Cutting auxiliary clamp for composite material NOL ring

Abstract

The utility model relates to the technical field of cutting sample preparation equipment of a composite material NOL annular sample, and discloses a cutting auxiliary clamp of a composite material NOL ring, which is matched with a cutting tool for use, and comprises a base, a first clamping assembly, a second clamping assembly and a feeding assembly, the cutting tool is located between the first clamping assembly and the second clamping assembly. Wherein the first clamping assembly, the second clamping assembly and the feeding assembly each comprise a supporting arm and a chuck, one end of each supporting arm is connected with the base, the supporting arms and the base are fixed through a locking mechanism, the other ends of the supporting arms are fixedly connected with the chucks, the chucks clamp the NOL rings, the dial is located below the supporting arms of the feeding assembly, and the other ends of the supporting arms are fixedly connected with the chucks. And the other end of the support arm of the feeding assembly extends out of the dial, so that the NOL ring can be cut in an auxiliary manner.

Description

Technical Field

[0001] This utility model relates to the technical field of cutting and sample preparation equipment for composite material NOL ring specimens, specifically to a cutting auxiliary fixture for composite material NOL rings.

[0002] Background technology.

[0003] Interlaminar shear strength is an important indicator for evaluating the performance of composite materials, reflecting the interfacial strength between the matrix and the reinforcement. Referring to the short beam shear method standards ASTM 2344 and GB / T 1458-2008, interlaminar shear strength can be assessed by testing NOL (unidirectional fiber wound composite ring) specimens. However, cutting and preparing composite NOL rings is a technical challenge, especially in the absence of specialized equipment for precise cutting. The aforementioned standards do not provide specific cutting methods, and the actual cutting process can lead to specimen slippage, deformation, and even damage, affecting the accuracy and efficiency of the test results.

[0004] Currently, most NOL rings are cut manually, but this method is dangerous and lacks precision and efficiency. Therefore, designing auxiliary fixtures for composite material NOL rings is of great significance. Utility Model Content

[0005] The purpose of this invention is to overcome the problems in the prior art and provide a cutting auxiliary fixture for composite material NOL rings, which can assist in cutting NOL rings.

[0006] This utility model provides a cutting auxiliary fixture for composite material NOL rings, which is used in conjunction with a cutting tool. The auxiliary fixture includes: a base, a first clamping assembly, a second clamping assembly, and a feed assembly. A scale is fixed around the base, and the scale is circular. The cutting tool is located between the first clamping assembly and the second clamping assembly. The first clamping assembly, the second clamping assembly, and the feed assembly each include: a support arm and a chuck. One end of the support arm is connected to the base, and the support arm and the base are fixed together by a locking mechanism. The other end of the support arm is fixed to the chuck, which holds the NOL ring. The scale is located below the support arm of the feed assembly, and the other end of the support arm of the feed assembly extends out of the scale.

[0007] Optionally, the clamp includes: a first electromagnetic clamp plate, fixed to the other end of the support arm; and a second electromagnetic clamp plate, aligned with the first electromagnetic clamp plate. The first electromagnetic clamp plate and the second electromagnetic clamp plate are connected by a limiting post. The first electromagnetic clamp plate is fixed to the limiting post, and the second electromagnetic clamp plate is slidably connected to the limiting post.

[0008] Optionally, a spring is fitted onto the limiting post, with the spring located between the first electromagnetic clamp and the second electromagnetic clamp.

[0009] Optionally, the limiting post is located near the bottom of the first electromagnetic clamp and the second electromagnetic clamp. A support platform is fixed on the side of the first electromagnetic clamp facing the second electromagnetic clamp. The support platform is located above the limiting post, and the NOL ring abuts against the upper end of the support platform.

[0010] Optionally, rubber pads are fixed to the opposite sides of the first electromagnetic clamp and the second electromagnetic clamp.

[0011] Optionally, a track is fixed to the side of the first electromagnetic clamp of the first clamping assembly. The track is set parallel to the limiting post, and a limiting plate slides in the track. The NOL ring abuts against the limiting plate.

[0012] Optionally, an extension plate is vertically fixed to the side of the first electromagnetic clamp, and the track is fixed to the side of the first electromagnetic clamp and the extension plate.

