A kind of regulating valve body machining turning tool

Abstract

The present invention relates to the technical field of regulating valves, and specifically to a regulating valve body processing turning tool, comprising a clamping mechanism, a supporting mechanism and a turning mechanism, wherein the supporting mechanism is installed on the surface of a machine tool body, the turning mechanism is arranged at the lower end of the supporting mechanism, and the clamping mechanism is installed at the upper end of the supporting mechanism. The present invention gradually brings the two ends of a steel strip closer together through a clamping assembly, thereby controlling the surrounding area of ​​the steel strip. Under the action of the steel strip, the displacements of four claw columns change synchronously. When the surrounding area of ​​the steel strip becomes larger, the clamping claws loosen, and the metal blank is aligned. When the surrounding area of ​​the steel strip becomes smaller, the four clamping claws are gradually held tightly by the steel strip, and the four clamping claws complete the fixed clamping of the metal blank. The present invention can automatically adjust the support position and angle when the workpiece is turned over by the claw column, and evenly distribute the load at the same time. The clamping claws can adapt to workpieces of different sizes and shapes, and ensure that they are always firmly clamped during the turning and processing process.

Description

Technical Field

[0001] The invention relates to the technical field of regulating valves, in particular to a tool for machining and turning over a regulating valve body. Background Art

[0002] Casting and cutting are the two most common metal processing methods for valve bodies. Casting is the process of pouring molten metal into a mold and waiting for it to cool and solidify to form a valve body of the desired shape. The advantage of casting is that it can produce valve bodies with complex shapes, especially those with complex inner cavities, at a relatively low cost. However, the surface quality of cast valve bodies is not as good as that of cut parts, and their mechanical properties may also be slightly inferior. In addition, defects such as pores and slag inclusions may occur during the casting process, affecting the overall quality of the valve body. Cutting is the use of tools to remove excess material from the valve body, and the desired shape, size and surface quality are obtained through precise machining and trimming, which can meet the requirements of high precision and high quality. Cutting can obtain better surface roughness and flatness, which is beneficial to improving the sealing performance and corrosion resistance of the valve body.

[0003] In the process of oil and gas transportation, it is necessary to merge the fluids from different pipelines together to complete subsequent processing or transportation. The T-type three-way ball valve has a unique three-way structure that can connect three pipelines at the same time to achieve fluid diversion, confluence or flow direction switching. This multi-flow control function is essential to ensure that the fluid flows along the predetermined route. However, the T-type three-way ball valve needs to operate under harsh working conditions such as high pressure and high temperature inside the oil and gas pipeline, requiring higher surface quality and corrosion resistance. It is more appropriate to process this valve body by cutting. Cutting technology is most commonly used in metal cold processing, which is divided into turning, drilling, milling, grinding, boring, planing and other processing methods. The selected metal material is processed into a rough shape of the blank, and the blank is then processed by machine tools.

[0004] Before clamping the workpiece, the workpiece is first adjusted and positioned to ensure that the center line of the workpiece coincides with the center line of the machine tool spindle. Then the blank is milled to remove excess material and initially form the outline of the T-type valve body. The flange connection end of the valve body is then machined by turning. The workpiece is mounted on the lathe, and the excess material is removed by the rotation and feed movement of the turning tool to achieve the required size and shape. During the metal cold processing process, the four-jaw chuck needs to be used continuously for fixed clamping. When the clamping surface of one of the jaws is processed, the jaw needs to give way. However, due to the special three-way structure of the T-type valve body, the clamping force distribution of the remaining three jaws will change. Especially during the processing process, the workpiece needs to be frequently flipped. The clamping force is not enough to balance the processing force and deadweight of the workpiece. The remaining jaws cannot firmly clamp the workpiece. The unstable clamping of the workpiece will cause vibration marks, ripples or increased roughness on the machined surface, and the quality of the machined surface will decrease. It cannot be used in the high-intensity environment of oil and gas pipelines.

[0005] Therefore, a tool for turning over the valve body of a regulating valve is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a regulating valve body processing turning tool, which controls the size of the surrounding area of ​​the steel strip through the clamping assembly, and the displacement of the four claw columns changes synchronously, so that the surrounding area is expanded and the metal blank is aligned, and the surrounding area is reduced, and the metal blank is clamped by the four clamping claws to complete the fixed clamping.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A regulating valve body processing turning tool comprises a clamping mechanism, a supporting mechanism and a turning mechanism, wherein the supporting mechanism is installed on the surface of a machine tool body, the turning mechanism is arranged at the lower end of the supporting mechanism, the clamping mechanism is installed at the upper end of the supporting mechanism, the clamping mechanism comprises a base, a claw groove and a clamp, the base is arranged on the upper surface of the supporting mechanism, the claw groove is opened on the upper surface of the base, the clamp is located inside the base, the clamp comprises a clamping assembly, a steel belt, a claw column, a clamping claw, a pad and a position control handle block, the pad is located at the bottom end inside the base, the position control handle block is arranged on the upper surface of the pad, four claw columns are respectively located on four end surfaces of the pad and the position control handle block, the steel belt is sleeved on the outer surfaces of the four claw columns, the clamping assembly is installed on the lower surface of the pad, the clamping claw is arranged at the upper end of the claw column, the size of the surrounding area of ​​the steel belt is controlled by the clamping assembly, the displacement of the four claw columns changes synchronously, the surrounding area is expanded, the metal blank is aligned, the surrounding area is reduced, the metal blank is clamped by the four clamping claws, and the fixed clamping is completed.

