Indium alloying jig

Abstract

The utility model discloses a kind of indium melting clamps, suitable for melting a indium layer on the sealing surface of tube shell or fluorescent screen, including indium melting clamp body and indium melting top pressure piece.The indium melting clamp body is equipped with the positioning cavity for the positioning of partially putting tube shell or fluorescent screen, the placement cavity for placing indium melting material and being located above the positioning cavity and the communication cavity for the communication of the placement cavity and the positioning cavity, the cavity diameter of the communication cavity is less than the cavity diameter of the placement cavity, the placement cavity is penetrated to the upper end surface of the indium melting clamp body upwards;The lower end of the indium melting top pressure piece is inserted into the placement cavity from the upper side of the indium melting clamp body, the lower end of the indium melting top pressure piece also presses indium melting material in the placement cavity under the weight of this indium melting top pressure piece;The positioning cavity is penetrated to the lower end surface of the indium melting clamp body downwards.The indium melting clamp of the utility model improves the efficiency of melting a indium layer on the sealing surface of tube shell or fluorescent screen.

Description

Technical Field

[0001] This utility model relates to the technical field of image tube manufacturing, and in particular to an indium chloride fixture. Background Technology

[0002] An image tube, also known as an image intensifier, is a vacuum optoelectronic device that uses the photoelectric effect to convert weak light signals into visible light images. It is a type of low-light detector.

[0003] The image tube consists of a shell, a photocathode, and a fluorescent screen, with the shell located between the photocathode and the fluorescent screen. To ensure the image tube's airtightness, a sealed connection is required between the shell and the photocathode, and between the shell and the fluorescent screen.

[0004] Currently, in the process of sealing the connection between the tube shell and the photocathode, indium chloride material needs to be melted onto the sealing surface of the tube shell to melt an indium layer on the sealing surface. Then, the photocathode and the indium layer of the tube shell are pressure-sealed by a pressure sealing mechanism to achieve the purpose of sealing between the photocathode and the tube shell.

[0005] However, the existing process of melting indium chloride onto the sealing surface of the tube shell to obtain an indium layer has the drawback of low efficiency in melting the indium layer.

[0006] Therefore, there is an urgent need for an indium chloride fixture to overcome the above-mentioned defects. Utility Model Content

[0007] The purpose of this invention is to provide an indium melting fixture that improves the efficiency of melting an indium layer on the sealing surface of a tube shell or fluorescent screen.

[0008] To achieve the above objectives, the indium chloride clamp of this utility model is suitable for melting an indium layer on the sealing surface of a tube shell or fluorescent screen, and includes an indium chloride clamp body and an indium chloride pressing member. The indium chloride clamp body has a positioning cavity for partially placing and positioning the tube shell or fluorescent screen, a placement cavity for placing indium chloride material and located above the positioning cavity, and a connecting cavity connecting the placement cavity and the positioning cavity. The diameter of the connecting cavity is smaller than the diameter of the placement cavity. The placement cavity extends upward through the upper end face of the indium chloride clamp body. The lower end of the indium chloride pressing member extends into the placement cavity from above the indium chloride clamp body. The lower end of the indium chloride pressing member also presses down on the indium chloride material in the placement cavity under its own weight. The positioning cavity extends downward through the lower end face of the indium chloride clamp body.

[0009] Compared with existing technologies, the design of "the indium chloride fixture body having a positioning cavity for partially placing and positioning the tube shell or fluorescent screen, a placement cavity for placing indium chloride material and located above the positioning cavity, and a connecting cavity connecting the placement cavity and the positioning cavity with a smaller diameter than the placement cavity, the placement cavity extending upward through the upper end face of the indium chloride fixture body" ensures that the sealing surface of the tube shell or fluorescent screen is positioned and stabilized by the indium chloride fixture body before melting an indium layer, thus ensuring the reliability of subsequent indium layer melting; furthermore, the design of "the lower end of the indium chloride top pressure component extending from the top of the indium chloride fixture body into the placement cavity" ensures the reliability of subsequent indium layer melting. The design of "the lower end of the indium chloride top pressure member in the placement cavity presses down on the indium chloride material in the placement cavity under its own weight" is designed so that during the process of melting an indium layer on the sealing surface of the tube shell or fluorescent screen, the indium chloride material melted in the placement cavity can quickly pass through the connecting cavity and enter the sealing surface of the tube shell or fluorescent screen under the combined action of its own weight and the downward pressure of the indium chloride top pressure member, thereby improving the efficiency of melting an indium layer on the sealing surface of the tube shell or fluorescent screen; and since the downward pressure of the indium chloride material in the placement cavity is achieved by the weight of the indium chloride top pressure member, the structure is simplified.

