Valve rod end face grinding device

Abstract

The utility model discloses a valve rod end face polishing device, which relates to the technical field of valve rod processing, and comprises an incoming conveyor belt and an outgoing conveyor belt, an overturning assembly is arranged between the incoming conveyor belt and the outgoing conveyor belt, and a clamping assembly is arranged on one side of the overturning assembly. A fixing assembly is arranged on the side, away from the clamping assembly, of the overturning assembly, a grinding assembly is arranged on the side, away from the overturning assembly, of the fixing assembly, the fixing assembly comprises a first workbench, a slidable sliding table is arranged on the first workbench, a fixing base is fixedly connected to the sliding table, a first round opening is formed in the fixing base, and a second round opening is formed in the second workbench. A first circular ring is rotationally connected into the first circular opening, a plurality of second hydraulic telescopic cylinders are arranged on the inner ring wall of the first circular ring, the fixed ends of the second hydraulic telescopic cylinders are fixedly connected to the inner wall of the first circular ring, and the output ends of the second hydraulic telescopic cylinders are fixedly connected with first clamping blocks. The valve rod polishing device has the advantage that the valve rod polishing quality and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of valve stem processing technology, specifically a valve stem end face grinding device. Background Technology

[0002] Valve is a component of the combustion chamber and, together with the cylinder block, forms the passage for gas to enter and exit the combustion chamber. Therefore, the main function of the valve is to input fuel into the engine and expel exhaust gases. A valve consists of a disc-shaped valve head and a rod-shaped valve stem, which are coaxially arranged with the valve head.

[0003] In actual production, valves have very high requirements. In order to better realize the function of the valve, the valve stem needs to be polished.

[0004] CN222520762U discloses a valve stem end grinding machine, including a base. A clamping assembly is disposed on the top of the base. The clamping assembly includes a bearing seat, which is fixedly connected to the top of the base. Two support plates are fixedly connected to the front and rear sides of the bearing seat, respectively. The two support plates are elastically connected to a clamping plate on their facing sides by a spring. The clamping plate is slidably connected to the top of the bearing seat. A pressure assembly is disposed on the left side of the bearing seat. The pressure assembly includes a screw, which is rotatably connected to the left side of the bearing seat. A sliding seat is threaded on the outer surface of the screw. Two pressure bars are fixedly connected to the right side of the sliding seat.

[0005] This device uses a pressure component to slide to the right, causing the clamping component to clamp the engine valve stem. It can clamp the engine valve stem in a centered position, but the clamping is unstable, the processing efficiency is low, and it cannot achieve stable clamping of valve stems of different diameters. At the same time, it cannot perform grinding work on the valve stem end face at different angles. Therefore, it is necessary to design a valve stem end face grinding device that can improve the grinding quality and efficiency of valve stems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a valve stem end face grinding device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a valve stem end face grinding device, comprising an input conveyor belt and an output conveyor belt, a flipping assembly being disposed between the input and output conveyor belts, a clamping assembly being disposed on one side of the flipping assembly, a fixing assembly being disposed on the side of the flipping assembly away from the clamping assembly, and a grinding assembly being disposed on the side of the fixing assembly away from the flipping assembly. The fixing assembly includes a worktable, on which a slidable slide is disposed, and a fixing seat is fixedly connected to the slide. A circular opening is provided on the fixing seat. The circular opening 1 is rotatably connected to a circular ring 1. The inner ring wall of the circular ring 1 is provided with a plurality of hydraulic telescopic cylinders 2. The fixed end of the hydraulic telescopic cylinder 2 is fixedly connected to the inner wall of the circular ring 1. The output end of the hydraulic telescopic cylinder 2 is fixedly connected to a clamping block 1. The slide table is provided with a movable moving seat. The moving seat has a circular opening 2. The circular opening 2 is rotatably connected to a circular ring 2. The inner ring wall of the circular ring 2 is provided with a plurality of hydraulic telescopic cylinders 3. The fixed end of the hydraulic telescopic cylinder 3 is fixedly connected to the inner wall of the circular ring 2. The output end of the hydraulic telescopic cylinder 3 is fixedly connected to a clamping block 2.