[0013] Optionally, a spindle is rotatably connected to the base, and a bushing is fixed to one end of the support arm of both the first clamping assembly and the second clamping assembly. The bushing of the first clamping assembly is rotatably connected to the spindle, the bushing of the second clamping assembly is fixed to the base, and one end of the support arm of the feed assembly is fixed to the spindle.

[0014] Optionally, the locking mechanism includes a coupling and an electromagnet, the electromagnet being fixed on the spindle and capable of attracting the bushings, the coupling being located between the two bushings and sleeved on the spindle.

[0015] Optionally, the dial is fixed to the support arm of the feed assembly.

[0016] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0017] This utility model provides a cutting auxiliary fixture for composite material NOL rings. A dial fixed to the periphery of the base, along with a first clamping assembly, a second clamping assembly, and a feed assembly, stably clamps and locks the cutting position of the NOL ring. Specifically, the first clamping assembly, the second clamping assembly, and the feed assembly, centered on the base, clamp the NOL ring at three positions using various clamps. This prevents slippage and deformation of the sample during cutting. The clamps of the first and second clamping assemblies respectively hold the NOL ring at positions on both sides of the cutting tool. The arm of the feed assembly extends out from the dial, and the clamp of the feed assembly simultaneously holds the NOL ring. Rotating the arm of the feed assembly allows the feed assembly to feed at a preset angle, thereby causing the NOL ring to rotate at a fixed angle. This allows the cutting tool to cut NOL ring strips of equal length. Simultaneously, the length of the NOL ring strip can be adjusted by adjusting the position of the first clamping assembly and the feed angle of the feed assembly. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the uncut state of a cutting auxiliary fixture for a composite material NOL ring provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the cutting state of a cutting auxiliary fixture for a composite material NOL ring provided in an embodiment of this utility model;

[0020] Figure 3 A schematic diagram of the structure of the first clamping assembly provided in an embodiment of this utility model;

[0021] Figure 4 A front view of the first clamping assembly chuck provided in an embodiment of this utility model;

[0022] Figure 5 A top view of the first clamping assembly chuck provided in an embodiment of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the second clamping assembly provided in an embodiment of the present utility model;

[0024] Figure 7 This is a front view of the chuck of the second clamping assembly provided in an embodiment of the present invention;

[0025] Figure 8 A top view of the chuck of the second clamping assembly provided in an embodiment of this utility model;

[0026] Figure 9 A schematic diagram of the connection structure of the base, spindle, and locking mechanism provided in an embodiment of this utility model;

[0027] Figure 10 A cut segment of the NOL ring provided in this embodiment of the utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Base; 2. Dial; 3. First clamping assembly; 4. Second clamping assembly; 5. Feed assembly; 6. Support arm; 7. Chuck; 70. First electromagnetic clamp; 71. Second electromagnetic clamp; 72. Limiting post; 73. Spring; 74. Support platform; 75. Rubber pad; 76. Track; 77. Limiting plate; 78. Extension plate; 8. Mandrel; 9. Bushing; 10. Coupling; 11. Cutting tool. Detailed Implementation

[0030] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The present invention will be described below through several specific embodiments. To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numerals in each drawing.

