CN219861046U - Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface - Google Patents
Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface Download PDFInfo
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- CN219861046U CN219861046U CN202321158294.1U CN202321158294U CN219861046U CN 219861046 U CN219861046 U CN 219861046U CN 202321158294 U CN202321158294 U CN 202321158294U CN 219861046 U CN219861046 U CN 219861046U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The utility model discloses a die capable of directly die-pressing an infrared chalcogenide glass aspheric lens diffraction surface, which comprises an upper die and a lower die; the upper die is provided with an upper groove, the lower die is provided with a lower groove matched with the upper groove, materials used by the upper die and the lower die are nickel alloy, the inner surface of the upper groove is plated with a first metal transition layer, the inner surface of the lower groove is plated with a second metal transition layer, at least one surface of the first metal transition layer and the second metal transition layer is a diffraction surface, and materials used by the first metal transition layer and the second metal transition layer are nickel. The mold can be used for directly molding the diffraction surface of the infrared chalcogenide glass aspherical lens, and the direct compression molding of the diffraction surface of the infrared chalcogenide glass aspherical lens is realized, so that the manufacturing cost of the chalcogenide glass lens with the diffraction surface is reduced, and the qualification rate and the production efficiency are improved; and the die has good structural stability and long service life.
Description
Technical Field
The utility model relates to a die capable of directly die-pressing an infrared chalcogenide glass aspheric lens diffraction surface, and belongs to the technical field of lens diffraction surface processing.
Background
In general, the die casting mold of the chalcogenide glass lens is made of tungsten steel, and then the surface of the die casting mold is directly plated with a diamond-like carbon film to increase the surface hardness of the mold and further prolong the service life of the mold, but the tungsten steel is too high in hardness and can only be ground by adopting a grinding machine, and the micrometer thick and thin diffraction ring cannot be directly machined on the mold due to the size limitation of the grinding head. But the material with low hardness cannot adapt to the pressure and high temperature during mould pressing and is easy to deform. Therefore, in the current industry, the production of the infrared chalcogenide glass aspheric lens diffraction surface, the chalcogenide glass lens after being molded, needs to be turned into a diffraction ring by a diamond precise single-point lathe, and cannot be directly molded. The chalcogenide glass lens with the diffraction surface has high cost, low qualification rate and low production efficiency.
Disclosure of Invention
The utility model provides a die capable of directly die-pressing the diffraction surface of an infrared chalcogenide glass aspherical lens, which realizes the direct die-pressing forming of the diffraction surface of the infrared chalcogenide glass aspherical lens, reduces the manufacturing cost of the chalcogenide glass lens with the diffraction surface, and improves the qualification rate and the production efficiency.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a die capable of directly die-pressing an infrared chalcogenide glass aspheric lens diffraction surface comprises an upper die and a lower die; the upper die is provided with an upper groove, the lower die is provided with a lower groove matched with the upper groove, the materials of the upper die and the lower die are nickel alloy, the inner surface of the upper groove is plated with a first metal transition layer, the inner surface of the lower groove is plated with a second metal transition layer, at least one surface of the first metal transition layer and the second metal transition layer is a diffraction surface, and the materials of the first metal transition layer and the second metal transition layer are nickel.
The upper die and the lower die are made of nickel alloy, have lower hardness than tungsten steel, are harder than common steel, and meet the use requirements. The diamond-like carbon coating adopted on the surface of the traditional tungsten steel die cannot be firmly attached to the die after the die is heated, so that the service life of the coating of the die is only a few times. According to the utility model, after the nickel transition layer is adopted, the diffraction ring is processed on the transition layer, so that the processing difficulty is reduced, the expansion coefficients of the nickel plating layer and the nickel alloy are close, the adhesion is still firm enough after heating, and the service life of the die is remarkably prolonged.
When the die adopts a diamond single-point lathe for turning, the laser heating is matched for assistance, a micron-thick diffraction ring can be directly machined on the die, the die is suitable for pressure and high temperature during die pressing, the die is not easy to deform, the direct die pressing forming of an infrared chalcogenide glass aspheric lens diffraction surface is realized, the structure is simple, the use is convenient, the cost is low, and the production efficiency and the qualification rate are improved.
The upper groove and the lower groove are matched with each other, the positions of the upper groove and the lower groove are opposite up and down, a target lens can be pressed, the surfaces of the first metal transition layer and the second metal transition layer are respectively the same as the two surface types of the target lens, and at least one surface of the first metal transition layer and the second metal transition layer is a diffraction surface because at least one surface of the target lens is a diffraction surface.