[0008] The present invention further describes that the clamping assembly includes a base, on which a linear motor is mounted. An electric telescopic rod is fixedly connected to the output end of the linear motor, an electric telescopic rod is fixedly connected to the output end of the electric telescopic rod, and an electric gripper is fixedly connected to the output end of the electric telescopic rod.

[0009] This utility model further describes that the flipping assembly includes a base, a second linear motor is provided on the upper side of the base, a flipping mechanism is provided on the output end of the second linear motor, the flipping mechanism includes a frame, a support plate is provided on the upper side of the frame, the support plate is rotatably connected to the frame on the side near the fixing assembly, two first hydraulic telescopic cylinders are provided on the side of the support plate near the base, the fixed ends of the two first hydraulic telescopic cylinders are rotatably connected to the frame, the output ends of the first hydraulic telescopic cylinders are hinged to the support plate, and a magnetic chuck is embedded on the side of the support plate away from the base.

[0010] The present invention further explains that the grinding assembly includes a second worktable, an arc-shaped motor is provided on the second worktable, a fourth drive motor is provided on the output end of the arc-shaped motor, and a grinding head is fixedly connected to the output end of the fourth drive motor.

[0011] The present invention further describes that a bracket is fixedly connected to the output end of the arc-shaped motor, and a dust collection hood is fixedly connected to the side of the bracket away from the output end of the arc-shaped motor. The dust collection hood is fitted onto the output end of the drive motor four but does not directly contact it. An air pump is connected to the output end pipe of the dust collection hood, and a separator and a filter are fixedly connected to the pipe connecting the air pump to the dust collection hood.

[0012] This utility model further explains that two sliding grooves are provided on the side of the slide table near the worktable, and guide rails are fixedly connected to the worktable corresponding to the sliding grooves. The sliding grooves cooperate with the guide rails. A hydraulic telescopic cylinder is provided on the side of the slide table near the grinding component along its length direction. The fixed end of the hydraulic telescopic cylinder is fixedly connected to the worktable, and the output end of the hydraulic telescopic cylinder is fixedly connected to the slide table.

[0013] The present invention further describes that a gear ring is fixedly connected to one side of the outer ring wall of the first ring along its axial direction, a drive motor is fixedly connected to the fixed base, and a gear is fixedly connected to the output end of the drive motor, the gear meshing with the gear on the gear ring.

[0014] This utility model further describes that the movable seat has round holes on both sides of its lower part along its length direction. A guide rod is provided on the side of the slide away from the worktable corresponding to the round hole. A fixing block one is fixedly connected to the side of the guide rod near the grinding component along its length direction. The side of the guide rod away from the fixing block one is fixedly connected to the fixed seat. The round hole cooperates with the guide rod. The movable seat has a threaded hole. A lead screw is provided on the side of the slide away from the worktable corresponding to the threaded hole. The lead screw is screwed to the threaded hole. A fixing block two is provided on the side of the lead screw near the grinding component along its length direction. The lead screw and the fixing block two are rotatably connected. A drive motor two is fixedly connected on the side of the lead screw away from the fixing block two along its axial direction. The drive motor two is embedded in the fixed seat.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model uses a fixing component to stably clamp valve stems of different models and uses an adjustable angle grinding head to grind the valve stems, thereby improving the grinding effect on the valve stem end face.

