CN109742011B - Filament shaping device and filament shaping method - Google Patents
Filament shaping device and filament shaping method Download PDFInfo
- Publication number
- CN109742011B CN109742011B CN201811648435.1A CN201811648435A CN109742011B CN 109742011 B CN109742011 B CN 109742011B CN 201811648435 A CN201811648435 A CN 201811648435A CN 109742011 B CN109742011 B CN 109742011B
- Authority
- CN
- China
- Prior art keywords
- filament
- fixing
- shaping
- conductive
- electrode
- 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.)
- Active
Links
Images
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
The invention discloses a filament shaping device, which comprises a workbench, an electrode, a pre-tightening device, a fixing device and a conductive shaping rod, wherein the electrode is arranged on the workbench; the pre-tightening device comprises a pre-tightening force lock and a pre-tightening force spring; the fixing device comprises a first fixing device and a second fixing device, the first fixing device comprises a first clamping part, a first fixing part and a first bolt, and the second fixing device comprises a second clamping part, a second fixing part and a second bolt; the electrodes comprise a first electrode and a second electrode; the first fixing part is connected with the first clamping part, and the first clamping part is in threaded fit with the first bolt; the first fixing part is movably arranged on the first electrode, the pretightening force is locked on the first electrode, and the pretightening force spring is arranged at the end part of the first fixing part; an electrically conductive profile bar is located in a space defined by the first and second clamp portions. The device can well shape the filament. The invention also discloses a method for shaping the filament by using the filament shaping device.
Description
Technical Field
The invention relates to the technical field of filament shaping. And more particularly, to a filament shaping apparatus and a filament shaping method.
Background
The filament is a core component of an electric vacuum device, and needs to have long service life and high temperature and high pressure resistance. The structure of the filament affects its performance, while the formation directly affects its structural stability and quality.
In the prior art, a common filament shaping method is to place a pure tungsten cathode assembly in a bell jar type vacuum furnace, connect the filament with electricity, and carry out vacuum pumping operation on the bell jar type vacuum furnace, when the vacuum degree is better than 3 multiplied by 103And when Pa, starting to switch on a filament power supply, and adding the filament current to the rated working current of the filament so as to achieve the purpose of shaping. The method has the disadvantages that the whole filament is directly heated by electrifying in the whole shaping process, the heating temperature exceeds 1350 ℃, tungsten is recrystallized, crystal grains lose the original slender shape and become a large blocky structure, the toughness is reduced, the lead of the filament is easy to break, the subsequent processing technology is influenced, the machinability is poor, and the yield is low.
Therefore, it is necessary to provide a new filament shaping device and a new filament shaping method to solve the above existing technical problems.
Disclosure of Invention
The first purpose of the invention is to provide a filament shaping device, in which a pre-tightening device is arranged, so that a conductive shaping rod is in a tensioned and straightened state in the filament shaping process, and the filament is prevented from deforming due to expansion, elongation and downward bending deformation in the heating process, and thus, the filament obtained through shaping has a uniform and stable structure and high yield.
The second objective of the present invention is to provide a method for shaping a filament, which has a high yield of shaped filaments and a more uniform and stable filament structure.
In order to achieve the first purpose, the invention adopts the following technical scheme:
the filament shaping device comprises a workbench, an electrode, a pre-tightening device, a fixing device and a conductive shaping rod;
the pre-tightening device comprises a pre-tightening force lock and a pre-tightening force spring;
the fixing device comprises a first fixing device and a second fixing device, the first fixing device comprises a first clamping part, a first fixing part and a first bolt, and the second fixing device comprises a second clamping part, a second fixing part and a second bolt;
the electrodes comprise a first electrode and a second electrode;
wherein the content of the first and second substances,
the first electrode and the second electrode are arranged on the workbench;
the first fixing part is connected with the first clamping part, and the first clamping part is in threaded fit with the first bolt;
the first fixing part is movably arranged on the first electrode, the pretightening force is locked on the first electrode and used for fixing or loosening the first fixing part, and the pretightening force spring is arranged at the end part of the first fixing part;
the second fixing part is connected with the second clamping part, and the second clamping part is in threaded fit with the second bolt;
the second fixing part is arranged on the second electrode;
the conductive profile bar is located in a space defined by the first and second clamping portions.
