CN106116127A - A kind of high evenness box-annealing furnace and method for annealing thereof - Google Patents
A kind of high evenness box-annealing furnace and method for annealing thereof Download PDFInfo
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- CN106116127A CN106116127A CN201610431606.XA CN201610431606A CN106116127A CN 106116127 A CN106116127 A CN 106116127A CN 201610431606 A CN201610431606 A CN 201610431606A CN 106116127 A CN106116127 A CN 106116127A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
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Abstract
Entitled a kind of high evenness box-annealing furnace of the present invention and method for annealing thereof.Belong to optical material technical field of heat treatment.The problem that it mainly solves the anneal uniformity difference in existing annealing technology.It is mainly characterized by comprising: described box-annealing furnace be horizontal cross-section be foursquare cubic type box-annealing furnace；Box-annealing furnace burner hearth is provided with heater element along each wall of surrounding, and heater element is externally provided with heat-conducting plate；Being provided with three-dimensional heating post in the middle part of box-annealing furnace burner hearth, heated beam is fixed in the rotary shaft passing through top, rotary shaft with stove outside actuating device be connected.Being greatly improved the warm field uniformity of annealing furnace, when rising gentleness cooling, goods quickly can keep consistent temperature with temperature field, and the center of goods also more they tends to consistent with surface temperature.Using equipment and the goods of method annealing of the present invention, not only individual uniformity is good, and whole stove goods all have high consistency, is suitable for the goods annealing of advanced optical equipment.
Description
Technical field
The invention belongs to optical material technical field of heat treatment, be specifically related to a kind of smart for optical glass or optical element
The device of close annealing.
Background technology
As goods such as the optical glass of optical system or components and parts, drop to low temperature when producing molding from high temperature, goods
Being restricted by conditions such as shape, cooling rate and ambient temperature differences, the rate of temperature fall at goods edge and center differs greatly, i.e.
The thermal history of each position experience is different, causes existing inside goods thermal stress, there is optical heterogeneity simultaneously, the most same
The stress at goods edge and middle part and refractive index etc. all can there are differences.The internal stress of goods to be eliminated and optical heterogeneity,
Goods edge and middle part must be made again to experience identical thermal history, and this is accomplished by carrying out double annealing.
During double annealing, the most just can ensure that the goods of diverse location can experience identical thermal history in annealing furnace
Always double annealing needs the difficult problem solved.The most frequently used annealing furnace is case structure, and goods load in stove, by annealing
The heater installed on the casing of stove controls the temperature inside the box.Goods basis with the rising of ambient temperature, absorbs heat in stove
Amount heats up, and goods itself are insulated wall, and this can cause the individual quick heating around goods heap, cooling fast, the individuality at center
Intensification is slow, cooling is also slow, and the glass heat historical difference causing center and surrounding is big.
Summary of the invention
Present invention aim to address the concordance that perspective is annealed, it is provided that a kind of rational in infrastructure, high uniformly
The box-annealing furnace of degree and method for annealing thereof, solve temperature field problem of non-uniform in the annealing furnace after filling glass, by annealing
The raising of temperature field uniformity in stove, it is achieved the fine annealing of perspective.
The technical solution of annealing furnace of the present invention is: a kind of high evenness box-annealing furnace, it is characterised in that: described case
Formula annealing furnace be horizontal cross-section be foursquare cubic type box-annealing furnace；Box-annealing furnace burner hearth is provided with along each wall of surrounding and sends out
Thermal element, heater element is externally provided with heat-conducting plate；Being provided with three-dimensional heating post in the middle part of box-annealing furnace burner hearth, heated beam is fixed on wears
More in the rotary shaft at top, rotary shaft with stove outside actuating device be connected.
The second zone of heating, the second zone of heating it is provided with in heated beam described in the technical solution of annealing furnace of the present invention
Being surrounded by heat conduction cover, heat is by heat conduction cover to ambient radiation, and heat conduction cover periphery is provided with flabellum, and heated beam can drive when rotating
Cross-ventilation in burner hearth.