[0016] By setting up an input conveyor belt, a clamping assembly, a flipping assembly, and an output conveyor belt, the valve stem can be continuously conveyed and processed, thereby improving the processing efficiency of the valve stem. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the clamping component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the flip-up component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the flipping mechanism structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the fixing component structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the grinding component structure of this utility model;

[0024] In the diagram: 1. Input conveyor belt; 2. Output conveyor belt; 3. Tilting assembly; 4. Clamping assembly; 5. Fixing assembly; 6. Grinding assembly; 7. Base; 8. Linear motor one; 9. Electric telescopic rod one; 10. Electric telescopic rod two; 11. Electric gripper; 12. Base; 13. Linear motor two; 14. Tilting mechanism; 15. Support plate; 16. Magnetic chuck; 17. Worktable one; 18. Slide table; 19. Guide rail; 20. Hydraulic telescopic cylinder one; 21. Fixed base; 22. Circular opening one; 23. Circular ring one; 24. Gear ring one; 25. Drive motor one; 26. Gear one ; 27. Hydraulic telescopic cylinder II; 28. Clamping block I; 29. ​​Moving seat; 30. Round hole; 31. Guide rod; 32. Fixing block I; 33. Drive motor II; 34. Round opening II; 35. Circular ring II; 36. Gear ring II; 37. Drive motor III; 38. Gear II; 39. Hydraulic telescopic cylinder III; 40. Clamping block II; 41. Workbench II; 42. Arc motor; 43. Lead screw; 44. Fixing block II; 45. Drive motor IV; 46. Grinding head; 47. Bracket; 48. Dust hood; 49. Slide groove; 141. Frame; 142. Support plate; 143. First hydraulic telescopic cylinder. Detailed Implementation

[0025] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-6The present invention provides a technical solution: a valve stem end face grinding device, including an input conveyor belt 1 and an output conveyor belt 2. A flipping component 3 is provided between the input conveyor belt 1 and the output conveyor belt 2. A clamping component 4 is provided on one side of the flipping component 3. A fixing component 5 is provided on the side of the flipping component 3 away from the clamping component 4. A grinding component 6 is provided on the side of the fixing component 5 away from the flipping component 3. The input conveyor belt 1 and the output conveyor belt 2 are both existing conventional technologies.

[0027] like Figure 2 The clamping assembly 4 includes a base 7, on which a linear motor 8 is mounted. The linear motor 8 is horizontally positioned, and its fixed end is fixedly connected to the base 7. An electric telescopic rod 9 is fixedly connected to the output end of the linear motor 8. The electric telescopic rod 9 is vertically positioned, and its fixed end is fixedly connected to the output end of the linear motor 8. An electric telescopic rod 10 is fixedly connected to the output end of the electric telescopic rod 9. The electric telescopic rod 10 is horizontally positioned, and its output end faces the side of the infeed conveyor belt 1. An electric gripper 11 is fixedly connected to the output end of the electric telescopic rod 10. The electric gripper 11 is used to clamp the valve stem on the infeed conveyor belt 1 and place it on the flipping assembly 3.

[0028] like Figure 3 The flipping component 3 includes a base 12, a linear motor 13 is provided on the upper side of the base 12, and a flipping mechanism 14 is provided on the output end of the linear motor 13.

[0029] like Figure 4 The flipping mechanism includes a frame 141, which is fixedly connected to a base 12. A support plate 142 is provided on the upper side of the frame 141. The support plate 142 is horizontally positioned. The side of the support plate 142 near the fixed component 5 is rotatably connected to the frame 141. Two first hydraulic telescopic cylinders 143 are provided on the side of the support plate 142 near the base 12. The two first hydraulic telescopic cylinders 143 are respectively provided on both sides of the support plate 142 along the length direction. The fixed ends of the two first hydraulic telescopic cylinders 143 are rotatably connected to the frame 141. The output ends of the first hydraulic telescopic cylinders 143 are hinged to the support plate 142.

[0030] A magnetic chuck 16 is embedded on the side of the support plate 142 away from the base 12. The magnetic chuck 16 generates magnetic force to magnetically fix the valve stem after being energized.