[0033] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the uncut state of a cutting auxiliary fixture for composite material NOL rings provided in an embodiment of this utility model. Figure 2 A schematic diagram of the cutting state of a cutting auxiliary fixture for a composite material NOL ring provided in an embodiment of this utility model is shown below. Figure 1 and Figure 2As shown, this utility model provides a cutting auxiliary fixture for composite material NOL rings, used in conjunction with a cutting tool 11. The auxiliary fixture includes: a base 1, a first clamping assembly 3, a second clamping assembly 4, and a feed assembly 5. The base 1 serves as the basic support for the entire fixture and is typically made of high-strength metal (such as aluminum alloy or steel) to ensure stability. A scale 2 is fixed around the base 1 for precise control of the cutting angle or position. The scale 2 is annular and has angle graduations (such as 0°~360° divisions). A vernier caliper can be equipped to improve reading accuracy. In conjunction with the feed assembly 5, it achieves the rotational positioning of the NOL ring, ensuring that the cutting tool 11 feeds along a preset angle. The cutting tool 11 is located between the first clamping assembly 3 and the second clamping assembly 4. The two clamping assemblies are symmetrically distributed, forming a two-point fixation for the NOL ring, enhancing stability. The cutting tool 11 is located between the two. The first clamping assembly 3, the second clamping assembly 4, and the feed assembly 5 all include: a support arm 6 and a chuck 7. One end of the support arm 6 is connected to the base 1, and the support arm 6 and the base 1 are fixed together by a locking mechanism. The locking mechanism can fix the position of the support arm 6 to ensure no displacement during the cutting process. The other end of the support arm 6 is fixedly connected to the chuck 7, which clamps the NOL ring. Anti-slip clamps (such as rubber pads or hydraulic clamping mechanisms) are used to firmly clamp the NOL ring and prevent slippage or vibration during cutting. The scale 2 is located below the support arm 6 of the feed assembly 5, and the other end of the support arm 6 of the feed assembly 5 extends out of the scale 2, which is convenient for the operator to observe and adjust the angle. It can be equipped with a worm gear mechanism or servo motor drive to achieve fine-tuning of the feed. The feed assembly 5 controls the rotational feed movement of the NOL ring to achieve precise indexing cutting.

[0034] The overall workflow is as follows:

[0035] Clamping stage: Place the NOL ring between the chucks 7 of the first clamping assembly 3 and the second clamping assembly 4, adjust the support arm 6 and lock it;

[0036] Angle setting: Rotate the arm of the feed assembly 5 and determine the cutting angle through the dial 2 (e.g., cut once every 30°).

[0037] Cutting operation: Start the cutting tool 11 (such as a diamond grinding wheel or laser cutting head), and feed the tool along the gap between the first clamping assembly 3 and the second clamping assembly 4 to complete the circular cut.

[0038] This utility model provides a cutting auxiliary fixture for composite material NOL rings. A dial fixed to the periphery of the base, along with a first clamping assembly, a second clamping assembly, and a feed assembly, stably clamps and locks the cutting position of the NOL ring. Specifically, the first clamping assembly, the second clamping assembly, and the feed assembly, centered on the base, clamp the NOL ring at three positions using various clamps. This prevents slippage and deformation of the sample during cutting. The clamps of the first and second clamping assemblies respectively hold the NOL ring at positions on both sides of the cutting tool 11. The support arm of the feed assembly extends out from the dial, and the clamp of the feed assembly simultaneously holds the NOL ring. Rotating the support arm of the feed assembly allows the feed assembly to feed at a preset angle, thereby causing the NOL ring to rotate at a fixed angle. This allows the cutting tool 11 to cut NOL ring strips of equal length. Simultaneously, the length of the NOL ring strip can be adjusted by adjusting the position of the first clamping assembly and the feed angle of the feed assembly.

[0039] refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 This is a schematic diagram of the structure of the first clamping assembly provided in an embodiment of the present utility model. Figure 4 This is a front view of the first clamping assembly chuck provided in an embodiment of the present invention. Figure 5 A top view of the first clamping assembly chuck provided in an embodiment of the present invention, as shown below. Figure 3 , Figure 4 and Figure 5 As shown, the clamp 7 includes: a first electromagnetic clamp 70, fixed to the other end of the support arm 6; and a second electromagnetic clamp 71, aligned with the first electromagnetic clamp 70. The outer shells of the first electromagnetic clamp 70 and the second electromagnetic clamp 71 can be made of high-strength aluminum alloy, with embedded electromagnetic coils (generating a magnetic field after being energized). The first electromagnetic clamp 70 and the second electromagnetic clamp 71 are connected by limiting posts 72. The first electromagnetic clamp 70 is fixed to the limiting posts 72 and rigidly connected to the end of the support arm 6, serving as the static reference plane of the clamping system. The second electromagnetic clamp 71 is slidably connected to the limiting posts 72 to ensure that the second electromagnetic clamp 71 slides in a straight line and avoids deflection. In this embodiment, multiple limiting posts 72 can be provided, arranged in parallel. A mechanical stop is provided at the end of the limiting posts 72 to prevent excessive separation or collision of the clamps, adapting to NOL rings of different thicknesses. It is energized synchronously with the first electromagnetic clamp 70, using magnetic attraction to clamp the NOL ring. When not energized, the second electromagnetic clamp 71 can be manually slid to adjust the initial spacing.

