A high-precision rotary part auxiliary processing fixture and clamping method

Abstract

The present invention provides a high-precision auxiliary processing fixture for rotating parts and a clamping method, which mainly includes 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 multi-arc groove annular fixture inner ring is a special device for fixing the clamp body, the annular rolling and tightening outer frame is a support and connection device for the clamp body, and drives the annular clamp body inner ring to rotate to achieve workpiece clamping, the guide support precision control roller assembly and the rolling clamp support assembly are the main control mechanisms for achieving precise clamping of the fixture and the clamp body. Through the coordinated action of the above parts and precise adjustment based on the scale of the precision control ruler, the workpiece clamping is ensured to meet the personalized needs of different processing occasions and different workpieces. The use of this device for clamping has the advantages of stable clamping, lightness and reliability, low cost, strong compatibility, and not easy to damage the workpiece. It is widely used in the processing, production, assembly and inspection 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 rotary parts auxiliary processing fixture and a clamping method. Background Art

[0002] Mechanical fixtures are crucial components of machine tools. During machining, the accuracy of workpiece clamping directly impacts the final quality and service life of the part. In current industry, triangular chuck-type fixtures are the most commonly used auxiliary clamping devices for the machining and manufacturing of rotating parts. While they offer advantages such as stable clamping and high reliability, they also present challenges such as easily deforming and damaging the workpiece, affecting machining accuracy, requiring the use of ejectors, and increasing manufacturing costs. With the advancement of science and technology, the domestic manufacturing industry is increasingly demanding high-precision clamping technologies and devices. Summary of the Invention

[0003] In response to 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 provides precision control scales on the upper and lower layers of the annular rolling groove and the annular rolling and tightening outer frame, thereby accurately controlling the annular rolling and tightening rotation angle, achieving precise adjustment of the radial feed size and clamping force of the cylindrical roller, improving the workpiece clamping accuracy, and thereby ensuring the final processing accuracy.

[0004] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a high-precision auxiliary processing fixture for rotating parts, including 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, and 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;

[0006] The annular rolling and tightening outer frame includes an upper frame and a lower frame, and 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.

[0007] The rolling clamp support assembly includes a symmetrical stepped shaft I and a cylindrical roller. The cylindrical roller is fixedly connected to the symmetrical stepped shaft I through a key. The symmetrical stepped shaft I is symmetrically provided with bearings I at the shoulders at both ends, and is axially limited by providing a first threaded end cover that is threadedly matched with the rolling clamp support mounting hole, and is movably connected to the annular rolling locking outer frame.

[0008] The guide support precision roller assembly includes a threaded stepped shaft, a bearing II, and a precision roller. The precision 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 provided at the shoulders at both ends, and a second threaded end cover is provided at one end to thread the guide support precision roller mounting hole to limit the axial position, and it is movably connected to the annular rolling locking outer frame.

[0009] 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.

[0010] 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.

[0011] The contact surface between the precision control roller and the lock nut is provided with anti-skid patterns.

[0012] 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 racks. The precision control scales II and precision control scales 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 slide groove, the zero lines of the precision control scales II and precision control scales I are aligned and overlap.

[0013] 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 feed of the precision control roller rolling the cylindrical roller along the annular rolling groove.

[0014] A method for clamping a rotating part using the high-precision rotating part auxiliary processing fixture includes the following steps:

[0015] The above fixture is used to assist the clamping of the workpiece during machining, and the two sets of fixtures are installed on two processing machine tools. The center axes of the two fixtures are adjusted and the coaxiality of the two fixtures is maintained within a certain accuracy and range;

[0016] Fix the left end of the rotating workpiece:

[0017] Step 1: The precision roller of the precision roller assembly is guided and supported in a clockwise manner. Under the action of the annular rolling and tightening outer frame, the internal cylindrical rollers are driven to slide to the limit position at one end of the arc-shaped limit groove.

[0018] Step 2: Insert the left end of the rotating workpiece into the inner ring of the multi-arc groove annular fixture;

[0019] Step 3: Roll the precision roller of the precision roller assembly in a counterclockwise direction to adjust the relative rotation angle between the annular rolling clamping outer frame and the inner ring of the multi-arc groove annular fixture. Based on the relative scale and scale range between the precision scale I and precision scale II, the spatial position of the multiple cylindrical rollers in the arc-shaped limit slot is precisely controlled, that is, the radial feed size of the cylindrical rollers, thereby precisely controlling the clamping state of the workpiece.