[0031] In the initial state, the support plate 142 is set horizontally. When the clamping assembly 4 places the valve stem on the support plate 142, the valve stem is magnetically fixed by the magnetic suction cup 16. Then, by activating the first hydraulic telescopic cylinder 143 of the flipping mechanism 14, the output end extends, causing the support plate 142 to flip 90° towards the fixing assembly 5. Finally, by controlling the output end of the linear motor 13 to move closer to the fixing assembly 5, it is easier for the fixing assembly 5 to fix the valve stem.

[0032] like Figure 5 The fixed component 5 includes a worktable 17, on which a slide 18 is slidably connected. Two slide grooves 49 are provided on the side of the slide 18 near the worktable 17. The two slide grooves 49 are located on both sides of the slide 18 along the width direction. A guide rail 19 is fixedly connected to the worktable 17 corresponding to the slide grooves 49. The slide grooves 49 cooperate with the guide rails 19, so that the slide 18 slides along the guide rails 19.

[0033] A hydraulic telescopic cylinder 20 is provided on the side of the slide table 18 near the grinding assembly 6 along its length. The fixed end of the hydraulic telescopic cylinder 20 is fixedly connected to the worktable 17, and the output end of the hydraulic telescopic cylinder 20 is fixedly connected to the slide table 18. The slide table 18 is driven to slide by the hydraulic telescopic cylinder 20.

[0034] A fixed base 21 is fixedly connected to the side of the slide table 18 along the length direction near the flipping component 3. A circular opening 22 is opened on the upper side of the fixed base 21. A circular ring 23 is rotatably connected inside the circular opening 22. A gear ring 24 is fixedly connected to one side of the outer ring wall of the circular ring 23 along its axial direction. A drive motor 25 is fixedly connected to the fixed base 21. A gear 26 is fixedly connected to the output end of the drive motor 25. The gear 26 meshes with the gear on the gear ring 24, and drives the circular ring 23 to rotate through the drive motor 25.

[0035] The inner ring wall of the circular ring 23 is provided with several hydraulic telescopic cylinders 27. The hydraulic telescopic cylinders 27 are evenly distributed in a circle with the axis of the circular ring 23 as the center. The fixed end of the hydraulic telescopic cylinder 27 is fixedly connected to the inner wall of the circular ring 23, and the output end of the hydraulic telescopic cylinder 27 is fixedly connected to the clamping block 28.

[0036] A movable seat 29 is provided on the side of the slide table 18 near the grinding component 6 along its length direction. Circular holes 30 are provided on the lower part of both sides of the movable seat 29 along its length direction. A guide rod 31 is provided on the side of the slide table 18 away from the worktable corresponding to the circular holes 30. The circular holes 30 and the guide rod 31 cooperate with each other. A fixing block 32 is provided on the side of the guide rod 31 near the grinding component 6 along its length direction. The guide rod 31 is fixedly connected to the fixing block 32. The side of the guide rod 31 away from the fixing block 32 is fixedly connected to the fixed seat 21.

[0037] The movable seat 29 has a threaded hole 15 located in the middle between two round holes 30. A lead screw 43 is provided on the side of the slide table 18 away from the worktable, corresponding to the threaded hole 15. The lead screw 43 is screwed to the threaded hole 15. A fixing block 44 is provided on the side of the lead screw 43 near the grinding component 6 along its length. The lead screw 43 is rotatably connected to the fixing block 44. A drive motor 33 is fixedly connected on the side of the lead screw 43 away from the fixing block 44 along its axis. The drive motor 33 is embedded in the fixed seat 21. The drive motor 33 drives the lead screw 43 to rotate, thereby further moving the movable seat 29 along the guide rod 31.