[0009] From the above scheme, it can be seen that the three functions of clamping, supporting and flipping are integrated into one, which improves the processing efficiency. Through the design of the clamping mechanism, the metal blank can be clamped quickly and stably, ensuring accurate positioning during the processing process and avoiding processing errors caused by the movement of the blank. The clamping assembly in the clamping mechanism controls the size of the surrounding area of ​​the steel belt to achieve synchronous adjustment of the displacement of the four claw columns, which not only simplifies the operation process, but also improves the flexibility and adaptability of clamping. Whether expanding or reducing the surrounding area, it can easily clamp metal blanks of different sizes, greatly enhancing the versatility of the tooling.

[0010] Preferably, the clamping assembly includes an active rotating disk, a protrusion, a traction wall rod, a movable shaft, a traction column and a U-shaped movable handle block, the active rotating disk is mounted on the bottom surface of the pad, the two protrusions are respectively mounted on the two side surfaces of the active rotating disk, the two traction wall rods are respectively arranged on the two side ends of the active rotating disk, the middle end of the traction wall rod is provided with a protrusion, the two protrusions are positioned opposite to each other, the movable shaft is arranged on the surface of the protrusion, the traction wall rod is connected to the pad through the movable shaft, the tip surface of the protrusion is limitedly connected to the inner surface of one end of the traction wall rod, the traction column is mounted on the other end of the traction wall rod, the U-shaped movable handle block is arranged on the top of the traction column, and the two ends of the steel belt are respectively connected to the U-shaped movable handle block.

[0011] From the above scheme, it can be seen that the active turntable is connected to the motor, which can drive the convex block to rotate, and then through the interaction between the limit connector and the traction wall rod, the traction wall rod can automatically adjust its swing angle according to the rotation angle of the active turntable, and through the connection between the traction column and the U-shaped movable handle block and the steel belt, the precise control of the synchronous approach or distance of the two ends of the steel belt is realized. This control method can ensure that the four clamping claws remain synchronized and stable when clamping the metal blank, avoiding processing errors or blank damage caused by uneven clamping.

[0012] Preferably, a tooth surface ring is provided at the middle end of the claw column, the tooth surface ring is position-limitedly connected to the surface of the claw column, and the tooth surface ring is connected to the inner surface of the steel belt.

[0013] It can be seen from the above scheme that by setting a tooth surface ring at the middle end of the claw column and connecting it with the inner surface of the steel belt, the flexibility of the steel belt when sliding is improved. Whenever the steel belt clamps the claw column, the steel belt can slide smoothly on the surface of the claw column. Thanks to the connection between the steel belt and the tooth surface ring and the limit transfer between the tooth surface ring and the claw column, the resistance in the clamping process is reduced, so that the steel belt can respond to the instructions of the clamping component more quickly, thereby shortening the clamping time, and helping to evenly control the force of the steel belt on the four claw columns. Due to the presence of the tooth surface ring, the steel belt can distribute the force more evenly when sliding, avoiding unstable clamping or damage to the blank caused by uneven force. This uniform control method not only improves the processing quality, but also extends the service life of the tooling, and effectively reduces the wear between the steel belt and the claw column. In the traditional clamping mechanism, the direct contact between the steel belt and the claw column often causes severe wear and shortens the service life of the tooling. The present invention reduces the direct contact between the steel belt and the claw column by introducing the tooth surface ring as an intermediary, thereby reducing the degree of wear and extending the service life of the tooling.

[0014] Preferably, the control handle block is composed of four independent fixed plates, and the four fixed plates are respectively located at the four corners of the pad, and a matching slide groove is arranged between every two fixed plates. A cross plate is arranged at the bottom end of the claw column, and the cross plate matches the matching slide groove. A matching groove is provided on the bottom surface of the cross plate, and a circular groove is provided on the inner end surface of the cross plate, and the circular groove is connected with the matching groove.