[0020] Step 4: After adjusting the relative scales of precision scale I and precision scale II to achieve the best clamping state between the multiple cylindrical rollers and the workpiece, adjust the lock nut at one end of the threaded stepped shaft to achieve self-locking clamping. At this time, start the tool again to complete the workpiece processing procedure;

[0021] Fix the right end of the rotating workpiece:

[0022] Step 1: The precision roller of the precision roller assembly is guided and supported in a clockwise manner. Under the action of the annular rolling and tightening outer frame, the internal cylindrical rollers are driven to slide to the limit position at one end of the arc-shaped limit groove.

[0023] Step 2: Insert the right end of the rotating workpiece into the inner ring of the multi-arc groove annular fixture;

[0024] Step 3: Roll the precision roller of the precision roller assembly in a counterclockwise direction to adjust the relative rotation angle between the annular rolling clamping outer frame and the inner ring of the multi-arc groove annular fixture. Based on the relative scale and scale range between the precision scale I and precision scale II, the spatial position of the multiple cylindrical rollers in the arc-shaped limit slot is precisely controlled, that is, the radial feed size of the cylindrical rollers, thereby precisely controlling the clamping state of the workpiece.

[0025] Step 4: After adjusting the relative scales of precision scale I and precision scale II to achieve the best clamping state between multiple cylindrical rollers and the workpiece, adjust the lock nut at one end of the threaded stepped shaft to achieve self-locking clamping. At this time, start the tool to complete the workpiece processing procedure.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention provides precise control scales on the upper and lower layers of the annular rolling groove and the annular rolling and tightening outer frame, which can accurately control the rotation angle of the annular rolling and tightening, thereby achieving precise adjustment of the radial feed size and clamping force of the cylindrical roller, improving the workpiece clamping accuracy, and thus ensuring the final processing accuracy.

[0028] 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 it can still maintain a good clamping state during long-term high-intensity use.

[0029] 3. The present invention adopts anti-slip roller to drive the radial movement of cylindrical roller to adjust the clamping and loosening of workpiece, and adopts micro lock nut to fix and maintain the clamping state of workpiece. The operation is convenient and fast, and the fixture structure is lightweight and the design is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and examples.

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

[0032] Figure 2 This is a schematic diagram of the structure of the inner ring of the multi-arc groove annular fixture.

[0033] Figure 3 This is a structural diagram of the annular rolling tightening outer frame.

[0034] Figure 4 Schematic diagram of the exploded structure of the guide support precision roller assembly.

[0035] Figure 5 Schematic diagram of the exploded structure of the rolling clamp support assembly.

[0036] 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, and the guide support precision control roller assembly 4;

[0037] Ring 1-1, arc-shaped limit slide 1-2, ring rolling groove 1-3, precision control scale I 1-4;

[0038] Symmetrical stepped shaft I 2-1, bearing I 2-2, first threaded end cover 2-3, cylindrical roller 2-4;

[0039] 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;

[0040] 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

[0041] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0042] Example 1:

[0043] like Figure 1-5 As shown, Figure 1 As shown, a high-precision auxiliary processing fixture for rotating parts is used. The present invention takes the inner ring 1 of the multi-arc groove annular fixture 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 groove 1-3 of the inner ring 1 of the multi-arc groove annular fixture, and is fixed by the annular rolling and tightening outer frame 3.

[0044] Furthermore, the annular rolling clamping outer frame 3, serving as a fixing and connecting device for the clamp body, cooperates with the guide support precision roller assembly 4 to precisely control the rotation of the annular rolling clamping outer frame through the precision roller 4-3, causing one end of the arc-shaped limit groove 1-2 of the inner ring 1 of the multi-arc groove annular clamp to extend outward to clamp the workpiece. The multi-arc groove annular clamp inner ring 1, serving as the main body of this device, is provided with an annular rolling groove 1-3 and multiple arc-shaped limit grooves 1-2 to connect the various parts in series, and can enable multiple cylindrical rollers 2-4 to slide within the arc-shaped limit groove 1-2 and multiple precision rollers 4-3 to roll within the annular rolling groove 1-3. The annular rolling clamping outer frame 3 is tightly integrated with the guide support precision roller assembly 4 to form an integrated structural design, which is not only easy to install and operate, but also does not require tedious adjustments before installation. The rolling clamp support assembly 2 serves as the clamp body drive component, and realizes the sliding of the cylindrical rollers 2-4 by manipulating the precision roller 4-3 drive.

