Automatic feeding and discharging equipment for valve rod machine tool machining

Abstract

The invention relates to the technical field of valve rod machining, in particular to automatic feeding and discharging equipment for valve rod machine tool machining, which comprises a main body frame, and further comprises a control host arranged on the main body frame, a fixed shaft fixed on the main body frame and a rotating seat arranged on one side of the main body frame, self-locking linear motors and guide rails are symmetrically arranged on the inner sides of the rotating frames; metal chips on the surface of the valve rod are blown away through the cleaning and material taking assembly, the one-way protection assembly is combined to prevent the chips from entering an air path, abrasion of the second clamping jaw is effectively relieved, the service life of the second clamping jaw is prolonged, through a mechanical limiting redundancy mechanism formed by transverse auxiliary alignment and an adjustable limiting stop block, the alignment precision can still be guaranteed when electric control fails or parts are abraded, and the working efficiency is improved. And the risks of clamping failure, workpiece damage and equipment collision are obviously reduced.

Description

Technical Field

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

[0002] In the field of modern mechanical manufacturing, especially in industries such as automobiles, hydraulics, and valves, valve stems are key transmission or sealing components. Their machining accuracy and surface quality directly affect the performance and lifespan of the entire machine. In order to improve the level of automation and processing stability, automatic loading and unloading equipment has been gradually introduced in recent years. These automated systems typically integrate multi-axis robots, precision conveyor lines, special positioning fixtures, and sensor feedback units. They can work together to automatically feed valve stem blanks or semi-finished products, accurately clamp them, unload them after processing, and transfer them to the next process in an orderly manner.

[0003] However, existing automatic loading and unloading systems still face several technical bottlenecks in practical applications. On the one hand, during machining processes such as turning and milling, a large amount of high-temperature metal chips are generated and adhere to the valve stem. These chips are easily adsorbed by factors such as electrostatic adsorption and adhere to the key actuators of the loading and unloading mechanism, such as the clamping surface of the chuck structure, leading to increased wear of the chuck. On the other hand, the accurate positioning of the valve stem during loading and unloading depends on the coordinated control of the CNC program and the servo electronic control system, but there is a lack of an effective mechanical limit redundancy protection mechanism. Under long-term operation, component wear, or sudden program abnormalities, it is very easy to cause alignment deviations, which in turn lead to risks such as clamping failure, workpiece damage, or even equipment collision. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic loading and unloading device for valve stem machining, in order to solve the problems mentioned in the background art of current automatic loading and unloading devices for valve stem machining, such as metal chips easily adhering to the clamping surface of the chuck, aggravating their wear, valve stem positioning relying too much on the electronic control system and lacking mechanical limit protection, which can easily cause alignment deviations when worn or the program is abnormal, leading to clamping failure, workpiece damage or even equipment collision.

[0005] An automatic loading and unloading device for valve stem machining includes a main frame, a control host mounted on the main frame, a fixed shaft fixed on the main frame, and a rotating seat located on one side of the main frame. A rotating frame is hinged to the middle of the rotating seat. A self-locking linear motor and a guide rail are symmetrically arranged inside the rotating frame. A movable block is mounted on the self-locking linear motor, and a movable plate is fixedly connected to the movable block. A hanging plate is fixedly mounted on the movable plate, and a mounting frame is provided on the hanging plate. Two guide rods are symmetrically arranged inside the mounting frame, and a movable block is movably connected inside the mounting frame. The guide rods pass through the movable block to provide guidance. An electric push rod is provided between the movable block and the hanging plate. A rotary actuator is mounted on the movable block, and the rotary actuator is connected to the mounting block. A loading component is provided on one side of the mounting block, and a cleaning and picking component is mounted on the side of the mounting block adjacent to the loading component. A one-way protection component is provided on the cleaning and picking component. A height auxiliary alignment component is mounted on the rotating frame, and a limit component and a lateral auxiliary alignment component are also mounted on the rotating frame.

