Valve guide automatic finishing device

Abstract

This invention discloses an automatic precision machining device for valve guides, belonging to the field of precision machining technology. The device includes a vertical honing machine, with a feeding mechanism on one side for automatically feeding the valve guide. A honing head is fixedly connected to the output end of the vertical honing machine, and a honing stone is placed in the middle of the honing head. An adjusting component for adjusting the extension distance of the honing stone is located inside the honing head. This invention, by setting an adjusting component inside the honing head, in conjunction with a triggering rod at the top of the inner positioning rod, allows the triggering rod to penetrate the trigger cavity and push against the inclined surface of the adjusting block during the downward feed of the honing head, causing the adjusting block to flip outward. This changes the radial extension distance of the honing stone, matching the non-uniform distribution characteristics of the valve guide's inner hole after precision reaming—larger allowance at both ends and smaller allowance in the middle—achieving differentiated and precise cutting in different areas of the inner hole.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology, and in particular to an automatic precision machining device for valve guides. Background Technology

[0002] Valve guides are the core guiding components of the engine's valve train, and their precision directly determines the engine's sealing performance, power, emissions, and service life. Currently, the precision machining of valve guide inner holes mainly relies on honing. However, due to the structural characteristics of their slender, deep orifices (length-to-diameter ratio of 6:1 to 18:1), certain technical defects persist in mass production.

[0003] Specifically, the first issue is the inherent deformation from the preceding fine reaming process. Specifically, due to the structural requirements of deep, small holes, the reamer used is relatively slender. Consequently, during machining, the middle section of the reamer lacks radial support, making it prone to deflection and swaying during high-speed machining. This results in over 80% of valve guide workpieces exhibiting a drum-shaped deformation after fine reaming, with small diameters at both ends and a large diameter in the middle. This deformation further impacts subsequent honing processes.

[0004] Existing honing solutions use an integral constant pressure honing head, where the radial tension of the entire honing stone is completely uniform. After entering the drum-shaped inner hole, the honing stone is rigidly lifted by the smaller diameter hole walls at both ends, leaving the middle section of the honing stone suspended and unable to contact the hole wall, resulting in missed honing. Increasing the tension to eliminate missed honing leads to excessive cutting of the hole walls at both ends, resulting in over-honing. At the same time, long overhang machining exacerbates the bending deformation of the honing rod and causes over-honing at the exit, forming a flared mouth, further deteriorating the inner hole accuracy.

[0005] In summary, existing honing techniques cannot solve the inherent defects caused by uneven fine reaming allowances, resulting in low machining accuracy of the final valve guides, which fails to meet the manufacturing precision requirements of high-end engines. Therefore, it is necessary to propose improvements. Summary of the Invention

[0006] This invention provides an automatic precision machining device for valve guides, which can solve the inherent defects caused by uneven precision reaming allowance, which cannot be solved by existing technologies, namely, the low machining accuracy of the final valve guide.

[0007] This invention provides an automatic finishing device for valve guides, including a vertical honing machine. A feeding mechanism for automatically feeding valve guides is provided on one side of the vertical honing machine. A honing head is fixedly connected to the output end of the vertical honing machine. A honing stone is provided in the middle of the honing head. An adjusting component for adjusting the extension distance of the honing stone is provided inside the honing head.

[0008] As a further aspect of the present invention: the feeding mechanism includes a feeding platform, a feeding turntable is rotatably mounted in the middle of the feeding platform, a plurality of operating ports are provided on the top edge of the feeding turntable, and a flipping receiving mechanism for receiving valve guides is provided above each of the plurality of operating ports.

[0009] As a further aspect of the present invention: an inner positioning component is provided below each of the plurality of operating ports. The inner positioning component includes an electric actuator, the output end of which is fixedly connected to a movable platform. An inner positioning rod is fixedly connected to the top center of the movable platform. The diameter of the inner positioning rod is consistent with the inner diameter of the through hole of the valve guide.