[0015] From the above scheme, it can be seen that the precise control of the displacement of the claw column is achieved through the design of the position control handle block. The position control handle block is composed of four independent fixed plates, and a matching slide is set between every two fixed plates. The cross plate at the bottom of the claw column matches the matching slide. When the claw column is subjected to the force of the steel belt, it can only be displaced inside the matching slide, thereby ensuring that the direction of the clamping force is always aligned with the center position set by the machine tool, effectively avoiding damage to the blank or processing errors caused by the deviation of the clamping force direction. Due to the matching design of the cross plate and the matching slide, the claw column can easily slide inside the matching slide when the position needs to be adjusted.

[0016] Preferably, a connecting handle rod is installed on one side surface of the claw column, and a limiting arc groove is provided on the other side surface of the claw column. An arc-shaped movable clamp block is movably provided on the surface of the limiting arc groove, and a limiting long groove is provided on the surface of the connecting handle rod. The connecting handle rod is connected to the adjacent arc-shaped movable clamp block through the limiting long groove.

[0017] It can be seen from the above scheme that: through the design of the connecting handle rod, the mutual traction between the claw columns is realized. Even if one of the clamping claws gives way, the four claw columns can still be pulled together through the connecting handle rod, and the traction force still exists, complementing each other. One end of the connecting handle rod is a fixed end, and the other end is a movable end, and the arc-shaped movable clamping block slides along the limiting arc groove. The movable end of the connecting handle rod can always move along the cross-section position of the corresponding claw column, and the formed frame will not detach. When the size or shape of the metal blank changes, the connecting handle rod and the arc-shaped movable clamping block can automatically adjust their position so that the area of ​​the frame area matches the metal blank. This adaptive adjustment method not only improves the flexibility of processing, but also reduces the difficulty of operation and time cost.

[0018] Preferably, the four side end faces of the pad are provided with L-shaped connecting blocks, one end of the L-shaped connecting block is provided with a limiting cross column, the limiting cross column is located in the matching slide groove, the matching groove matches the L-shaped connecting block, and the limiting cross column matches the circular groove.

[0019] It can be seen from the above scheme that: through the design of the L-shaped connecting block and the limiting cross column, the present invention realizes a stable connection between the claw column and the pad, and allows the claw column to move to a certain extent in the matching slide groove. It not only ensures the stability of the claw column, but also gives it a certain flexibility, so that the claw column can gradually move inward along the matching slide groove when it is subjected to the force of the steel belt. When one of the clamping claws gives way, the frame formed by the four claw columns and the four connecting handles gradually presents a triangular structure. The formation of this triangular structure makes the remaining three clamping claws more stable under the triangular force, thereby effectively offsetting the adverse effects caused by one clamping claw giving way. This implementation method enhances the adaptability and versatility of the tooling. Since the claw column can be displaced in the matching slide groove and form a stable triangular structure, this enables the tooling to adapt to workpieces of different sizes and shapes. No matter how the size or shape of the workpiece changes, the clamping claw can fit the surface of the workpiece tightly and provide a stable clamping force.

[0020] Preferably, a sliding rod is provided on the inner side of the arc-shaped movable clamping block, and the arc-shaped movable clamping block is connected to the limiting long groove through the sliding rod.

[0021] It can be seen from the above scheme that: through the design of the sliding rod and the limiting long groove, a flexible connection between the arc-shaped movable clamp and the connecting handle rod is achieved, thereby adapting to the displacement change of the claw column. When the claw column is displaced by the force of the steel belt, the sliding rod can slide in the limiting long groove, ensuring the relative position relationship between the connecting handle rod and the claw column, making the overall structure more stable. When the claw column needs to give way, due to the restriction of the sliding rod on the connecting handle rod, the connecting handle rod will lose its freedom, thereby maintaining the stability of the overall structure. When the claw column moves outward along the matching slide groove, the connecting handle rod will regain its freedom, allowing the overall structure to adapt to the new displacement state. This design not only ensures the stability of the claw column when it gives way, but also ensures its flexibility when it returns to its original position.

[0022] Preferably, the four limiting transverse columns are spaced at equal intervals, and the interval between two opposing limiting transverse columns is greater than the width of the transverse plate, and smaller than the length of the transverse plate.

[0023] It can be seen from the above scheme that by designing the spacing of the limiting horizontal columns, the effective displacement of the claw column in the matching slide groove is achieved. The spacing between the two opposing limiting horizontal columns is greater than the width of the horizontal plate, but less than the length of the horizontal plate, so that when the claw column is subjected to the force of the steel belt, the horizontal plate can smoothly pass between the two limiting horizontal columns, while ensuring the effective docking between the horizontal plate and the limiting horizontal column, which not only improves the flexibility of the claw column displacement, but also enhances the stability of the overall structure. This implementation method effectively increases the displacement length of a single claw column. Since the spacing of the limiting horizontal columns is reasonably set, when the horizontal plate passes through the limiting horizontal column, its round through groove can dock with the limiting horizontal column in the relative position, thereby achieving a larger range of displacement of the claw column. This design enables the claw column to adjust its position more flexibly when forming a triangular frame, thereby improving the stability and adaptability of the triangular frame.

