High-precision rotary part auxiliary machining clamp and clamping method

Abstract

The invention provides a high-precision revolved body part auxiliary machining clamp and a clamping method. The high-precision revolved body part auxiliary machining clamp mainly comprises a multi-arc-groove annular clamp inner ring, an annular rolling fastening outer frame, a rolling clamp supporting body assembly and a guide supporting precision control roller assembly. The multi-arc-groove annular clamp inner ring is a special device for fixing the clamp body, the annular rolling and tightening outer frame is a supporting and connecting device of the clamp body and drives the annular clamp body inner ring to rotate to clamp a workpiece, and the guide supporting precise control roller assembly and the rolling clamp supporting body assembly are main control mechanisms for achieving precise clamping of the clamp and the clamp body. By means of the synergistic effect of the above parts, it is guaranteed that the workpiece is clamped according to accurate adjustment of scales of the accurate control ruler so as to meet individual requirements of different machining occasions and different machined workpieces, and the device has the advantages of being stable in clamping, light, reliable, low in cost, high in compatibility, not prone to damaging the workpiece and the like when used for clamping. The device is widely applied to processing production, assembly and detection of workpieces.

Description

Technical Field

[0001] The present invention relates to the field of mechanical parts processing and manufacturing, and in particular to a high-precision rotating body parts auxiliary processing fixture and a clamping method. Background Art

[0002] Mechanical fixtures are important components of machining machine tools. During machining, the clamping accuracy of the workpiece will directly affect the final machining quality and service performance of the parts. In the current industry, triangular chuck-type fixtures are the most commonly used auxiliary clamping devices for the machining and manufacturing of rotating parts. They have the advantages of stable clamping and good reliability. However, they also have problems such as easy deformation and damage of the workpiece, affecting the machining accuracy, and requiring the use of ejectors, resulting in high machining and manufacturing costs. With the increasing development of science and technology, the domestic manufacturing industry has gradually deepened its demand for high-precision clamping technology and devices. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned technologies, the present invention proposes a high-precision auxiliary processing fixture for rotating parts and a method for using the same. The fixture of the present invention can accurately control the rotation angle of the annular rolling groove and the annular rolling and tightening outer frame by setting precision control scales on the upper and lower layers, thereby achieving precise adjustment of the radial feed size and clamping force of the cylindrical roller, improving the clamping accuracy of the workpiece, and thereby ensuring the final processing accuracy.

[0004] In order to realize the above-mentioned technical features, the object of the present invention is realized as follows: a high-precision rotating parts auxiliary processing fixture, comprising four parts: a multi-arc groove annular fixture inner ring, an annular rolling and tightening outer frame, a rolling clamp support assembly, and a guide support precision control roller assembly. The rolling clamp support assembly is located between the multi-arc groove annular fixture inner ring and the annular rolling and tightening outer frame, and is movably connected to the multi-arc groove annular fixture inner ring and the annular rolling and tightening outer frame. The guide support precision control roller assembly is arranged on the outer ring of the annular rolling and tightening outer frame, and is movably connected to the annular rolling and tightening outer frame.

[0005] The inner ring of the multi-arc groove annular clamp is a hollow structure on the inside, including an annular clamp body, each of which is provided with a plurality of arc-shaped limiting sliding grooves inwardly, and an annular rolling groove is embedded in the outer ring, one end of the arc-shaped limiting sliding groove is located in the middle of the annular clamp body, and the other end radially extends beyond the inner ring of the annular clamp body; The annular rolling and tightening outer frame comprises an upper frame and a lower frame, the upper frame and the lower frame are symmetrically distributed, the inner ring is provided with a plurality of rolling clamp support mounting holes, and the outer ring is provided with a plurality of guide support precision control roller mounting holes.

[0006] The rolling clamp support assembly includes a symmetrical stepped shaft I and a cylindrical roller, wherein the cylindrical roller is fixedly connected to the symmetrical stepped shaft I via a key, and the symmetrical stepped shaft I is symmetrically provided with bearings I at the shoulders at both ends, and axially limited by providing a first threaded end cover which is threadedly matched with the rolling clamp support mounting hole, and is movably connected to the annular rolling locking outer frame.