[0040] The chuck 7 adopts electromagnetic clamping technology, which is specially designed for non-destructive clamping of composite material NOL rings. It achieves rapid clamping and loosening through electromagnetic force, while avoiding surface damage or stress concentration caused by mechanical clamping. When the first electromagnetic clamp 70 and the second electromagnetic clamp 71 are working, the first electromagnetic clamp 70 and the second electromagnetic clamp 71 close under the action of magnetic force to achieve the purpose of clamping the NOL ring. After the power is turned off, the first electromagnetic clamp 70 and the second electromagnetic clamp 71 separate, and the NOL ring can be removed.

[0041] Refer again Figure 4 and Figure 5 A spring 73 is sleeved on the limiting post 72. The limiting post 72 not only restricts the sliding range of the second electromagnetic clamp 71, but also ensures that the spring 73 is compressed axially to avoid deflection. A retaining ring or threaded end cap can be provided at the end of the limiting post 72 to prevent the spring 73 from falling off. The spring 73 is located between the first electromagnetic clamp 70 and the second electromagnetic clamp 71.

[0042] After being powered on, the electromagnetic force overcomes the elastic force of the spring 73, causing the second electromagnetic clamp 71 to clamp the NOL ring against the first electromagnetic clamp 70. After the first electromagnetic clamp 70 and the second electromagnetic clamp 71 are de-energized, the elastic force of the spring 73 pushes the second electromagnetic clamp 71 back, quickly releasing the NOL ring and improving operating efficiency. During the energized clamping process, the spring 73 can absorb some vibration or impact, preventing rigid clamping from damaging the surface of the composite material NOL ring. By adjusting the compression of the spring 73, the initial clamping force can be controlled to adapt to NOL rings of different materials or thicknesses.

[0043] refer to Figure 6 , Figure 7 and Figure 8 , Figure 6 This is a schematic diagram of the structure of the second clamping assembly provided in an embodiment of the present invention. Figure 7 This is a front view of the clamping head of the second clamping assembly provided in an embodiment of the present invention. Figure 8 A top view of the chuck of the second clamping assembly provided in an embodiment of this utility model, as shown below. Figure 6 , Figure 7 and Figure 8 As shown, the limiting post 72 is located near the bottom of the first electromagnetic clamping plate 70 and the second electromagnetic clamping plate 71. A bearing platform 74 is fixed on the side of the first electromagnetic clamping plate 70 facing the second electromagnetic clamping plate 71. The bearing platform 74 is located above the limiting post 72. The NOL ring abuts against the upper end of the bearing platform 74, forming a dual protection mechanism of "lower layer limiting guide (limiting post 72 + spring 73) + upper layer bearing positioning (bearing platform 74)" to ensure that the clamping process is both stable and precise.

[0044] The support platform 74 is used to support the NOL ring and prevent the NOL ring from contacting the limiting post 72 and the spring 73, thus preventing unnecessary damage.

[0045] Refer again Figure 7 and Figure 8 Rubber pads 75 are fixed to the opposite sides of the first electromagnetic clamp 70 and the second electromagnetic clamp 71, respectively.

[0046] High-elastic rubber pads are provided at the contact points between the first electromagnetic clamp 70 and the second electromagnetic clamp 71 and the NOL ring. The rubber pads 75 can act as a buffer to prevent damage to the NOL ring.

[0047] Refer again Figure 4 and Figure 5 The first electromagnetic clamping plate 70 of the first clamping assembly 3 is fixed with a track 76 on its side. The base of the track 76 can be made of GCr15 bearing steel (hardness HRC62±1), and the sliding surface can be a hard chrome plated layer (thickness 20μm, Ra≤0.05μm). A sealing strip such as fluororubber (temperature resistance -40~200℃) can also be added. The track 76 is set parallel to the limiting post 72. The track 76 slides and fits with the limiting plate 77. The NOL ring abuts against the limiting plate 77. The base of the limiting plate 77 can be made of tungsten carbide (YG8, hardness HRA90), and the contact surface material is CVD diamond coating (thickness 10μm). The back plate can be made of titanium alloy TC4 (weight reduction 30%).