[0024] Preferably, a rotating column is provided at the top of the claw column, a clamping claw is installed at the top of the rotating column, a swinging groove is provided on the surface of the rotating column, a swinging cylinder is installed inside the swinging groove, the rotating column is connected to the clamping claw through the swinging cylinder, and the clamping claw matches the claw groove.

[0025] It can be seen from the above scheme that the flexible swing of the clamping claw is achieved through the design of the swing cylinder. When the corresponding clamping surface is processed, the clamping claw can be gradually swung back to its original position through the swing cylinder. This design enables the clamping claw to adapt to the shape changes of the workpiece and fit the workpiece surface more closely, thereby improving the stability and accuracy of clamping. The slot design in the implementation method increases the friction between the clamping claw and the workpiece. The side surface of the clamping claw is evenly provided with slots. This design enables the clamping claw to generate greater friction when it fits the workpiece, thereby enhancing the clamping force of the clamping claw on the workpiece and avoiding the workpiece from sliding or displacing during the processing process.

[0026] Preferably, a rotating shaft is provided at the central ends of the claw column and the rotating column, and the rotating column is rotatably connected to the top end of the claw column via the rotating shaft.

[0027] It can be seen from the above scheme that: through the design of the rotating shaft, a flexible rotation connection between the rotating column and the claw column is realized, so that the clamping claw can swing freely around the rotating shaft, so as to adapt to the shape change of the workpiece and better fit the surface of the workpiece. Compared with the fixed clamping method in the prior art, the clamping claw of the present invention has higher mobility and adaptability, and can better meet the clamping requirements of workpieces of different shapes and sizes. This embodiment makes full use of the mobility of the clamping claw and the force of the claw column. During the clamping process, the claw column applies a certain force to the clamping claw, so that the slot surface of the clamping claw can automatically fit the surface of the workpiece. This automatic fitting method not only improves the stability and accuracy of clamping, but also avoids the errors and inconveniences caused by manual adjustment.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A regulating valve body processing turning tool can clamp and adapt irregularly shaped metal blanks through the combination of a clamping assembly and a claw column structure. During the processing, when the clamping surface of a clamping claw needs to be processed, the clamping claw gives way to the processing tool, while the other clamping claws maintain a firm clamping of the workpiece to ensure stability and precision during the processing. Through the frame structure formed by four claw columns and a connecting handle rod, when a clamping claw needs to give way for processing, the other three claw columns and the connecting handle rod will automatically adjust to form a triangular structure, effectively resisting external interference, keeping the position of the workpiece stable during the processing, thereby improving the processing quality and precision, and avoiding the problem of vibration marks, ripples or increased roughness on the processing surface caused by unstable clamping of the workpiece.

[0030] 2. A tooling for turning over the valve body of a regulating valve. The claw column can automatically adjust the support position and angle when the workpiece is turned over, and evenly distribute the load to avoid deformation of the workpiece or unstable clamping caused by single-point force, and prevent the workpiece from deviating from the predetermined position due to inertia or external force during the turning process. The clamping claws can adapt to workpieces of different sizes and shapes, and ensure that they are always firmly clamped during the turning and processing process. By adjusting the opening and closing degree of the clamping claws and the size of the clamping force, it can adapt to the dynamic changes in the workpiece shape, enhance the stability of the processing process, reduce processing errors, improve production efficiency and reduce production costs. There is no need to frequently stop to adjust or reposition the workpiece. The stable processing process also helps to reduce scrap rate and rework rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2It is a schematic diagram of the structure of the tooling of the present invention in a flipped state;

[0033] Figure 3 It is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0034] Figure 4 It is a schematic diagram of the clamp structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the clamping assembly of the present invention;

[0036] Figure 6 It is a schematic diagram of the claw column structure of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the pad of the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the connecting handle rod of the present invention;

[0039] Fig. 9 It is a schematic diagram of the rotating shaft structure of the present invention;

[0040] Fig.10 It is a schematic diagram of the limiting horizontal column structure of the present invention.

