Positioning disc for aging screening of zinc oxide voltage-sensitive ceramics

Abstract

The utility model discloses a positioning disc for aging screening of zinc oxide voltage-sensitive ceramics. Comprising a conductive bottom plate, the upper surface of the conductive bottom plate is covered with a grid plate, and a plurality of positioning grids are distributed on the grid plate; a conductive contact is arranged on the surface of the conductive bottom plate at the bottom of the positioning grid; and the contact point of the conductive contact and the zinc oxide voltage-sensitive ceramic is higher than the surface of the conductive bottom plate. The aging disc has the characteristics that good contact can be ensured, the ceramic chip is not easy to damage, the weight of the aging disc is light, the structural design is reasonable, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to a zinc oxide varistor ceramic processing device, in particular to a positioning plate for aging screening of zinc oxide varistor ceramics. Background Art

[0002] Zinc oxide varistor ceramics are functional ceramics based on zinc oxide materials, which are widely used in electronic components, sensors, power equipment and communication equipment, etc. Its processing technology mainly includes mixing, pressing, sintering, silvering, etc.

[0003] Aging screening is not a necessary process in the production of zinc oxide varistor ceramics. However, in order to improve the yield rate of zinc oxide varistor ceramics and prevent substandard zinc oxide varistor ceramics from entering the market, it is also necessary to perform aging screening on zinc oxide varistor ceramics during the manufacturing process.

[0004] The operation method of the zinc oxide varistor ceramic aging screening process is mainly to apply voltage on both sides of the ceramic. Therefore, the current aging equipment is mainly composed of an aging voltage cabinet and a special positioning plate. The positioning plate is used to hold the zinc oxide varistor ceramic sheet and position it to ensure that it can be accurately aligned and contacted with the power-applied contacts.

[0005] However, the existing zinc oxide varistor ceramic aging positioning disk is only a whole metal plate with several positioning pits on the metal plate. The biggest defect of this positioning disk is that the bottom of the pit may be uneven during processing and subsequent use. Since the silvered area of ​​the zinc oxide varistor ceramic is not silvered on the entire surface, the electrical contact must be in contact with the silvered area to age. Therefore, when the bottom of the positioning pit is uneven, it is likely to cause poor contact between the ceramic sheet and the bottom of the pit, and even the silvered area cannot contact the metal plate, so that aging screening cannot be performed, resulting in the consequence of misscreening.

[0006] Based on this, it is necessary to improve the design of zinc oxide varistor ceramic aging disk to overcome its existing defects. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a positioning plate for zinc oxide varistor ceramic aging screening. The utility model has the characteristics of ensuring good contact, and also has the characteristics of ceramic sheet not being easily damaged, light weight of aging plate, reasonable structural design and strong practicality.

[0008] The technical solution of this utility model:

[0009] A positioning plate for aging screening of zinc oxide varistor ceramics comprises a conductive base plate, the upper surface of which is covered with a grid plate, on which a plurality of positioning grids are distributed; a conductive contact is provided on the surface of the conductive base plate at the bottom of the positioning grids, and the contact point between the conductive contact and the zinc oxide varistor ceramic is higher than the surface of the conductive base plate.

[0010] In this solution, raised conductive contacts are provided on the conductive bottom plate at the bottom of the positioning grid, and the conductive contacts are utilized to contact the silvered area of ​​the zinc oxide varistor ceramic sheet. Regardless of deformation that occurs during processing or use of the conductive bottom plate, as long as the deformation is not very serious, this solution can ensure good contact and avoid the occurrence of misscreening.

[0011] Preferably, in the aforementioned positioning plate for aging screening of zinc oxide varistor ceramics, at least three conductive contacts are provided on the conductive bottom plate at the bottom of each positioning grid, and are distributed in the form of a regular triangle or a regular polygon.

[0012] In this preferred embodiment, by setting the conductive contacts to at least 3 and distributing them in the form of regular triangles or regular polygons, the flatness of the zinc oxide varistor ceramic sheet during placement can be ensured, avoiding consequences such as poor contact caused by tilting, and further ensuring good contact capability.

[0013] Preferably, in the aforementioned positioning plate for aging screening of zinc oxide varistor ceramics, a limiting hole is provided on the conductive bottom plate below the conductive contact, and a conductive spring is provided in the limiting hole; the conductive contact and the conductive bottom plate are elastically connected via the conductive spring.

[0014] In this preferred embodiment, by elastically connecting the conductive contact and the conductive base plate via a conductive spring, soft contact between the zinc oxide varistor ceramic sheet and the conductive base plate is achieved, thereby avoiding hard damage caused by hard contact during aging. The design is reasonable and practical.

