A turning device and process for high-frequency ball valve stem

Abstract

The present application discloses a turning device and process for a high-frequency ball valve stem, which relates to the field of valve stem processing, and includes a machine body, a three-jaw chuck, a center and a turning tool holder, wherein a sliding seat is slidably provided on the machine body, and the turning tool holder is installed on the sliding seat, and an annular bracket is provided on the machine body, and three abutment wheels abutting against the valve stem are provided in the annular bracket, and the three abutment wheels are distributed in a circumferential array on the annular bracket, and an avoidance notch for avoiding the trajectory of the turning tool is provided on the annular bracket; three sliding sleeves are provided on the annular bracket, corresponding to the three abutment wheels one by one, and a sliding rod is slidably provided in the sliding sleeve, and the abutment wheel is rotatably connected to the end of the sliding rod, and the sliding rod slides adaptively in the sliding sleeve to drive the abutment wheel to always abut against the valve stem. The present application can improve the processing efficiency while ensuring the turning quality.

Description

Technical Field

[0001] The present application relates to the field of valve stem processing, and in particular to a turning device and process for a high-frequency ball valve stem. Background Art

[0002] Ball valve, the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. High-frequency ball valves are opened and closed frequently, and the valve stem plays a vital role as a transmission part.

[0003] At present, the processing of valve stems is usually carried out on a lathe, where the valve stem is fixed on a three-jaw chuck and abutted by the top, and the three-jaw chuck drives the valve stem to rotate, and the lathe tool can turn the valve stem. However, because the valve stem is often slender, that is, the support points at both ends of the valve stem are far apart, the valve stem is prone to radial movement, which affects the turning quality.

[0004] Referring to the Chinese patent with publication number CN118543863A, three sets of rolling bodies on the annular frame abut against the surface of the valve stem to increase the number of supporting points to ensure the stability of the valve stem during the turning process, thereby reducing the movement of the valve stem and improving the turning quality.

[0005] When the slide drives the tool holder to move to the end of the valve stem, due to the annular frame, there are three-jaw chucks and tips at both ends of the valve stem. When the annular frame moves to the end, there is still a distance between the tool and the end of the valve stem, and the tool cannot perform processing at this distance, that is, the turning stroke of the tool is limited and cannot pass over the annular frame. Therefore, the valve stem cannot be completely processed and secondary processing is required, which leads to a decrease in the processing efficiency of the valve stem. There is room for improvement. Summary of the invention

[0006] In order to ensure turning quality while improving machining efficiency, the present application provides a turning device and process for a high-frequency ball valve stem.

[0007] The present application provides a high-frequency ball valve stem turning device and process using the following technical solutions:

[0008] A turning device for a high-frequency ball valve stem comprises a machine body, a three-jaw chuck, a center and a turning tool holder, wherein a slide seat is slidably provided on the machine body, and the turning tool holder is mounted on the slide seat, and an annular bracket is provided on the machine body, and three abutment wheels abutting against the valve stem are provided in the annular bracket, and the three abutment wheels are distributed in a circular array on the annular bracket, and an avoidance notch for avoiding the travel trajectory of the turning tool is opened on the annular bracket; three sliding sleeves are provided on the annular bracket, corresponding to the three abutment wheels one by one, and a sliding rod is slidably provided in the sliding sleeve, and the abutment wheel is rotatably connected to the end of the sliding rod, and the sliding rod adaptively slides in the sliding sleeve to drive the abutment wheel to always abut against the valve stem.

[0009] By adopting the above technical scheme, the annular bracket is installed on the machine body, and the three abutment wheels are abutted against the valve stem to increase the support points, ensure the stability of the valve stem, reduce radial movement, and help improve the turning quality; in addition, an avoidance notch is opened on the annular bracket, and when the turning tool on the turning tool holder moves to the annular bracket, the valve stem can continue to be processed through the avoidance notch, that is, the annular bracket will not affect the travel path of the turning tool, thereby ensuring the complete processing of the lateral side of the valve stem, and no additional secondary turning is required, thereby improving the processing efficiency; the sliding rod slides adaptively in the sliding sleeve, and when the turning tool turns the valve stem at the avoidance notch, the diameter of the valve stem becomes smaller. At this time, the sliding rod slides in the sliding sleeve, driving the abutment wheel to slide outward, so that the abutment wheel is always in abutment with the surface of the valve stem to ensure support for the valve stem. If the sliding rod does not slide, when the diameter of the valve stem becomes smaller, the support of the abutment wheel to the valve stem will fail, affecting subsequent processing.

