A-95 porcelain end head inner small product re-burning repair auxiliary and rework device

Abstract

This utility model discloses an auxiliary tool and device for re-firing and repairing small products inside A-95 ceramic end caps. The auxiliary tool includes a main body, a cone, and a first step. The main body, cone, and first step are integrally formed. Both ends of the main body are connected to one end of the cone, and the first step is connected to the other end of the cone. The height of the first step is the same as the height of the cone. An upper ceramic pad, the A-95 ceramic end cap re-firing and repair auxiliary tool, and a lower ceramic pad are arranged sequentially. The A-95 ceramic shell product is installed between the upper ceramic pad and the A-95 ceramic end cap re-firing and repair auxiliary tool, and between the A-95 ceramic end cap re-firing and repair auxiliary tool and the lower ceramic pad. This utility model improves the situation of A-95 ceramic end cap narrowing, ensures that the product size meets the requirements, thereby effectively avoiding product scrap and improving the economic benefits of enterprises.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum interrupter metallized ceramic shell firing technology, and in particular, it is a small product re-firing and re-repairing tool and device for A-95 ceramic end caps. Background Technology

[0002] Vacuum interrupters are core components of medium- and high-voltage power switches, and their performance directly affects the reliability and service life of the power switches. Due to their excellent arc-extinguishing performance, high insulation strength, and long lifespan, vacuum interrupters are widely used in high-voltage power transmission and distribution systems, as well as in metallurgy, mining, petroleum, chemical, railway, broadcasting, communications, and industrial high-frequency heating systems. The metallized ceramic shell is one of the key components of a vacuum interrupter. Figure 1 As shown, its dimensional and shape accuracy is crucial, because any tiny dimensional deviation can lead to difficulties in assembling the vacuum interrupter, and even affect its sealing performance and arc extinguishing effect.

[0003] In the production process of metallized ceramic shells, ceramic firing is a general term for the densification process and phenomena of ceramic green bodies at high temperatures. During this process, the particles inside the ceramic shell undergo rearrangement, dissolution-precipitation reactions, etc., resulting in a reduction in the volume and an increase in density of the ceramic shell, thereby obtaining the required mechanical and electrical properties. However, in order to control the size and roundness of the product during firing, ceramic pads of the same material are placed at the top and bottom of the product during the firing process, such as... Figure 2 and Figure 3 As shown, ceramic pads can play a supporting and guiding role. The shrinkage of ceramic pads drives and controls the shrinkage of the product, thereby ensuring the dimensional and shape accuracy of the product.

[0004] However, in actual production, depending on the product height, the product is fired using a double-layer loading method, such as... Figure 4 As shown, while this method improves production efficiency to some extent, it also introduces some new problems. Because the intermediate spacer is prone to collapse and uneven shrinkage at high temperatures, the inner diameter of the ceramic shell end is easily reduced during firing, such as... Figure 5 As shown, the inner diameter of the product end is smaller than the required size. If the product has a wall thickness requirement, the wall thickness of the narrowed part cannot be repaired by grinding with a grinding wheel on a grinding machine, which leads to product scrapping and huge economic losses to the company.

[0005] To address this issue, improve product qualification rates, and reduce production costs, it is necessary to design an auxiliary tool that improves the end-recession of A-95 ceramic through a firing and re-firing process, thereby ensuring that the product dimensions meet requirements. Summary of the Invention

[0006] The purpose of this utility model is to provide an auxiliary tool and device for re-firing and repairing small products inside the A-95 ceramic end, so as to solve the problem of product end shrinkage during the firing process in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A small product re-firing and repair tool for A-95 ceramic end caps, comprising a tool body, a cone, and a first step;

[0009] The assistive device body, cone, and first step are integrally formed. Both ends of the assistive device body are connected to one end of the cone, and the first step is connected to the other end of the cone. The height of the first step is the same as the height of the cone.

[0010] Furthermore, the inclination of the cone is 45°.

[0011] Furthermore, the material of the auxiliary tool for re-firing and repairing small products inside the A-95 ceramic end is A-95 ceramic.

[0012] Furthermore, the outer diameter of the first step is the outer diameter of the A-95 ceramic shell product + 2~5mm, and the inner diameter of the first step is the inner diameter of the A-95 ceramic shell product + 4~5mm.

