Valve core turning device and valve core production process

Abstract

The present invention relates to the technical field of turning machine tools, and discloses a valve core turning device and a valve core production process, comprising a machine tool, wherein the machine tool is provided with a turning mechanism and a driving mechanism, wherein a driving motor and a tailstock are provided inside the machine tool, a three-jaw chuck is fixedly connected to the output shaft of the driving motor, and a cutting mechanism is provided on the driving motor, wherein the cutting mechanism comprises a cutter, a pushing assembly, and an electric push rod, wherein the cutter is used to cut a workpiece, the pushing assembly is used to drive the cutter to cut the workpiece after turning, and the electric push rod is used to adjust the cutting position of the cutter; the machine tool is also provided with a locking mechanism. The present invention realizes the effect of being able to turn and shape the stop valve core, and after turning is completed, it can also automatically cut the turned workpiece, and can also adjust the cutting position of the cutter, and can also achieve the effect of automatic top fixing.

Description

Technical Field

[0001] The invention relates to the technical field of turning machine tools, in particular to a valve core turning device and a valve core production process. Background Art

[0002] Turning machines are one of the most widely used types of machine tools in metal cutting. They achieve efficient processing of rotating parts through the coordination of workpiece rotation and tool linear motion. The valve core is the core component of the valve that achieves fluid direction control, pressure regulation or flow control through movement. Its main function is to block or open the fluid channel through precision structures (such as cones and spheres). The globe valve is one of the most widely used valve types in fluid control systems. It achieves opening and closing or flow regulation through the vertical lifting and lowering movement of the valve disc. Most of the existing globe valve cores are produced by turning machines.

[0003] Most of the existing stop valve cores are formed by turning a metal shaft. During mass production, multiple stop valve cores are turned on a longer metal shaft. After most of the existing turning machines have completed turning the stop valve core with a turning tool, the turning tool needs to be replaced with a cutting tool to cut off the turned stop valve from the metal shaft. This method results in more operating steps during mass production, which in turn affects the turning efficiency of the stop valve core. In addition, the existing machine tools need to fix the two ends of the metal shaft with a three-jaw chuck and a tailstock before turning. After completing the forming and cutting of the stop valve core, the length of the metal shaft becomes shorter, and the user needs to adjust the position of the tailstock again, so that the tailstock can tighten one end of the metal shaft again. This method results in limited convenience in using the lathe. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a valve core turning device and a valve core production process, which can realize the turning and forming of the stop valve core, and can also cut off the turned stop valve core, without the need for manual replacement of the cutter head. At the same time, it can automatically adjust the position of the tailstock, so that the tailstock can automatically fix one end of the metal shaft, etc., thereby solving the above-mentioned problems.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a valve core turning device, comprising a machine tool, wherein the machine tool is provided with a turning mechanism and a driving mechanism, wherein the driving mechanism is used to drive the turning mechanism to turn a workpiece, a driving motor and a tailstock are provided inside the machine tool, a three-jaw chuck is fixedly connected to the output shaft of the driving motor, and the three-jaw chuck and the tailstock are used to fix the workpiece;

[0006] The driving motor is provided with a cutting mechanism, which includes a cutter, a pushing assembly and an electric push rod. The cutter is used to cut the workpiece, the pushing assembly is used to drive the cutter to cut the workpiece after turning, and the electric push rod is used to adjust the cutting position of the cutter;

[0007] The machine tool is also provided with a locking mechanism, which is used to drive the tailstock to fix the workpiece;

[0008] The drive motor also includes two states of medium speed operation and full speed operation. When the drive motor is running at medium speed, the pushing assembly stops running, and at the same time the driving mechanism drives the turning mechanism to turn the workpiece. When the drive motor is running at full speed, the pushing assembly drives the cutter to cut the workpiece, and at the same time the locking mechanism drives the tailstock to fix one end of the workpiece after cutting.

[0009] Preferably, the pushing assembly includes a turntable, a bent pipe, a slide and a collection box, the collection box is fixedly connected to the bottom of the machine tool, and after the cutter cuts the workpiece, the collection box can collect the workpiece, the turntable is fixedly connected to the output shaft of the drive motor, a limiting hole is opened on the circumference of the turntable, the inner side of the limiting hole is fixedly connected to the limiting rod, the limiting rod is slidably connected to the guide plate, the outer side of the guide plate is fixedly connected to the limiting spring, and the end of the limiting spring away from the guide plate is fixedly connected to the inner wall of the limiting hole.