Preferably, the first electrode and the second electrode are a positive electrode and a negative electrode, respectively.
Preferably, the conductive shaping rod is made of tungsten.
Preferably, the filament shaping device further comprises a cover body, the cover body is arranged on the workbench, and the electrode, the pre-tightening device, the fixing device and the conductive shaping rod are located in a space defined by the cover body and the workbench.
Preferably, the filament shaping device further comprises a cover body pressing device, and the cover body pressing device is arranged on the workbench.
Preferably, the filament shaping device further comprises a vacuum pumping device, and the vacuum pumping device forms a vacuum space in the space defined by the cover body and the workbench.
In order to achieve the second purpose, the invention adopts the following technical scheme:
a filament shaping method comprises the following steps:
sleeving the filament on the conductive shaping rod;
applying a pretightening force towards the direction of the conductive shaping rod to the first fixing part to enable the pretightening force spring to be in a compressed state, locking a pretightening force lock, and fixing two ends of the conductive shaping rod on the first clamping part and the second clamping part respectively;
removing the pretightening force and loosening the pretightening force lock to enable the conductive shaping rod to be in a straightening state;
and under the hydrogen atmosphere, the conductive shaping rod is electrically heated, so that the filament is shaped.
Preferably, the filament is arranged in a sliding fit with the conductive shaping rod.
Preferably, the conductive shaping rod is electrically heated by a direct current constant current source.
Preferably, the filament and the conductive shaping rod are made of the same material, and more preferably, a tungsten wire.
The invention has the following beneficial effects:
according to one object of the invention, the filament shaping device provided by the invention is provided with the pre-tightening device for pre-tightening the first fixing device, so that the conductive shaping rod is in a tensioned and straightened state in the filament shaping process, and the filament is prevented from deforming due to expansion and elongation and downward bending deformation in the heating process. The arrangement of the conductive shaping rod ensures that the temperature of the filament pins is lower than the recrystallization temperature of the filament pins in the process of shaping the filament by the filament shaping device, so that the filament pins have good toughness and good machinability, and the filament obtained by shaping has uniform and stable structure and high yield. According to the second object of the invention, in the filament shaping method provided by the invention, the fixed conductive shaping rod is in a tensioned and stretched state by applying tension to the fixed conductive shaping rod, so that the effects of preventing the conductive shaping rod from expanding and extending in the heating process and preventing the filament from deforming due to downward bending deformation are achieved, the filament is prevented from deforming and inter-turn short circuit in the working process, and the reliability of the filament in devices is improved. The filament and the conductive shaping rod are further preferably arranged in a sliding fit mode, so that the heat transfer efficiency between the conductive shaping rod and the filament can be improved, the temperature of the filament pins is lower than the recrystallization temperature in the shaping process, and the pin tungsten filament is prevented from being recrystallized when heated at high temperature.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a filament shaping apparatus in an embodiment of the present invention.
Fig. 2 shows a schematic diagram of the filament sleeved on the conductive shaping rod in the embodiment of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In one aspect, an embodiment of the present invention provides a filament shaping apparatus, as shown in fig. 1, the filament shaping apparatus includes a worktable 1, an electrode, a pre-tightening device, a fixing device, and a conductive shaping rod 5;
the pre-tightening device comprises a pre-tightening force lock 41 and a pre-tightening force spring 42;
the fixing means includes a first fixing means including a first fixing portion 31, a first clamping portion 32, and a first bolt 33, and a second fixing means including a second fixing portion 31 ', a second clamping portion 32 ', and a second bolt 33 ';
the electrodes include a first electrode 21 and a second electrode 22;
wherein the content of the first and second substances,
the first electrode 21 and the second electrode 22 are arranged on the workbench 1;
the first fixing portion 31 is connected to the first clamping portion 32, and the first clamping portion 32 is threadedly engaged with a first bolt 33;
the first fixing part 31 is movably arranged on the first electrode 21, the pre-tightening force lock 41 is arranged on the first electrode 21 and used for fixing or loosening the first fixing part 31, and the pre-tightening force spring 42 is arranged at the end part of the first fixing part 31;
the second fixing portion 31 'is connected to the second clamping portion 32', and the second clamping portion 32 'is screw-engaged with a second bolt 33';
the second fixing portion 31' is disposed on the second electrode 22;
the conductive profile bar 5 is located in a space defined by the first and second clamping portions 32 and 32'.
