Automatic machining tool for valve rod of pressure release valve

Abstract

The invention discloses an automatic machining tool for a valve rod of a pressure release valve, and belongs to the technical field of automatic machining of valve rods. The automatic machining tool for the pressure release valve rod comprises a machining device and a to-be-machined valve rod body placed in the machining device, a fixing cylinder capable of moving around the circumference of the valve rod body is arranged outside the valve rod body, a sliding column matched with the fixing cylinder is slidably connected into the fixing cylinder, a turning head is arranged at the bottom of the sliding column, and a ball groove is correspondingly formed in the surface of the sliding column; two fixing frames are correspondingly and fixedly installed on the surface of the fixing cylinder, penetrating type sliding rods are slidably connected to the surfaces of the fixing frames, and ball heads connected with the ball grooves in a clamped mode are fixedly installed at one ends of the sliding rods. Compared with part of traditional machining equipment, the automatic machining tool for the valve rod of the pressure release valve can synchronously complete deep machining of a flow groove and chamfering machining of the edge of the flow groove, the machining equipment does not need to be replaced, the process of tedious replacement of the machining equipment is omitted, and then the machining efficiency of the machining device on a valve rod body is improved.

Description

Technical Field

[0001] This invention relates to the field of automated valve stem processing technology, and more specifically, to an automated tooling for processing the valve stem of a pressure relief valve. Background Technology

[0002] The valve stem of the pressure relief valve is the core actuator of the pressure relief valve. Its function is to push the valve disc to open quickly and release pressure when the system is over-pressured.

[0003] Chinese Patent Publication No. CN117620233A discloses an automated valve stem processing device, specifically relating to the field of automated valve stem processing technology. The device includes a slide rail and a machine tool, with an extension assembly comprising an extension cylinder. This invention utilizes a rotatable clamping assembly to clamp the valve stem to be processed. The clamping assembly contains a fixed arc-shaped plate and another movable arc-shaped plate. The space formed between the movable and fixed arc-shaped plates allows for clamping of the valve stem. Two sets of clamping seats are configured: one set is used to clamp the unprocessed valve stem, and the other set is used to clamp the valve stem that has undergone preliminary processing.

[0004] The above-mentioned technical solution utilizes a rotating assembly to remove the pre-processed semi-finished valve stem from the machine tool. Simultaneously, the rotation of the rotating disk feeds the unprocessed valve stem into the machine tool for clamping and cutting, further improving the processing efficiency of the valve stem and making it more convenient to use. However, some traditional valve stem processing devices cannot adjust the processing depth of the flow groove on the valve stem surface during processing, nor can they simultaneously chamfer the edge of the main pressure flow groove. Flow groove turning and flow groove edge chamfering are usually performed by two separate processing devices, affecting the processing efficiency of the valve stem. Furthermore, the chamfering device for the flow groove edge cannot be adjusted in advance according to the required chamfer angle, thus affecting the processing efficiency of the valve stem. Summary of the Invention

[0005] The purpose of this invention is to provide an automated machining fixture for pressure relief valve stems to solve the problems mentioned in the background art. To achieve the above objectives, the present invention provides the following technical solution: An automatic machining fixture for a pressure relief valve stem includes a machining device and a valve stem body to be machined placed inside the device. A fixed cylinder capable of rotating around the valve stem body is externally mounted on the valve stem body. A matching sliding column is slidably connected inside the fixed cylinder. A turning head is located at the bottom of the sliding column, and a ball groove is correspondingly formed on the surface of the sliding column. Two fixed brackets are fixedly mounted on the surface of the fixed cylinder, and a through-type sliding rod is slidably connected to the surface of the fixed brackets. A ball head that engages with the ball groove is fixedly mounted at one end of the sliding rod, and a slope block is fixedly mounted on the surface of the sliding rod. Through-type lifting rods are slidably connected to the bottom surfaces of both fixed brackets, with one end of the lifting rod engaging with the slope block. The other end of the lifting rod is fixedly installed with a lifting frame. Two connecting plates are fixedly installed on the surface of the lifting frame, and two fixed plates are fixedly installed on the surface of the fixed cylinder. Lifting plates are slidably connected to the surfaces of the two fixed plates. The bottom surface of the lifting plate is fixedly connected to the connecting plate. A toothed plate is fixedly installed on the top surface of the lifting plate. Two vertical frames are fixedly installed on the surfaces of the fixed plates. A missing gear that meshes with the toothed plate is rotatably connected between the two vertical frames. An arc-shaped plate is fixedly installed on the surface of the missing gear. Through-type movable rods are slidably connected to the surfaces of the two fixed plates. The top end of the movable rod contacts the arc-shaped plate, and an adjustable chamfering cutter is provided at the bottom of the movable rod.