[0010] As a further aspect of the present invention: the adjusting component includes a plurality of adjusting blocks, the tops of which are rotatably connected to the inner cavity of the honing head, one side of which is fixedly connected to a plurality of honing stones, and the bottom of the other side of which is set as an inclined surface, the plurality of inclined surfaces forming a trigger cavity; a trigger pressure rod is rotatably connected to the top center of the inner positioning rod, and the top of the trigger pressure rod is correspondingly set to the trigger cavity.

[0011] As a further aspect of the present invention: the top edge of the inner positioning rod is provided with a plurality of lubrication through holes, the inner walls of the plurality of lubrication through holes are all inclined outward, the interior of the inner positioning rod is provided with a lubrication cavity, the bottom of the plurality of lubrication through holes is connected to the lubrication cavity, the bottom of the lubrication cavity is fixedly connected to a lubrication pipe, and the lubrication pipe is connected to an external lubricating fluid circulation supply device.

[0012] As a further embodiment of the present invention: the flipping receiving mechanism includes a receiving frame, on both sides of the receiving frame a flipping motor is fixedly installed, the output end of the flipping motor is fixedly connected to a mounting plate, a linear guide rail is fixedly installed on one side of the mounting plate, a sliding seat is slidably installed on the inner wall of the linear guide rail, a clamping push rod is fixedly installed in the middle of the sliding seat, and a clamping sleeve is fixedly connected to the output end of the clamping push rod.

[0013] As a further embodiment of the present invention: a collection groove is provided on the top edge of the feeding platform, a collection box is provided below the collection groove, the bottom of the inner wall of the collection box is inclined, and a return pipe is fixedly connected to the side of the bottom of the collection box with a lower height. One end of the return pipe is connected to an external lubricating fluid filtration and recovery device.

[0014] As a further embodiment of the present invention: a cleaning mechanism is fixedly connected to the top center of the loading platform. The cleaning mechanism includes a mounting cover. The top of the mounting cover is inclined. An air pump is fixedly installed inside the mounting cover. A diversion cover is fixedly connected to the output end of the air pump. A plurality of cleaning air pipes are fixedly connected to the side wall of the diversion cover. One end of each of the plurality of cleaning air pipes extends to the outside of the mounting cover.

[0015] As a further aspect of the present invention: the bottom edge of the mounting cover is provided with a plurality of cleaning grooves, the inner walls of the plurality of cleaning grooves are inclined on both sides, the bottom of the diversion cover is provided with a plurality of diversion grooves, and a diversion conduit is fixedly connected between the plurality of diversion grooves and the plurality of cleaning grooves.

