Precision machining device for roller structure

Abstract

The invention relates to the field of roller machining, in particular to a roller structure precision machining device which comprises a center head, an outer cylinder, a belleville spring and an adjusting seat. The center head is installed at one end in the inner cylinder and can move along the central axis of the inner cylinder. The outer cylinder sleeves the other end of the outer part of the inner cylinder; the outer cylinder is rotationally connected with the inner cylinder; the multiple belleville springs are arranged in the central axis direction of the inner cylinder and located in the inner cylinder, and the belleville spring at one end abuts against the center head. The adjusting base is installed at the end, away from the center head, of the inner cylinder, and the end of the adjusting base abuts against the belleville spring at the other end. Flexible clamping force is provided through elastic force of the belleville spring, roller deformation caused by too tight or slipping caused by too loose is avoided, meanwhile, thermal deformation in the roller machining process is self-adapted, hidden errors caused by thermal stress are eliminated, the rotating requirement during roller machining is met through rotating connection of the inner barrel and the outer barrel, and the clamping force can be conveniently adjusted through the adjusting base.

Description

Technical Field

[0001] This invention relates to the field of roller processing, and in particular to a precision machining apparatus for roller structures. Background Technology

[0002] In the field of precision machining of roller structures (such as rolling mill rolls, printing rolls, guide rolls, etc.), the clamping and positioning accuracy of the rollers directly determines the final machining quality. Currently, the industry commonly uses rigid centers or simple elastic centers to achieve support and positioning at both ends of the rollers, but the following key technical challenges exist: Traditional rigid tops rely on manual experience to adjust the tightness. Excessive tightness can cause axial bending or damage to the center hole of the rollers (especially thin-walled rollers and rollers made of soft materials); insufficient tightness can cause the rollers to slip during processing, resulting in radial runout and reducing the machining accuracy such as roundness and coaxiality.

[0003] During precision machining such as grinding, rollers will elongate axially due to frictional heat. Traditional tops lack elastic compensation structures, which will transfer thermal deformation stress to the inside of the roller, causing the roller to have hidden deformation and subsequent dimensional accuracy to exceed tolerances after cooling.

[0004] The rotating connection between the top and the support cylinder (such as the bushing and the cylinder wall) is prone to jamming or wear due to poor lubrication and heat dissipation. Especially in long-term high-speed processing scenarios, the rotational accuracy gradually decreases, affecting the consistency of roller processing.

[0005] Although some of the elastic tips are equipped with spring structures, the adjustment of spring force depends on the addition or removal of shims or the rough tightening of bolts, which cannot achieve precise quantitative adjustment and is difficult to adapt to the clamping requirements of rollers of different diameters and materials. At the same time, excessive friction during the adjustment process can easily cause adjustment jamming, resulting in low operating efficiency.

[0006] During axial movement, the tip is prone to radial wobble or relative rotational offset, which reduces the fitting accuracy between the tip and the center hole of the roller, and in turn causes positioning offset during roller processing, affecting the final surface roughness and dimensional accuracy. Summary of the Invention

[0007] Based on this, it is necessary to provide a precision machining device for roller structures to address the above-mentioned technical problems. This device uses the elastic force of disc springs to provide flexible clamping force, avoiding excessive tightness that could cause roller deformation or excessive looseness that could cause slippage. At the same time, it adapts to thermal deformation during roller machining, eliminating latent errors caused by thermal stress.

[0008] This invention provides a precision machining device for roller structures, comprising: A center tip is installed inside one end of the inner cylinder, and the center tip can move along the central axis of the inner cylinder; An outer cylinder is fitted over the other end of the inner cylinder, and the outer cylinder is rotatably connected to the inner cylinder. Multiple disc springs are arranged along the central axis of the inner cylinder, and all of the disc springs are located inside the inner cylinder, with one end of the disc spring abutting against the top tip. An adjusting seat is installed at the end of the inner cylinder away from the tip, and the end of the adjusting seat abuts against the disc spring at the other end.

[0009] In one embodiment, the inner cylinder includes a first fixing tube, a second fixing tube, and a first inner fixing ring; the first fixing tube is connected to the end of the second fixing tube, and the two have the same inner diameter, the outer diameter of the first fixing tube is larger than the outer diameter of the second fixing tube, and the first inner fixing ring is disposed at the end of the inner ring of the first fixing tube away from the second fixing tube.