[0015] Preferably, in the aforementioned positioning plate for aging screening of zinc oxide varistor ceramics, a cover plate is provided between the conductive bottom plate and the grid plate, and a bell mouth is provided on the cover plate at a position corresponding to the conductive contact, and the bell mouth is inverted on the conductive contact to limit it.

[0016] In this preferred solution, the conductive contacts are limited by providing a cover plate and a bell mouth, so that production and installation are more convenient and the structural design is more reasonable.

[0017] Preferably, in the aforementioned positioning plate for aging screening of zinc oxide varistor ceramics, the conductive bottom plate and the front cover plate are provided with structural through holes at locations corresponding to the middle of the positioning grid.

[0018] In this preferred solution, structural through holes are set in the conductive bottom plate and the cover plate corresponding to the middle of the positioning grid. Since the conductive bottom plate is a metal plate and needs to withstand the pressure applied by another electrode during the aging process, its thickness cannot be too thin, so it is heavy, which makes it difficult for workers to carry it. The structural through holes set in this solution can reduce the overall weight of the aging disk on the one hand, and reduce the deformable area in the positioning grid area on the other hand, thereby further ensuring good contact performance.

[0019] Preferably, in the aforementioned positioning plate for aging screening of zinc oxide varistor ceramics, the grid plate is made of insulating material.

[0020] In this preferred embodiment, by using insulating materials to make the grid plate, the aging process of the grid plate can be avoided after being charged, and the design is more reasonable and more practical.

[0021] Beneficial effects of the utility model:

[0022] The utility model arranges raised conductive contacts on the conductive bottom plate at the bottom of the positioning grid, and utilizes the conductive contacts to contact the silvered area of ​​the zinc oxide varistor ceramic sheet. Regardless of deformation that occurs during processing or use of the conductive bottom plate, as long as the deformation is not very serious, the utility model can ensure good contact and avoid the occurrence of misscreening.

[0023] The utility model can ensure the flatness of the zinc oxide varistor ceramic sheet when it is placed, avoid the consequences of poor contact caused by tilt, and further ensure good contact ability by setting at least three conductive contacts and distributing them in the form of regular triangles or regular polygons.

[0024] The utility model realizes soft contact between the zinc oxide varistor ceramic sheet and the conductive bottom plate by elastically connecting the conductive contact point and the conductive bottom plate via a conductive spring, thereby avoiding hard damage caused by hard contact during aging. The utility model has reasonable design and strong practicality.

[0025] The utility model limits the conductive contact by arranging the cover plate and the bell mouth, so that production and installation are more convenient and the structural design is more reasonable.

[0026] The utility model arranges structural through holes at the places corresponding to the middle of the positioning grid on the conductive bottom plate and the front cover plate. Since the conductive bottom plate is a metal plate and needs to withstand the pressure applied by another electrode during the aging process, its thickness cannot be too thin, so it is heavy, which makes it difficult for workers to carry it. The structural through holes arranged in this scheme can reduce the overall weight of the aging disk on the one hand, and reduce the deformable area in the positioning grid area on the other hand, thereby further ensuring good contact performance.

[0027] The utility model adopts insulating materials to make the grid plate, which can avoid the grid plate being affected by the aging process after being charged, and the design is more reasonable and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Attached Figure 2 For attachment Figure 1 A partial enlarged schematic diagram of

[0030] Attached Figure 3 It is a three-dimensional diagram of the utility model;

[0031] Attached Figure 4 It is a top plan view of the utility model.

[0032] Explanation of the reference numerals: 1-conductive bottom plate, 2-grid plate, 3-positioning grid, 4-conductive contact, 5-limiting hole, 6-conductive spring, 7-front cover plate, 8-bell mouth, 9-structural through hole. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the embodiments, but is not intended to be a basis for limiting the present invention.

[0034] Embodiments of the present utility model

[0035] A positioning plate for aging screening of zinc oxide varistor ceramics, as shown in the attached Figure 1-4 As shown, it includes a conductive base plate 1, the upper surface of which is covered with a grid plate 2, and a plurality of positioning grids 3 are distributed on the grid plate 2; the surface of the conductive base plate 1 at the bottom of the positioning grid 3 is provided with a conductive contact 4, and the contact point between the conductive contact 4 and the zinc oxide varistor ceramic is higher than the surface of the conductive base plate 1.

[0036] The shape of the positioning grid 3 of this embodiment is similar to that of the zinc oxide varistor ceramic sheet, and its area is slightly larger than that of the zinc oxide varistor ceramic sheet, and the conductive contact 4 is arranged in the middle area of ​​the bottom of the positioning grid 3. When in use, the zinc oxide varistor ceramic sheet is placed in the positioning grid 3 so that the silvered area on one side of it contacts the conductive contact 4, and then the aging tray is placed in a fixed position in the aging cabinet, and the aging equipment is started after the door is closed to perform the aging treatment.