[0016] As a further aspect of the present invention: a closed baffle is fixedly connected to the top of the side wall of the loading platform, the closed baffle covers the top of the loading platform inside it, a processing port is provided on the side of the closed baffle near the vertical honing machine, and an adjusting air duct is fixedly connected to one side of the closed baffle, one end of the adjusting air duct is connected to an external air temperature and humidity regulating device.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention sets an adjusting component inside the honing head, which works in conjunction with the triggering rod at the top of the inner positioning rod. During the downward feeding process of the honing head, the triggering rod penetrates the trigger cavity and pushes against the inclined surface of the adjusting block, causing the adjusting block to flip outward, thereby changing the radial extension distance of the honing stone. This matches the non-uniform distribution characteristics of the inner hole after the valve guide is finely reamed, with large allowance at both ends and small allowance in the middle section. It achieves differentiated and precise cutting in different areas of the inner hole, solving the problem of the defects of insufficient honing in the middle section and over-honing at both ends caused by the inability of a single tensioning force to adapt to uneven allowance in conventional integral constant pressure honing heads. The feeding mechanism of this invention, by setting a feeding turntable and a flipping receiving mechanism, realizes the automatic feeding of valve guides from a horizontal posture and the automatic clamping and processing in a vertical posture, eliminating the need for manual feeding and unloading of each valve guide, thus greatly improving the overall processing efficiency. Through the single clamping and flipping of the flipping receiving mechanism, the posture switching of the valve guides for honing at both ends is realized, eliminating the coaxiality error caused by the secondary clamping caused by manual flipping, and improving the workpiece size consistency and product yield in mass production. This invention achieves dual clamping and positioning of valve guides—both internal radial limiting and external clamping—by setting an internal positioning component with an internal positioning rod and coordinating it with a clamping sleeve structure of a flipping material receiving mechanism. This significantly improves the vibration resistance and clamping stability of the workpiece during honing, further ensuring the accuracy of the honing process. By opening a lubrication cavity and an outwardly inclined lubrication through hole inside the internal positioning rod, lubricant is precisely delivered from bottom to top to the honing position, simultaneously completing lubrication, cooling, and real-time debris removal in the honing area. This avoids the problem of debris accumulation in the hole caused by traditional top-mounted spraying methods, ensuring the stability of the honing process. Attached Figure Description Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a cross-sectional schematic diagram of the honing head of the present invention; Figure 3 This is a three-dimensional schematic diagram of the flipping and receiving mechanism of the present invention; Figure 4 This is a schematic diagram of the position structure of the internal positioning rod of the present invention; Figure 5 This is a cross-sectional schematic diagram of the flipping and receiving mechanism of the present invention; Figure 6 This is a cross-sectional structural diagram of the feeding mechanism of the present invention; Figure 7 This is a schematic diagram of the inner wall structure of the cleaning mechanism of the present invention; Figure 8 This is a schematic diagram showing the installation state of the enclosed shield of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Vertical honing machine; 101. Honing head; 102. Honing stone; 103. Adjusting block; 2. Enclosed baffle; 201. Adjusting air duct; 301. Feeding platform; 302. Feeding turntable; 303. Electric actuator; 304. Movable table; 305. Inner positioning rod; 306. Lubrication through hole; 307. Trigger rod; 308. Lubrication pipe; 309. Collection trough; 310. Collection box; 401. Receiving rack; 402. Tilting motor; 403. Mounting plate; 404. Sliding seat; 405. Clamping push rod; 406. Clamping sleeve; 501. Mounting cover; 502. Air pump; 503. Diverter cover; 504. Diverter duct; 505. Cleaning trough; 506. Cleaning air duct. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] like Figure 1 As shown in the figure, the present invention provides an automatic valve guide finishing device, including a vertical honing machine 1. A feeding mechanism for automatically feeding the valve guide is provided on one side of the vertical honing machine 1. A honing head 101 is fixedly connected to the output end of the vertical honing machine 1. Please refer to [link to relevant documentation]. Figure 2The honing head 101 has a honing stone 102 in the middle, and the honing head 101 has an adjustment component inside for adjusting the extension distance of the honing stone 102. By setting the adjustment component inside the honing head 101, the extension distance of the honing stone 102 can be changed by pushing and adjusting it during the honing process. This is to match the characteristics of the valve guide after fine reaming: the two ends of the inner hole have a large allowance and the middle section has a small allowance. Differentiated and precise cutting can be achieved for the cutting amount of different areas of the inner hole. This solves the defect of conventional integral constant pressure honing head 101, which cannot adapt to uneven allowance due to a single tensioning force, resulting in the middle section being under-honed and the two ends being over-honed.

[0021] Please see Figure 1 and Figure 3 To improve the overall production efficiency of the equipment and change the traditional low-efficiency technology of manually loading, honing, and unloading valve guides one by one using a honing machine, the loading mechanism includes a loading platform 301. A loading turntable 302 is rotatably mounted in the middle of the loading platform 301. Several operating ports are opened on the top edge of the loading turntable 302, and a flipping receiving mechanism for receiving valve guides is set above each of the operating ports. Through the flipping receiving mechanism, stable limiting is achieved in the entire process of loading and unloading valve guides, eliminating repeated clamping errors caused by manual flipping operations, improving the consistency of workpiece dimensions and product yield in batch production, and reducing labor costs.