[0010] Preferably, a plurality of barbs are distributed on the inner wall of the sliding sleeve, and the distribution direction of all the barbs is consistent with the sliding direction of the sliding rod, a one-way transmission plate is arranged in the sliding sleeve, a hook plate cooperating with the barbs is arranged on the one-way transmission plate, and the one-way transmission plate is arranged around the peripheral side of the sliding rod, and two clamping plates are arranged on the inner side of the one-way transmission plate, and the two clamping plates are distributed along the sliding direction of the sliding rod, and a positioning ring plate is arranged on the peripheral side of the sliding rod, and the positioning ring plate is inserted between the two clamping plates, and an installation groove connected to the interior of the sliding sleeve is opened in the annular bracket, and an abutment spring is installed in the annular bracket located in the installation groove, and the length direction of the abutment spring is consistent with the sliding direction of the sliding rod, one end of the abutment spring is connected to the inner wall of the installation groove, and the other end of the abutment spring abuts against the end of the sliding rod.

[0011] By adopting the above technical solution, during the turning process, after the turning tool turns the valve stem at the avoidance notch, the diameter of the valve stem at this point becomes smaller. At this time, under the action of the abutment spring, the abutment wheel on the sliding rod will always abut against the surface of the valve stem. The abutment spring acts on the sliding rod. Because the sliding rod is plugged into and matched with the two clamping plates through the positioning ring plate, the sliding rod will synchronously drive the one-way transmission plate to slide, and the hook plate will slide along the distribution direction of the barbs. The hook plate can only slide toward the valve stem, that is, the one-way transmission plate can only slide in one direction toward the valve stem. When the valve stem is turned, the valve stem itself will have radial movement. If the sliding rod only relies on the abutment spring to abut on the valve stem, then when the valve stem moves, the force acts on the abutment spring, and the sliding rod will move accordingly, and the stability of the valve stem during machining cannot be guaranteed. Therefore, the one-way sliding of the sliding rod is achieved through a one-way transmission plate, which can prevent the sliding rod from sliding in the opposite direction, ensure that the abutment wheel is always in abutment with the valve stem, reduce the radial movement of the valve stem, and improve the turning quality.

[0012] Preferably, the one-way transmission plate is slidably matched with the sliding rod, and the sliding direction of the one-way transmission plate on the sliding rod is parallel to the sliding direction of the sliding seat; a shift rod is arranged on the one-way transmission plate, and the shift rod passes through a sliding sleeve.

[0013] By adopting the above technical solution, after the turning operation of the valve stem is completed, when the next valve stem is turned, the area surrounded by all the abutment wheels is smaller, and the abutment wheels cannot slide in the opposite direction, so the valve stem cannot pass through it. At this time, the one-way transmission plate is slid by pulling the lever. When the one-way transmission plate and the inner wall of the sliding sleeve abut against the limit, the hook plate and the barb are disengaged, and the one-way transmission is released. At this time, the sliding rod can slide in the direction away from the valve stem, and the sliding rod can be used to adapt to the clamping and abutment of the subsequent valve stem. When the three-jaw chuck clamps and fixes the valve stem, the one-way transmission plate is slid to make the hook plate slide to the barb, and the one-way transmission fit is formed again.

[0014] Preferably, the sliding rod and the sliding sleeve are rotatably matched, and the annular bracket is located on the side of the installation groove away from the abutment wheel and is also provided with a receiving groove, the receiving groove is connected with the installation groove, the annular bracket is located in the receiving groove and is rotatably provided with a linkage rod, a round rod portion and a square rod portion are formed on the linkage rod, the square rod portion extends into the installation groove and is plugged into and matched with the sliding rod, the round rod portion is located in the receiving groove, and a driving member for driving the linkage rod to rotate is provided on the annular bracket, and the rotation angle of the linkage rod is 0°~90°.