[0006] Preferably, the chamfering tool includes two corresponding vertical plates, with two spring shafts correspondingly arranged between the two vertical plates. Each spring shaft has a cutting blade on its surface. The cutting blade is rotatably connected to the vertical plate through the spring shaft. An inclined plate is fixedly installed on the top surface of each of the two cutting blades. A slot is opened on the surface of one of the vertical plates, and a matching slide plate is slidably connected inside the slot. A connecting frame is fixedly installed on one end of the slide plate, and rollers are rotatably connected to both ends of the connecting frame, with the rollers contacting the inclined plate.

[0007] Preferably, a fixed plate is fixedly installed on the bottom surface of the movable rod, the bottom surface of the fixed plate is fixedly connected to the top surface of the vertical plate, a through threaded rod is threadedly connected to the surface of the fixed plate, a rotating seat is fixedly installed on the surface of the sliding plate, and the bottom surface of the threaded rod is rotatably connected to the rotating seat.

[0008] Preferably, the surface of the movable rod is fitted with a spring for resetting its movement. One end of the spring is fixedly connected to the surface of the fixed plate, and the other end of the spring is fixedly connected to the fixed plate. The fixed plate is elastically connected to the fixed plate through the spring.

[0009] Preferably, arc-shaped guide plates are fixedly installed on the bottom surfaces of both ends of the lifting frame, a second spring for resetting its movement is sleeved on the surface of the slide rod, a third spring is sleeved on the surface of the lifting rod, one end of the third spring is fixedly connected to the surface of the lifting frame, and the other end of the third spring is fixedly connected to the fixed frame.

[0010] Preferably, a spring four is elastically connected between the slide column and the fixed cylinder. One end of the spring four is fixedly connected to the surface of the slide column, and the other end of the spring four is fixedly connected to the fixed cylinder. A screw is fixedly installed on the top surface of the turning head. A threaded groove matching the screw is opened inside the slide column. The turning head is fixedly connected to the slide column by matching the screw and the threaded groove.

[0011] Preferably, a miniature telescopic device is provided above the fixed cylinder, and the telescopic end of the miniature telescopic device is fixedly connected to the top surface of the fixed cylinder. A rotatable gear ring is provided on the outside of the valve stem body, and the miniature telescopic device is fixedly connected to the inner wall of the gear ring. Mounting bracket one and mounting bracket two are respectively provided on both sides of the gear ring. Ring frames are fixedly installed on the inner sides of mounting bracket one and mounting bracket two respectively. Rings matching the ring frames are fixedly installed on both sides of the gear ring. The rings are rotatably connected to the ring frames. The gear ring is rotatably connected to mounting bracket one and mounting bracket two through the matching of the rings and the ring frames. A toothed wheel that meshes with the gear ring is rotatably connected inside mounting bracket two. A motor one is fixedly installed on the surface of mounting bracket two, and the output end of motor one is fixedly connected to the toothed wheel.

[0012] Preferably, a frame plate is fixedly installed on the surface of the processing device, a slide block is fixedly installed on the bottom surface of the frame plate, a matching slider is slidably connected inside the slide block, a U-shaped frame is fixedly installed on the bottom surface of the slider, and the bottom surfaces of the two ends of the U-shaped frame are fixedly connected to mounting frame one and mounting frame two, respectively.

[0013] Preferably, a lead screw is rotatably connected inside the slide block, and the lead screw is threadedly connected to the slider. A second motor is fixedly installed on one end surface of the slide block, and the output end of the second motor is fixedly connected to the lead screw.

[0014] Preferably, the surface of the processing device is provided with two movable clamping devices, and the two clamping devices fix the two ends of the valve stem body. A housing is fixedly installed on the surface of the processing device, and a controller is fixedly installed on the surface of the housing. The controller is electrically connected to the motor via wires. The controller is electrically connected to the motor via wires.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) When using this pressure relief valve stem automatic machining fixture, the turning head is manually rotated according to the depth of the groove machining. When the distance between the bottom of the turning head and the bottom of the arc-shaped guide plate is the same as the depth of the groove machining, the turning head is stopped. The motor rotates, causing the gear wheel to rotate, which in turn causes the gear ring to rotate. The gear ring also causes the micro telescopic device to rotate, which in turn causes the fixed cylinder to rotate. The rotation of the fixed cylinder causes the turning head to rotate and machine the groove on the surface of the valve stem body. During the process of the turning head rotating to machine the groove, the micro telescopic device... The compressor extends gradually, causing the turning head to rotate and process the depth of the flow groove on the surface of the valve stem body. When the edge of the main pressure flow groove needs to be chamfered, an adjustable chamfering tool is set up. The chamfering tool is adjusted in advance according to the chamfering angle, so that the chamfering tool can chamfer the edge of the main pressure flow groove. Compared with some traditional processing equipment, the processing device can simultaneously complete the depth processing of the flow groove and the chamfering of the flow groove edge without changing the processing equipment, saving the cumbersome process of changing processing equipment, thereby improving the processing efficiency of the processing device for the valve stem body.