[0045] Further, such as Figure 2As shown, the inner ring 1 of the multi-arc groove annular clamp is a hollow structure on the inner side, including an annular clamp body 1-1, and the annular clamp body 1-1 is provided with multiple 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 to control the sliding of the cylindrical rollers 2-4 by regulating the precision control rollers 4-3; 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 slot 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. When the cylindrical roller 2-4 is located at one end of the middle of the arc-shaped limit slot 1-2, it is at its limit position, and the entire annular clamp body is in an inoperative state. The other end of the arc-shaped limit slot 1-2 does not extend beyond the limit. The cylindrical roller 2-4 slides along the slot from the limit position, causing the other end of the arc-shaped limit slot 1-2 to gradually extend beyond the limit. The arc-shaped limit slot 1-2 not only clamps the workpiece but also reserves a certain position to fully connect the three parts of the multi-arc-groove annular clamp inner ring 1, the rolling clamp support assembly 2, and the annular rolling clamp outer frame 3. The slot interface positions are also arranged in a regular manner to effectively avoid motion interference during operation.

[0046] Further, such as Figure 3 As shown, the annular rolling clamping outer frame 3 comprises an upper frame 3-1 and a lower frame 3-2, which are symmetrically arranged. The inner ring is provided with multiple mounting holes 3-3 for the rolling clamping body, and the outer ring is provided with multiple mounting holes 3-4 for the guide support precision rollers. This device can be connected to other devices through the inner and outer mounting holes of the upper and lower frames 3-1, 3-2, to achieve the fixation and connection of the entire clamping body.

[0047] 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. The cylindrical roller 2-4 is fixedly connected to the symmetrical stepped shaft I2-1 through 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 clamping outer frame 3, and is movably connected to the annular rolling clamping outer frame 3. This device serves as a transmission device for the clamp, ensuring the stability and reliability of the transmission.

[0048] Further, such as Figure 4As shown, the guide support precision roller assembly 4 includes a threaded stepped shaft 4-1, a bearing II 4-2, and a precision roller 4-3. The precision roller 4-3 is fixedly connected to the threaded stepped shaft 4-1 by a key, and is precisely matched axially 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. By arranging bearings II 4-2 at the shoulders at both ends and arranging a threaded end cover 4-4 at one end to threadably match the axial limit with the outer ring guide support precision roller mounting hole 3-4 of the annular rolling and tightening outer frame 3, and movably connected to the annular rolling and tightening outer frame 3, the device can ensure the stability of the connection.

[0049] Furthermore, the outer ring guide support precision roller mounting hole 3-4 of the upper frame 3-1 of the annular rolling and tightening outer frame 3 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. The multiple hole positions of the device can enable the various parts to be fully connected in series.

[0050] 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 degree of locking between the lock nut 4-6 and the end face of one side of the threaded end cover 4-4.

[0051] Furthermore, the contact surface between the precision control roller 4-3 and the lock nut 4-6 has an anti-slip pattern. The anti-slip pattern on the lock nut increases the friction of the contact surface during 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 during 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 clamped.

[0052] Further, such as Figure 2 、 3 As 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 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 I1-4 are aligned and overlap.

[0053] Furthermore, the scale range and limit scale of the precision scale II3-5 and the precision scale I1-4 respectively correspond to the range and limit position of radial feed of the precision roller 4-3 rolling the cylindrical roller 2-5 along the annular rolling groove 1-3, thereby achieving the accuracy of workpiece clamping.

[0054] Example 2:

[0055] 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.

[0056] In the first case, the left end of the rotating workpiece is fixed:

[0057] Step 1: The precision control roller 4-3 of the precision control roller assembly 4 is guided and supported in a clockwise manner. Under the action of the annular rolling and tightening outer frame 3, the internal cylindrical rollers 2-4 are driven to slide to the extreme position at one end of the arc-shaped limiting groove 1-2.

[0058] Step 2: Insert the left end of the rotating workpiece into the inner ring 1 of the multi-arc groove annular fixture;

[0059] Step 3: Roll the precision roller 4-3 of the precision roller assembly 4 in a counterclockwise direction to 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. Based on the relative scales and scale ranges between the precision scales Ⅰ1-4 and precision scales Ⅱ3-5, the spatial positions of the multiple cylindrical rollers 2-4 in the arc-shaped limiting groove 1-2, i.e., the radial feed size of the cylindrical rollers 2-4, are precisely controlled to thereby precisely control the clamping state of the workpiece.