[0007] The guide support precision control roller assembly includes a threaded stepped shaft, a bearing II, and a precision control roller. The precision control roller is fixedly connected to the threaded stepped shaft by a key and precisely matched with the axial direction of the annular rolling groove. Asymmetric shoulders are provided at both ends of the threaded stepped shaft. Bearing II is arranged at the shoulders at both ends, and a second threaded end cover is arranged at one end to axially limit the thread of the guide support precision control roller mounting hole, and is movably connected to the annular rolling locking outer frame.

[0008] The outer ring guide support precision control roller mounting hole of the upper frame is a through hole, and the outer ring guide support precision control roller mounting hole of the lower frame is a stepped hole.

[0009] One end of the threaded stepped shaft is provided with a fastening thread and a lock nut, and is movably connected to the end face of one side of the second threaded end cover through a friction pair. The corresponding friction factor of the friction pair changes nonlinearly with the locking degree of the lock nut and the end face of one side of the second threaded end cover.

[0010] The contact surface between the precision control roller and the lock nut is provided with anti-skid patterns.

[0011] Precision control scales I are provided on both sides of the annular rolling groove, and precision control scales II are provided on the inner sides of the upper and lower frames. The precision control scales II and I have the same scale range, and the scales correspond one to one. When the cylindrical roller moves clockwise to the right extreme position of the arc-shaped limit groove, the zero lines of the precision control scales II and I are aligned and overlapped.

[0012] The scale range and limit scale of the precision control scale II and precision control scale I respectively correspond to the range and limit position of radial feeding of the precision control roller rolling the cylindrical roller along the annular rolling groove.

[0013] The method for clamping a rotating body part by using the high-precision rotating body part auxiliary processing fixture comprises the following steps: The above-mentioned fixture is used to assist the clamping of the workpiece during machining, and the above-mentioned two sets of fixtures are installed on two processing machine tools, and the central axes of the two fixtures are adjusted to keep the coaxiality of the two fixtures within a certain accuracy and range; Fix the left end of the rotating workpiece: Step 1: The precision control roller of the precision control roller assembly is supported by rolling guide in a clockwise manner, and the internal cylindrical rollers are driven to slide to the limit position at one end of the arc-shaped limit slide groove under the action of the annular rolling and tightening outer frame; Step 2: Insert the left end of the rotating workpiece into the inner ring of the multi-arc groove annular fixture; Step 3: Roll the precision roller of the precision roller assembly in a counterclockwise direction, adjust the relative rotation angle between the annular rolling clamping outer frame and the inner ring of the multi-arc groove annular fixture, and accurately control the spatial position of multiple cylindrical rollers in the arc-shaped limit groove according to the relative scale and scale range between the precision scale I and precision scale II of the two, that is, the radial feed size of the cylindrical rollers, and then accurately control the clamping state of the workpiece; Step 4: When the relative scales of precision control scale I and precision control scale II are adjusted to achieve the best clamping state between multiple cylindrical rollers and the workpiece, the self-locking clamping is achieved by adjusting the lock nut at one end of the threaded stepped shaft. At this time, the tool is started again to complete the processing procedure of the workpiece; Fix the right end of the rotating workpiece: Step 1: The precision control roller of the precision control roller assembly is supported by rolling guide in a clockwise manner, and the internal cylindrical rollers are driven to slide to the limit position at one end of the arc-shaped limit slide groove under the action of the annular rolling and tightening outer frame; Step 2: Insert the right end of the rotating workpiece into the inner ring of the multi-arc groove annular fixture; Step 3: Roll the precision roller of the precision roller assembly in a counterclockwise direction, adjust the relative rotation angle between the annular rolling clamping outer frame and the inner ring of the multi-arc groove annular fixture, and accurately control the spatial position of multiple cylindrical rollers in the arc-shaped limit groove according to the relative scale and scale range between the precision scale I and precision scale II of the two, that is, the radial feed size of the cylindrical rollers, and then accurately control the clamping state of the workpiece; Step 4: After adjusting the relative scales of precision control scale I and precision control scale II to achieve the best clamping state between multiple cylindrical rollers and the workpiece, self-locking clamping is achieved by adjusting the lock nut at one end of the threaded stepped shaft. At this time, start the tool to complete the processing procedure of the workpiece.