[0016] (2) When using this pressure relief valve stem automatic processing fixture, the threaded rod is manually rotated according to the required chamfer angle of the main pressure flow groove edge. The threaded rod rotates into the fixed plate, causing the slide plate to move downward inside the groove. The downward movement of the slide plate causes the connecting frame to move downward, and the movement of the connecting frame causes the two rollers to move downward. The movement of the rollers squeezes the two inclined plates. After being squeezed, the inclined plates rotate, causing the cutting blade to rotate. The rotation of the cutting blade causes the spring shaft to rotate, thereby adjusting the chamfer angle of the cutting blade. This not only increases the practicality and functionality of the processing device, but also further improves the processing efficiency of the valve stem body.

[0017] (3) When this pressure relief valve stem automatic processing fixture is in use, according to the position of the flow groove on the surface of the valve stem body, the second motor rotates and drives the lead screw to rotate, which in turn causes the slider to move inside the slide seat and drives the U-shaped frame to move. The movement of the U-shaped frame causes the first mounting frame and the second mounting frame to move, which in turn causes the turning head to move to the position of the flow groove to be processed. The micro telescopic device extends and drives the fixed cylinder to move towards the metal rod. In addition, the first motor rotates and drives the gear wheel to rotate, which causes the gear wheel to rotate and drives the gear ring to rotate. The rotation of the gear ring causes the ring to rotate inside the ring frame. The rotation of the gear ring also drives the micro telescopic device to rotate. The rotation of the micro telescopic device drives the fixed cylinder to rotate. The rotation of the fixed cylinder causes the turning head to rotate and process the flow groove on the surface of the valve stem body, thereby realizing the automatic processing of the valve stem body by the processing device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the position structure of the frame plate and slide block of the present invention; Figure 3This is a schematic diagram of the position structure of the slide block and slider of the present invention; Figure 4 This is a schematic diagram of the mounting bracket 2 and the position structure of the gear wheel according to the present invention; Figure 5 This is a schematic diagram showing the separation of the ring frame and the circular ring in this invention; Figure 6 This is a schematic diagram of the positional structure of the gear ring and the annulus of the present invention; Figure 7 This is a schematic diagram of the position and structure of the miniature telescopic device and the fixed cylinder of the present invention; Figure 8 This is a schematic diagram of the position structure of the fixed cylinder and sliding column of the present invention; Figure 9 This is a schematic diagram showing the separation of the fixed cylinder and the sliding column in this invention; Figure 10 This is a schematic diagram of the position structure of the connecting plate and the lifting plate of the present invention; Figure 11 This is a schematic diagram of the position structure of the arc-shaped plate and the movable rod of the present invention; Figure 12 This is a schematic diagram showing the position and structure of the movable rod and fixed plate of the present invention; Figure 13 This is a schematic diagram of the position structure of the cutting blade and the inclined plate of the present invention.

[0019] The labels in the diagram are as follows: 1. Machining device; 2. Valve stem body; 3. Fixed cylinder; 4. Sliding column; 5. Turning head; 6. Ball groove; 7. Fixed frame; 8. Sliding rod; 9. Ball head; 10. Sloping block; 11. Lifting rod; 12. Lifting frame; 13. Fixed plate; 14. Connecting plate; 15. Lifting plate; 16. Vertical frame; 17. Gear missing; 18. Gear plate; 19. Arc plate; 20. Movable rod; 21. Chamfering tool; 22. Vertical plate; 23. Spring shaft; 24. Cutting tool; 25. Inclined plate; 26. Slide plate; 27. Connecting frame; 28. Roller; 29. Threaded rod; 30. Rotary seat; 31. Slotted; 32. Fixed plate; 33. Spring 1; 34. Arc-shaped guide plate; 35. Spring 2; 36. Spring 3; 37. Spring 4; 38. Screw-in screw; 39. Miniature telescopic device; 40. Gear ring; 41. Mounting bracket 1; 42. Mounting bracket 2; 43. Ring frame; 44. Circular ring; 45. Gear wheel; 46. Motor 1; 47. Frame plate; 48. Slide seat; 49. Slider; 50. U-shaped frame; 51. Lead screw; 52. Motor 2; 53. Clamping device; 54. Housing; 55. Controller. Detailed Implementation