[0010] Preferably, the connection between the communicating cavity and the positioning cavity is located on the cavity end face of the positioning cavity, and the connection between the communicating cavity and the placement cavity is located on the cavity end face of the placement cavity.

[0011] Preferably, a positioning boss protrudes downward from the end face of the positioning cavity and is located inside the positioning cavity, and the positioning boss is offset from the communicating cavity in a direction away from the cavity side of the positioning cavity.

[0012] Preferably, the side surface of the positioning cavity, the end face of the positioning cavity, and the positioning boss together define a recessed annular groove.

[0013] Preferably, the indium chloride clamp body is further provided with a chamfered structure for enlarging the opening of the positioning cavity.

[0014] Preferably, the indium chloride fixture body is further provided with a chamfered structure for enlarging the opening of the placement cavity.

[0015] Preferably, the lower end of the indium chloride pressing member is provided with a chamfer structure that narrows the lower end.

[0016] Preferably, both the indium chloride clamp body and the indium chloride top pressure member are made of graphite.

[0017] Preferably, the indium chloride pressing member includes an upper large column and a lower small column, the center lines of the small column and the large column coincide, and the lower end of the indium chloride pressing member is located on the small column.

[0018] Preferably, the small column is clearance-fitted with the placement cavity.

[0019] Preferably, the cross-section of the small column is circular, elliptical, or regular polygonal, and the placement cavity is a corresponding circular cavity, elliptical cavity, or regular polygonal cavity.

[0020] Preferably, the positioning cavity is a circular cavity, and the outer contour of the cross-section of the indium chloride clamp body is circular.

[0021] Preferably, the communicating cavity is a circular cavity.

[0022] Preferably, the placement cavities are a plurality of spaced-apart cavities arranged around the center line of the positioning cavity, each placement cavity corresponds to one indium chloride top pressure member, and each placement cavity is connected to the positioning cavity via the connecting cavity. Attached Figure Description

[0023] Figure 1 This is a perspective view of the indium chloride clamp applicable to tube shells according to this utility model.

[0024] Figure 2 yes Figure 1 The indium chloride fixture shown is viewed in the direction indicated by arrow A.

[0025] Figure 3 It is along Figure 2 Internal view of the section cut along the BB line.

[0026] Figure 4 Is Figure 3 The exploded view of the tube shell being removed from the indium chloride fixture.

[0027] Figure 5 This is a diagram showing the state of an indium layer melting onto the sealing surface of the tube shell.

[0028] Figure 6 This is a perspective view of the indium chloride clamp applicable to fluorescent screens according to this utility model.

[0029] Figure 7 yes Figure 6 The indium chloride fixture shown is viewed in the direction indicated by arrow A.

[0030] Figure 8 It is along Figure 7 Internal view of the section cut along the DD line.

[0031] Figure 9 Is Figure 8 The diagram shows the decomposition of the fluorescent screen when it is separated from the indium chloride fixture.

[0032] Figure 10 This is a diagram showing the state of an indium layer being melted onto the sealed surface of a fluorescent screen. Detailed Implementation

[0033] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0034] Please see Figures 1 to 4 The present invention relates to an indium chloride clamp 100 for a tube shell 210, comprising an indium chloride clamp body 10 and an indium chloride pressing member 20. The indium chloride clamp body 10 has a positioning cavity 11 for partially placing and positioning the tube shell 210, a placement cavity 12 for placing the indium chloride material 230 and located above the positioning cavity 11, and a connecting cavity 13 connecting the placement cavity 12 and the positioning cavity 11.