[0041] In the figure: 1, clamping mechanism; 11, base; 12, claw groove; 13, clamp; 131, clamping assembly; 1311, active turntable; 1312, bump; 1313, traction wall rod; 1314, movable shaft; 1315, traction small column; 1316, U-shaped movable handle block; 132, steel belt; 133, claw column; 1331, tooth surface ring; 1332, cross plate; 1333, matching slot; 1334, round slot ; 1335, connecting handle rod; 1336, limiting long groove; 1337, arc-shaped movable clamping block; 1338, limiting arc-shaped groove; 1339, rotating shaft; 134, rotating column; 135, swinging groove; 136, swinging cylinder; 137, clamping claw; 138, pad; 1381, limiting horizontal column; 1382, L-shaped connecting block; 139, control handle block; 1391, matching slide groove; 2, supporting mechanism; 3, flipping mechanism. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 10The present invention provides a regulating valve body processing turning tool, and the technical solution is as follows:

[0044] A regulating valve body machining flipping tool, comprising a clamping mechanism 1, a supporting mechanism 2 and a flipping mechanism 3, wherein the supporting mechanism 2 is mounted on the surface of a machine tool body, the flipping mechanism 3 is arranged at the lower end of the supporting mechanism 2, the clamping mechanism 1 is mounted on the upper end of the supporting mechanism 2, the clamping mechanism 1 comprises a base 11, a claw groove 12 and a clamp 13, the base 11 is arranged on the upper surface of the supporting mechanism 2, the claw groove 12 is opened on the upper surface of the base 11, the clamp 13 is located inside the base 11, the clamp 13 comprises a clamping assembly 131, a steel belt 132, a claw column 133, a clamping claw 137, a pad 138 and a control handle block 139, the The pad 138 is located at the bottom end inside the base 11, the control handle block 139 is arranged on the upper surface of the pad 138, the four claw columns 133 are respectively located on the four end surfaces of the pad 138 and the control handle block 139, the steel belt 132 is sleeved on the outer surface of the four claw columns 133, the clamping assembly 131 is installed on the lower surface of the pad 138, and the clamping claw 137 is arranged at the upper end of the claw column 133. The size of the surrounding area of ​​the steel belt 132 is controlled by the clamping assembly 131, and the displacement of the four claw columns 133 changes synchronously to expand the surrounding area, so that the metal blank is aligned, and the surrounding area is reduced, and the metal blank is clamped by the four clamping claws 137 to complete the fixed clamping.

[0045] As an embodiment of the present invention, refer to Figure 1-Figure 5 The clamping assembly 131 includes a driving turntable 1311, a protrusion 1312, a traction wall rod 1313, a movable shaft 1314, a traction column 1315 and a U-shaped movable handle block 1316. The driving turntable 1311 is installed on the bottom surface of the pad 138. The center end of the driving turntable 1311 is externally connected to the output end of the motor. The two protrusions 1312 are respectively installed on the two side surfaces of the driving turntable 1311. The two traction wall rods 1313 are respectively arranged at the two side ends of the driving turntable 1311. A protrusion is provided at the middle end, and the two protrusions are positioned opposite to each other. The movable shaft 1314 is provided on the surface of the protrusion. The traction wall rod 1313 is connected to the pad 138 through the movable shaft 1314. The tip surface of the protrusion 1312 is limitedly connected to the inner surface of one end of the traction wall rod 1313. The traction column 1315 is installed at the other end of the traction wall rod 1313. The U-shaped movable handle block 1316 is provided at the top of the traction column 1315, and the two ends of the steel belt 132 are respectively connected to the U-shaped movable handle block 1316.

[0046] In this embodiment, a limiting connection piece is movably provided on the tip surface of the protrusion 1312, and the protrusion 1312 is limitedly connected to the inner surface of one end of the traction wall rod 1313 through the limiting connection piece, so that the traction wall rod 1313 automatically adjusts its own swing angle through the rotation angle of the active turntable 1311. The larger the swing angle, the smaller the swing angle of the corresponding end of the traction wall rod 1313 becomes, and the smaller the swing angle, the larger the swing angle of the corresponding end of the traction wall rod 1313 becomes. The two traction columns 1315 are controlled to gradually approach each other, and the two ends of the steel belt 132 are synchronously approached, so as to control the surrounding area of ​​the steel belt 132, and the four clamping claws 137 are controlled by the steel belt 132 at the same time.

[0047] As an embodiment of the present invention, refer to Figure 5 and Figure 6 A tooth surface ring 1331 is provided at the middle end of the claw column 133 , and the tooth surface ring 1331 is limitedly connected to the surface of the claw column 133 , and the tooth surface ring 1331 is connected to the inner surface of the steel belt 132 .

[0048] In this embodiment, whenever the steel belt 132 clamps the claw column 133, the steel belt 132 will slide on the surface of the claw column 133, and the connection between the steel belt 132 and the tooth surface ring 1331 and the limiting transition between the tooth surface ring 1331 and the claw column 133 are utilized to improve the flexibility of the steel belt 132 when sliding, which helps to evenly control the force of the steel belt 132 on the four claw columns 133, promote uniform clamping, shorten the clamping time, and effectively reduce the wear between the steel belt 132 and the claw column 133.

