CN103862047A - Technology for manufacturing molybdenum pole of magnetron - Google Patents
Technology for manufacturing molybdenum pole of magnetron Download PDFInfo
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- CN103862047A CN103862047A CN201410101211.4A CN201410101211A CN103862047A CN 103862047 A CN103862047 A CN 103862047A CN 201410101211 A CN201410101211 A CN 201410101211A CN 103862047 A CN103862047 A CN 103862047A
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- molybdenum
- molybdenum rod
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Abstract
The invention relates to a technology for manufacturing a molybdenum pole of a magnetron. The technology sequentially comprises the following steps: selecting a material, granulating, pressing, sintering, polishing, welding, and inspecting and storing, wherein in the step of selecting the material, molybdenum powder, a molybdenum rod, distilled water, binder and release agent are needed to be prepared; before welding, the end part of the molybdenum rod needs to be subjected to fillet processing, the end face of the top end of the molybdenum rod, subjected to fillet processing, is a round face with the coaxial line with the middle part of the molybdenum rod, and the diameter of the round face is 1/4 to 1/2 that of the middle part of the molybdenum rod. The end part of the molybdenum rod is subjected to fillet processing, the contact area between the molybdenum rod and a shielding cap is reduced, the pressure on the end face of the molybdenum rod is increased, and thus the molybdenum rod is pushed on the shielding cap tightly more effectively; the end face and the side wall of the molybdenum rod are in rounded transition, the molybdenum rod is connected with the shielding cap more closely after the fillet surface of the molybdenum rod is molten in the process that the molybdenum rod is advanced towards the shielding cap, and the drawing force is guaranteed to be standard; the reserved molybdenum rod end face can guarantee the verticality of the molybdenum rod and the shielding cap.
Description
Technical field
The present invention relates to a kind of molybdenum strut production technology of magnetron.
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Background technology
Existing molybdenum strut production method has two kinds.One is to adopt injection moulding integrated molding, this kind of production method needs injection moulding machine, and equipment cost is high, though output is large, but molybdenum strut size is less, required precision is very high, its size is easy to be subject to the factors such as ambient pressure, temperature, humidity to affect, cause the scarce material of molybdenum strut generation, inside to occur the problems such as bubble, therefore in the time of injection mo(u)lding, factor is high to external world, and production difficulty is large; Also having one is also to adopt first to produce shielding cap, again by shielding cap and molybdenum strut welding, this kind of method is applicable to medium-sized and small enterprises, equipment investment is few, and output can satisfy the demands, but because molybdenum rod end is vertical with sidewall, when welding and shielding cap contact area larger, cylinder is difficult for molybdenum strut to push up to shielding cap, therefore can shine into bonding strength inadequate, causes pulling capacity not up to standard.
Summary of the invention
The object of this invention is to provide the molybdenum strut production technology of the magnetron that a kind of production cost is low, precision is high and pulling capacity is up to standard.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of molybdenum strut production technology of magnetron, it comprises the following steps successively: selection, granulation, compacting, sintering, polishing, welding, inspection warehouse-in, described selection need to be ready to molybdenum powder, molybdenum rod, distilled water, binding agent and releasing agent, the diameter of described molybdenum rod is 1.4～1.6mm, length is 5～6cm, and the nickel coating thickness on molybdenum rod is 1.5～2um
Before welding, rounding processing need to be carried out in the end of described molybdenum rod, and the top end face that is finished down the molybdenum rod after fillet is and the disc of molybdenum rod middle part coaxial line that the diameter of this disc is 1/4～1/2 of molybdenum rod middle part diameter;
Optimize, described granulation step comprises
A, molybdenum powder, distilled water, binding agent, releasing agent are mixed by following weight ratio:
The quality of molybdenum powder: the quality of distilled water: the quality of binding agent: the ratio of the quality of releasing agent is 1:3～6:1～4:0.05～0.5,
B, ball milling
The slurries that mix are imported to ball mill, and ball milling filtered after 1～2 hour, filtrate is collected for subsequent use,
C, mist projection granulating
Utilize sponging granulator that filtrate ejection is formed vaporific, make wherein water evaporates obtain molybdenum powder grain to vaporific filtrate through row heating simultaneously,
D, sieve
The molybdenum powder grain obtaining is divided into multiple grades through the different multiple sieves of sieve aperture, takes on request the molybdenum powder grain of different brackets, larger molybdenum powder grain recycles after reclaiming processing,
E, inspection molybdenum powder grain index
The density, flow velocity and the granularity that check molybdenum powder grain, wherein density is 1.6～2g/cm3, and flow velocity is 50g/min, and granularity is 150～250 orders,
F, by for subsequent use qualified molybdenum powder grain warehouse-in;
Described sintering step is that the shielding cap blank suppressing is fitly placed on sintering molybdenum plate, stacked being placed in sintering furnace from the bottom to top, after the logical nitrogen 20min of sealing, heat up, between adjacent two-layer molybdenum plate, utilize porcelain ring interval, the upper surface of every layer of molybdenum plate is covered with alumina powder, described shielding cap blank is placed on powder, described intensification need to heat up stage by stage, first in 5～6 hours, there is normal temperature to be warming up to 600～800 DEG C, be warming up to 1800 DEG C through 7～8 hours again, and keep 2～3 hours, within 7～8 hours, be down to normal temperature by 1800 DEG C finally by crossing.