[0035] The diameter of the connecting cavity 13 is smaller than the diameter of the placement cavity 230 to prevent the indium chloride material 230 from entering the positioning cavity 11 from the connecting cavity 13 before it melts, thereby ensuring that the indium chloride material 230 melts an indium layer 212 on the sealing surface 211 of the tube shell 210 (see...). Figure 5 The reliability of the indium chloride material 230 in the placement cavity 12 is ensured by extending upward through the upper end face 14 of the indium chloride fixture body 10 and downward through the lower end face 15 of the indium chloride fixture body 10. Alternatively, as an example, the connection 113 between the connecting cavity 13 and the positioning cavity 11 is located on the cavity end face 111 of the positioning cavity 11, and the connection 123 between the connecting cavity 13 and the placement cavity 12 is located on the cavity end face 121 of the placement cavity 12. This design allows the indium chloride material 230 in the placement cavity 12 to flow more smoothly and reliably to the sealing surface 211 of the tube shell 210 positioned by the positioning cavity 11 after melting, thereby ensuring the reliability of the molten indium layer 212 on the sealing surface 211 of the tube shell 210 positioned by the positioning cavity 11.

[0036] The lower end 21 of the indium dissolver 20 extends from above the indium dissolver clamp body 10 into the placement cavity 12. Under its own weight, the lower end 21 of the indium dissolver 20 also presses down on the indium dissolver material 230 within the placement cavity 12. Optionally, in... Figure 1 , Figure 3 and Figure 4In this example, both the indium dissolver fixture body 10 and the indium dissolver top pressure component 20 are made of graphite. Since graphite has a melting point of 3650 degrees Celsius and the indium dissolver process operates at 500 degrees Celsius, the dimensions of the indium dissolver fixture 100 are extremely stable at this temperature, without softening, melting, or deformation, ensuring the geometric accuracy of the indium dissolver process. Furthermore, due to graphite's low coefficient of thermal expansion and excellent thermal conductivity, the indium dissolver fixture 100 will not crack or break due to drastic temperature changes during heating and cooling cycles. In addition, graphite layers slide easily between each other, exhibiting good self-lubricating properties. After indium melting is completed, the solidified indium layer 212 on the sealing surface 211 of the housing 210 will not adhere to the surface of the indium melting fixture body 10, making demolding easier and avoiding damage to the expensive housing 210 or the sealing surface 211 of the housing 210 due to adhesion. More specifically, see the description below.

[0037] like Figure 4 As shown, as an example, a positioning boss 1111 protrudes downward from the cavity end face 111 of the positioning cavity 11 and is located inside the positioning cavity 11. The positioning boss 1111 is offset from the communicating cavity 13 in a direction away from the cavity side face 112 of the positioning cavity 11. The cavity side face 112 of the positioning cavity 11, the cavity end face 111 of the positioning cavity 11, and the positioning boss 1111 together define a recessed annular groove 114. This design ensures that the indium layer 212 solidified on the sealing surface 211 of the tube shell 210 is arranged in an annular shape, and also meets the need for positioning the tube shell 210. In addition, the indium chloride clamp body 10 is also provided with a chamfered structure 16 for enlarging the cavity opening 11a of the positioning cavity 11, so as to facilitate the quick insertion or removal of the tube shell 210 into the positioning cavity 11. In addition, the indium dissolver fixture body 10 is provided with a chamfered structure 17 for enlarging the opening 12a of the placement cavity 12, so as to facilitate the insertion of the indium dissolver material 230 and the indium dissolver pressing member 20 into the placement cavity 12; alternatively, in Figure 3 and Figure 4 As an example, the lower end 21 of the indium chloride top pressure member 20 is provided with a chamfered structure 22 that reduces the size of the lower end 21. This design makes it easier to insert or remove the indium chloride top pressure member 20 from the placement cavity 12.