[0010] In one embodiment, the outer ring of the second fixing tube is fitted with an outer fixing ring, and the outer cylinder includes a third fixing tube and a second inner fixing ring; the third fixing tube is fitted on the outer ring of the second fixing tube, the inner ring of the third fixing tube has an annular groove, the outer fixing ring is engaged in the annular groove, and the second inner fixing ring is disposed at the end of the inner ring of the third fixing tube away from the first fixing tube.

[0011] In one embodiment, the bottom surface of the annular groove has multiple sets of through holes, which are arranged in a ring array, and each set of through holes includes at least two through holes spaced apart along the central axis of the third fixed tube.

[0012] In one embodiment, the through hole includes a tapered hole and a connecting hole; the tapered hole is located outside the third fixed tube, with its tapered end facing the central axis of the third fixed tube, and the connecting hole connects the tapered end of the tapered hole and the annular groove.

[0013] In one embodiment, a third inner fixing ring is provided on the surface of the annular groove, and the inner ring of the third inner fixing ring and the inner ring of the communicating hole are located on the same curved surface.

[0014] In one embodiment, the tip includes a tip, a first connecting post, a second connecting post, and a first locking block; the tip, the first connecting post, the second connecting post, and the first locking block are connected end to end in sequence, the diameter of the first connecting post is smaller than the diameter of the tip and larger than the diameter of the second connecting post, the outer diameter of the first connecting post is in movable contact with the inner ring of the first inner fixing ring, and the outer diameter of the first locking block is in movable contact with the inner ring of the second fixing tube.

[0015] In one embodiment, the first connecting column is provided with a plurality of arc-shaped plates arranged in a circular array, the plurality of arc-shaped plates being spaced apart and forming a limiting groove at the intervals, the inner ring of the first fixing tube is provided with a plurality of limiting strips arranged in a circular array, the limiting strips being arranged along the central axis of the first fixing tube, and the inner surface of the limiting strips being located on the same curved surface as the inner ring of the first inner fixing ring, the limiting strips being movably engaged in the limiting grooves.

[0016] In one embodiment, the adjusting seat includes a third connecting column, a thrust bearing, and a second locking block; the third connecting column is installed inside the second inner fixing ring, the thrust bearing is disposed at one end of the third connecting column located inside the second fixing tube, and the second locking block is disposed at the other end of the third connecting column.

[0017] In one embodiment, the third connecting post is threadedly connected to the second inner fixing ring, and the third connecting post is used to apply thrust to the thrust bearing.

[0018] The aforementioned precision machining device for roller structures uses an inner cylinder as the core support carrier. A center head is installed inside one end of the inner cylinder and can move freely axially along its central axis. An outer cylinder is fitted around the other end of the inner cylinder, and a rotating connection structure enables relative rotation between the inner and outer cylinders (meeting the rotational requirements during roller machining). Multiple disc springs are arranged sequentially along the central axis of the inner cylinder. The disc spring closer to the center head abuts against the end of the center head, while the disc spring further away from the center head abuts against the end of the adjusting seat. The adjusting seat is installed at the end of the inner cylinder furthest from the center head, and its displacement changes the compression of the disc springs. When clamping a roller, the center head contacts the center hole of the roller, and the roller's reaction force pushes the center head to compress the disc springs. The elastic force generated by the disc springs forms a stable clamping force. During machining, when the roller undergoes thermal deformation and elongation, the center head can further compress the disc springs to compensate for axial deformation. The initial compression of the disc springs can be adjusted via the adjusting seat to accommodate different clamping force requirements. The disc spring provides flexible clamping force, avoiding excessive tightness that could deform the roller or excessive looseness that could cause slippage. It also adapts to thermal deformation during roller processing, eliminating hidden errors caused by thermal stress. The rotating connection between the inner and outer cylinders meets the rotation requirements during roller processing. The adjusting seat allows for convenient adjustment of the clamping force. It can adapt to rollers of different materials and sizes without disassembling the device, improving processing versatility. It achieves precise clamping and self-adaptive functions with fewer parts, reducing device complexity, facilitating manufacturing and maintenance, and reducing the number of vulnerable parts, thus extending the overall service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A three-dimensional structural schematic diagram of the precision machining device for roller structures provided by the present invention; Figure 2 A schematic diagram of the planar structure of the precision machining device for roller structures provided by the present invention; Figure 3 A schematic diagram showing the disassembled structure of the precision machining device for roller structures provided by the present invention; Figure 4 This is a schematic diagram of the inner cylinder provided by the present invention; Figure 5 This is a schematic diagram of the outer cylinder provided by the present invention; Figure 6 This is a schematic diagram of the through hole provided by the present invention; Figure 7 A schematic diagram of the structure of the tip provided by the present invention; Figure 8 This is a schematic diagram of the structure of the adjustment seat provided by the present invention.

