Machining tool for grinding outer circle of zirconia ceramic cylinder sleeve

Abstract

The utility model relates to a positioning tool, in particular to a machining tool for grinding an outer circle of a zirconia ceramic cylinder sleeve, which comprises a rubber expansion body sleeved on a guide rod, the rubber expansion body is divided into two sections, a partition plate fixed on the guide rod is arranged between the two sections of the rubber expansion body, and end plates capable of moving along the axial direction of the guide rod are arranged at two ends of the guide rod. Nuts screwed on the guide rods are arranged on the outer sides of the end plates, two conical sleeves arranged on the two sides of the partition plate respectively are further arranged on the guide rods, and the thin ends of the conical sleeves face outwards; the inner side face of the rubber expansion body is an inner conical face matched with the outer side face of the conical sleeve. Due to the fact that the rubber expansion body is small in diameter and large in outer diameter expansion amplitude in the initial state, when the zirconia ceramic cylinder sleeve is sleeved, the problem that sleeving is difficult due to the high friction coefficient caused by the fact that rubber is equal to the inner diameter of the cylinder sleeve is solved, and assembling and disassembling are convenient and easy.

Description

Technical Field

[0001] This utility model relates to a positioning tooling, specifically a novel shaft expansion tooling for grinding the outer diameter of zirconia ceramic cylinder liners. Background Technology

[0002] Zirconia ceramic cylinder liners are products made of zirconia ceramic material, primarily used in applications requiring high performance and durability. The grinding of the outer diameter is a crucial step in the production process of zirconia ceramic cylinder liners, determining the assembly accuracy and surface roughness of the outer diameter. This step also requires overcoming the tendency of zirconia ceramic, as a brittle material, to fracture.

[0003] Previous tooling employed a three-point support principle, resulting in point contact and a small contact area between the tooling and the cylinder liner, making the ceramic cylinder liner prone to breakage during grinding. To address this, the applicant has applied for a novel shaft-expanding tooling for grinding the outer diameter of zirconia ceramic cylinder liners, with publication number "CN216608282U". However, with frequent use, the following drawbacks have been identified: If the diameter of the rubber expansion body is similar to the inner diameter of the zirconia ceramic cylinder liner during machining, the high coefficient of friction of the rubber increases the difficulty of fitting the zirconia ceramic cylinder liner, leading to a decrease in overall production efficiency; if the diameter of the rubber expansion body is smaller than the inner diameter of the zirconia ceramic cylinder liner, the cylinder liner may not expand tightly, causing loosening and affecting turning or grinding. Furthermore, during the tightening of the nut, the rubber expansion body undergoes a certain degree of torsion, which over time leads to rubber fatigue, cracks, and even breakage, affecting the tooling's service life. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: to provide a tooling for grinding the outer diameter of a zirconia ceramic cylinder liner.

[0005] The zirconia ceramic cylinder liner grinding outer diameter machining fixture of this utility model includes a rubber expansion body sleeved on a guide rod. The rubber expansion body is divided into two sections, and a partition plate fixed on the guide rod is provided between the two sections. Both ends of the guide rod are provided with end plates that can move along its axial direction. Nuts screwed onto the guide rod are provided on the outer side of the end plates. The guide rod is also provided with two conical sleeves respectively located on both sides of the partition plate, with the narrow end of the conical sleeve facing outward. The inner surface of the rubber expansion body is an inner conical surface that matches the outer surface of the conical sleeve.

[0006] In use, the zirconia ceramic cylinder liner is fitted onto the rubber expansion body. Tightening the nut applies pressure to the end plate, which in turn compresses the rubber expansion body. Under the compression of the end plate and the support of the tapered sleeve, the outer diameter of the rubber expansion body expands, thus contacting and supporting the inner circle of the cylinder liner, forming surface contact and positioning the zirconia ceramic cylinder liner. Compared to previous structures, the rubber expansion body has a smaller initial diameter and a larger outer diameter expansion range, facilitating the fitting operation of the zirconia ceramic cylinder liner.

[0007] Preferably, the end plate and partition are disc-shaped, coaxially arranged with the guide rod, and the outer diameter of the end plate and partition is smaller than the outer diameter of the rubber expansion body.

[0008] Preferably, the outer diameter of the end plate is equal to the outer diameter of the partition.

[0009] The partition of this invention has multiple guide posts on both sides, which are parallel to the axis of the guide rod. The rubber expansion body has through slots through which the guide posts can pass, and the end plate has through holes through which the guide posts can pass. The guide posts can restrict the circumferential torsion of the rubber expansion body, avoid torsional fatigue of the material, prevent cracking, and improve service life.

[0010] Preferably, the cross-section of the through groove is racetrack-shaped, and its width is equal to the diameter of the guide limit post.

[0011] Preferably, four guide posts are provided on each side of the partition, and the four guide posts are evenly distributed in a circular array with the axis of the guide rod as the center.

[0012] A gap is left between the end plate and the tapered sleeve.

[0013] The advantages of this utility model compared with the prior art are:

[0014] 1) Reduced loading and unloading difficulty: Since the rubber expansion body has a small initial diameter and a large outer diameter expansion range, when installing zirconia ceramic cylinder liners, it avoids the problem of difficult installation caused by the high friction coefficient due to the rubber and cylinder liner inner diameter being similar, making loading and unloading convenient and simple.

[0015] 2) Extend the service life of the tooling: The setting of the guide limit post restricts the circumferential torsion of the rubber expansion body, avoiding the situation where the rubber material cracks or even breaks due to torsional fatigue, which significantly improves the service life of the rubber expansion body and thus extends the service life of the entire tooling.

