large gear is fixedly installed at the end of the transverse screw, the large gear meshing with the small gear.

[0013] Preferably, the transmission cylinder has a rectangular through hole, through which the rectangular rod slides.

[0014] Preferably, the cabinet has multiple access doors, and both support frames have clearance openings.

[0015] Compared with related technologies, the automated grinding equipment for valve stems provided by this invention has the following advantages:

[0016] Compared with existing technologies, the automated grinding equipment for valve stems provided in this solution integrates the roundness measuring mechanism and the grinding mechanism into the same assembly housing. The roundness measuring mechanism moves synchronously with the hoisting housing along the transverse screw, achieving real-time coordination between grinding and roundness measurement. The roundness measuring mechanism moves synchronously with the grinding operation, continuously and dynamically measuring the valve stem, replacing the traditional fixed-point sampling inspection method, eliminating measurement blind spots, and achieving full-coverage real-time monitoring of the processing process. Based on real-time roundness measurement data, grinding parameters or feed rate can be adjusted immediately, avoiding repeated processing, significantly improving processing efficiency and finished product qualification rate, and ensuring that the valve stem roundness accuracy meets design requirements. Attached Figure Description

[0017] Figure 1 This is a front-view stereoscopic structural schematic diagram provided by the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure on the other side is shown;

[0019] Figure 3 This is a schematic diagram of the main sectional view structure provided by the present invention;

[0020] Figure 4 for Figure 3 An enlarged structural diagram of part A shown in the figure;

[0021] Figure 5 for Figure 3 An enlarged structural diagram of part B shown in the figure;

[0022] Figure 6 for Figure 3 An enlarged structural diagram of section C shown in the figure;

[0023] Figure 7 for Figure 6 An enlarged structural diagram of part D shown in the figure;

[0024] Figure 8 for Figure 6 An enlarged structural diagram of part E shown in the figure;

[0025] Figure 9 This is a schematic diagram of the side sectional view structure provided by the present invention;

[0026] Figure 10 for Figure 9 An enlarged structural diagram of part F shown in the figure;

[0027] Figure 11 for Figure 10 An enlarged structural diagram of part G shown in the figure;

[0028] Figure 12 A bottom-view three-dimensional structural diagram of the hoisting shell, assembly shell, grinding mechanism, and circle measuring mechanism;

[0029] Figure 13 A bottom-view three-dimensional structural diagram of the circle measuring mechanism;

[0030] Figure 14 This is a bottom view schematic diagram of the grinding mechanism;

[0031] Figure 15 This is a schematic diagram of the structure from below for the hoisting column.

[0032] Reference numerals: 1. Cabinet; 2. Displacement cylinder; 3. Support slide plate; 4. Turntable; 5. Three-jaw chuck; 6. Chuck rotary motor; 7. Support frame; 8. Top plate; 9. Transverse screw; 10. Lifting housing; 11. Lifting column; 12. Assembly housing; 13. Grinding adjustment cylinder; 14. Connecting seat; 15. Rectangular rod; 16. Connecting plate; 17. Grinding plate; 18. Transmission cylinder; 19. Power motor; 20. Bevel gear; 21. Measuring and adjusting cylinder; 22. Assembly housing; 23. Height sensor; 24. Height trigger rod; 25. Ball head; 26. Synchronous ring; 27. Spring 1; 28. Support slide; 29. ​​Adjustment... 30. Joint; 31. Sealing plate; 32. Waste discharge port; 33. Collection box; 34. Horizontal movement motor; 35. Small gear; 36. Large gear plate; 37. Stabilizer; 38. L-shaped hanger; 39. Circular seat; 40. Connecting ring; 41. U-shaped bracket; 42. Moving track; 43. Assembly seat; 44. Bidirectional screw; 45. Hinge groove; 46. Width trigger plate; 47. Width sensor; 48. Guide rope frame; 49. Elastic rope; 50. U-shaped slide; 51. Sliding guide rod; 52. Anti-collision slide plate; 53. Spring II; 54. Worm gear; 55. Direction adjustment motor; 56. Load-bearing ring sleeve; 57. Pin; 58. Ball bearing. Detailed Implementation