Box-annealing furnace burner hearth bottom described in the technical solution of annealing furnace of the present invention is provided with heater element, sends out
Thermal element is externally provided with heat-conducting plate.
A box-annealing furnace burner hearth center at least thermocouple described in the technical solution of annealing furnace of the present invention,
Surrounding each wall upper and lower is respectively distributed a thermocouple.The thermometric of all thermocouples feeds back to control instrument simultaneously
On.
The box-annealing furnace each wall of a burner hearth surrounding at least face described in the technical solution of annealing furnace of the present invention
For movable fire door.
Box-annealing furnace combustion space described in the technical solution of annealing furnace of the present invention is less than 3 cubic metres, mainly
For be pilot fine annealing.
The technical solution of method for annealing of the present invention is: a kind of method for annealing using high evenness box-annealing furnace,
It is characterized in that comprising the following steps:
1. goods shove charge: during glass shove charge, both bulk glasses uses frock isolation, makes between glass and glass, glass and stove
Gap is had at the end；Type part uses pallet that small articles is dressed up dish, and during shove charge, every layer of pallet is all kept apart by frock, this work
Dress isolation can make each face of glass or pallet be heated, and glass temperature and temperature field temperature are highly consistent；
2. heating up: regulation heating element, heated beam power, heater element is heated to burner hearth by heat-conducting plate, and heat conduction is more equal
Even unanimously；Center heated beam has independent power supply unit, can be according to the central hot galvanic couple of instrument feedback and the temperature of edge thermocouple
Degree difference regulates heating power, compensates burner hearth central temperature；10 ~ 80 turns per minute of heated beam velocity of rotation, can promote stove simultaneously
Thorax inner air convection, in the range of making four angle temperature of box-annealing furnace burner hearth spend at 2 DEG C with central temperature difference；
3. insulation: after reaching design temperature, being incubated 6 ~ 24 hours as required, heater element, heated beam work simultaneously, in burner hearth
Each position temperature difference is less than 1 DEG C；
4. cooling: after rate of temperature fall sets according to annealing schedule, instrument controls cooling automatically, and heated beam is according to instrument command power
Minimum is adjustable to 0, but tumbler still can ensure 10 ~ 80 turns, promotes that cross-ventilation realizes fast cooling, and controls burner hearth temperature
Difference is within 2 DEG C；
5. come out of the stove: frock is taken out together with annealing goods, will annealing goods unloading after being cooled to room temperature.
Due to the fact that employing is foursquare cubic type box-annealing furnace in horizontal cross-section, at box-annealing furnace burner hearth
It is provided with heater element along each wall of surrounding, is externally provided with heat-conducting plate at heater element, so can make the heat radiation that heater element produces
On heat-conducting plate, heat is radiated in burner hearth by heat-conducting plate more uniformly.In the middle part of box-annealing furnace burner hearth, it is provided with solid add
Plume, heated beam is fixed in the rotary shaft passing through top, rotary shaft with stove outside actuating device be connected, actuating device drive add
Plume rotation, such heated beam rotary heating, by heat-conducting plate by heat to radiation of burner hearth, efficiently solve annealing furnace center
The problem that temperature is low, is greatly improved the warm field uniformity of whole burner hearth.The heating at body of heater four sides uses one group of power supply unit, center
Heated beam is used alone one group of power supply unit, can regulate power respectively.In conjunction with the present invention distinctive annealing tooling device, can will move back
Goods layered putting in stove, makes goods at least four face to be annealed be heated, such products temperature not only with temperature field temperature
Highly consistent, and the inside and outside temperature of goods is consistent, and the concordance after goods annealing is far above other annealing way.
The method for annealing used during glass annealing: during glass shove charge, need to use supporting Special frock device, by glass
It is separated between every layer and leaves gap, it is ensured that heat can enter gap；When annealing according to annealing schedule, surrounding pair
Glass heats, and central temperature is adjusted compensating mainly by heated beam.