[0006] Preferably, the main frame has an installation cavity, and a height adjustment assembly is installed inside the installation cavity. The height adjustment assembly includes a first fixed frame, a second fixed frame, a dual-axis motor, a worm gear, a worm wheel, a threaded tube, a screw, a base plate, and positioning rods. The first fixed frame and the second fixed frame are installed inside the installation cavity. The dual-axis motor is mounted on the first fixed frame, and the worm gear is connected to both ends of the dual-axis motor. Two worm wheels are mounted on the second fixed frame through bearings. The worm wheels are driven by the worm gear. A threaded tube is installed in the middle of the worm wheels, and a screw is driven by the threaded tube. One end of the screw is fixedly connected to the base plate. Multiple positioning rods are fixedly connected to the base plate. The positioning rods are slidably connected to the main frame. The dual-axis motor is electrically connected to the control host.

[0007] Preferably, a rotating shaft is installed on the rotating frame, and a rotating storage assembly is provided between the rotating shaft and the fixed shaft. The rotating storage assembly includes a first connecting frame, a servo electric cylinder, and a second connecting frame. The first connecting frame is rotatably connected to the fixed shaft, and the second connecting frame is rotatably connected to the rotating shaft. A servo electric cylinder is provided between the first connecting frame and the second connecting frame, and the servo electric cylinder is electrically connected to the control host.

[0008] Preferably, the feeding assembly includes a first drive base and a first gripper; the first drive base is installed on one side of the mounting block, and multiple first grippers are provided on the first drive base; the rotary actuator and the first grippers are both electrically connected to the control host.

[0009] Preferably, the cleaning and material handling assembly includes a second drive base, a second gripper, a connecting pipe, a micro high-pressure pump, and an air supply pipe. The second drive base is installed on the side of the mounting block adjacent to the first drive base. Multiple second grippers are connected to the second drive base. The second grippers are provided with connecting pipes and multiple air jet holes are opened on the second grippers. The air jet holes communicate with the connecting pipes through cavities opened inside the second grippers. A micro high-pressure pump is installed on the side of the mounting block opposite to the first drive base. The micro high-pressure pump is connected to the connecting pipes through the air supply pipe. A one-way protection component is provided in the air jet holes. The second drive base and the micro high-pressure pump are both electrically connected to the control host.

[0010] Preferably, the rotating frame is equipped with an installation strip, which has two positioning installation slots. A feeding hopper is aligned and hung in the positioning installation slot. A hanging frame is provided on the feeding hopper, and a collection frame is connected inside the hanging frame. The surfaces of the first and second grippers are coated with high-temperature resistant soft polytetrafluoroethylene or silicone.

[0011] Preferably, the one-way protection assembly includes a valve body, an anti-detachment plate, a connecting rod, a sealing plate, a plug, a through hole, a push post, a snap ring, a mating ring, and an elastic sealing membrane. The valve body is installed inside the air jet hole on the second gripper. An anti-detachment plate is installed inside the valve body, and the anti-detachment plate is connected to one end of the connecting rod. The other end of the connecting rod passes through the valve body housing and connects to the sealing plate. A spring is installed between the anti-detachment plate and the valve body housing. Multiple plugs are installed on the sealing plate. Through holes are opened on the valve body at positions corresponding to the plugs. A snap ring is fixedly installed on the sealing plate and fixedly connected to the valve body. A mating ring is snapped onto the snap ring. An elastic sealing membrane is located in the middle of the mating ring. The elastic sealing membrane is made of elastic silicone material and has a cross-shaped opening in the middle. One side of the elastic sealing membrane abuts against the push post, and the other side of the elastic sealing membrane is concave.

[0012] Preferably, the height-assisted alignment component includes a hanger, a crash stop, and a first laser; the rotating frame is fixedly connected to one end of the hanger, and the other end of the hanger is provided with a crash stop. The first laser is installed on the hanger, and the bottom height of the crash stop is lower than the bottom height of the mounting block. When the first laser is working, the laser emitted by it is at the same height as the center point of the first gripper and the second gripper.

[0013] Preferably, the limiting component includes a fixed frame, a self-locking stepper motor, a lead screw, and a stop block; the fixed frame is mounted on the rotating frame, the self-locking stepper motor is fixedly mounted on the outside of the fixed frame, the lead screw is connected to the inside of the fixed frame through a bearing, the lead screw is connected to the output end of the self-locking stepper motor, the stop block is slidably connected inside the fixed frame, the stop block is threadedly connected to the lead screw, one side of the stop block is slidably connected to the guide rail, a proximity sensor is mounted on the stop block, a trigger plate is provided on the side of the movable plate opposite to the proximity sensor, and the proximity sensor, the self-locking stepper motor, and the control host are electrically connected.