[0010] Preferably, the outer side of the slide is fixedly connected to a connecting spring, the end of the connecting spring away from the slide is fixedly connected to the inner wall of the machine tool, the inner side of the slide is slidably connected to a fixing rod, the outer side of the fixing rod is fixedly connected to a mounting hole, and the mounting hole is opened on the inner wall of the machine tool.

[0011] Preferably, the bent tube is fixedly connected to the inner side of the machine tool, and the inner two ends of the bent tube are respectively slidably connected with a convex rod and a push rod, the convex rod is fixedly connected to a return spring, and one end of the return spring is fixedly connected to the bent tube at one end away from the convex rod, and the push rod is fixedly connected to a push plate at one end away from the bent tube, and a rectangular hole is opened on the push plate, and the rectangular holes are distributed on the upper and lower sides of the push plate, and the inner side of the rectangular hole is fixedly connected with a cross bar, and the outer side of the cross bar is slidably connected to a mounting bracket, and the cutter is mounted on the mounting bracket, and the outer side of the mounting bracket is fixedly connected with a tension spring, and one end of the tension spring away from the mounting bracket is fixedly connected to the inner wall of the rectangular hole, and one end of the push plate is slidably connected to a guide rod, and the outer side of the guide rod is fixedly connected to an inner groove, and the inner groove is opened on the inner wall of the machine tool.

[0012] Preferably, the driving mechanism includes a slide and a base, the slide is fixedly connected to the inner side of the machine tool, one end of the slide is fixedly connected to a fixed motor, a ball screw is fixedly connected to the output shaft of the fixed motor, and the end of the ball screw away from the fixed motor is installed on the slide through a bearing seat, and baffles are also provided on both sides of the slide.

[0013] Preferably, the bottom of the base is fixedly connected to a connecting rod, the connecting rod is threadedly connected to the ball screw, the base is slidably connected to the slide, the top of the base is slidably connected to a fixed seat, the turning mechanism is installed on the fixed seat, the outer side of the base is fixedly connected to a moving motor, the output shaft of the moving motor passes through the base and is fixedly connected to a moving screw, and the fixed seat is threadedly connected to the moving screw.

[0014] Preferably, the bottom of the electric push rod is fixedly connected to a base plate, the inner side of the base plate is slidably connected to a support rod, the support rod is fixedly connected to the end of the base away from the moving motor, the support rods are distributed on both sides of the base, the outer side of the base plate is fixedly connected to a stabilizing spring, the end of the stabilizing spring away from the base plate is fixedly connected to the base, and the output shaft of the electric push rod is fixedly connected to the mounting frame.

[0015] Preferably, the locking mechanism includes a rack, which is fixedly connected to the bottom surface of the slide, a driving gear is meshed on the outer side of the rack, a rotating shaft is fixedly connected to the inner side of the driving gear, and the rotating shaft is rotatably connected to the inner wall of the machine tool, a driven gear is meshed on the outer side of the driving gear, a ratchet structure is provided on the inner side of the driven gear, a locking screw is fixedly connected to the inner side of the ratchet structure, and the end of the locking screw away from the driven gear is installed on the side of the slide away from the ball screw through a bearing seat, the outer side of the locking screw is threadedly connected to a bent rod, the bent rod is fixedly connected to the bottom surface of the tail stock, and the tail stock is slidably connected to the slide.

[0016] Preferably, the turning mechanism includes a fixed platform and a turning tool, the fixed platform is fixedly connected to the fixed seat, and the turning tool is installed on the fixed platform.

[0017] A valve core production process, using the above-mentioned valve core turning device, includes the following steps:

[0018] S1: The cutter is adjusted to the specified cutting position by the electric push rod;

[0019] S2: Fix both ends of the metal shaft blank through the three-jaw chuck and tailstock;

[0020] S3: operate the driving motor to run at medium speed, at this time the driving mechanism drives the turning mechanism to turn a single stop valve core on the metal shaft blank;

[0021] S4: After turning is completed, the drive motor is operated at full speed. At this time, the guide plate is affected by the centrifugal force to drive the slide plate to move toward the pushing assembly. The movement of the slide plate drives the rack to move toward the pushing assembly. Then the slide plate drives the pushing assembly to push the cutter toward the metal shaft blank. Then the cutter cuts the metal shaft blank, thereby separating the valve core formed by turning from the metal shaft blank.

