CN115650560B - Meniscus lens processing die and processing technology thereof - Google Patents
Meniscus lens processing die and processing technology thereof Download PDFInfo
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- CN115650560B CN115650560B CN202211490403.XA CN202211490403A CN115650560B CN 115650560 B CN115650560 B CN 115650560B CN 202211490403 A CN202211490403 A CN 202211490403A CN 115650560 B CN115650560 B CN 115650560B
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- die
- sleeve
- meniscus lens
- upper flat
- molding
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- 230000005499 meniscus Effects 0.000 title claims abstract description 62
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims description 44
- 238000007664 blowing Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- 238000007723 die pressing method Methods 0.000 abstract description 7
- 230000003746 surface roughness Effects 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 230000004075 alteration Effects 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000005304 optical glass Substances 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a meniscus lens processing die and a processing technology thereof, wherein the meniscus lens processing die comprises a sleeve, a heating coil, a lower female die, an upper flat die and an upper male die, the heating coil is wound on the outer side of the sleeve, the sleeve is sleeved on the outer side of the lower female die, and the lower female die is positioned at the bottom of the sleeve. According to the invention, the prefabricated part is placed on the lower female die in the sleeve, then the upper flat die is placed in the sleeve, and then the first die pressing is carried out, the upper male die is replaced, and the die pressing is carried out again, so that a finished product of the meniscus lens can be manufactured, the process flow is simplified, and the production efficiency of the meniscus lens is improved; the prefabricated member is processed through an isothermal pressurizing method, and the lower female die, the upper male die and the upper flat die which are made of tungsten steel alloy enable the surface shape of the lower female die, the upper male die or the upper flat die to be directly copied when the prefabricated member is manufactured into the meniscus lens, so that the dimensional accuracy, the surface shape accuracy and the surface roughness of the formed meniscus lens are ensured, and the processing accuracy of the meniscus lens is improved.
Description
Technical Field
The invention relates to the technical field, in particular to a meniscus lens processing die and a processing technology thereof.
Background
The meniscus lens is a meniscus lens, the lens has a convex mirror surface and a concave mirror surface, and if the convex radian is larger than the concave radian, the lens has a positive focal length and is used as a magnifying lens; if the concave side curvature is large and the convex side curvature is small, the lens is a negative meniscus lens, and the negative meniscus lens can be used for replacing other negative lenses. Meniscus lenses are used to reduce spherical aberration to a greater extent, and smaller focal points and less aberrations than plano-convex lenses can be obtained to improve imaging quality. When used in combination with another lens, a positive meniscus lens can shorten the focal length, thereby increasing the Numerical Aperture (NA) of the system without introducing significant spherical aberration, and the convex surface of the lens should face the light source when used to concentrate collimated light.
With the continuous development of science and technology, the processing method of optical glass becomes more and more diversified, and in patent document CN 102490103A, a processing method of meniscus lens is disclosed, which is completed by conventional optical glass cold processing technologies such as blanking, milling, coarse grinding, fine grinding, polishing and the like;
however, the above processing method has a lot of processing steps, low production efficiency, and cannot ensure the surface quality of the molded meniscus lens.
Therefore, it is necessary to invent a meniscus lens processing mold and a processing technique thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a meniscus lens processing die and a processing technology thereof, wherein a preformed unit is placed on a lower female die in a sleeve, an upper flat die is placed in the sleeve and then is subjected to primary die pressing, an upper male die is replaced and the die pressing is performed again, so that a meniscus lens finished product can be manufactured, the processing procedure is simplified, and the production efficiency of the meniscus lens is improved; furthermore, when the prefabricated member is manufactured into the meniscus lens by an isothermal pressurizing method, the surface shape of the lower concave die, the upper convex die or the upper flat die can be directly copied, and the lower concave die, the upper convex die and the upper flat die which are manufactured by tungsten steel alloy can be repeatedly used for a plurality of times and still cannot deform, so that the method has high consistency and repeated precision, ensures the dimensional precision, the surface shape precision and the surface roughness of the molded meniscus lens, improves the processing precision while improving the processing efficiency of the meniscus lens, and solves the defects in the technology.
In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a meniscus lens mold processing, includes sleeve, heating coil and lower die, the heating coil winding sets up in telescopic outside, the outside at lower die is established to the sleeve cover, and lower die is located telescopic bottom, sleeve top is inside to be provided with and is used for meniscus lens fashioned upper flat die or upper punch.
Preferably, the sleeve and the lower die are connected with an external die press base.
Preferably, the upper flat die, the lower concave die and the upper convex die are all matched with the sleeve.
Preferably, the sleeve, the lower female die, the upper male die and the upper flat die are made of tungsten steel alloy.