[0048] Track 76 provides support for the linear movement of the limiting plate 77 along track 76. During the cutting process, after the NOL ring has been notched, the limiting plate 77 is pushed along track 76 to the side of the NOL stage, so that the cut surface of the NOL ring contacts the limiting plate 77. Based on this, by adjusting the relative positions of the first clamping assembly 3, the second clamping assembly 4, and the feed assembly 5, efficient batch cutting of NOLs can be achieved.

[0049] Specifically, an extension plate 78 is vertically fixed to the side of the first electromagnetic clamp 70 to form an "L-shaped" composite support, and a track 76 is fixed to the side of the first electromagnetic clamp 70 and the extension plate 78.

[0050] refer to Figure 9 , Figure 9 A schematic diagram of the connection structure of the base, spindle, and locking mechanism provided in an embodiment of this utility model is shown below. Figure 9 As shown, a spindle 8 is rotatably connected to the base 1. A bushing 9 is fixed to one end of the support arm 6 of the first clamping assembly 3 and the second clamping assembly 4. The bushing 9 of the first clamping assembly 3 is rotatably connected to the spindle 8. The bushing 9 of the second clamping assembly 4 is fixed to the base 1. The position of the second clamping assembly 4 is fixed. One end of the support arm 6 of the feed assembly 5 is fixed to the spindle 8. The feed position of the feed assembly 5 is adjusted as the spindle 8 rotates.

[0051] Specifically, the locking mechanism includes a coupling 10 and an electromagnet. The electromagnet is fixed on the spindle 8 and can attract the bushing 9. The coupling 10 is located between the two bushings 9 and is sleeved on the spindle 8.

[0052] The base 1 and the bushing 9 of the second clamping assembly 4 are a single unit. The bushing 9 of the first clamping assembly 3 and the bushing 9 of the second clamping assembly 4 can also form a single unit via the coupling 10. This means that the relative positions of the bushing 9 of the first clamping assembly 3 and the bushing 9 of the second clamping assembly 4 can be adjusted via the coupling 10. When the coupling 10 is working, the positions of the two bushings 9 are fixed. In other words, the bushings 9, the base 1, and the mandrel 8 are also a single unit when the coupling 10 is in operation. The mandrel 8 and the bushing 9 are also a single unit via the electromagnet, which is equivalent to the mandrel 8, the bushing 9, and the base 1 forming a single unit. Therefore, the positions of the first clamping assembly 3, the second clamping assembly 4, and the feed assembly 5 are fixed at this time, ensuring that samples of the same size can be obtained during cutting.

[0053] Specifically, the dial 2 is fixed to the support arm 6 of the feed assembly 5.

[0054] The complete workflow is as follows:

[0055] ① Adjust the relative positions of the first clamping assembly 3, the second clamping assembly 4, and the feed assembly 5 (by activating the electromagnet and coupling 10, the support 1, bushing 9, and spindle 8 form a single unit, preventing relative rotation; the first clamping assembly 3 and the second clamping assembly 4 are located on both sides of the cutting tool 11, with the center point of the clamp on the extension line of the cutting tool 11's movement path; the distance from the right end face of the chuck 7 of the first clamping assembly 3 to the NOL ring cutting surface is the sample length dimension L, such as... Figure 1 (As shown).

[0056] ② The NOL ring is clamped on the chuck 7 of the first clamping assembly 3, the second clamping assembly 4 and the feed assembly 5, and the first electromagnetic clamping plate 70 and the second electromagnetic clamping plate 71 are energized to generate magnetism, thus completing the clamping of the NOL ring on the chuck 7.

[0057] ③ Bring the cutting tool 11 close to the NOL ring to complete the initial cutting of the sample.

[0058] ④ De-energize the electromagnet of mandrel 8 to disable its engagement function. Using the relative position of the support arm 6 of the second clamping assembly 4 on the dial 2 as the zero point, rotate the feed assembly 5 around mandrel 8 by the corresponding angle (the arc corresponding to the sample length L is the required rotation angle, e.g., ...). Figure 2 (As shown).

[0059] ⑤ Power on the electromagnet to activate the mandrel 8, bringing the cutting tool 11 close to the NOL ring, thus completing the first sample taking. Figure 10 As shown.

