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CN109678322A - A kind of electromagnetism auxiliary precision hot pressing molding machine of small-bore optical glass device - Google Patents

A kind of electromagnetism auxiliary precision hot pressing molding machine of small-bore optical glass device Download PDF

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Publication number
CN109678322A
CN109678322A CN201910174444.XA CN201910174444A CN109678322A CN 109678322 A CN109678322 A CN 109678322A CN 201910174444 A CN201910174444 A CN 201910174444A CN 109678322 A CN109678322 A CN 109678322A
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CN
China
Prior art keywords
coil
electromagnetic induction
die holder
electromagnetism
induction heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201910174444.XA
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Chinese (zh)
Inventor
唐昆
李典雨
谭可成
张家豪
张先源
毛聪
尹来容
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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Application filed by Changsha University of Science and Technology filed Critical Changsha University of Science and Technology
Priority to CN201910174444.XA priority Critical patent/CN109678322A/en
Publication of CN109678322A publication Critical patent/CN109678322A/en
Withdrawn legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/005Pressing under special atmospheres, e.g. inert, reactive, vacuum, clean
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/12Cooling, heating, or insulating the plunger, the mould, or the glass-pressing machine; cooling or heating of the glass in the mould
    • C03B11/122Heating
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/16Gearing or controlling mechanisms specially adapted for glass presses

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Induction Heating (AREA)

Abstract

The invention discloses a kind of electromagnetism of small-bore optical glass device to assist precision hot pressing molding machine, including drive system, rack, electromagnetism blocking plate one, electromagnetic induction heating system, electromagnetism blocking plate two, electromagnetic induction vibrational system.Wherein, drive system includes upper mounted plate, shaft coupling, ball screw, upper mold fixing axle, servo motor, feed screw nut, drive block;Electromagnetic induction heating system includes import/exhaust mouth one, vacuum (-tight) housing, electromagnetic induction heating coil, import/exhaust mouth two, upper die holder, lower die holder;Electromagnetic induction vibrational system includes shake table, magnet steel lid, upper magnet exciting coil, magnet steel, lower magnet exciting coil, magnet steel bottom, iron core, moving-coil, interior driving coil, outer driving coil, radiating sleeve, bottom plate.Pass through setting electromagnetic induction heating system and vibrational system, the electromagnetic induction heating of hot-forming upper and lower in the process die holder and glass preform can be achieved in the present invention, and the electromagnetic induction of pressurization, molding vibrates auxiliary, prior art deficiency present in is improved, small-bore optical glass device hot-forming precision and quality are improved.