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] This invention provides an automated grinding device for valve stems, such as... Figure 1-15 As shown, the automated grinding equipment for valve stems includes: a cabinet 1, inside which two displacement cylinders 2 are fixedly installed; two support slide plates 3 are slidably installed on the top of the cabinet 1, and the two support slide plates 3 are respectively fixedly connected to the output rods of the two displacement cylinders 2, so that the two support slide plates 3 slide relative to each other; a turntable 4 located above the cabinet 1 is rotatably installed on each of the two support slide plates 3; a three-jaw chuck 5 is fixedly installed on the opposite side of each of the two turntables 4, and the two three-jaw chucks 5 are used to clamp and fix the valve stem; a chuck rotation motor 6 is fixedly installed on one of the support slide plates 3, and the output shaft of the chuck rotation motor 6 is fixedly connected to the corresponding turntable 4, for driving the three-jaw chuck 5 to rotate. The movement drives the valve stem to rotate; two support frames 7 are fixedly installed on the top of the cabinet 1, and the same top plate 8 is fixedly installed on the top of the two support frames 7. The same transverse screw 9 is rotatably installed on the two support frames 7. The transverse screw 9 is arranged parallel to the lower valve stem. A lifting housing 10 is threaded on the transverse screw 9. The top of the lifting housing 10 is slidably connected to the bottom of the top plate 8. A lifting column 11 is installed at the bottom of the lifting housing 10. An assembly housing 12 is fixedly installed at the bottom end of the lifting column 11. A grinding mechanism and a roundness measuring mechanism are installed on the assembly housing 12. The grinding mechanism is used to grind the lower valve stem, and the roundness measuring mechanism is used to measure the roundness of the lower valve stem.

[0035] In this embodiment, when the automated grinding equipment is working, the valve stem to be processed is first placed between two three-jaw chucks 5, and the two displacement cylinders 2 are started. The output rods of the displacement cylinders 2 push the two support slide plates 3 to slide relative to each other on the top of the cabinet 1, so that the two support slide plates 3 move closer to each other until the two three-jaw chucks 5 clamp and fix the two ends of the valve stem. After clamping is completed, the chuck rotary motor 6 is started. The output shaft of the chuck rotary motor 6 drives the corresponding turntable 4 to rotate on the support slide plate 3. The turntable 4 drives the three-jaw chucks 5 and the valve stem to rotate synchronously, providing rotary feed motion for grinding.

[0036] During the grinding operation, the transverse screw 9 rotates between the two support frames 7. Due to the sliding connection between the top of the hoisting housing 10 and the bottom of the top plate 8, which forms a guiding constraint, the rotational motion of the transverse screw 9 is converted into the linear transverse motion of the hoisting housing 10 along the valve stem axis. The hoisting housing 10 drives the assembly housing 12 to move synchronously through the hoisting column 11. The grinding mechanism on the assembly housing 12 grinds the rotating valve stem below. At the same time, the roundness measuring mechanism on the assembly housing 12 moves synchronously with the grinding mechanism and performs real-time roundness measurement of the valve stem during the grinding process, realizing the integrated collaborative operation of processing and inspection.

[0037] This automated grinding equipment uses a displacement cylinder 2 to drive the support slide plate 3 to slide relative to each other, and works with a three-jaw chuck 5 to achieve automatic clamping and positioning of the valve stem. The clamping stability is high and it can adapt to the processing requirements of valve stems of different lengths and specifications. The chuck rotary motor 6 drives the valve stem to rotate at a constant speed through the turntable 4, providing a stable rotary feed for grinding and ensuring that the grinding surface quality is uniform.

[0038] The ball screw drive structure of the transverse screw 9 and the hoisting housing 10 accurately converts the rotational motion into the linear feed motion of the grinding mechanism along the valve stem axis. The sliding guide of the top plate 8 to the hoisting housing 10 ensures the straightness accuracy of the transverse trajectory. The vertical layout of the hoisting column 11 and the assembly housing 12 allows the grinding mechanism and the roundness measuring mechanism to be suspended above the valve stem, which is compact and easy to maintain.

[0039] The core innovation lies in the integration of the roundness measuring mechanism and the grinding mechanism into the same assembly housing 12, which moves synchronously along the transverse screw 9 with the hoisting housing 10, realizing real-time coordination between grinding and roundness measurement. The roundness measuring mechanism moves synchronously with the grinding operation to continuously and dynamically measure the valve stem, replacing the traditional fixed-point sampling inspection method, eliminating measurement blind spots, and achieving full-coverage real-time monitoring of the processing process. Based on the real-time roundness measurement data, grinding parameters or feed rate can be adjusted immediately to avoid repeated processing, significantly improve processing efficiency and finished product qualification rate, and ensure that the roundness accuracy of the valve stem meets the design requirements.