[0021] Figure label: 100. Inner cylinder; 110. First fixing tube; 120. Second fixing tube; 130. First inner fixing ring; 140. Limiting strip; 150. Outer fixing ring; 200. Center head; 210. Center part; 220. First connecting post; 230. Arc plate; 231. Limiting groove; 240. Second connecting post; 250. First locking block; 300. Disc spring; 400. Adjusting seat; 410. Third connecting post; 420. Thrust bearing; 430. Second locking block; 500. Outer cylinder; 510. Third fixing tube; 511. Annular groove; 512. Through hole; 5121. Tapered hole; 5122. Connecting hole; 520. Second inner fixing ring; 530. Third inner fixing ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The following is combined Figures 1 to 8 This invention describes a precision machining apparatus for a roller structure.

[0024] like Figures 1 to 3 As shown, in one embodiment, a precision machining device for a roller structure includes a center head 200, an outer cylinder 500, a disc spring 300, and an adjusting seat 400. The center head 200 is installed inside one end of the inner cylinder 100 and can move along the central axis of the inner cylinder 100. The outer cylinder 500 is sleeved on the other end of the inner cylinder 100 and is rotatably connected to the inner cylinder 100. Multiple disc springs 300 are arranged along the central axis of the inner cylinder 100, and all of the disc springs 300 are located inside the inner cylinder 100. One end of the disc spring 300 abuts against the center head 200. The adjusting seat 400 is installed at the end of the inner cylinder 100 away from the center head 200, and the end of the adjusting seat 400 abuts against the disc spring 300 at the other end.

[0025] The aforementioned precision machining device for roller structures uses the inner cylinder 100 as the core support carrier. The center head 200 is installed inside one end of the inner cylinder 100 and can move freely along the central axis of the inner cylinder 100. The outer cylinder 500 is sleeved on the other end of the inner cylinder 100. The relative rotation of the inner cylinder 100 and the outer cylinder 500 is achieved through a rotating connection structure (to meet the rotation requirements during roller processing). Multiple disc springs 300 are arranged sequentially inside the inner cylinder 100 along the central axis of the inner cylinder 100. The disc spring 300 near the center head 200 abuts against the end of the center head 200, and the disc spring 300 away from the center head 200 abuts against the end of the adjusting seat 400. The adjusting seat 400 is installed at the end of the inner cylinder 100 away from the center head 200. The compression of the disc spring 300 can be changed by the displacement of the adjusting seat 400. When clamping the roller, the center head 200 contacts the center hole of the roller, and the reaction force of the roller pushes the center head 200 to compress the disc spring 300. The elastic force generated by the disc spring 300 forms a stable clamping force. When the roller undergoes thermal deformation and elongation during processing, the center head 200 can further compress the disc spring 300 to achieve axial deformation compensation. The initial compression of the disc spring 300 can be adjusted by the adjusting seat 400 to adapt to different clamping force requirements. The disc spring 300 provides flexible clamping force, avoiding excessive tightness that could cause roller deformation or excessive looseness that could cause slippage. It also adapts to thermal deformation during roller processing, eliminating hidden errors caused by thermal stress. The rotational connection between the inner cylinder 100 and the outer cylinder 500 meets the rotational requirements during roller processing. The adjusting seat 400 allows for convenient adjustment of the clamping force. It can adapt to rollers of different materials and sizes without disassembling the device, improving processing versatility. It achieves precise clamping and self-adaptive functions with fewer parts, reducing device complexity, facilitating processing, manufacturing and maintenance, while reducing the number of vulnerable parts and extending the overall service life.

