CN105047523B - A kind of method of filament shaping - Google Patents
A kind of method of filament shaping Download PDFInfo
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- CN105047523B CN105047523B CN201510327346.7A CN201510327346A CN105047523B CN 105047523 B CN105047523 B CN 105047523B CN 201510327346 A CN201510327346 A CN 201510327346A CN 105047523 B CN105047523 B CN 105047523B
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- filament
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- pressure regulator
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- heater current
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Abstract
The invention discloses a kind of method of filament shaping, pure tungsten cathode assembly is placed in bell-jar vacuum drying oven, by the mode of connection of equipment, filament voltage is reliably connected；Vacuum pumping is carried out to bell-jar vacuum drying oven, when its vacuum is better than 3x10‑3During Pa, begin to turn on filament supply；Heater current is added to the rated operational current of filament, simultaneously using high-temperature infrared temperature measurer, filament temperature is monitored, adjusts filament pressure regulator, so that filament temperature is controlled in 2500 ± 100K, shaping time is 10 minutes, after sizing terminates, adjust filament pressure regulator, adjust heater current, filament temperature is made to reach 2650 ± 100K, the scintillation time is 10 seconds；After scintillation terminates, adjust filament pressure regulator, make heater current be reduced to 0.The clean light of filament after present invention sizing, its form and physical dimension are unchanged, and filament in the devices can reliable and stable long-lived operation.The present invention does not need to carry out security evaluation, less demanding to the technical ability of environment and workman.
Description
Technical field
The present invention relates to filament technical field, specifically a kind of method of filament shaping.
Background technology
Filament is the core component of electron tube, it is necessary to have the long-life, high voltage withstanding, and stability is strong, and reliability is high
Performance.The electronic transmitting efficiency of pure tungsten filament is relatively low, but its fusing point is high, and vapour pressure is very low, high mechanical strength, electron emission
Stablize so that pure tungsten filament still obtains and is widely applied.Pure tungsten silk passes through coiling, molds the shape of various needs.In lamp
In the winding process of silk, because the deformation of tungsten filament is so that filament creates larger stress, during welding filament assembly, filament holds
Easily torsional deformation.Existing maturation process is in hydrogen furnace or vacuum drying oven, by heating to the energising of stove silk, makes placement
Filament in the middle of body of heater accepts the heat radiation of body of heater（Hydrogen furnace also has convection current）So that filament heating is to 1400K, to lamp
Silk carries out the heat treatment of low temperature, and main purpose is to remove is filament stress in the fabrication process, reduces filament and was welding
Deformation in journey.Chinese Patent Application No. discloses a kind of high-temperature hydrogen-burning shaping method for filaments for CN201010594368.7, adopts
Use filament low temperature heat-treatment process, most filament deformational stress in the fabrication process can only be removed, and filament is in assembling
During, need the mode of filament laser welding is welded on molybdenum strut, be then fitted on tube core and by machinery
Mode fixation.In this process, filament is understood stress and is produced very big stress.This stress can be in filament normal work
When discharge so that filament is deformed, have a strong impact on the normal work of filament.
Content of the invention
It is an object of the invention to provide a kind of make filament in the devices can reliable and stable long-lived operation filament shaping
Method, with solve the problems, such as in above-mentioned background technology propose.
For achieving the above object, the present invention provides following technical scheme：
A kind of method of filament shaping, comprises the steps of：
1）Prepare：Pure tungsten cathode assembly is placed in bell-jar vacuum drying oven, by equipment the mode of connection filament voltage
Reliability connects；
2）Evacuation：Vacuum pumping is carried out to bell-jar vacuum drying oven, when its vacuum is better than 3x10-3During Pa, start to connect
Logical filament supply；
3）Sizing：Heater current is added to the rated operational current of filament, simultaneously using high-temperature infrared temperature measurer, to filament
Temperature is monitored, and adjusts filament pressure regulator, so that filament temperature is controlled in 2500 ± 100K, and shaping time is 10 minutes,
4）Scintillation：After sizing terminates, adjust filament pressure regulator, adjust heater current, make filament temperature reach 2650 ±
100K, the scintillation time is 10 seconds；
5）After scintillation terminates, adjust filament pressure regulator, make heater current be reduced to 0.
Compared with prior art, the invention has the beneficial effects as follows：The present invention sizing after filament from the appearance, clean light
Bright.Stereotyped filament, its form and physical dimension are unchanged, and filament in the devices can reliable and stable long-lived operation.Use
Vacuum drying oven is shaped it is not necessary to be carried out security evaluation to filament, less demanding to environment, to the skill set requirements of workman not
High.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of method of filament shaping, pure tungsten cathode assembly is placed in bell-jar vacuum drying oven,
By the mode of connection of equipment, filament voltage is reliably connected, vacuum pumping is carried out to vacuum drying oven, when system vacuum is better than
3x10-3During Pa, begin to turn on filament supply, heater current is added to the rated operational current of filament, simultaneously using high-temperature infrared
Temperature measurer, is monitored to filament temperature, adjusts filament pressure regulator, so that filament temperature is controlled in 2500 ± 100K, shaping time
For 10 minutes, after sizing terminates, adjust filament pressure regulator, adjust heater current, make filament temperature reach 2650 ± 100K, time
10 seconds；After scintillation terminates, adjust filament pressure regulator, make heater current be reduced to 0.