[0040] In a further preferred embodiment of the present invention, the grinding mechanism includes a grinding adjustment cylinder 13 fixedly installed on the top of the assembly housing 12. The output rod of the grinding adjustment cylinder 13 is vertically downward and fixedly installed with a connecting seat 14. A rectangular rod 15 is rotatably installed at the bottom of the connecting seat 14. A connecting plate 16 is fixedly installed at the bottom end of the rectangular rod 15. A grinding disc 17 is fixedly installed at the bottom of the connecting plate 16 for grinding the valve stem during rotation. A transmission cylinder 18 is rotatably installed at the bottom of the assembly housing 12. The transmission cylinder 18 is slidably sleeved on the rectangular rod 15, and the two rotate synchronously. A power motor 19 is fixedly installed inside the assembly housing 12. A bevel gear 20 is fixedly sleeved on both the output shaft of the power motor 19 and the transmission cylinder 18, and the two bevel gears 20 mesh with each other.

[0041] In this embodiment, when the grinding mechanism is working, the grinding adjustment cylinder 13 is fixedly installed on the top of the assembly housing 12. Its vertically downward output rod pushes the connecting seat 14 to move up and down. The connecting seat 14 drives the rectangular rod 15, the connecting plate 16, and the grinding disc 17 to move up and down as a whole, realizing the radial feed adjustment between the grinding disc 17 and the valve stem surface. During grinding, the power motor 19 is fixedly installed inside the assembly housing 12 and starts to run. The bevel gear 20 on the output shaft of the power motor 19 meshes with the bevel gear 20 on the transmission cylinder 18 to transmit power to the transmission cylinder 18. 8; The transmission cylinder 18 is rotatably mounted on the bottom of the assembly housing 12 and slidably sleeved on the outer periphery of the rectangular rod 15. The transmission cylinder 18 and the rectangular rod 15 form a spline sliding fit, allowing axial relative sliding while maintaining synchronous rotation; the rotational power of the transmission cylinder 18 is transmitted to the connecting plate 16 through the rectangular rod 15, and finally drives the grinding disc 17 to rotate at high speed to perform grinding on the valve stem below; during the grinding process, the grinding adjustment cylinder 13 can adjust the extension and retraction of the output rod in real time according to the feedback of the roundness measuring mechanism, change the contact pressure between the grinding disc 17 and the valve stem, and realize dynamic compensation of the grinding depth.

[0042] This grinding mechanism uses a grinding adjustment cylinder 13 as the radial feed drive source. The output rod is vertically arranged to directly push the connecting seat 14. The force transmission path is short and the response speed is fast, enabling rapid adjustment and precise control of grinding pressure, adapting to the grinding process requirements of valve stems made of different materials. The sliding sleeve structure between the rectangular rod 15 and the transmission cylinder 18 ensures reliable transmission of rotational torque and meets the axial sliding requirements of the connecting seat 14 during lifting, resulting in a high degree of structural integration. The connecting plate 16 serves as an intermediate connecting component, facilitating the disassembly, replacement, and maintenance of the grinding disc 17.

[0043] In a further preferred embodiment of the present invention, the circularity measuring mechanism includes a measuring and adjusting cylinder 21 fixedly installed on the top of the assembly housing 12. The output rod of the measuring and adjusting cylinder 21 is vertically downward and fixedly installed on the assembly housing 22. The assembly housing 22 slides through the bottom of the assembly housing 12. A height sensor 23 is fixedly installed inside the assembly housing 22. The trigger end of the height sensor 23 is vertically downward. A height trigger rod 24 is slidably installed inside the assembly housing 22. The top end of the height trigger rod 24 contacts the trigger end of the height sensor 23. The bottom end of the height trigger rod 24 extends to the outside of the bottom of the assembly housing 22 and is fixedly installed with a ball head 25 for contacting the valve stem and triggering the height sensor 23 when it jumps. A synchronization ring 26 is fixedly sleeved on the height trigger rod 24. A spring 27 is slidably sleeved on the height trigger rod 24. The bottom end of the spring 27 is fixedly connected to the top of the synchronization ring 26, and the top end is fixedly connected to the assembly housing 22 to hold the height trigger rod 24.