[0015] By adopting the above technical solution, the installation process of the valve stem is to first pass the valve stem through the annular bracket and then fix it with the three-jaw chuck. After the valve stem passes through the annular bracket, the valve stem will slide relative to the annular bracket. If the rotation axis direction of the abutment wheel is horizontal at this time, the movement direction of the valve stem is inconsistent with the rotation direction of the abutment wheel, and friction will be generated between the abutment wheel and the abutment wheel. Under the action of the abutment spring, the abutment wheel will be pressed against the surface of the valve stem, resulting in increased friction, thereby affecting the movement of the valve stem. In this application, when clamping the valve stem, the one-way transmission plate is first slid, the hook plate and the barb are disengaged, and the valve stem is unlocked. The sliding rod is transmitted unidirectionally, and the driving part drives the linkage rod to rotate 90°. At this time, the valve stem passes through the annular bracket. At this time, the rotation axis direction of the abutment wheel is tangent to the circumferential side of the valve stem, that is, the rolling direction of the abutment wheel is consistent with the movement direction of the valve stem. When the valve stem abuts against the edge of the abutment wheel, the edge of the abutment wheel can play a guiding role. During the insertion process of the valve stem, the abutment wheel will slide to adapt to the size of the valve stem. Then, when the valve stem moves among all the abutment wheels, the abutment wheel will rotate accordingly, making the movement of the valve stem smoother, and the abutment wheel can support and guide the valve stem, so that the valve stem can quickly cooperate with the three-jaw chuck.

[0016] Preferably, the driving member is configured as a driving gear, the driving gear is coaxially fixed to the round rod portion of the linkage rod, a driving rack is slidably provided on the annular bracket, and the driving rack is meshed with the driving gear.

[0017] By adopting the above technical solution, the driving rack slides, driving the driving gear to rotate, and the driving gear drives the linkage rod to rotate. The square rod part of the linkage rod will drive the sliding rod to rotate 90°, so that the abutment wheel rotates, which is convenient for clamping the valve stem.

[0018] Preferably, an annular mounting plate is slidably provided on the annular bracket, the driving rack is fixedly mounted on the annular mounting plate, a sliding plate is provided on the annular mounting plate at a position corresponding to the shift rod, a sliding groove is provided on the sliding plate, the length direction of the sliding groove is consistent with the sliding direction of the sliding rod, a sliding block is provided at the end of the shift rod away from the one-way transmission plate, the sliding block is in the shape of an "I", and the sliding block slides in cooperation with the sliding groove.

[0019] By adopting the above technical scheme, an annular mounting plate is slidably arranged on the annular bracket, and the sliding direction of the annular mounting plate is consistent with the length direction of the valve stem. Before clamping the valve stem, the staff can hold the annular mounting plate to make it slide. On the one hand, the annular mounting plate will drive the one-way transmission plate to slide through the lever to release the one-way transmission, and on the other hand, it will drive the driving gear to rotate 90° through the driving rack to adjust the angle of the abutment wheel, so that the valve stem can smoothly pass through the annular bracket and complete the clamping action; after that, the staff will slide the annular mounting plate in the opposite direction to make the one-way transmission plate slide, realize the one-way sliding of the sliding rod, and drive the driving gear to rotate and reset through the driving rack, so that the rotation axis of the abutment wheel is consistent with the length direction of the valve stem.

[0020] A high-frequency ball valve stem turning process, using the high-frequency ball valve stem turning device, comprises the following steps:

[0021] S1: The valve stem blank is passed through the annular bracket, one end of the valve stem blank is clamped and fixed by the three-jaw chuck, the other end of the valve stem blank is abutted by the top, and the three abutting wheels on the annular bracket abut against the peripheral side of the valve stem blank;

[0022] S2: Adjust the turning depth and feed amount of the turning tool holder. The three-jaw chuck drives the valve stem blank to rotate, and the slide slides, driving the turning tool to turn the valve stem blank. When the turning tool turns the valve stem at the annular bracket, the turning tool will pass through the avoidance gap of the annular bracket.