[0014] Beneficial effects of the present invention: 1. The present invention can accurately control the rotation angle of the annular rolling and tightening device by setting precision control scales on the upper and lower layers of the annular rolling groove and the annular rolling and tightening outer frame, thereby realizing accurate adjustment of the radial feed size and clamping force of the cylindrical roller, improving the clamping accuracy of the workpiece, and thus ensuring the final processing accuracy.

[0015] 2. The present invention adopts high secondary line constraint to clamp the workpiece. On the one hand, it reduces the damage to the workpiece during clamping and improves the clamping accuracy of the workpiece. On the other hand, the use of uniformly distributed centering constraint can greatly improve the stability and reliability of workpiece clamping, ensuring that a good clamping state can be maintained during long-term and high-intensity use.

[0016] 3. The present invention adopts anti-skid rollers to drive the cylindrical rollers to move radially, adjusts the clamping and loosening of the workpiece, and adopts micro lock nuts to fix and maintain the clamping state of the workpiece. The operation is convenient and fast, and the fixture structure is lightweight and the design is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the inner ring of the multi-arc groove annular fixture.

[0020] Figure 3 This is a structural diagram of the annular rolling tightening outer frame.

[0021] Figure 4 Schematic diagram of the exploded structure of the guide support precision control roller assembly.

[0022] Figure 5 It is a schematic diagram of the exploded structure of the rolling clamp support assembly.

[0023] In the figure: the inner ring of the multi-arc groove annular clamp 1, the rolling clamp support assembly 2, the annular rolling fixed outer frame 3, the guide support precision control roller assembly 4; Ring 1-1, arc-shaped limit slide groove 1-2, ring rolling groove 1-3, precision control scale I 1-4; Symmetrical stepped shaft Ⅰ2-1, bearing Ⅰ2-2, first threaded end cover 2-3, cylindrical roller 2-4; Upper shelf 3-1, lower shelf 3-2, rolling clamp support mounting hole 3-3, guide support precision roller mounting hole 3-4, precision scale II 3-5; Threaded stepped shaft 4-1, bearing II 4-2, precision-controlled roller 4-3, second threaded end cover 4-4, fastening thread 4-5, lock nut 4-6. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1: like Figure 1-5 As shown, Figure 1 As shown, a high-precision rotating part auxiliary processing fixture is used. The present invention uses a multi-arc groove annular fixture inner ring 1 as the main body, which is movably connected to the upper frame 3-1 and the lower frame 3-2 of the annular rolling and tightening outer frame 3, and is slidingly connected to the rolling clamp support assembly 2 inside. The guide support precision control roller assembly 4 is rollingly connected to the annular rolling grooves 1-3 of the multi-arc groove annular fixture inner ring 1, and is fixed by the annular rolling and tightening outer frame 3.

[0026] Furthermore, the annular rolling clamping outer frame 3, as a fixing and connecting device for the clamp body, cooperates with the guide support precision control roller assembly 4, and accurately controls the rotation of the annular rolling clamping outer frame through the precision control roller 4-3, so that one end of the arc-shaped limit slide 1-2 of the inner ring 1 of the multi-arc groove annular clamp is involved to go out to clamp the workpiece. The inner ring 1 of the multi-arc groove annular clamp, as the main body of the device, is provided with an annular rolling groove 1-3 and multiple arc-shaped limit slides 1-2 to connect the parts in series, and can realize the sliding of multiple cylindrical rollers 2-4 in the arc-shaped limit slide 1-2 and the rolling of multiple precision control rollers 4-3 in the annular rolling groove 1-3. The annular rolling clamping outer frame 3 is tightly combined with the guide support precision control roller assembly 4 to form an integrated structural design, which is not only convenient for installation and operation, but also does not require tedious adjustments before installation. The rolling clamp support assembly 2 serves as a clamp body driving assembly, and realizes the sliding of the cylindrical rollers 2-4 by controlling the precision control roller 4-3 drive.

