A ceramic structural component welding positioning device

Abstract

This utility model belongs to the field of ceramic structural component processing technology, specifically a ceramic structural component welding positioning device. It includes a base platform (1), a bottom fitting plate (2), a positioning post (3), and a clamping block (8). The base platform (1) has a positioning groove (4) on its upper part, a positioning protrusion (5) on its lower part, a fitting plate through hole (6) in the center of the bottom fitting plate (2), a positioning post positioning protrusion (7) on the lower part of the positioning post (3), and a clamping block through hole (9) in the center of the clamping block (8). The ceramic structural component welding positioning device described in this utility model has a simple structure and can quickly and accurately achieve high-precision control of the coaxiality, perpendicularity, and welding gap between the aluminum nitride disc and the aluminum nitride tube. It possesses high versatility, is thermally stress-friendly, and improves the stability, repeatability, and consistency of the ceramic component welding process.

Description

Technical Field

[0001] This utility model belongs to the field of ceramic structural component processing technology, and more specifically, it relates to a ceramic structural component welding positioning device. Background Technology

[0002] Currently, in the field of ceramic structural component welding auxiliary equipment technology, the welding fixtures that have been disclosed and used are mostly used for heterogeneous bonding between ceramics and metals, such as brazing auxiliary fixtures for metal coils and alumina ceramics, and aluminum nitride substrates and molybdenum targets. The main structural feature of these fixtures is the use of fixed metal slots or rigid clamps to control the position of parts and maintain the assembly morphology during the welding process. For homogeneous welding between ceramics (such as the connection between aluminum nitride ceramic discs and aluminum nitride ceramic tubes), due to the hardness and brittleness of the materials and the high requirements for processing precision, there is currently a lack of dedicated fixtures on the market. Most fixtures are tooled in the following ways: 1. Graphite block slotting positioning: A positioning groove is machined in a graphite block, and the aluminum nitride disc or tube is embedded in it for simple alignment. This method has poor positioning accuracy, lacks adjustability, cannot adapt to various sizes or non-standard geometries, and the soft graphite material deforms severely after repeated heating, causing the workpiece position to shift. 2. Manual lap joint + spot welding positioning: The operator manually places the tube in the center of the disc through microscopic observation, aligns it, and then performs preheating spot welding. This method is highly dependent on the operator's experience, which not only has poor repeatability and low efficiency, but also easily causes ceramic surface contamination or misaligned welding. 3. Rigid clamping fixture: stainless steel or metal clamps are used to forcibly fix the disc and tube, but the rigid structure is difficult to release thermal expansion stress during heating, which causes cracks or broken edges in the ceramic components, seriously affecting the welding reliability, and the metal clamps are not resistant to high temperature. 4. Dedicated welding platform + glue dispensing assistance: Some high-end equipment uses a welding platform with vacuum adsorption or laser guidance, and at the same time, glue dispensing is used for positioning in the welding gap. However, such equipment is expensive, highly integrated, lacks versatility, and has high maintenance costs, making it unsuitable for small batch or customized production. The main problems and technical defects of the existing technology are as follows: (1) Insufficient positioning accuracy: Most fixtures cannot achieve high-precision control of coaxiality, perpendicularity and welding gap between aluminum nitride disc and aluminum nitride tube, resulting in an increase in welding defects (such as false welding, eccentricity, stress cracks, etc.). (2) Poor versatility: Most existing fixtures are single-specification customized structures, which are difficult to adapt to aluminum nitride disks or tubes with different diameters, heights and wall thicknesses. Replacing fixtures is costly and inefficient. (3) Poor thermal expansion buffering capacity: Most adopt metal or rigid structure positioning methods, without considering the difference in thermal expansion coefficients during high-temperature ceramic welding, which can easily cause ceramic components to break due to uneven stress. (4) Low loading and unloading efficiency: Traditional structures lack quick-release mechanisms, requiring manual adjustment of clamps or replacement of the entire component, resulting in longer assembly cycles, which is not conducive to laboratory iteration or pilot-scale mass production. (5) Poor welding consistency: Repeated positioning is difficult to accurately replicate, resulting in unstable welding morphology, dimensional accuracy and thermal cycling reliability between product batches, which limits its promotion in high-end packaging devices. Therefore, there is room for improvement in the existing technology.