[0014] Preferably, the lateral auxiliary alignment component includes a connecting frame and a second laser; a connecting frame is provided on one side of the block, and the second laser is installed on the connecting frame. When the movable plate contacts the block, the laser emitted by the second laser and the axis of the rotary actuator are located in the same positive vertical plane perpendicular to the lead screw axis.

[0015] The beneficial effects of this invention are: 1. The cleaning and picking component blows away the metal debris on the surface of the valve stem before it is gripped after processing. At the same time, the one-way protection component prevents metal debris from entering the internal air passage. The two work together to reduce the wear of the second gripper and improve its service life. 2. Before formal operation, the operator uses the horizontal auxiliary alignment component and the machine tool clamping station for processing valve stem as a reference. The operator adjusts the position of the limit block to realize the mechanical limit redundancy protection mechanism. In the case of long-term operation, component wear or sudden program abnormality, the alignment deviation is reduced, thereby reducing the risk of clamping failure, workpiece damage or even equipment collision. 3. The height-assisted alignment component is used for auxiliary reference, and the height adjustment component is used to adjust the loading and unloading height of the valve stem, thereby avoiding alignment errors; 4. When not in use for a long period of time, first remove the feeding hopper and collection box, then use the rotating storage component to fold them back and save space; 5. The surfaces of the first and second grippers are coated with high-temperature resistant soft polytetrafluoroethylene or silicone to prevent scratches when gripping the valve stem. Attached Figure Description