[0013] A rework device includes an upper ceramic pad, a lower ceramic pad, and a re-firing and rework tool for small products inside the A-95 ceramic end. The upper ceramic pad, the re-firing and rework tool for small products inside the A-95 ceramic end, and the lower ceramic pad are arranged sequentially. A-95 ceramic shell products are installed between the upper ceramic pad and the re-firing and rework tool for small products inside the A-95 ceramic end, and between the re-firing and rework tool for small products inside the A-95 ceramic end and the lower ceramic pad.

[0014] Furthermore, the upper ceramic pad and the lower ceramic pad are made of A-95 ceramic.

[0015] Furthermore, both ends of the upper ceramic pad and the lower ceramic pad are provided with a second step.

[0016] Furthermore, the second step is a ramp structure with an angle of 45±5°.

[0017] Furthermore, the second step is installed with an interference fit to the end of the A-95 ceramic shell product that meets the required dimensions, and the first step is installed with the end of the A-95 ceramic shell product that has a small inner narrowing.

[0018] Furthermore, the outer diameter of the second step is the same as the outer diameter of the A-95 ceramic shell product, and the inner diameter of the second step is the sum of the inner diameter of the A-95 ceramic shell product and the clearance of the interference fit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention provides a re-firing and repair tool for small A-95 ceramic shell products. By integrally molding the tool body, cone, and first step, it avoids weak connection points caused by multi-part assembly, resulting in higher structural strength and stability, and better able to withstand various stresses during firing. Both ends of the tool body are connected to one end of the cone, and the first step is connected to the other end of the cone, with the height of the first step matching the height of the cone. Through the cooperation of the cone and the first step, the inclined surface of the cone can disperse the stress generated during the shrinkage of the A-95 ceramic shell product, making the shrinkage process more stable; the first step can support and restrict the end of the A-95 ceramic shell product, preventing excessive shrinkage. This ensures the dimensional accuracy and relative positional relationship of the A-95 ceramic shell product, thereby better guiding the shrinkage of the A-95 ceramic shell product and improving the dimensional and shape accuracy of the fired product.

[0021] This utility model also provides a rework device, which consists of an upper ceramic pad, an A-95 ceramic end cap rework and repair fixture, and a lower ceramic pad arranged sequentially. The A-95 ceramic shell product is fitted between the upper ceramic pad and the A-95 ceramic end cap rework and repair fixture, and between the A-95 ceramic end cap rework and repair fixture and the lower ceramic pad, providing comprehensive and stable support for the A-95 ceramic shell product. During the rework process, the A-95 ceramic shell product is subjected to high temperatures and stress generated by its own shrinkage. This fixture structure effectively disperses these stresses, preventing deformation or damage to the A-95 ceramic shell product due to uneven stress, and ensuring the shape and dimensional stability of the A-95 ceramic shell product during the rework process. This utility model is simple and easy to implement. By matching the upper and lower ceramic pads with the auxiliary tool for reheating and repairing small products inside the A-95 ceramic end, the small shrinkage products inside the end are reheated, which improves the shrinkage of the A-95 ceramic end, ensures that the product size meets the requirements, and the reheating qualification rate is over 80%. This effectively avoids product scrap, reduces product quality loss, and improves the economic benefits of enterprises. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a metallized ceramic shell.

[0024] Figure 2 This is a schematic diagram of a ceramic pad.

[0025] Figure 3 This is a schematic diagram of the assembly of a ceramic green body and a ceramic spacer.

[0026] Figure 4 This is a schematic diagram of the assembly of ceramic green bodies with ceramic spacers during double-layer loading.

[0027] Figure 5 This is a schematic diagram of the narrowed end of a ceramic piece.

[0028] Figure 6 This is a schematic diagram of the A-95 ceramic end cap internal small product re-firing and re-repair auxiliary tool structure of this utility model.

[0029] Figure 7 This is an assembly diagram of the small product inside the end of this utility model and the repair device.