The die provided by the utility model adopts nickel alloy as a base material, has low hardness compared with tungsten steel, has much higher hardness compared with other materials, and can be turned by a diamond single-point lathe directly.
When the infrared chalcogenide glass aspheric lens diffraction surface is prepared, the raw materials are placed between an upper die and a lower die, and the infrared chalcogenide glass aspheric lens with the diffraction surface can be obtained through direct compression molding. Heating and the like during compression molding are common knowledge, and the utility model is not repeated.
In order to increase the hardness of the surface of the die and the service life of the die, a first noble metal layer is plated on the surface of the first metal transition layer, a second noble metal layer is plated on the surface of the second metal transition layer, the noble metal layer is nano-scale and extremely thin, the surface shape of the transition layer is not affected, and the noble metal layer corresponding to the diffraction surface is also a diffraction surface. This can increase the aspherical surface hardness of the mold. Meanwhile, due to the arrangement of the metal transition layer, the binding force between the nickel alloy substrate and the noble metal layer is increased.
In order to further improve the hardness of the film, the first noble metal layer and the second noble metal layer are made of rare noble metals. The rare noble metal is at least one of gold, silver or a platinum group metal.
In order to achieve the aim of cost and service life, the thickness of the first noble metal layer and the second noble metal layer is 200+/-20 nm.
In order to improve the binding force with the nickel alloy base material, the difference value between the thermal expansion coefficients of the materials used for the first metal transition layer and the second metal transition layer and the thermal expansion coefficients of the nickel alloy used for the upper die and the lower die is < +/-2.
In order to achieve the aim of cost and service life, the upper die and the lower die are preferably made of inconel 718 nickel alloy. Further preferably, the thickness of the first metal transition layer and the second metal transition layer is 0.05.+ -. 0.01mm.
The preparation method of the mold capable of directly molding the infrared chalcogenide glass aspheric lens diffraction surface comprises the following steps: turning out the surface type rough blank required by the chalcogenide glass aspheric lens on the upper die and the lower die nickel alloy base material by using a diamond single-point lathe; then plating a metal transition layer on the rough blank, wherein the thermal expansion coefficient of the metal transition layer is similar to that of the nickel alloy, so that the metal transition layer cannot fall off when the die is heated to high temperature; and turning the final aspheric surface type and diffraction ring on the metal transition layer. In order to prolong the service life of the die, a noble metal layer with higher hardness is plated on the metal transition layer, and the die is finished after polishing.
The technology not mentioned in the present utility model refers to the prior art.
The mold for directly molding the diffraction surface of the infrared chalcogenide glass aspherical lens can directly mold the infrared chalcogenide glass aspherical lens with the diffraction surface on a glass lens precision molding press, can adapt to pressure and high temperature during mold molding, is not easy to deform, realizes direct mold molding of the diffraction surface of the infrared chalcogenide glass aspherical lens, has a simple structure, is convenient to use, has low cost, and improves the production efficiency and the qualification rate; the nickel alloy of the die base material is softer than tungsten steel, and after being plated with a metal transition layer with similar thermal expansion coefficient, the die base material can directly process a diffraction ring on an aspheric surface; further, after a noble metal layer with higher hardness is plated, the surface hardness of the aspherical surface of the die is close to the hardness of a tungsten steel die, so that the service life of the die can be ensured, and the die is not deformed or layered after multiple die pressing; the metal transition layer allows the nickel alloy substrate and the noble metal layer to be more tightly combined, and neutralizes the difference in thermal expansion coefficients of the nickel alloy substrate and the noble metal layer.
Drawings
FIG. 1 is a schematic diagram of a mold capable of directly molding an aspherical lens diffraction surface of an infrared chalcogenide glass according to the present utility model;
FIG. 2 is a schematic diagram of a molding state;
in the figure, 1 is an upper die, 11 is an upper groove, 12 is a first metal transition layer, 13 is a first noble metal layer, 2 is a lower die, 21 is a lower groove, 22 is a second metal transition layer, 23 is a second noble metal layer, 3 is a limiting cylinder, and 4 is a raw material.
Detailed Description
For a better understanding of the present utility model, the following examples are further illustrated, but are not limited to the following examples.