[0020] Please see Figure 1 - Figure 13An automatic machining fixture for a pressure relief valve stem includes a machining device 1 and a valve stem body 2 to be machined placed inside it. The machining device 1 is used to perform groove machining and chamfering on the valve stem body 2. A fixed cylinder 3 that can move around its circumference is provided on the outside of the valve stem body 2. A matching sliding column 4 is slidably connected inside the fixed cylinder 3. During the groove machining process, the sliding column 4 is locked in the fixed cylinder 3 by a ball head 9 and a ball groove 6. A turning head 5 is provided at the bottom of the sliding column 4. The turning head 5 is a conventional turning head 5 in the prior art. A ball groove 6 is correspondingly opened on the surface of the sliding column 4. Two fixed brackets 7 are fixedly installed on the surface of the fixed cylinder 3. A through-type sliding rod 8 is slidably connected to the surface of the fixed brackets 7. One end of the sliding rod 8 is fixedly installed with a part that engages with the ball groove 6. The ball head 9 and the ball groove 6 are engaged and disengaged to lock and move the sliding column 4. A slope block 10 is fixedly installed on the surface of the sliding rod 8. The slope block 10 facilitates the unlocking of the sliding column 4. A through-type lifting rod 11 is slidably connected to the bottom surface of both fixed frames 7. One end of the lifting rod 11 contacts the slope block 10, and a lifting frame 12 is fixedly installed on the other end of the lifting rod 11. Two connecting plates 14 are fixedly installed on the surface of the lifting frame 12. Two fixed plates 13 are fixedly installed on the surface of the fixed cylinder 3. A lifting plate 15 is slidably connected to the surface of both fixed plates 13. The bottom surface of the lifting plate 15 is fixedly connected to the connecting plate 14. A toothed plate 18 is fixedly installed on the top surface of the lifting plate 15. A toothed plate 18 is fixedly installed on the surface of the fixed plate 13. Two vertical supports 16 are rotatably connected to each other, with a missing gear 17 meshing with a toothed plate 18. An arc-shaped plate 19 is fixedly mounted on the surface of the missing gear 17. A through-type movable rod 20 is slidably connected to the surfaces of two fixed plates 13. The movable rod 20 is used to guide the movement of the chamfering tool 21. The top of the movable rod 20 contacts the arc-shaped plate 19, and an adjustable chamfering tool 21 is set at the bottom of the movable rod 20. According to the depth of the groove processing, the turning head 5 is manually rotated. When the distance between the bottom of the turning head 5 and the bottom of the arc-shaped guide plate 34 is the same as the depth of the groove processing, the movement of the turning head 5 is stopped. The motor 46 rotates, driving the gear wheel 45 to rotate, which in turn drives the gear ring 40 to rotate. The rotation of the gear ring 40 also drives a micro-telescopic movement. The micro telescoping device 39 rotates, causing the fixed cylinder 3 to rotate as well. The rotation of the fixed cylinder 3, in turn, causes the turning head 5 to rotate, machining the flow grooves on the surface of the valve stem body 2. During the machining process, the micro telescoping device 39 gradually extends, allowing the turning head 5 to progressively deepen the flow grooves on the valve stem body 2. When a chamfer is required at the edge of the main pressure flow groove, an adjustable chamfering tool 21 is used. This tool is adjusted in advance according to the chamfer angle, allowing it to chamfer the edge of the main pressure flow groove. Compared to some traditional machining equipment, the machining device 1 can simultaneously complete the depth machining of the flow groove and the chamfering of its edge without requiring equipment replacement, thus eliminating the cumbersome process of changing machining equipment.This improves the processing efficiency of the processing device 1 on the valve stem body 2. Based on the required chamfer angle at the edge of the main pressure flow channel, the threaded rod 29 is manually rotated, causing it to screw into the fixed plate 32. This causes the slide plate 26 to move downwards inside the slot 31. The downward movement of the slide plate 26 pulls the connecting frame 27 downwards, which in turn pulls the two rollers 28 downwards. The rollers 28 press against the two inclined plates 25, causing them to rotate and rotate, which in turn rotates the cutting blade 24. The rotation of the cutting blade 24 then rotates the spring shaft 23, thus adjusting the chamfer angle of the cutting blade 24. This not only increases the practicality and functionality of the processing device 1 but also further improves its processing efficiency on the valve stem body 2.

[0021] Please see Figure 11 - Figure 13 The chamfering tool 21 includes two corresponding vertical plates 22, and two spring shafts 23 are correspondingly arranged between the two vertical plates 22. The spring shafts 23 are conventional spring shafts in the prior art. The spring shafts 23 are used for the movement and reset of the cutting blades 24. Each spring shaft 23 is provided with a cutting blade 24. The cutting blade 24 is a device for chamfering the edge of the flow channel in the prior art. The cutting blades 24 are rotatably connected to the vertical plates 22 through the spring shafts 23. The top surfaces of the two cutting blades 24 are fixedly mounted with inclined plates 25. The design of the inclined plates 25 is such that when the rollers 28 press the inclined plates 25, the cutting blades 24 are adjusted. The surface of one of the vertical plates 22 has a slot 31. The slot 31 is slidably connected to a matching slide plate 26. A connecting frame 27 is fixedly installed on one end surface of the slide plate 26. Rollers 28 are rotatably connected to both ends of the connecting frame 27, and the rollers 28 are in contact with the inclined plates 25. The setting of the rollers 28 reduces the wear on the inclined plates 25 and extends the service life of the inclined plates 25.

[0022] Please see Figure 11 - Figure 13 A fixed plate 32 is fixedly installed on the bottom surface of the movable rod 20. The bottom surface of the fixed plate 32 is fixedly connected to the top surface of the vertical plate 22. A through threaded rod 29 is threadedly connected to the surface of the fixed plate 32. A rotating seat 30 is fixedly installed on the surface of the slide plate 26. The bottom surface of the threaded rod 29 is rotatably connected to the rotating seat 30. The threaded rod 29 has a self-locking function. When the angle of the cutting blade 24 is adjusted to adapt to the chamfer angle of the edge of the main pressure flow channel, the cutting blade 24 is locked.

