CN105523707A - Microstructure hard alloy die and hot-pressing micro molding manufacturing method thereof - Google Patents
Microstructure hard alloy die and hot-pressing micro molding manufacturing method thereof Download PDFInfo
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- CN105523707A CN105523707A CN201511034974.2A CN201511034974A CN105523707A CN 105523707 A CN105523707 A CN 105523707A CN 201511034974 A CN201511034974 A CN 201511034974A CN 105523707 A CN105523707 A CN 105523707A
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- low power
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B20/00—Processes specially adapted for the production of quartz or fused silica articles, not otherwise provided for
Abstract
The present invention discloses a microstructure hard alloy die comprising a hard alloy die core with micro grooves, the working surface of the hard alloy die core with the micro grooves is provided parallelly with micro groove arrays, the hard alloy die core with the micro grooves is a hard alloy die core with curved-surface micro grooves, wherein the hard alloy die core has the curved working surface, and the micro groove arrays are parallelly arranged on the curved working surface, or, the hard alloy die core with the micro grooves is a hard alloy die core with planar micro grooves, wherein the hard alloy die core has the planar working surface, and the micro groove arrays are parallelly arranged on the planar working surface. The present invention also discloses a hot-pressing micro molding manufacturing method of the microstructure hard alloy die, a workpiece produced by the method is smooth in the microstructure surface, high in precision, simple in process and long in life, hot-pressing forming pressure load is reduced, the molding accuracy and consistency of the microstructure are improved, large-scale practicality of a quartz glass optical element can be promoted, manufacturing cost is reduced, energy is conserved, and emission is reduced.
Description
Technical field
The present invention relates to a kind of hot-forming micro-mould and Micrometer-Nanometer Processing Technology field, be specifically related to a kind of microstructure sintered-carbide die and hot pressing micro shaping manufacture method thereof.
Background technology
Now, silica glass material carries out microstructure design because of surface and can play optical property very well and be widely used, but because it is hard brittle material, simple use machining process, need to carry out its transparent and mirror effect of ductile regime machining guarantee, but the time compole of ductile regime machining is long, does not meet the needs of optical component of quartz glass actual production, promote the optical element performance of silica glass in the urgent need to a kind of technique.Hot pressing micro shaping, as a kind of micro molding process, has product material, geometrical shape and size adaptability is good, cost is low, efficiency is high, and can the series of advantages such as serialization, automatic production, is the important development direction manufacturing mini-product on a large scale.
The micro-mould of hot pressing micro shaping is because of its die cavity and the grand-micro-scale scope of channel size leap, be subject to the impact of dimensional effect, in moulding process melt flowing, heat transfer all different under macro-scale, to the temperature of mould, the demoulding pickup etc. of the ventilation of die cavity, exhaust, micro-plastic has particular requirement, traditional die design Theories and methods is no longer applicable in micro injection molding die design, mainly comprises die temperance control system, exhaust system and ejection system.In micro injection molding, because mold cavity surface to volume ratio is large, cause melt temperature large in filling phase change scope, have a strong impact on Forming Quality and the shaping cycle of micro-plastic, therefore, micro-mould needs design dynamic mold temperature control system usually.Because micro-mould surface processing accuracy is high, when after mould matched moulds, gap between dynamic model and cover half is very little, the gas of air residual in die cavity and melt release is difficult to discharge completely from die cavity gap, this can affect filling melt rate and micro-plastic parts moulding quality, and therefore micro-mould will design vacuum evacuating system.Because micro-plastic part quality is light, wall is thin, intensity is low, traditional mould emptier, the pushing method that namely push rod and plastic directly contact can destroy microstructure, has a strong impact on the Forming Quality of micro-plastic, therefore designs rational micro-plastic pushing method.
In addition, minisize mould making method conventional at present, is utilized MEMS technology to be combined with electrocasting, is realized the preparation of microstructure by photoetching and plasma etching, have the advantage of high precision, mass.But apparatus expensive, mould machine intensity is low, and the life-span is shorter.
Summary of the invention
For above various problems, designing on microstructure Wimet micro-mould injection moulding basis, the present invention devises a kind of microstructure sintered-carbide die and hot pressing micro shaping manufacture method thereof.
The technical solution used in the present invention is as follows:
A kind of microstructure sintered-carbide die, comprise the Wimet core rod of band very low power, the machined surface of the Wimet core rod of described band very low power is provided with micro-cannelure array abreast, and described micro-cannelure array is for the formation of the microstructure on finished parts after hot pressing.
Further, the Wimet core rod of the Wimet core rod of described band very low power to be machined surface the be band curved surface very low power of curved surface, described micro-cannelure array is arranged on described curved surface abreast, machined surface is set to curved surface, its object is to according to research, utilize the favorable optical performance of silica glass, mark on silica glass by very low power core rod, form concave surface very low power silica glass, compare common silica glass now dull and stereotyped, have that guide-lighting efficiency is higher, brightness is higher and luminous evenly etc. feature, increase optical property.