[0003] Existing technology includes a method for preparing aluminum nitride ceramic structural components, titled "A Method for Preparing Aluminum Nitride Ceramic Structural Components," with publication number CN113896540A. This method discloses a method for preparing aluminum nitride ceramic structural components, comprising the following steps: Step 1: Preparing AlN ceramic substrates for each component unit; Step 2: Processing each ceramic substrate into component units that meet precision requirements; Step 3: Selecting component units to print silver-copper-titanium active paste; Step 4: Assembling and welding each component unit into a structural component; Step 5: Cleaning and inspecting the structural component. This invention divides the structural component into several small unit parts, prints silver-copper-titanium active paste on each unit part, and then assembles them into a structural component through a welding process. This method eliminates the need for CNC machining, and offers advantages such as easy control of individual precision, good consistency, high yield, low cost, and long-term use within a temperature range of -55℃ to 400℃.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a ceramic structural component welding positioning device that is simple in structure, can quickly and accurately achieve high-precision control of the coaxiality, perpendicularity and welding gap of aluminum nitride disk and aluminum nitride tube, has high versatility and is thermally stress-friendly, and improves the stability, repeatability and consistency of ceramic component welding process.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model is a welding positioning device for ceramic structural parts, including a base platform, a bottom fitting plate, a positioning post, and a clamping block. The upper part of the base platform is provided with a positioning groove, the lower part of the bottom fitting plate is provided with a positioning protrusion, the center of the bottom fitting plate is provided with a fitting plate through hole, the lower part of the positioning post is provided with a positioning post positioning protrusion, and the middle of the clamping block is provided with a clamping block through hole.

[0008] The clamping block is provided with a positioning step at its lower part.

[0009] The positioning groove is designed to hold a ceramic disc to be welded. The positioning groove and the ceramic disc are both cylindrical.

[0010] The positioning post is a hollow cylindrical structure, and the interior of the positioning post is designed to accommodate a ceramic tube, which is also a hollow cylindrical structure.

[0011] The positioning protrusion at the lower part of the bottom fitting plate is configured to be able to be locked onto the inner wall of the positioning groove at the upper part of the base platform.

[0012] The positioning protrusion of the positioning post is configured to be able to be engaged in the position inside the through hole of the bottom fitting plate, and the lower surface of the positioning post is configured to be able to be supported on the upper surface of the bottom fitting plate.

[0013] The positioning step at the bottom of the clamping block is configured to be able to be locked onto the outer wall of the upper end of the positioning post.

[0014] The upper end of the ceramic tube is configured to pass through the through hole of the clamping block in the middle of the clamping block.

[0015] The base platform is made of ceramic composite material or high-temperature resistant material, the bottom mounting plate is made of ceramic composite material or high-temperature resistant material, and the clamping block is made of ceramic composite material or high-temperature resistant material.

[0016] Both the ceramic disc and the ceramic tube are structures made of aluminum nitride ceramic.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] The ceramic structural component welding positioning device of this utility model comprises a base platform, a bottom fitting plate, a positioning post, and a clamping block. These components are used together to position and weld the ceramic disc and ceramic tube. A positioning groove is provided on the upper part of the base platform, into which the ceramic disc is placed. Welding material is pre-applied to the ceramic disc, positioned at the welding point between the ceramic disc and the ceramic tube. After the ceramic disc is in place, the bottom fitting plate is fastened to the upper surface of the base platform, and the positioning protrusion engages with the inner wall of the positioning groove, thus positioning the base platform and the bottom fitting plate and fixing the position of the ceramic disc. The positioning protrusion at the lower part of the positioning post can engage with the through hole in the center of the bottom fitting plate, achieving coaxiality and perpendicularity positioning between the positioning post and the bottom fitting plate. The ceramic tube is then inserted from above the hollow positioning post, with its lower part fitting against the ceramic disc. A clamping block is then placed on top of the positioning post, securing it in place. The upper part of the ceramic tube passes through a through-hole in the clamping block. Through the positioning of the clamping block and the top of the positioning post, the coaxiality and perpendicularity of the ceramic tube and disc are achieved. After positioning, the entire device is placed in the welding system. In a high-temperature environment, pre-applied welding material melts to achieve the final positioning of the joint between the ceramic tube and disc. The base platform, bottom fitting plate, positioning post, and clamping block are all made of high-temperature resistant materials and will not deform under high temperatures. Therefore, it effectively meets the positioning and welding requirements of the ceramic tube and disc, and the device is reusable, reducing costs. Attached Figure Description

[0019] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0020] Figure 1 This is a top view of the base platform of the ceramic structural component welding positioning device described in this utility model;

[0021] Figure 2 This is a cross-sectional view of the AA surface of the base platform of the ceramic structural component welding positioning device of this utility model.