[0022] S5: Operate the drive motor to restore the medium-speed operation state. At this time, the guide plate is reset under the restoring force of the limit spring. At this time, the slide and the rack are reset. At this time, the pushing assembly drives the cutter to reset, thereby separating it from the metal shaft blank. During the reset process of the rack, the locking screw is driven to move the tailstock again to the cut end of the metal shaft blank, and the metal shaft blank is fixed again.

[0023] Compared with the prior art, the present invention provides a valve core turning device and a valve core production process, which have the following beneficial effects:

[0024] 1. The present invention fixes both ends of the metal shaft by the three-jaw chuck and the tailstock during turning, and then drives the turning mechanism to turn the metal shaft through the driving mechanism, thereby turning one end of the metal shaft into a stop valve core. After turning is completed, the driving motor is controlled to run at full speed, and the driving motor runs at full speed to drive the pushing assembly to run. The pushing assembly drives the cutter to gradually move toward the metal shaft, and the cutter moves and contacts the connection between the stop valve core and the metal shaft. Since the metal shaft is in a rotating state at this time, the cutter gradually turns and cuts the metal shaft, and then the cutter separates the turned stop valve core from the metal shaft, thereby realizing the turning and forming of the stop valve core. After turning is completed, the turned workpiece can be automatically cut, thereby avoiding the problem that the user needs to replace the cutter to separate the stop valve core from the metal shaft after turning of the traditional stop valve core. While improving the convenience of use, it also further improves the turning efficiency of the valve core.

[0025] 2. In the present invention, when the shut-off valve core is turned and needs to be separated from the metal shaft, the position of the cutter is adjusted by driving the electric push rod. After the cutter reaches the specified position, the push assembly is operated to drive the cutter to separate the shut-off valve core from the metal shaft, thereby achieving the effect of being able to adjust the cutting position of the cutter, further improving practicality and scope of use.

[0026] 3. In the present invention, after the cutter completes the separation between the stop valve core and the metal shaft, the pushing assembly drives the cutter to return to its original position. At this time, the locking mechanism is operated as the cutter returns to its original position. The locking mechanism drives the tailstock to move horizontally. After the tailstock moves, it contacts one end of the cut metal shaft again and fixes it again, thereby achieving the effect of automatic fixing and avoiding the problem of manual operation to fix the metal shaft after turning once. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle;

[0029] Figure 3 It is a front side sectional view of the present invention;

[0030] Figure 4 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 5 is a side view of the present invention;

[0032] Figure 6 It is a schematic top cross-sectional view of a local structure of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of the structure at center A;

[0034] Figure 8 for Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0035] Figure 9 for Figure 6 A magnified schematic diagram of the structure at point C in the middle;

[0036] Figure 10 It is a left side sectional view of the present invention;

[0037] Figure 11 for Figure 10 A magnified schematic diagram of the structure at D in the middle;

[0038] Figure 12 This is a side sectional view of the driving gear.

[0039] In the figure: 1. Machine tool; 2. Turning mechanism; 3. Driving mechanism; 31. Slide; 32. Base; 33. Fixed motor; 34. Ball screw; 35. Fixed seat; 36. Moving motor; 37. Moving screw; 38. Connecting rod; 39. Baffle; 4. Driving motor; 41. Three-jaw chuck; 5. Tailstock; 6. Cutting mechanism; 61. Cutter; 62. Pushing assembly; 621. Turntable; 622. Bend pipe; 623. Limit hole; 624. Limit rod; 625. Guide plate; 626. Limit spring; 627. Slide plate; 628. Connector Spring; 629, fixing rod; 6210, protruding rod; 6211, push rod; 6212, return spring; 6213, push plate; 6214, rectangular hole; 6215, cross bar; 6216, mounting bracket; 6217, tension spring; 6218, guide rod; 6219, collection box; 63, electric push rod; 631, bottom plate; 632, support rod; 633, stabilizing spring; 7, locking mechanism; 71, rack; 72, driving gear; 73, rotating shaft; 74, driven gear; 75, locking screw; 76, bending rod; 77, ratchet structure. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] As introduced in the background technology, in order to solve the deficiencies in the prior art and to solve the above technical problems, the present application proposes a valve core turning device and a valve core production process.

[0042] Example 1: Please refer to Figures 1-12 A valve core turning device includes a machine tool 1, which is provided with a turning mechanism 2 and a driving mechanism 3. The driving mechanism 3 is used to drive the turning mechanism 2 to turn a workpiece. A driving motor 4 and a tailstock 5 are provided inside the machine tool 1. A three-jaw chuck 41 is fixedly connected to the output shaft of the driving motor 4. The three-jaw chuck 41 and the tailstock 5 are used to fix the workpiece.