It should be noted that, in the present embodiment, the first fixing portion 31 is movably disposed on the first electrode 21, which means that the first fixing portion 31 can move in a direction perpendicular to the first electrode 21, and the pretension lock 41 is locked, so that the first fixing portion 31 can be fixed. The pretightening force spring 42 is disposed at an end of the first fixing portion 31 away from the first clamping portion 32, and is used for applying a force to the first fixing portion 31 through the pointer type push-pull force gauge 6 to depart from the conductive shaped rod when the conductive shaped rod 5 is fixed. When the filament shaping device works, the arrangement of the pre-tightening device can enable the conductive shaping rod to be in a tensioned and straight state, and prevent the conductive shaping rod from expanding and extending in the heating process and causing the filament to deform due to downward bending deformation, so that the filament is uniform in shape and good in machinability.
In this embodiment, the first fixing device and the second fixing device are both conductive devices, and the material may be a high-voltage-resistant conductive material with a certain strength, which is conventional in the art. The fixing device can realize that the conductive shaping rod is electrically connected with the electrode through the fixing device in a power-on state. In addition, the first electrode 21 and the second electrode 22 are respectively a positive electrode and a negative electrode, so that normal flow of current is achieved.
The conductive shaping rod is mainly used for providing supporting force and heating when the lamp filament is shaped. The material may be a conductive material with a certain strength. In a preferred example, the conductive shaped rod 5 is made of tungsten. Because the filament is generally a tungsten filament, when the material of the conductive shaping rod is the same as that of the filament, the deformation of the filament caused by the difference of the thermal expansion coefficients of the two materials in the heating and temperature rising process can be effectively avoided.
In a preferred example, the filament shaping device further includes a cover body disposed on the worktable, and the electrode, the pre-tightening device, the fixing device and the conductive shaping rod 5 are located in a space defined by the cover body and the worktable. The cover body can be a quartz bell jar, a stainless steel bell jar and the like.
Further, in a further preferred example, the filament shaping device further comprises a cover body pressing device, and the cover body pressing device is arranged on the workbench. The cover body pressing device is used for fixedly pressing the cover body on the workbench.
In a preferred example, the filament shaping apparatus further includes a vacuum evacuation apparatus that forms a space defined by the cover and the stage into a vacuum space.
In addition, it can be understood that the filament shaping apparatus in this embodiment further includes other components in the conventional filament shaping apparatus, such as an electrical appliance control system with a control panel, an air vent with an air vent valve, and the like, which are not described herein again.
In another aspect, a further embodiment of the present invention provides a method for filament shaping, which uses the filament shaping apparatus in the above embodiment, and includes the following steps:
sleeving the filament 7 on the conductive shaping rod 5 as shown in fig. 2;
applying a pretightening force towards the direction of the conductive shaping rod 5 to the first fixing part 31, so that the pretightening force spring 42 is in a compressed state, locking the pretightening force lock 41, and fixing two ends of the conductive shaping rod 5 on the first clamping part 32 and the second clamping part 32' respectively;
removing the pretightening force and loosening the pretightening force lock 41 to ensure that the conductive shaping rod 5 is in a straightening state;
and under the hydrogen atmosphere, the conductive shaping rod 5 is electrically heated, so that the filament 7 is shaped.
In the method, after the pre-tightening force is removed, the pre-tightening force spring in a compressed state is in an elastic recovery state, so that the fixed conductive shaping rod is exerted with a pulling force and is in a tensioned and stretched state, and the function of preventing the conductive shaping rod from expanding and extending in the heating process and causing the deformation of the filament due to downward bending deformation is further realized. The obtained filament has uniform structure. In addition, the oxide layer on the surface of the filament can be effectively removed by heating and shaping in the hydrogen atmosphere.
In a preferred example, the filament 7 and the conductive shaping rod 5 are made of the same material, so that the filament deformation caused by the difference of the thermal expansion coefficients of the two materials in the heating and temperature rising process can be effectively avoided. The material is preferably tungsten wire.