[0060] Step 4: After adjusting the relative scales of the precision scales I1-4 and II3-5 to achieve the best clamping state between the multiple cylindrical rollers 2-4 and the workpiece, adjust the lock nut 4-6 at one end of the threaded stepped shaft 4-1 to achieve self-locking clamping. At this time, start the tool again to complete the workpiece processing procedure.

[0061] In the second case, the right end of the rotating workpiece is fixed:

[0062] Step 1: The precision control roller 4-3 of the precision control roller assembly 4 is guided and supported in a clockwise manner. Under the action of the annular rolling and tightening outer frame 3, the internal cylindrical rollers 2-4 are driven to slide to the extreme position at one end of the arc-shaped limiting groove 1-2.

[0063] Step 2: Insert the right end of the rotating workpiece into the inner ring 1 of the multi-arc groove annular fixture;

[0064] Step 3: Roll the precision roller 4-3 of the precision roller assembly 4 in a counterclockwise direction to 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. Based on the relative scales and scale ranges between the precision scales Ⅰ1-4 and precision scales Ⅱ3-5, the spatial positions of the multiple cylindrical rollers 2-4 in the arc-shaped limiting groove 1-2, i.e., the radial feed size of the cylindrical rollers 2-4, are precisely controlled to thereby precisely control the clamping state of the workpiece.

[0065] Step 4: When the relative scales of the precision 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 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); 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, and 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); The guide support precision roller assembly (4) comprises a threaded stepped shaft (4-1), a bearing II (4-2), and a precision roller (4-3). The precision roller (4-3) is fixedly connected to the threaded stepped shaft (4-1) via a key and is precisely matched axially with the annular rolling groove (1-3). Asymmetric shoulders are provided at both ends of the threaded stepped shaft (4-1). Bearing II (4-2) is 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 roller mounting hole (3-4) to limit axial position, and the precision roller is movably connected to the annular rolling fixed outer frame (3).

2. A high-precision rotary parts auxiliary processing fixture according to claim 1, 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 fixed outer frame (3).

3. 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.

4. The high-precision rotary parts auxiliary processing fixture according to claim 3 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 cap (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 cap (4-4).

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

6. The high-precision rotary parts auxiliary processing fixture according to claim 4, 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 scale 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 precision control scale I are aligned and overlapped.

7. The high-precision rotary part auxiliary processing fixture according to claim 6, 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 feed of the precision control roller (4-3) rolling the cylindrical roller (2-4) along the annular rolling groove (1-3).

8. A method for clamping a rotating part using a high-precision rotating part auxiliary processing fixture according to any one of claims 6 to 7, characterized in that: The following steps are involved: The above-mentioned fixture is used to assist the clamping of the workpiece during machining, and two sets of the above-mentioned fixtures are installed on two processing machine tools. The central axes of the two fixtures are adjusted, and the coaxiality of the two fixtures is maintained 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, and driven by the annular rolling fixed outer frame (3) to slide the internal cylindrical rollers (2-4) to the extreme position at one end of the arc-shaped limit groove (1-2); 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 roller (4-3) of the precision roller assembly (4) in a counterclockwise direction to adjust the relative rotation angle between the annular rolling clamping 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 scale I (1-4) and precision 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) is precisely controlled, i.e., the radial feed size of the cylindrical rollers (2-4), thereby precisely controlling the clamping state of the workpiece. Step 4: After adjusting the relative scales of the precision scale I (1-4) and precision scale II (3-5) to achieve the best clamping state between the multiple cylindrical rollers (2-4) and the workpiece, adjust the lock nut (4-6) at one end of the threaded stepped shaft (4-1) to achieve self-locking clamping. At this time, start the tool again to complete the workpiece processing procedure; (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, and driven by the annular rolling fixed outer frame (3) to slide the internal cylindrical rollers (2-4) to the extreme position at one end of the arc-shaped limit groove (1-2); 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 roller (4-3) of the precision roller assembly (4) in a counterclockwise direction to adjust the relative rotation angle between the annular rolling clamping 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 scale I (1-4) and precision 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) is precisely controlled, i.e., the radial feed size of the cylindrical rollers (2-4), thereby precisely controlling the clamping state of the workpiece. Step 4: After adjusting the relative scales of precision scale I (1-4) and precision scale II (3-5) to achieve the best clamping state between the multiple cylindrical rollers (2-4) and the workpiece, adjust the lock nut (4-6) at one end of the threaded stepped shaft (4-1) to achieve self-locking clamping. At this time, start the tool to complete the workpiece processing procedure.

Images