[0044] In this embodiment, when the roundness measuring mechanism is working, the measuring and adjusting cylinder 21 is fixedly installed on the top of the assembly housing 12. Its vertically downward output rod pushes the assembly housing 22 to move up and down. The assembly housing 22 slides through the bottom of the assembly housing 12 and moves horizontally synchronously with the assembly housing 12, realizing the linkage feed between the roundness measuring mechanism and the grinding mechanism. Before measurement, the measuring and adjusting cylinder 21 adjusts the extension and retraction of the output rod to maintain a reasonable contact pressure between the ball head 25 and the valve stem surface. During measurement, the ball head 25 moves along the valve stem axial direction with the assembly housing 12, while the valve stem is driven to rotate by the three-jaw chuck 5. If the valve stem has a roundness error or surface... When the surface jumps, the ball head 25 moves up and down, causing the height trigger rod 24 to slide synchronously within the assembly housing 22. The top of the height trigger rod 24 remains in contact with the trigger end of the height sensor 23, converting the mechanical displacement into an electrical signal output. The synchronous ring 26 on the height trigger rod 24 moves up and down synchronously with the rod body. The top of the spring 27, which is slidably sleeved on the height trigger rod 24, is fixedly connected to the assembly housing 22, and the bottom is fixedly connected to the synchronous ring 26. The spring force ensures that the height trigger rod 24 always has a downward reset tendency, ensuring that the ball head 25 and the valve stem surface remain in continuous contact, and preventing them from losing contact during the measurement process.

[0045] This round measuring mechanism uses a measuring and adjusting cylinder 21 as the vertical feed drive, and the output rod directly pushes the assembly housing 22. It has a simple structure and a rapid adjustment response. It can quickly adjust the initial measurement position according to different diameter valve rods, and has strong adaptability. The assembly housing 22 slides through the bottom of the assembly housing 12 and shares the same transverse drive system with the grinding mechanism to ensure that the round measuring trajectory coincides with the grinding trajectory, and realize the spatial synchronization of processing and measurement.

[0046] The height sensor 23 is fixedly built into the assembly housing 22, with the trigger end arranged vertically downwards, forming a precision contact measurement chain with the height trigger rod 24. The signal conversion is direct and reliable, and the measurement resolution is high. The ball head 25 makes point contact with the valve stem, sensitively capturing micro-undulations on the surface and accurately reflecting the roundness error.

[0047] The roundness measuring mechanism is integrated with the grinding mechanism in the same assembly housing 12. Driven by the transverse screw 9, it continuously scans the entire length of the valve stem, replacing the traditional sampling inspection mode after processing, and realizing real-time online monitoring of the grinding process. The measurement data is fed back to the grinding adjustment cylinder 13 in real time, forming a closed-loop control of processing, inspection and compensation, which can promptly detect and correct roundness deviations, avoid rework after completion, significantly shorten the processing cycle and improve the consistency of valve stem finished product quality.

[0048] In a further preferred embodiment of the present invention, two support slides 28 are fixedly installed inside the cabinet 1, and two displacement cylinders 2 are respectively fixedly installed on the two support slides 28. The bottoms of the two support slides 3 slide along the two support slides 28 respectively.

[0049] In this embodiment, two support slides 28 are fixedly installed inside the cabinet 1 to provide installation reference and guiding constraints for the displacement cylinder 2 and the support slide 3; the two displacement cylinders 2 are respectively fixedly installed on the two support slides 28 to ensure the stability and reliability of the cylinder body; the bottoms of the two support slides 3 slide along the two support slides 28 respectively. When the output rod of the displacement cylinder 2 extends or retracts, the support slide 3 achieves precise linear reciprocating motion under the guidance of the support slides 28, driving the turntable 4 and the three-jaw chuck 5 to move closer or further away, completing the clamping or releasing action of the valve stem.

[0050] In a further preferred embodiment of the present invention, the top of the cabinet 1 has two adjustment openings 29, and the two supporting slide plates 3 slide through the two adjustment openings 29 respectively. The width of the adjustment opening 29 is the same as the width of the supporting slide plate 3.

[0051] In this embodiment, two adjustment ports 29 are provided on the top of the cabinet 1. Two support slide plates 3 slide through the two adjustment ports 29 respectively. The width of the adjustment port 29 is the same as the width of the support slide plate 3 to form a precise sliding fit. When the output rod of the displacement cylinder 2 drives the support slide plate 3 to move, the support slide plate 3 slides in a straight line under the constraint of the side wall of the adjustment port 29. The adjustment port 29 forms a lateral limit and a longitudinal guide for the support slide plate 3, ensuring that the support slide plate 3 drives the turntable 4 and the three-jaw chuck 5 to move precisely along a predetermined trajectory, thus completing the clamping and positioning of the valve stem.

[0052] In a further preferred embodiment of the present invention, sealing plates 30 are fixedly installed on both of the two supporting slide plates 3, and both sealing plates 30 slide along the top of the cabinet 1 to close the adjustment port 29.

