CN218321129U - Roof prism die mould - Google Patents

Abstract

The utility model discloses a roof prism die mould, through adopting the mould piece that has different angle barocline profiles to divide independent processing, then assemble into the mode of integrative mould benevolence, solved the problem that many roof prism die mould moulds of small size are difficult to process, this kind of mould piece with different angle barocline profiles cost of manufacture is low, assembles integrative mould benevolence and can take multiple modes such as welding, screw connection, has reduced the whole mould pressing cost of many roof prisms, adopts the utility model discloses a roof prism die mould can be used to suppress many roof prisms of multiple shapes such as "plane convex", "plane concave", "convex concave and convex", "biconvex", "biconcave".

Description

Roof prism die mould

Technical Field

The utility model relates to an optical parts processing technology field, concretely relates to roof prism's die mould manufacturing.

Background

A typical roof prism is a single roof or double roof, but in precision optical devices such as optical communication and laser, a micro prism with four or more roofs is required, for example, a prism with four roof surfaces with a 0.7mm × 0.7mm clear dimension can convert and "focus" four parallel beams of light with an input pitch of 0.7mm and output the light to four adjacent photodetectors.

In the prior art, four wedge angle surfaces and a large light transmission plane of a whole piece of glass are generally ground and polished respectively, five polishing surfaces are processed through five times of upper and lower discs, but the roof prism is small in size, high in processing difficulty, low in product percent of pass and high in cost.

Another solution is to process the prism by a molding technique, and to form the glass preform by one-step pressing in a molding press by using an open type molding die, which is referred to as the utility model of patent No. ZL202120141231X, "an open type lens molding die". However, the pressing scheme is adopted, and the small size of the roof prism is also caused, so that the processing of a pressing mold is difficult (particularly, the concave surface of the ridge of the multi-roof ridge is not well processed), and a special mold is required to be designed for manufacturing the small roof prism by pressing.

Disclosure of Invention

An object of the utility model is to provide a roof prism's die mould to solve the problem that proposes in the above-mentioned background art.

The utility model provides a pair of roof prism die mould, its mould benevolence has the mould piece and the combination of mould benevolence base plate of different angle barocline profiles by the multi-disc to form, the multi-disc has the many roof prism's of different angle barocline profile combination formation roof face pressure profile.

Furthermore, the plurality of die sheets with the inclined pressing profiles at different angles and the die core substrate are made of metal, ceramic or glass, and the combination mode of the plurality of die sheets with the inclined pressing profiles at different angles and the die core substrate comprises welding, screw connection, elastic mechanism clamping and glass deepening optical cement connection.

Furthermore, a plurality of roof surface pressing surfaces of the multi-roof prism formed by combining a plurality of inclined pressing surfaces with different angles can be arranged on the pressing surface of one pair of die cores.

Furthermore, the ridge surface pressing surface of the multi-ridge prism formed by combining a plurality of inclined pressing surfaces with different angles can be convex or concave, and the convex or concave pressing surface is arranged on the lower die core and/or the upper die core.

To sum up, owing to adopted above-mentioned technique, the beneficial effects of the utility model are that:

1. the die pieces with the inclined pressing molded surfaces of different angles are separately and independently processed and then assembled into an integral die core, so that the problem that the small-size multi-ridge prism compression die is difficult to process is solved.

2. The die piece with the inclined pressing profiles of different angles is low in manufacturing cost, the integrated die core is assembled in a welding mode, a screw connection mode, an elastic clamping mode, a deepening optical cement mode and other modes, the pressing surfaces of the ridge surfaces of a plurality of multi-ridge prisms can be arranged on the pressing surface of a pair of die cores, and the die pressing cost of the prisms is reduced.

3. The die piece is divided and independently processed and then assembled into an integral die core, and can be used for pressing multi-ridge prisms in various shapes such as plano-convex, plano-concave, convex-concave, double convex, double concave and the like.

