Vacuum positioning fixture for the fusion sealing of special-shaped glass and metal

Abstract

The utility model is suitable for glass and metal sealing tool technical field provides a kind of vacuum positioning fixture for special-shaped glass and metal fusion sealing, including positioning base, the positioning groove is established in the top side of positioning base, the bottom of positioning groove is distributed with vacuum adsorption hole, in the utility model, can place special-shaped glass by the positioning groove of positioning base top;With the elastic clamping block of zirconia ceramic material, by the fine adjustment of guide rod and connecting bolt, the flexible clamping of special-shaped glass edge can be realized, so as to avoid the glass breakage caused by rigid clamping, the vacuum adsorption hole of positioning groove bottom even distribution, after being communicated with sealing furnace vacuum generator by vacuum passage, even negative pressure adsorption force can be formed, special-shaped glass is fixed firmly in positioning groove, especially for big curvature, thin special-shaped glass, glass sliding in sealing process can be effectively prevented, the positioning stability of flexible clamping is further supplemented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to glass and metal sealing tool technical field, especially relate to a vacuum positioning fixture for the fusion sealing of special-shaped glass and metal. BACKGROUND

[0002] In the field of modern material processing and manufacturing, the fusion sealing technology of special-shaped glass and metal is becoming increasingly important and is widely used in high-end industries such as aerospace, optical instruments, and electronic packaging. Special-shaped glass has unique optical properties, good chemical stability, and insulation, while metal materials have excellent mechanical strength, electrical conductivity, and thermal conductivity. By combining the two through fusion sealing, the advantages of both can be integrated to create a new type of composite component with excellent performance.

[0003] The existing positioning fixture is mostly standardized structure, which cannot adapt to the irregular shape of special-shaped glass and metal, is easy to deviate from the position, causes the sealing interface to be misaligned, and most of the fixtures lack effective vacuum sealing structure, so air residues during the sealing process can cause the glass and metal to oxidize, produce bubbles, and affect the sealing air tightness. Therefore, a vacuum positioning fixture for the fusion sealing of special-shaped glass and metal is needed to solve the above problems. SUMMARY

[0004] The purpose of the utility model embodiment is to provide a vacuum positioning fixture for the fusion sealing of special-shaped glass and metal to solve the problems raised in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A vacuum positioning fixture for the fusion sealing of special-shaped glass and metal, comprising a positioning base, a positioning groove is formed on one side of the top of the positioning base, vacuum suction holes are distributed on the bottom of the positioning groove, a vacuum channel is connected to the bottom of the vacuum suction holes, a connecting pipeline is connected to one side of the vacuum channel, a support plate is connected to one side of the positioning groove, a thermal insulation layer is connected to one side of the support plate, a limiting plate and a fixed block are connected to the top of one end of the positioning base, one of the limiting plates is connected to the fixed block by a connecting bolt, a connecting plate is threadedly connected to the outside of the connecting bolt, guide rods are connected to both ends of one side of the connecting plate, and elastic clamping blocks are connected to one end of the guide rods.

[0007] Further technical solutions, the connecting pipeline is connected to the vacuum generator in the sealing furnace, and a thermal compensation groove is formed on the bottom of the positioning base.

[0008] In a further technical solution, the top of the positioning base is connected to a cavity sidewall, the bottom of the cavity sidewall is connected to a fixing bolt by a thread, the top of the cavity sidewall is connected to a sealing cover plate by a fixing bolt, and a metal-clad sealing gasket is connected between the sealing cover plate, the cavity sidewall and the positioning base. The metal-clad sealing gasket is made of copper-clad graphite material.

[0009] A further technical solution is provided, wherein a connecting block is connected to the bottom of one side of the sealing cover, and a fixing block is connected to the bottom of the connecting block. The fixing block is made of high-temperature fluororubber. A double vacuum interface is connected through one side of the cavity sidewall, and a venting valve is connected through the other side of the cavity sidewall. The double vacuum interface is connected to a high-vacuum molecular pump and a vacuum gauge, respectively. The venting valve is connected to an inert gas generator. The fixing block is connected to the top of the irregularly shaped glass.