[0022] Figure 3 This is a cross-sectional view of the bottom fitting plate of the ceramic structural component welding positioning device of the present invention.

[0023] Figure 4 This is a schematic diagram of the positioning column of the ceramic structural component welding positioning device of this utility model;

[0024] Figure 5 This is a cross-sectional view of the BB surface of the positioning column of the ceramic structural component welding positioning device of the present invention.

[0025] Figure 6 This is a schematic diagram of the clamping block of the ceramic structural component welding positioning device described in this utility model;

[0026] Figure 7 This is a cross-sectional view of the CC surface of the clamping block of the ceramic structural component welding positioning device of the present invention.

[0027] Figure 8 This is a schematic diagram of the ceramic structural component welding positioning device described in this utility model during use;

[0028] The following are labeled in the attached diagram: 1. Base platform; 2. Bottom fitting plate; 3. Positioning post; 4. Positioning groove; 5. Positioning protrusion; 6. Fitting plate through hole; 7. Positioning post positioning protrusion; 8. Clamping block; 9. Clamping block through hole; 10. Positioning step; 11. Ceramic tube; 12. Ceramic disc. Detailed Implementation

[0029] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0030] As attached Figure 1 - Appendix Figure 8As shown, this utility model is a welding positioning device for ceramic structural components, including a base platform 1, a bottom fitting plate 2, a positioning post 3, and a clamping block 8. The base platform 1 has a positioning groove 4 on its upper part, the bottom fitting plate 2 has a positioning protrusion 5 on its lower part, a fitting plate through hole 6 in the center of the bottom fitting plate 2, a positioning post positioning protrusion 7 on the lower part of the positioning post 3, and a clamping block through hole 9 in the middle of the clamping block 8. This structure addresses the shortcomings of existing technologies by proposing an improved technical solution. In this structure, the base platform 1, bottom fitting plate 2, positioning post 3, and clamping block 8 are fabricated separately. These components are combined to complete the positioning and welding of the ceramic disc 12 and the ceramic tube 11. The positioning groove 4 is located on the upper part of the base platform 1, and the ceramic disc 12 is placed within the positioning groove 4. Welding material is pre-applied to the ceramic disc 12, and the welding material is located at the welding point between the ceramic disc 12 and the ceramic tube 11. After the ceramic disc 12 is placed in position, the bottom fitting plate 2 is fastened to the upper surface of the base platform 1, and the positioning protrusion 5 is engaged with the inner wall of the positioning groove 4, thereby positioning the base platform 1 and the bottom fitting plate 2 and fixing the position of the ceramic disc 12. The positioning protrusion 7 at the lower part of the positioning post 3 can be engaged with the through hole 6 in the center of the bottom fitting plate 2, achieving coaxiality and perpendicularity positioning of the positioning post 3 and the bottom fitting plate 2. Then, the ceramic tube 11 is inserted from above the hollow positioning post 3, with the lower part of the ceramic tube 11 adhering to the ceramic disc 12. Then, the clamping block 8 is placed on the upper part of the positioning post, and the clamping block 8 is engaged with the upper part of the positioning post 3, while the upper part of the ceramic tube 11 passes through the through hole 9 of the clamping block. Through the positioning of the clamping block 8 and the upper part of the positioning post 3, the coaxiality and perpendicularity positioning of the ceramic tube 11 and the ceramic disc 12 are achieved. After positioning, the entire device is placed in a welding system (such as a laser brazing furnace or vacuum welding furnace). In a high-temperature environment (1700℃-1800℃ range), pre-applied welding material is melted to weld the ceramic tube and ceramic disc at their joint. The base platform 1, bottom fitting plate 2, positioning column 3, and clamping block 8 are all made of high-temperature resistant materials and will not deform due to high temperatures. Therefore, it effectively meets the positioning and welding requirements of ceramic tubes and ceramic discs, and the device is reusable, reducing costs. The ceramic structural component welding positioning device described in this utility model has a simple structure and can quickly and accurately achieve high-precision control of the coaxiality, perpendicularity, and welding gap between the aluminum nitride disc and aluminum nitride tube. It has high versatility, is thermally stress-friendly, and improves the stability, repeatability, and consistency of the ceramic component welding process.