[0016] Figure 1 The view shown is an isometric side view of the overall structure of the invention. Figure 2 The diagram shown is a side view of the main structure of the present invention; Figure 3 The diagram shown is a schematic representation of the height adjustment component of the present invention. Figure 4 The diagram shown is a schematic representation of the rotating storage component of the present invention. Figure 5 The diagram shown is a schematic representation of the mounting strip installation structure of the present invention. Figure 6 The diagram shown is a schematic of the installation structure of the feeding hopper and collecting frame of the present invention. Figure 7 The diagram shown is a schematic of the rotating frame mounting structure of the present invention; Figure 8 The diagram shown is a schematic representation of the mounting block installation structure of the present invention. Figure 9 The diagram shown is an installation schematic of the cleaning and material handling assembly of the present invention; Figure 10The diagram shown is a detailed installation structure of the second drive base of the present invention; Figure 11 The diagram shown is a cross-sectional view of the second gripper structure of the present invention. Figure 12 The image shown is a top view of the disassembled structure of the unidirectional protection component of the present invention; Figure 13 The image shown is a bottom view of the disassembled structure of the unidirectional protection component of the present invention; Figure 14 The diagram shown is a schematic of the highly assisted alignment component structure of the present invention; Figure 15 The diagram shown is a schematic diagram of the lateral limiting component structure of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Main frame; 2. Control host; 3. Mounting cavity; 5. Fixed shaft; 6. Rotary seat; 7. Rotating frame; 8. Rotating shaft; 10. Mounting strip; 11. Positioning mounting groove; 12. Feeding hopper; 13. Hanging bracket; 14. Collection frame; 15. Self-locking linear motor; 16. Guide rail; 17. Movable block; 18. Movable plate; 19. Hanging plate; 20. Mounting frame; 21. Guide rod; 22. Moving block; 23. Electric push rod; 24. Rotary actuator; 25. Mounting block; 401. First fixed frame; 402. Second fixed frame; 403. Dual-axis motor; 404. Worm gear; 405. Worm wheel; 406. Threaded pipe; 407. Screw; 408. Base plate; 409. Positioning rod; 901. First connecting frame; 902. Servo electric motor Cylinder; 903, Second connecting frame; 2601, First drive base; 2602, First gripper; 2701, Second drive base; 2702, Second gripper; 2703, Connecting pipe; 2704, Miniature high-pressure pump; 2705, Air supply pipe; 2801, Valve body; 2802, Anti-detachment plate; 2803, Connecting rod; 2804, Sealing plate; 2805, Plug; 2806, Through hole; 2807, Push column; 2808, Snap-fit ​​ring; 2809, Connecting ring; 2810, Elastic sealing membrane; 2901, Hanger; 2902, Anti-collision seat; 2903, First laser; 3001, Fixing frame; 3002, Self-locking stepper motor; 3003, Lead screw; 3004, Stop block; 3101, Connecting frame; 3102, Second laser. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please see Figures 1 to 15This invention provides an embodiment of an automatic loading and unloading device for valve stem machining, comprising a main frame 1, a control host 2 mounted on the main frame 1, a fixed shaft 5 fixed on the main frame 1, and a rotating seat 6 disposed on one side of the main frame 1. A rotating frame 7 is hinged to the middle of the rotating seat 6, and mounting strips 10 are installed on the rotating frame 7. A self-locking linear motor 15 and guide rails 16 are symmetrically arranged on the inner side of the rotating frame 7. A movable block 17 is mounted on the self-locking linear motor 15, and a movable plate 18 is fixedly connected to the movable block 17. A hanging plate 19 is fixedly mounted on the movable plate 18, and a mounting frame 20 is provided on the hanging plate 19. Two guide rods 21 are symmetrically arranged inside the frame 20. A movable block 22 is movably connected inside the frame 20. The guide rods 21 pass through the movable block 22 to provide guidance. An electric push rod 23 is provided between the movable block 22 and the hanging plate 19. A rotary actuator 24 is installed on the movable block 22. A mounting block 25 is connected to the rotary actuator 24. A first drive base 2601 is provided on one side of the mounting block 25. The first drive base 2601 is provided with multiple first grippers 2602. A second drive base 2701 is installed on the side of the mounting block 25 adjacent to the first drive base 2601. Multiple second grippers are connected to the second drive base 2701. 2702, the second gripper 2702 is provided with a connecting pipe 2703, and multiple air jet holes are opened on the second gripper 2702. The air jet holes are connected to the connecting pipe 2703 through the internal cavity of the second gripper 2702. A miniature high-pressure pump 2704 is installed on the mounting block 25 on the side opposite to the first drive base 2601. The miniature high-pressure pump 2704 is connected to the connecting pipe 2703 through an air supply pipe 2705. A one-way protective component is provided in the air jet hole. A hanger 2901 is installed on the rotating frame 7. A collision protection seat 2902 is provided at the other end of the hanger 2901. A first laser 2903 is installed on the hanger 2901. A fixed... A fixed frame 3001 is included. A self-locking stepper motor 3002 is fixed on the outside of the fixed frame 3001. A lead screw 3003 is connected to the inside of the fixed frame 3001 through a bearing. The lead screw 3003 is connected to the output end of the self-locking stepper motor 3002. A stop block 3004 is slidably connected inside the fixed frame 3001. The stop block 3004 is threadedly connected to the lead screw 3003. One side of the stop block 3004 is slidably connected to the guide rail 16. A proximity sensor is installed on the stop block 3004. A trigger plate is provided on the side of the movable plate 18 opposite to the proximity sensor. A connecting frame 3101 is provided on one side of the stop block 3004. A second laser 3102 is installed on the connecting frame 3101.

[0020] Please see Figures 1 to 15In this embodiment, the main frame 1 has an installation cavity 3, and the installation cavity 3 has a first fixing frame 401 and a second fixing frame 402. The first fixing frame 401 has a dual-axis motor 403, and the two ends of the dual-axis motor 403 are connected to worm gears 404. The second fixing frame 402 has two worm wheels 405 installed on it through bearings. The worm wheels 405 mesh with the worm gears 404 for transmission. A threaded tube 406 is fixed in the middle of the worm wheel 405. A screw 407 is threadedly connected to the threaded tube 406. A base plate 408 is fixedly connected to the lower end of the screw 407. A plurality of positioning rods 409 are fixed on the base plate 408. The positioning rods 409 slide with the main frame 1. The dual-axis motor 403 is electrically connected to the control host 2. The dual-axis motor 403 synchronously drives the worm gears 404 on both sides to rotate, thereby driving the worm wheels 405 and the threaded tube. Rotating screw 406 extends the length of the main frame 1, thereby adjusting the vertical height of the equipment. A rotating shaft 8 is installed on the rotating frame 7. A rotating storage assembly is provided between the rotating shaft 8 and the fixed shaft 5. The rotating storage assembly includes a first connecting frame 901, a second connecting frame 903, and a servo electric cylinder 902. The first connecting frame 901 is rotatably connected to the fixed shaft 5, and the second connecting frame 903 is rotatably connected to the rotating shaft 8. The servo electric cylinder 902 is hinged between the first connecting frame 901 and the second connecting frame 903. When the servo electric cylinder 902 extends or retracts, it pushes the rotating frame 7 to rotate around the rotating seat 6, realizing the switching between the working state and the storage state of the equipment. When the equipment is not in use, the feeding hopper 12 and the collection frame 14 are removed first, and then the host 2 drives the servo electric cylinder 902 to extend, folding the rotating frame 7 downwards.