[0026] like Figure 4 As shown, in one embodiment, the inner cylinder 100 includes a first fixing tube 110, a second fixing tube 120, and a first inner fixing ring 130; the first fixing tube 110 and the second fixing tube 120 are connected at their ends, and the two have the same inner diameter. The outer diameter of the first fixing tube 110 is larger than the outer diameter of the second fixing tube 120, and the first inner fixing ring 130 is disposed at the end of the inner ring of the first fixing tube 110 away from the second fixing tube 120.

[0027] Specifically, the stepped design of the first fixing tube 110 and the second fixing tube 120 ensures the coaxial movement space of the internal components (center head 200, spring) and provides a clear fitting position for the outer cylinder 500, avoiding installation offset of the outer cylinder 500. The first inner fixing ring 130 provides radial support for the center head 200, preventing radial wobbling of the center head 200 during axial movement, ensuring the fitting accuracy between the center head 210 and the center hole of the roller, and reducing positioning errors. The consistent inner diameter design ensures that the disc spring 300 is not offset or compressed, and the different outer diameter design adapts to the structure of the outer cylinder 500, so that the inner cylinder 100 can simultaneously meet the dual functions of "internal component guidance" and "external component connection", improving the structural integration.

[0028] like Figure 5 As shown, in one embodiment, the outer ring of the second fixing tube 120 is fitted with an outer fixing ring 150, and the outer cylinder 500 includes a third fixing tube 510 and a second inner fixing ring 520; the third fixing tube 510 is fitted on the outer ring of the second fixing tube 120, and the inner ring of the third fixing tube 510 is provided with an annular groove 511, the outer fixing ring 150 is engaged in the annular groove 511, and the second inner fixing ring 520 is disposed at the end of the inner ring of the third fixing tube 510 away from the first fixing tube 110.

[0029] Specifically, the snap-fit ​​structure between the outer fixed ring 150 and the annular groove 511 restricts the axial relative movement of the inner cylinder 100 and the outer cylinder 500, allowing only circumferential rotation. This avoids the positioning offset of the roller due to axial movement during processing. The annular groove 511 provides full circumferential support for the outer fixed ring 150, reducing radial runout during rotation and ensuring the coaxiality of the inner cylinder 100 during rotation. This improves the roundness accuracy of the roller processing. There is no need to set up additional complex bearing components. Stable rotation can be achieved through the cooperation of the outer fixed ring 150 and the annular groove 511, reducing component costs and assembly difficulty, while also facilitating later maintenance.

[0030] In one embodiment, the bottom surface of the annular groove 511 is provided with multiple sets of through holes 512, which are arranged in an annular array, and each set of through holes 512 includes at least two through holes 512 spaced apart along the central axis of the third fixed tube 510.

[0031] Specifically, the through hole 512 provides a convenient channel for lubricant injection and heat dissipation for the annular groove 511, avoiding component wear due to insufficient lubrication or structural thermal deformation due to heat accumulation, extending the service life of rotating parts. Lubrication and impurity cleaning can be carried out through the through hole 512 without disassembling the outer cylinder 500 and the inner cylinder 100, reducing maintenance time and lowering maintenance costs. The through holes 512 distributed in a full circumferential annular array ensure uniform lubricant coverage, avoid rotational jamming caused by insufficient local lubrication, and ensure the stability and consistency of the inner cylinder 100 during rotation.

[0032] like Figure 6 As shown, in one embodiment, the through hole 512 includes a tapered hole 5121 and a connecting hole 5122; the tapered hole 5121 is located outside the third fixed tube 510 and the tapered end faces the central axis of the third fixed tube 510, and the connecting hole 5122 connects the tapered end of the tapered hole 5121 and the annular groove 511.

[0033] Specifically, the flared design of the tapered hole 5121 facilitates rapid lubricant injection, avoiding the "entrance blockage" problem of traditional straight hole injection. At the same time, it guides the lubricant to flow precisely to the connecting hole 5122, reducing waste. The combined structure of the tapered hole 5121 and the connecting hole 5122 can prevent impurities from accumulating in the channel (impurities are easily discharged along the airflow or lubricant through the tapered hole 5121), ensuring that the through hole 512 remains unobstructed for a long time, and guaranteeing stable lubrication and heat dissipation functions. The large opening of the tapered hole 5121 facilitates operation with conventional lubrication tools (such as oil guns) without the need for special connectors, improving the convenience of lubrication operations.

[0034] In one embodiment, a third inner fixing ring 530 is provided on the surface of the annular groove 511, and the inner ring of the third inner fixing ring 530 and the inner ring of the connecting hole 5122 are located on the same curved surface.