[0030] Among them: 1-upper ceramic pad, 2-lower ceramic pad, 3-A-95 ceramic end small product re-firing and re-repair auxiliary tool, 4-end small narrowing, 5-auxiliary tool body, 6-cone, 7-first step, 8-second step, 9-A-95 ceramic shell product. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The present invention will now be described in further detail with reference to the accompanying drawings:

[0038] See Figure 6 This utility model provides an auxiliary tool for re-firing and repairing small products inside the A-95 ceramic end, including a tool body 5, a cone 6 and a first step 7;

[0039] The A-95 ceramic end-cap small product re-firing and repair auxiliary tool 3 is made of A-95 ceramic, the same material as the A-95 ceramic shell product 9. During the firing process, the A-95 ceramic end-cap small product re-firing and repair auxiliary tool 3 and the A-95 ceramic shell product 9, being of the same material, have similar physical properties such as the coefficient of thermal expansion. This effectively avoids the problem of uneven thermal stress caused by material differences. The auxiliary tool body 5, the cone 6, and the first step 7 are integrally molded structures. The integral molding structure avoids the connection gaps and assembly errors caused by the assembly of multiple parts, ensuring the overall structural stability and dimensional accuracy of the A-95 ceramic end-cap small product re-firing and repair auxiliary tool 3. This allows the A-95 ceramic end-cap small product re-firing and repair auxiliary tool 3 to better play its supporting and guiding role during the firing process, improving the dimensional and shape accuracy of the product. Both ends of the auxiliary tool body 5 are connected to one end of the cone 6, and the first step 7 is connected to the other end of the cone 6. The cone 6 has a 45° inclination, which allows the A-95 ceramic shell product 9 to be guided by the re-firing and repair auxiliary tool 3 inside the A-95 ceramic end. When the A-95 ceramic shell product 9 shrinks, the incline of the cone 6 can evenly distribute the shrinkage stress, preventing stress concentration in a certain part of the A-95 ceramic shell product 9, thereby reducing the deformation of the A-95 ceramic shell product 9 caused by stress concentration. The height of the first step 7 is consistent with the height of the cone 6, ensuring the overall structural coordination and stability of the A-95 ceramic shell product 9 re-firing and repair auxiliary tool 3. The outer diameter of the first step 7 is the outer diameter of the A-95 ceramic shell product 9 + 2~5mm, and the inner diameter of the first step 7 is the inner diameter of the A-95 ceramic shell product 9 + 4~5mm. During the firing process, the first step 7 can provide certain restriction and support to the end 9 of the A-95 ceramic shell product, control the degree of shrinkage of the end 9 of the A-95 ceramic shell product, prevent excessive shrinkage of the inner diameter of the end 9 of the A-95 ceramic shell product and the occurrence of a narrowing phenomenon, and ensure that the inner diameter of the product end is within the specified range, thus meeting the dimensional accuracy requirements of the product.

[0040] like Figure 7As shown, this utility model also provides a rework device, including an upper ceramic pad 1, a lower ceramic pad 2, and the aforementioned A-95 ceramic end-cap small product re-firing and rework auxiliary tool 3. These components cooperate to form a complete re-firing support system, providing comprehensive support and guidance for the A-95 ceramic shell product 9. The upper ceramic pad 1 and lower ceramic pad 2 are made of A-95 ceramic and are sintered in a high-temperature kiln using the normal A-95 ceramic sintering process. The upper ceramic pad 1 is made of the same material as the A-95 ceramic end-cap small product re-firing and rework auxiliary tool 3 and the A-95 ceramic shell product 9 to be reworked. Using the same material minimizes the risk of stress concentration, ensuring the structural stability and dimensional accuracy of the A-95 ceramic shell product 9 during the re-firing process and improving the rework success rate. The upper ceramic pad 1, the A-95 ceramic end-small product re-firing and repair auxiliary tool 3, and the lower ceramic pad 2 are arranged sequentially from top to bottom. The A-95 ceramic shell product 9 is installed between the upper ceramic pad 1 and the A-95 ceramic end-small product re-firing and repair auxiliary tool 3, and between the A-95 ceramic end-small product re-firing and repair auxiliary tool 3 and the lower ceramic pad 2. The A-95 ceramic shell product 9 has a cylindrical structure. During sintering, the cylindrical A-95 ceramic shell product 9 is placed upright with pads at both ends, forming a double-layer loading. The A-95 ceramic end-small product re-firing and repair auxiliary tool 3 plays a role in controlling the shrinkage of the A-95 ceramic shell product 9 during re-firing. Combined with the upper ceramic pad 1 and the lower ceramic pad 2, it can more comprehensively control the shrinkage of the A-95 ceramic shell product 9 in all directions, avoiding dimensional deviations and shape defects caused by uneven local shrinkage, thereby reducing product deformation.