Drawings

Fig. 1 is a schematic diagram of a planoconvex four-ridge prism blank strip to be pressed according to the present invention;

FIG. 2 is a schematic diagram of a die structure for pressing a four-roof prism in a plano-convex shape by a die press;

FIG. 3 is a schematic diagram of a die structure for pressing a plano-convex four-roof prism by a die press;

FIG. 4 is a schematic view of an embodiment of the present invention, in which the mold pieces with different-angle inclined pressing surfaces are assembled into an integral mold core;

FIG. 5 is a schematic view of an embodiment of the present invention, in which the mold pieces with different-angle inclined pressing surfaces are assembled into an integral mold core;

FIG. 6 is a schematic view of a mold insert with multiple concave surfaces of multi-ridge molding in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a die for pressing a square concave prism and a square concave prism according to an embodiment of the present invention.

In the figure: 10. a plano-convex four-roof prism; 20. a roof surface; 30. a large light-passing plane; 40. a lower die core; 41. a lower mold core substrate; 42. a die piece with an inclined pressing molded surface; 43. welding spots; 44. a die piece with double inclined pressing molded surfaces; 45. a screw; 46. a lower die core with a flat pressing surface; 50. an upper die core; 51. an upper mold core substrate; 52. a die piece with an inclined pressing molded surface; 60. a U-shaped sleeve; 70. a glass preform; 80. a plano-convex roof prism blank; 81. and (4) forming a flat concave roof prism blank.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, the terms "mounting," "connecting," "fixing," and the like are used in a broad sense, and those skilled in the art can understand the specific meaning of the terms in the present invention according to the specific situation of the specification.

As shown in fig. 1, a four-roof prism of a planoconvex shape is provided, where four roof surfaces 20 are symmetrically distributed on a right light-passing surface of a four-roof prism 10, a left light-passing plane 30 is provided, a typical width of the light-passing plane 30 is 2.8mm (i.e. widths of four inclined planes on the right side are 0.7mm respectively), a typical thickness of the prism at a highest roof is 1.5mm, the prism is usually made into a long strip shape, and then cut into particles according to a required length, for example, into particles with a length of 0.7mm, and the prism having four 0.7 mm-0.7 mm light-passing size ridge surfaces can turn and "converge" four parallel beams of light transmitted from the left side with a pitch of 0.7mm and output the four parallel beams of light to four light detectors on the right side closer to each other (for example, with a pitch of 0.5 mm).

In the prior art, four roof surfaces and a large light-passing surface of a whole glass are generally ground and polished respectively in the prior art for processing the prism, but because the small particle size of the roof prism is small, five polished surfaces need to be processed through five times of top and bottom plates, the processing difficulty is high, the product percent of pass is low, and the cost is high.

Example 1, it is appropriate to process such a small roof prism by using an open die using a die pressing technique, as shown in fig. 2 and 3, a lower die core 40 and an upper die core 50 are placed in a U-shaped sleeve 60, a glass preform 70 (for example, a polished round glass rod) is placed between the upper and lower die cores, a whole fixture is placed in a die press, the upper die core 50 is pressed down after the temperature is raised until the glass preform is limited by the sleeve 60 and cannot go down continuously, the upper die core 50 crushes the preform 70 into a prism billet 80, the plano-convex prism billet 80 is taken out after the die is cooled, the skirt edges protruding from both sides are cut off, and the cut into particles according to the required length, thereby obtaining a finished product of the plano-convex four-roof prism.

In general, a profiling mold is used for engraving and milling a profiling surface on a special tungsten steel material by using a single-point diamond milling cutter. In fig. 2, the profiling surface of the upper mold core 50 is a large flat surface on the lower side thereof, and is easy to machine; the die mould face of lower mould benevolence 40 is the "four ridge" concave surfaces of its upside, difficult processing because ridge face width is very narrow, can't make the "back chipping" effect of ridge department with ball milling cutter, does not have the ridge department of "back chipping", and two interplanars are milling cutter circular arc transition, will influence clear aperture.

For solving foretell "difficult processing of four ridge die mould concave surface moulds" problem, the utility model provides a following technical scheme: the method comprises the steps of respectively making inclined pressing molded surfaces with required angles by using discrete die pieces, then assembling the inclined pressing molded surfaces into an integral die core, and forming four-ridge concave pressing molded surfaces on the integral die core.

As shown in fig. 4, in an embodiment of the present invention, the structure of the lower mold core 40 is changed to be composed of a lower mold core substrate 41 and four mold pieces 42 with inclined pressing surfaces of a desired angle, and the lower mold core substrate 41 and the mold pieces 42 and the four mold pieces 42 are integrated by laser welding, which has the advantages of small heat generation and small welding spots. And the two sides of the assembled lower mold core, the lower mold core base plate 41, are used for matching with the sleeve 60.