[0038] The movable base 29 has a second circular opening 34. The first circular opening 22, the second circular opening 34 and the support plate 142 are concentrically arranged. A second circular ring 35 is rotatably connected inside the second circular opening 34. A second gear ring 36 is fixedly connected to one side of the outer ring wall of the second circular ring 35 along its axial direction. A third drive motor 37 is fixedly connected to the fixed base 21. A second gear 38 is fixedly connected to the output end of the third drive motor 37. The second gear 38 meshes with the gear on the second gear ring 36, and drives the second circular ring 35 to rotate through the third drive motor 37.

[0039] The inner ring wall of the second ring 35 is provided with several hydraulic telescopic cylinders 39. The several hydraulic telescopic cylinders 39 are evenly distributed in a circle with the axis of the second ring 35 as the center. The fixed end of the hydraulic telescopic cylinder 39 is fixedly connected to the inner wall of the second ring 35. The output end of the hydraulic telescopic cylinder 39 is fixedly connected to the clamping block 40. Both the clamping block 28 and the clamping block 40 are V-shaped clamping blocks.

[0040] The output end of the hydraulic telescopic cylinder 27 on the control fixed seat 21 extends, so that the clamping block 28 clamps the side of the valve stem away from the end face. Then, according to the length of the valve stem, the moving seat 29 is moved by the drive motor 33. The output end of the hydraulic telescopic cylinder 39 on the moving seat 29 extends, so that the clamping block 40 clamps and fixes the side of the valve stem close to the end face, thereby achieving stable clamping during valve stem grinding.

[0041] like Figure 6 The grinding assembly 6 includes a second worktable 41, on which an arc motor 42 is mounted. The fixed end of the arc motor 42 is fixedly connected to the worktable 41. A fourth drive motor 45 is mounted on the output end of the arc motor 42. The fixed end of the fourth drive motor 45 is fixedly connected to the output end of the arc motor 42. The output end of the fourth drive motor 45 faces the fixed assembly 5. A grinding head 46 is fixedly connected to the output end of the fourth drive motor 45. The grinding angle of the grinding head 46 on the valve stem end face is controlled by the arc motor 42.

[0042] A bracket 47 is fixedly connected to the output end of the arc motor 42. A dust collection hood 48 is fixedly connected to the side of the bracket 47 away from the output end of the arc motor 42. The dust collection hood 48 is fitted onto the output end of the drive motor 45 but does not directly contact it. The dust collection hood 48 is a conventional technology. An air pump is connected to the output end pipe of the dust collection hood 48. A separator and a filter are fixedly connected to the pipe connecting the air pump to the dust collection hood 48. The air pump sucks in the debris that the grinding head 46 grinds off the valve stem through the inlet of the dust collection hood 48. The debris and gas are separated and filtered through the separator and filter.

[0043] In this embodiment, the feeder conveyor 1 transports the polished valve stem to the side near the flipping assembly 3, and the clamping assembly 4 places the valve stem on the feeder conveyor 1 onto the flipping assembly 3.

[0044] Specifically, by controlling the output end of the electric telescopic rod 10 to extend, the electric gripper 11 approaches the valve stem and clamps it. After clamping, the output end of the electric telescopic rod 9 is extended, the electric gripper 11 drives the valve stem to rise, and then the output end of the linear motor 8 is moved toward the support plate 142 of the flipping assembly 3.

[0045] The electric gripper 11 holds the valve stem above the support plate 142. When the output end of the electric telescopic rod 9 is retracted, the valve stem descends and contacts the support plate 142. The electric gripper 11 is then controlled to release the valve stem.

[0046] Then, the magnetic chuck 16 on the flipping assembly 3 is activated, so that the valve stem is fixed on the support plate 142. Then, the flipping mechanism 14 is controlled to run, and the support plate 142 is flipped 90° to the side closer to the fixing assembly 5.

[0047] The output end of the linear motor 13 is moved closer to the fixed component 5, so that the end face of the valve stem passes through the first ring 23 and the second ring 35 in sequence.