[0027] Further, such as Figure 2 As shown, the inner ring 1 of the multi-arc groove annular clamp is a hollow structure on the inside, including an annular clamp body 1-1, and the annular clamp body 1-1 is provided with a plurality of arc-shaped limit sliding grooves 1-2 inwardly, and the arc-shaped limit sliding grooves 1-2 serve as sliding track grooves for the cylindrical rollers 2-4, and the annular rolling and tightening outer frame 3 is driven by regulating the precision control roller 4-3 to control the sliding of the cylindrical rollers 2-4; an annular rolling groove 1-3 is embedded in the outer ring, and the annular rolling groove 1-3 serves as the rolling track groove of the precision control roller 4-3, which is used for the precision control roller 4-3 to move along the The radial rolling of the shaft has a certain restraining effect. One end of the arc-shaped limit slide groove 1-2 is located in the middle of the ring clamp body 1-1, and the other end radially extends out of the inner ring of the ring clamp body 1-1. When the cylindrical roller 2-4 is located at one end of the middle of the arc-shaped limit slide groove 1-2, it is in the limit position, and the entire ring clamp body is in a non-working state. The other end of the arc-shaped limit slide groove 1-2 does not extend out. The cylindrical roller 2-4 slides along the slide groove from the limit position, so that the other end of the arc-shaped limit slide groove 1-2 gradually extends out. The arc-shaped limit slide groove 1-2 can not only clamp the workpiece, but also reserve a certain position so that the three parts of the multi-arc groove ring clamp inner ring 1, the rolling clamp support assembly 2 and the ring rolling fixed outer frame 3 are completely connected. The slide groove interface position is also regularly arranged, which can effectively avoid motion interference during operation.

[0028] Further, such as Figure 3 As shown, the annular rolling and tightening outer frame 3 includes an upper frame 3-1 and a lower frame 3-2, the upper frame 3-1 and the lower frame 3-2 are symmetrically distributed, the inner ring is provided with a plurality of rolling clamp support mounting holes 3-3, and the outer ring is provided with a plurality of guide support precision control roller mounting holes 3-4. This device can be connected with other devices through the inner and outer mounting holes of the upper frame 3-1 and the lower frame 3-2 to achieve the fixation and connection of the entire clamp body.

[0029] Further, such as Figure 5 As shown, the rolling clamp support assembly 2 includes a symmetrical stepped shaft I2-1 and a cylindrical roller 2-4, and the cylindrical roller 2-4 is fixedly connected to the symmetrical stepped shaft I2-1 by a key. The symmetrical stepped shaft I2-1 is symmetrically provided with bearings I2-2 at the shoulders at both ends, and is axially limited by threaded end covers 2-3 and rolling clamp support mounting holes 3-3 of the annular rolling and clamping outer frame 3, and is movably connected to the annular rolling and clamping outer frame 3. The device serves as a transmission device for the clamp body, which ensures the stability and reliability of the transmission.

[0030] Further, such as Figure 4 As shown, the guide support precision control roller assembly 4 includes a threaded stepped shaft 4-1, a bearing II 4-2, and a precision control roller 4-3. The precision control roller 4-3 is fixedly connected to the threaded stepped shaft 4-1 by a key, and is axially precisely matched with the annular rolling groove 1-3 provided on the outer ring 1 of the multi-arc groove annular clamp. Asymmetric shoulders are provided at both ends of the threaded stepped shaft 4-1. Bearings II 4-2 are provided at the shoulders at both ends, and a threaded end cover 4-4 is provided at one end to threadably match the axial limit with the outer ring guide support precision control roller mounting hole 3-4 of the annular rolling and clamping outer frame 3, and is movably connected with the annular rolling and clamping outer frame 3. The device can ensure the stability of the connection.

[0031] Furthermore, the outer ring guide support precision control roller mounting hole 3-4 of the upper frame 3-1 of the annular rolling locking outer frame 3 is a through hole, and the outer ring guide support precision control roller mounting hole 3-4 of the lower frame 3-2 is a stepped hole. The multiple hole positions of the device can enable the various parts to be fully connected in series.

[0032] Furthermore, one end of the threaded stepped shaft 4-1 is provided with a fastening thread 4-5 and a lock nut 4-6, and is movably connected to the end face of one side of the threaded end cover 4-4 through a friction pair. The friction factor corresponding to the friction pair changes nonlinearly with the locking degree of the lock nut 4-6 and the end face of one side of the threaded end cover 4-4.