[0023] Preferably, in step S1, when clamping the valve stem blank, the sliding rod is rotated so that the abutment wheel rotates 90 degrees, so that the rotation axis of the abutment wheel is tangent to the circumference of the valve stem. When the abutment wheel is clamped, the sliding rod is reset so that the rotation axis of the abutment wheel is parallel to the length direction of the valve stem.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The three abutment wheels are used to abut against the valve stem to increase the support points, which helps to reduce the radial movement of the valve stem and ensure the turning quality of the valve stem. The annular bracket is provided with an avoidance notch. When the turning tool moves, the avoidance notch avoids the turning tool, which will not affect the turning operation of the turning tool, ensuring the complete processing of the valve stem peripheral side, and no additional secondary turning operation is required;

[0026] 2. After the turning tool turns the valve stem at the avoidance notch of the annular bracket, the diameter of the valve stem at this point becomes smaller, and the corresponding sliding rod will slide adaptively in the sliding sleeve to ensure that the abutment wheel always abuts against the surface of the valve stem, and under the cooperation of the hook plate and the barb on the one-way rotating plate, the sliding rod slides in one direction, that is, during the turning process, the abutment wheel will not slide in the direction away from the valve stem, ensuring the reliability of the abutment between the abutment wheel and the valve stem;

[0027] 3. When clamping the valve stem, drive the sliding rod to rotate 90 degrees so that the rotation axis of the abutment wheel is tangent to the circumference of the valve stem. The rim of the abutment wheel can play a guiding role. During the insertion of the valve stem, the abutment wheel will slide to adapt to the size of the valve stem. Then, when the valve stem moves among all the abutment wheels, the abutment wheel will rotate accordingly, making the movement of the valve stem smoother. The abutment wheel can support and guide the valve stem, allowing the valve stem to quickly cooperate with the three-jaw chuck. After clamping is completed, drive the sliding rod to reset so that the abutment wheel can rotate in conjunction with the abutment wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 This is a partial structural diagram of an embodiment of the present application, which mainly reflects the structure of the annular bracket;

[0030] Figure 3 This is a schematic cross-sectional structural diagram of the annular bracket in the embodiment of the present application;

[0031] Figure 4 This is a partial structural schematic diagram of an embodiment of the present application, which mainly reflects the structure of the positioning ring plate and the clamping plate;

[0032] Figure 5 This is a partial structural diagram of an embodiment of the present application, which mainly reflects the structure of the linkage rod;

[0033] Figure 6 This is an exploded schematic diagram of part of the structure of an embodiment of the present application, which mainly reflects the structure of the driving rack.

[0034] Figure numerals: 1, machine body; 11, three-jaw chuck; 12, center; 13, tool holder; 14, slide; 2, annular bracket; 21, avoidance gap; 3, abutment wheel; 4, sliding sleeve; 41, barb; 43, avoidance groove; 44, rotation groove; 5, sliding rod; 51, positioning ring plate; 6, one-way transmission plate; 61, hook plate; 62, clamping plate; 621, clamping gap; 7, mounting groove; 71, abutment spring; 8, lever; 81, sliding block; 9, accommodating groove; 91, linkage rod; 911, round rod portion; 912, square rod portion; 10, driving gear; 20, driving rack; 30, annular mounting plate; 40, sliding plate; 401, sliding groove. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The embodiment of the present application discloses a turning device for a high-frequency ball valve stem.

[0037] Reference Figure 1 and Figure 2 The turning device of the high-frequency ball valve stem includes a machine body 1, a three-jaw chuck 11, a top 12 and a turning tool holder 13. The three-jaw chuck 11 and the top 12 are installed at both ends of the machine body 1. The machine body 1 is slidably provided with a slide seat 14, and the turning tool holder 13 is installed on the slide seat 14. An annular bracket 2 is fixedly installed on the machine body 1. The curvature center of the annular bracket 2 is located on the center line of the valve stem after clamping. Three abutment wheels 3 are arranged in the annular bracket 2. The three abutment wheels 3 are distributed in a circumferential array on the annular bracket 2. The three abutment wheels 3 are used to contact the outer peripheral surface of the valve stem. Abutment, an avoidance notch 21 is opened on the annular bracket 2, and when the tool holder 13 moves, the avoidance notch 21 can avoid the travel trajectory of the tool; three sliding sleeves 4 are fixedly installed on the annular bracket 2, corresponding to the three abutment wheels 3 one by one, and a sliding rod 5 is slidingly arranged in the sliding sleeve 4, and the abutment wheel 3 is rotatably connected to the end of the sliding rod 5, wherein the sliding rod 5 adaptively slides in the sliding sleeve 4, and the distance between the adaptive abutment wheel 3 and the valve stem, when the diameter of the valve stem is reduced, the sliding rod 5 will slide, so that the abutment wheel 3 is always in abutment with the outer peripheral surface of the valve stem.