[0053] In this embodiment, two sealing plates 30 are fixedly installed on two support slide plates 3 and move synchronously with the support slide plates 3. When the displacement cylinder 2 drives the support slide plate 3 to slide along the adjustment port 29, the sealing plates 30 slide synchronously along the top of the cabinet 1, always covering the adjustment port 29. When the two sealing plates 30 are relatively close, they connect and seal the adjustment port 29. When they are relatively far apart, they each follow the corresponding support slide plate 3 to continuously cover the exposed area of ​​the adjustment port 29, thereby achieving full-stroke dynamic sealing of the adjustment port 29.

[0054] In a further preferred embodiment of the present invention, a drain outlet 31 is provided in the middle of the top of the cabinet 1, and a collection box 32 is slidably installed inside the cabinet 1. The collection box 32 is correspondingly arranged with the drain outlet 31, and a handle is fixedly installed on the collection box 32.

[0055] In this embodiment, the waste discharge port 31 at the top center of the cabinet 1 is located directly below the grinding operation area. The chips generated during the grinding process fall into the collection box 32 inside the cabinet 1 through the waste discharge port 31. The collection box 32 is slidably installed inside the cabinet 1 and is correspondingly set with the waste discharge port 31 to collect grinding waste. When the collection box 32 is full, the operator holds the handle and slides the collection box 32 out along the cabinet 1 to empty the waste and then pushes it back in to continue the collection operation.

[0056] In a further preferred embodiment of the present invention, a transverse motor 33 is fixedly installed on the top of the top plate 8, a pinion 34 is fixedly installed on the output shaft of the transverse motor 33, and a large gear 35 is fixedly installed at the end of the transverse screw 9, the large gear 35 meshing with the pinion 34.

[0057] In this embodiment, the transverse motor 33 is fixedly installed on the top of the top plate 8. The output shaft of the transverse motor 33 drives the pinion 34 to rotate. The pinion 34 meshes with the large gear disk 35 fixedly installed at the end of the transverse screw 9, which converts the high-speed, low-torque output of the transverse motor 33 into the low-speed, high-torque rotational motion of the transverse screw 9. The transverse screw 9 rotates between the two support frames 7, driving the hoisting housing 10 to slide along the bottom of the top plate 8, driving the grinding mechanism and the roundness measuring mechanism to move transversely synchronously, thereby realizing the axial feed machining and measurement of the valve stem.

[0058] In a further preferred embodiment of the present invention, the transmission cylinder 18 has a rectangular through hole, and the rectangular rod 15 slides through the rectangular through hole.

[0059] In this embodiment, the transmission cylinder 18 has a rectangular through hole, through which the rectangular rod 15 slides, forming a spline-type fit. The power motor 19 drives the transmission cylinder 18 to rotate through the meshing of the bevel gear 20. The sidewall of the rectangular through hole of the transmission cylinder 18 fits against the four sides of the rectangular rod 15, transmitting torque to the rectangular rod 15 and driving the connecting plate 16 and the grinding plate 17 to rotate synchronously. At the same time, the rectangular rod 15 can slide axially along the rectangular through hole of the transmission cylinder 18. When the grinding adjustment cylinder 13 drives the connecting seat 14 to rise and fall, the rectangular rod 15 moves up and down relative to the transmission cylinder 18 while maintaining rotation, thereby realizing the radial feed adjustment of the grinding plate 17.

[0060] In a further preferred embodiment of the present invention, the cabinet 1 has multiple inspection doors, and both support frames 7 have clearance openings.

[0061] In this embodiment, the multiple inspection doors on the cabinet 1 provide maintenance access for operators, facilitating daily inspection, maintenance, and troubleshooting of components such as the displacement cylinder 2, support slide 28, and collection box 32 inside the cabinet 1; the clearance openings on both support frames 7 provide space for the assembly and movement of the transverse screw 9 and the hoisting housing 10.

[0062] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments:

[0063] In another embodiment of the present invention, a stabilizing frame 36 is fixedly installed on the side of the assembly housing 12, an L-shaped hanger 37 is slidably installed on the stabilizing frame 36, and a circular seat 38 is fixedly installed on the L-shaped hanger 37. The circular seat 38 is rotatably sleeved on the outside of the connecting plate 16, and a connecting ring 39 is fixedly sleeved on the outside of the connecting plate 16. The connecting ring 39 is rotatably embedded in the circular seat 38 to stabilize the rotation of the grinding disc 17.