The four inclined mould pieces 42 are separately and independently processed, the angles, the sizes, the surface shapes, the roughness and the like of the four inclined mould pieces are easy to guarantee, and the cost is low. The combined four-ridge concave pressing molded surface has the advantage that the fineness of the abutted seam can easily meet the requirement. The four-ridge concave die-shaped surfaces formed by combination can be coated with diamond-like carbon protective films DLC according to the conventional industry.

In example 2, the die plate 42 (and the lower core base plate 41) is made of various materials, usually tungsten steel, and may be made of ceramic or glass, so that laser welding is not the only way to assemble the die plate 42 and the lower core base plate 41, as shown in fig. 5, for example, in an example of the present invention, the die plate 42 and the lower core base plate 41 are connected by screws 45.

The die piece 42 and the lower core substrate 41 may be connected by snap-fitting with an elastic mechanism. If the material of the mold is selected from glass, the connection can be performed by adopting the glass 'deepening optical cement' technology. Since the press mold is subjected to a high temperature environment, the connection method is not suitable for gluing.

In example 3, it should be noted that in the actual mold design, the number of the "four-ridge concave die" on the die core surface may be set not to be one, but to be multiple, so that multiple prism billets 80 can be obtained by one-time molding. As shown in fig. 6, in an embodiment of the present invention, the upper surface of the lower mold core 40 is provided with a plurality of "four-ridge-shaped concave surfaces", wherein the mold piece 44 located at the middle of the plurality of "four-ridge-shaped concave surfaces" may be configured to have two pressing surfaces inclined to both sides.

Embodiment 4, in the above-mentioned several embodiments, the case of pressing "plano-convex" multi-roof prism is taken as an example, and at this time, the mold surface of the mold core is set to be concave, and obviously, the mold surface of the mold core can also be set to be convex, so as to press "plano-concave" multi-roof prism, as shown in fig. 7, in an embodiment of the present invention, the lower mold core 46 is set to have an upper flat pressing surface, the upper mold core is set to be composed of an upper mold core base plate 51 and a mold sheet 52 with a desired angle inclined pressing surface, and the convex mold sheet 52 presses the glass preform into a prism blank strip 81 having a "plano-concave" clear surface, so as to cut the plano-concave multi-roof prism.

Obviously, this kind of protruding or concave profile of pressing can set up on lower mould benevolence and/or upper mould benevolence, uses the utility model provides a "have the multiple die piece combination of required angle profile of pressing to one side" scheme, can design out the mould of suppression "plano-concave", "convex-concave", "biconvex", "biconcave" various prisms.

It should be noted that although the mold with the convex press surface can be made by engraving and milling a single piece of tungsten steel, and there is no back chipping problem, the cost of manufacturing the mold is still lower by the solution of the present application compared to the solution of "multiple mold piece combination with desired angle of inclined press surface" provided by the present application.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (5)

1. The utility model provides a roof prism die mould which characterized in that: the mold core is formed by combining a plurality of mold pieces with inclined pressing molded surfaces at different angles and a mold core substrate, and the inclined pressing molded surfaces at different angles are combined to form a roof surface pressing molded surface of the multi-roof prism.

2. A roof prism profiling mold as claimed in claim 1, wherein: the die pieces with the inclined pressing molded surfaces at different angles and the die core substrate are made of metal, ceramic or glass.

3. A roof prism profiling mold as claimed in claim 1, wherein: the combination mode of the plurality of die pieces with the inclined pressing molded surfaces at different angles and the die core substrate comprises welding, screw connection, elastic mechanism clamping and glass deepening optical cement connection.

4. The roof prism profiling mold as claimed in claim 1, wherein: and a plurality of roof surface pressing surfaces of the multi-roof prism formed by combining a plurality of inclined pressing surfaces with different angles are arranged on the pressing surface of one pair of die cores.

5. The roof prism profiling mold as claimed in claim 1, wherein: the ridge surface pressing surface of the multi-ridge prism formed by combining a plurality of inclined pressing surfaces with different angles is convex or concave, and the convex or concave ridge surface pressing surface is arranged on the lower die core and/or the upper die core.

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