[0041] Both ends of the upper ceramic pad 1 and the lower ceramic pad 2 are provided with a second step 8, which is a ramp structure with an angle of 45±5°. The ramp structure facilitates the installation and positioning of the upper ceramic pad 1 and the lower ceramic pad 2 with the A-95 ceramic shell product 9. During the re-firing process, when the A-95 ceramic shell product 9 shrinks due to heat, the ramp structure can evenly distribute the shrinkage stress, avoid stress concentration in a certain part of the A-95 ceramic shell product 9, and reduce deformation caused by stress concentration. The second step 8 is installed with an interference fit at one end of the A-95 ceramic shell product 9, ensuring the end dimensions are within acceptable limits. The first step 7 is installed with one end of the A-95 ceramic shell product 9 with an inner small constriction 4. This enhances the connection stability between the upper ceramic pad 1, the lower ceramic pad 2, and the A-95 ceramic shell product 9 with the inner small product re-firing and repair tool 3. This reduces movement or deformation of the A-95 ceramic shell product 9 during re-firing, better transfers stress and heat during re-firing, effectively improves the inner small constriction 4, and enhances the dimensional and shape accuracy of the product. The outer diameter of the second step 8 is consistent with the outer diameter of the A-95 ceramic shell product 9, ensuring the appearance consistency of the A-95 ceramic shell product 9 after repair. This allows for better installation and coordination with other components and also helps improve the overall strength and stability of the A-95 ceramic shell product 9. The inner diameter of the second step 8 is the sum of the inner diameter of the A-95 ceramic shell product 9 and the clearance of the interference fit. This takes into account both the requirements of the interference fit and ensures the accuracy of the inner diameter of the A-95 ceramic shell product 9. During the re-firing process, the inner diameter of the A-95 ceramic shell product 9 can be precisely controlled by the upper ceramic pad 1 and the lower ceramic pad 2, ensuring that the inner diameter of the reworked A-95 ceramic shell product 9 meets the product requirements and improves the product's performance.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A small product re-firing and repair tool for A-95 ceramic end caps, characterized in that, Includes the main body of the assistive device, the cone, and the first step; The assistive device body, cone, and first step are integrally formed. Both ends of the assistive device body are connected to one end of the cone, and the first step is connected to the other end of the cone. The height of the first step is the same as the height of the cone.

2. The auxiliary tool for re-firing and repairing small products inside an A-95 ceramic end as described in claim 1, characterized in that, The inclination of the cone is 45°.

3. The auxiliary tool for re-firing and repairing small products inside an A-95 ceramic end as described in claim 1, characterized in that, The material of the auxiliary tool for re-firing and repairing small products inside the A-95 ceramic end is A-95 ceramic.

4. The auxiliary tool for re-firing and repairing small products inside an A-95 ceramic end as described in claim 1, characterized in that, The outer diameter of the first step is the outer diameter of the A-95 ceramic shell product + 2~5mm, and the inner diameter of the first step is the inner diameter of the A-95 ceramic shell product + 4~5mm.

5. A rework device, characterized in that, The device includes an upper ceramic pad, a lower ceramic pad, and the A-95 ceramic end cap internal small product reheating and repair auxiliary tool as described in any one of claims 1 to 4. The upper ceramic pad, the A-95 ceramic end cap internal small product reheating and repair auxiliary tool, and the lower ceramic pad are arranged sequentially. The A-95 ceramic shell product is installed in conjunction with the upper ceramic pad and the A-95 ceramic end cap internal small product reheating and repair auxiliary tool, and between the A-95 ceramic end cap internal small product reheating and repair auxiliary tool and the lower ceramic pad.

6. A rework device according to claim 5, characterized in that, The upper and lower ceramic pads are made of A-95 ceramic.

7. A rework device according to claim 5, characterized in that, Both ends of the upper ceramic pad and the lower ceramic pad are provided with a second step.

8. A rework device according to claim 7, characterized in that, The second step is a ramp structure with an angle of 45±5°.

9. A rework device according to claim 7, characterized in that, The second step is installed with an interference fit at the end of the A-95 ceramic shell product that meets the required dimensions, and the first step is installed with the end of the A-95 ceramic shell product that has a small inner constriction.

10. A rework device according to claim 9, characterized in that, The outer diameter of the second step is the same as the outer diameter of the A-95 ceramic shell product, and the inner diameter of the second step is the sum of the inner diameter of the A-95 ceramic shell product and the clearance of the interference fit.

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