[0064] In this embodiment, the stabilizer 36 is fixedly installed on the side of the assembly housing 12 to provide vertical guide support for the L-shaped hanger 37; the annular seat 38 fixedly installed on the L-shaped hanger 37 rises and falls synchronously with the L-shaped hanger 37, the annular seat 38 is rotatably sleeved on the outer periphery of the connecting plate 16, and the connecting ring 39 fixedly sleeved on the outer side of the connecting plate 16 is rotatably embedded in the annular seat 38; when the grinding adjustment cylinder 13 drives the connecting seat 14 and the rectangular rod 15 to rise and fall, the connecting plate 16 drives the connecting ring 39 to slide synchronously with the annular seat 38. At the same time, when the grinding plate 17 rotates and grinds, the connecting ring 39 rotates relative to the annular seat 38. The annular seat 38 provides radial constraint to the connecting plate 16 through the connecting ring 39, stabilizing the rotation axis of the grinding plate 17.

[0065] In another embodiment of the present invention, a U-shaped bracket 40 is fixedly sleeved on the bottom of the assembly housing 22. The U-shaped bracket 40 is arranged intersecting with the valve stem. A movable track 41 is fixedly installed inside the U-shaped bracket 40. The movable track 41 is located below the assembly housing 22 and on the side of the height trigger rod 24. The movable track 41 is arranged intersecting with the height trigger rod 24. Two mounting seats 42 are mounted on the movable track 41. The two mounting seats 42 slide relative to each other along the two sides of the height trigger rod 24. A bidirectional screw 43 is rotatably installed on the U-shaped bracket 40. The bidirectional screw 43 is threaded through the two mounting seats 42 and is used to drive them to slide, thereby adapting to the valve stem diameter. Tightening blocks are fixedly installed at both ends of the bidirectional screw 43. A hinge groove 44 is opened at the bottom end of each of the two mounting seats 42. A width trigger plate 45 is hingedly installed in each of the two hinge grooves 44. The two are used to contact the valve stem to measure its roundness. A width trigger plate 45 is fixedly installed on each of the two mounting seats 42. The two width sensors 46 have their sensing ends aligned with the height trigger rod 24 and are fixedly mounted with guide rope frames 47. Elastic ropes 48 are slidably mounted within each of the two guide rope frames 47. The two ends of each elastic rope 48 are fixedly connected to the corresponding mounting base 42 and the width trigger plate 45, respectively, so that when the width trigger plate 45 deflects, the elastic rope 48 tightens, triggering the width sensor 46. A U-shaped slide 49 is fixedly mounted on the side of each mounting base 42 away from the height trigger rod 24. Sliding guide rods 50 are slidably mounted on the U-shaped carriage 49. Abutting slide plates 51 are fixedly mounted at the ends of the two sliding guide rods 50. The two abutting slide plates 51 abut against the two width trigger plates 45 respectively, so that when the width trigger plates 45 deflect, they push the abutting slide plates 51 and the sliding guide rods 50 to slide. Springs 52 are slidably sleeved on the two sliding guide rods 50. The two ends of the springs 52 abut against the abutting slide plates 51 and the U-shaped carriage 49 respectively, and are used to reset the width trigger plates 45.

[0066] In this embodiment, when the width measuring mechanism is working, the U-shaped bracket 40 is fixedly sleeved on the outer periphery of the bottom of the assembly housing 22, forming a cross arrangement with the valve stem; the movable track 41 fixedly installed inside the U-shaped bracket 40 is located below the assembly housing 22 and on the side of the height trigger rod 24, and is arranged crosswise with the height trigger rod 24; before measurement, the operator rotates the screw blocks at both ends of the bidirectional screw 43, the bidirectional screw 43 threaded through the two assembly seats 42, driving the two assembly seats 42 to slide relative to each other along the movable track 41, adjusting the spacing according to the valve stem diameter, so that the two width trigger plates 45 respectively fit against the two sides of the valve stem surface; during measurement, the ball head 25 drives the height trigger rod 24 to rise and fall with the change of valve stem roundness, and at the same time the two A width trigger plate 45 moves laterally with the assembly housing 12 and comes into contact with the rotating valve stem. When there is a change in the diameter or a roundness error in the valve stem, the width trigger plate 45 deflects around the hinge groove 44. When the width trigger plate 45 deflects, the elastic rope 48 is tightened. The elastic rope 48 slides along the guide rope frame 47 and triggers the sensing end of the width sensor 46, converting the deflection displacement into an electrical signal. At the same time, the deflection of the width trigger plate 45 pushes the abutment slide plate 51. The abutment slide plate 51 drives the sliding guide rod 50 to slide along the U-shaped slide 49. The second spring 52 is compressed and stores energy between the abutment slide plate 51 and the U-shaped slide 49, providing a reset force for the width trigger plate 45, ensuring that it continues to be in contact with the valve stem surface, and realizing real-time dynamic measurement in the width direction.