Description

A kind of electromagnetism auxiliary precision hot pressing molding machine of small-bore optical glass device
Technical field
The invention belongs to precision hot pressing field shaping techniques, more particularly, to a kind of electromagnetism of small-bore optical glass device Assist precision hot pressing molding machine.
Background technique
In recent years, all kinds of small-bore optical glass devices are in vehicle-carried, military issue weapons, Medical Devices, consumer electronics Application in product is increasingly extensive.Currently, the high-precision batch micro operations of the class component mainly use precision hot pressing forming technique, Glass preform is placed in the high-precision mold in protective gas environment, pressurization change is carried out to preform under forming temperature Shape finally obtains profile member using annealing, cooling stage.Compared with traditional mechanical polishing method, which has process Less, at low cost, parameter is controllable, advantages of environment protection.However, suppressing small-bore optical glass using precision hot pressing forming technique When element, there are following technical problems: (1) since the turnover rate of glass material is low, when optical element has fine structure, easily Appearance fills not full phenomenon, it is difficult to the shape and size of accurate copy mold die cavity;(2) due to the limit of optical element shape System, preform discontinuity easily lead to the uneven of residual stress distribution in pressed element, to influence the light of element Learn performance;(3) after suppressing for a long time, glass material is easily adhered to cavity surface, it is difficult to demould;(4) it when molding, is discharged not in time The gas of die cavity is squeezed, and easily causes trapped gas phenomenon, influences optical element precision;(5) existing preform heating, either By the infrared lamp except the resistance-type heating plate of mold bottom or model room, it is not high to there is heat transfer efficiency, glass by Hot uneven phenomenon, affects the molding of optical element.
Summary of the invention
For above-mentioned filling existing in the prior art is not full, residual stress distribution is uneven, demoulding is difficult, trapped gas and biography The not high technical problem of the thermal efficiency, the present invention is intended to provide a kind of small-bore optical glass device electromagnetism auxiliary precision hot pressing at Type device.
The technical solution adopted by the present invention to solve the above technical problem is: referring to attached drawing 1~5, the small-bore optics The electromagnetism auxiliary precision hot pressing molding machine of glass elements includes drive system, rack, electromagnetism blocking plate one, electromagnetic induction heating System, electromagnetism blocking plate two, electromagnetic induction vibrational system.
The drive system includes upper mounted plate, shaft coupling, ball screw, upper mold fixing axle, servo motor, screw rod spiral shell Female, drive block;Rack is fixed on by upper mounted plate at the top of the drive system, and passes through electromagnetism blocking plate one and electromagnetic induction Heating system separates;The servo motor is fixed on upper mounted plate bottom, and is connect by shaft coupling with ball screw;The biography It is provided with feed screw nut on motion block, and is connect by feed screw nut with ball screw;The upper mold fixing axle is fixed on drive block Bottom, and its bottom is connect with upper die holder;Therefore, the movement that the servo motor generates, can by shaft coupling, ball screw, Feed screw nut, drive block, upper mold fixing axle, are transferred to upper die holder, so that upper die holder be driven to move above and below, realize that upper die holder adds Pressure, molding and the movement demoulded;
The electromagnetic induction heating system include import/exhaust mouth one, vacuum (-tight) housing, electromagnetic induction heating coil, import/exhaust mouth two, Upper die holder, lower die holder;The electromagnetic induction heating system is fixed between electromagnetism blocking plate one and electromagnetism blocking plate two, and is passed through Electromagnetism blocking plate two and electromagnetic induction vibrational system separate;The electromagnetic induction heating system center be upper die holder and lower die holder, Die cavity between the upper die holder and lower die holder places glass preform;Electromagnetism sense is provided with outside the upper die holder, lower die holder Answer heating coil and vacuum (-tight) housing;The electromagnetic induction heating coil after powered up, generate eddy current effect realize to upper die holder, under The heating of die holder and glass preform;The vacuum (-tight) housing can import/exhaust mouth one, import/exhaust mouth two by upper part, taken out Vacuum is filled with protective gas;
The electromagnetic induction vibrational system include shake table, magnet steel lid, upper magnet exciting coil, magnet steel, lower magnet exciting coil, magnet steel bottom, Iron core, moving-coil, interior driving coil, outer driving coil, radiating sleeve, bottom plate;Electromagnetic induction vibrational system bottom passes through Bottom plate is fixed on rack, at the top of shake table and the bottom of electromagnetism blocking plate two be kept in contact;The magnet steel bottom is fixed It is set on bottom plate, center is fixedly installed iron core;Interior driving line is provided in the middle part of the iron core vertical direction Circle;Moving-coil, outer driving coil, magnet steel and radiating sleeve are respectively arranged with outside the iron core, and the magnet steel is each provided with above and below Upper magnet exciting coil, lower magnet exciting coil;Between the interior driving coil and moving-coil and between moving-coil and outer driving coil, protect Hold certain gap;The iron core, upper magnet exciting coil on radiating sleeve, are fixedly installed magnet steel lid, and the moving-coil passes through magnetic Steel lid, and certain gap is kept between magnet steel lid;The moving-coil top is provided with shake table;When the upper and lower excitation wire When circle each leads into the direct current of opposite direction, magnet steel magnetizes with iron core, between the interior driving coil and moving-coil, Yi Jidong Gap between circle and outer driving coil forms stationary magnetic field;Then, it when the inside and outside driving coil passes to alternating current, drives Moving winding, by the effect of Ampere force, to apply the effect of alternating magnetic field power to moving-coil, makes its drive in above-mentioned stationary magnetic field Shake table vibrates up and down;