[0023] The surface of the movable rod 20 is fitted with a spring 33 for resetting its movement. One end of the spring 33 is fixedly connected to the surface of the fixed plate 32, and the other end of the spring 33 is fixedly connected to the fixed plate 13. The fixed plate 32 is elastically connected to the fixed plate 13 through the spring 33. The spring 33 is used for resetting the movement of the fixed plate 32.

[0024] Please see Figure 8- Figure 10 Arc-shaped guide plates 34 are fixedly installed on the bottom surfaces of both ends of the lifting frame 12. The arc-shaped design of the arc-shaped guide plates 34 makes the rotation of the arc-shaped guide plates 34 around the surface of the valve stem body 2 more stable. A second spring 35 for resetting its movement is sleeved on the surface of the slide rod 8. A third spring 36 is sleeved on the surface of the lifting rod 11. One end of the third spring 36 is fixedly connected to the surface of the lifting frame 12, and the other end of the third spring 36 is fixedly connected to the fixed frame 7.

[0025] A spring 37 is elastically connected between the slide column 4 and the fixed cylinder 3. One end of the spring 37 is fixedly connected to the surface of the slide column 4, and the other end of the spring 37 is fixedly connected to the fixed cylinder 3. A screw 38 is fixedly installed on the top surface of the turning head 5. The slide column 4 has a threaded groove that matches the screw 38. The turning head 5 is fixedly connected to the slide column 4 by matching the screw 38 with the threaded groove.

[0026] Please see Figure 2 - Figure 7A miniature telescopic device 39 is provided above the fixed cylinder 3. The miniature telescopic device 39 is a conventional electrically controlled push rod in the prior art, and it is electrically connected to the controller 55 via a wire. The telescopic end of the miniature telescopic device 39 is fixedly connected to the top surface of the fixed cylinder 3. A rotatable gear ring 40 is provided on the outside of the valve stem body 2. The miniature telescopic device 39 is fixedly connected to the inner wall of the gear ring 40. Mounting bracket 1 41 and mounting bracket 2 42 are respectively provided on both sides of the gear ring 40. Ring frame 43 is fixedly installed on the inner side of mounting bracket 1 41 and mounting bracket 2 42. Circular rings 44 that match the ring frame 43 are fixedly installed on both sides of the gear ring 40. The circular rings 44 are rotatably connected to the ring frame 43. The gear ring 40 is rotatably connected to mounting bracket 1 41 and mounting bracket 2 42 through the mutual matching of the circular rings 44 and the ring frame 43. A gear wheel 45 that meshes with the gear ring 40 is rotatably connected inside the mounting bracket 2 42. A motor 1 46 is fixedly installed on the surface of the mounting bracket 2 42. Motor 46 is a conventional electric motor in the prior art. The output end of motor 46 is fixedly connected to gear 45. According to the position of the flow groove on the surface of valve stem body 2, motor 52 rotates, causing lead screw 51 to rotate, which in turn causes slider 49 to move inside slide 48, causing U-shaped frame 50 to move. The movement of U-shaped frame 50 causes mounting bracket 41 and mounting bracket 42 to move, which in turn causes turning head 5 to move to the flow groove position to be processed. Miniature telescopic device 39 extends, causing fixed cylinder 3 to move towards the metal rod. In addition, the rotation of motor 46 causes gear 45 to rotate, which in turn causes gear ring 40 to rotate. The rotation of gear ring 40 causes ring 44 to rotate inside ring frame 43. The rotation of gear ring 40 also causes miniature telescopic device 39 to rotate, which in turn causes fixed cylinder 3 to rotate. The rotation of fixed cylinder 3 causes turning head 5 to rotate to process the flow groove on the surface of valve stem body 2, thereby realizing the automated processing of valve stem body 2 by processing device 1.

[0027] Please see Figure 1 - Figure 5 A frame plate 47 is fixedly installed on the surface of the processing device 1. A slide block 48 is fixedly installed on the bottom surface of the frame plate 47. A matching slider 49 is slidably connected inside the slide block 48. A U-shaped frame 50 is fixedly installed on the bottom surface of the slider 49. The bottom surfaces of the two ends of the U-shaped frame 50 are fixedly connected to the mounting frame 1 41 and the mounting frame 2 42, respectively.

[0028] Please see Figure 1 - Figure 5 The slide block 48 is internally connected to a lead screw 51, which is threadedly connected to the slider 49. A second motor 52 is fixedly mounted on one end surface of the slide block 48. The second motor 52 is a conventional forward and reverse reversing motor in the prior art, and the output end of the second motor 52 is fixedly connected to the lead screw 51.