[0043] The driving motor 4 is provided with a cutting mechanism 6, which includes a cutter 61, a pushing assembly 62 and an electric push rod 63. The cutter 61 is used to cut the workpiece, the pushing assembly 62 is used to drive the cutter 61 to cut the workpiece after turning, and the electric push rod 63 is used to adjust the cutting position of the cutter 61.

[0044] The machine tool 1 is also provided with a locking mechanism 7, which is used to drive the tailstock 5 to fix the workpiece;

[0045] The driving motor 4 also includes two states of medium speed operation and full speed operation. When the driving motor 4 is running at medium speed, the pushing assembly 62 stops running, and at the same time the driving mechanism 3 drives the turning mechanism 2 to turn the workpiece. When the driving motor 4 is running at full speed, the pushing assembly 62 drives the cutter 61 to cut the workpiece, and at the same time the locking mechanism 7 drives the tailstock 5 to fix one end of the workpiece after cutting.

[0046] During use, the two ends of the metal shaft are fixed by the three-jaw chuck 41 and the tailstock 5, and then the drive motor 4 is controlled to run at medium speed, and then the turning mechanism 2 is driven by the drive mechanism 3 to turn the metal shaft, so that one end of the metal shaft is turned into a stop valve core. During turning, the cutter 61 and the electric push rod 63 will move synchronously with the turning mechanism 2. After turning is completed, the cutter 61 is adjusted to the specified position by the electric push rod 63, and then the drive motor 4 is controlled to run at full speed. The drive motor 4 drives the pushing assembly 62 to run at full speed, and at the same time drives the three-jaw chuck 41 and the metal shaft to rotate at full speed. The pushing assembly 62 drives the cutter 61 to gradually move toward the drive mechanism 3. After the cutter 61 contacts the metal shaft, the cutter 61 cuts the metal shaft. As the cutter 61 gradually moves toward the drive mechanism 3, the cutter 61 can cut the metal shaft, thereby turning the stop valve core. It is separated from the metal shaft, and then the drive motor 4 is controlled to resume medium speed operation. At this time, the pushing assembly 62 drives the cutter 61 to reset. During this process, the locking mechanism 7 operates, and the locking mechanism 7 operates to drive the tailstock 5 to move toward the three-jaw chuck 41 until the tailstock 5 contacts one end of the cut metal shaft, thereby fixing one end of the metal shaft again through the tailstock 5, and then gradually turning the metal shaft into multiple stop valve cores in the same way, so that the metal shaft can be turned into a stop valve core while automatically separating the turned stop valve core from the metal shaft, thereby avoiding the problem of needing to replace the turning tool before separating the stop valve core, and the cutting position of the cutter 61 can be adjusted, further improving the scope of use, and the position of the tailstock 5 can be automatically adjusted, thereby achieving the effect of the tailstock 5 automatically fixing one end of the cut metal shaft.

[0047] Example 2: See Figures 1-12, different from the above-mentioned embodiment 1, the driving mechanism 3 includes a slide 31 and a base 32, the slide 31 is fixedly connected to the inner side of the machine tool 1, one end of the slide 31 is fixedly connected to a fixed motor 33, and a ball screw 34 is fixedly connected to the output shaft of the fixed motor 33, and the end of the ball screw 34 away from the fixed motor 33 is installed on the slide 31 through a bearing seat. Baffles 39 are also provided on both sides of the slide 31, and a connecting rod 38 is fixedly connected to the bottom of the base 32, and the connecting rod 38 is threadedly connected to the ball screw 34. The base 32 is slidably connected to the slide 31, and a fixed seat 35 is slidably connected to the top of the base 32. The turning mechanism 2 is installed on the fixed seat 35, and a moving motor 36 is fixedly connected to the outside of the base 32. The output shaft of the moving motor 36 passes through the base 32 and is fixedly connected to a moving screw 37, and the fixed seat 35 is threadedly connected to the moving screw 37. The turning mechanism 2 includes a fixed platform and a turning tool, the fixed platform is fixedly connected to the fixed seat 35, and the turning tool is installed on the fixed platform;

[0048] During turning, the driving motor 4 is controlled to operate at medium speed. The driving motor 4 drives the three-jaw chuck 41 and the metal shaft to rotate when it operates at medium speed. Then, the ball screw 34 is driven to rotate by the fixed motor 33. The rotation of the ball screw 34 drives the base 32 to move along the slide 31. The movement of the base 32 drives the fixed seat 35, the moving motor 36, the moving screw 37, and the turning mechanism 2 to move. After the turning tool on the turning mechanism 2 moves to the specified position, the moving motor 36 is used to drive the moving screw 37 to rotate. The moving screw 37 rotates and drives the fixed seat 35, the turning tool and the fixed table to move toward the metal shaft. After the turning tool moves, the metal shaft is turned, thereby realizing the turning forming of the stop valve core.

