Molybdenum seed crystal rod capable of freely adjusting concentricity by 360 degrees

Abstract

The utility model discloses a molybdenum seed crystal rod capable of freely adjusting concentricity by 360 degrees. The molybdenum seed crystal rod at least comprises a molybdenum rod, a stainless steel optical shaft and a seed crystal, the stainless steel optical shaft is fixed with the outside, a first through groove matched with the stainless steel optical shaft is formed in the top of the molybdenum rod, a second through groove connected with a seed crystal is formed in the bottom of the molybdenum rod, and an adjusting part is arranged on the contact part of the stainless steel optical shaft and the molybdenum rod; the adjusting part is inserted into the contact part of the stainless steel optical axis and the molybdenum rod to change the coaxiality of the center of the molybdenum rod and the center of the stainless steel optical axis; according to the scheme, the stainless steel optical shaft is connected with the molybdenum rod through the pin rod, the conical groove is formed in the upper end of the molybdenum rod, a certain gap is formed between the molybdenum rod and the optical shaft, the split type conical clamping ring is clamped at the upper end of the molybdenum rod and provided with scales, and the seed crystal is installed at the tail end of the molybdenum rod. The concentricity of the seed crystal at the tail end is adjusted by adjusting the depth of the single split type conical clamping ring, so that the deviation is smaller than 1mm.

Description

Technical Field

[0001] The utility model relates to the technical field of seed crystal connection in YAG crystal growth by a Czochralski method, in particular to a molybdenum seed crystal rod with 360-degree free adjustment of concentricity. Background Art

[0002] Adjusting and centering the seed crystal is one of the most critical steps in the YAG crystal growth process. Existing seed crystal connection structures use a stainless steel or ceramic pull rod threadedly connected to a molybdenum seed crystal rod. A square groove at the end of the molybdenum seed crystal rod holds the seed crystal. This method makes concentricity adjustment difficult and has a limited adjustment range. Utility Model Content

[0003] The purpose of the present invention is to provide a molybdenum seed crystal rod with 360° freely adjustable concentricity to address the above-mentioned shortcomings, thereby solving the problems of great difficulty in adjusting the concentricity of the molybdenum seed crystal rod and small adjustable range in the prior art.

[0004] The utility model is realized by the following scheme:

[0005] A molybdenum seed crystal rod with 360° freely adjustable concentricity comprises at least a molybdenum rod, a stainless steel optical axis and a seed crystal; the stainless steel optical axis is fixed to the outside world, the top of the molybdenum rod is provided with a first through groove that cooperates with the stainless steel optical axis, the bottom of the molybdenum rod is provided with a second through groove connected to the seed crystal, and an adjustment portion is provided on the contact portion between the stainless steel optical axis and the molybdenum rod; the coaxiality of the center of the molybdenum rod and the center of the stainless steel optical axis is changed by inserting the adjustment portion into the contact portion between the stainless steel optical axis and the molybdenum rod.

[0006] Based on the above-mentioned structure of the molybdenum seed rod with 360° freely adjustable concentricity, the adjustment part adopts a split structure, and the adjustment part is a plurality of adjustment blocks, each of which includes a first end and a second end. The size of the adjustment block gradually increases from the first end to the second end.

[0007] Based on the above structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, the adjustment block is an arc-shaped structure, and the curvature of the adjustment block matches the opening curvature of the contact portion between the molybdenum rod and the stainless steel optical axis.

[0008] Based on the above-mentioned structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, the contact portion between the molybdenum rod and the stainless steel optical axis is provided with an adjustment reaming hole and a connecting through hole, the adjustment reaming hole and the connecting through hole are connected, and the adjustment reaming hole and the connecting through hole, the adjustment reaming hole as a whole form a diverging structure.

[0009] Based on the above structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, the diameter of the connecting through hole matches the diameter of the stainless steel optical axis, so that the stainless steel can be inserted into the connecting through hole.

[0010] Based on the above-mentioned structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, a first connecting hole is provided on the molybdenum rod, the first connecting hole passes through the molybdenum rod horizontally and is perpendicular to the connecting through hole, and a second connecting hole is provided on the stainless steel optical axis. The stainless steel optical axis and the molybdenum rod are connected by passing the electric furnace wire pin rod through the second connecting hole of the stainless steel optical axis and the first connecting hole of the molybdenum rod.

[0011] Based on the above structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, a scale bar is provided on the end surface of the adjustment block away from the stainless steel optical axis.

[0012] Based on the above structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, the scale bar is arranged at the center position of the adjustment block.

[0013] Based on the above structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, the second through groove is a rectangular structure, and the seed crystal is fixed to the end of the molybdenum rod through a key block molybdenum wire.