In a preferred example, the filament 7 and the conductive shaping rod 5 are arranged in a sliding fit manner, so that the heat transfer efficiency between the filament and the conductive shaping rod can be improved, and the filament is prevented from being recrystallized due to overhigh temperature at the pin part of the filament when heated at high temperature, so that the toughness is reduced.
In a preferred example, the conductive styling bars 5 are electrically heated using a dc constant current source. The heating mode is that, applys the direct current constant current source to between two electrodes, and the electric current further flows to electrically conductive setting pole through fixing device, and electrically conductive setting pole is heat energy with electric energy conversion to the realization is to electrically conductive setting pole's heating.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (9)
1. The method for shaping the filament by the filament shaping device is characterized in that the filament shaping device comprises a workbench, an electrode, a pre-tightening device, a fixing device and a conductive shaping rod;
the pre-tightening device comprises a pre-tightening force lock and a pre-tightening force spring;
the fixing device comprises a first fixing device and a second fixing device, the first fixing device comprises a first clamping part, a first fixing part and a first bolt, and the second fixing device comprises a second clamping part, a second fixing part and a second bolt;
the electrodes comprise a first electrode and a second electrode;
wherein the content of the first and second substances,
the first electrode and the second electrode are arranged on the workbench;
the first fixing part is connected with the first clamping part, and the first clamping part is in threaded fit with the first bolt;
the first fixing part is movably arranged on the first electrode, the pretightening force is locked on the first electrode and used for fixing or loosening the first fixing part, and the pretightening force spring is arranged at the end part of the first fixing part;
the second fixing part is connected with the second clamping part, and the second clamping part is in threaded fit with the second bolt;
the second fixing part is arranged on the second electrode;
the conductive shaping rod is positioned in a space defined by the first clamping part and the second clamping part;
the method comprises the following steps:
sleeving the filament on the conductive shaping rod;
applying a pretightening force towards the direction of the conductive shaping rod to the first fixing part to enable the pretightening force spring to be in a compressed state, locking a pretightening force lock, and fixing two ends of the conductive shaping rod on the first clamping part and the second clamping part respectively;
removing the pretightening force and loosening the pretightening force lock to enable the conductive shaping rod to be in a straightening state;
electrically heating the conductive shaping rod in a hydrogen atmosphere so as to realize the shaping of the filament;
wherein, a direct current constant current source is adopted to electrically heat the conductive shaping rod.
2. The method of claim 1, wherein the first and second electrodes are positive and negative electrodes, respectively.
3. The method of claim 1, wherein the conductive shaped bar is tungsten.
4. The method of claim 1, wherein the filament shaping device further comprises a cover disposed on the worktable, and the electrode, the pre-tightening device, the fixing device and the conductive shaping rod are located in a space defined by the cover and the worktable.
5. The method of claim 4, wherein the filament shaping apparatus further comprises a shroud hold-down apparatus disposed on the platen.
6. The method of claim 4, wherein the filament sizing device further comprises a vacuum evacuation device that forms a space defined by the enclosure and the table as a vacuum space.