[0022] In one embodiment, please refer to Figure 4 and Figure 5 To position the valve guide from the inside, this application provides internal positioning components below several operating ports. Each internal positioning component includes an electric actuator 303, the output end of which is fixedly connected to a movable platform 304. The diameter of the movable platform 304 matches the diameter of the operating ports. In practice, a rubber waterproof sealing coating can be applied to the outer wall of the movable platform 304 to prevent lubricant from flowing down along the gaps. An internal positioning rod 305 is fixedly connected to the top center of the movable platform 304. The diameter of the internal positioning rod 305 matches the inner diameter of the through hole in the valve guide. The electric actuator 303 drives the movable platform 304 and the internal positioning rod 305 to rise, causing the internal positioning rod 305 to penetrate the lower part of the through hole in the valve guide, providing stable support for the valve guide from below. This further improves the stability of the valve guide during processing, thereby improving the honing accuracy.

[0023] In one embodiment, please refer to Figure 2In this embodiment, a feasible adjustment component structure is provided. The adjustment component includes several adjustment blocks 103, the tops of which are rotatably connected to the inner cavity of the honing head 101. One side of each adjustment block 103 is fixedly connected to several honing stones 102. When not in contact with the trigger lever 307, the sides of the adjustment blocks 103 away from the honing stones 102 are in contact with each other to support the honing stones 102 and improve the performance of the honing stones 102 during the honing process. The stability of the honing head 101 is achieved by setting the bottom of the other side of each of the adjustment blocks 103 as an inclined surface. The inclined surfaces together form a trigger cavity. The top center of the inner positioning rod 305 is rotatably connected to the trigger pressure rod 307. The top of the trigger pressure rod 307 is set in accordance with the trigger cavity. The top of the trigger pressure rod 307 is also set as an inclined surface. The trigger pressure rod 307 passes through the trigger cavity, and the push block flips outward, thereby pushing the honing stone 102 to flip outward and move to a different position, thereby realizing the adjustment of the overall honing cutting depth of the honing head 101.

[0024] In one embodiment, please refer to Figure 4 and Figure 5 To achieve real-time and accurate lubrication during the honing process, the top edge of the internal positioning rod 305 of this application is provided with several lubrication through holes 306. The inner walls of the lubrication through holes 306 are all inclined outwards, so that the spray direction of the lubricating oil is towards the inner wall of the valve guide through hole. That is, the lubricating oil can be directly and accurately sprayed onto the honing position, thereby achieving lubrication of the honing position at a faster speed. At the same time, it can achieve real-time discharge of honing debris and rapid cooling, minimizing the impact of high temperature and debris on honing accuracy. Compared to the traditional method of spraying lubricating oil from top to bottom onto the honing head 101 via a top-mounted lubricating oil spray pipe, this application delivers lubricating oil directly from bottom to top inside the valve guide. This effectively avoids the accumulation of debris generated during honing inside the valve guide, ensuring the cleaning and lubrication efficiency of the lubricating oil. The inner positioning rod 305 has a lubrication chamber inside, and the bottom of several lubrication through holes 306 are connected to the lubrication chamber. The bottom of the lubrication chamber is fixedly connected to a lubrication pipe 308, which is connected to an external lubrication fluid circulation supply device.

[0025] In one embodiment, please refer to Figures 3-5The flipping receiving mechanism includes a receiving frame 401, on both sides of which a flipping motor 402 is fixedly installed. The output end of the flipping motor 402 is fixedly connected to a mounting plate 403. A linear guide rail is fixedly installed on one side of the mounting plate 403. A sliding seat 404 is slidably installed on the inner wall of the linear guide rail. A clamping push rod 405 is fixedly installed in the middle of the sliding seat 404. A clamping sleeve 406 is fixedly connected to the output end of the clamping push rod 405. This application achieves stable positioning of the valve guide by setting the clamping push rod 405, which is clamped by the two sides of the valve guide from the outside. In conjunction with the internal positioning rod 305, the valve guide is stably limited. Furthermore, by setting the linear guide rail, the valve guide can be driven to move up and down in the clamping state, which facilitates the loading and unloading of the valve guide and the adjustment of its posture. At the same time, the clamping sleeve 406 can be horizontally supported by the flipping adjustment, which also facilitates cooperation with the loading and unloading equipment.