[0035] Specifically, the design of the third inner fixing ring 530 protruding from the connecting hole 5122 prevents the lubricant in the annular groove 511 from being discharged freely through the connecting hole 5122 even at the lowest point.

[0036] like Figure 7 As shown, in one embodiment, the tip 200 includes a tip portion 210, a first connecting post 220, a second connecting post 240, and a first locking block 250; the tip portion 210, the first connecting post 220, the second connecting post 240, and the first locking block 250 are connected end to end in sequence, the diameter of the first connecting post 220 is smaller than the diameter of the tip portion 210 and larger than the diameter of the second connecting post 240, the outer diameter of the first connecting post 220 is in movable contact with the inner ring of the first inner fixing ring 130, and the outer diameter of the first locking block 250 is in movable contact with the inner ring of the second fixing tube 120.

[0037] Specifically, the dual radial fit structure of the "first connecting post 220 and the first inner fixing ring 130" with the "first locking block 250 and the second fixing tube 120" can effectively prevent radial wobbling or offset of the tip 200 when it moves axially, ensuring the positioning accuracy of the tip 210. The stepped diameter design allows the tip 200 to be precisely fitted with the first fixing tube 110 and the second fixing tube 120 of the inner cylinder 100 without the need for additional guide components, simplifying the structure while improving assembly accuracy. The diameter of the tip 210 is larger than that of the first connecting post 220, which can reduce the contact area between the tip 210 and the inner cylinder 100, preventing the edge of the inner cylinder 100 from scratching the tip 210 or the center hole of the roller, while ensuring the fit area between the tip 210 and the center hole, thus improving positioning stability.

[0038] In one embodiment, a plurality of arc-shaped plates 230 are arranged in a ring array on the first connecting column 220. The plurality of arc-shaped plates 230 are spaced apart and the spaced intervals form a limiting groove 231. A plurality of limiting strips 140 are arranged in a ring array on the inner ring of the first fixing tube 110. The limiting strips 140 are arranged along the central axis of the first fixing tube 110, and the inner surface of the limiting strips 140 and the inner ring of the first inner fixing ring 130 are located on the same curved surface. The limiting strips 140 are movably engaged in the limiting groove 231.

[0039] Specifically, the circumferential limiting fit between the limiting strip 140 and the limiting groove 231 can prevent the tip 200 from rotating relative to the roller during processing, ensuring a stable contact angle between the tip 210 and the center hole of the roller, avoiding processing errors caused by positioning direction deviation. The axial sliding fit between the limiting strip 140 and the limiting groove 231 is smooth, and the inner surface of the limiting strip 140 smoothly transitions with the inner ring of the first inner fixed ring 130, which will not hinder the axial movement of the tip 200 or cause additional friction, ensuring movement accuracy. The ring array of limiting strips 140 and limiting grooves 231 can evenly distribute circumferential forces, avoid component wear caused by local stress concentration, and extend the service life of the tip 200 and the inner cylinder 100.

[0040] like Figure 8 As shown, in one embodiment, the adjusting seat 400 includes a third connecting post 410, a thrust bearing 420, and a second locking block 430; the third connecting post 410 is installed inside the second inner fixing ring 520, the thrust bearing 420 is disposed at one end of the third connecting post 410 located inside the second fixing tube 120, and the second locking block 430 is disposed at the other end of the third connecting post 410.

[0041] Specifically, the thrust bearing 420 converts the sliding friction between the third connecting column 410 and the disc spring 300 into rolling friction, reducing adjustment resistance and making clamping force adjustment smoother. It also reduces component wear. The second locking block 430 extends outside the outer cylinder 500, allowing operators to rotate or push the third connecting column 410 with tools (such as wrenches) without having to go deep into the device, simplifying the adjustment process. The thrust bearing 420 ensures that the force exerted by the third connecting column 410 on the disc spring 300 is evenly distributed on the spring end face, preventing deformation or damage to the disc spring 300 due to force offset and extending the spring's service life.

[0042] In one embodiment, the third connecting post 410 is threadedly connected to the second inner retaining ring 520, and the third connecting post 410 is used to apply thrust to the thrust bearing 420.

