High-precision fluorescent screen sealing tool

Abstract

The high-precision fluorescent screen sealing tool comprises a sealing base plate, a limiting column, a powder pressing ring and a pressing block, the sealing base plate is cylindrical and plays a positioning role, the limiting column is inserted into the sealing base plate and is a stepped cylinder and plays a guiding role, the outer surface of the upper end of the limiting column is movably connected with the powder pressing ring, and the pressing block is connected with the powder pressing ring. The powder pressing ring has a mold forming effect, and the upper end of the sealing base plate is connected with a pressing block in a sleeved mode. The tool has the advantages that the tool is provided with the common sealing base plate, the positioning and supporting effects are achieved when a workbench is filled with powder, and the limiting effect is achieved in the sintering process of a high-temperature furnace. In the process, the steps of screen flange ring dismounting, powder prying and loosening and secondary mounting are avoided, the coaxiality is effectively guaranteed, the powder blank is softened in the sintering environment, downward pressure is generated through the self weight of the pressing block, the optical fiber panel is pressed to the positioning face of the sealing base plate, and the parallelism after sealing is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fluorescent screen sealing technology, and in particular to high-precision fluorescent screen sealing fixtures. Background Technology

[0002] Image intensifiers (IIMs) are devices used to detect and identify targets. The fluorescent screen, a crucial component, transforms invisible electronic images into visible optical images. During IIM fabrication, the fiber optic panel and screen flange ring must first be sealed using glass solder. The sealing quality affects the overall parallelism and leakage rate of the fluorescent screen. The parallelism of the fluorescent screen is closely related to the back proximity of the IIM; poor back proximity increases the probability of discharge between the IIM microchannel plate and the fluorescent screen, reducing the IIM's production yield and also affecting its resolution. Traditional IIM sealing methods involve preparing a glass solder paste, coating it onto the inside of the screen flange ring, and then assembling and sealing the fiber optic panel with the flange ring after drying. This method cannot guarantee that the parallelism of the fluorescent screen meets the standards after sealing. Furthermore, the dried glass solder paste remains powdery, easily adhering to the fiber optic panel's input surface during assembly, affecting surface cleanliness. Therefore, we designed a high-precision fluorescent screen sealing fixture. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0004] Therefore, one objective of this utility model is to propose a high-precision fluorescent screen sealing fixture to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, one embodiment of the present invention provides a high-precision fluorescent screen sealing fixture, including a sealing base, a limiting post, a powder pressing ring, and a pressing block. The sealing base is cylindrical and serves a positioning function. A limiting post is inserted inside the sealing base, and the limiting post is a stepped cylinder that serves a guiding function.

[0006] A powder pressure ring is movably connected to the upper outer surface of the limiting post, and the powder pressure ring has a mold forming function.

[0007] A pressure block is fitted onto the upper end of the sealing chassis. The pressure block is cylindrical and presses the optical fiber panel against the limiting surface by its own weight.

[0008] Preferably, in any of the above embodiments, the sealing chassis includes a stepped surface, an inner circle, and a limiting surface. The inner hole of the sealing chassis has a stepped surface, which serves as the positioning surface for the screen flange ring, and the inner circle is a positioning hole for the limiting post.

[0009] Preferably, in any of the above embodiments, the limiting post includes a cylindrical surface, which acts as a shield to the side during the powder filling process and guides the powder pressing ring downwards.

[0010] Preferably, as described in any of the above embodiments, the bottom end of the powder compression ring has a mold structure, and the powder compression ring includes an exhaust hole.

[0011] The above technical solution is adopted as follows: (1) The tooling design has a shared sealing base, which plays a positioning and supporting role when the powder is filled on the worktable, and a limiting role during high-temperature furnace sintering. This process avoids disassembling the screen flange ring, loosening the powder, and secondary installation steps, effectively ensuring coaxiality.

[0012] (2) The powder blank softens in the sintering environment and generates a downward pressure through the weight of the pressing block itself, pressing the optical fiber panel onto the sealing base positioning surface, effectively ensuring the parallelism after sealing.

[0013] Preferably, in any of the above schemes, the pressing block includes a large inner circle and a small inner circle, wherein the large inner circle mates with the outer circle of the sealing base, and the small inner circle mates with the outer circle of the optical fiber panel. Under the action of gravity and the softening of the blank ring at high temperature, the top end presses the optical fiber panel to the limiting surface of the sealing base.