[0016] 3) Reasonable structure and convenient operation: The tooling has a reasonable overall structural design, with tight fit between all components, and is simple and convenient to operate. The expansion and contraction of the rubber expansion body can be achieved simply by tightening the nut, completing the installation and removal of the zirconia ceramic cylinder liner, greatly improving production efficiency and making it suitable for large-scale production applications.

[0017] 4) High adaptability: By adjusting the tightness of the nut, the expansion range of the rubber expansion body can be controlled, thereby adapting to the processing requirements of zirconia ceramic cylinder liners with different inner diameters, improving the versatility and adaptability of the tooling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0020] Figure 3 This is an exploded structural diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the zirconia ceramic cylinder liner fitted onto this utility model.

[0022] In the diagram: 1. Guide rod; 2. Nut; 3. End plate; 4. Guide limit post; 5. Rubber expansion body; 6. Partition plate; 7. Conical sleeve; 8. Through groove; 9. Through hole; 10. Zirconia ceramic cylinder liner. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0025] like Figures 1-4 As shown, this embodiment is achieved through the following technical solution: a tooling for grinding the outer diameter of a zirconia ceramic cylinder liner, including a rubber expansion body 5 sleeved on a guide rod 1, the rubber expansion body 5 being divided into two sections, with a partition plate 6 fixed on the guide rod 1 between the two sections of the rubber expansion body 5, and end plates 3 that can move along their axial direction at both ends of the guide rod 1, with nuts 2 screwed onto the guide rod 1 on the outer side of the end plates 3, and two conical sleeves 7 respectively disposed on both sides of the partition plate 6 on the guide rod 1, with the narrow end of the conical sleeves 7 facing outward; the inner surface of the rubber expansion body 5 is an inner conical surface that matches the outer surface of the conical sleeves 7, and a gap is left between the end plates 3 and the conical sleeves 7.

[0026] In this embodiment, the end plate 3 and the partition plate 6 are disc-shaped with equal outer diameters and are coaxially arranged with the guide rod 1. The outer diameters of the end plate 3 and the partition plate 6 are smaller than the outer diameter of the rubber expansion body 5.

[0027] In this embodiment, four guide posts 4 are evenly distributed on both sides of the partition 6. The guide posts 4 are parallel to the axis of the guide rod 1, and the four guide posts 4 are evenly distributed in a circular array with the axis of the guide rod 1 as the center. The rubber expansion body 5 has a through groove 8 through which the guide posts 4 can pass. The cross-section of the through groove 8 is racetrack-shaped, and its width is equal to the diameter of the guide posts 4. The end plate 3 has a circular through hole 9 through which the guide posts 4 can pass.

[0028] In use, the zirconia ceramic cylinder liner 10 is fitted onto the rubber expansion body. Tightening the nut 2 applies pressure to the end plate 3, thereby compressing the rubber expansion body 5. Under the compression of the end plate 3 and the support of the tapered sleeve 7, the outer diameter of the rubber expansion body 5 expands, contacting and supporting the inner circle of the cylinder liner, forming surface contact and positioning the zirconia ceramic cylinder liner 10. Compared to previous structures, the rubber expansion body 5 has a smaller initial diameter and a larger outer diameter expansion range, facilitating the fitting of the zirconia ceramic cylinder liner 10, making installation and removal convenient and simple, and improving processing efficiency.

[0029] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A tooling for grinding the outer diameter of a zirconia ceramic cylinder liner, comprising a rubber expansion body (5) sleeved on a guide rod (1), the rubber expansion body (5) being divided into two sections, a partition plate (6) fixed on the guide rod (1) being provided between the two sections of the rubber expansion body (5), and end plates (3) movable along its axial direction being provided at both ends of the guide rod (1), with nuts (2) screwed onto the guide rod (1) on the outer side of the end plates (3), characterized in that, The guide rod (1) is also provided with two conical sleeves (7) on both sides of the partition (6), with the thin end of the conical sleeve (7) facing outward; the inner side of the rubber expansion body (5) is an inner conical surface that matches the outer side of the conical sleeve (7).

2. The tooling for grinding the outer diameter of a zirconia ceramic cylinder liner according to claim 1, characterized in that, The end plate (3) and partition plate (6) are disc-shaped and coaxially arranged with the guide rod (1), and the outer diameter of the end plate (3) and partition plate (6) is smaller than the outer diameter of the rubber expansion body (5).

3. The tooling for grinding the outer diameter of a zirconia ceramic cylinder liner according to claim 2, characterized in that, The outer diameter of the end plate (3) is equal to the outer diameter of the partition plate (6).

4. The tooling for grinding the outer diameter of a zirconia ceramic cylinder liner according to claim 1, characterized in that, Multiple guide posts (4) are arranged on both sides of the partition (6), and the guide posts (4) are parallel to the axis of the guide rod (1); the rubber expansion body (5) is provided with a through groove (8) through which the guide posts (4) can pass, and the end plate (3) is provided with a through hole (9) through which the guide posts (4) can pass.

5. The tooling for grinding the outer diameter of a zirconia ceramic cylinder liner according to claim 4, characterized in that, The cross-section of the through groove (8) is racetrack shaped, and its width is equal to the diameter of the guide limit post (4).

6. The tooling for grinding the outer diameter of a zirconia ceramic cylinder liner according to claim 4 or 5, characterized in that, Four guide posts (4) are provided on each side of the partition (6), and the four guide posts (4) are evenly distributed in a circular array with the axis of the guide rod (1) as the center.

7. The tooling for grinding the outer diameter of a zirconia ceramic cylinder liner according to claim 1, characterized in that, A gap is left between the end plate (3) and the tapered sleeve (7).

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