High-precision double-face clamping six-jaw chuck with fine adjustment function

Abstract

This invention relates to the technical field of mechanical chuck fixtures, and in particular to a high-precision double-sided clamping six-jaw chuck with fine-tuning function. It includes a six-jaw chuck body, six convex jaw modules, fan-shaped inner soft jaws, a wire rope tensioning assembly, and an external pressing assembly. Multiple fan-shaped inner soft jaws are installed one-to-one on the side of the convex jaw modules away from the six-jaw chuck body. The fan-shaped inner soft jaws are slidably sleeved on the outside of the wire rope tensioning assembly, which can tighten the tensioning assembly. The external pressing assembly is located on the side of the fan-shaped inner soft jaw connected to the same convex jaw module away from the axis of the six-jaw chuck body. This invention utilizes the coaxial machining characteristics of machine tools to perform on-site machining of the fan-shaped inner soft jaws, increasing the number of fan-shaped inner soft jaws to form a high-precision circumferential support surface with the machine tool spindle. Simultaneously, the outer pressing assembly clamps the workpiece from the outside. The outer pressing assembly and the fan-shaped inner soft jaws form an internal support and external pressing clamping mode for the workpiece, greatly reducing workpiece clamping deformation.

Description

Technical Field

[0001] This invention relates to the technical field of mechanical chuck clamps, and in particular to a high-precision double-sided clamping six-jaw chuck with fine-tuning function. Background Technology

[0002] In the field of machining, especially in the turning and grinding of irregular parts such as precision discs, sleeves, and thin-walled components for aero-engines, chucks are the core machine tool fixtures. They are mainly used to hold workpieces, ensuring positioning accuracy, stability, and safety during machining.

[0003] Three-jaw chucks and four-jaw chucks are the most commonly used types of chucks. They are the two most frequently used clamps on lathes, and their core difference lies in their centering method.

[0004] Three-jaw chuck: The three jaws move synchronously through the internal planar threads, which can automatically align the center of a round or regular hexagonal workpiece with the center of the machine tool spindle.

[0005] Four-jaw chuck: The four jaws move independently and need to be adjusted manually.

[0006] Existing patent CN223862885U discloses a chuck for stable clamping in precision machining, belonging to the field of chuck technology. It includes a chuck base, on which a chuck housing is fixedly connected. The chuck housing has three sliding grooves on its top, and each groove has through slots on both sides. Limiting strips are slidably connected to the inner walls of the through slots. This stable clamping precision machining chuck, by setting a sliding seat, a clamping frame, a clamping block, and a rubber block, rotates an output gear rod, causing the output gear rod to drive the grooved wheel on the gear plate to rotate through gear meshing. The grooved wheel, through an arc-shaped block, drives the sliding seat to move towards the workpiece to be clamped. The clamping block on one side of the clamping frame moves with the sliding seat, causing the rubber block to press against the workpiece surface. As the sliding seat continues to move, the clamping block adjusts its clamping angle according to the shape of the workpiece, thus facilitating stable clamping of workpieces of different shapes.

[0007] The aforementioned related technologies and existing chucks have the following drawbacks: When clamping a workpiece, the chuck applies external force to the outer side of the workpiece via the jaws. If the workpiece has an internal cavity, and only the outer side is clamped, the workpiece will deform, causing it to lose coaxial alignment with the chuck and reducing machining accuracy. The six-jaw chuck system proposed in this invention aims to solve these problems simultaneously. Summary of the Invention

[0008] To address the problems mentioned in the background art, the present invention provides a high-precision double-sided clamping six-jaw chuck with fine-tuning function.

[0009] The present invention provides a high-precision double-sided clamping six-jaw chuck with fine-tuning function, which adopts the following technical solution: it includes a six-jaw chuck body, six convex jaw modules, a fan-shaped inner soft jaw, a wire rope tightening component and an outer pressing component, and the convex jaw modules are installed on the end face of the six-jaw chuck body.