The electromagnetism blocking plate one, electromagnetism blocking plate two are individually fixed in rack, and by drive system, electromagnetic induction heating system System, electromagnetic induction vibrational system separate, and prevent influence and mutual interference of the electromagnetic radiation to not homologous ray.
Precision hot pressing molding machine is assisted using the electromagnetism of the small-bore optical glass device, completes optical element pressure Process used by making are as follows: 1, the glass preform is placed in the die cavity between upper and lower die holder, from import/exhaust mouth one, into/ Exhaust outlet two is filled with protective gas;Start the electromagnetic induction heating system, electromagnetic induction heating coil generates after powered up Eddy current effect heats upper and lower die holder and glass preform;When glass preform temperature reaches its hot pressing temperature model It encloses, i.e. its transition temperature TgWhen above, stop heating, kept the temperature.2, start the servomotor, upper die holder is solid in upper mold It is moved downward under the drive of dead axle, and lower die holder is remain stationary at this time.When the upper die holder starts to contact simultaneously with glass preform When pushing, the revolving speed of servo motor is reduced, slows down the downstream rate of upper die holder, until servo motor stalls, under upper die holder stops Row.3, the close contact of the glass preform and upper and lower die holder is kept, and replicates the shape of die cavity.Start electromagnetic induction vibration Dynamic system, upper and lower magnet exciting coil each lead into the direct current of opposite direction, and magnet steel magnetizes with iron core;In interior driving coil and move Gap between circle and between moving-coil and outer driving coil forms stationary magnetic field;Then, the inside and outside driving coil passes to Alternating current, driving coil, by the effect of Ampere force, apply the effect of alternating magnetic field power to moving-coil, make its drive in stationary magnetic field Shake table vibrates up and down;At the same time, start the servo motor, upper die holder continues to push, until closing after molding completely Electromagnetic induction vibrational system.4, completely after molding, keep the pressure between the upper and lower die holder and profile member constant, and hold It is 10 to 100 seconds continuous;Then, existing gas is extracted out from import/exhaust mouth one, import/exhaust mouth two, and re-fill new protectiveness gas Body;Then, keeping the temperature of the upper and lower die holder and profile member is 200 to 220 DEG C, carries out destressing to profile member and moves back Fire.5, after the profile member is cooling, start servo motor, upper die holder uplink, and profile member is taken out from lower die holder.
Compared with prior art, the beneficial effects of the present invention are: (1) is vibrated by electromagnetic induction, accelerate glass material Flowing, improves its turnover rate, fills it in a mold full, improve the formed precision of element;(2) it is shaken by electromagnetic induction It is dynamic, improve preform discontinuity phenomenon, inhibits the concentration of residual stress distribution, improve the optical property of element;(3) pass through Electromagnetic induction vibration, attenuation glass crystal grain improve the coating performance of glass, reduce the adhesion of glass;(4) pass through electromagnetism sense It should vibrate, effectively inhibit the generation of trapped gas phenomenon in mold, improve the accuracy of shape and size duplication;(5) pass through electromagnetism sense The phenomenon that should heating, generate current vortex in a mold, effectively improving heat conduction efficiency, improve preform uneven heating.
Detailed description of the invention
Fig. 1 is the overall structure diagram that electromagnetism assists precision hot pressing molding machine in the specific embodiment of the invention;
Fig. 2 is the drive system schematic diagram that electromagnetism assists precision hot pressing molding machine in the specific embodiment of the invention;
Fig. 3 is the electromagnetic induction vibrational system signal that electromagnetism assists precision hot pressing molding machine in the specific embodiment of the invention Figure;
Fig. 4 is the electromagnetic induction heating system signal that electromagnetism assists precision hot pressing molding machine in the specific embodiment of the invention Figure;
Fig. 5 is that the electromagnetism of small-bore optical glass device in the specific embodiment of the invention assists the molding process of precision hot pressing.