[0021] Please see Figures 1 to 15In this embodiment, the mounting strip 10 has two positioning mounting slots 11, and a feeding hopper 12 is hung in the positioning mounting slot 11. A hanging bracket 13 is provided on the feeding hopper 12, and a collection frame 14 is connected inside the hanging bracket 13. The surfaces of the first gripper 2602 and the second gripper 2702 are both coated with a high-temperature resistant soft polytetrafluoroethylene layer. A one-way protection component is provided in the jet hole of the second gripper 2702, including a valve body 2801, an anti-detachment plate 2802, a connecting rod 2803, a sealing plate 2804, a plug 2805, a through hole 2806, and a pusher. The valve body 2801 is fixed to the inner wall of the jet hole, consisting of a column 2807, a snap ring 2808, a mating ring 2809, and an elastic sealing membrane 2810. An anti-detachment plate 2802 is fixed to the inner cavity of the valve body 2801. One end of a connecting rod 2803 is fixed to the anti-detachment plate 2802, and the other end extends out of the valve body 2801 and connects to the sealing plate 2804. A spring is installed between the anti-detachment plate 2802 and the valve body 2801 housing. Multiple plugs 2805 are provided on the sealing plate 2804. Through holes 2806 are opened at corresponding positions on the valve body 2801 housing for sealing. A snap-fit ​​ring 2808 is fixed to the outside of plate 2804, and a snap-fit ​​ring 2808 is also provided on the outside of valve body 2801. A mating ring 2809 is snapped between the two snap-fit ​​rings 2808. An elastic sealing membrane 2810 is embedded in the center of the mating ring 2809. The elastic sealing membrane 2810 is made of silicone, with a cross-shaped opening in the center, an inwardly concave arc shape on the inner side, and abutting against the push rod 2807 on the outer side. When the miniature high-pressure pump 2704 supplies air, the air pressure first pushes the plug 2805 away from the through hole 2806, thereby driving the sealing plate 2804 and the connecting rod 2803. When the anti-detachment plate 2802 moves, the spring is compressed. At the same time, the pusher 2807 on the sealing plate 2804 and the air pressure work together to push the elastic sealing membrane 2810 outward, opening the cross opening. The airflow blows through the through hole 2806 onto the processed valve stem, blowing away metal shavings. After the air supply stops, the spring returns to its original position, causing the pusher 2807, sealing plate 2804, connecting rod 2803, and anti-detachment plate 2802 to reset. The elastic sealing membrane 2810 rebounds and closes the cross opening, preventing debris from flowing back in, reducing the wear of the second gripper 2702, and improving its service life.

[0022] Please see Figures 1 to 15In this embodiment, one end of the hanger 2901 is fixed to the rotating frame 7, and the other end is lower than the bottom of the mounting block 25 and is provided with an anti-collision seat 2902. The laser beam emitted by the first laser 2903 is horizontally emitted, and its optical axis height is flush with the clamping center point of the first gripper 2602 and the second gripper 2702. The self-locking stepper motor 3002 is controlled by the control host 2. When rotating, it drives the lead screw 3003 to rotate, so that the block 3004 moves horizontally along the fixed frame 3001 and the guide rail 16 to the preset position. After the proximity sensor on the block 3004 detects that the trigger piece of the movable plate 18 is in place, it sends a feedback signal to the control host 2. When the self-locking linear motor 15 fails, the front end of the movable plate 18 hits the block 3004 and is physically blocked. The second laser 3102 on the connecting frame 3101 emits a vertical laser beam. When the movable plate 18 abuts against the block 3004, the laser beam passes through the rotation axis of the rotary actuator 24 and is perpendicular to the axis of the lead screw 3003, forming a lateral alignment reference surface.