[0049] It should be noted that the installation of the turning tool and the fixed platform in the turning mechanism 2 is an existing technology and is common technical knowledge known to those skilled in the art, and will not be elaborated on here.

[0050] Example 3, see Figures 1-12, different from the above-mentioned embodiment 2, the pushing assembly 62 includes a turntable 621, a bent pipe 622, a slide 627 and a collection box 6219, the collection box 6219 is fixedly connected to the bottom of the machine tool 1, and after the cutter 61 cuts the workpiece, the collection box 6219 can collect the workpiece, the turntable 621 is fixedly connected to the output shaft of the drive motor 4, a limiting hole 623 is provided on the circumference of the turntable 621, the inner side of the limiting hole 623 is fixedly connected to the limiting rod 624, a guide plate 625 is slidably connected to the limiting rod 624, the outer side of the guide plate 625 is fixedly connected to the limiting spring 626, and the end of the limiting spring 626 away from the guide plate 625 is fixedly connected to the limiting hole 623 The inner wall of the machine tool 1, the outer side of the slide 627 is fixedly connected with a connecting spring 628, and the end of the connecting spring 628 away from the slide 627 is fixedly connected to the inner wall of the machine tool 1, the inner side of the slide 627 is slidably connected with a fixing rod 629, and the outer side of the fixing rod 629 is fixedly connected with a mounting hole, and the mounting hole is opened on the inner wall of the machine tool 1, the elbow 622 is fixedly connected to the inner side of the machine tool 1, and the inner ends of the elbow 622 are respectively slidably connected with a convex rod 6210 and a push rod 6211, and the elbow 622 is filled with hydraulic oil, and the hydraulic oil is distributed between the convex rod 6210 and the push rod 6211. A return spring 6212 is fixedly connected to the convex rod 6210, and the return spring 6212 is away from the convex rod 6210. One end is fixedly connected to the curved tube 622, and a return spring is fixedly connected to the push rod 6211. The end of the return spring away from the push rod 6211 is fixedly connected to the curved tube 622. The end of the push rod 6211 away from the curved tube 622 is fixedly connected to a push plate 6213. A rectangular hole 6214 is opened on the push plate 6213. The rectangular holes 6214 are distributed on the upper and lower sides of the push plate 6213. The inner side of the rectangular hole 6214 is fixedly connected to a cross bar 6215. The outer side of the cross bar 6215 is slidably connected to a mounting bracket 6216. The cutter 61 is mounted on the mounting bracket 6216. The outer side of the mounting bracket 6216 is fixedly connected to a tension spring 6217. The tension spring 6217 is away from the mounting bracket One end of 6216 is fixedly connected to the inner wall of the rectangular hole 6214, one end of the push plate 6213 is slidably connected to the guide rod 6218, the outer side of the guide rod 6218 is fixedly connected to the inner groove, and the inner groove is provided on the inner wall of the machine tool 1, the bottom of the electric push rod 63 is fixedly connected to the bottom plate 631, the inner side of the bottom plate 631 is slidably connected to the support rod 632, the support rod 632 is fixedly connected to the end of the base 32 away from the moving motor 36, the support rod 632 is distributed on both sides of the base 32, the outer side of the bottom plate 631 is fixedly connected to the stabilizing spring 633, the end of the stabilizing spring 633 away from the bottom plate 631 is fixedly connected to the base 32, and the output shaft of the electric push rod 63 is fixedly connected to the mounting bracket 6216;