[0010] In a further technical solution, the number of vacuum adsorption holes is nine, and a heat-conducting layer is connected to the bottom of the positioning base through an opening groove. The heat-conducting layer is made of copper heat-conducting block material, the heat insulation layer is made of alumina ceramic sheet material, and a heat transfer plate is connected to the top of the heat-conducting layer. The heat transfer plate is located at the bottom of the irregular glass and the metal part.

[0011] In a further technical solution, the guide rod is connected to the limiting plate through the guide rod, and the elastic clamp is made of zirconia ceramic.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention allows for the placement of irregularly shaped glass via a positioning groove on the top of the positioning base. Combined with an elastic clamping block made of zirconia ceramic, and through fine-tuning of the guide rod and connecting bolts, the edges of the irregularly shaped glass can be flexibly clamped, thus preventing glass breakage caused by rigid clamping. The uniformly distributed vacuum adsorption holes at the bottom of the positioning groove, connected to the vacuum generator of the sealing furnace via a vacuum channel, can form a uniform negative pressure adsorption force, firmly fixing the irregularly shaped glass within the positioning groove. This is particularly effective for large-curvature, thin irregularly shaped glass, preventing glass slippage during the sealing process and further enhancing the positioning stability of the flexible clamping.

[0014] This invention features a sealed cavity formed by a sealing cover, cavity sidewalls, and a positioning base. Combined with a copper-coated graphite metal-coated sealing gasket, it effectively blocks the flow of air between the cavity and the outside. Simultaneously, a high-temperature fluororubber fixing block at the bottom of the sealing cover not only compresses irregularly shaped glass but also fills the tiny gaps between the glass and the cover, creating a double protection of a sealed cavity sidewall and a sealed cover and glass. Furthermore, dual vacuum interfaces connect to a high-vacuum molecular pump and a vacuum gauge, respectively, allowing for real-time monitoring of the vacuum status. This avoids the glass-metal oxidation problem caused by traditional fixtures relying solely on the overall vacuum of the sealing furnace and localized air residue.

[0015] In order to make the structure characteristics and functions of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the positioning base of the main body of the utility model;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the front view section of the main body of the utility model;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the top view section of the main body of the utility model.

[0020] In the figure: 1, positioning base; 2, positioning groove; 3, vacuum suction hole; 4, vacuum channel; 5, connecting pipeline; 6, support plate; 7, thermal insulation layer; 8, limiting plate; 9, fixed block; 10, connecting bolt; 11, connecting plate; 12, guide rod; 13, elastic clamping block; 14, cavity side wall; 15, sealing cover plate; 16, fixing bolt; 17, connecting block; 18, fixed pressing block; 19, thermal compensation groove; 20, heat conduction layer; 21, emptying valve; 22, double vacuum interface; 23, metal-coated sealing gasket; 24, heat transfer plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0022] The specific implementation of the utility model will be described in detail below in combination with specific embodiments.

[0023] As Figures 1-4As shown, this utility model embodiment provides a vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal, including a positioning base 1. A positioning groove 2 is provided on one side of the top of the positioning base 1. Vacuum adsorption holes 3 are distributed at the bottom of the positioning groove 2. A vacuum channel 4 is connected to the bottom of the vacuum adsorption holes 3. A connecting pipe 5 is connected to one side of the vacuum channel 4. A support plate 6 is connected to one side of the positioning groove 2. A thermal insulation layer 7 is connected to one side of the support plate 6. A limiting plate 8 and a fixing block 9 are connected to the top of one end of the positioning base 1. There are two limiting plates 8. A connecting bolt 10 is connected between one of the limiting plates 8 and the fixing block 9. A connecting plate 11 is threadedly connected to the outside of the connecting bolt 10. A guide rod 12 is connected to one side of both ends of the connecting plate 11. An elastic clamping block 13 is connected to one end of the guide rod 12.