[0010] The number of the fan-shaped inner soft claws is the same as the number of the convex claw modules. Multiple fan-shaped inner soft claws are installed one-to-one on the side of multiple convex claw modules away from the six-jaw chuck body. The fan-shaped inner soft claws can be disassembled and replaced.

[0011] The fan-shaped inner soft claw is slidably sleeved on the outside of the wire rope tightening assembly, which can tighten and disassemble the wire rope tightening assembly.

[0012] The number of external pressing components is the same as that of the fan-shaped inner soft claws. Multiple external pressing components are installed one-to-one on the side of multiple convex claw modules away from the six-jaw chuck body. The external pressing components are located on the side of the fan-shaped inner soft claw connected to the same convex claw module away from the axis of the six-jaw chuck body. The external pressing components can move relative to the fan-shaped inner soft claw connected to the same convex claw module. The external pressing components and the fan-shaped inner soft claws form an internal support and external pressing clamping mode for the workpiece.

[0013] Optionally, the fan-shaped inner soft claws are arranged in an arc, and multiple fan-shaped inner soft claws are evenly distributed in a circumferential array around the axis of the six-jaw chuck.

[0014] Optionally, the wire rope tightening assembly includes: The rope body has each fan-shaped inner soft claw fitted onto the outside of the rope body, allowing the rope body to move relative to the fan-shaped inner soft claw.

[0015] The clamping plate is provided in two parts. The two clamping plates are installed together. The two clamping plates have grooves on their adjacent sides. When the two clamping plates are joined together, the four grooves form two rope channels. The two ends of the rope are located in the two rope channels respectively.

[0016] There are two tensioning wheels. The tensioning wheel is rotatably connected to one of the clamping plates. The tensioning wheel rotates relative to the clamping plate. The two tensioning wheels are respectively sleeved and installed at both ends of the two ropes. The ropes can be removed from the tensioning wheels.

[0017] Optionally, the external pressing assembly includes a mounting block and an adjusting block. The mounting block is connected to a corresponding convex claw module, and the other side of the mounting block is connected to the adjusting block, which can slide relative to the mounting block.

[0018] Optionally, it also includes a power drive frame, which is connected to the six-jaw chuck body and is capable of moving along the axis of the six-jaw chuck body.

[0019] Each adjusting block is equipped with an elastic tension component on both sides. The other end of the elastic tension component is connected to the power drive frame. The power drive frame has a through groove for the elastic tension component to slide. The power drive frame can pull the adjusting block through the elastic tension component.

[0020] Optionally, the elastic tension assembly includes an inner slider rod and a bending tension rod. The bending tension rod is connected to an adjacent adjusting block. One end of the inner slider rod is slidably sleeved on the outside of the inner slider rod, and the other end of the inner slider rod is slidably inserted into the inside of an adjacent through slot. The inner slider rod and the bending tension rod are elastically connected.

[0021] Optionally, the inner side of the bending tension rod is provided with two tension tooth plates, the two tension tooth plates are toothed on the side away from each other, and two tooth grooves are opened on the inner side of the bending tension rod. The two tension tooth plates are arranged corresponding to the two tooth grooves. The two tension tooth plates are slidably inserted into the inner slider rod at one end located outside the bending tension rod, and the tension tooth plates are elastically connected to the inner slider rod.

[0022] Optionally, a pressure rod is provided between the two tension teeth, and the inner slider rod is slidably sleeved on the end of the pressure rod located outside the bent tension rod. The pressure rod and the inner slider rod are elastically connected, and the part of the pressure rod extending out of the inner slider rod is located between the six-jaw chuck body and the power drive frame.

[0023] Optionally, the two tension tooth plates are provided with inclined pressure grooves at equal intervals on their sides, and the pressure rod is provided with a protrusion that matches the inclined pressure groove on the side near the tension tooth plate. The side of the pressure rod away from the six-jaw chuck body is inclined.

[0024] Optionally, the maximum distance between the adjusting block and the six-jaw chuck body is less than the minimum distance between the inner soft claw in the sector and the six-jaw chuck body.