[0014] Based on the above structure of the molybdenum seed crystal rod with 360° freely adjustable concentricity, the adjustment block is a fan-shaped structure, specifically there are 8 adjustment blocks, and the central angle of each adjustment block is 45°.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. This solution uses a stainless steel optical axis and a molybdenum rod connected by a pin. The upper end of the molybdenum rod has a conical groove, and there is a certain gap between the molybdenum rod and the optical axis. A split conical retaining ring with a scale is clamped on the upper end of the molybdenum rod. The seed crystal is installed at the end of the molybdenum rod. The concentricity of the seed crystal at the end is adjusted by adjusting the depth of the single split conical retaining ring to keep the deviation less than 1mm.

[0017] 2. This solution uses the adjustment part to insert the adjustment part at different depths according to the deflection angle, which can make the entire adjustment process more accurate and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the utility model from above;

[0020] Figure 3 This is a structural diagram of the adjustment block in the present utility model;

[0021] Description of the drawings: 1. Molybdenum rod; 2. Stainless steel optical axis; 3. Seed crystal; 4. First through slot; 5. Second through slot; 6. Adjustment part; 7. First end; 8. Second end; 9. Adjustment expansion hole; 10. Connecting through hole; 11. First connecting hole; 12. Second connecting hole; 13. Scale bar; 14. Electric furnace wire pin rod. DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, the utility model provides a technical solution:

[0028] A molybdenum seed crystal rod with 360° freely adjustable concentricity, which at least includes but is not limited to a molybdenum rod 1, a stainless steel optical axis 2 and a seed crystal 3; the stainless steel optical axis 2 is fixed to the outside world, the top of the molybdenum rod 1 is provided with a first through groove 4 that cooperates with the stainless steel optical axis 2, the bottom of the molybdenum rod 1 is provided with a second through groove 5 connected to the seed crystal 3, and an adjustment portion 6 can be provided on the contact portion between the stainless steel optical axis 2 and the molybdenum rod 1; by inserting the adjustment portion 6 into the contact portion between the stainless steel optical axis 2 and the molybdenum rod 1, the coaxiality of the center of the molybdenum rod 1 and the center of the stainless steel optical axis 2 can be changed.

[0029] Based on the above structure, in this solution, the stainless steel optical axis 2 is fixed to the external growth structure. After being fixed, the stainless steel optical axis 2 is usually in a vertical state. However, due to the various connection methods and connection states between the stainless steel optical axis 2 and the molybdenum rod 1, the molybdenum rod 1 is often not coaxial with the center of the stainless steel optical axis 2. At this time, the traditional practice is to directly adjust the verticality of the seed crystal 3 at the bottom of the molybdenum rod 1. However, when the seed crystal 3 is directly adjusted, on the one hand, it may contaminate or damage the seed crystal 3. On the other hand, the adjusted verticality cannot be determined quickly and accurately, and is usually adjusted repeatedly by the operator based on experience.

[0030] However, poor verticality of the seed crystal 3 will bring uncontrollable factors to the crystal production process and affect the final crystallization. This solution uses the adjustment part 6 to insert the adjustment part 6 at different depths according to the deflection angle, which can make the entire adjustment process more accurate and efficient.

[0031] As an example, the adjustment part 6 can adopt a split structure, and the adjustment part 6 can be multiple adjustment blocks. The adjustment block can include a first end 7 and a second end 8. The size of the adjustment block gradually increases from the first end 7 to the second end 8.

[0032] Based on the above structure, the adjustment block is set to a structure with one end larger and the other end smaller. On the one hand, it is convenient to insert the smaller end face into the gap between the stainless steel optical axis 2 and the molybdenum rod 1. On the other hand, it is convenient to knock on the larger end face. The larger end has a relatively large surface area, which can increase the knocking area, facilitate operation, and also facilitate subsequent removal operations.

[0033] As an example, the adjustment block may be an arc-shaped structure, and the curvature of the adjustment block matches the curvature of the opening of the contact portion between the molybdenum rod 1 and the stainless steel optical axis 2 .

[0034] Based on the above structure, by setting the adjustment block as an arc-shaped structure, the adjustment block can be more smoothly inserted into the gap between the stainless steel optical axis 2 and the molybdenum rod 1 to achieve the adjustment function.

[0035] As an example, the contact portion between the molybdenum rod 1 and the stainless steel optical axis 2 can be provided with an adjusting reaming hole 9 and a connecting through hole 10, and the adjusting reaming hole 9 and the connecting through hole 10 are connected, and the adjusting reaming hole 9 and the connecting through hole 10, the adjusting reaming hole 9 as a whole is a diverging structure, that is, from the end of the molybdenum rod 1 to the connection with the connecting through hole 10, the radius of the adjusting reaming hole 9 is gradually reduced.