The present invention can meet higher annealing temperature, and temperature control is accurate, and temperature field is uniform, is equipped with special frock and annealing side
Method, it is possible to achieve optical glass and the fine annealing of components and parts.
Accompanying drawing explanation
Fig. 1 is the annealing furnace structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the annealing furnace structure schematic top plan view of the embodiment of the present invention.
Fig. 3 is the heated beam schematic top plan view of the embodiment of the present invention.
In figure: 1-heat-insulation layer；2-the first zone of heating；3-heat-conducting plate；4-heated beam；5-actuating device；6-the second zone of heating；
7-heat conduction cover；8-flabellum.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment is as shown in Figure 1, Figure 2, Figure 3 shows.High uniformity box-annealing furnace of the present invention is by heat-insulation layer the 1, first zone of heating
2, heat-conducting plate 3, heated beam 4 and actuating device 5 are constituted, and wherein heated beam 4 is provided with the second zone of heating 6, heat conduction cover 7 and fan specially
Leaf 8.Box-annealing furnace be horizontal cross-section be foursquare cubic type box-annealing furnace, heat-insulation layer 1 plays thermal insulation effect,
Heat is prevented to scatter and disappear.Box-annealing furnace burner hearth is provided with the first zone of heating 2 along each wall of surrounding, and the first zone of heating 2 is by heater element even
Connecing electrical source of power, carry out heating and lowering the temperature by instrumentation regulation power, the first zone of heating 2 at least sets on four metopes
Put, under base plate, be also provided with the first zone of heating 2 if desired.Heat-conducting plate 3 is close to the first zone of heating 2, has the most high temperature resistant and hot
Lead performance, can absorb rapidly from the heat of the first zone of heating 2 and heat is radiated in burner hearth, owing to heat-conducting layer 3 is overall,
Each point is equably to furnace heat transfer.Being provided with three-dimensional heating post 4 in the middle part of box-annealing furnace burner hearth, heated beam 4 is fixed on passes through top
In the rotary shaft in portion, rotary shaft with stove outside actuating device 5 be connected, actuating device 5 can use motor, and heated beam 4 sets equally
It is equipped with the second zone of heating 6, is close to heat conduction cover 7 outside the second zone of heating 6, flabellum 8 on heat conduction cover 7, is distributed.The internal diameter of heat conduction cover 7 exists
10 ~ 20cm, and heated beam connects as one, and can rotate together along with heated beam.Flabellum 8 is distributed, fan on heat conduction cover 7
Width 2 ~ the 4cm of leaf 8, if quantity can freely be designed to dry tablet as required.Heated beam 4 is used for compensating central temperature, adds simultaneously
Equipped with flabellum 8 on the heat conduction cover 7 of plume, heated beam 4 can be rotated by actuating device 5, and such flabellum 8 can promote whole burner hearth
Cross-ventilation, it is ensured that rise gentleness cooling time burner hearth central temperature consistent with peripheral temperature.Box-annealing furnace burner hearth center is at least
Having a thermocouple, surrounding each wall upper and lower the most at least one thermocouple of distribution, thermocouple assay Temperature Feedback is to control
Instrument processed, realizes A.T.C by software.The each wall of a box-annealing furnace burner hearth surrounding at least face is movable fire door.
Box-annealing furnace combustion space is less than 3 cubic metres, is mainly used in be pilot fine annealing.