[0014] The core advantages of this sealing fixture are: simple fixture structure, convenient parts replacement, and effective guarantee of the parallelism and coaxiality of the fluorescent screen after sealing. The structural design is simple and easy to operate. Simply place the screen flange ring and limiting post into the sealing base; no precise positioning is required during the process, as the powder compression ring and limiting post provide good guidance. The sealing base uses shared positioning parts to support the powder sealing and powder sintering processes, avoiding secondary assembly steps, significantly improving work efficiency, and ensuring consistent sealing dimensions.

[0015] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0016] 1. This high-precision fluorescent screen sealing fixture, through the coordinated arrangement of a sealing base, limiting posts, powder sealing ring, and pressure block, features a simple structure and convenient parts replacement, effectively ensuring the parallelism and coaxiality of the fluorescent screen after sealing. The simple structural design makes it easy to operate. Simply place the screen flange ring and limiting posts into the sealing base; no precise positioning is required during the process, as the powder sealing ring and limiting posts provide excellent guidance. The sealing base is a shared positioning component, supporting the powder sealing and powder sintering processes, avoiding secondary assembly steps, significantly improving work efficiency, and ensuring consistent sealing dimensions.

[0017] 2. This high-precision fluorescent screen sealing fixture features a shared sealing base, which provides positioning and support during powder filling on the worktable and acts as a limiting element during high-temperature furnace sintering. This process avoids disassembling the screen flange ring, loosening the powder, and requiring secondary installation steps, effectively ensuring coaxiality.

[0018] The powder blank softens in the sintering environment, and the weight of the pressing block generates a downward pressure to press the optical fiber panel onto the positioning surface of the sealing base, effectively ensuring the parallelism after sealing.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the pressure sealing blank ring of this utility model;

[0023] Figure 3 This is a schematic diagram of the sealing process of this utility model.

[0024] In the diagram: 1-Sealing base, 1a-Stepped surface, 1b-Inner circle, 1c-Limiting surface, 2-Limiting post, 2a-Cylindrical surface, 3-Powder pressure ring, 3a-Exhaust hole, 4-Pressure block, 4a-Large inner circle, 4b-Small inner circle, 5-Product, 6-Blank ring, 7-Screen flange ring, 8-Fiber optic panel. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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.

[0027] like Figure 1-3 As shown, this high-precision fluorescent screen sealing fixture includes a sealing base 1, a limiting post 2, a powder pressing ring 3, and a pressing block 4. The sealing base 1 is cylindrical and serves a positioning function. The limiting post 2 is inserted into the inside of the sealing base 1. The limiting post 2 is a stepped cylinder and serves a guiding function.

[0028] A powder pressure ring 3 is movably connected to the upper outer surface of the limiting post 2, and the powder pressure ring 3 has a mold forming function.

[0029] A pressure block 4 is fitted onto the upper end of the sealing base 1. The pressure block 4 is cylindrical and presses the fiber optic panel against the limiting surface by its own weight.

[0030] Example 1: The sealing base 1 includes a stepped surface 1a, an inner circle 1b, and a limiting surface 1c. The inner hole of the sealing base 1 has the stepped surface 1a, which serves as the positioning surface for the screen flange ring. The inner circle 1b is the positioning hole for the limiting post 2. The limiting post 2 includes a cylindrical surface 2a, which acts as a shield for the side during powder filling and guides the powder pressure ring 3 downwards.

[0031] Example 2: The bottom end of the powder pressing ring 3 has a mold structure, and the powder pressing ring 3 includes an exhaust hole 3a. The tooling design includes a common sealing base 1, which serves as a positioning and support when the powder is filled on the worktable, and as a limiting function during high-temperature furnace sintering. This process avoids disassembling the screen flange ring, loosening the powder, and secondary installation steps, effectively ensuring coaxiality.

[0032] The powder blank softens in the sintering environment, and the weight of the pressing block 4 generates a downward pressure, pressing the optical fiber panel onto the positioning surface of the sealing base 1, effectively ensuring parallelism after sealing. The pressing block 4 includes a large inner circle 4a and a small inner circle 4b, wherein the large inner circle 4a mates with the outer circle of the sealing base 1, and the small inner circle 4b mates with the outer circle of the optical fiber panel. Under the softening of the blank ring at high temperature and the action of gravity, the top of the pressing block presses the optical fiber panel onto the limiting surface 1c of the sealing base 1.