[0025] In summary, the present invention has the following beneficial technical effects: This invention utilizes the combined use of a fan-shaped inner soft jaw and an outer pressing assembly. Before clamping, a fan-shaped inner soft jaw of appropriate diameter is installed, and the fan-shaped inner soft jaw is controlled to move to the workpiece clamping position. Taking advantage of the coaxial machining characteristics of the machine tool, the fan-shaped inner soft jaw is machined on-site, increasing the number of fan-shaped inner soft jaws to form a high-precision circumferential support surface with the machine tool spindle. During clamping, the fan-shaped inner soft jaw can fully support the inner side of the workpiece, while the outer pressing assembly clamps the outer side of the workpiece. The outer pressing assembly and the fan-shaped inner soft jaw form an inner support and outer pressing clamping mode for the workpiece, greatly reducing workpiece clamping deformation.

[0026] This invention utilizes the cooperation between the rope, clamping plate, and tightening wheel. Before machining the outer ring surface of the fan-shaped inner soft claw, the rope is gradually tightened by winding the rope around it with the tightening wheel. The tightened rope clamps the fan-shaped inner soft claw that is sleeved on the outside, eliminating the gap between it and the convex claw module, simulating a real clamping state. Machining the fan-shaped inner soft claw in this state ensures that the fan-shaped inner soft claw is in the optimal force state when the workpiece is clamped, thereby obtaining extremely high positioning accuracy.

[0027] This invention utilizes the cooperation between toothed grooves, tension toothed plates, and pressure rods. As the power drive frame moves downward, the elastic pull adjustment block between the inner slider rod and the bending tension rod moves relative to the mounting block, causing the mounting block to press against the outer side of the workpiece. After the power drive frame drives the pressure rod to contact the six-jaw chuck body, it continues to approach the six-jaw chuck body, gradually pushing the pressure rod into the bending tension rod. The protruding inclined surface of the pressure rod pushes the two contacting tension toothed plates away from each other and engages with the corresponding toothed grooves. Depending on the distance between the contacting workpiece position and the machine tool axis, the adjustment block moves a different distance relative to the mounting block. After the toothed groove and tension toothed plate engage, the power drive frame applies a rigid tension to the bending tension rod and adjustment block through the tension toothed plate and toothed groove, stably pressing against the outer side of the workpiece. It can simultaneously control all adjustment blocks to press against the outer side of the workpiece, increasing the efficiency of workpiece clamping. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a front view structural diagram in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the fan-shaped inner soft claw and the rope in an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection between the tightening wheel and the clamping plate in an embodiment of the present invention; Figure 5 This is a schematic diagram of the power drive frame in an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the mounting block and the convex claw module in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connection between the mounting block and the adjusting block in an embodiment of the present invention; Figure 8 This is a schematic diagram of the connection between the pressure rod and the tension toothed plate in an embodiment of the present invention; Figure 9 This is an embodiment of the present invention. Figure 8 Enlarged schematic diagram of the structure at point A in the middle.

[0029] Reference numerals: 1. Six-jaw chuck body; 2. Convex jaw module; 3. Fan-shaped inner soft jaw; 4. Wire rope tightening assembly; 41. Rope body; 42. Clamping plate; 43. Groove; 44. Tightening wheel; 5. External pressure assembly; 51. Mounting block; 52. Adjusting block; 53. Elastic tension assembly; 531. Inner slider rod; 532. Bending tension rod; 533. Tension tooth plate; 534. Tooth groove; 535. Pressure rod; 536. Inclined pressure groove; 6. Power drive frame; 7. Through slot. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0035] This invention discloses a high-precision double-sided clamping six-jaw chuck with fine-tuning function. For example... Figures 1-9 As shown, it includes a six-jaw chuck body 1, six convex jaw modules 2, a fan-shaped inner soft jaw 3, a wire rope tightening assembly 4, and an outer pressing assembly 5.

[0036] In this embodiment, the convex jaw module 2 is installed on the end face of the six-jaw chuck body 1. The six-jaw chuck body 1 is a manual self-centering six-jaw chuck, which contains a precision transmission mechanism—end face threaded disc. By turning a small bevel gear with a wrench, the six convex jaw modules 2 can be driven to move synchronously in the radial direction, realizing the self-centering function and laying the foundation for efficient clamping.