[0051] When the driving motor 4 is running at medium speed, the turntable 621 is driven to rotate by the driving motor 4. Since the driving motor 4 is running at medium speed at this time, the outward centrifugal force on the guide plate 625 on the turntable 621 is less than the elastic force of the limit spring 626. At this time, the guide plate 625 cannot be extended. After the turning is completed, the electric push rod 63 is driven to operate. The electric push rod 63 drives the mounting bracket 6216 to move along the guide rod 6218. The movement of the mounting bracket 6216 drives the cutter 61 to move and squeezes the tension spring 6217. Then the motor 4 is driven at full speed. When the turntable 621 is running, the speed of the turntable 621 increases. At this time, the outward centrifugal force on the guide plate 625 on the turntable 621 is greater than the elastic force of the limit spring 626. At this time, the guide plate 625 is affected by the centrifugal force and is gradually thrown out of the turntable 621 along the limit rod 624. The guide plate 625 moves and squeezes the limit spring 626. At the same time, the guide plate 625 contacts the slide plate 627 after being thrown out. At this time, the guide plate 625 gradually drives the slide plate 627 to move along the fixed rod 629. The slide plate 627 moves and squeezes the connecting spring 628. Then the slide plate 627 and the elbow 62 2. The convex rod 6210 at one end contacts the convex rod 6210 and drives the convex rod 6210 to move. The convex rod 6210 moves to squeeze the return spring 6212 and transmits the pressure to the push rod 6211 through the hydraulic oil. Then the push rod 6211 is pushed out of the elbow 622 and stretches the return spring. The movement of the push rod 6211 drives the push plate 6213 to move along the guide rod 6218 toward the metal shaft. The movement of the push plate 6213 drives the cutter 61 and the electric push rod 63 to move. The electric push rod 63 moves along the support rod 632 and squeezes the stabilizing spring 633. The movement of the cutter 61 pushes the shut-off valve core and The metal shaft is separated, and then the stop valve core falls into the collection box 6219, thereby separating the stop valve core and the metal shaft after turning. After completing one turning, the control drive motor 4 is controlled to resume medium speed operation again. At this time, the outward centrifugal force exerted on the guide plate 625 is again less than the elastic force of the limit spring 626. At this time, the guide plate 625 is driven to reset by the limit spring 626. At this time, the cutter 61, the slide plate 627, the push plate 6213, and the electric push rod 63 are reset under the action of the connecting spring 628, the return spring and the stabilizing spring 633.

[0052] Example 4, see Figures 1-12, different from the above-mentioned embodiment 3, the locking mechanism 7 includes a rack 71, the rack 71 is fixedly connected to the bottom surface of the slide 627, the outer side of the rack 71 is meshed with a driving gear 72, the inner side of the driving gear 72 is fixedly connected to a rotating shaft 73, the rotating shaft 73 is rotatably connected to the inner wall of the machine tool 1, the outer side of the driving gear 72 is meshed with a driven gear 74, the inner side of the driven gear 74 is provided with a ratchet structure 77, the inner side of the ratchet structure 77 is fixedly connected to a locking screw 75, the end of the locking screw 75 away from the driven gear 74 is installed on the side of the slide 31 away from the ball screw 34 through a bearing seat, the outer side of the locking screw 75 is threadedly connected to a bent rod 76, the bent rod 76 is fixedly connected to the bottom surface of the tail stock 5, and the tail stock 5 is slidably connected to the slide 31;

[0053] When the pushing assembly 62 is operated, rack 71 follows the slide plate 627 to move, and the rack 71 moves to drive gear 72, and the driving gear 72 rotates and drives the driven gear 74 to rotate. Because the ratchet structure 77 is provided inside the driven gear 74, when the rack 71 follows the slide plate 627 to move toward the bent pipe 622, the locking screw rod 75 cannot rotate. When the pushing assembly 62 is reset, the rack 71 follows the slide plate 627 to reset. At this time, the rack drive gear 72 rotates in the opposite direction. The driving gear 72 rotates and drives the driven gear 74 to rotate. At this time, the driven gear 74 drives the ratchet structure 77 to rotate with the cooperation of the pawl on the ratchet structure. The rotation of the ratchet structure 77 drives the locking screw rod 75 to rotate. The locking screw rod 75 rotates and drives the bent rod 76 to move. The movement of the bent rod 76 drives the tail stock 5 to move in the direction of the three-jaw chuck 41. At this time, the tail stock 5 tightens and fixes one end of the metal shaft cut by the cutter 61.

[0054] A valve core production process, using the above-mentioned valve core turning device, includes the following steps:

[0055] S1: The cutter 61 is adjusted to a designated cutting position by the electric push rod 63;

[0056] S2: Fix both ends of the metal shaft blank by the three-jaw chuck 1 and the tailstock 5;

[0057] S3: operating the driving motor 4 to run at a medium speed, at which time the driving mechanism 3 drives the turning mechanism 2 to turn a single stop valve core on the metal shaft blank;

[0058] S4: After turning is completed, the drive motor 4 is operated at full speed. At this time, the guide plate 625 is affected by the centrifugal force to drive the slide 627 to move toward the pushing assembly. The movement of the slide 627 drives the rack 71 to move toward the pushing assembly 62. Then, the slide 627 drives the pushing assembly 62 to push the cutter 61 toward the metal shaft blank. Then, the cutter 61 cuts the metal shaft blank, thereby separating the valve core formed by turning from the metal shaft blank.