[0033] Furthermore, the contact surface between the precision control roller 4-3 and the lock nut 4-6 has an anti-slip pattern, and the anti-slip pattern on the lock nut increases the friction of the contact surface when in use, thereby playing an anti-slip and wear-resistant role; the anti-slip pattern on the precision control roller 4-3 not only increases the friction of the contact surface when in contact, facilitates rolling and reduces wear, but also prevents the precision control roller and the annular rolling groove of the inner ring of the arc groove annular clamp from sliding relative to each other while the annular clamp is specifically clamped.

[0034] Further, such as Figure 2 , 3As shown, precision control scales Ⅰ1-4 are provided on both sides of the annular rolling groove 1-3, and precision control scales Ⅱ3-5 are provided on the inner sides of the upper frame 3-1 and the lower frame 3-2. The precision control scales Ⅱ3-5 and precision control scales Ⅰ1-4 have the same scale range, and the scales correspond one to one. When the cylindrical roller moves clockwise to the right extreme position of the arc-shaped limit slide groove, the zero lines of the precision control scales Ⅱ3-5 and precision control scales Ⅰ1-4 are aligned and overlapped.

[0035] Furthermore, the scale range and limit scale of the precision control scale II3-5 and precision control scale I1-4 respectively correspond to the range and limit position of radial feed of the precision control roller 4-3 rolling the cylindrical roller 2-5 along the annular rolling groove 1-3, thereby achieving the accuracy of workpiece clamping.

[0036] Embodiment 2: Take the use of two sets of the above-mentioned fixtures to assist workpiece processing as an example, and install the above-mentioned two fixtures on two processing machine tools through a specific method, adjust the central axes of the two fixtures, and keep the coaxiality of the two fixtures within a certain accuracy and range.

[0037] In the first case, the left end of the rotating workpiece is fixed: Step 1: The precision control roller 4-3 of the precision control roller assembly 4 is supported by rolling in a clockwise manner, and under the action of the annular rolling and tightening outer frame 3, the internal cylindrical rollers 2-4 are driven to slide to the limit position at one end of the arc-shaped limiting slide groove 1-2; Step 2: Insert the left end of the rotating workpiece into the inner ring 1 of the multi-arc groove annular fixture; Step 3: Roll the precision roller 4-3 of the precision roller assembly 4 in a counterclockwise manner, adjust the relative rotation angle between the annular rolling and tightening outer frame 3 and the inner ring 1 of the multi-arc groove annular fixture, and accurately control the spatial positions of the multiple cylindrical rollers 2-4 in the arc-shaped limit groove 1-2, that is, the radial feed size of the cylindrical rollers 2-4, based on the relative scales and scale ranges between the precision scales Ⅰ1-4 and Ⅱ3-5 of the two, so as to accurately control the clamping state of the workpiece; Step 4: When the relative scales of the precision control scales Ⅰ1-4 and Ⅱ3-5 are adjusted to achieve the best clamping state between the multiple cylindrical rollers 2-4 and the workpiece, the self-locking of the clamping is achieved by adjusting the lock nut 4-6 at one end of the threaded stepped shaft 4-1. At this time, the tool is started again to complete the processing procedure of the workpiece; In the second case, the right end of the rotating workpiece is fixed: Step 1: The precision control roller 4-3 of the precision control roller assembly 4 is supported by rolling in a clockwise manner, and under the action of the annular rolling and tightening outer frame 3, the internal cylindrical rollers 2-4 are driven to slide to the limit position at one end of the arc-shaped limiting slide groove 1-2; Step 2: Insert the right end of the rotating workpiece into the inner ring 1 of the multi-arc groove annular fixture; Step 3: Roll the precision roller 4-3 of the precision roller assembly 4 in a counterclockwise manner, adjust the relative rotation angle between the annular rolling and tightening outer frame 3 and the inner ring 1 of the multi-arc groove annular fixture, and accurately control the spatial positions of the multiple cylindrical rollers 2-4 in the arc-shaped limit groove 1-2, that is, the radial feed size of the cylindrical rollers 2-4, based on the relative scales and scale ranges between the precision scales Ⅰ1-4 and Ⅱ3-5 of the two, so as to accurately control the clamping state of the workpiece; Step 4: When the relative scales of precision control scale Ⅰ1-4 and precision control scale Ⅱ3-5 are adjusted to achieve the best clamping state between the multiple cylindrical rollers 2-4 and the workpiece, the self-locking clamping is achieved by adjusting the lock nut 4-6 at one end of the threaded stepped shaft 4-1. At this time, the tool is started to complete the processing procedure of the workpiece.