[0060] ⑥ The electromagnet of the spindle 8 is de-energized, the attraction function of the spindle 8 is turned off, and the limiting plate 77 is pushed along the track 76 to the side of the NOL stage, so that the feed assembly 5 rotates around the spindle 8 until the cutting surface of the NOL ring contacts the limiting plate 77.

[0061] ⑦ Repeat step ⑤ to complete the batch cutting of the sample pieces.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cutting auxiliary fixture for composite material NOL rings, characterized in that, The auxiliary fixture, used in conjunction with the cutting tool (11), includes: a base (1), a first clamping assembly (3), a second clamping assembly (4), and a feed assembly (5). A scale (2) is fixed around the base (1), and the scale (2) is annular. The cutting tool (11) is located between the first clamping assembly (3) and the second clamping assembly (4). The first clamping assembly (3), the second clamping assembly (4), and the feed assembly (5) each include: a support arm (6) and a chuck (7). One end of the support arm (6) is connected to the base (1), and the support arm (6) and the base (1) are fixed together by a locking mechanism. The other end of the support arm (6) is fixed to the chuck (7), which holds the NOL ring. The dial (2) is located below the support arm (6) of the feed assembly (5), and the other end of the support arm (6) of the feed assembly (5) extends out of the dial (2).

2. The cutting auxiliary fixture for composite material NOL rings as described in claim 1, characterized in that, The chuck (7) includes: The first electromagnetic clamp (70) is fixed to the other end of the support arm (6); The second electromagnetic clamp (71) is aligned with the first electromagnetic clamp (70). The first electromagnetic clamp (70) and the second electromagnetic clamp (71) are connected by a limiting post (72). The first electromagnetic clamp (70) is fixed to the limiting post (72), and the second electromagnetic clamp (71) is slidably connected to the limiting post (72).

3. The cutting auxiliary fixture for composite material NOL rings as described in claim 2, characterized in that, A spring (73) is sleeved on the limiting post (72), and the spring (73) is located between the first electromagnetic clamp (70) and the second electromagnetic clamp (71).

4. The cutting auxiliary fixture for composite material NOL rings as described in claim 2, characterized in that, The limiting post (72) is located near the bottom of the first electromagnetic clamp (70) and the second electromagnetic clamp (71). The first electromagnetic clamp (70) has a support platform (74) fixed on the side facing the second electromagnetic clamp (71). The support platform (74) is located above the limiting post (72), and the NOL ring abuts against the upper end of the support platform (74).

5. A cutting auxiliary fixture for composite material NOL rings as described in any one of claims 2 to 4, characterized in that, Rubber pads (75) are fixed to the opposite sides of the first electromagnetic clamp (70) and the second electromagnetic clamp (71).

6. A cutting auxiliary fixture for composite material NOL rings as described in any one of claims 2 to 4, characterized in that, The first electromagnetic clamp (70) of the first clamping assembly (3) has a track (76) fixed on its side. The track (76) is set parallel to the limiting post (72). A limiting plate (77) slides in the track (76), and the NOL ring abuts against the limiting plate (77).

7. The cutting auxiliary fixture for composite material NOL rings as described in claim 6, characterized in that, An extension plate (78) is vertically fixed to the side of the first electromagnetic clamp (70), and the track (76) is fixed to the side of the first electromagnetic clamp (70) and the extension plate (78).

8. The cutting auxiliary fixture for composite material NOL rings as described in claim 1, characterized in that, A spindle (8) is rotatably connected to the base (1). A bushing (9) is fixed at one end of the support arm (6) of the first clamping assembly (3) and the second clamping assembly (4). The bushing (9) of the first clamping assembly (3) is rotatably connected to the spindle (8). The bushing (9) of the second clamping assembly (4) is fixed to the base (1). One end of the support arm (6) of the feed assembly (5) is fixed to the spindle (8).

9. The cutting auxiliary fixture for composite material NOL rings as described in claim 8, characterized in that, The locking mechanism includes a coupling (10) and an electromagnet, the electromagnet being fixed on the spindle (8), the electromagnet being able to attract the bushing (9), the coupling (10) being located between the two bushings (9), and the coupling (10) being sleeved on the spindle (8).

10. The cutting auxiliary fixture for composite material NOL rings as described in claim 8, characterized in that, The dial (2) is fixed to the arm (6) of the feed assembly (5).

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