[0037] Further optimized implementation examples are attached Figure 1-4As shown, at least three conductive contacts 4 are provided on the conductive bottom plate 1 at the bottom of each positioning grid 3, and are distributed in a regular triangle or regular polygon. In this embodiment, the specific number of contacts 4 is 3, distributed in a regular triangle, and of course 4 or more can be set according to needs, but usually 3 contacts can ensure the flatness of the zinc oxide varistor ceramic sheet, and the contact points are sufficient, so there is no need to set more.

[0038] Further optimized implementation examples are attached Figure 1-4 As shown, a limiting hole 5 is provided on the conductive bottom plate 1 below the conductive contact 4 , and a conductive spring 6 is provided in the limiting hole 5 ; the conductive contact 4 is elastically connected to the conductive bottom plate 1 via the conductive spring 6 .

[0039] The limiting hole 5 of this embodiment is formed by punching directly on the conductive bottom plate 1. The conductive spring 6 is inserted into the limiting hole 5 and then the conductive contact 4 is placed. When the zinc oxide varistor is placed on the conductive contact 4, the conductive spring 6 is still in a relaxed state. When the contact of the other pole is pressed on the other side of the zinc oxide varistor, there is a certain pressure, so the conductive spring 6 is compressed, ensuring that the zinc oxide varistor has a certain retreat space, thereby avoiding hard compression.

[0040] Further optimized implementation examples are attached Figure 1-4 As shown, a front cover plate 7 is provided between the conductive bottom plate 1 and the grid plate 2, and a bell mouth 8 is provided on the front cover plate 7 at a position corresponding to the conductive contact 4, and the bell mouth 8 is inverted on the conductive contact 4 to limit it.

[0041] The cover plate 7 of this embodiment is mainly for better realization of the overall structure and convenience of equipment manufacturing, wherein the maximum diameter of the bell mouth 8 is larger than the diameter of the conductive contact 4, while the minimum diameter is smaller than the diameter of the conductive contact 4, thereby achieving the limitation of the conductive contact 4.

[0042] Further optimized implementation examples are attached Figure 1-4 As shown, the conductive bottom plate 1 and the front cover plate 7 are provided with structural through holes 9 at locations corresponding to the middle of the positioning grid 3 .

[0043] The structural through hole 9 of this embodiment is opened according to actual conditions, and the hole diameter is based on hollowing out as much as possible, but cannot exceed the designed position of the conductive contact 4.

[0044] Further optimized implementation examples are attached Figure 1-4 As shown, the grid plate 2 is made of insulating material. The aging cabinet has a certain high temperature during aging, so the grid plate 2 needs to be made of insulating material with a certain high temperature ability to avoid direct high temperature damage to the grid plate 2 during the aging process.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and the utility model of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A positioning plate for aging screening of zinc oxide varistor ceramics, characterized in that: The invention comprises a conductive bottom plate (1), the upper surface of the conductive bottom plate (1) is covered with a grid plate (2), and a plurality of positioning grids (3) are distributed on the grid plate (2); a conductive contact (4) is provided on the surface of the conductive bottom plate (1) at the bottom of the positioning grid (3), and the contact point between the conductive contact (4) and the zinc oxide varistor ceramic is higher than the surface of the conductive bottom plate (1).

2. The positioning plate for aging screening of zinc oxide varistor ceramics according to claim 1, characterized in that: At least three conductive contacts (4) are arranged on the conductive base plate (1) at the bottom of each positioning grid (3) and are distributed in the form of a regular triangle or a regular polygon.

3. The positioning plate for aging screening of zinc oxide varistor ceramics according to claim 1, characterized in that: A limiting hole (5) is provided on the conductive bottom plate (1) below the conductive contact (4), and a conductive spring (6) is provided in the limiting hole (5); the conductive contact (4) and the conductive bottom plate (1) are elastically connected via the conductive spring (6).

4. The positioning plate for aging screening of zinc oxide varistor ceramics according to claim 3, characterized in that: A front cover plate (7) is provided between the conductive bottom plate (1) and the grid plate (2); a bell mouth (8) is provided on the front cover plate (7) at a position corresponding to the conductive contact (4); the bell mouth (8) is buckled on the conductive contact (4) and limits the position of the conductive contact (4).

5. The positioning plate for aging screening of zinc oxide varistor ceramics according to claim 4, characterized in that: The conductive bottom plate (1) and the front cover plate (7) are provided with structural through holes (9) at locations corresponding to the middle of the positioning grid (3).

6. The positioning plate for aging screening of zinc oxide varistor ceramics according to claim 1, characterized in that: The grid plate (2) is made of insulating material.

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