[0037] The mechanism of six convex jaw modules 2 cooperating with the six-jaw chuck body 1 enables rapid clamping, avoiding the cumbersome "dial-checking" alignment of single-action four-jaw chucks, improving clamping efficiency several times, and making it suitable for mass production.

[0038] The number of fan-shaped inner soft claws 3 is the same as the number of convex claw modules 2. Multiple fan-shaped inner soft claws 3 are installed one-to-one on the side of multiple convex claw modules 2 away from the six-jaw chuck body 1. The fan-shaped inner soft claws 3 can be disassembled and replaced. The fan-shaped inner soft claws 3 and the convex claw modules 2 are connected by bolts. The fan-shaped inner soft claws 3 are arranged in an arc. Multiple fan-shaped inner soft claws 3 are evenly distributed in a circular array around the axis of the six-jaw chuck body 1.

[0039] The fan-shaped inner soft claw 3 is slidably sleeved on the outside of the wire rope tightening component 4. The wire rope tightening component 4 can tighten and can be disassembled. The appropriate fan-shaped inner soft claw 3 can be replaced according to the inner diameter of the clamped workpiece. The fan-shaped inner soft claw 3 is fan-shaped and made of relatively soft material, such as low carbon steel, which is convenient for circumferential machining of the outer ring surface of the machine tool.

[0040] In an alternative embodiment, the wire rope tightening assembly 4 includes a rope body 41, a clamping plate 42, and a tightening wheel 44.

[0041] Each fan-shaped inner soft claw 3 is sleeved and installed on the outside of the rope body 41. The fan-shaped inner soft claw 3 is located on the rope body 41 and has a hole groove with the same axis as the fan-shaped inner soft claw 3, so that the rope body 41 can apply a uniform clamping force in the circumferential direction to the fan-shaped inner soft claw 3, and the rope body 41 can move relative to the fan-shaped inner soft claw 3.

[0042] There are two clamping plates 42. The two clamping plates 42 are installed together. The two clamping plates 42 have grooves 43 on their sides that are close to each other. When the two clamping plates 42 are combined, the four grooves 43 form two rope channels. The two ends of the rope 41 are located in the two rope channels respectively.

[0043] There are two tensioning wheels 44. The tensioning wheel 44 is rotatably connected to one of the clamping plates 42. The tensioning wheel 44 rotates relative to the clamping plate 42. The two tensioning wheels 44 are respectively sleeved and installed at both ends of the two ropes 41. The ropes 41 can be removed from the tensioning wheels 44.

[0044] In this embodiment, the tightening wheel 44 has a through hole at the installation location of the rope 41. The tightening wheel 44 is equipped with a bolt that can press the rope 41 into the through hole. After loosening the bolt, the rope 41 can be separated from the through hole and removed. During installation, the two ends of the rope 41 are passed through the through holes of the two tightening wheels 44, and then the bolts are tightened to press the rope 41 into the through hole, thus completing the installation of the rope 41.

[0045] The clamping plate 42 is equipped with an electric box that drives the two tensioning wheels 44 to rotate. The electric box is powered by a wireless motor. The clamping plate 42 is equipped with a battery that provides power to the wireless motor and can drive the tensioning wheels 44 to rotate. As the tensioning wheels 44 rotate, they can wind around the rope 41 and gradually tighten the rope 41, thus tightening the multiple fan-shaped inner soft claws 3 attached to the outside.

[0046] This embodiment not only provides chuck hardware, but also forms a complete and standardized soft jaw preparation and management process, including soft jaw selection, size calculation, installation, clamping and repair, ensuring that the chuck system can be used correctly and efficiently, and fully utilize its performance.

[0047] The number of external pressing components 5 and the number of fan-shaped inner soft claws 3 are the same. Multiple external pressing components 5 are installed one-to-one on the side of multiple convex claw modules 2 away from the six-jaw chuck body 1. The external pressing components 5 are located on the side of the fan-shaped inner soft claws 3 connected to the same convex claw module 2 away from the axis of the six-jaw chuck body 1. The external pressing components 5 can move relative to the fan-shaped inner soft claws 3 connected to the same convex claw module 2. The external pressing components 5 and the fan-shaped inner soft claws 3 form an internal support and external pressing clamping mode for the workpiece.