Filament is the core component of electron tube, in order to ensure enough electron emission densities, the reality of pure tungsten filament
Operating temperature is controlled at 2400 ~ 2600K.Original filament low temperature heat-treatment process, can only remove most filament in system
Deformational stress during making, and filament, in assembling process, needs for the mode of filament laser welding to be welded on molybdenum strut
On, it is then fitted on tube core and mechanically fixation.In this process, filament is understood stress and is produced very big
Stress.This stress can discharge so that filament is deformed in filament normal work, has a strong impact on the normal of filament
Work.In order that filament assembly is reliable and stable in real work, need filament assembly is preheated, make filament in work
Temperature（2400~2600K）The lower work regular hour, eliminate the stress that produces in coiling, welding process of filament, allow lamp simultaneously
The silk pollution of low melting point of surface attachment and impurity are evaporated at high temperature, thus cleaning of cathode surface it is ensured that filament
High stable in real work and low stain are it is ensured that the normal table of device works.Pure tungsten filament carries out fixed in a vacuum furnace
The process of type technique, its programming rate, setting temperature, temperature retention time, scintillation temperature and time all can quantified controlling, technique is controlled
Property strong, the concordance of properties of product is high.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment only wraps
Containing an independent technical scheme, only for clarity, those skilled in the art should for this narrating mode of description
Using description as an entirety, the technical scheme in each embodiment can also form those skilled in the art through appropriately combined
Understandable other embodiment.
Claims (1)
1. a kind of method of filament shaping is it is characterised in that comprise the steps of：
1）Prepare：Pure tungsten cathode assembly is placed in bell-jar vacuum drying oven, the mode of connection by equipment is reliable filament voltage
Connect；
2）Evacuation：Vacuum pumping is carried out to bell-jar vacuum drying oven, when its vacuum is better than 3x10-3During Pa, begin to turn on lamp
Silk power supply；
3）Sizing：Heater current is added to the rated operational current of filament, simultaneously using high-temperature infrared temperature measurer, to filament temperature
It is monitored, adjusts filament pressure regulator, so that filament temperature is controlled in 2500 ± 100K, shaping time is 10 minutes,
4）Scintillation：After sizing terminates, adjust filament pressure regulator, adjust heater current, make filament temperature reach 2650 ± 100K, dodge
The refining time is 10 seconds；
5）After scintillation terminates, adjust filament pressure regulator, make heater current be reduced to 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510327346.7A CN105047523B (en) | 2015-06-15 | 2015-06-15 | A kind of method of filament shaping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510327346.7A CN105047523B (en) | 2015-06-15 | 2015-06-15 | A kind of method of filament shaping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105047523A CN105047523A (en) | 2015-11-11 |
| CN105047523B true CN105047523B (en) | 2017-03-08 |
Family
ID=54453976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510327346.7A Active CN105047523B (en) | 2015-06-15 | 2015-06-15 | A kind of method of filament shaping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105047523B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1826524A (en) * | 1927-11-10 | 1931-10-06 | Westinghouse Lamp Co | Treatment of metallic filaments |
| BE413156A (en) * | 1935-01-07 | |||
| US2439913A (en) * | 1941-10-28 | 1948-04-20 | Gen Electric | Method of treating coiled tungsten filaments |
| US3285293A (en) * | 1966-01-03 | 1966-11-15 | Sylvania Electric Prod | Filament forming |
| US5072147A (en) * | 1990-05-09 | 1991-12-10 | General Electric Company | Low sag tungsten filament having an elongated lead interlocking grain structure and its use in lamps |
| CN2094801U (en) * | 1990-08-31 | 1992-01-29 | 武进县特种光源厂 | 130v, 250w long service life single end halogen tungsten lamp |
-
2015
- 2015-06-15 CN CN201510327346.7A patent/CN105047523B/en active Active
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| Publication number | Publication date |
|---|---|
| CN105047523A (en) | 2015-11-11 |
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Effective date of registration: 20211220 Address after: 610000 floor 1, building 3, No. 99, Huanghe Road, Xindu street, Xindu District, Chengdu, Sichuan Patentee after: Chengdu kaisaier Technology Co.,Ltd. Address before: No. 99, Huanghe Road, East Industrial Zone, Xindu District, Chengdu, Sichuan 610000 Patentee before: CHENGDU KAISAIER ELECTRONICS Co.,Ltd. |