[0059] S5: Operate the drive motor 4 to restore the medium-speed operation state. At this time, the guide plate 625 is reset under the restoring force of the limit spring 626. At this time, the slide 627 and the rack 71 are reset. At this time, the pushing assembly 62 drives the cutter 61 to reset, thereby separating it from the metal shaft blank. During the reset process of the rack 71, the locking screw 75 is driven to move the tailstock 5 again to the cut end of the metal blank, and the metal shaft blank is fixed again.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A valve core turning device, comprising a machine tool (1), wherein the machine tool (1) is provided with a turning mechanism (2) and a driving mechanism (3), wherein the driving mechanism (3) is used to drive the turning mechanism (2) to turn a workpiece, and wherein: A drive motor (4) and a tailstock (5) are provided inside the machine tool (1); a three-jaw chuck (41) is fixedly connected to the output shaft of the drive motor (4); the three-jaw chuck (41) and the tailstock (5) are used to fix a workpiece; The driving motor (4) is provided with a cutting mechanism (6), the cutting mechanism (6) comprising a cutter (61), a pushing assembly (62) and an electric push rod (63), the cutter (61) being used to cut a workpiece, the pushing assembly (62) being used to drive the cutter (61) to cut the workpiece after turning, and the electric push rod (63) being used to adjust the cutting position of the cutter (61); The machine tool (1) is further provided with a locking mechanism (7), and the locking mechanism (7) is used to drive the tailstock (5) to fix the workpiece; The driving motor (4) further includes two states: medium speed operation and full speed operation. When the driving motor (4) is operating at medium speed, the pushing assembly (62) stops operating, and at the same time, the driving mechanism (3) drives the turning mechanism (2) to turn the workpiece. When the driving motor (4) is operating at full speed, the pushing assembly (62) drives the cutter (61) to cut the workpiece, and at the same time, the locking mechanism (7) drives the tailstock (5) to fix one end of the workpiece after cutting. The pushing assembly (62) includes a turntable (621), a curved pipe (622), a slide (627) and a collection box (6219). The collection box (6219) is fixedly connected to the bottom of the machine tool (1). After the cutter (61) cuts the workpiece, the collection box (6219) can collect the workpiece. The turntable (621) is fixedly connected to the output shaft of the drive motor (4). A limiting hole (623) is provided on the circumference of the turntable (621). A limiting rod (624) is fixedly connected to the inner side of the limiting hole (623). A guide plate (625) is slidably connected to the limiting rod (624). The outer side of the guide plate (625) is fixedly connected to a limit spring (626), and one end of the limit spring (626) away from the guide plate (625) is fixedly connected to the inner wall of the limit hole (623). The outer side of the slide plate (627) is fixedly connected to a connecting spring (628), and one end of the connecting spring (628) away from the slide plate (627) is fixedly connected to the inner wall of the machine tool (1). The inner side of the slide plate (627) is slidably connected to a fixing rod (629), and the outer side of the fixing rod (629) is fixedly connected to a mounting hole, and the mounting hole is opened on the inner wall of the machine tool (1). The bent pipe (622) is fixedly connected to the inner wall of the machine tool (1). Inside the machine tool (1), the inner ends of the curved tube (622) are slidably connected to a convex rod (6210) and a push rod (6211), respectively. The convex rod (6210) is fixedly connected to a return spring (6212). The end of the return spring (6212) away from the convex rod (6210) is fixedly connected to the curved tube (622). The end of the push rod (6211) away from the curved tube (622) is fixedly connected to a push plate (6213). The push plate (6213) is provided with a rectangular hole (6214). The rectangular holes (6214) are distributed on the upper and lower sides of the push plate (6213). A cross bar (6215) is fixedly connected to the inner side of (6214), a mounting bracket (6216) is slidably connected to the outer side of the cross bar (6215), the cutter (61) is mounted on the mounting bracket (6216), a tension spring (6217) is fixedly connected to the outer side of the mounting bracket (6216), one end of the tension spring (6217) away from the mounting bracket (6216) is fixedly connected to the inner wall of the rectangular hole (6214), one end of the push plate (6213) is slidably connected to a guide rod (6218), the outer side of the guide rod (6218) is fixedly connected to an inner groove, and the inner groove is provided on the inner wall of the machine tool (1).