[0038] like Figure 1 , Figure 3 and Figure 4 As an example, the indium chloride top pressure member 20 includes an upper large pillar 20a and a lower small pillar 20b, the center line of the small pillar 20b and the large pillar 20a (see...). Figure 3The lower end 21 of the indium chloride pressing member 20 is located on the small pillar 20b, coinciding with the center line on the left side of the middle. This design further increases the weight of the indium chloride pressing member 20, thereby increasing the downward pressure of the indium chloride pressing member 20 on the indium chloride material 230 in the placement cavity 12. Specifically, in combination with Figure 1 , Figure 3 and Figure 4 As an example, the cross-section of the small cylinder 20b is circular, and correspondingly, the placement cavity 12 is a circular cavity. Obviously, depending on actual needs, the cross-section of the small cylinder 20b can also be elliptical or regular polygonal, and correspondingly, the placement cavity 12 is an elliptical cavity or a regular polygonal cavity. That is to say, the shape of the placement cavity 12 matches the shape of the small cylinder 20b. As another example, the small cylinder 20b and the placement cavity 12 are fitted with a gap. On the one hand, this satisfies the need for the indium chloride pressing member 20 to move downward relative to the indium chloride clamp body 10 under its own weight. On the other hand, it also satisfies the need for the indium chloride pressing member 20 to accelerate the liquid after the indium chloride material 230 is melted into the connecting cavity 13, effectively reducing the liquid of the indium chloride material 230 being melted and running upward through the gap between the small cylinder 20b and the placement cavity 12.

[0039] like Figures 1 to 4 As shown, as an example, the placement cavities 12 are two spaced apart from each other around the center line C of the positioning cavity 11. Each placement cavity 12 corresponds to an indium oxide pressing element 20, and each placement cavity 12 is connected to the positioning cavity 11 via a connecting cavity 13. This design increases the uniformity of the indium layer 212 solidified on the sealing surface 211 of the casing 210. Obviously, depending on actual needs, the number of placement cavities 12 can also be three, four, five, or more, so it is not limited to... Figures 1 to 4 The above is a limited description. Additionally, the positioning cavity 112 is a circular cavity, and the outer contour of the cross-section of the indium dissolver fixture body 10 is circular to facilitate the machining and fabrication of the indium dissolver fixture body 10 and to better match the outer contour of the tube shell 210. Furthermore, the connecting cavity 13 is a circular cavity; obviously, depending on actual needs, the connecting cavity 13 can also be an elliptical cavity or a regular polygonal cavity.

[0040] like Figures 1 to 4 As shown, as an example, the indium ion clamp body 10 also has a central hole 18 that runs vertically through the center. The central hole 18 passes through the positioning boss 1111 and communicates with the positioning cavity 11, so as to reduce the amount of material used by the indium ion clamp body 10 and reduce the weight of the indium ion clamp body 10.

[0041] Please read Figures 6 to 10 The indium chloride clamp 100' applicable to the fluorescent screen 220 and the indium chloride clamp 100 applicable to the tube shell 210 have basically the same structure, and the differences are described below.

[0042] (a) In the indium ionizer fixture 100' applicable to the fluorescent screen 220, the indium ionizer fixture body 10' does not have a chamfered structure for expanding the cavity opening 11a of the positioning cavity 11; in the indium ionizer fixture 100 applicable to the tube shell 210, the indium ionizer fixture body 10 has a chamfered structure 16 for expanding the cavity opening 11a of the positioning cavity 11.

[0043] (ii) The diameter of the central hole 18' of the indium ion clamp 100' is larger than the diameter of the central hole 18 of the indium ion clamp 100, so that the central part of the fluorescent screen 220 is placed in the central hole 18' under the positioning of the positioning cavity 11 and the positioning boss 1111, thereby providing a clearance position for the central part of the fluorescent screen 220.

[0044] Apart from the differences in (a) and (b) mentioned above, the indium dissolver fixture 100' and the indium dissolver fixture 100 have the same other structures, so they will not be described again here.