[0023] Working principle: Before starting the equipment, the dual-axis motor 403 is started by operating the program on the control host 2, which synchronously drives the worm gear 404 to rotate, driving the worm wheel 405 and the threaded tube 406 to rotate. The length of the screw 407 extending out of the main frame 1 is adjusted, thereby adjusting the vertical height of the equipment until the beam of the first laser 2903 is aligned with the center height of the machine tool chuck, completing the vertical alignment. Then, the second laser 3102 is turned on, and the control host 2 sets the target position of the self-locking stepper motor 3002, driving the lead screw 3003 to rotate so that the stop block 3004 moves to the corresponding limit point, aligning it with the vertical plane where the center of the machine tool spindle is located, completing the horizontal mechanical limit reference setting. During the first loading, the rotary actuator 24 drives the mounting block 25 to rotate, so that the first clamp The first gripper 2602 faces the valve stem of the hopper 12; the electric push rod 23 pushes the moving block 22 to move along the guide rod 21, so that the first gripper 2602 approaches the valve stem; the first drive base 2601 controls the first gripper 2602 to grab the valve stem; the electric push rod 23 drives the moving block 22 to reset; the control host 2 drives the movable block 17 to move along the guide rail 16 through the self-locking linear motor 15, and at the same time, when the trigger plate on the movable plate 18 approaches the proximity sensor on the resistance block 3004 and reaches the preset value, the self-locking stepper motor 3002 stops working, and the physical limit of the resistance block 3004 realizes the mechanical limit redundancy protection mechanism; the electric push rod 23 extends, and the first gripper 2602 sends the valve stem into the lathe clamping mechanism to complete the clamping and fixing; the first drive base 2601 controls the first drive block 2602 to grab the valve stem. One gripper 2602 releases the valve stem; the electric push rod 23 drives the moving block 22 to reset; the control host 2 drives the movable block 17 to reset via the self-locking linear motor 15. The cycle begins, and the control host 2 drives the electric push rod 23 to move the moving block 22, bringing the first gripper 2602 closer to the valve stem. The first drive base 2601 is a common electric gripper drive base, containing a power source (such as a servo motor or stepper motor) and a transmission structure (such as responsible for converting the motor's rotational motion into the linear motion of the gripper fingers). Since the structure of the electric gripper drive base is known technology and many mature products are available, it will not be described in detail here. The first drive base 2601 controls the first gripper 2602 to grasp the valve stem; the electric push rod 23 drives the moving block 22... Reset; the control host 2 drives the mounting block 25 to rotate through the rotary actuator 24, so that the second drive base 2701 rotates to the original position of the first drive base 2601; the control host 2 drives the movable block 17 to move through the self-locking linear motor 15; the control host 2 drives the micro high-pressure pump 2704 to work, and the airflow enters the connecting pipe 2703 through the air supply pipe 2705. The air pressure first pushes the plug 2805 away from the through hole 2806, and drives the sealing plate 2804, the connecting rod 2803, and the anti-detachment plate 2802 to move. The spring is compressed, and at the same time, the push column 2807 on the sealing plate 2804 and the air pressure work together to push the elastic sealing membrane 2810 to bulge outward, so that the cross opening opens. The airflow blows through the through hole 2806 to the processed valve stem and blows away the metal chips.After the gas supply is stopped, the spring returns to its original position, causing the push column 2807, sealing plate 2804, connecting rod 2803, and anti-detachment plate 2802 to reset. The elastic sealing membrane 2810 rebounds and closes the cross opening. The second drive base 2701 controls the second gripper 2702 to clamp the machined valve stem. After the electric push rod 23 resets, the control host 2 rotates in the opposite direction through the rotary actuator 24, causing the first gripper 2602 to face the lathe clamping mechanism. The electric push rod 23 extends, and the first gripper 2602 sends the valve stem into the lathe clamping mechanism to complete the clamping and fixing. The first drive base The base 2601 controls the first gripper 2602 to release the valve stem; the electric push rod 23 drives the moving block 22 to reset; the control host 2 drives the movable block 17 to reset via the self-locking linear motor 15; the electric push rod 23 pushes the moving block 22 to move, and the second drive base 2701 controls the second gripper 2702 to release the processed valve stem, causing it to fall into the collection frame 14. When the equipment is not in use, after removing the hopper 12 and the collection frame 14, the control host 2 drives the servo electric cylinder 902 to extend, folding the rotating frame 7 downwards to save space.