Claims

1. A high-precision rotary parts auxiliary processing fixture, characterized in that: The invention comprises four parts: an inner ring of a multi-arc groove annular clamp (1), an annular rolling and tightening outer frame (3), a rolling clamp support assembly (2), and a guide support precision control roller assembly (4). The rolling clamp support assembly (2) is located between the inner ring of the multi-arc groove annular clamp (1) and the annular rolling and tightening outer frame (3), and is movably connected to the inner ring of the multi-arc groove annular clamp (1) and the annular rolling and tightening outer frame (3). The guide support precision control roller assembly (4) is arranged on the outer ring of the annular rolling and tightening outer frame (3), and is movably connected to the annular rolling and tightening outer frame (3).

2. According to claim 1, a high-precision rotary parts auxiliary processing fixture is characterized in that: The inner ring (1) of the multi-arc groove annular clamp has an inner hollow structure, comprising an annular clamp body (1-1), the annular clamp body (1-1) is provided with a plurality of arc-shaped limiting sliding grooves (1-2) inwardly, an annular rolling groove (1-3) is embedded in the outer ring, one end of the arc-shaped limiting sliding groove (1-2) is located in the middle of the annular clamp body (1-1), and the other end radially extends beyond the inner ring of the annular clamp body (1-1); The annular rolling and tightening outer frame (3) comprises an upper frame (3-1) and a lower frame (3-2), wherein the upper frame (3-1) and the lower frame (3-2) are symmetrically distributed, the inner ring is provided with a plurality of rolling clamp support mounting holes (3-3), and the outer ring is provided with a plurality of guide support precision control roller mounting holes (3-4).

3. According to claim 2, a high-precision rotary parts auxiliary processing fixture is characterized in that: The rolling clamp support assembly (2) comprises a symmetrical stepped shaft I (2-1) and a cylindrical roller (2-4), wherein the cylindrical roller (2-4) is fixedly connected to the symmetrical stepped shaft I (2-1) via a key, and the symmetrical stepped shaft I (2-1) is symmetrically provided with bearings I (2-2) at the shaft shoulders at both ends, and is axially limited by providing a first threaded end cover (2-3) threadedly matched with the rolling clamp support mounting hole (3-3), and is movably connected to the annular rolling locking outer frame (3).

4. The high-precision rotary parts auxiliary processing fixture according to claim 2 is characterized in that: The guide support precision control roller assembly (4) comprises a threaded stepped shaft (4-1), a bearing II (4-2), and a precision control roller (4-3); the precision control roller (4-3) is fixedly connected to the threaded stepped shaft (4-1) via a key and is axially matched and precisely matched with the annular rolling groove (1-3); asymmetric shoulders are provided at both ends of the threaded stepped shaft (4-1); bearings II (4-2) are provided at the shoulders at both ends, and a second threaded end cap (4-4) is provided at one end to threadably match the guide support precision control roller mounting hole (3-4) to axially limit the shaft, and is movably connected to the annular rolling locking outer frame (3).

5. According to the high-precision rotating part auxiliary processing fixture of claim 2, the outer ring guide support precision roller mounting hole (3-4) of the upper frame (3-1) is a through hole, and the outer ring guide support precision roller mounting hole (3-4) of the lower frame (3-2) is a stepped hole.

6. The high-precision rotary parts auxiliary processing fixture according to claim 4 is characterized in that: One end of the threaded stepped shaft (4-1) is provided with a fastening thread (4-5) and a lock nut (4-6), and is movably connected to an end face of one side of the second threaded end cover (4-4) via a friction pair, wherein a friction factor corresponding to the friction pair changes nonlinearly with a change in the degree of locking between the lock nut (4-6) and the end face of one side of the second threaded end cover (4-4).