[0067] This width measuring mechanism adopts an integrated layout of a U-shaped bracket 40 and a moving track 41. A bidirectional screw 43 drives two mounting seats 42 to slide relative to each other, quickly adapting to valve stems of different diameters and offering strong versatility. The width trigger plate 45 is hinged to the bottom of the mounting seat 42, making point contact with both sides of the valve stem, sensitively capturing diameter changes and ellipticity errors. This complements the axial measurement of the height trigger rod 24, achieving comprehensive detection of the valve stem's three-dimensional shape. The flexible transmission of the elastic rope 48 and the guide rope frame 47 reliably transmits the deflection displacement of the width trigger plate 45 to the width sensor 46, providing a signal. The conversion is direct, the measurement chain is short, and the accuracy is high. The elastic reset mechanism of the sliding guide rod 50 and the second spring 52 provides a constant preload to the width trigger plate 45 through the contact plate 51, automatically adapting to the micro-undulations of the valve stem surface, preventing loss of contact or excessive pressing during the measurement process, and protecting the sensor from impact damage. This mechanism works in conjunction with the height sensor 23 to synchronously acquire valve stem height and width data, comprehensively evaluate roundness, cylindricity, and diameter consistency, provide multi-dimensional compensation basis for grinding adjustment cylinder 13, and significantly improve the geometric accuracy and surface quality of the valve stem.

[0068] In another embodiment of the present invention, the lifting column 11 is rotatably mounted on the lifting housing 10. A worm gear 53 is fixedly sleeved on the top end of the lifting column 11. A worm 54 is rotatably mounted on the lifting housing 10. The worm 54 meshes with the worm gear 53 and is used to drive the lifting column 11 and the assembly housing 12 to rotate, so that the grinding mechanism and the measuring circle mechanism can switch according to the direction of travel. A direction adjustment motor 55 is fixedly mounted on the lifting housing 10. The output shaft of the direction adjustment motor 55 is fixedly connected to one end of the worm 54. A load-bearing ring 56 is sleeved on the lifting column 11. The two are fixed by a pin 57. A ball bearing 58 is movably embedded on the bottom inner wall of the lifting housing 10. The ball bearing 58 contacts the bottom of the load-bearing ring 56.

[0069] In this embodiment, when the direction switching mechanism is working, the lifting column 11 is rotatably mounted on the lifting housing 10, and the direction adjustment motor 55 is fixedly mounted on the lifting housing 10. Its output shaft drives the worm gear 54 to rotate. The worm gear 54 meshes with the worm wheel 53 fixedly sleeved at the top of the lifting column 11, converting the rotational motion into the rotational motion of the lifting column 11. This drives the lifting column 11 and the assembly housing 12 fixedly mounted at the bottom to rotate as a whole, so that the grinding mechanism and the roundness measuring mechanism can switch positions according to the lateral movement direction. The load-bearing ring 56 sleeved on the lifting column 11 is fixedly connected to the lifting column 11 by a pin 57. The ball bearings 58 movably embedded in the inner wall of the bottom of the lifting housing 10 contact the bottom of the load-bearing ring 56 to form a rolling support structure, which bears the gravity load of the assembly housing 12 and the grinding roundness measuring mechanism.

[0070] In summary, compared with related technologies, the roundness measuring mechanism and the grinding mechanism of this device are integrated and installed in the same assembly housing 12, and move synchronously along the transverse screw 9 with the hoisting housing 10, realizing real-time coordination between grinding and roundness measurement; the roundness measuring mechanism moves synchronously with the grinding operation to continuously and dynamically measure the valve stem, replacing the traditional needle-based fixed-point sampling method, eliminating measurement blind spots, and realizing full-coverage real-time monitoring of the processing process; based on the real-time roundness measurement data, grinding parameters or feed rate can be adjusted immediately, avoiding repeated processing, significantly improving processing efficiency and finished product qualification rate, and ensuring that the roundness accuracy of the valve stem meets the design requirements.