[0038] Three abutting wheels 3 are used to abut against the valve stem, increasing the support points and reducing the radial movement of the valve stem, which helps to improve the turning quality. An avoidance notch 21 is provided on the annular bracket 2. When the turning tool on the turning tool holder 13 turns to the annular bracket 2, it can pass through the avoidance notch 21 to continue machining the valve stem, that is, the annular bracket 2 will not affect the turning path of the turning tool, ensuring the complete machining of the valve stem in the length direction by the turning tool and eliminating the need for additional secondary turning, which helps to improve the machining efficiency. The sliding rod 5 adaptively slides within the sliding sleeve 4. After the turning tool turns the valve stem, the diameter of the valve stem will become smaller, and the sliding rod 5 adaptively slides to ensure that the abutting wheel 3 always abuts against the surface of the valve stem, ensuring the effective support of the valve stem.

[0039] Refer to Figure 2 、 Figure 3 and Figure 4 , a one-way drive plate 6 is arranged inside the sliding sleeve 4. The one-way drive plate 6 surrounds the circumferential side of the sliding rod 5. The one-way drive plate 6 is in a "U" shape. A hook plate 61 is fixedly installed on the side of the one-way drive plate 6. The end of the hook plate 61 has a certain toughness. A number of barbs 41 are distributed on the inner wall of the sliding sleeve 4. The distribution direction of the barbs 41 is the same as the sliding direction of the sliding rod 5. Two clamping plates 62 are installed inside the one-way drive plate 6. A clamping gap 621 is formed between the two clamping plates 62. The distribution direction of the two clamping plates 62 is parallel to the sliding direction of the sliding rod 5. A positioning ring plate 51 is integrally formed on the circumferential side of the sliding rod 5. The positioning ring plate 51 is inserted into the clamping gap 621. When the sliding rod 5 slides, it synchronously drives the one-way drive plate 6 to slide. By the cooperation of the hook plate 61 and the barbs 41, the one-way drive plate 6 and the sliding rod 5 can only slide in the direction close to the valve stem.

[0040] An installation groove 7 communicating with the inside of the sliding sleeve 4 is provided inside the annular bracket 2. An abutting spring 71 is installed in the annular bracket 2 in the installation groove 7. The length direction of the abutting spring 71 is the same as the sliding direction of the sliding rod 5. One end of the abutting spring 71 is connected to the inner wall of the installation groove 7, and the other end of the abutting spring 71 abuts against the end of the sliding rod 5.

[0041] When the diameter of the valve stem becomes smaller during turning, under the action of the abutting spring 71, the sliding rod 5 will slide, so that the abutting wheel 3 always abuts against the outer peripheral surface of the valve stem. Under the cooperation of the two clamping plates 62 and the positioning ring plate 51, the one-way drive plate 6 slides synchronously with the sliding rod 5. Under the cooperation of the hook plate 61 and the barbs 41, the one-way drive plate 6 can only make a one-way slide in the direction of the valve stem, thereby realizing the one-way slide of the valve stem. When the valve stem is being turned, if the sliding rod 5 only abuts against the valve stem under the action of the abutting spring 71, then when the valve stem moves erratically, the force on the abutting spring 71 is unstable, resulting in a decline in the support effect of the abutting wheel 3 on the valve stem. Therefore, the one-way sliding of the one-way drive plate 6 makes the support effect of the abutting wheel 3 on the valve stem on the sliding rod 5 more stable and reliable.

[0042] The one-way transmission plate 6 and the sliding rod 5 are slidably matched. With the cooperation of the two clamping plates 62 and the positioning ring plate 51, the one-way transmission plate 6 and the sliding rod 5 will slide synchronously in the radial direction of the valve stem, but the one-way transmission plate 6 can slide relative to the sliding rod 5 in the length direction of the valve stem, that is, the sliding direction of the one-way transmission plate 6 is parallel to the sliding direction of the sliding seat 14. When the one-way transmission plate 6 slides relative to the sliding rod 5, when the one-way transmission plate 6 abuts against the inner wall of the sliding sleeve 4, the hook plate 61 and the barb 41 are disengaged, and the one-way sliding is released. At this time, the positioning ring plate 51 is still between the two clamping plates 62; the one-way transmission plate 6 is also fixedly mounted with a lever 8, the lever 8 passes through the sliding sleeve 4, and the surface of the sliding sleeve 4 is provided with an avoidance groove 43 to avoid the sliding of the lever 8.