Claims

1. An automatic loading and unloading device for valve stem machining, comprising a main frame (1), characterized in that: It also includes a control host (2) installed on the main frame (1), a fixed shaft (5) fixed on the main frame (1), and a rotating seat (6) set on one side of the main frame (1). A rotating frame (7) is hinged in the middle of the rotating seat (6). An installation strip (10) is installed on the rotating frame (7). A self-locking linear motor (15) and a guide rail (16) are symmetrically arranged inside the rotating frame (7). A movable block (17) is installed on the self-locking linear motor (15). A movable plate (18) is fixedly connected to the movable block (17). A hanging plate (19) is fixedly installed on the movable plate (18). An installation frame (20) is set on the hanging plate (19). Two symmetrically arranged inside the installation frame (20) are provided. A guide rod (21) is movably connected to a moving block (22) inside the mounting frame (20). The guide rod (21) passes through the moving block (22) and plays a guiding role. An electric push rod (23) is provided between the moving block (22) and the hanging plate (19). A rotary actuator (24) is installed on the moving block (22). A mounting block (25) is connected to the rotary actuator (24). A feeding component is provided on one side of the mounting block (25). A cleaning and picking component is installed on the side of the mounting block (25) adjacent to the feeding component. A one-way protection component is provided on the cleaning and picking component. A height auxiliary alignment component is installed on the rotating frame (7). A limit component and a lateral auxiliary alignment component are also installed on the rotating frame (7).

2. The automatic loading and unloading equipment for valve stem machining according to claim 1, characterized in that: The main frame (1) has an installation cavity (3), and a height adjustment assembly is installed in the installation cavity (3). The height adjustment assembly includes a first fixing frame (401), a second fixing frame (402), a dual-axis motor (403), a worm gear (404), a worm wheel (405), a threaded pipe (406), a screw (407), a base plate (408), and a positioning rod (409). The first fixing frame (401) and the second fixing frame (402) are installed in the installation cavity (3), and the dual-axis motor (403) is installed on the first fixing frame (401). The dual-axis motor (403) is connected to worm gears (404) at both ends. Two worm wheels (405) are installed on the second fixed frame (402) through bearings. The worm wheels (405) are connected to the worm gears (404) in a transmission connection. A threaded tube (406) is installed in the middle of the worm wheel (405). A screw (407) is connected in a transmission connection inside the threaded tube (406). A base plate (408) is fixedly connected to one end of the screw (407). Multiple positioning rods (409) are fixedly connected to the base plate (408). The positioning rods (409) are slidably connected to the main frame (1).

3. An automatic loading and unloading device for valve stem machining according to claim 2, characterized in that: A rotating shaft (8) is installed on the rotating frame (7). A rotating storage assembly is provided between the rotating shaft (8) and the fixed shaft (5). The rotating storage assembly includes a first connecting frame (901), a servo electric cylinder (902), and a second connecting frame (903). The first connecting frame (901) is rotatably connected to the fixed shaft (5), and the second connecting frame (903) is rotatably connected to the rotating shaft (8). A servo electric cylinder (902) is provided between the first connecting frame (901) and the second connecting frame (903).

4. An automatic loading and unloading device for valve stem machining according to claim 3, characterized in that: The feeding assembly includes a first drive base (2601) and a first gripper (2602); the first drive base (2601) is installed on one side of the mounting block (25), and a plurality of first grippers (2602) are provided on the first drive base (2601).

5. An automatic loading and unloading device for valve stem machining according to claim 4, characterized in that: The cleaning and material handling assembly includes a second drive base (2701), a second gripper (2702), a connecting pipe (2703), a micro high-pressure pump (2704), and an air supply pipe (2705). The second drive base (2701) is installed on the side of the mounting block (25) adjacent to the first drive base (2601). Multiple second grippers (2702) are connected to the second drive base (2701). The connecting pipe (2703) is provided on the second gripper (2702). Multiple air jet holes are opened on the second gripper (2702). The air jet holes are connected to the connecting pipe (2703) through the cavity opened inside the second gripper (2702). The micro high-pressure pump (2704) is installed on the side of the mounting block (25) opposite to the first drive base (2601). The micro high-pressure pump (2704) is connected to the connecting pipe (2703) through the air supply pipe (2705). A one-way protection component is provided in the air jet hole.