[0031] The clamping block 8 has a positioning step 10 at its lower part. The positioning step 10 at the lower part of the clamping block 8 is designed to be engaged with the upper outer wall of the positioning post 3. This structure allows the positioning step to position the upper part of the clamping block and the positioning post, ensuring the center lines of the positioning post 3 and the clamping block 8 coincide, effectively guaranteeing their coaxial positioning. Furthermore, the coaxial positioning of the positioning post 3 and the clamping block 8 ensures that the axial center line of the ceramic tube 11 coincides with the axial center line of the clamping block 8, thus achieving coaxial positioning of the ceramic tube 11 and the clamping block 8, and ensuring the coaxiality and perpendicularity positioning of the ceramic tube 11 and the ceramic disc 12.

[0032] The positioning groove 4 is designed to hold the ceramic disc 12 to be welded. Both the positioning groove 4 and the ceramic disc 12 are cylindrical. In this structure, the positioning groove 4 holds the ceramic disc 12, with the bottom surface of the ceramic disc 12 fitting against the bottom of the positioning groove 4, ensuring that the ceramic disc 12 and the base platform 1 are parallel. The positioning groove 4 is annular.

[0033] The positioning post 3 is a hollow cylindrical structure, and its interior is designed to accommodate a ceramic tube 11, which is also a hollow cylindrical structure. In this structure, the inner diameter of the hollow structure of the positioning post is larger than the outer diameter of the ceramic tube, ensuring easy insertion of the ceramic tube.

[0034] The positioning protrusion 5 at the lower part of the bottom fitting plate 2 is configured to be able to engage with the inner wall of the positioning groove 4 on the upper part of the base platform 1. The positioning protrusion 7 of the positioning post 3 is configured to be able to engage with the inside of the fitting plate through hole 6 of the bottom fitting plate 2, and the lower surface of the positioning post 3 is configured to be able to be supported on the upper surface of the bottom fitting plate 2. With the above structure, after the positioning protrusion 5 at the lower part of the bottom fitting plate 2 is engaged with the inner wall of the positioning groove 4 on the upper part of the base platform 1, it ensures that the positioning post 3 and the base platform 1 are in a vertical state, and the ceramic tube 11 inside the positioning post 3 and the ceramic disk 12 on the base platform 1 are in a vertical state.

[0035] The upper end of the ceramic tube 11 is configured to pass through the through hole 9 in the middle of the clamping block 8. With this configuration, the upper end of the ceramic tube 11 passes through the through hole 9 in the middle of the clamping block 8, thus positioning the ceramic tube and ensuring the coaxiality of the ceramic tube 11 and the clamping block 8, as well as the coaxiality and perpendicularity of the ceramic tube 11 and the ceramic disc 12. A high-temperature resistant pressure head can be inserted into the through hole 9 to clamp the ceramic tube.

[0036] The base platform 1 is a structure made of ceramic composite material or high-temperature resistant material (specifically, boron nitride or graphite), the bottom fitting plate 2 is a structure made of ceramic composite material or high-temperature resistant material, the positioning post 3 is a structure made of ceramic composite material or high-temperature resistant material, and the clamping block 8 is a structure made of ceramic composite material or high-temperature resistant material. All of the above structures, including the base platform 1, bottom fitting plate 2, positioning post 3, and clamping block 8, are made of high-temperature resistant material, capable of withstanding the high temperatures during welding of ceramic discs and ceramic tubes in welding systems (such as laser brazing furnaces or vacuum welding furnaces) without deformation. Furthermore, they are reusable, eliminating the need for frequent device manufacturing and reducing production costs.

[0037] Both the aluminum nitride ceramic disc 12 and the aluminum nitride ceramic tube 11 are structures made of aluminum nitride ceramic. In this invention, the welding material used for welding the ceramic disc 12 and the ceramic tube 11 is aluminum nitride slurry. This material is not an improvement, but rather a material already existing in the prior art. The ceramic composite material or high-temperature resistant material of the base platform 1 is boron nitride or graphite.

[0038] To improve versatility, the ceramic structural component welding positioning device of this utility model features screw holes at 90° angles in four directions on the side of the base platform, each connecting to a positioning groove. This allows ceramic discs of different models and sizes to be placed in the positioning grooves, and by tightening the screws in each screw hole, they are pressed against the side of the ceramic disc, achieving reliable positioning. Specifically, the axial centerline of the ceramic disc coincides with the axial centerline of the base platform, ensuring the positioning accuracy of the ceramic disc and ceramic tube and improving the device's versatility. For ceramic tubes of different diameters, the clamping blocks 8 with different diameter through holes 9 can be replaced.