Further, described subsequent corrosion is 200 ~ 600mm
Further, the groove angle of described micro-cannelure array is 10 ° ~ 120 °, and gash depth is 0.1mm ~ 0.6mm, and groove is spaced apart 0.5mm ~ 0.9mm.
Further, the Wimet core rod of the Wimet core rod of described band very low power to be machined surface the be band plane very low power of plane, described micro-cannelure array is arranged on the plane abreast, marks on silica glass by very low power core rod, forms plane very low power silica glass.
Further, the groove angle of described micro-cannelure array is 10 ° ~ 120 °, and gash depth is 0.1mm ~ 0.6mm, and groove is spaced apart 0.5mm ~ 0.9mm.
Further, described micro-cannelure array is processed by the diamond wheel after repairing, and cost is low, technique is simple.
As described in the hot pressing micro shaping manufacture method of microstructure sintered-carbide die, comprise step:
1) be arranged on the upper matched moulds of heat pressing forming machines by the Wimet core rod with very low power described in top plate, by lower bolster, silica glass workpiece be fixed on the lower matched moulds of heat pressing forming machines;
2) according to the top plate temperature parameter preset, the Wimet core rod of band curved surface very low power is heated to 700 DEG C ~ 800 DEG C; ;
3) the upper and lower mould matched moulds of heat pressing forming machines, and process is vacuumized to the hot pressing chamber formed after matched moulds, form vacuum chamber, object is to prevent owing to making the aeration silica glass workpiece surface very low power quality produced in melten glass pressurized process in hot pressing micro shaping process, ensure that the bubble very first time produced is pulled away by vacuum chamber, improve hot-forming surface quality effect;
4) described heat pressing forming machines carries out hot pressing processing according to after the force value preset and the pressurization of hot pressing time value to silica glass workpiece;
6) hot pressing complete after after pressurize 1s ~ 5s, can the demoulding and play a part.
Further, described predetermined temperature value is 700 DEG C ~ 800 DEG C.
Further, hot pressing pressure value is 20Mpa ~ 40Mpa, and hot pressing time value is 1s ~ 5s.
Compared to existing technology, the present invention compared with prior art tool have the following advantages:
(1) compared with ordinary hot molding die, hot pressing micro shaping by temperature, pressure, dwell time, the state modulator such as to vacuumize, accurate hot pressing micro shaping condition, determine the parameter area of high-precision modeling, thus ensure silica glass workpiece surface quality, be easy to realize extensive manufacture and laboratory process research.
(2) diamond wheel after utilizing finishing can make the microstructure with specified shape at workpiece surface, and equipment cost is low compared with the working method based on photoetching, etching, technique is simple.The material that the plastic hardness of diamond wheel is higher.
(3) the workpiece micro-structure surface of working it out is smooth, precision is high.
(4) hot pressing machined surface arranges plane or curved surface, and its mean camber very low power structure can drive silica glass shaping successively very well, reduces hot-forming pressure load, improves formed precision and the consistence of microstructure.
(5) promote the extensive practicality of optical component of quartz glass, reduce manufacturing cost, very low power design can strengthen effects of energy saving and emission reduction.
Accompanying drawing explanation
Fig. 1 is the Wimet core rod schematic three dimensional views of band curved surface very low power.
Fig. 2 is the Wimet core rod schematic three dimensional views of band plane very low power.
Fig. 3 is the Wimet core rod schematic front view of band curved surface very low power.
Fig. 4 is the Wimet core rod schematic front view of band plane very low power.
Fig. 5 is hot pressing micro molding process schematic flow sheet.
Fig. 6 is the hot-press arrangement partial schematic diagram of the Wimet core rod hot pressing micro shaping workpiece of band curved surface very low power.
Fig. 7 is the hot-press arrangement partial schematic diagram of the Wimet core rod hot pressing micro shaping workpiece of band plane very low power.
Fig. 8 is hot pressing micro shaping principle microcosmic schematic diagram.
Shown in figure: 1-is with the Wimet core rod of curved surface very low power; 2-groove angle; 3-gash depth; 4-groove interval; 5-subsequent corrosion; The upper matched moulds of 6-heat pressing forming machines; The lower matched moulds of 7-heat pressing forming machines; 8-silica glass workpiece; 9-thermocompressor pressure; 10-lower bolster; 11-vacuum chamber; 12-top plate; Masterplate temperature control module on 13-thermocompressor; 14-temperature distortion region; 15-is with the Wimet core rod of plane very low power.