[0043] Specifically, the threaded drive features "controllable micro-displacement." By rotating the third connecting column 410, the compression of the disc spring 300 can be precisely adjusted, thereby accurately controlling the clamping force. This adapts to the clamping requirements of rollers made of different materials (soft / hard) and with different wall thicknesses (thin / thick), improving clamping adaptability. The threaded connection has a self-locking function. After adjustment, no additional locking components are needed, and the third connecting column 410 can maintain its current position, preventing clamping force deviation due to vibration during processing and ensuring clamping stability. Adjustment can be completed simply by rotating the second locking block 430, without disassembling the device or replacing components. The operation process is simple, and the adjustment accuracy is high, reducing the technical threshold for operators.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A precision machining device for roller structures, characterized in that, include: A center tip is installed inside one end of the inner cylinder, and the center tip can move along the central axis of the inner cylinder; An outer cylinder is fitted over the other end of the inner cylinder, and the outer cylinder is rotatably connected to the inner cylinder. Multiple disc springs are arranged along the central axis of the inner cylinder, and all of the disc springs are located inside the inner cylinder, with one end of the disc spring abutting against the top tip. An adjusting seat is installed at the end of the inner cylinder away from the tip, and the end of the adjusting seat abuts against the disc spring at the other end.

2. The precision machining device for roller structures according to claim 1, characterized in that, The inner cylinder includes a first fixed tube, a second fixed tube, and a first inner fixed ring; the first fixed tube is connected to the end of the second fixed tube, and the two have the same inner diameter. The outer diameter of the first fixed tube is larger than the outer diameter of the second fixed tube, and the first inner fixed ring is disposed at the end of the inner ring of the first fixed tube away from the second fixed tube.

3. The precision machining device for roller structures according to claim 2, characterized in that, The outer ring of the second fixing tube is fitted with an outer fixing ring, and the outer cylinder includes a third fixing tube and a second inner fixing ring; the third fixing tube is fitted on the outer ring of the second fixing tube, and the inner ring of the third fixing tube has an annular groove, the outer fixing ring is engaged in the annular groove, and the second inner fixing ring is located at the end of the inner ring of the third fixing tube away from the first fixing tube.

4. The precision machining device for roller structures according to claim 3, characterized in that, The bottom surface of the annular groove has multiple sets of through holes, which are arranged in a ring array. Each set of through holes includes at least two through holes spaced apart along the central axis of the third fixed tube.

5. The precision machining device for roller structures according to claim 4, characterized in that, The through hole includes a tapered hole and a connecting hole; the tapered hole is located outside the third fixed tube, and the tapered end faces the central axis of the third fixed tube; the connecting hole connects the tapered end of the tapered hole and the annular groove.

6. The precision machining device for roller structures according to claim 5, characterized in that, A third inner fixing ring is provided on the surface of the annular groove, and the inner ring of the third inner fixing ring and the inner ring of the connecting hole are located on the same curved surface.

7. The precision machining device for roller structures according to claim 6, characterized in that, The tip includes a tip, a first connecting post, a second connecting post, and a first locking block; the tip, the first connecting post, the second connecting post, and the first locking block are connected end to end in sequence, the diameter of the first connecting post is smaller than the diameter of the tip and larger than the diameter of the second connecting post, the outer diameter of the first connecting post is in movable contact with the inner ring of the first inner fixing ring, and the outer diameter of the first locking block is in movable contact with the inner ring of the second fixing tube.

8. The precision machining device for roller structures according to claim 7, characterized in that, The first connecting column has multiple arc-shaped plates arranged in a ring array, with the multiple arc-shaped plates spaced apart and forming a limiting groove at the intervals. The inner ring of the first fixing tube has multiple limiting strips arranged in a ring array. The limiting strips are arranged along the central axis of the first fixing tube, and the inner surface of the limiting strips is located on the same curved surface as the inner ring of the first inner fixing ring. The limiting strips are movably engaged in the limiting grooves.

9. The precision machining device for roller structures according to claim 8, characterized in that, The adjusting seat includes a third connecting column, a thrust bearing, and a second locking block; the third connecting column is installed inside the second inner fixing ring, the thrust bearing is located at one end of the third connecting column inside the second fixing tube, and the second locking block is located at the other end of the third connecting column.

10. The precision machining device for roller structures according to claim 9, characterized in that, The third connecting post is threadedly connected to the second inner fixing ring, and the third connecting post is used to apply thrust to the thrust bearing.

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