[0043] During the valve stem turning process, the diameter of the valve stem will decrease, and all the abutment wheels 3 will slide toward the valve stem. After the valve stem turning is completed and the unloading is completed, if the subsequent valve stem is to be processed, in order to adapt to the diameter of the valve stem, all the abutment wheels 3 need to slide away from the valve stem. At this time, the one-way transmission plate 6 is slid by the lever 8 to release the one-way sliding, that is, the sliding rod 5 can slide in both directions at this time to adapt to the diameter of the valve stem. When the valve stem is clamped, the one-way transmission plate 6 is slid again, so that the hook plate 61 slides to the barb 41, and a one-way sliding fit is formed again.

[0044] Reference Figure 3 and Figure 5 A rotation groove 44 is provided at one end of the sliding sleeve 4 away from the annular bracket 2, and the sliding rod 5 is plugged and slidably engaged with the rotation groove 44 to form a rotational fit. A receiving groove 9 is also provided on the side of the annular bracket 2 located at the installation groove 7 away from the abutment wheel 3, and the receiving groove 9 is communicated with the installation groove 7. The annular bracket 2 is located in the receiving groove 9 and is rotatably connected with a linkage rod 91. A round rod portion 911 and a square rod portion 912 are formed on the linkage rod 91. The round rod portion 911 is located in the receiving groove 9, and the square rod portion 912 extends into the installation groove 7, and the square rod portion 912 is plugged and slidably engaged with the sliding rod 5 to form a coaxial rotational fit. A driving member for driving the linkage rod 91 to rotate is provided on the annular bracket 2, wherein the rotation angle of the linkage rod 91 is 0°~90°.

[0045] When the valve stem is clamped, it will pass through the annular bracket 2 and then be fixed to the three-jaw chuck 11. After the valve stem passes through the annular bracket 2, it will be relatively displaced with the abutment wheel 3 on the annular bracket 2, and the abutment wheel 3 abuts against the outer peripheral surface of the valve stem. If the rotation axis direction of the abutment wheel 3 is horizontal, that is, parallel to the length direction of the valve stem, the movement of the valve stem will generate a large friction force between the abutment wheel 3 and the valve stem. Feeding speed; therefore, in the present application, when clamping the valve stem, the one-way transmission plate 6 is first slid, The one-way sliding is released, and at the same time, the driving member drives the linkage rod 91 to rotate 90°. The linkage rod 91 drives the abutment wheel 3 on the sliding rod 5 to rotate 90°, so that the rotation axis of the abutment wheel 3 is tangent to the circumference of the valve stem. Then the valve stem passes through the annular bracket 2. At this time, the abutment wheel 3 will guide the valve stem. The abutment wheel 3 can adapt to the outer diameter of the valve stem and move. When the valve stem moves, the abutment wheel 3 will rotate accordingly, and the abutment wheel 3 rolls on the surface of the valve stem, making the movement of the valve stem smoother.

[0046] Reference Figure 2 , Figure 3 and Figure 6 The driving member is provided as a driving gear 10, which is coaxially fixed on the round rod portion 911 of the linkage rod 91, and a driving rack 20 is slidably provided on the annular bracket 2, and the driving rack 20 is meshed with the driving gear 10. The driving rack 20 slides, driving the driving gear 10 to rotate, and the driving gear 10 drives the linkage rod 91 to rotate, and the square rod portion 912 of the linkage rod 91 drives the sliding rod 5 to rotate 90°, that is, the rotation of the abutting wheel 3 is realized.

[0047] An annular mounting plate 30 is slidingly provided on the annular bracket 2, and the driving rack 20 is fixedly mounted on the annular mounting plate 30. A sliding plate 40 is integrally formed on the annular mounting plate 30 corresponding to the shifting rod 8. A sliding groove 401 is provided on the sliding plate 40. The length direction of the sliding groove 401 is consistent with the sliding direction of the sliding rod 5. A sliding block 81 is integrally formed at one end of the shifting rod 8 away from the one-way transmission plate 6. The sliding block 81 is in the shape of an "I" character, and the sliding block 81 and the sliding groove 401 are slidingly matched.