[0048] The output end of the hydraulic telescopic cylinder 27 on the control fixed seat 21 extends, so that the clamping block 28 clamps and fixes the root of the valve stem on the side away from the end face. Then, according to the length of the valve stem, the moving seat 29 is moved by the drive motor 33, and the clamping block 40 clamps and fixes the side of the valve stem close to the end face, thereby achieving stable clamping when grinding the valve stem.

[0049] After clamping is completed, the magnetic chuck 16 stops fixing the valve stem, and at the same time, drive motor 25 and drive motor 37 are started, which drive ring 23 and ring 35 to rotate respectively, thereby further rotating the clamped valve stem.

[0050] Start the drive motor 45 to drive the grinding head 46 to rotate. As needed to grind the valve stem end face to the required thickness, control the output end of the hydraulic telescopic cylinder 20 to extend, so that the slide table 18 drives the valve stem to move towards the side closer to the grinding head 46.

[0051] Depending on the required grinding angle of the valve stem end face, the output end of the arc motor 42 is controlled to slide, so that the output end of the arc motor 42 drives the drive motor 45 and the grinding head 46 to rotate at a certain angle and then stops moving. Then, the drive motor 45 is started to drive the grinding head 46 to rotate and grind the end face of the valve stem.

[0052] During the grinding process, the air pump is started, and the debris produced by the grinding head 46 against the valve stem is sucked in through the dust hood 48 and processed by the separator and filter.

[0053] After grinding is completed, the output end of the hydraulic telescopic cylinder 20 is retracted, and the rotation of the drive motor 25, drive motor 37 and drive motor 45 is stopped. At the same time, the air pump can be reversed to blow dust off the grinding head 46, thereby improving the grinding quality of the grinding head 46.

[0054] After grinding, the valve stem moves back from the slide table 18 and re-engages with the support plate 142. The magnetic chuck 16 is then controlled to hold the valve stem in place. The output ends of the hydraulic telescopic cylinders 27 and 39 are retracted, and the valve stem is no longer held by the fixing component 5. The output end of the linear motor 13 is then controlled to move and reset.

[0055] Then, the output end of the first hydraulic telescopic cylinder 143 of the control flipping mechanism 14 retracts, the support plate 142 returns to a horizontal state, and then the clamping assembly 4 is controlled to clamp the polished valve stem on the support plate 142 and move it to the output conveyor belt 2. Then, the next set of valve stems is clamped, thereby completing the continuous polishing of valve stems and improving the polishing efficiency of valve stems.

[0056] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A valve stem end face grinding device, characterized in that: The system includes an input conveyor belt (1) and an output conveyor belt (2). A flipping component (3) is provided between the input conveyor belt (1) and the output conveyor belt (2). A clamping component (4) is provided on one side of the flipping component (3). A fixing component (5) is provided on the side of the flipping component (3) away from the clamping component (4). A grinding component is provided on the side of the fixing component (5) away from the flipping component (3). The fixing component (5) includes a worktable (17). A slidable slide (18) is provided on the worktable (17). A fixing seat (21) is fixedly connected to the slide (18). A circular opening (22) is opened on the fixing seat (21). A circular ring (23) is rotatably connected inside the circular opening (22). The inner ring wall of the first ring (23) is provided with several hydraulic telescopic cylinders (27). The fixed end of the hydraulic telescopic cylinder (27) is fixedly connected to the inner wall of the first ring (23). The output end of the hydraulic telescopic cylinder (27) is fixedly connected to a clamping block (28). The slide (18) is provided with a movable moving seat (29). The moving seat (29) has a circular opening (34). The circular opening (34) is rotatably connected to the second ring (35). The inner ring wall of the second ring (35) is provided with several hydraulic telescopic cylinders (39). The fixed end of the hydraulic telescopic cylinder (39) is fixedly connected to the inner wall of the second ring (35). The output end of the hydraulic telescopic cylinder (39) is fixedly connected to a clamping block (40).