A processing technology of a meniscus lens comprises the following steps.
A. Cleaning the lower female die, and placing the prefabricated member for manufacturing the meniscus lens on the lower female die;
B. placing the cleaned upper flat die into a sleeve;
C. molding the prefabricated member, wherein one surface of the prefabricated member is processed into a convex surface, and the other surface of the prefabricated member is processed into a plane;
D. taking out the upper flat die, and putting the cleaned upper male die into a sleeve;
E. molding the prefabricated member, and processing the plane into a concave surface;
F. taking out the finished product of the meniscus lens.
Preferably, the step A specifically comprises the following steps: ensuring the level of the molding press, fixing a lower female die on a base of the molding press through an external clamp, blowing the lower female die by using an air gun to clean the surface of the lower female die, and placing a prefabricated member for manufacturing a meniscus lens on the lower female die in the molding press;
the step B is specifically as follows: blowing the upper flat die by using an air gun to clean the surface of the upper flat die, and putting the cleaned upper flat die into a sleeve;
the step C is specifically as follows: the heating coil is electrified to heat the sleeve, so that the prefabricated part is heated and softened, the movable molding press base is pushed into a molding area, and is pressed downwards through an external cylinder to be molded, so that a semi-finished lens with a convex lower part and a plane upper part is manufactured;
the step D is specifically as follows: resetting a base of a molding press, opening the molding press, removing the upper flat die, blowing the upper male die by using an air gun to clean the surface of the upper male die, and putting the cleaned upper pattern die into a sleeve;
the step E specifically comprises the following steps: pushing the movable molding press base into the molding area again, and pressing downwards through an external cylinder to mold, so as to obtain a finished product of the meniscus lens with the convex lower part and the concave upper part;
the step F is specifically as follows: resetting the base of the molding machine, opening the molding machine, and taking out the finished product of the meniscus lens.
Preferably, the steps C, D and E are performed under nitrogen atmosphere.
Preferably, the preform is provided in the form of a sphere.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the prefabricated member is placed on the lower female die in the sleeve, then the upper flat die is placed in the sleeve, die pressing is carried out, the upper male die is replaced, and die pressing is carried out again, so that a finished product of the meniscus lens can be manufactured, and the whole process only needs two die pressing without the traditional ten or more processing procedures, so that the production efficiency of the meniscus lens is improved, the processing procedures are simplified, the processing cost is reduced, and the batch production of the meniscus lens is realized;
2. the invention processes the prefabricated member by isothermal pressurizing method, when the prefabricated member is manufactured into the meniscus lens, the surface shape of the lower concave die, the upper convex die or the upper flat die can be directly copied, the lower concave die, the upper convex die and the upper flat die which are made of tungsten steel alloy can be repeatedly used for a plurality of times and still do not deform, and the prefabricated member has high consistency and repetition precision, thereby realizing indirect control on the processing precision of the meniscus lens by controlling the precision of the lower concave die, the upper convex die or the upper flat die, ensuring the dimensional precision, the surface shape precision and the surface roughness of the formed meniscus lens, and improving the processing precision while improving the processing efficiency of the meniscus lens.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of a spherical preform of the present invention;
FIG. 3 is a schematic view of a first molding of the present invention;
FIG. 4 is a schematic view of a preform of the present invention being fabricated into a semi-finished lens;
FIG. 5 is a schematic view of a second molding of the present invention;
FIG. 6 is a schematic view of a preform made of a meniscus lens of the present invention.
Reference numerals illustrate:
1 upper flat die, 2 prefabricated part, 3 lower concave die, 4 sleeve, 5 heating coil, 6 upper convex die.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
The invention provides a meniscus lens processing mould as shown in figures 1-6, which comprises a sleeve 4, a heating coil 5 and a lower female die 3, wherein the heating coil 5 is wound on the outer side of the sleeve 4, the sleeve 4 is sleeved on the outer side of the lower female die 3, the lower female die 3 is positioned at the bottom of the sleeve 4, and an upper flat die 1 or an upper male die 6 for forming a meniscus lens is arranged inside the top end of the sleeve 4.
Further, in the above technical solution, the sleeve 4 and the lower die 3 are connected with an external molding machine base.
Furthermore, in the above technical solution, the upper flat die 1, the lower die 3 and the upper punch 6 are all adapted to the sleeve 4.
Further, in the above technical solution, the sleeve 4, the lower die 3, the upper punch 6 and the upper flat die 1 are made of tungsten steel alloy.
A processing technology of a meniscus lens comprises the following steps.