[0048] In an optional embodiment, the external pressing assembly 5 includes a mounting block 51, a power drive frame 6, and an adjusting block 52. The mounting block 51 is connected to the corresponding convex claw module 2, and the other side of the mounting block 51 is connected to the adjusting block 52. The adjusting block 52 can slide relative to the mounting block 51. The mounting block 51 is provided with a guide rail at the sliding position of the adjusting block 52 to limit the sliding trajectory of the adjusting block 52 relative to the mounting block 51.

[0049] In this embodiment, the convex claw module 2 and the mounting block 51 are connected by bolts, and a T-slot is provided at the connection between the convex claw module 2 and the mounting block 51, which can change the installation position of the mounting block 51.

[0050] The power drive frame 6 is connected to the six-jaw chuck body 1, and the power drive frame 6 can move along the axis of the six-jaw chuck body 1.

[0051] In this embodiment, a threaded rod is rotatably mounted at the shaft center of the power drive frame 6, and the other end of the threaded rod is threadedly connected to the axis of the six-jaw chuck body 1. When the threaded rod is rotated, the threaded rod controls the power drive frame 6 to move relative to the six-jaw chuck body 1 along the axis by engaging with the six-jaw chuck body 1.

[0052] The maximum distance between the adjusting block 52 and the six-jaw chuck body 1 is less than the minimum distance between the sector-shaped inner soft jaw 3 and the six-jaw chuck body 1, ensuring that the adjusting block 52 does not interfere with the machining process when the machine tool is machining the outer ring surface of the sector-shaped inner soft jaw 3.

[0053] Each adjusting block 52 is equipped with an elastic tension component 53 on both sides. The other end of the elastic tension component 53 is connected to the power drive frame 6. The power drive frame 6 has a through groove 7 for the elastic tension component 53 to slide. The power drive frame 6 can pull the adjusting block 52 through the elastic tension component 53.

[0054] In this embodiment, the power drive frame 6 pulls the adjustment block 52 through the elastic tension component 53, causing the adjustment block 52 to fit against the outer side of the workpiece. When the outer side of the workpiece is not circumferential, the adjustment block 52 can simultaneously fit against and limit the outer side of the workpiece by moving different distances.

[0055] In an optional embodiment, the elastic tension assembly 53 includes an inner slider rod 531 and a bending tension rod 532. The bending tension rod 532 is connected to an adjacent adjusting block 52. One end of the inner slider rod 531 is slidably sleeved on the outside of the inner slider rod 531, and the other end of the inner slider rod 531 is slidably inserted into the interior of an adjacent through slot 7. The inner slider rod 531 and the bending tension rod 532 are elastically connected. Preferably, the inner slider rod 531 and the bending tension rod 532 are connected by a tension spring, which can pull the inner slider rod 531 closer to the bending tension rod 532.

[0056] In this embodiment, when the six-jaw chuck body 1 drives the convex jaw module 2 to move, the inner slider rod 531 slides inside the through groove 7, and the through groove 7 is parallel to the moving trajectory of the corresponding convex jaw module 2.

[0057] Two tension teeth 533 are provided on the inner side of the bent tension rod 532. The two tension teeth 533 are toothed on the side away from each other. Two toothed grooves 534 are opened on the inner side of the bent tension rod 532. The two tension teeth 533 are correspondingly arranged with the two toothed grooves 534. The two tension teeth 533 are slidably inserted into the inner slider rod 531 at one end outside the bent tension rod 532. The tension teeth 533 and the inner slider rod 531 are elastically connected. Preferably, the tension teeth 533 and the inner slider rod 531 are connected by a straight spring, which can push the two tension teeth 533 closer to each other.