The present invention uses the method for annealing of high evenness box-annealing furnace to comprise the following steps:
1. goods shove charge: during glass shove charge, both bulk glasses uses frock isolation, makes between glass and glass, glass and stove
Gap is had at the end；Type part uses pallet that small articles is dressed up dish, and during shove charge, every layer of pallet is all kept apart by frock, this work
Dress isolation can make each face of glass or pallet be heated, and glass temperature and temperature field temperature are highly consistent；
2. heat up: on temperature control instrument, after given heating schedule, instrument automatic control heats up, the heating unit on each wall of temperature-rise period
Part works simultaneously；Center heated beam has single power supply unit, and instrument is according to the temperature difference regulation heating of central hot galvanic couple with surrounding
Post power, compensates burner hearth central temperature；10 ~ 80 turns per minute of heated beam 4 velocity of rotation simultaneously, heated beam rotarily drive air
Convection current, can control the burner hearth temperature difference within 2 DEG C；
3. insulation: can arbitrarily set according to the difference of goods, holding temperature and time, maximum temperature up to 950 DEG C, insulating process
Cross-ventilation in middle burner hearth carries out heat exchange, within thermal gradient energy reaches 1 DEG C；
4. cooling: after rate of temperature fall sets according to annealing schedule, instrument controls automatically cooling, center heating when needing fast cooling
The power of post can regulate to 0, and rotarily drives flabellum work, it is achieved the rate of temperature fall of setting, and keeps the burner hearth temperature difference less than 2
℃；
5. come out of the stove: with fork truck, frock entirety is removed when coming out of the stove, after cooling, unload glass.
In the method for annealing of the present invention, use frock isolation during glass shove charge, can make between glass and glass, glass
And there is gap between furnace bottom；Using pallet during the annealing of type part, type part is spread out in pallet one layer, during shove charge, every layer of pallet is all
Kept apart by frock as both bulk glasses, so can guarantee that products temperature and temperature field temperature are highly consistent.Heat up → insulation →
Temperature-fall period is carried out automatically, and manually according to annealing schedule setting program in instrument, program of running retreats the temperature of stove by instrument
Table automatically controls, and is completed by the power of regulation heating element.When the thermometric at four angles exceedes technique with central temperature difference
During span of control, the heated beam at center starts heating compensation, carries out the heating at burner hearth center.Heated beam is by regulation rotating speed, band
Dynamic burner hearth inner air convection, can by heat evenly be sent to each corner, promote the uniform of temperature field.
In method for annealing of the present invention, the power of heated beam is to be controlled, during operation by special automatic equipment
Setting the permission temperature difference of a central temperature and arbitrary angle thermometric, when the temperature difference is more than setting value, center heated beam starts automatically
And regulate power heating.Until automatically cutting off heated beam power when the temperature difference is less than the permission temperature difference.
Claims (7)
1. a high evenness box-annealing furnace, including box-annealing furnace, it is characterised in that: described box-annealing furnace is that level is cut
Face is foursquare cubic type box-annealing furnace；Box-annealing furnace burner hearth is provided with heater element, heater element along each wall of surrounding
It is externally provided with heat-conducting plate (3)；Being provided with three-dimensional heating post (4) in the middle part of box-annealing furnace burner hearth, heated beam (4) is fixed on passes through top
Rotary shaft on, rotary shaft with stove outside actuating device (5) be connected.
A kind of high evenness box-annealing furnace the most according to claim 1, it is characterised in that: in described heated beam (4)
Be provided with the second zone of heating (6), outside be glued with heat conduction cover (7), flabellum (8) is distributed on heat conduction cover (7).
A kind of high evenness box-annealing furnace the most according to claim 1 and 2, it is characterised in that: described box annealing
Stove burner hearth bottom is provided with heater element, and heater element is externally provided with heat-conducting plate.
A kind of high evenness box-annealing furnace the most according to claim 1 and 2, it is characterised in that: described box annealing
A stove burner hearth center at least thermocouple, surrounding each wall upper and lower is respectively distributed a thermocouple.
A kind of high evenness box-annealing furnace the most according to claim 1 and 2, it is characterised in that: described box annealing
The each wall of a stove burner hearth surrounding at least face is movable fire door.
A kind of high evenness box-annealing furnace the most according to claim 1 and 2, it is characterised in that: described box annealing
Stove combustion space is less than 3 cubic metres.