7. According to the high-precision rotary part auxiliary processing fixture of claim 6, the contact surface between the precision control roller (4-3) and the lock nut (4-6) has an anti-slip pattern.

8. The high-precision rotary part auxiliary processing fixture according to claim 6 is characterized in that: Precision control scales I (1-4) are provided on both sides of the annular rolling groove (1-3), and precision control scales II (3-5) are provided on the inner sides of the upper frame (3-1) and the lower frame (3-2). The precision control scales II (3-5) and precision control scales I (1-4) have the same scale range, and the scales correspond one to one. When the cylindrical roller moves clockwise to the right extreme position of the arc-shaped limit slide groove, the zero lines of the precision control scales II and I are aligned and overlapped.

9. The high-precision rotary parts auxiliary processing fixture according to claim 6 is characterized in that: The scale range and limit scale of the precision control scale II (3-5) and the precision control scale I (1-4) respectively correspond to the range and limit position of radial feeding of the precision control roller (4-3) along the annular rolling groove (1-3) rolling the cylindrical roller (2-4).

10. A method for clamping a rotating part using a high-precision rotating part auxiliary processing fixture as described in any one of claims 7 to 9, characterized in that: The following steps are involved: The above-mentioned fixture is used to assist the clamping of the workpiece during machining, and the above-mentioned two sets of fixtures are installed on two processing machine tools, and the central axes of the two fixtures are adjusted to keep the coaxiality of the two fixtures within a certain accuracy and range; (1) Fix the left end of the rotating workpiece: Step 1: The precision control roller (4-3) of the precision control roller assembly (4) is rolled clockwise to guide the support, and the plurality of cylindrical rollers (2-4) inside are driven to slide to the limit position at one end of the arc-shaped limit sliding groove (1-2) under the action of the annular rolling fixed outer frame (3); Step 2: Insert the left end of the rotating workpiece into the inner ring of the multi-arc groove annular fixture (1); Step 3: Roll the precision control roller (4-3) of the precision control roller assembly (4) in a counterclockwise manner to adjust the relative rotation angle between the annular rolling clamp outer frame (3) and the inner ring (1) of the multi-arc groove annular fixture. Based on the relative scale and scale range between the precision control scale I (1-4) and precision control scale II (3-5) of the two, the spatial position of the multiple cylindrical rollers (2-4) in the arc-shaped limit groove (1-2), i.e., the radial feed size of the cylindrical rollers (2-4), is precisely controlled, thereby precisely controlling the clamping state of the workpiece. Step 4: When the relative scales of the precision control scale I (1-4) and the precision control scale II (3-5) are adjusted to achieve the best clamping state between the multiple cylindrical rollers (2-4) and the workpiece, the self-locking clamping is achieved by adjusting the lock nut (4-6) at one end of the threaded stepped shaft (4-1). At this time, the tool is started again to complete the processing procedure of the workpiece; (2) Fix the right end of the rotating workpiece: Step 1: The precision control roller (4-3) of the precision control roller assembly (4) is rolled clockwise to guide the support, and the plurality of cylindrical rollers (2-4) inside are driven to slide to the limit position at one end of the arc-shaped limit sliding groove (1-2) under the action of the annular rolling fixed outer frame (3); Step 2: Insert the right end of the rotating workpiece into the inner ring of the multi-arc groove annular fixture (1); Step 3: Roll the precision control roller (4-3) of the precision control roller assembly (4) in a counterclockwise manner to adjust the relative rotation angle between the annular rolling clamp outer frame (3) and the inner ring (1) of the multi-arc groove annular fixture. Based on the relative scale and scale range between the precision control scale I (1-4) and precision control scale II (3-5) of the two, the spatial position of the multiple cylindrical rollers (2-4) in the arc-shaped limit groove (1-2), i.e., the radial feed size of the cylindrical rollers (2-4), is precisely controlled, thereby precisely controlling the clamping state of the workpiece. Step 4: After the relative scales of the precision control scale I (1-4) and precision control scale II (3-5) are adjusted to achieve the best clamping state between the multiple cylindrical rollers (2-4) and the workpiece, the self-locking clamping is achieved by adjusting the lock nut (4-6) at one end of the threaded stepped shaft (4-1). At this time, the tool is started to complete the processing procedure of the workpiece.

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