[0026] In one embodiment, please refer to Figure 6 In order to promptly discharge the lubricating fluid and debris accumulated on the top surface of the loading platform 301, a collection trough 309 is provided on the top edge of the loading platform 301. A collection box 310 is provided below the collection trough 309. The bottom of the inner wall of the collection box 310 is inclined. A return pipe is fixedly connected to the side of the bottom of the collection box 310 with a lower height. One end of the return pipe is connected to an external lubricating fluid filtration and recovery device.

[0027] In one embodiment, please refer to Figure 1 and Figure 7 A cleaning mechanism is fixedly connected to the top center of the loading platform 301. The cleaning mechanism includes a mounting cover 501, the top of which is inclined. An air pump 502 is fixedly installed inside the mounting cover 501. A diversion cover 503 is fixedly connected to the output end of the air pump 502. Several cleaning air supply pipes 506 are fixedly connected to the side wall of the diversion cover 503. One end of each cleaning air supply pipe 506 extends to the outside of the mounting cover 501. An air supply control device is fixedly installed in the middle of each cleaning air supply pipe 506. The height of the ends of several cleaning air supply pipes 506 is consistent with the height of the middle part of the clamping sleeve 406 when it is rotated to a horizontal state. This ensures that when the clamping sleeve 406 clamps the valve guide and rotates to a horizontal state, the through hole of the valve guide can be directly aligned with the end of the cleaning air supply pipe 506 to receive the air supply. Thus, after the valve guide is loaded, the air supply through the cleaning air supply pipe 506 can be used to clean the dust and debris inside the valve guide. It can also blow away the residual lubricant inside after honing is completed.

[0028] In one embodiment, the bottom edge of the mounting cover 501 is provided with a plurality of cleaning grooves 505, and the inner walls of the plurality of cleaning grooves 505 are inclined on both sides to expand the coverage of the airflow delivered by the cleaning grooves 505; the bottom of the diversion cover 503 is provided with a plurality of diversion grooves, and a diversion conduit 504 is fixedly connected between the plurality of diversion grooves and the plurality of cleaning grooves 505. By setting the diversion grooves, high-speed air is introduced into the area close to the top surface of the feeding turntable 302 for blowing, thereby assisting the impurities and lubricating fluid remaining on the top surface of the feeding turntable 302 to move toward the collection groove 309 so as to be collected and discharged in a concentrated manner.

[0029] In one embodiment, please refer to Figure 8 To improve the stability of the working environment, a transparent enclosed cover 2 is fixedly connected to the top of the side wall of the loading platform 301. The enclosed cover 2 covers the top of the loading platform 301 inside it. A processing port is provided on the side of the enclosed cover 2 near the vertical honing machine 1. An adjusting air duct 201 is fixedly connected to one side of the enclosed cover 2. One end of the adjusting air duct 201 is connected to an external air temperature and humidity regulating device to control and regulate the temperature and humidity of the working area of ​​the device in real time, reducing the impact of changes in the external environment on the finishing process.