2. The valve stem end face grinding device according to claim 1, characterized in that: The clamping assembly (4) includes a base (7), on which a linear motor (8) is mounted. An electric telescopic rod (9) is fixedly connected to the output end of the linear motor (8). An electric telescopic rod (10) is fixedly connected to the output end of the electric telescopic rod (9). An electric gripper (11) is fixedly connected to the output end of the electric telescopic rod (10).

3. The valve stem end face grinding device according to claim 1, characterized in that: The flipping assembly (3) includes a base (12), a linear motor (13) is provided on the upper side of the base (12), a flipping mechanism (14) is provided on the output end of the linear motor (13), the flipping mechanism includes a frame (141), a support plate (142) is provided on the upper side of the frame (141), the support plate (142) is rotatably connected to the frame (141) on the side near the fixing assembly (5), two first hydraulic telescopic cylinders (143) are provided on the side of the support plate (142) near the base (12), the fixed ends of the two first hydraulic telescopic cylinders (143) are rotatably connected to the frame (141), the output end of the first hydraulic telescopic cylinder (143) is hinged to the support plate (142), and a magnetic chuck (16) is embedded on the side of the support plate (142) away from the base (12).

4. The valve stem end face grinding device according to claim 1, characterized in that: The grinding assembly (6) includes a second worktable (41), an arc motor (42) is provided on the second worktable (41), a fourth drive motor (45) is provided on the output end of the arc motor (42), and a grinding head (46) is fixedly connected to the output end of the fourth drive motor (45).

5. The valve stem end face grinding device according to claim 4, characterized in that: A bracket (47) is fixedly connected to the output end of the arc motor (42). A dust hood (48) is fixedly connected to the side of the bracket (47) away from the output end of the arc motor (42). The dust hood (48) is sleeved on the output end of the drive motor (45) and does not directly contact it. The output end pipe of the dust hood (48) is connected to an air pump. A separator and a filter are fixedly connected to the pipe of the air pump connecting to the dust hood (48).

6. The valve stem end face grinding device according to claim 1, characterized in that: The slide (18) has two slide grooves (49) on the side near the worktable (17). The worktable (17) is fixedly connected to the slide grooves (49). The slide grooves (49) cooperate with the guide rails (19). The slide (18) is provided with a hydraulic telescopic cylinder (20) on the side near the grinding assembly (6) along its length direction. The fixed end of the hydraulic telescopic cylinder (20) is fixedly connected to the worktable (17), and the output end of the hydraulic telescopic cylinder (20) is fixedly connected to the slide (18).

7. The valve stem end face grinding device according to claim 1, characterized in that: A gear ring (24) is fixedly connected to one side of the outer ring wall of the ring (23) along its axial direction. A drive motor (25) is fixedly connected to the fixed base (21). A gear (26) is fixedly connected to the output end of the drive motor (25). The gear (26) meshes with the gear on the gear ring (24).

8. The valve stem end face grinding device according to claim 7, characterized in that: The movable base (29) has round holes (30) on both sides of its lower part along its length. The slide (18) is provided with a guide rod (31) on the side away from the worktable, corresponding to the round holes (30). The guide rod (31) is fixedly connected to a fixing block (32) on the side of its length that is close to the grinding assembly (6). The side of the guide rod (31) away from the fixing block (32) is fixedly connected to the fixed base (21). The round holes (30) cooperate with the guide rod (31). The movable base (29) has a threaded hole (15). The slide (18) is provided with a lead screw (43) on the side away from the worktable corresponding to the threaded hole (15). The lead screw (43) is screwed to the threaded hole (15). The lead screw (43) is provided with a fixing block (44) on the side of the side of the grinding assembly (6) along its length direction. The lead screw (43) is rotatably connected to the fixing block (44). The lead screw (43) is fixedly connected with a drive motor (33) on the side of the lead screw (43) away from the fixing block (44) along the axial direction. The drive motor (33) is embedded in the fixed seat (21).

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