Embodiment
For better understanding the present invention, below in conjunction with drawings and Examples, the present invention is described further, but the scope of protection of present invention is not limited to the scope that embodiment represents.
embodiment one
As shown in figures 1 and 3, a kind of microstructure sintered-carbide die, comprise the Wimet core rod of band very low power, the Wimet core rod 1 of the described Wimet core rod comprising band very low power to be machined surface the be band curved surface very low power of curved surface, described micro-cannelure array is arranged on described curved surface abreast, and described subsequent corrosion 5 is R=400mm, and the groove angle 2 of described micro-cannelure array is θ=70 °, gash depth 3 is h=0.4mm, and groove interval 4 is a=0.7mm.
Described micro-cannelure array is for the formation of the microstructure on finished parts after hot pressing, the machined surface being wherein with the Wimet core rod 1 of curved surface very low power is curved surface, its object is to according to research, utilize the favorable optical performance of silica glass, mark on silica glass by curved surface very low power core rod, form concave surface very low power silica glass, compare common silica glass now dull and stereotyped, have that guide-lighting efficiency is higher, brightness is higher and luminous evenly etc. feature, increase optical property.
embodiment two
As shown in Figure 2 and Figure 4, a kind of microstructure sintered-carbide die, comprise the Wimet core rod of band very low power, the Wimet core rod (15) of the Wimet core rod of described band very low power to be machined surface the be band plane very low power of plane, described micro-cannelure array is arranged on the plane abreast, the groove angle 2 of described micro-cannelure array is θ=50 °, and gash depth 3 is h=0.6mm, and groove interval 4 is a=0.9mm;
The micro-cannelure array of above-described embodiment is processed by the diamond wheel after repairing, specifically, during processing curve micro-cannelure array, first the Wimet core rod 1 of the band curved surface very low power wearing into predetermined size and surfaceness is clipped on vice, vice is fixed on magnetic force platform, the diamond wheel of the coarsness trimmed is adopted on Wimet core rod 1 curved surface of band curved surface very low power by curved surface forming algorithm after mixing up position, three travelling wheelhead roll grinder grindings are utilized to go out to have the microstructure of wheel face shape, then, in same orientation, fine-grained diamond wheel is utilized to be refined by the workpiece after slightly shaping, process more smooth surface.
The diamond wheel of described coarsness is made up of diamond abrasive and bronze binding agent, and diamond abrasive granularity is 60 ~ 200 orders; Described fine-grained emery wheel is made up of diamond abrasive and resinoid bond, diamond abrasive granularity 1500 ~ 4000 order.Grinding wheel speed is 2000 ~ 5000 revs/min; In the thick molding process of microstructure, emery wheel feeding depth is 10 ~ 40 microns/every stroke, and speed of feed is 5 ~ 30mm/min; The shaping feeding depth of precision work is 1 ~ 10 micron/every stroke, and speed of feed is 1 ~ 5mm/min.
embodiment three
As shown in Fig. 6 and Fig. 7 and Fig. 8, a kind of as described in the hot pressing micro shaping manufacture method of microstructure sintered-carbide die, comprise step:
1) by top plate 12, the Wimet core rod 15 of the Wimet core rod 1 of described band curved surface very low power or band plane very low power is arranged on the upper matched moulds 6 of heat pressing forming machines, by lower bolster 10, silica glass workpiece 8 is fixed on the lower matched moulds 7 of heat pressing forming machines;
2) according to top plate 12 temperature parameter preset, the Wimet core rod 15 of the Wimet core rod 1 of band curved surface very low power or band plane very low power is heated to 700 ° ~ 800 °, described predetermined temperature value is 750 °, and this is realized by masterplate temperature control module 13 on thermocompressor;
3) the upper and lower mould matched moulds of heat pressing forming machines, and process is vacuumized to the hot pressing chamber formed after matched moulds, object is to prevent owing to making the surperficial very low power quality of aeration silica glass workpiece 8 produced in melten glass pressurized process in hot pressing micro shaping process, ensure that the bubble very first time produced is pulled away by vacuum chamber, improve hot-forming surface quality effect;
4) described heat pressing forming machines carries out hot pressing processing (see Fig. 6 and Fig. 7) according to after the force value preset and the pressurization of hot pressing time value to silica glass workpiece 8, described hot pressing pressure value is 20Mpa ~ 40Mpa, hot pressing dwell time value is 3s, Wimet core rod 15 machined surface of the Wimet core rod 1 with curved surface very low power or band plane very low power and silica glass workpiece 8, under the effect of thermocompressor pressure 9, make silica glass workpiece 8 temperature distortion be formed and see Fig. 8 with described curved surface micro-cannelure array or the temperature distortion region 14(that is with plane micro-cannelure array corresponding);
6) hot pressing complete after after pressurize 1s ~ 5s, can the demoulding and play a part.