[0029] The surface of the processing device 1 is provided with two movable clamping devices 53, and the two clamping devices 53 fix the two ends of the valve stem body 2. The surface of the processing device 1 is fixedly mounted with a housing 54, and the surface of the housing 54 is fixedly mounted with a controller 55. The controller 55 is a conventional programmable control device in the prior art. The controller 55 controls the operation of the second motor 52, the first motor 46 and the miniature telescopic device 39, which is the prior art and will not be described in detail here. The controller 55 is electrically connected to the second motor 52 through wires and to the first motor 46 through wires.

[0030] The steps of using this invention are as follows: When using this automatic valve stem machining fixture for pressure relief valves, during the machining process of the valve stem body 2, the metal rod to be machined is first placed inside the gear ring 40. Then, the two clamping devices 53 move towards each other to adapt to the length of the metal rod. The clamping devices 53 then clamp both ends of the metal rod, at which point the metal rod is located at the center of the gear ring 40. Based on the position of the flow groove on the surface of the valve stem body 2, the controller 55 is operated. The controller 55 controls the second motor 52 to rotate. The rotation of the second motor 52 causes the lead screw 51 to rotate, which in turn causes the slider 49 to move inside the slide block 48, moving the U-shaped frame 50. The movement of the U-shaped frame 50 causes the first mounting bracket 41 and the second mounting bracket 42 to move, thereby moving the turning head 5 to the position of the flow groove to be machined. The motor 52 is stopped, and the miniature telescopic device 39 extends, moving the fixed cylinder 3 towards the metal rod. Based on the depth of the groove processing, the turning head 5 is manually rotated. The rotation of the turning head 5 causes the screw 38 to rotate, thus changing the relative position of the turning head 5 and the sliding column 4. When the distance between the bottom of the turning head 5 and the bottom of the arc-shaped guide plate 34 is the same as the depth of the groove processing, the movement of the turning head 5 is stopped, and the controller 55 is operated. The controller 55 controls the rotation of the motor 46, which in turn rotates the geared wheel 45, causing the geared wheel 45 to rotate, which in turn rotates the gear ring 40. The gear ring 40 rotates, causing the circular ring 44 to rotate inside the ring frame 43. The rotation of the gear ring 40 also causes the miniature telescopic device 39 to rotate. The fixed cylinder 3 rotates, which in turn causes the turning head 5 to rotate and process the flow groove on the surface of the valve stem body 2. During the process of the turning head 5 rotating to process the flow groove, the micro telescopic device 39 gradually extends, which in turn causes the turning head 5 to rotate and gradually process the depth of the flow groove on the surface of the valve stem body 2. When processing the main pressure flow groove on the surface of the valve stem body 2, before the gear ring 40 rotates, the threaded rod 29 is manually rotated according to the chamfer angle that needs to be processed at the edge of the main pressure flow groove. After the threaded rod 29 is screwed into the fixed plate 32, the slide plate 26 moves downward inside the slot 31. The downward movement of the slide plate 26 causes the connecting frame 27 to move downward, and the movement of the connecting frame 27 causes the two rollers 28 to move downward. The movement of the rollers 28 presses the two inclined plates 25, and the inclined plates 25 are subjected to After extrusion, the cutting blade 24 rotates, which in turn rotates the spring shaft 23. When the cutting blade 24 rotates to the chamfered angle of the main pressure channel edge, the threaded rod 29 stops rotating. The main pressure channel depth is processed by rotating the turning head 5 through the above steps. After the main pressure channel depth is processed, the bottom of the arc-shaped guide plate 34 contacts the surface of the valve stem body 2. When the edge of the main pressure channel is chamfered, as the micro telescopic device 39 continues to extend, the arc-shaped guide plate 34 is squeezed by the surface of the valve stem body 2 and moves towards the fixed cylinder 3. The movement of the arc-shaped guide plate 34 moves the lifting frame 12, which in turn causes the lifting rod 11 to move and squeeze the slope block 10. At this time, the spring 36 is compressed.After being compressed, the slope block 10 moves the slide rod 8 outwards towards the fixed frame 7, stretching the spring 35. The slide rod 8 moves, causing the ball head 9 to disengage from the ball groove 6. At this point, the locked slide column 4 is released. As the micro telescopic device 39 continues to extend, the turning head 5 is compressed by the main pressure flow channel and moves inwards towards the fixed cylinder 3. The turning head 5 no longer processes the main pressure flow channel. During the movement of the lifting frame 12, the lifting plate 15 also moves towards the missing gear 17. The movement of the lifting plate 15 causes the toothed plate 18 to move upwards. Because the missing gear 17 meshes with the toothed plate 18, the missing gear 17 rotates, causing the arc plate 19 to rotate and compress the movable rod 20. After being compressed, the movable rod 20 moves towards the main pressure flow channel. The movement of the movable rod 20 causes the fixed plate 32 to move. The tension spring 33 and the movable rod 20 move the adjusted chamfering