2. A valve core turning device according to claim 1, characterized in that: The driving mechanism (3) includes a slide (31) and a base (32), wherein the slide (31) is fixedly connected to the inner side of the machine tool (1), one end of the slide (31) is fixedly connected to a fixed motor (33), an output shaft of the fixed motor (33) is fixedly connected to a ball screw (34), an end of the ball screw (34) away from the fixed motor (33) is mounted on the slide (31) via a bearing seat, and baffles (39) are also provided on both sides of the slide (31).

3. A valve core turning device according to claim 2, characterized in that: The bottom of the base (32) is fixedly connected to a connecting rod (38), and the connecting rod (38) is threadedly connected to the ball screw (34). The base (32) is slidably connected to the slide (31). The top of the base (32) is slidably connected to a fixed seat (35). The turning mechanism (2) is mounted on the fixed seat (35). The outer side of the base (32) is fixedly connected to a moving motor (36). The output shaft of the moving motor (36) passes through the base (32) and is fixedly connected to a moving screw (37). The fixed seat (35) is threadedly connected to the moving screw (37).

4. A valve core turning device according to claim 3, characterized in that: The bottom of the electric push rod (63) is fixedly connected to a base plate (631), the inner side of the base plate (631) is slidably connected to a support rod (632), the support rod (632) is fixedly connected to one end of the base (32) away from the moving motor (36), the support rods (632) are distributed on both sides of the base (32), the outer side of the base plate (631) is fixedly connected to a stabilizing spring (633), the end of the stabilizing spring (633) away from the base plate (631) is fixedly connected to the base (32), and the output shaft of the electric push rod (63) is fixedly connected to the mounting frame (6216).

5. The valve core turning device according to claim 4, characterized in that: The locking mechanism (7) includes a rack (71), the rack (71) is fixedly connected to the bottom surface of the slide (627), the outer side of the rack (71) is meshed with a driving gear (72), the inner side of the driving gear (72) is fixedly connected with a rotating shaft (73), the rotating shaft (73) is rotatably connected to the inner wall of the machine tool (1), the outer side of the driving gear (72) is meshed with a driven gear (74), and the inner side of the driven gear (74) is provided with a ratchet knot. The ratchet structure (77) is fixedly connected to a locking screw (75) on the inner side, and the end of the locking screw (75) away from the driven gear (74) is installed on the side of the slide (31) away from the ball screw (34) through a bearing seat, and the outer side of the locking screw (75) is threadedly connected to a bent rod (76), and the bent rod (76) is fixedly connected to the bottom surface of the tailstock (5), and the tailstock (5) is slidably connected to the slide (31).

6. The valve core turning device according to claim 5, characterized in that: The turning mechanism (2) comprises a fixed platform and a turning tool, the fixed platform is fixedly connected to the fixed seat (35), and the turning tool is mounted on the fixed platform.

7. A valve core production process, characterized by: The valve core turning device according to claim 6 is used, comprising the following steps: S1: The cutter (61) is adjusted to a designated cutting position by means of an electric push rod (63); S2: Fixing the two ends of the metal shaft blank by means of a three-jaw chuck (41) and a tailstock (5); S3: operating the driving motor (4) to run at a medium speed, at which time the driving mechanism (3) drives the turning mechanism (2) to turn a single stop valve core on the metal shaft blank; S4: After turning is completed, the drive motor (4) is operated at full speed. At this time, the guide plate (625) is affected by the centrifugal force to drive the slide plate (627) to move toward the push assembly. The movement of the slide plate (627) drives the rack (71) to move toward the push assembly (62). Then, the slide plate (627) drives the push assembly (62) to push the cutter (61) toward the metal shaft blank. Then, the cutter (61) cuts the metal shaft blank, thereby separating the valve core formed by turning from the metal shaft blank. S5: Operate the drive motor (4) to resume the medium-speed operation state. At this time, the guide plate (625) is reset under the restoring force of the limit spring (626). At this time, the slide plate (627) and the rack (71) are reset. At this time, the push assembly (62) drives the cutter (61) to reset, thereby separating from the metal shaft blank. During the reset process of the rack (71), the locking screw (75) is driven to move the tailstock (5) again to the cut end of the metal shaft blank, and the metal shaft blank is fixed again.

Images