The hot pressing micro shaping manufacture method of the present embodiment, relative to ordinary hot molding die, hot pressing micro shaping by temperature, pressure, dwell time, the state modulator such as to vacuumize, accurate hot pressing micro shaping condition, determine the parameter area of high-precision modeling, thus ensure silica glass workpiece surface quality, be easy to realize extensive manufacture and laboratory process research.The Wimet core rod 15 of the Wimet core rod 1 with curved surface very low power or band plane very low power can utilize the diamond wheel after finishing can produce the microstructure with specified shape at workpiece surface, and equipment cost is low compared with the working method based on photoetching, etching, technique is simple.The material that the plastic hardness of diamond wheel is higher, i.e. Hardmetal materials; The workpiece micro-structure surface that hot pressing micro shaping manufacture method the subject of knowledge and the object of knowledge is worked it out is smooth, precision is high.And hot pressing machined surface arranges plane or curved surface, its mean camber very low power structure can drive silica glass shaping successively very well, reduces hot-forming pressure load, improves formed precision and the consistence of microstructure.The present invention promotes the extensive practicality of optical component of quartz glass, reduces manufacturing cost, and very low power design can strengthen effects of energy saving and emission reduction.
The above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (10)
1. a microstructure sintered-carbide die, is characterized in that: the Wimet core rod comprising band very low power, the machined surface of the Wimet core rod of described band very low power is provided with micro-cannelure array abreast.
2. microstructure sintered-carbide die according to claim 1, it is characterized in that: the Wimet core rod (1) of the Wimet core rod of described band very low power to be machined surface the be band curved surface very low power of curved surface, described micro-cannelure array is arranged on described curved surface abreast.
3. microstructure sintered-carbide die according to claim 2, is characterized in that: described subsequent corrosion (5) is 200 ~ 600mm.
4. microstructure sintered-carbide die according to claim 3, it is characterized in that: the groove angle (2) of described micro-cannelure array is 10 ° ~ 120 °, gash depth (3) is 0.1mm ~ 0.6mm, and groove interval (4) are 0.5mm ~ 0.9mm.
5. microstructure sintered-carbide die according to claim 1, it is characterized in that: the Wimet core rod (15) of the Wimet core rod of described band very low power to be machined surface the be band plane very low power of plane, described micro-cannelure array is arranged on the plane abreast.
6. microstructure sintered-carbide die according to claim 5, it is characterized in that: the groove angle (2) of described micro-cannelure array is 10 ° ~ 120 °, gash depth (3) is 0.1mm ~ 0.6mm, and groove interval (4) are 0.5mm ~ 0.9mm.
7. microstructure sintered-carbide die according to any one of claim 1 to 6, is characterized in that: described micro-cannelure array is processed by the diamond wheel after repairing.
8., as weighed a hot pressing micro shaping manufacture method for microstructure sintered-carbide die according to any one of 1 to power 7, it is characterized in that, comprise step:
1) by top plate (12), the Wimet core rod of described band very low power is arranged on the upper matched moulds (6) of heat pressing forming machines, by lower bolster (10), silica glass workpiece (8) is fixed on the lower matched moulds (7) of heat pressing forming machines;
2) according to top plate (12) temperature parameter preset, the Wimet core rod (2) of band curved surface very low power is heated to 700 DEG C ~ 800 DEG C;
3) the upper and lower mould matched moulds of heat pressing forming machines, and process is vacuumized to the hot pressing chamber formed after matched moulds, form vacuum chamber (11);
4) described heat pressing forming machines is according to the force value preset and dwell time value, pressurizes, and carries out the processing of hot pressing micro shaping to silica glass workpiece (8);
6) hot pressing complete after after pressurize 1s ~ 5s, can the demoulding and play a part.
9. hot pressing micro shaping manufacture method according to claim 8, is characterized in that: described predetermined temperature value is 700 DEG C ~ 800 DEG C.
10. hot pressing micro shaping manufacture method according to claim 8, it is characterized in that: hot pressing pressure value is 20Mpa ~ 40Mpa, hot pressing time value is 1s ~ 5s.
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| CN201511034974.2A CN105523707B (en) | 2015-12-31 | 2015-12-31 | A kind of micro-structure sintered-carbide die and its hot pressing micro shaping manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904666A (en) * | 2021-01-22 | 2021-06-04 | 佛山科学技术学院 | High aspect ratio microstructure array mold core, processing device and manufacturing method |
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2015
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| CN1405104A (en) * | 1995-07-18 | 2003-03-26 | 松下电器产业株式会社 | Optical element, optical-element formation mould and method thereof |
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| CN112904666A (en) * | 2021-01-22 | 2021-06-04 | 佛山科学技术学院 | High aspect ratio microstructure array mold core, processing device and manufacturing method |
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