A. Cleaning the lower concave die 3, and placing the prefabricated member 2 for manufacturing the meniscus lens on the lower concave die 3;
B. placing the cleaned upper flat die 1 into a sleeve 4;
C. molding the prefabricated member 2, wherein one surface of the prefabricated member is processed into a convex surface, and the other surface of the prefabricated member is processed into a plane;
D. taking out the upper flat die 1, and putting the cleaned upper male die 6 into the sleeve 4;
E. molding the prefabricated member 2 to form the plane into a concave surface;
F. taking out the finished product of the meniscus lens.
Example 1, step a: ensuring the level of a molding press, fixing a lower female die 3 on a base of the molding press through an external clamp, blowing the lower female die 3 by using an air gun to clean the surface of the lower female die 3, and placing a spherical prefabricated member 2 for manufacturing a meniscus lens on the lower female die 3 in the molding press;
and (B) step (B): blowing the upper flat die 1 by using an air gun to clean the surface of the upper flat die 1, and putting the cleaned upper flat die 1 into the sleeve 4;
step C: in a nitrogen environment, a heating coil 5 is electrified to heat a sleeve 4, so that a prefabricated member 2 is heated and softened, a movable molding press base is pushed into a molding area, and is pressed downwards through an external cylinder to be molded, so that a semi-finished lens with a convex lower part and a planar upper part is manufactured;
step D: resetting a base of a molding press, opening the molding press, removing the upper flat die 1, blowing the upper male die 6 by using an air gun to clean the surface of the upper male die 6, and putting the cleaned upper male die 6 into the sleeve 4;
step E: pushing the movable molding press base into the molding area again in a nitrogen environment, and pressing downwards through an external cylinder to mold, so as to obtain a finished product of the meniscus lens with the convex lower part and the concave upper part;
step F: resetting the base of the molding machine, opening the molding machine, and taking out the finished product of the meniscus lens.
Working principle: as is well known, in the conventional glass lens compression molding method, an optical glass blank in a molten state is poured into a low-temperature mold at a temperature of 50 ℃ or higher than a glass transition point for compression molding, the method is not only easy to cause glass adhesion on a mold surface of the mold, but also easy to generate air holes and cold mold marks, and ideal shape and surface shape precision are not easily obtained, the method is not described in detail in the prior art, while the invention adopts a compression mold processed by a tungsten steel alloy material, in an oxidation-free environment filled with nitrogen, a preform 2 made into a meniscus lens and a mold body assembled by a sleeve 4, a lower die 3 and an upper flat die 1 or an upper flat die 6 are heated to a softening point of the preform 2, the preform 2 is pressurized by the mold under the same temperature condition of the glass and the mold body, while the mold body is cooled, the temperature of the preform 2 is reduced to a glass viscosity of 107.6 poise below the softening point of the preform 2, the glass viscosity of the glass at the glass transition point is 1013 poise, namely, the preform 2 is processed by an isothermal compression molding method, the surface precision of the preform 2 is directly controlled by the upper flat die 1 or lower flat die 6, the surface of the conventional flat die 1 is processed by the diamond, the precision is not described in the manner, and the surface precision of the surface of the flat die 1 is directly controlled by the flat die 1 or the flat die 6, the surface is processed by the flat die 1 or the surface precision is not well controlled, the upper male die 6 of the lower female die 3 and the upper flat die 1 can still ensure that the outer surface is not deformed after repeated use for a plurality of times, thereby ensuring the consistency and the repeated precision of production and rapidly manufacturing a finished product of the meniscus lens with better precision.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (2)
1. A processing technology of a meniscus lens is characterized in that: the device comprises a meniscus lens processing mould, wherein the meniscus lens processing mould comprises a sleeve (4), a heating coil (5), a lower concave mould (3), an upper flat mould (1) and an upper convex mould (6), the heating coil (5) is wound on the outer side of the sleeve (4), the sleeve (4) is sleeved on the outer side of the lower concave mould (3), the lower concave mould (3) is positioned at the bottom of the sleeve (4), and the upper flat mould (1) or the upper convex mould (6) for forming a meniscus lens is arranged inside the top end of the sleeve (4);
the sleeve (4) and the lower female die (3) are connected with an external molding press base;
the upper flat die (1), the lower concave die (3) and the upper convex die (6) are all matched with the sleeve (4);
the sleeve (4), the lower female die (3), the upper male die (6) and the upper flat die (1) are made of tungsten steel alloy;
