Fixture for shaping iridium crucible
By using a fixture to hot spin-form and cool the iridium crucible, the problem of deformation of the iridium crucible at high temperatures was solved, the recycling of the iridium crucible was realized, production costs were reduced, and crystal quality was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-07
AI Technical Summary
In the existing technology, after repeated use at high temperatures, the surface of the iridium crucible undergoes severe volatilization and deformation, resulting in significant iridium loss and affecting crystal quality, thus increasing production costs.
A fixture is used to heat the iridium crucible by means of an electromagnetic induction coil, combined with a threaded rod and a hydraulic telescopic rod to drive the shaping block. The crucible is then rapidly cooled and shaped by cooling water.
It effectively restores the original shape of the iridium crucible, reduces resource waste, lowers production costs, and improves the reliability and quality of crystal growth.
Smart Images
Figure CN224087624U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of artificial crystal growth technology, and in particular to a fixture for shaping an iridium crucible. Background Technology
[0002] In the field of artificial crystal growth, the high-performance crystals grown typically possess high density and high melting point. For example, LYSO crystal has a melting point of approximately 2050℃ and a density of 7.16 g / cm³; LSO crystal has a melting point of approximately 2100℃ and a density of 7.41 g / cm³; and Nd:YAG crystal has a melting point of approximately 1970℃ and a density of 4.5 g / cm³. Since iridium has a melting point of approximately 2440℃ and a working temperature that can reach 2200℃, induction pulling furnaces are generally used when growing these high-density, high-melting-point high-temperature oxide crystals, with an iridium crucible serving as both the container and heater.
[0003] However, when growing crystals with melting points exceeding 2000℃, the iridium on the surface of the iridium crucible will volatilize after 10-15 repeated uses, and severe distortion and deformation will occur at the crucible mouth and bottom. This not only causes serious iridium loss but also affects crystal quality, hindering crystal industrialization. Moreover, when the deformation of the iridium crucible reaches a certain extent, crystal growth becomes difficult, and cracking occurs. Unusable iridium crucibles need to be remelted and reprocessed, further increasing crystal production costs. Therefore, how to restore deformed iridium crucibles to their original shape at high temperatures, avoiding the high cost and resource waste of remaking new crucibles, has become an urgent technical problem to be solved. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fixture for shaping iridium crucibles.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A fixture for shaping an iridium crucible includes a fixed base. A limiting ring is welded to the center of the top of the fixed base, and a cylindrical shell is placed on the inner wall of the limiting ring. A first inner pressure cover and a second inner pressure cover are placed on the inner wall of the cylindrical shell. A threaded hole is opened through one side of the outer wall of the middle portion of the cylindrical shell, and a threaded rod is screwed into the inner wall of the threaded hole. A top rod is welded to one side of the outer wall of the threaded rod. A gantry bracket is fixed to the middle of the fixed base by bolts, and sliding grooves are opened through both sides of the gantry bracket. A fixed top plate is slidably inserted into the inner wall of the sliding groove, and a hydraulic telescopic rod is connected to the top of the fixed top plate. A rotating shaft is rotatably installed at the center of the bottom of the fixed top plate, and a sealing cover is rotatably connected to the bottom of the rotating shaft. The bottom of the sealing cover is fixed to a shaping pressure block with a cavity in its inner wall, and an inlet pipe and a drain pipe are respectively connected to the outer walls on both sides of the top of the sealing cover.
[0007] As a further improvement of this utility model: the top of the cylindrical shell has an annular groove, and an electromagnetic induction coil is placed on the inner wall of the annular groove, the size of the inner wall of the annular groove being adapted to the size of the electromagnetic induction coil.
[0008] As a further improvement of this utility model: both ends of the outer wall of the first inner pressure cover are provided with equally spaced positioning holes, and both ends of the outer wall of the second inner pressure cover are provided with equally spaced positioning rods, the size of which is adapted to the size of the inner wall of the positioning hole.
[0009] As a further embodiment of this utility model: the inner wall of the cylindrical outer shell has a slot, and a locking block is welded to the outer wall of one side of the middle part of the first inner pressure cover, the size of the locking block being adapted to the size of the inner wall of the slot.
[0010] As a further embodiment of this utility model: a first gear is welded to the outer wall of the middle part of the rotating shaft, and a second gear is meshed on one side of the first gear, and a servo motor is connected to the bottom axis of the second gear.
[0011] As a further improvement of this utility model: the shaping block is located directly above the cylindrical shell, and the axial center of the cylindrical shell and the shaping block are on the same vertical line.
[0012] As a further improvement of this utility model: the liquid inlet pipe is externally connected to a cooling water pipe, and the cavity is filled with cold water.
[0013] Compared with the prior art, this utility model provides a fixture for shaping iridium crucibles, which has the following beneficial effects:
[0014] 1. The iridium crucible shaping fixture designed in this paper places the iridium crucible to be shaped inside two inner pressure shells. After using an electromagnetic induction coil to assist in heating and maintain the temperature of the iridium crucible, the threaded rod is used to press the two semi-circular inner pressure shells closer to each other, thereby performing preliminary shaping of the iridium crucible. The operation is simple.