7. one kind uses the method for annealing of high evenness box-annealing furnace described in claim 1, it is characterised in that include following step
Rapid:
1. goods shove charge: during glass shove charge, both bulk glasses uses frock isolation, makes between glass and glass, glass and stove
Gap is had at the end；Type part uses pallet that small articles is dressed up dish, and during shove charge, every layer of pallet is all kept apart by frock, this work
Dress isolation can make each face of glass or pallet be heated, and glass temperature and temperature field temperature are highly consistent；
2. heat up: regulation heating element, heated beam power, 10 ~ 80 turns per minute of heated beam (4) velocity of rotation, make box simultaneously
Four angle temperature of annealing furnace burner hearth and central temperature difference are in the range of 2 DEG C；
3. insulation: after reaching design temperature, being incubated 6 ~ 24 hours, heater element, heated beam work simultaneously, each position temperature in burner hearth
Difference is less than 1 DEG C, and maximum temperature is less than 950 DEG C；
4. cooling: rate of temperature fall sets according to annealing schedule, and in heater element, heated beam, heating part quits work, heated beam
10 ~ 80 turns per minute of velocity of rotation, and control the burner hearth temperature difference within 2 DEG C；
5. come out of the stove: frock is taken out together with annealing goods, will annealing goods unloading after being cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610431606.XA CN106116127A (en) | 2016-06-16 | 2016-06-16 | A kind of high evenness box-annealing furnace and method for annealing thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610431606.XA CN106116127A (en) | 2016-06-16 | 2016-06-16 | A kind of high evenness box-annealing furnace and method for annealing thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108129011A (en) * | 2017-12-08 | 2018-06-08 | 湖北新华光信息材料有限公司 | A kind of large scale optical glass fine annealing stove |
| CN110255872A (en) * | 2019-06-10 | 2019-09-20 | 成都恒达光学有限公司 | A kind of high light transmission glass tempering technique |
| CN111333311A (en) * | 2018-12-18 | 2020-06-26 | 肖特股份有限公司 | Furnace, in particular cooling furnace |
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| CN204830852U (en) * | 2015-07-24 | 2015-12-02 | 信丰正天伟电子科技有限公司 | Box resistance furnace that temperature is balanced |
| CN105603162A (en) * | 2016-02-23 | 2016-05-25 | 广州宏晟光电科技有限公司 | Box-type annealing furnace and annealing method using same |
| CN205740735U (en) * | 2016-06-16 | 2016-11-30 | 湖北新华光信息材料有限公司 | A kind of high evenness box-annealing furnace |
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Patent Citations (4)
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| CN201354345Y (en) * | 2009-02-20 | 2009-12-02 | 苏州汇科机电设备有限公司 | Radial type heater plate structure for annealing or sintering furnace of electronic product |
| CN204830852U (en) * | 2015-07-24 | 2015-12-02 | 信丰正天伟电子科技有限公司 | Box resistance furnace that temperature is balanced |
| CN105603162A (en) * | 2016-02-23 | 2016-05-25 | 广州宏晟光电科技有限公司 | Box-type annealing furnace and annealing method using same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108129011A (en) * | 2017-12-08 | 2018-06-08 | 湖北新华光信息材料有限公司 | A kind of large scale optical glass fine annealing stove |
| CN108129011B (en) * | 2017-12-08 | 2020-12-29 | 湖北新华光信息材料有限公司 | Precision annealing furnace for large-size optical glass |
| CN111333311A (en) * | 2018-12-18 | 2020-06-26 | 肖特股份有限公司 | Furnace, in particular cooling furnace |
| US11591250B2 (en) | 2018-12-18 | 2023-02-28 | Schott Ag | Furnace for relieving stress from glass products |
| CN111333311B (en) * | 2018-12-18 | 2023-09-05 | 肖特股份有限公司 | Furnace, in particular cooling furnace |
| CN110255872A (en) * | 2019-06-10 | 2019-09-20 | 成都恒达光学有限公司 | A kind of high light transmission glass tempering technique |
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Application publication date: 20161116 |