a processing technology of a meniscus lens comprises the following specific steps:
A. cleaning a lower female die (3), and placing a prefabricated member (2) for manufacturing a meniscus lens on the lower female die (3);
B. placing the cleaned upper flat die (1) into a sleeve (4);
C. molding the prefabricated member (2), wherein one surface of the prefabricated member is processed into a convex surface, and the other surface of the prefabricated member is processed into a plane;
D. taking out the upper flat die (1), and putting the cleaned upper male die (6) into the sleeve (4);
E. molding the prefabricated part (2), and processing the plane into a concave surface;
F. taking out the finished product of the meniscus lens;
the step A specifically comprises the following steps: ensuring the level of a molding press, fixing a lower female die (3) on a base of the molding press through an external clamp, blowing the lower female die (3) by using an air gun to clean the surface of the lower female die, and placing a prefabricated member (2) for manufacturing a meniscus lens on the lower female die (3) in the molding press;
the step B is specifically as follows: blowing the upper flat die (1) by using an air gun to clean the surface of the upper flat die (1), and putting the cleaned upper flat die (1) into the sleeve (4);
the step C is specifically as follows: the heating coil (5) is electrified to heat the sleeve (4), so that the prefabricated part (2) is heated and softened, the movable molding press base is pushed into a molding area, and the molding area is pressed downwards through an external cylinder to manufacture a semi-finished lens with a convex lower part and a plane upper part;
the step D is specifically as follows: resetting a base of a molding press, opening the molding press, removing the upper flat die (1), blowing the upper male die (6) by using an air gun to clean the surface of the upper male die, and putting the cleaned upper male die (6) into the sleeve (4);
the step E specifically comprises the following steps: pushing the movable molding press base into the molding area again, and pressing downwards through an external cylinder to mold, so as to obtain a finished product of the meniscus lens with the convex lower part and the concave upper part;
the step F is specifically as follows: resetting a molding machine base, opening the molding machine, and taking out a finished product of the meniscus lens;
wherein, the steps C, D and E are performed under nitrogen atmosphere.
2. A meniscus lens manufacturing process according to claim 1, wherein: the prefabricated member (2) is arranged in a spherical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490403.XA CN115650560B (en) | 2022-11-25 | 2022-11-25 | Meniscus lens processing die and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490403.XA CN115650560B (en) | 2022-11-25 | 2022-11-25 | Meniscus lens processing die and processing technology thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115650560A CN115650560A (en) | 2023-01-31 |
| CN115650560B true CN115650560B (en) | 2024-01-05 |
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| CN202211490403.XA Active CN115650560B (en) | 2022-11-25 | 2022-11-25 | Meniscus lens processing die and processing technology thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000159527A (en) * | 1998-11-27 | 2000-06-13 | Sony Corp | Meniscus lens and its production |
| JP2008310053A (en) * | 2007-06-14 | 2008-12-25 | Hoya Corp | Meniscus lens and its molding method |
| CN101844860A (en) * | 2010-05-27 | 2010-09-29 | 王海军 | Multi-curved-surface processing method of precise glass lens and die pressing device |
| CN106168687A (en) * | 2016-08-03 | 2016-11-30 | 福州巴斯光电技术有限公司 | A kind of processing method of combined biconvex eyeglass |
| CN107298524A (en) * | 2017-06-08 | 2017-10-27 | 深圳市天阳谷科技发展有限公司 | A kind of major diameter non-spherical lens preparation method |
| CN110304816A (en) * | 2019-01-25 | 2019-10-08 | 北京理工大学 | A kind of glass lens manufacturing method that array formation is cut one by one |
| CN112194350A (en) * | 2020-10-14 | 2021-01-08 | 东莞市凯融光学科技有限公司 | Die pressing method of array lens with convex surface |
-
2022
- 2022-11-25 CN CN202211490403.XA patent/CN115650560B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000159527A (en) * | 1998-11-27 | 2000-06-13 | Sony Corp | Meniscus lens and its production |
| JP2008310053A (en) * | 2007-06-14 | 2008-12-25 | Hoya Corp | Meniscus lens and its molding method |
| CN101844860A (en) * | 2010-05-27 | 2010-09-29 | 王海军 | Multi-curved-surface processing method of precise glass lens and die pressing device |
| CN106168687A (en) * | 2016-08-03 | 2016-11-30 | 福州巴斯光电技术有限公司 | A kind of processing method of combined biconvex eyeglass |
| CN107298524A (en) * | 2017-06-08 | 2017-10-27 | 深圳市天阳谷科技发展有限公司 | A kind of major diameter non-spherical lens preparation method |
| CN110304816A (en) * | 2019-01-25 | 2019-10-08 | 北京理工大学 | A kind of glass lens manufacturing method that array formation is cut one by one |
| CN112194350A (en) * | 2020-10-14 | 2021-01-08 | 东莞市凯融光学科技有限公司 | Die pressing method of array lens with convex surface |
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| CN115650560A (en) | 2023-01-31 |
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