[0049] As an embodiment of the present invention, refer to Figure 6 and Figure 7 The control handle block 139 is composed of four independent fixed plates, and the four fixed plates are respectively located at the four corner ends of the pad 138. A matching slide groove 1391 is arranged between every two fixed plates. A cross plate 1332 is arranged at the bottom end of the claw column 133, and the cross plate 1332 matches the matching slide groove 1391. A matching groove 1333 is provided on the bottom surface of the cross plate 1332, and a circular groove 1334 is provided on the inner end surface of the cross plate 1332, and the circular groove 1334 is connected with the matching groove 1333.

[0050] In this embodiment, whenever the claw column 133 is subjected to the force of the steel belt 132, the cross plate 1332 can only be displaced inside the matching slide groove 1391, so that the direction of the clamping force is aligned with the center position set by the machine tool, and subsequent displacement adjustment is convenient.

[0051] As an embodiment of the present invention, refer to Figure 8A connecting handle 1335 is installed on one side surface of the claw column 133, and a limiting arc groove 1338 is provided on the other side surface of the claw column 133. An arc-shaped movable clamp 1337 is movably provided on the surface of the limiting arc groove 1338. A limiting long groove 1336 is provided on the surface of the connecting handle 1335, and the connecting handle 1335 is connected to the adjacent arc-shaped movable clamp 1337 through the limiting long groove 1336.

[0052] In this embodiment, even if one of the clamping claws 137 gives way, the four claw columns 133 are still pulled together through the connecting handle 1335, and the traction force still exists, complementing each other. One end of the connecting handle 1335 is a fixed end, and the other end of the connecting handle 1335 is a movable end. Since the arc-shaped movable clamp block 1337 slides along the limiting arc groove 1338, the movable end of the connecting handle 1335 always moves along the cross-sectional position of the corresponding claw column 133, and the formed frame will not detach, and the area of ​​the frame area can be automatically adjusted according to the displacement change.

[0053] As an embodiment of the present invention, refer to Fig.10 The four side end faces of the pad 138 are provided with L-shaped connecting blocks 1382, and one end of the L-shaped connecting block 1382 is provided with a limiting horizontal column 1381. The limiting horizontal column 1381 is located in the matching slide groove 1391, the matching slot 1333 matches the L-shaped connecting block 1382, and the limiting horizontal column 1381 matches the round through groove 1334.

[0054] In this embodiment, when a clamping claw 137 gives way, the steel belt 132 continues to apply force to the claw column 133. Under the force, the claw column 133 gradually moves inward along the corresponding matching slide groove 1391. The frame formed by the four claw columns 133 and the four connecting handles 1335 gradually presents a triangular structure. Even if one clamping claw 137 gives way, the remaining three clamping claws 137 become more stable under the triangular force, which will not affect the clamping force of the workpiece.

[0055] As an embodiment of the present invention, refer to Figure 8 A sliding rod is provided on the inner side of the arc-shaped movable clamping block 1337, and the arc-shaped movable clamping block 1337 is connected to the limiting long groove 1336 through the sliding rod.

[0056] In this embodiment, the claw column 133 that gives way is only subjected to a force from the steel belt 132. Due to the restriction of the sliding rod on the connecting handle rod 1335, the connecting handle rod 1335 loses its freedom. When the claw column 133 moves outward along the matching slide groove 1391, the connecting handle rod 1335 regains its freedom. When giving way, the triangular structure is stable. When the clamping claw 137 returns to its original position, the frame formed by the connecting handle rod 1335 and the claw column 133 can regain its flexibility.

[0057] As an embodiment of the present invention, refer to Fig. 9 The four limiting cross columns 1381 are spaced at equal intervals, and the interval between two opposing limiting cross columns 1381 is greater than the width of the cross plate 1332 and is smaller than the length of the cross plate 1332 .

[0058] In this embodiment, when the claw column 133 that gives way is gradually affected by the force of the steel belt 132, the claw column 133 continuously moves inward along the matching slide groove 1391. Since the distance between the two limiting cross columns 1381 is the width of the cross plate 1332, and the distance is smaller than the length of the cross plate 1332, the cross plate 1332 can smoothly pass between the two limiting cross columns 1381, and the circular groove 1334 of the cross plate 1332 can be docked with the limiting cross column 1381 in the relative position, thereby increasing the displacement length of a single claw column 133 and promoting the formation of a triangular frame.

[0059] As an embodiment of the present invention, refer to Figure 4 A rotating column 134 is provided at the top of the claw column 133, and a clamping claw 137 is installed at the top of the rotating column 134. A swinging groove 135 is provided on the surface of the rotating column 134, and a swinging cylinder 136 is installed inside the swinging groove 135. The rotating column 134 is connected to the clamping claw 137 through the swinging cylinder 136. The clamping claw 137 matches the claw groove 12, and the side surface of the clamping claw 137 is evenly provided with gap grooves to increase the contact friction.