7. The method of claim 1, wherein the filament is slip-fit to the conductive sizing bar.
8. The method of claim 1, wherein the filament and the electrically conductive shaped rod are the same material.
9. The method of claim 8, wherein the filament and the conductive shaped bar are made of tungsten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648435.1A CN109742011B (en) | 2018-12-30 | 2018-12-30 | Filament shaping device and filament shaping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648435.1A CN109742011B (en) | 2018-12-30 | 2018-12-30 | Filament shaping device and filament shaping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109742011A CN109742011A (en) | 2019-05-10 |
| CN109742011B true CN109742011B (en) | 2021-07-06 |
Family
ID=66362921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811648435.1A Active CN109742011B (en) | 2018-12-30 | 2018-12-30 | Filament shaping device and filament shaping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109742011B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2078046U (en) * | 1990-11-01 | 1991-05-29 | 复旦大学 | Horizontal type shaped device for lamp filament of halogen-tungsten |
| JPH04303557A (en) * | 1991-03-30 | 1992-10-27 | Toshiba Lighting & Technol Corp | Filament coil molding device |
| US6679534B2 (en) * | 2002-06-03 | 2004-01-20 | Gene H. Schulte | Device for inserting and removing lighting tubes |
| JP5108282B2 (en) * | 2006-11-29 | 2012-12-26 | 高周波熱錬株式会社 | Metal wire heating device |
| CN101716963B (en) * | 2009-11-16 | 2012-11-28 | 济南吉利汽车有限公司 | Device and method for loading rod pieces in independent suspension system of vehicle |
| CN102582373B (en) * | 2011-01-06 | 2016-08-03 | 周立新 | The Fast Installation of the auxiliary tyre of motor vehicle and disassembling system |
| CN202549797U (en) * | 2011-11-24 | 2012-11-21 | 天津兰普里克照明电器有限公司 | Filament shaping and purifying apparatus |
| CN102427017B (en) * | 2011-11-24 | 2016-05-25 | 天津兰普里克照明电器有限公司 | Filament shaping purifier and use its shape purify method |
| KR101345531B1 (en) * | 2012-02-15 | 2013-12-26 | 주식회사 새한텅스텐 | Apparatus for joining sleeve of filament |
| CN103469872A (en) * | 2013-09-10 | 2013-12-25 | 西北农林科技大学 | Mechanical flushing squatting pan |
| CN108505019B (en) * | 2018-06-12 | 2024-02-09 | 深圳先进技术研究院 | Hot wire clamp, hot wire deposition equipment, application of hot wire clamp and hot wire deposition equipment and appliance obtained by using hot wire clamp |
-
2018
- 2018-12-30 CN CN201811648435.1A patent/CN109742011B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109742011A (en) | 2019-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108456874B (en) | Graphite boat electrode introducing device of tubular PECVD (plasma enhanced chemical vapor deposition) equipment | |
| CN108405713A (en) | A kind of sheet metal pulse current assists micro- hole punched device and method | |
| CN109742011B (en) | Filament shaping device and filament shaping method | |
| CN2922115Y (en) | Long-life ion source heating electronic gun filament fixing device | |
| CN211966560U (en) | Graphite boat locating pin assists installation device | |
| CN215644383U (en) | Radio frequency electrode feed-in device | |
| CN108448488A (en) | 840kN grades of tension resistant four cross-arm side insulator replacement tools and method | |
| CN2922114Y (en) | Filament lead-out rod isolating structure | |
| CN1970183A (en) | Magnesium alloy extrusion product straightening method and tension straightening machine used therefor | |
| CN210866110U (en) | Cathode component and degassing circuit of X-ray tube | |
| CN204905159U (en) | Temperature controller with adjustable it is novel | |
| CN209227087U (en) | A kind of micro-arc oxidation device | |
| CN113517168A (en) | Radio frequency electrode feed-in device | |
| WO2008082399A1 (en) | Heating element for a fuel cell | |
| CN105441988A (en) | Furnace starting method for preparing simple substance metal or alloy in molten salt electrolysis mode | |
| CN107454683A (en) | A kind of electrical connection device of the curing molding equipment of PTC heater part | |
| CN219066705U (en) | Silver contact structure of temperature controller switch assembly | |
| CN215964023U (en) | Heating and crushing device for glass shell of display | |
| CN100494508C (en) | Mother link arrangement for starting mixture baking in an aluminium cell | |
| CN201305655Y (en) | Connecting devices of polycrystalline silicon hydrogen reduction furnace silicon core rods and graphite clamping heads | |
| CN217486666U (en) | Ceramic heating rod | |
| CN213847057U (en) | Bolt dismouting heating device | |
| CN212082039U (en) | Electric furnace capable of quickly changing electric furnace wire | |
| CN204867914U (en) | Welding clamp | |
| CN2514962Y (en) | Electrode holders |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230625 Address after: No. 1918, 16th floor, scientific research building, No. 13 Jiuxianqiao Road, Chaoyang District, Beijing 100015 Patentee after: CETC Ruishi Technology (Beijing) Co.,Ltd. Address before: 13 Jiuxianqiao Road, Chaoyang District, Beijing 100015 Patentee before: BEIJING VACUUM ELECTONICS Research Institute |