[0048] The sliding direction of the annular mounting plate 30 is consistent with the length direction of the valve stem. Before clamping the valve stem, the staff can hold the annular mounting plate 30 to make it slide. On the one hand, the annular mounting plate 30 will drive the one-way transmission plate 6 to slide through the lever 8 to release the one-way transmission. On the other hand, it will drive the driving gear 10 to rotate 90° through the driving rack 20 to adjust the angle of the abutment wheel 3, so that the valve stem can smoothly pass through the annular bracket 2 and complete the clamping action; after that, the staff will slide the annular mounting plate 30 in the opposite direction to make the one-way transmission plate 6 slide, realize the one-way sliding of the sliding rod 5, and the driving rack 20 will drive the driving gear 10 to rotate and reset, so that the rotation axis of the abutment wheel 3 is consistent with the length direction of the valve stem.

[0049] The implementation principle of a turning device for a high-frequency ball valve stem in the embodiment of the present application is as follows: the staff first contacts the unidirectional sliding of the sliding rod 5 through the sliding of the annular mounting plate 30, and makes the abutting wheel 3 rotate 90°, and then the valve stem can be clamped so that the valve stem passes through the annular bracket 2. At this time, the abutting wheel 3 rolls on the surface of the valve stem. When the valve stem is clamped, the staff resets the annular mounting plate 30, and the hook plate 61 and the barb 41 of the one-way transmission plate 6 cooperate to realize the unidirectional sliding of the sliding rod 5, and at the same time, the abutting wheel 3 will rotate 90° to reset, and the abutting wheel 3 can rotate with the rotation of the valve stem; then the sliding seat 14 drives the turning tool holder 13 to slide, and the turning tool performs a turning operation on the valve stem. Due to the opening and closing of the avoidance notch 21 on the annular bracket 2, the turning tool can completely turn the valve stem in the length direction by passing through the avoidance notch 21. There is no turning blind area, and no secondary turning is required. While reducing the radial movement of the valve stem, the processing efficiency is improved.

[0050] The embodiment of the present application discloses a turning process for a high-frequency ball valve stem, using the above-mentioned turning device, comprising the following steps:

[0051] S1: The valve stem blank is passed through the annular bracket 2, one end of the valve stem blank is clamped and fixed by the three-jaw chuck 11, the other end of the valve stem blank is abutted against the top 12, and the three abutting wheels 3 on the annular bracket 2 are abutted against the peripheral side of the valve stem blank;

[0052] S2: Adjust the turning depth and feed amount of the turning tool holder 13, the three-jaw chuck 11 drives the valve stem blank to rotate, the slide seat 14 slides, and drives the turning tool to turn the valve stem blank. When the turning tool turns the valve stem at the annular bracket 2, the turning tool will pass through the avoidance notch 21 of the annular bracket 2.

[0053] In step S1, when clamping the valve stem blank, the sliding rod 5 is rotated to rotate the abutment wheel 3 90 degrees, so that the rotation axis of the abutment wheel 3 is tangent to the circumference of the valve stem. When the abutment wheel 3 is clamped, the sliding rod 5 is reset to make the rotation axis of the abutment wheel 3 parallel to the length direction of the valve stem.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A turning device for a high-frequency ball valve stem, characterized in that: The invention comprises a machine body (1), a three-jaw chuck (11), a center (12) and a tool holder (13); a slide seat (14) is slidably arranged on the machine body (1); the tool holder (13) is mounted on the slide seat (14); an annular bracket (2) is arranged on the machine body (1); three abutment wheels (3) abutting against a valve stem are arranged inside the annular bracket (2); the three abutment wheels (3) are distributed in a circumferential array on the annular bracket (2); and a guide rail for avoiding the travel of the tool is provided on the annular bracket (2). The annular bracket (2) is provided with three sliding sleeves (4) corresponding to the three abutting wheels (3) one by one, a sliding rod (5) is slidingly provided in the sliding sleeve (4), the abutting wheel (3) is rotatably connected to the end of the sliding rod (5), and the sliding rod (5) slides adaptively in the sliding sleeve (4) to drive the abutting wheel (3) to always abut against the valve stem; the inner wall of the sliding sleeve (4) is distributed with a plurality of barbs (41), and the distribution direction of all the barbs (41) is In line with the sliding direction of the sliding rod (5), a one-way transmission plate (6) is arranged inside the sliding sleeve (4), a hook plate (61) cooperating with the barb (41) is arranged on the one-way transmission plate (6), and the one-way transmission plate (6) is arranged around the sliding rod (5), two clamping plates (62) are arranged on the inner side of the one-way transmission plate (6), and the two clamping plates (62) are distributed along the sliding direction of the sliding rod (5), and a positioning ring plate (51) is arranged on the peripheral side of the sliding rod (5). The positioning ring plate (51) is inserted between the two clamping plates (62); a mounting groove (7) communicating with the interior of the sliding sleeve (4) is provided in the annular bracket (2); an abutment spring (71) is installed in the mounting groove (7) of the annular bracket (2); the length direction of the abutment spring (71) is consistent with the sliding direction of the sliding rod (5); one end of the abutment spring (71) is connected to the inner wall of the mounting groove (7), and the other end of the abutment spring (71) abuts against the end of the sliding rod (5).