[0060] In this embodiment, after the corresponding clamping surface is processed, the clamping claw 137 is gradually swung back to its original position by the swing cylinder 136. As the slot surface of the clamping claw 137 gradually fits the workpiece, the claw column 133 moves outward to the lower end of the clamping claw 137, and the claw column 133 returns to its original position, restoring the state in which the four clamping claws 137 are tightly holding the workpiece, and re-clamping the workpiece in a new shape.

[0061] As an embodiment of the present invention, refer to Fig. 9 A rotating shaft 1339 is provided at the central ends of the claw column 133 and the rotating column 134 , and the rotating column 134 is rotatably connected to the top end of the claw column 133 through the rotating shaft 1339 .

[0062] In this embodiment, by utilizing the mobility of the clamping claw 137 and the force of the claw column 133 , the slot surface of the clamping claw 137 can automatically fit onto the surface of the workpiece.

[0063] Working principle: The two ends of the steel belt 132 are gradually brought closer together through the clamping assembly 131 to control the area of ​​the surrounding area of ​​the steel belt 132. Under the action of the steel belt 132, the displacements of the four claw columns 133 change synchronously. When the surrounding area of ​​the steel belt 132 becomes larger, the clamping claws 137 loosen and the metal blank is aligned. When the surrounding area of ​​the steel belt 132 becomes smaller, the four clamping claws 137 are gradually tightened by the steel belt 132, and the four clamping claws 137 complete the fixed clamping of the metal blank.

[0064] Specifically: before clamping the workpiece, the workpiece is first preliminarily adjusted and positioned, the metal blank is placed on the inner side of the four clamping claws 137, the active turntable 1311 rotates, the protrusion 1312 gradually squeezes the inner side of one end of the traction wall rod 1313 outward, the traction wall rod 1313 rotates outward with the movable shaft 1314 as the axis, the angle at the other end of the traction wall rod 1313 becomes smaller, the two U-shaped movable handle blocks 1316 gradually approach each other, the steel belt 132 applies force to the four claw columns 133 on the inner side, the displacement area of ​​the cross plate 1332 is limited in the matching slide groove 1391, the four cross plates 1332 all slide inward along the corresponding matching slide groove 1391, the steel belt 132 holds the four claw columns 133 tightly, and the four clamping claws 137 fix and clamp the metal blank to ensure that the center line of the workpiece is aligned with the center line of the machine tool spindle.

[0065] When the clamping surface of one of the clamping claws 137 needs to be processed, the clamping claw 137 at this position is flipped by the swing cylinder 136, and the force between the clamping claw 137 and the metal blank disappears. The steel belt 132 continues to apply force to the claw column 133 at this position, and the cross plate 1332 moves inward along the rotating shaft 1339. The claw column 133 gradually approaches between the two diagonal claw columns 133. At the same time, the four connecting handles 1335 and the claw columns 133 at the corresponding positions are mutually movable and adjusted, and the frame formed by the four claw columns 133 and the connecting handles 1335 is an approximately triangular structure.

[0066] When one of the clamping claws 137 gives way to the clamping surface, the steel belt 132 continues to hold the remaining three claw columns 133 tightly, and the three claw columns 133 increase the stability of clamping by means of the triangular structure.

[0067] When the clamping surface is processed, the clamping claw 137 gradually swings back to its original position. As the slot surface of the clamping claw 137 gradually fits the workpiece, the claw column 133 is located at the lower end of the clamping claw 137. The claw column 133 returns to its original position, and the four clamping claws 137 are restored to the state of clamping the workpiece.

[0068] When the clamping surfaces of other clamping claws 137 need to be processed, repeat the above operation.