[0024] In this embodiment, the irregularly shaped glass is slowly placed into the positioning groove 2, ensuring that the glass fits tightly against the positioning groove 2 and that the sealing surface of the glass is initially aligned with the sealing surface of the metal part. The sealing cover plate 15 is placed on the side wall 14 of the cavity, and a high-temperature fluororubber fixing block 18 is placed at the contact point between the cover plate and the glass. The cover plate is initially fixed to the side wall with the fixing bolt 16. The connecting bolt 10 is slowly rotated with a wrench to push the connecting plate 11 and the guide rod 12, so that the elastic clamp 13 gradually fits against the edge of the irregularly shaped glass and the metal part. The vacuum generator of the sealing furnace is started, and the vacuum adsorption hole 3 in the positioning groove 2 is evacuated through the connecting pipe 5 to adsorb and fix the glass. The metal part to be sealed is placed next to the support plate 6 of the positioning base 1, ensuring that the sealing surface of the metal part is aligned with the edge of the positioning groove 2. The high vacuum molecular pump is started to evacuate the sealing cavity, and the vacuum gauge reading is observed in real time. Then the molecular pump is turned off to maintain the vacuum state.

[0025] like Figure 2 , Figure 3 and Figure 4 As shown, specifically, the connecting pipe 5 is connected to the vacuum generator in the sealing furnace, and the bottom of the positioning base 1 is provided with a heat compensation groove 19.

[0026] The top of the positioning base 1 is connected to the cavity sidewall 14, the bottom of the cavity sidewall 14 is connected to the fixing bolt 16 by thread, the top of the cavity sidewall 14 is connected to the sealing cover plate 15 by the fixing bolt 16, and a metal-clad sealing gasket 23 is connected between the sealing cover plate 15, the cavity sidewall 14 and the positioning base 1. The metal-clad sealing gasket 23 is made of copper-clad graphite.

[0027] A connecting block 17 is connected to the bottom of one side of the sealing cover plate 15. A fixing block 18 is connected to the bottom of the connecting block 17. The fixing block 18 is made of high-temperature fluororubber. A double vacuum interface 22 is connected through one side of the cavity side wall 14. A venting valve 21 is connected through the other side of the cavity side wall 14. The double vacuum interface 22 is connected to a high vacuum molecular pump and a vacuum gauge, respectively. The venting valve 21 is connected to an inert gas generator. The fixing block 18 is connected to the top of the irregularly shaped glass.

[0028] There are nine vacuum adsorption holes 3. The bottom of the positioning base 1 is connected to the heat-conducting layer 20 through the groove. The heat-conducting layer 20 is made of copper heat-conducting block material. The heat insulation layer 7 is made of alumina ceramic sheet material. The top of the heat-conducting layer 20 is connected to the heat transfer plate 24, which is located at the bottom of the irregular glass and metal parts.

[0029] The guide rod 12 is connected to the limiting plate 8 through the rod, and the elastic clamp 13 is made of zirconia ceramic.

[0030] In this embodiment, the heat insulation layer 7 made of alumina ceramic sheet can block the transfer of heat from the base to the non-sealing area of ​​the irregular glass, avoiding cracking due to excessive local temperature difference. The heat-conducting layer 20 is attached to the base through high-temperature thermally conductive silicone grease, which can quickly and evenly transfer the heat of the sealing furnace to the sealing interface, ensuring stable sealing temperature and improving sealing quality. The elastic clamp 13 is made of zirconia ceramic, which ensures uniform force during clamping and avoids local stress concentration in the glass. The guide rod 12 is made of titanium alloy, which penetrates the sealing cover plate 15 and is fixedly connected to the elastic clamp 13, restricting the elastic clamp 13 to move only in the vertical direction and preventing horizontal deviation. The copper-coated graphite metal-coated sealing gasket 23 and the high-temperature fluororubber fixing block 18 in the contact area between the sealing cover plate 15 and the irregular glass achieve double sealing, ensuring the airtightness of the cavity and meeting the high-temperature sealing requirements.