6. An automatic loading and unloading device for valve stem machining according to claim 5, characterized in that: The mounting strip (10) has two positioning mounting slots (11), and a feeding hopper (12) is aligned and hung in the positioning mounting slot (11). A hanging frame (13) is provided on the feeding hopper (12), and a collection frame (14) is connected inside the hanging frame (13). The surfaces of the first gripper (2602) and the second gripper (2702) are coated with high-temperature resistant soft polytetrafluoroethylene or silicone.

7. An automatic loading and unloading device for valve stem machining according to claim 6, characterized in that: The one-way protection assembly includes a valve body (2801), an anti-detachment plate (2802), a connecting rod (2803), a sealing plate (2804), a plug (2805), a through hole (2806), a push pin (2807), a snap ring (2808), a mating ring (2809), and an elastic sealing membrane (2810). The valve body (2801) is installed inside the air jet hole on the second gripper (2702). The anti-detachment plate (2802) is installed inside the valve body (2801). One end of the anti-detachment plate (2802) is connected to one end of the connecting rod (2803), and the other end of the connecting rod (2803) passes through the valve body (2801) housing and connects to the sealing plate (2804). A spacer is provided between the anti-detachment plate (2802) and the valve body (2801) housing. The spring and sealing plate (2804) are provided with multiple plugs (2805). The valve body (2801) is provided with through holes (2806) at positions corresponding to the plugs (2805). A snap ring (2808) is fixedly installed on the sealing plate (2804). A snap ring (2808) is fixedly connected to the valve body (2801). A mating ring (2809) is snapped onto the snap ring (2808). An elastic sealing membrane (2810) is provided in the middle of the mating ring (2809). The elastic sealing membrane (2810) is made of elastic silicone. A cross opening is provided in the middle of the elastic sealing membrane (2810). One side of the elastic sealing membrane (2810) abuts against the push post (2807). The other side of the elastic sealing membrane (2810) is concave arc-shaped.

8. An automatic loading and unloading device for valve stem machining according to claim 7, characterized in that: The height-assisted alignment component includes a hanger (2901), a bumper seat (2902), and a first laser (2903). The rotating frame (7) is fixedly connected to one end of the hanger (2901), and the other end of the hanger (2901) is provided with a bumper seat (2902). The first laser (2903) is provided on the hanger (2901). The bottom height of the bumper seat (2902) is lower than the bottom height of the mounting block (25). When the first laser (2903) is working, the laser emitted by it is at the same height as the center point of the first gripper (2602) and the second gripper (2702).

9. An automatic loading and unloading device for valve stem machining according to claim 8, characterized in that: The limiting component includes a fixed frame (3001), a self-locking stepper motor (3002), a lead screw (3003), and a stop block (3004). The fixed frame (3001) is mounted on the rotating frame (7). The self-locking stepper motor (3002) is fixedly mounted on the outside of the fixed frame (3001). The lead screw (3003) is connected to the inside of the fixed frame (3001) through a bearing. The lead screw (3003) is connected to the output end of the self-locking stepper motor (3002). The stop block (3004) is slidably connected inside the fixed frame (3001). The stop block (3004) is threadedly connected to the lead screw (3003). One side of the stop block (3004) is slidably connected to the guide rail (16). A proximity sensor is mounted on the stop block (3004). A trigger plate is provided on the side of the movable plate (18) opposite to the proximity sensor.

10. An automatic loading and unloading device for valve stem machining according to claim 9, characterized in that: The lateral auxiliary alignment component includes a connecting frame (3101) and a second laser (3102); the connecting frame (3101) is provided on one side of the block (3004), and the second laser (3102) is installed on the connecting frame (3101). When the movable plate (18) contacts the block (3004), the laser emitted by the second laser (3102) and the axis of the rotary actuator (24) are located in the same positive vertical plane perpendicular to the axis of the lead screw (3003).

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