The terms of the directions of up, down, left, right, horizontal, vertical and the like of the present utility model are based on the relative directions or positional relationships shown in the drawings, and should not be construed as absolute limitations of the present utility model.
Example 1
As shown in FIG. 1, a mold capable of directly molding the diffraction surface of an infrared chalcogenide glass aspherical lens comprises an upper mold and a lower mold; the upper die is provided with an upper groove, the lower die is provided with a lower groove matched with the upper groove, materials used for the upper die and the lower die are inconel 718 nickel alloy, the inner surface of the upper groove is plated with a first metal transition layer, the inner surface of the lower groove is plated with a second metal transition layer, and at least one surface of the first metal transition layer and the second metal transition layer is a diffraction surface. The first metal transition layer and the second metal transition layer are made of nickel; the thickness of the first metal transition layer and the second metal transition layer are both 0.05mm. In fig. 1, the broken lines omit the heights of the mold and the lower mold.
The preparation method of the mold capable of directly molding the infrared chalcogenide glass aspheric lens diffraction surface comprises the following steps: turning out the surface type rough blank required by the chalcogenide glass aspheric lens on the upper die and the lower die nickel alloy base material by using a diamond single-point lathe; then plating a metal transition layer (a first metal transition layer and a second metal transition layer) on the rough blank, wherein the metal transition layer has a thermal expansion coefficient similar to that of the nickel alloy, so that the metal transition layer cannot fall off when the die is heated to a high temperature; and when turning is performed on the metal transition layer by adopting a diamond single-point lathe, processing a final aspheric surface type diffraction ring with micron thickness by matching with the assistance of laser heating, and finally finishing the die after polishing.
When the infrared chalcogenide glass aspheric lens diffraction surface is prepared, as shown in fig. 2, raw materials are placed between an upper die and a lower die, and direct compression molding is performed, so that the infrared chalcogenide glass aspheric lens with the diffraction surface is obtained, the die can adapt to pressure and high temperature during compression molding, is not deformed, the direct compression molding of the infrared chalcogenide glass aspheric lens diffraction surface is realized, the structure is simple, the use is convenient, the cost is low, and the production efficiency and the qualification rate are improved. The mold is suitable for pressure and high temperature during mold pressing, after the mold is repeatedly used for 60 times, the first metal transition layer and the second metal transition layer are still tightly combined with the upper groove and the lower groove, layering phenomenon is avoided, the mold is free from deformation, the continuous use requirement is met, and the manufactured lens meets the use requirement, and the qualification rate is 100%.
Example 2
As shown in FIG. 1, a mold capable of directly molding the diffraction surface of an infrared chalcogenide glass aspherical lens comprises an upper mold and a lower mold; the upper die is provided with an upper groove, the lower die is provided with a lower groove matched with the upper groove, the upper die and the lower die are made of inconel 718 nickel alloy, the inner surface of the upper groove is plated with a first metal transition layer, the inner surface of the lower groove is plated with a second metal transition layer, and the materials of the first metal transition layer and the second metal transition layer are nickel; the thicknesses of the first metal transition layer and the second metal transition layer are 0.05mm, and at least one surface of the first metal transition layer and the second metal transition layer is a diffraction surface. In order to further prolong the service life of the die, the surface of the first metal transition layer is plated with a first noble metal layer, and the surface of the second metal transition layer is plated with a second noble metal layer, so that the aspheric surface hardness of the die can be improved. The first noble metal layer and the second noble metal layer are made of platinum; the thickness of the first noble metal layer and the second noble metal layer are both 200nm.
The preparation method of the mold capable of directly molding the infrared chalcogenide glass aspheric lens diffraction surface comprises the following steps: turning out the surface type rough blank required by the chalcogenide glass aspheric lens on the upper die and the lower die nickel alloy base material by using a diamond single-point lathe; then plating a metal transition layer (a first metal transition layer and a second metal transition layer) on the rough blank, wherein the metal transition layer has a thermal expansion coefficient similar to that of the nickel alloy, so that the metal transition layer cannot fall off when the die is heated to a high temperature; and when turning by adopting a diamond single-point lathe on the metal transition layer, processing a final aspheric surface type and micron thick and thin diffraction ring by matching with laser heating assistance, plating a noble metal layer (a first noble metal layer and a second noble metal layer) with higher hardness on the metal transition layer, and finally finishing the die after polishing. The mold is suitable for pressure and high temperature during mold pressing, after the mold is repeatedly used for 100 times, all layers are still tightly combined, layering phenomenon is avoided, the mold is free from deformation problem, the continuous use requirement is met, and the manufactured lens meets the use requirement, and the qualification rate is 100%.