Mark of the figure 1 above into Fig. 5 are as follows: 1, drive system, 2, rack, 3, electromagnetism blocking plate one, 4, electromagnetic induction adds Hot systems, 5, electromagnetism blocking plate two, 6, electromagnetic induction vibrational system, 7, upper mounted plate, 8, shaft coupling, 9, ball screw, 10, on Mould fixing axle, 11, servo motor, 12, feed screw nut, 13, drive block, 14, import/exhaust mouth one, 15, vacuum (-tight) housing, 16, electromagnetism sense Answer heating coil, 17, import/exhaust mouth two, 18, upper die holder, 19, glass preform, 20, lower die holder, 21, shake table, 22, magnet steel Lid, 23, upper magnet exciting coil, 24, magnet steel, 25, lower magnet exciting coil, 26, magnet steel bottom, 27, iron core, 28, moving-coil, 29, interior driving line Circle, 30, outer driving coil, 31, radiating sleeve, 32, bottom plate, 33, profile member.
Specific embodiment
Referring to attached drawing 1~5, the electromagnetism auxiliary precision hot pressing molding machine of the small-bore optical glass device includes driving System 1, rack 2, electromagnetism blocking plate 1, electromagnetic induction heating system 4, electromagnetism blocking plate 25, electromagnetic induction vibrational system 6; The rack 2 uses weldment, material Q235;The matrix of the electromagnetism blocking plate 3,5 uses material for Q235, on its surface Coat one layer of high temperature resistant coating for EMI shielding.
The drive system 1 include upper mounted plate 7, shaft coupling 8, ball screw 9, upper mold fixing axle 10, servo motor 11, Feed screw nut 12, drive block 13;Rack 2 is fixed on by upper mounted plate 7 at the top of the drive system 1, and is blocked by electromagnetism Plate 1 and electromagnetic induction heating system 4 separate;The servo motor 11 is fixed on 7 bottom of upper mounted plate, and passes through shaft coupling 8 It is connect with ball screw 9;It is provided with feed screw nut 12 on the drive block 13, and is connected by feed screw nut 12 and ball screw 9 It connects;The upper mold fixing axle 10 is fixed on 13 bottom of drive block, and its bottom is connect with upper die holder 18;Therefore, the servo electricity The movement that machine 11 generates can be transmitted by shaft coupling 8, ball screw 9, feed screw nut 12, drive block 13, upper mold fixing axle 10 The movement of the pressurization of upper die holder 18, molding and demoulding is realized to upper die holder 18 so that upper die holder 18 be driven to move above and below.
The electromagnetic induction heating system 4 include import/exhaust mouth 1, vacuum (-tight) housing 15, electromagnetic induction heating coil 16, Import/exhaust mouth 2 17, upper die holder 18, lower die holder 20;The electromagnetic induction heating system 4 is fixed on electromagnetism blocking plate 1 and electricity Between magnetic blocking plate 25, and separated by electromagnetism blocking plate 25 and electromagnetic induction vibrational system 6;The electromagnetic induction heating system 4 center of system is upper die holder 18 and lower die holder 20, and the die cavity between the upper die holder 18 and lower die holder 20 places glass preform 19; Electromagnetic induction heating coil 16 and vacuum (-tight) housing 15 are provided with outside the upper die holder 18, lower die holder 20;The electromagnetic induction heating Coil 16 after powered up, generates heating of the eddy current effect realization to upper die holder 18, lower die holder 20 and glass preform 19;It is described Vacuum (-tight) housing 15 can import/exhaust mouth 1, import/exhaust mouth 2 17 by upper part, vacuumized or be filled with protective gas.
The electromagnetic induction vibrational system 6 includes shake table 21, magnet steel lid 22, upper magnet exciting coil 23, magnet steel 24, lower excitation Coil 25, magnet steel bottom 26, iron core 27, moving-coil 28, interior driving coil 29, outer driving coil 30, radiating sleeve 31, bottom plate 32; Rack 2 is fixed on by bottom plate 32 in 6 bottom of electromagnetic induction vibrational system, at the top of shake table 21 and electromagnetism block The bottom of plate 25 is kept in contact;The magnet steel bottom 26 is fixedly installed on bottom plate 32, and center is fixedly installed iron core 27;Interior driving coil 29 is provided in the middle part of 27 vertical direction of iron core;Be respectively arranged with outside the iron core 27 moving-coil 28, Outer driving coil 30, magnet steel 24 and radiating sleeve 31, and the magnet steel 24 is each provided with magnet exciting coil 23, lower excitation wire above and below Circle 25;Between the interior driving coil 29 and moving-coil 28 and between moving-coil 28 and outer driving coil 30, between keeping certain Gap;The iron core 27, upper magnet exciting coil 23 on radiating sleeve 31, are fixedly installed magnet steel lid 22, and the moving-coil 28 passes through magnetic Steel lid 22, and certain gap is kept between magnet steel lid 22;28 top of moving-coil is provided with shake table 21;It encourages on described When magnetic coil 23, lower magnet exciting coil 25 each lead into the direct current of opposite direction, magnet steel 24 magnetizes with iron core 27, in the interior drive Gap between moving winding 29 and moving-coil 28 and between moving-coil 28 and outer driving coil 30 forms stationary magnetic field;Then, when When the interior driving coil 29, outer driving coil 30 pass to alternating current, driving coil is in above-mentioned stationary magnetic field by Ampere force Effect makes it that shake table 21 be driven to vibrate up and down to apply the effect of alternating magnetic field power to moving-coil 28.
The electromagnetism blocking plate 1, electromagnetism blocking plate 25 are individually fixed in rack 2, and by drive system 1, electromagnetic induction Heating system 4, electromagnetic induction vibrational system 6 separate, and prevent influence of the electromagnetic radiation to not homologous ray, and mutual dry It disturbs.
The content that above-mentioned specific embodiment illustrates should be understood as that the specific embodiment is only used for being illustrated more clearly that The present invention, rather than limit the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention each The modification of kind equivalent form falls within the application range as defined in the appended claims.