[0015] 2. The fixture for shaping the iridium crucible in this design, in order to further improve the shaping effect and avoid deformation of the inner wall of the iridium crucible during the shaping process, uses a hydraulic telescopic rod to drive the shaping block to press down, and a servo motor to drive the shaping block to rotate, using the hot spinning shaping method for rapid shaping.
[0016] 3. The fixture for shaping the iridium crucible in this design, after shaping the iridium crucible, further improves the shape of the shaped iridium crucible by using continuously flowing cold water to cool the shaping block and using heat conduction to cool and shape the shaped iridium crucible.
[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a fixture for shaping an iridium crucible proposed in this utility model;
[0019] Figure 2 This is a side view of the overall structure of a fixture for shaping iridium crucibles proposed in this utility model;
[0020] Figure 3 This is a first-view structural schematic diagram of a fixture for shaping an iridium crucible proposed in this utility model;
[0021] Figure 4 This is a partial structural disassembly diagram of a fixture for shaping an iridium crucible proposed in this utility model.
[0022] In the diagram: 1. Fixed base; 2. Limiting collar; 3. Cylindrical outer shell; 4. Annular groove; 5. Electromagnetic induction coil; 6. First inner pressure cover; 7. Second inner pressure cover; 8. Positioning insertion hole; 9. Positioning insertion rod; 10. Slot; 11. Block; 12. Threaded hole; 13. Threaded rod; 14. Top rod; 15. Gantry bracket; 16. Sliding groove; 17. Fixed top plate; 18. Hydraulic telescopic rod; 19. Rotating shaft; 20. Sealing cover; 21. Cavity; 22. Shaping pressure block; 23. Liquid inlet pipe; 24. Liquid outlet pipe; 25. First gear; 26. Second gear; 27. Servo motor. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0024] Example 1:
[0025] A fixture for shaping iridium crucibles, as described in this embodiment... Figure 1-4As shown, the system includes a fixed base 1. A limiting collar 2 is welded to the top center of the fixed base 1, and a cylindrical outer shell 3 is placed on the inner wall of the limiting collar 2. A first inner pressure cover 6 and a second inner pressure cover 7 are placed on the inner wall of the cylindrical outer shell 3. A threaded hole 12 is opened through one side of the outer wall of the middle portion of the cylindrical outer shell 3, and a threaded rod 13 is screwed into the inner wall of the threaded hole 12. A top rod 14 is welded to one side of the outer wall of the threaded rod 13. A gantry bracket 15 is fixed to the middle portion of the fixed base 1 by bolts. Furthermore, sliding grooves 16 are opened through both sides of the gantry support 15. A fixed top plate 17 is slidably inserted into the inner wall of the sliding groove 16, and a hydraulic telescopic rod 18 is connected to the top of the fixed top plate 17. A rotating shaft 19 is rotatably installed at the center of the bottom of the fixed top plate 17, and a sealing cover 20 is rotatably connected to the bottom of the rotating shaft 19. The bottom of the sealing cover 20 is fixed on the shaping pressure block 22 with a cavity 21 in the inner wall, and the outer walls on both sides of the top of the sealing cover 20 are respectively connected to the liquid inlet pipe 23 and the liquid outlet pipe 24.
[0026] By placing the iridium crucible to be shaped inside two inner pressure shells, and using electromagnetic induction coil 5 to auxiliary heat the iridium crucible to maintain the temperature, the threaded rod 13 is used to press the two semi-circular inner pressure shells closer to each other, thereby performing preliminary shaping of the iridium crucible. The operation is simple.
[0027] The top of the cylindrical outer shell 3 has an annular groove 4, and an electromagnetic induction coil 5 is placed on the inner wall of the annular groove 4. The inner wall size of the annular groove 4 is adapted to the size of the electromagnetic induction coil 5. The outer walls of both ends of the first inner pressure cover 6 have equally spaced positioning holes 8, and the outer walls of both ends of the second inner pressure cover 7 are welded with equally spaced positioning rods 9. The size of the positioning rods 9 is adapted to the inner wall size of the positioning holes 8.
[0028] The inner wall of the cylindrical outer shell 3 has a slot 10, and a locking block 11 is welded to the outer wall of one side of the middle part of the first inner pressure cover 6. The size of the locking block 11 is adapted to the size of the inner wall of the slot 10.
[0029] A first gear 25 is welded to the outer wall of the middle part of the rotating shaft 19, and a second gear 26 meshes with one side of the first gear 25. A servo motor 27 is connected to the bottom axis of the second gear 26.
[0030] In the process of shaping the iridium crucible, in order to further improve the shaping effect and avoid deformation of the inner wall of the iridium crucible, the hydraulic telescopic rod 18 is used to drive the shaping block 22 to press down, and the servo motor 27 drives the shaping block 22 to rotate, so as to quickly shape it by using the hot spinning shaping method.