[0036] Based on the above structure, the adjustment hole 9 is set to a diverging structure, which can facilitate the insertion of the adjustment block.

[0037] As an example, the diameter of the connecting through hole 10 matches the diameter of the stainless steel optical shaft 2 , so that the stainless steel can be inserted into the connecting through hole 10 .

[0038] As an example, a first connecting hole 11 is provided on the molybdenum rod 1, the first connecting hole 11 passes through the molybdenum rod 1 horizontally and is perpendicular to the connecting through hole 10, a second connecting hole 12 is provided on the stainless steel optical axis 2, and the electric furnace wire pin rod 14 passes through the second connecting hole 12 of the stainless steel optical axis 2 and the first connecting hole 11 of the molybdenum rod 1 to connect the stainless steel optical axis 2 and the molybdenum rod 1.

[0039] Based on the above structure, the stainless steel optical axis 2 and the molybdenum rod 1 can be quickly disassembled and assembled through the latch structure, thereby improving the assembly efficiency.

[0040] As an example, a scale bar 13 may be provided on the end surface of the adjustment block away from the stainless steel optical axis 2 , and the scale bar 13 is provided at the center of the adjustment block.

[0041] Based on the above structure, by setting a scale bar 13 on the back of the adjustment block, the depth of the adjustment block entering the adjustment hole 9 can be accurately seen, and the adjustment block can be accurately adjusted by tapping within the scale size range according to the deflection angle.

[0042] As an example, the second through groove 5 is a rectangular structure, and the seed crystal 3 is fixed to the end of the molybdenum rod 1 through a key block molybdenum wire.

[0043] As an example, the adjustment block may be a fan-shaped structure, and specifically there may be 8 adjustment blocks, and the central angle of each adjustment block may be 45°.

[0044] Based on the above structure, by inserting 8 adjustment blocks into the adjustment reaming hole 9, the concentricity of the stainless steel optical axis 2 and the molybdenum rod 1 can be freely adjusted 360°, which reduces the difficulty of adjusting the concentricity of the seed crystal 3 and makes it more efficient and capable of adjusting the concentricity of the seed crystal 3 over a large range.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A molybdenum seed crystal rod with 360° freely adjustable concentricity, characterized in that: It at least includes a molybdenum rod, a stainless steel optical axis and a seed crystal; the stainless steel optical axis is fixed to the outside world, the top of the molybdenum rod is provided with a first through groove that cooperates with the stainless steel optical axis, the bottom of the molybdenum rod is provided with a second through groove connected to the seed crystal, and an adjustment part is provided on the contact part between the stainless steel optical axis and the molybdenum rod; the coaxiality of the center of the molybdenum rod and the center of the stainless steel optical axis is changed by inserting the adjustment part into the contact part between the stainless steel optical axis and the molybdenum rod.

2. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 1, characterized in that: The adjusting portion adopts a split structure, and the adjusting portion is composed of a plurality of adjusting blocks. The adjusting blocks include a first end and a second end. The size of the adjusting blocks gradually increases from the first end to the second end.

3. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 2, characterized in that: The adjustment block is an arc-shaped structure, and the curvature of the adjustment block matches the opening curvature of the contact portion between the molybdenum rod and the stainless steel optical axis.

4. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 3, characterized in that: The contact portion between the molybdenum rod and the stainless steel optical axis is provided with an adjusting reaming hole and a connecting through hole, the adjusting reaming hole and the connecting through hole are connected, and the adjusting reaming hole and the connecting through hole, the adjusting reaming hole as a whole form a diverging structure.

5. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 4, characterized in that: The diameter of the connecting through hole matches the diameter of the stainless steel optical axis, so that the stainless steel can be inserted into the connecting through hole.

6. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 5, characterized in that: A first connecting hole is provided on the molybdenum rod, which passes through the molybdenum rod horizontally and is perpendicular to the connecting through hole. A second connecting hole is provided on the stainless steel optical axis, and the stainless steel optical axis and the molybdenum rod are connected by passing the electric furnace wire pin rod through the second connecting hole of the stainless steel optical axis and the first connecting hole of the molybdenum rod.

7. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 6, characterized in that: A scale bar is provided on the end surface of the adjustment block away from the stainless steel optical axis.

8. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 7, characterized in that: The scale bar is arranged at the center of the adjustment block.

9. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 8, characterized in that: The second through groove is a rectangular structure, and the seed crystal is fixed to the end of the molybdenum rod through a key block molybdenum wire.

10. The molybdenum seed crystal rod with 360° freely adjustable concentricity according to claim 9, characterized in that: The adjustment block is a fan-shaped structure, and there are specifically 8 adjustment blocks, and the central angle of each adjustment block is 45°.

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