Claims (1)

1. a kind of electromagnetism of small-bore optical glass device assists precision hot pressing molding machine, it is characterised in that: described small-bore The electromagnetism auxiliary precision hot pressing molding machine of optical glass device includes drive system, rack, electromagnetism blocking plate one, electromagnetic induction Heating system, electromagnetism blocking plate two, electromagnetic induction vibrational system;
The drive system includes upper mounted plate, shaft coupling, ball screw, upper mold fixing axle, servo motor, feed screw nut, biography Motion block;Rack is fixed on by upper mounted plate at the top of the drive system, and passes through electromagnetism blocking plate one and electromagnetic induction heating System partitioning;The servo motor is fixed on upper mounted plate bottom, and is connect by shaft coupling with ball screw;The drive block On be provided with feed screw nut, and connect by feed screw nut with ball screw;The upper mold fixing axle is fixed on drive block bottom, And its bottom is connect with upper die holder;Therefore, the movement that the servo motor generates, can pass through shaft coupling, ball screw, screw rod spiral shell Mother, drive block, upper mold fixing axle, are transferred to upper die holder, so that upper die holder be driven to move above and below, realize upper die holder pressurization, molding With the movement of demoulding;
The electromagnetic induction heating system include import/exhaust mouth one, vacuum (-tight) housing, electromagnetic induction heating coil, import/exhaust mouth two, Upper die holder, lower die holder;The electromagnetic induction heating system is fixed between electromagnetism blocking plate one and electromagnetism blocking plate two, and is passed through Electromagnetism blocking plate two and electromagnetic induction vibrational system separate;The electromagnetic induction heating system center be upper die holder and lower die holder, Die cavity between the upper die holder and lower die holder places glass preform;Electromagnetism sense is provided with outside the upper die holder, lower die holder Answer heating coil and vacuum (-tight) housing;The electromagnetic induction heating coil after powered up, generate eddy current effect realize to upper die holder, under The heating of die holder and glass preform;The vacuum (-tight) housing can import/exhaust mouth one, import/exhaust mouth two by upper part, taken out Vacuum is filled with protective gas;
The electromagnetic induction vibrational system include shake table, magnet steel lid, upper magnet exciting coil, magnet steel, lower magnet exciting coil, magnet steel bottom, Iron core, moving-coil, interior driving coil, outer driving coil, radiating sleeve, bottom plate;Electromagnetic induction vibrational system bottom passes through Bottom plate is fixed on rack, at the top of shake table and the bottom of electromagnetism blocking plate two be kept in contact;The magnet steel bottom is fixed It is set on bottom plate, center is fixedly installed iron core;Interior driving line is provided in the middle part of the iron core vertical direction Circle;Moving-coil, outer driving coil, magnet steel and radiating sleeve are respectively arranged with outside the iron core, and the magnet steel is each provided with above and below Upper magnet exciting coil, lower magnet exciting coil;Between the interior driving coil and moving-coil and between moving-coil and outer driving coil, protect Hold certain gap;The iron core, upper magnet exciting coil on radiating sleeve, are fixedly installed magnet steel lid, and the moving-coil passes through magnetic Steel lid, and certain gap is kept between magnet steel lid;The moving-coil top is provided with shake table;When the upper and lower excitation wire When circle each leads into the direct current of opposite direction, magnet steel magnetizes with iron core, between the interior driving coil and moving-coil, Yi Jidong Gap between circle and outer driving coil forms stationary magnetic field;Then, it when the inside and outside driving coil passes to alternating current, drives Moving winding, by the effect of Ampere force, to apply the effect of alternating magnetic field power to moving-coil, makes its drive in above-mentioned stationary magnetic field Shake table vibrates up and down;
The electromagnetism blocking plate one, electromagnetism blocking plate two are individually fixed in rack, and by drive system, electromagnetic induction heating system System, electromagnetic induction vibrational system separate, and prevent influence and mutual interference of the electromagnetic radiation to not homologous ray.
CN201910174444.XA 2019-03-08 2019-03-08 A kind of electromagnetism auxiliary precision hot pressing molding machine of small-bore optical glass device Withdrawn CN109678322A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114702231A (en) * 2022-04-08 2022-07-05 四川瑞天光学有限责任公司 Heating device and method for hot-press forming die of optical glass

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114702231A (en) * 2022-04-08 2022-07-05 四川瑞天光学有限责任公司 Heating device and method for hot-press forming die of optical glass

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