[0058] A pressure rod 535 is provided between the two tension tooth plates 533. The inner slider rod 531 is slidably sleeved on the end of the pressure rod 535 located outside the bent tension rod 532. The pressure rod 535 and the inner slider rod 531 are elastically connected. Preferably, the pressure rod 535 and the inner slider rod 531 are connected by a spring. The pressure rod 535 is pushed to move out of the inner slider rod 531. The part of the pressure rod 535 that extends out of the inner slider rod 531 is located between the six-jaw chuck body 1 and the power drive frame 6.

[0059] Two tension tooth plates 533 are provided with inclined pressure grooves 536 at equal distances on their sides. The pressure rod 535 is provided with a protrusion that matches the inclined pressure groove 536 on its side near the tension tooth plate 533. The side of the pressure rod 535 away from the six-jaw chuck body 1 is inclined.

[0060] In this embodiment, before the pressure rod 535 contacts the six-jaw chuck body 1, one end of the pressure rod 535 extends out of the inner slider rod 531 under the elasticity of the inner slider rod 531. At this time, the protruding part of the pressure rod 535 is located at the inclined pressure groove 536 of the tension tooth plate 533. At this time, the tension tooth plate 533 separates from the tooth groove 534 under the elasticity of the inner slider rod 531, and the inner slider rod 531 can move relative to the bending tension rod 532. After the pressure rod 535 contacts the six-jaw chuck body 1, the power drive frame 6 continues to approach. In the six-jaw chuck body 1, the pressure rod 535 is gradually pressed into the inner slider rod 531. The inclined surface of the protruding part of the pressure rod 535 pushes the inclined pressure groove 536 to push the two tension plates 533 to cooperate with the tooth groove 534. The inner slider rod 531 can no longer move relative to the bending tension rod 532. The power drive frame 6 can stably pull the adjusting block 52 to press against the outside of the workpiece through the inner slider rod 531 and the bending tension rod 532, and apply radial pressing force from the outside of the workpiece end face to prevent the workpiece from moving during processing.

[0061] The working principle is as follows: Different radii of sector-shaped inner soft jaws 3 are replaced according to workpieces of different sizes. The sector-shaped inner soft jaws 3 are controlled to move to the position where they clamp the workpiece. The steel wire rope tightening component 4 tightens the hoop of the sector-shaped inner soft jaws 3, eliminating the gap between it and the convex jaw module 2, simulating a real clamping state. Utilizing the coaxial machining characteristics of the machine tool, the outer ring surface of the sector-shaped inner soft jaws 3 is machined on-site, increasing the number of sector-shaped inner soft jaws 3 to form a high-precision circumferential support surface with the machine tool spindle. During clamping, the sector-shaped inner soft jaws 3 can fully support the inner side of the workpiece, while the outer external pressing component 5 clamps the outer side of the workpiece. The outer pressing component 5 and the sector-shaped inner soft jaws 3 form an internal support and external pressing clamping mode, causing the workpiece to be subjected to force both radially inward and outward, reducing workpiece deformation during clamping.

[0062] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-precision double-sided clamping six-jaw chuck with fine-tuning function, comprising a six-jaw chuck body (1) and six convex jaw modules (2), wherein the convex jaw modules (2) are mounted on the end face of the six-jaw chuck body (1), characterized in that, Also includes: The number of fan-shaped inner soft claws (3) is the same as the number of convex claw modules (2). Multiple fan-shaped inner soft claws (3) are installed one-to-one on the side of multiple convex claw modules (2) away from the six-jaw chuck body (1). The fan-shaped inner soft claws (3) can be disassembled and replaced. The wire rope tightening assembly (4) has a fan-shaped inner soft claw (3) that slides around the outside of the wire rope tightening assembly (4). The wire rope tightening assembly (4) can tighten and can be disassembled. The number of external pressing components (5) is the same as that of the fan-shaped inner soft claws (3). Multiple external pressing components (5) are installed one-to-one on the side of multiple convex claw modules (2) away from the six-jaw chuck body (1). The external pressing components (5) are located on the side of the fan-shaped inner soft claws (3) connected to the same convex claw module (2) away from the axis of the six-jaw chuck body (1). The external pressing components (5) can move relative to the fan-shaped inner soft claws (3) connected to the same convex claw module (2). The external pressing components (5) and the fan-shaped inner soft claws (3) form an internal support and external pressing clamping mode for the workpiece.

2. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 1, characterized in that: The fan-shaped inner soft claw (3) is set in an arc, and multiple fan-shaped inner soft claws (3) are evenly distributed in a circular array around the axis of the six-jaw chuck body (1).

3. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 1, characterized in that: The wire rope tightening assembly (4) includes: The rope body (41) has each fan-shaped inner soft claw (3) fitted onto the outside of the rope body (41), and the rope body (41) can move relative to the fan-shaped inner soft claw (3); Clamping plate (42), two clamping plates (42) are provided, the two clamping plates (42) are installed together, and the two clamping plates (42) are provided with grooves (43) on the side close to each other. When the two clamping plates (42) are combined, the four grooves (43) form two rope channels, and the two ends of the rope (41) are respectively located in the two rope channels; There are two tightening wheels (44). The tightening wheel (44) is rotatably connected to one of the clamping plates (42). The tightening wheel (44) rotates relative to the clamping plate (42). The two tightening wheels (44) are respectively sleeved and installed at both ends of the two ropes (41). The ropes (41) can be removed from the tightening wheels (44).

4. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 1, characterized in that: The external pressing assembly (5) includes a mounting block (51) and an adjusting block (52). The mounting block (51) is connected to the corresponding convex claw module (2). The other side of the mounting block (51) is connected to the adjusting block (52). The adjusting block (52) can slide relative to the mounting block (51).

5. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 4, characterized in that: It also includes a power drive frame (6), which is connected to the six-jaw chuck body (1), and the power drive frame (6) can move along the axis of the six-jaw chuck body (1); Each adjusting block (52) is equipped with an elastic tension component (53) on both sides. The other end of the elastic tension component (53) is connected to the power drive frame (6). The power drive frame (6) has a through groove (7) for the elastic tension component (53) to slide. The power drive frame (6) can pull the adjusting block (52) through the elastic tension component (53).

6. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 5, characterized in that: The elastic tension assembly (53) includes an inner slider rod (531) and a bending tension rod (532). The bending tension rod (532) is connected to an adjacent adjusting block (52). One end of the inner slider rod (531) is slidably sleeved on the outside of the inner slider rod (531), and the other end of the inner slider rod (531) is slidably inserted into the inside of an adjacent through slot (7). The inner slider rod (531) and the bending tension rod (532) are elastically connected.

7. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 6, characterized in that: The inner side of the bending tension rod (532) is provided with two tension tooth plates (533). The two tension tooth plates (533) are toothed on the side away from each other. The inner side of the bending tension rod (532) is provided with two tooth grooves (534). The two tension tooth plates (533) are correspondingly arranged with the two tooth grooves (534). The two tension tooth plates (533) are located outside the bending tension rod (532) and are slidably inserted into the inner slider rod (531). The tension tooth plates (533) and the inner slider rod (531) are elastically connected.

8. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 7, characterized in that: A pressure rod (535) is provided between the two tension teeth (533). The inner slider rod (531) is slidably sleeved on the pressure rod (535) at one end outside the bent tension rod (532). The pressure rod (535) is elastically connected to the inner slider rod (531). The part of the pressure rod (535) extending out of the inner slider rod (531) is located between the six-jaw chuck body (1) and the power drive frame (6).

9. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 8, characterized in that: Two tension tooth plates (533) are provided with inclined pressure grooves (536) at equal distances on their side. The pressure rod (535) is provided with a protrusion that matches the inclined pressure groove (536) on the side close to the tension tooth plate (533). The side of the pressure rod (535) away from the six-jaw chuck body (1) is inclined.

10. A high-precision double-sided clamping six-jaw chuck with fine-tuning function according to claim 5, characterized in that: The maximum distance between the adjusting block (52) and the six-jaw chuck body (1) is less than the minimum distance between the fan-shaped inner soft claw (3) and the six-jaw chuck body (1).

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