[0071] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. An automated grinding machine for valve stems, characterized in that, include: The cabinet has two displacement cylinders fixedly installed inside and two support slide plates slidably installed on the top of the cabinet. The two support slide plates are respectively fixedly connected to the output rods of the two displacement cylinders so that the two support slide plates slide relative to each other. Both of the aforementioned support slides are rotatably mounted with a turntable located above the cabinet. A three-jaw chuck is fixedly mounted on one side of each of the two turntables. The two three-jaw chucks are used to clamp and fix the valve stem. A chuck rotation motor is fixedly mounted on one of the support slides. The output shaft of the chuck rotation motor is fixedly connected to the corresponding turntable and is used to drive the three-jaw chuck to rotate, thereby driving the valve stem to rotate. Two support frames are fixedly installed on the top of the cabinet. The top of the two support frames is fixedly installed with the same top plate. The same transverse sliding screw is rotatably installed on the two support frames. The transverse sliding screw is arranged parallel to the lower valve stem. A lifting housing is threaded onto the transverse sliding screw. The top of the lifting housing is slidably connected to the bottom of the top plate. A lifting column is installed at the bottom of the lifting housing. An assembly housing is fixedly installed at the bottom end of the lifting column. A grinding mechanism and a roundness measuring mechanism are installed on the assembly housing. The grinding mechanism is used to grind the lower valve stem, and the roundness measuring mechanism is used to measure the roundness of the lower valve stem. The circularity measuring mechanism includes a measuring and adjusting cylinder fixedly installed on the top of the assembly housing. The output rod of the measuring and adjusting cylinder is vertically downward and fixedly installed on the assembly housing. The assembly housing slides through the bottom of the assembly housing. A height sensor is fixedly installed inside the assembly housing. The trigger end of the height sensor is vertically downward. A height trigger rod is slidably installed inside the assembly housing. The top end of the height trigger rod contacts the trigger end of the height sensor. The bottom end of the height trigger rod extends to the outside of the bottom of the assembly housing and is fixedly installed with a ball head for contacting the valve stem. When the valve jumps, it triggers the height sensor. A synchronization ring is fixedly sleeved on the height trigger rod. A spring is slidably sleeved on the height trigger rod. The bottom end of the spring is fixedly connected to the top of the synchronization ring, and the top end is fixedly connected to the assembly housing to hold the height trigger rod. Two support slides are fixedly installed inside the cabinet, and two displacement cylinders are respectively fixedly installed on the two support slides. The bottoms of the two support slides slide along the two support slides respectively.

2. The automated grinding equipment for valve stems as described in claim 1, characterized in that, The grinding mechanism includes a grinding adjustment cylinder fixedly installed on the top of the assembly housing. The output rod of the grinding adjustment cylinder is vertically downward and fixedly mounted with a connecting seat. A rectangular rod is rotatably mounted on the bottom of the connecting seat. A connecting plate is fixedly mounted on the bottom end of the rectangular rod. A grinding disc is fixedly mounted on the bottom of the connecting plate for grinding the valve stem during rotation. A transmission cylinder is rotatably mounted on the bottom of the assembly housing. The transmission cylinder is slidably sleeved on the rectangular rod, and the two rotate synchronously. A power motor is fixedly installed inside the assembly housing. Both the output shaft of the power motor and the transmission cylinder are fixedly sleeved with bevel gears, and the two bevel gears mesh with each other.

3. The automated grinding equipment for valve stems as described in claim 1, characterized in that, The top of the cabinet has two adjustment openings, and the two support slides slide through the two adjustment openings respectively. The width of the adjustment openings is the same as the width of the support slides.

4. The automated grinding equipment for valve stems as described in claim 3, characterized in that, Both of the support slide plates are fixedly installed with sealing plates, and both sealing plates slide along the top of the cabinet to close the adjustment port.

5. The automated grinding equipment for valve stems as described in claim 1, characterized in that, The top center of the cabinet has a drain opening, and a collection box is slidably installed inside the cabinet. The collection box is positioned corresponding to the drain opening, and a handle is fixedly installed on the collection box.

6. The automated grinding equipment for valve stems as described in claim 1, characterized in that, A transverse motor is fixedly installed on the top of the top plate. A small gear is fixedly installed on the output shaft of the transverse motor. A large gear is fixedly installed at the end of the transverse screw. The large gear meshes with the small gear.

7. The automated grinding equipment for valve stems as described in claim 2, characterized in that, The transmission cylinder has a rectangular through hole, through which the rectangular rod slides.

8. The automated grinding equipment for valve stems as described in claim 1, characterized in that, The cabinet has multiple access doors, and both support frames have clearance openings.

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