[0039] The ceramic structural component welding positioning device of this utility model is constructed by separately manufacturing a base platform 1, a bottom fitting plate 2, a positioning post 3, and a clamping block 8. These components are used together to position and weld the ceramic disc 12 and the ceramic tube 11. A positioning groove 4 is provided on the upper part of the base platform 1, where the ceramic disc 12 is placed. Welding material is pre-applied to the ceramic disc 12, located at the welding point between the ceramic disc 12 and the ceramic tube 11. After the ceramic disc 12 is in place, the bottom fitting plate 2 is fastened to the upper surface of the base platform 1, and the positioning protrusion 5 is engaged with the inner wall of the positioning groove 4, thus positioning the base platform 1 and the bottom fitting plate 2 and fixing the position of the ceramic disc 12. The positioning protrusion 7 at the lower part of the positioning post 3 can be engaged into the through hole 6 in the center of the bottom fitting plate 2, achieving coaxiality and perpendicularity positioning between the positioning post 3 and the bottom fitting plate 2. Then, the ceramic tube 11 is inserted from above the hollow positioning post 3, with the lower part of the ceramic tube 11 adhering to the ceramic disc 12. Next, the clamping block 8 is placed on top of the positioning post 3, securing it in place. The upper part of the ceramic tube 11 passes through the through hole 9 of the clamping block. Through the positioning by the clamping block 8 and the upper part of the positioning post 3, the coaxiality and perpendicularity of the ceramic tube 11 and the ceramic disc 12 are achieved. After positioning, the entire device is placed in a welding system (such as a laser brazing furnace or a vacuum welding furnace). In a high-temperature environment (1700℃-1800℃ range), pre-applied welding material is melted to weld the joint between the ceramic tube and the ceramic disc. The base platform 1, bottom fitting plate 2, positioning post 3, and clamping block 8 are all made of high-temperature resistant materials and will not deform due to high temperatures. Therefore, it effectively meets the positioning and welding requirements of the ceramic tube and ceramic disc, and the device is reusable, reducing costs.

[0040] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A ceramic structural member welding fixture, comprising: It includes a base platform (1), a bottom fitting plate (2), a positioning post (3), and a clamping block (8). The base platform (1) is provided with a positioning groove (4) on the upper part, the bottom fitting plate (2) is provided with a positioning protrusion (5) on the lower part, the bottom fitting plate (2) is provided with a fitting plate through hole (6) in the center, the positioning post (3) is provided with a positioning post positioning protrusion (7) on the lower part, and the clamping block (8) is provided with a clamping block through hole (9) in the middle.

2. The ceramic structural member welding fixture of claim 1, wherein: The clamping block (8) is provided with a positioning step (10) at the bottom.

3. The ceramic structural component welding positioning device according to claim 1 or 2, characterized in that: The positioning groove (4) is designed to hold the ceramic disc (12) to be welded. The positioning groove (4) is a cylindrical structure and the ceramic disc (12) is a cylindrical structure.

4. The ceramic structural component welding positioning device according to claim 3, characterized in that: The positioning post (3) is a hollow cylindrical structure, and the interior of the positioning post (3) is designed to accommodate the ceramic tube (11), which is a hollow cylindrical structure.

5. The ceramic structural component welding positioning device according to claim 1 or 2, characterized in that: The positioning protrusion (5) at the lower part of the bottom fitting plate (2) is configured to be able to be locked onto the inner wall of the positioning groove (4) at the upper part of the base platform (1).

6. The ceramic structural component welding positioning device according to claim 1 or 2, characterized in that: The positioning post (3) has a positioning post protrusion (7) that can be fitted into the through hole (6) of the bottom fitting plate (2), and the lower surface of the positioning post (3) is configured to be supported on the upper surface of the bottom fitting plate (2).

7. The ceramic structural component welding positioning device according to claim 1 or 2, characterized in that: The positioning step (10) at the lower part of the clamping block (8) is configured to be able to be locked onto the upper outer wall of the positioning post (3).

8. The ceramic structural component welding positioning device according to claim 4, characterized in that: The upper end of the ceramic tube (11) is configured to pass through the through hole (9) of the clamping block (8) in the middle.

9. The ceramic structural component welding positioning device according to claim 1 or 2, characterized in that: The base platform (1) is a structure made of ceramic composite material or high temperature resistant material, the bottom interlocking plate (2) is a structure made of ceramic composite material or high temperature resistant material, and the clamping block (8) is a structure made of ceramic composite material or high temperature resistant material.

10. The ceramic structural component welding positioning device according to claim 4, characterized in that: Both the ceramic disc (12) and the ceramic tube (11) are made of aluminum nitride ceramic.

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