[0031] In this embodiment, the shaping fixture is first assembled. After assembly, it is connected to an external power source. After a normal power supply test, the iridium crucible to be shaped is placed in a high-temperature furnace, heated to 1300°C, and held for 2 hours. Then, it is placed between the first inner pressure housing 6 and the second inner pressure housing 7. After this, the top rod 14 is adjusted to rotate the threaded rod 13, pressing the second inner pressure housing 7, thereby performing a pressing and shaping process on the iridium crucible. When the first inner pressure housing 6 and the second inner pressure housing 7 are brought close together to form a circle, the initial shaping of the iridium crucible is completed. Furthermore, during the shaping process... To prevent the temperature of the iridium crucible from dropping and resulting in poor subsequent shaping, electromagnetic induction coils 5 are used for auxiliary heating to maintain the temperature. Then, hydraulic telescopic rods 18 are used to lower the shaping block 22, thereby squeezing the inner wall of the iridium crucible. Meanwhile, servo motor 27 is started to drive the shaping block 22 to rotate slowly, thus performing hot-spinning shaping on the inner wall of the iridium crucible. This dual shaping process can effectively improve the shaping effect. After shaping, to ensure smooth subsequent processes, cold water is injected into the liquid inlet pipe 23 to cool the shaping block 22, thereby accelerating the cooling of the iridium crucible and improving the forming effect.
[0032] Example 2:
[0033] A fixture for shaping iridium crucibles, such as Figure 1-4 As shown, this embodiment makes the following additions based on embodiment 1: the shaping block 22 is located directly above the cylindrical shell 3, and the axial center of the cylindrical shell 3 and the shaping block 22 are located on the same vertical line; the liquid inlet pipe 23 is externally connected to a cooling water pipe, and the cavity 21 is filled with cold water.
[0034] In this embodiment, after the iridium crucible is shaped, in order to further improve the shape of the shaped iridium crucible, the shaping block 22 is cooled by continuously flowing cold water, and the shaped iridium crucible is cooled and formed by heat conduction.
[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A fixture for shaping an iridium crucible, comprising a fixed base (1), characterized in that, A limiting collar (2) is welded to the top center of the fixed base (1), and a cylindrical shell (3) is placed on the inner wall of the limiting collar (2). A first inner pressure cover (6) and a second inner pressure cover (7) are placed on the inner wall of the cylindrical shell (3). A threaded hole (12) is opened through one side of the outer wall of the middle part of the cylindrical shell (3), and a threaded rod (13) is screwed into the inner wall of the threaded hole (12). A top rod (14) is welded to one side of the outer wall of the threaded rod (13). A gantry bracket (15) is fixed to the middle part of the fixed base (1) by bolts, and the gantry bracket (15) is fixed to the middle part of the fixed base (1). 5) Both sides are through sliding grooves (16), and a fixed top plate (17) is slidably inserted into the inner wall of the sliding groove (16). A hydraulic telescopic rod (18) is connected to the top of the fixed top plate (17). A rotating shaft (19) is rotatably installed at the center of the bottom of the fixed top plate (17). A sealing cover (20) is rotatably connected to the bottom of the rotating shaft (19). The bottom of the sealing cover (20) is fixed on the shaping pressure block (22) with a cavity (21) in the inner wall. The outer walls on both sides of the top of the sealing cover (20) are respectively connected to the liquid inlet pipe (23) and the liquid outlet pipe (24).
2. The fixture for shaping an iridium crucible according to claim 1, characterized in that, The top of the cylindrical shell (3) has an annular groove (4), and an electromagnetic induction coil (5) is placed on the inner wall of the annular groove (4). The inner wall size of the annular groove (4) is adapted to the size of the electromagnetic induction coil (5).
3. A fixture for shaping an iridium crucible according to claim 1, characterized in that, The first inner pressure cover (6) has equidistantly distributed positioning holes (8) on both outer walls, and the second inner pressure cover (7) has equidistantly distributed positioning rods (9) welded on both outer walls. The size of the positioning rods (9) is adapted to the size of the inner wall of the positioning holes (8).
4. A fixture for shaping an iridium crucible according to claim 1, characterized in that, The inner wall of the cylindrical outer shell (3) has a slot (10), and a locking block (11) is welded to the outer wall of one side of the middle part of the first inner pressure cover (6). The size of the locking block (11) is adapted to the size of the inner wall of the slot (10).
5. A fixture for shaping an iridium crucible according to claim 1, characterized in that, A first gear (25) is welded to the outer wall of the middle part of the rotating shaft (19), and a second gear (26) meshes with one side of the first gear (25). A servo motor (27) is connected to the bottom axis of the second gear (26).
6. A fixture for shaping an iridium crucible according to claim 1, characterized in that, The shaping block (22) is located directly above the cylindrical shell (3), and the axial center of the cylindrical shell (3) and the shaping block (22) are on the same vertical line.
7. A fixture for shaping an iridium crucible according to claim 1, characterized in that, The liquid inlet pipe (23) is externally connected to a cooling water pipe, and the cavity (21) is filled with cold water.