[0030] In use, the external valve guide feeding device on one side of the loading platform 301 is first activated to precisely feed the valve guide horizontally to the receiving position of the flipping receiving mechanism at the loading station. At this time, the flipping motor 402 of the flipping receiving mechanism at the loading station synchronously drives the mounting plate 403 to rotate, causing the clamping sleeve 406 to rotate to a horizontal position aligned with the feeding direction. The clamping push rod 405 drives the clamping sleeve 406 to open. After the feeding mechanism pushes the valve guide between the two clamping sleeves 406, the clamping... Push rod 405 drives clamping sleeve 406 to close and complete workpiece pre-clamping. Then, the loading turntable 302 in the middle of loading table 301 rotates, rotating the operation port receiving the workpiece toward the processing station of vertical honing machine 1. During the rotation through the port of cleaning air pipe 506, the air pump 502 of the cleaning mechanism starts. The generated airflow is divided by the diverter hood 503 and sent out through the cleaning air pipe 506, directly facing the horizontal valve guide through hole to remove the dust and debris inside. Subsequently, the flipping motor 402 drives the mounting plate 403 to rotate, causing the clamped and fixed valve guide to rotate to a vertical position and be coaxially aligned with the lower operating port; then the loading turntable 302 in the middle of the loading platform 301 continues to rotate, rotating the operating port that receives the workpiece to the processing position of the vertical honing machine 1, and simultaneously driving the flipping receiving mechanism and the workpiece to move into place. Subsequently, the electric actuator 303 of the inner positioning component is activated, driving the movable table 304 to rise upward along the operating port, which in turn moves the inner positioning rod 305 at the top center of the movable table 304 upward, so that the inner positioning rod 305 passes through the lower part of the valve guide through hole, completing radial limiting and bottom support from inside the workpiece, and cooperating with the clamping sleeve 406 to complete the final clamping and positioning of the workpiece; at the same time, the external lubricating fluid circulation supply equipment is activated, and the lubricating oil is sent into the lubrication cavity inside the inner positioning rod 305 through the lubrication pipe 308, and then sent out towards the inner wall of the valve guide through hole through several lubrication through holes 306 that are opened outward at the top edge of the inner positioning rod 305; The output end of the vertical honing machine 1 drives the honing head 101 to feed downwards, extending into the through hole of the valve guide. During the downward movement of the honing head 101, the trigger rod 307, which is rotatably connected to the top of the inner positioning rod 305, passes into the trigger cavity inside the honing head 101. The inclined surface at the top of the trigger rod 307 fits against the inclined surface at the bottom of the adjusting block 103, causing each adjusting block 103 to rotate outwards around its top rotatable connection point with the inner cavity of the honing head 101. This, in turn, pushes the adjusting block 103... The honing stone 102, which is fixedly connected to the honing stone, is flipped outward to adjust the radial extension distance of the honing stone 102. During honing, the honing head 101 rotates and reciprocates axially with the output end of the vertical honing machine 1. The honing stone 102 is used to hone the inner hole of the valve guide. During the process, the honing head 101 and the inner positioning rod 305 can be raised and lowered at different amplitudes to flexibly adjust the honing position and honing depth of the honing stone 102. After the first honing process is completed, the vertical honing machine 1 drives the honing head 101 to move upward back to the initial position. The electric push rod 303 of the inner positioning component drives the movable table 304 and the inner positioning rod 305 to move downward and disengage from the valve guide through hole. The flipping motor 402 of the flipping receiving mechanism starts, and drives the linear guide, sliding seat 404 and the valve guide clamped and fixed to rotate synchronously by half a turn through the mounting plate 403, completing the coaxial flipping of the workpiece. After flipping to the position, the electric push rod 303 drives the inner positioning rod 305 to lift upward and insert into the workpiece through hole, completing the secondary clamping and positioning. Then, the vertical honing machine 1 drives the honing head 101 to feed downward again, extending into the flipped valve guide through hole, repeating the above honing process to complete the honing process of the other end of the workpiece.

[0031] After the secondary honing process is completed, the honing head 101 retracts to the initial position, the inner positioning rod 305 retracts downwards, and the loading turntable 302 rotates, moving the processed workpiece to the unloading station. During this process, the workpiece is rotated to a horizontal state by the flipping receiving mechanism, the air pump 502 of the cleaning mechanism is started, and part of the generated airflow is sent out through the cleaning air supply pipe 506. Air is also sent out through the valve guide hole in the horizontal state to send out the residual lubricant inside. Another path is sent out through the diversion pipe 504 and the cleaning groove 505 at the bottom of the mounting cover 501, blowing the impurities and lubricant on the top surface of the loading turntable 302 into the collection groove 309 on the top edge of the loading platform 301. When the loading turntable 302 rotates to the unloading station, the clamping push rod 405 drives the clamping sleeve 406 to open, the unloading mechanism receives the finished product air valve guide and discharges it outwards, completing the workpiece unloading.

[0032] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An automatic finishing device for valve guides, characterized in that, The equipment includes a vertical honing machine (1), on one side of which is a feeding mechanism for automatically feeding valve guides. A honing head (101) is fixedly connected to the output end of the vertical honing machine (1). A honing stone (102) is provided in the middle of the honing head (101). An adjusting component for adjusting the extension distance of the honing stone (102) is provided inside the honing head (101).