[0033] The working principle of this utility model is as follows:

[0034] The sealing base 1 is cylindrical in shape, with a stepped surface 1a in the inner hole serving as the positioning surface for the screen flange ring 7, and the inner circle 1b serving as the positioning hole for the limit post 2.

[0035] The limiting post 2 is a stepped cylinder. The cylindrical surface 2a acts as a shield to the side during the powder filling process, and the cylindrical surface 2a guides the powder pressing ring 3 downward.

[0036] The powder pressing ring 3 has a mold structure at the bottom, which has the function of mold forming. The vent hole 3a plays the role of venting during the pressing process. The external force presses the powder into a blank ring. After forming, the powder pressing ring 3 is taken out first, then the limiting post 2 is taken out, and finally the optical fiber panel 8 and the pressing block 4 are placed in.

[0037] The pressure block 4 is cylindrical in shape. The large inner circle 4a fits with the outer circle of the sealing base 1, and the small inner circle 4b fits with the outer circle of the optical fiber panel 8. Under the action of gravity and the softening of the blank ring 6 at high temperature, the top of the pressure block presses the optical fiber panel 8 to the limiting surface 1c of the sealing base 1.

[0038] Compared with the prior art, the present invention has the following advantages:

[0039] 1. This high-precision fluorescent screen sealing fixture, through the coordinated arrangement of sealing base 1, limiting post 2, powder pressing ring 3, and pressing block 4, features a simple fixture structure, convenient parts replacement, and effectively ensures the parallelism and coaxiality of the fluorescent screen after sealing. The structural design is simple and easy to operate. Simply place the screen flange ring and limiting post 2 into the sealing base 1; no precise positioning is required during the process, as the powder pressing ring 3 and limiting post 2 provide good guidance. The sealing base 1 is a shared positioning component, supporting the powder sealing and powder sintering processes, avoiding secondary assembly steps, significantly improving work efficiency, and ensuring consistent sealing dimensions.

[0040] 2. This high-precision fluorescent screen sealing fixture features a shared sealing base 1, which serves for positioning and support during powder filling on the worktable and for limiting movement during high-temperature furnace sintering. This process avoids disassembling the screen flange ring, loosening the powder, and secondary installation steps, effectively ensuring coaxiality.

[0041] The powder blank softens in the sintering environment, and the weight of the pressing block 4 generates a downward pressure, pressing the optical fiber panel onto the positioning surface of the sealing base 1, effectively ensuring the parallelism after sealing.

Claims

1. A high-precision fluorescent screen sealing tool, characterized in that, Including sealing base (1), limit column (2), powder pressing ring (3) and pressing block (4), the sealing base (1) is cylindrical, and the sealing base (1) is inserted with limit column (2) inside, and the limit column (2) is stepped cylinder and is used as guide; The upper end outer surface of the limit column (2) is movably connected with the powder pressing ring (3), and the powder pressing ring (3) has a mold forming effect; The upper end of the sealing base (1) is sleeved with the pressing block (4), and the pressing block (4) is cylindrical, and the optical fiber panel is pressed to the limit surface by the self weight.

2. The high precision screen seal tooling of claim 1, wherein: The sealing base (1) includes stepped surface (1a), inner circle (1b) and limit surface (1c), the inner hole of the sealing base (1) is provided with the stepped surface (1a), and the stepped surface (1a) is used as the positioning surface of the screen flange ring; the inner circle (1b) is the positioning hole of the limit column (2).

3. The high precision screen seal tooling of claim 2, wherein: The limit column (2) includes cylindrical surface (2a), and the cylindrical surface (2a) shields the side surface during filling of powder, and the cylindrical surface (2a) guides the powder pressing ring (3) downward.

4. The high precision screen seal tooling of claim 3, wherein: The bottom end of the powder pressing ring (3) is provided with a model structure, and the powder pressing ring (3) includes exhaust hole (3a).

5. The high precision screen seal tooling of claim 4, wherein: The pressing block (4) includes large inner circle (4a) and small inner circle (4b), the large inner circle (4a) is matched with the outer circle of the sealing base (1), the small inner circle (4b) is matched with the outer circle of the optical fiber panel, and under the action of gravity and softening of the blank ring at high temperature, the top end presses the optical fiber panel to the limit surface (1c) of the sealing base (1).

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