2. A turning device for a high-frequency ball valve stem according to claim 1, characterized in that: The one-way transmission plate (6) is slidably matched with the sliding rod (5), and the sliding direction of the one-way transmission plate (6) on the sliding rod (5) is parallel to the sliding direction of the sliding seat (14); the one-way transmission plate (6) is provided with a shifting rod (8), and the shifting rod (8) passes through the sliding sleeve (4).

3. A turning device for a high-frequency ball valve stem according to claim 2, characterized in that: The sliding rod (5) is rotatably matched with the sliding sleeve (4); a receiving groove (9) is provided on the side of the annular bracket (2) located away from the abutting wheel (3) of the mounting groove (7); the receiving groove (9) is communicated with the mounting groove (7); the annular bracket (2) is rotatably provided with a linkage rod (91) in the receiving groove (9); a round rod portion (911) and a square rod portion (912) are formed on the linkage rod (91); the square rod portion (912) extends into the mounting groove (7) and is plugged and matched with the sliding rod (5); the round rod portion (911) is located in the receiving groove (9); a driving member for driving the linkage rod (91) to rotate is provided on the annular bracket (2); and the rotation angle of the linkage rod (91) is 0°~90°.

4. A turning device for a high-frequency ball valve stem according to claim 3, characterized in that: The driving member is configured as a driving gear (10), the driving gear (10) is coaxially fixed to the round rod portion (911) of the linkage rod (91), a driving rack (20) is slidably disposed on the annular bracket (2), and the driving rack (20) is meshed with the driving gear (10).

5. A turning device for a high-frequency ball valve stem according to claim 4, characterized in that: An annular mounting plate (30) is slidably arranged on the annular bracket (2), the driving rack (20) is fixedly mounted on the annular mounting plate (30), a sliding plate (40) is arranged on the annular mounting plate (30) at a position corresponding to the shifting rod (8), a sliding groove (401) is provided on the sliding plate (40), the length direction of the sliding groove (401) is consistent with the sliding direction of the sliding rod (5), a sliding block (81) is arranged at one end of the shifting rod (8) away from the one-way transmission plate (6), the sliding block (81) is in the shape of an "I" character, and the sliding block (81) is slidably matched with the sliding groove (401).

6. A high-frequency ball valve stem turning process, characterized in that: A turning device for a high-frequency ball valve stem according to any one of claims 1 to 5 comprises the following steps: S1: The valve stem blank is passed through the annular support (2), one end of the valve stem blank is clamped and fixed by a three-jaw chuck (11), the other end of the valve stem blank is abutted by a top (12), and the three abutting wheels (3) on the annular support (2) abut against the circumferential side of the valve stem blank; S2: Adjust the turning depth and feed rate of the turning tool holder (13), the three-jaw chuck (11) drives the valve stem blank to rotate, the slide seat (14) slides, and drives the turning tool to turn the valve stem blank. When the turning tool turns the valve stem at the annular bracket (2), the turning tool will pass through the avoidance notch (21) of the annular bracket (2).

7. The turning process of a high-frequency ball valve stem according to claim 6 is characterized in that: In step S1, when clamping the valve stem blank, the sliding rod (5) is rotated so that the abutment wheel (3) is rotated 90 degrees, so that the rotation axis of the abutment wheel (3) is tangent to the circumference of the valve stem. When the abutment wheel (3) is clamped, the sliding rod (5) is reset so that the rotation axis of the abutment wheel (3) is parallel to the length direction of the valve stem.

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