tool 21 towards the edge of the main pressure channel. As the micro telescoping device 39 continues to extend, and the chamfering tool 21 rotates with the gear ring 40, the chamfering tool 21 is used to chamfer the edge of the main pressure channel. Depending on the depth of the channel machining, the turning head 5 is manually rotated. When the distance between the bottom of the turning head 5 and the bottom of the arc-shaped guide plate 34 is the same as the depth of the channel machining, the turning head 5 stops moving. The motor 46 rotates, causing the gear wheel 45 to rotate, which in turn rotates the gear ring 40. The rotation of the gear ring 40 also rotates the micro telescoping device 39, which in turn rotates the fixed cylinder 3. The rotation of the fixed cylinder 3, in turn, causes the turning head 5 to rotate. The turning head 5 rotates to process the flow grooves on the surface of the valve stem body 2. During this process, the micro-expansion joint 39 gradually extends, allowing the turning head 5 to gradually process the depth of the flow grooves on the valve stem body 2. When a chamfer needs to be machined at the edge of the main pressure flow groove, an adjustable chamfering tool 21 is set up. The chamfering tool 21 is adjusted in advance according to the chamfer angle, allowing it to chamfer the edge of the main pressure flow groove. Compared to some traditional processing equipment, the processing device 1 can simultaneously complete the depth processing of the flow groove and the chamfering of the flow groove edge without changing processing equipment, eliminating the cumbersome process of changing processing equipment and thus improving the processing efficiency of the processing device 1 on the valve stem body 2. The turning head 5 is manually rotated according to the chamfer angle required for the edge of the main pressure flow groove. The threaded rod 29 screws into the fixed plate 32, causing the slide plate 26 to move downwards inside the slot 31. This downward movement of the slide plate 26 drives the connecting frame 27 downwards, which in turn drives the two rollers 28 downwards. The rollers 28 press against the two inclined plates 25, causing them to rotate and rotate the cutting blade 24. This rotation of the cutting blade 24, in turn, drives the spring shaft 23, allowing adjustment of the cutting blade 24's angle. This not only increases the practicality and functionality of the processing device 1 but also further improves the processing efficiency of the valve stem body 2. Based on the position of the flow groove on the surface of the valve stem body 2, the motor 52 rotates, causing the lead screw 51 to rotate, which in turn causes the slider 49 to move inside the slide block 48, moving the U-shaped frame 50.The movement of the U-shaped frame 50 moves the mounting brackets 41 and 42, thereby moving the turning head 5 to the position of the flow groove to be machined. The miniature telescopic device 39 extends, moving the fixed cylinder 3 towards the metal rod. Simultaneously, the rotation of the motor 46 drives the geared wheel 45, which in turn drives the gear ring 40. The gear ring 40, in turn, causes the ring 44 to rotate inside the ring frame 43. The rotation of the gear ring 40 also drives the miniature telescopic device 39, which in turn drives the fixed cylinder 3. The rotation of the fixed cylinder 3, in turn, causes the turning head 5 to rotate, machining the flow groove on the surface of the valve stem body 2. This achieves automated machining of the valve stem body 2 by the machining device 1.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic machining fixture for a pressure relief valve stem, comprising a machining device (1) and a valve stem body (2) to be machined placed inside therein, characterized in that: The valve stem body (2) is provided with a fixed cylinder (3) that can move around its circumference. The fixed cylinder (3) is slidably connected to a matching sliding column (4). The bottom of the sliding column (4) is provided with a turning head (5). The surface of the sliding column (4) is provided with a ball groove (6). The surface of the fixed cylinder (3) is fixedly installed with two fixed brackets (7). The surface of the fixed brackets (7) is slidably connected with a through-type sliding rod (8). One end of the sliding rod (8) is fixedly installed with a ball head (9) that engages with the ball groove (6). The surface of the sliding rod (8) is fixedly installed with a slope block (10). The bottom surfaces of the two fixed brackets (7) are slidably connected with through-type lifting rods (11). One end of the lifting rod (11) contacts the slope block (10). The other end of the lifting rod (11) is fixedly installed with a lifting frame (12). Two connecting plates (14) are fixedly installed on the surface of the fixed cylinder (3). Two fixed plates (13) are fixedly installed on the surface of the fixed cylinder (3). A lifting plate (15) is slidably connected to the surface of the two fixed plates (13). The bottom surface of the lifting plate (15) is fixedly connected to the connecting plate (14). A toothed plate (18) is fixedly installed on the top surface of the lifting plate (15). Two vertical frames (16) are fixedly installed on the surface of the fixed plate (13). A missing gear (17) that meshes with the toothed plate (18) is rotatably connected between the two vertical frames (16). An arc plate (19) is fixedly installed on the surface of the missing gear (17). A through-type movable rod (20) is slidably connected to the surface of the two fixed plates (13). The top end of the movable rod (20) contacts the arc plate (19). An adjustable chamfering cutter (21) is provided at the bottom of the movable rod (20).