The above examples can be used for directly molding the infrared chalcogenide glass aspheric lens diffraction surface mold, and the infrared chalcogenide glass aspheric lens with the diffraction surface can be directly molded on a glass lens precision molding press; the nickel alloy of the mould base material is softer than tungsten steel, and after being plated with a metal transition layer with similar thermal expansion coefficient, the diffraction ring on the aspheric surface can be directly processed. Further, after a noble metal layer with higher hardness is plated, the surface hardness of the aspherical surface of the die is close to the hardness of a tungsten steel die, so that the service life of the die can be ensured, and the die is not deformed after multiple die pressing; the metal transition layer enables the nickel alloy substrate and the noble metal layer to be tightly combined, the difference of thermal expansion coefficients of the nickel alloy substrate and the noble metal layer is neutralized, and the mold life is verified to be unchanged from the tungsten steel mold life, so that the structure stability is good, the service life is long, the preparation cost of the infrared chalcogenide glass aspheric lens diffraction surface is reduced, and the qualification rate and the production efficiency are improved.
Claims (7)
1. A die capable of directly die-pressing an infrared chalcogenide glass aspheric lens diffraction surface comprises an upper die (1) and a lower die (2); the upper die (1) is provided with an upper groove (11), and the lower die (2) is provided with a lower groove (21) matched with the upper groove (11), and is characterized in that: the materials used by the upper die (1) and the lower die (2) are nickel alloy, the inner surface of the upper groove (11) is plated with a first metal transition layer (12), the inner surface of the lower groove (21) is plated with a second metal transition layer (22), at least one surface of the first metal transition layer (12) and the second metal transition layer (22) is a diffraction surface, and the materials used by the first metal transition layer (12) and the second metal transition layer (22) are nickel.
2. The mold for directly molding an aspherical lens diffraction surface of an infrared chalcogenide glass according to claim 1, wherein: the surface of the first metal transition layer (12) is plated with a first noble metal layer (13), and the surface of the second metal transition layer (22) is plated with a second noble metal layer (23).
3. The mold for directly molding the diffractive surface of the aspherical lens of the infrared chalcogenide glass according to claim 2, wherein: the first noble metal layer (13) and the second noble metal layer (23) are made of rare noble metals.
4. The mold for directly molding the diffractive surface of the aspherical lens of the infrared chalcogenide glass according to claim 2, wherein: the thickness of the first noble metal layer (13) and the second noble metal layer (23) is 200+ -20 nm.
5. A mold for direct molding of an infrared chalcogenide glass aspherical lens diffraction surface as claimed in any one of claims 1 to 4, wherein: the difference value < +/-2 between the thermal expansion coefficients of the materials used for the first metal transition layer (12) and the second metal transition layer (22) and the thermal expansion coefficients of the nickel alloys used for the upper die (1) and the lower die (2).
6. The mold for directly molding the diffractive surface of the aspherical lens of the infrared chalcogenide glass according to claim 5, wherein: the upper die (1) and the lower die (2) are made of inconel 718 nickel alloy.
7. A mold for direct molding of an infrared chalcogenide glass aspherical lens diffraction surface as claimed in any one of claims 1 to 4, wherein: the thickness of the first metal transition layer (12) and the second metal transition layer (22) is 0.05+/-0.01 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321158294.1U CN219861046U (en) | 2023-05-15 | 2023-05-15 | Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321158294.1U CN219861046U (en) | 2023-05-15 | 2023-05-15 | Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface |
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| CN219861046U true CN219861046U (en) | 2023-10-20 |
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| CN202321158294.1U Active CN219861046U (en) | 2023-05-15 | 2023-05-15 | Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462390A (en) * | 2023-05-15 | 2023-07-21 | 南京波长光电科技股份有限公司 | A mold capable of directly molding the diffractive surface of an infrared chalcogenide glass aspheric lens and its preparation method |
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2023
- 2023-05-15 CN CN202321158294.1U patent/CN219861046U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462390A (en) * | 2023-05-15 | 2023-07-21 | 南京波长光电科技股份有限公司 | A mold capable of directly molding the diffractive surface of an infrared chalcogenide glass aspheric lens and its preparation method |
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