[0045] Compared with the prior art, by using the design of "the indium ionizer fixture body 10 (10') having a positioning cavity 11 for partially placing and positioning the tube shell 210 or fluorescent screen 220, a placement cavity 12 for placing the indium ionizer material 230 and located above the positioning cavity 11, and a connecting cavity 13 connecting the placement cavity 12 and the positioning cavity 11 and having a cavity diameter smaller than the placement cavity 12, the placement cavity 12 extending upward through the upper end face 14 of the indium ionizer fixture body 10 (10')", the sealing surface 211 (221) of the tube shell 210 or fluorescent screen 220 is first positioned and stabilized by the indium ionizer fixture body 10 (10') before melting an indium layer 212 (222), ensuring the reliability of the subsequent melting of the indium layer 212 (222); and by using the design of "the lower end 21 of the indium ionizer pressing member 20 extending from the top of the indium ionizer fixture body 10 (10')", the indium ionizer fixture body 10 (10') is able to securely position and stabilize the sealing surface 211 (221) of the tube shell 210 or fluorescent screen 220 before melting an indium layer 212 (222), ensuring the reliability of the subsequent melting of the indium layer 212 (222); and by using the design of "the lower end 21 of the indium ionizer pressing member 20 extending from the top of the indium ionizer fixture body 10 (10')", the indium ionizer fixture body 10 (10') is able to secure the indium ionizer material 230. In the placement cavity 12, the lower end 21 of the indium chloride top pressure member 20 is also pressed down on the indium chloride material 230 in the placement cavity 12 under its own weight. This design allows the indium chloride material 230 melted in the placement cavity 12 to quickly pass through the connecting cavity 13 and enter the sealing surface 211 (221) of the tube shell 210 or the fluorescent screen 220 under the combined action of its own weight and the downward pressure of the indium chloride top pressure member 20. This improves the efficiency of melting an indium layer 212 (222) on the sealing surface 211 (221) of the tube shell 210 or the fluorescent screen 220. Since the downward pressure of the indium chloride material 230 in the placement cavity 12 is achieved by the weight of the indium chloride top pressure member 20, the structure is simplified.

[0046] It should be noted that the indium material 230 mentioned above is an indium pillar, which can effectively prevent indium from being contaminated.

[0047] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. An indium melting fixture, suitable for melting an indium layer on the sealing surface of a tube shell or fluorescent screen, characterized in that, The device includes an indium chloride clamp body and an indium chloride pressing member. The indium chloride clamp body has a positioning cavity for partially placing and positioning a tube shell or fluorescent screen, a placement cavity for placing indium chloride material and located above the positioning cavity, and a connecting cavity connecting the placement cavity and the positioning cavity. The diameter of the connecting cavity is smaller than the diameter of the placement cavity. The placement cavity extends upward through the upper end face of the indium chloride clamp body. The lower end of the indium chloride pressing member extends into the placement cavity from above the indium chloride clamp body. The lower end of the indium chloride pressing member also presses down on the indium chloride material in the placement cavity under its own weight. The positioning cavity extends downward through the lower end face of the indium chloride clamp body.

2. The indium chloride clamp according to claim 1, characterized in that, The placement cavities are a plurality of cavities arranged apart from each other around the center line of the positioning cavity. Each placement cavity corresponds to an indium chloride top pressure member, and each placement cavity is connected to the positioning cavity via the connecting cavity.

3. The indium chloride clamp according to claim 1, characterized in that, The connection between the connecting cavity and the positioning cavity is located on the end face of the positioning cavity, and the connection between the connecting cavity and the placement cavity is located on the end face of the placement cavity.

4. The indium chloride clamp according to claim 1, characterized in that, The indium chloride top pressure member includes a large upper column and a small lower column, the center lines of which coincide with those of the large column, and the lower end of the indium chloride top pressure member is located on the small column.

5. The indium chloride clamp according to claim 4, characterized in that, The cross-section of the small column is circular, elliptical, or regular polygonal; the placement cavity is a corresponding circular cavity, elliptical cavity, or regular polygonal cavity; the small column and the placement cavity are fitted with a clearance.

6. The indium chloride clamp according to claim 1, characterized in that, A positioning boss protrudes downward from the end face of the positioning cavity and is located inside the positioning cavity. The positioning boss is offset from the communicating cavity in a direction away from the side of the positioning cavity.

7. The indium chloride clamp according to claim 6, characterized in that, The side surface of the positioning cavity, the end face of the positioning cavity, and the positioning boss together define a sunken annular groove.

8. The indium chloride clamp according to claim 1, characterized in that, The indium chloride fixture body is also provided with a chamfered structure for enlarging the opening of the positioning cavity.

9. The indium chloride clamp according to claim 1, characterized in that, The indium chloride clamp body is also provided with a chamfered structure for expanding the opening of the placement cavity, and the lower end of the indium chloride top pressure member is provided with a chamfered structure for narrowing the lower end; the indium chloride clamp body and the indium chloride top pressure member are both made of graphite.

10. The indium chloride clamp according to claim 1, characterized in that, The positioning cavity is a circular cavity, and the outer contour of the cross-section of the indium chloride clamp body is circular; the connecting cavity is a circular cavity.

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