[0069] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A regulating valve body machining turning tool, comprising a clamping mechanism (1), a supporting mechanism (2) and a turning mechanism (3), wherein the supporting mechanism (2) is mounted on the surface of a machine tool body, the turning mechanism (3) is arranged at the lower end of the supporting mechanism (2), and the clamping mechanism (1) is mounted on the upper end of the supporting mechanism (2), characterized in that: The clamping mechanism (1) comprises a base (11), a claw groove (12) and a clamp (13); the base (11) is arranged on the upper surface of the support mechanism (2); the claw groove (12) is opened on the upper surface of the base (11); the clamp (13) is located inside the base (11); the clamp (13) comprises a clamping assembly (131), a steel belt (132), a claw column (133), a clamping claw (137), a pad (138) and a control handle block (139); the pad (138) is located at the bottom end of the base (11); the control handle block (139) is arranged on the pad (138) The surface of the steel strip (132) is provided with a plurality of claw columns (133), the four claw columns (133) are respectively located on the four end surfaces of the pad (138) and the control handle block (139), the steel strip (132) is sleeved on the outer surface of the four claw columns (133), the clamping assembly (131) is installed on the lower surface of the pad (138), the clamping claw (137) is arranged at the upper end of the claw column (133), the size of the surrounding area of ​​the steel strip (132) is controlled by the clamping assembly (131), the displacement of the four claw columns (133) changes synchronously, the surrounding area is expanded, the metal blank is aligned, and the surrounding area is reduced, the metal blank is clamped by the four clamping claws (137), and fixed clamping is completed; The clamping assembly (131) comprises a driving rotating disk (1311), a protrusion (1312), a traction wall rod (1313), a movable shaft (1314), a traction column (1315), and a U-shaped movable handle block (1316); the driving rotating disk (1311) is mounted on the bottom surface of a pad (138); the two protrusions (1312) are respectively mounted on the two side surfaces of the driving rotating disk (1311); the two traction wall rods (1313) are respectively arranged at the two side ends of the driving rotating disk (1311); and a protrusion is arranged at the middle end of the traction wall rod (1313). The two protrusions are located opposite to each other, the movable shaft (1314) is arranged on the surface of the protrusion, the traction wall rod (1313) is connected to the pad (138) via the movable shaft (1314), the tip surface of the protrusion (1312) is limitedly connected to the inner surface of one end of the traction wall rod (1313), the traction column (1315) is installed on the other end of the traction wall rod (1313), the U-shaped movable handle block (1316) is arranged on the top of the traction column (1315), and the two ends of the steel belt (132) are respectively connected to the U-shaped movable handle block (1316); The control handle block (139) is composed of four independent fixed plates, which are respectively located at the four corners of the pad (138), and a matching slide groove (1391) is arranged between every two fixed plates. A cross plate (1332) is arranged at the bottom end of the claw column (133), and the cross plate (1332) matches the matching slide groove (1391). A matching groove (1333) is provided on the bottom surface of the cross plate (1332), and a round groove (1334) is provided on the inner end surface of the cross plate (1332), and the round groove (1334) is connected to the matching groove (1333).

2. The regulating valve body machining turning tool according to claim 1, characterized in that: A tooth surface ring (1331) is provided at the middle end of the claw column (133), the tooth surface ring (1331) is position-limitedly connected to the surface of the claw column (133), and the tooth surface ring (1331) is connected to the inner surface of the steel belt (132).

3. The regulating valve body machining turning tool according to claim 1, characterized in that: A connecting handle (1335) is installed on one side surface of the claw column (133), and a limiting arc groove (1338) is provided on the other side surface of the claw column (133). An arc-shaped movable clamp (1337) is movably provided on the surface of the limiting arc groove (1338). A limiting long groove (1336) is provided on the surface of the connecting handle (1335), and the connecting handle (1335) is connected to an adjacent arc-shaped movable clamp (1337) through the limiting long groove (1336).

4. The regulating valve body machining turning tool according to claim 1, characterized in that: The four side end surfaces of the pad (138) are provided with L-shaped connecting blocks (1382), one end of the L-shaped connecting block (1382) is provided with a limiting horizontal column (1381), the limiting horizontal column (1381) is located in the matching slide groove (1391), the matching slot (1333) matches the L-shaped connecting block (1382), and the limiting horizontal column (1381) matches the round through groove (1334).

5. The regulating valve body machining turning tool according to claim 3 is characterized in that: A sliding rod is provided on the inner side of the arc-shaped movable clamping block (1337), and the arc-shaped movable clamping block (1337) is connected to the limiting long groove (1336) via the sliding rod.

6. The regulating valve body machining turning tool according to claim 4, characterized in that: The four limiting transverse columns (1381) are spaced at equal intervals, and the interval between two opposing limiting transverse columns (1381) is greater than the width of the transverse plate (1332) and smaller than the length of the transverse plate (1332).

7. The regulating valve body machining turning tool according to claim 1, characterized in that: A rotating column (134) is arranged at the top of the claw column (133), a clamping claw (137) is installed at the top of the rotating column (134), a swinging groove (135) is arranged on the surface of the rotating column (134), a swinging cylinder (136) is installed inside the swinging groove (135), the rotating column (134) is connected to the clamping claw (137) via the swinging cylinder (136), and the clamping claw (137) matches the claw groove (12).

8. The regulating valve body machining turning tool according to claim 7, characterized in that: A rotating shaft (1339) is provided at the central ends of the claw column (133) and the rotating column (134), and the rotating column (134) is rotatably connected to the top end of the claw column (133) via the rotating shaft (1339).

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