2. The automatic valve guide finishing device as described in claim 1, characterized in that, The feeding mechanism includes a feeding platform (301), a feeding turntable (302) is rotatably installed in the middle of the feeding platform (301), and a number of operating ports are opened on the top edge of the feeding turntable (302). A flipping receiving mechanism for receiving valve guides is provided above each of the operating ports.

3. The automatic finishing device for valve guides as described in claim 2, characterized in that, An internal positioning component is provided below each of the aforementioned operating ports. The internal positioning component includes an electric actuator (303). The output end of the electric actuator (303) is fixedly connected to a movable platform (304). An internal positioning rod (305) is fixedly connected to the top center of the movable platform (304). The diameter of the internal positioning rod (305) is consistent with the inner diameter of the through hole of the valve guide.

4. The automatic valve guide finishing device as described in claim 3, characterized in that, The adjusting component includes several adjusting blocks (103), the tops of which are rotatably connected to the inner cavity of the honing head (101), one side of which is fixedly connected to several honing stones (102), and the bottom of the other side of which is set as an inclined surface, and the several inclined surfaces enclose a trigger cavity; the top center of the inner positioning rod (305) is rotatably connected to a trigger pressure rod (307), and the top of the trigger pressure rod (307) is correspondingly set to the trigger cavity.

5. The automatic valve guide finishing device as described in claim 3, characterized in that, The top edge of the inner positioning rod (305) is provided with a plurality of lubrication through holes (306), the inner walls of the plurality of lubrication through holes (306) are all inclined outward, the inner positioning rod (305) is provided with a lubrication cavity, the bottom of the plurality of lubrication through holes (306) is connected to the lubrication cavity, and the bottom of the lubrication cavity is fixedly connected to a lubrication pipe (308).

6. The automatic finishing device for valve guides as described in claim 2, characterized in that, The flipping receiving mechanism includes a receiving frame (401), on both sides of the receiving frame (401) a flipping motor (402) is fixedly installed, the output end of the flipping motor (402) is fixedly connected to a mounting plate (403), a linear guide rail is fixedly installed on one side of the mounting plate (403), a sliding seat (404) is slidably installed on the inner wall of the linear guide rail, a clamping push rod (405) is fixedly installed in the middle of the sliding seat (404), and a clamping sleeve (406) is fixedly connected to the output end of the clamping push rod (405).

7. The automatic valve guide finishing device as described in claim 2, characterized in that, The top edge of the loading platform (301) is provided with a collection groove (309), and a collection box (310) is provided below the collection groove (309). The bottom of the inner wall of the collection box (310) is inclined, and a return pipe is fixedly connected to the side of the collection box (310) with a lower bottom height.

8. The automatic valve guide finishing device as described in claim 2, characterized in that, A cleaning mechanism is fixedly connected to the top center of the loading platform (301). The cleaning mechanism includes a mounting cover (501). The top of the mounting cover (501) is inclined. An air pump (502) is fixedly installed inside the mounting cover (501). A diversion cover (503) is fixedly connected to the output end of the air pump (502). Several cleaning air pipes (506) are fixedly connected to the side wall of the diversion cover (503). One end of each of the cleaning air pipes (506) extends to the outside of the mounting cover (501).

9. The automatic finishing device for valve guides as described in claim 8, characterized in that, The bottom edge of the mounting cover (501) is provided with a plurality of cleaning grooves (505), and the inner walls of the plurality of cleaning grooves (505) are inclined on both sides. The bottom of the diversion cover (503) is provided with a plurality of diversion grooves, and a diversion conduit (504) is fixedly connected between the plurality of diversion grooves and the plurality of cleaning grooves (505).

10. The automatic finishing device for valve guides as described in claim 2, characterized in that, A closed baffle (2) is fixedly connected to the top of the side wall of the loading platform (301). The closed baffle (2) covers the top of the loading platform (301) inside it. A processing port is provided on the side of the closed baffle (2) near the vertical honing machine (1). An adjusting air duct (201) is fixedly connected to one side of the closed baffle (2).

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