[0031] The working principle of this utility model is as follows: First, the irregularly shaped glass is slowly placed into the positioning groove 2, ensuring that the glass and the positioning groove 2 are tightly fitted, and the sealing surface of the glass is initially aligned with the sealing surface of the metal part. The sealing cover plate 15 is placed on the side wall 14 of the cavity, and a high-temperature fluororubber fixing block 18 is placed at the contact point between the cover plate and the glass. The cover plate and the side wall are initially fixed with fixing bolts 16. The connecting bolts 10 are slowly rotated with a wrench to push the connecting plate 11 and the guide rod 12, so that the elastic clamp 13 gradually fits the edge of the irregularly shaped glass and the metal part. Then, the vacuum generator of the sealing furnace is started, and the vacuum adsorption hole in the positioning groove 2 is activated through the connecting pipe 5. 3. Vacuuming is performed to adsorb and fix the glass. The metal part to be sealed is placed next to the support plate 6 of the positioning base 1, ensuring that the sealing surface of the metal part is aligned with the edge of the positioning groove 2. The high vacuum molecular pump is started to evacuate the sealed cavity, and the vacuum gauge reading is observed in real time. Then the molecular pump is turned off to maintain the vacuum state. Finally, the heat insulation layer 7 made of alumina ceramic sheet can block the heat from the base from being transferred to the non-sealing area of ​​the irregular glass, avoiding excessive local temperature difference and cracking of the glass. The heat-conducting layer 20 is attached to the base through high-temperature thermal grease, which can quickly and evenly transfer the heat of the sealing furnace to the sealing interface, ensuring stable sealing temperature.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal, comprising a positioning base (1), characterized in that; The positioning base (1) has a positioning groove (2) on one side of its top. Vacuum adsorption holes (3) are distributed at the bottom of the positioning groove (2). Vacuum adsorption holes (3) are connected to a vacuum channel (4) at the bottom. A connecting pipe (5) is connected to one side of the vacuum channel (4). A support plate (6) is connected to one side of the positioning groove (2). A heat insulation layer (7) is connected to one side of the support plate (6). A limiting plate (8) and a fixing block (9) are connected to the top of one end of the positioning base (1). There are two limiting plates (8). A connecting bolt (10) is connected between one of the limiting plates (8) and the fixing block (9). A connecting plate (11) is threaded to the outside of the connecting bolt (10). A guide rod (12) is connected to one side of both ends of the connecting plate (11). An elastic clamp (13) is connected to one end of the guide rod (12).

2. The vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal according to claim 1, characterized in that: The connecting pipe (5) is connected to the vacuum generator in the sealing furnace, and the bottom of the positioning base (1) is provided with a heat compensation groove (19).

3. The vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal according to claim 1, characterized in that: The top of the positioning base (1) is connected to a cavity sidewall (14), the bottom of the cavity sidewall (14) is connected to a fixing bolt (16) by a thread, the top of the cavity sidewall (14) is connected to a sealing cover plate (15) by a fixing bolt (16), and a metal-clad sealing gasket (23) is connected between the sealing cover plate (15), the cavity sidewall (14) and the positioning base (1). The metal-clad sealing gasket (23) is made of copper-clad graphite.

4. The vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal according to claim 3, characterized in that: A connecting block (17) is connected to the bottom of one side of the sealing cover plate (15), and a fixing block (18) is connected to the bottom of the connecting block (17). The fixing block (18) is made of high-temperature fluororubber. A double vacuum interface (22) is connected through one side of the cavity sidewall (14), and a venting valve (21) is connected through the other side of the cavity sidewall (14). The double vacuum interface (22) is connected to a high vacuum molecular pump and a vacuum gauge, respectively. The venting valve (21) is connected to an inert gas generator. The fixing block (18) is connected to the top of the irregular glass.

5. The vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal according to claim 1, characterized in that: The number of vacuum adsorption holes (3) is nine. The bottom of the positioning base (1) is connected to a heat-conducting layer (20) through a groove. The heat-conducting layer (20) is made of copper heat-conducting block material. The heat insulation layer (7) is made of alumina ceramic sheet material. The top of the heat-conducting layer (20) is connected to a heat transfer plate (24). The heat transfer plate (24) is located at the bottom of the irregular glass and metal parts.

6. The vacuum positioning fixture for fusion sealing of irregularly shaped glass and metal according to claim 1, characterized in that: The guide rod (12) is connected through the limiting plate (8), and the elastic clamp (13) is made of zirconia ceramic.

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