2. The automatic machining fixture for the pressure relief valve stem according to claim 1, characterized in that: The chamfering tool (21) includes two corresponding vertical plates (22), and two spring shafts (23) are arranged between the two vertical plates (22). A cutting blade (24) is provided on the surface of any one of the spring shafts (23). The cutting blade (24) is rotatably connected to the vertical plate (22) through the spring shaft (23). An inclined plate (25) is fixedly installed on the top surface of the two cutting blades (24). A slot (31) is opened on the surface of one of the vertical plates (22). A matching slide plate (26) is slidably connected inside the slot (31). A connecting frame (27) is fixedly installed on one end surface of the slide plate (26). Rollers (28) are rotatably connected to both ends of the connecting frame (27), and the rollers (28) are in contact with the inclined plate (25).

3. The automatic machining fixture for the pressure relief valve stem according to claim 2, characterized in that: A fixed plate (32) is fixedly installed on the bottom surface of the movable rod (20). The bottom surface of the fixed plate (32) is fixedly connected to the top surface of the vertical plate (22). A through threaded rod (29) is threadedly connected to the surface of the fixed plate (32). A rotating seat (30) is fixedly installed on the surface of the sliding plate (26). The bottom surface of the threaded rod (29) is rotatably connected to the rotating seat (30).

4. The automatic machining fixture for the pressure relief valve stem according to claim 3, characterized in that: The surface of the movable rod (20) is fitted with a spring (33) for resetting its movement. One end of the spring (33) is fixedly connected to the surface of the fixed plate (32), and the other end of the spring (33) is fixedly connected to the fixed plate (13). The fixed plate (32) is elastically connected to the fixed plate (13) through the spring (33).

5. The automatic machining fixture for the pressure relief valve stem according to claim 1, characterized in that: Arc-shaped guide plates (34) are fixedly installed on the bottom surfaces of both ends of the lifting frame (12). Spring 2 (35) for resetting the movement is sleeved on the surface of the slide rod (8). Spring 3 (36) is sleeved on the surface of the lifting rod (11). One end of spring 3 (36) is fixedly connected to the surface of the lifting frame (12), and the other end of spring 3 (36) is fixedly connected to the fixed frame (7).

6. The automatic machining fixture for the pressure relief valve stem according to claim 1, characterized in that: A spring four (37) is elastically connected between the slide column (4) and the fixed cylinder (3). One end of the spring four (37) is fixedly connected to the surface of the slide column (4), and the other end of the spring four (37) is fixedly connected to the fixed cylinder (3). A screw (38) is fixedly installed on the top surface of the turning head (5). A threaded groove matching the screw (38) is opened inside the slide column (4). The turning head (5) is fixedly connected to the slide column (4) by matching the screw (38) and the threaded groove.

7. The automatic machining fixture for the pressure relief valve stem according to claim 6, characterized in that: A miniature telescopic device (39) is provided above the fixed cylinder (3). The telescopic end of the miniature telescopic device (39) is fixedly connected to the top surface of the fixed cylinder (3). A rotatable gear ring (40) is provided on the outside of the valve stem body (2). The miniature telescopic device (39) is fixedly connected to the inner wall of the gear ring (40). Mounting bracket one (41) and mounting bracket two (42) are provided on both sides of the gear ring (40). Ring frames (43) are fixedly installed on the inner sides of mounting bracket one (41) and mounting bracket two (42). All surfaces are fixedly mounted with a ring (44) that matches the ring frame (43). The ring (44) is rotatably connected to the ring frame (43). The gear ring (40) is rotatably connected to the mounting frame one (41) and the mounting frame two (42) through the matching of the ring (44) and the ring frame (43). The inside of the mounting frame two (42) is rotatably connected with a gear wheel (45) that meshes with the gear ring (40). The surface of the mounting frame two (42) is fixedly mounted with a motor one (46). The output end of the motor one (46) is fixedly connected to the gear wheel (45).

8. The automatic machining fixture for the pressure relief valve stem according to claim 1, characterized in that: A frame plate (47) is fixedly installed on the surface of the processing device (1). A slide block (48) is fixedly installed on the bottom surface of the frame plate (47). A matching slider (49) is slidably connected inside the slide block (48). A U-shaped frame (50) is fixedly installed on the bottom surface of the slider (49). The bottom surfaces of the two ends of the U-shaped frame (50) are fixedly connected to the first mounting frame (41) and the second mounting frame (42) respectively.

9. The automatic machining fixture for the pressure relief valve stem according to claim 8, characterized in that: The slide (48) is internally connected to a lead screw (51), which is threadedly connected to the slider (49). A motor (52) is fixedly mounted on one end of the slide (48), and the output end of the motor (52) is fixedly connected to the lead screw (51).

10. The automatic machining fixture for the pressure relief valve stem according to claim 8, characterized in that: The surface of the processing device (1) is provided with two movable clamping devices (53), and the two clamping devices (53) fix the two ends of the valve stem body (2). The surface of the processing device (1) is fixedly installed with a housing (54), and the surface of the housing (54) is fixedly installed with a controller (55). The controller (55) is electrically connected to the second motor (52) through a wire, and the controller (55) is electrically connected to the first motor (46) through a wire.

Images