Optimize, described pressing step is that molybdenum powder grain is added in powder former, and first manually debugging is converted to automatic compacting until grain weight and size after qualified, automatically in pressing process, checks grain weight and size every 1～1.5 hour, obtains shielding cap blank.
Optimize, to be shielding cap that sintering is completed and polishing agent put in the ratio of 1:2～3 polishing machine that is marked with water to described polishing step carries out vibropolish, fully dry after polishing completes, described polishing agent is needle-like and length is 0.8～1.2cm, and diameter is 0.5～1mm.
Optimize, first described welding step adjusts welding machine voltage, electric current and for molybdenum rod being pushed against to the pressure of the cylinder on shielding cap; Again shielding cap and molybdenum rod are put into respectively to the shielding cap feed tank of welding machine and the feed tank of molybdenum rod, first manually debugging, complete after welding, the size of test samples and pulling capacity, after meeting the requirements, be converted to automatic welding, pulling capacity checks size and the pulling capacity of a molybdenum strut every 1～1.5h, more than need reach 20N.
Beneficial effect of the present invention is: the present invention is before to molybdenum rod and shielding cap welding, rounding processing is carried out in the end of molybdenum rod, the contact area of molybdenum rod and shielding cap while having reduced welding, in the situation that cylinder pressure is identical, pressure on molybdenum rod end face increases, and can more effectively molybdenum rod be pushed against on shielding cap; And because this end face and molybdenum rod sidewall are round-corner transition, in the process that makes to advance to shielding cap at molybdenum rod, after the hollows fusing of molybdenum rod, be connected more closely with shielding cap, ensured that pulling capacity is up to standard; The molybdenum rod end face simultaneously retaining can ensure the perpendicularity of molybdenum rod and shielding cap.
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Brief description of the drawings
Accompanying drawing 1 is production procedure schematic diagram of the present invention;
The top view that accompanying drawing 2 is molybdenum rod of the present invention;
The front view that accompanying drawing 3 is molybdenum rod of the present invention;
In accompanying drawing: 1, molybdenum strut; 11, disc; 12, molybdenum rod middle part.
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Detailed description of the invention
Below in conjunction with embodiment shown in the drawings, the present invention is described in detail below.
As shown in Figure 1, the molybdenum strut production technology of magnetron, it comprises the following steps successively:
One, selection
Need to be ready to molybdenum powder, molybdenum rod, distilled water, binding agent and releasing agent, the diameter of molybdenum rod is 1.4～1.6mm, length is 5～6cm, nickel coating thickness on molybdenum rod is 1.5～2um, as shown in Figure 2, rounding processing need to be carried out in the end of molybdenum rod 1, the top end face that is finished down the molybdenum rod after fillet is and the disc 11 of molybdenum rod middle part 12 coaxial lines, the diameter of this disc 11 is 1/4～1/2 of molybdenum rod middle part 12 diameters, in the present embodiment, molybdenum rod 1 diameter is got 1.5mm, and length is 5cm, and the diameter of its disc 11 is 0.5mm.
Two, granulate
A, molybdenum powder, distilled water, binding agent, releasing agent are mixed by following weight ratio:
The quality of molybdenum powder: the quality of distilled water: the quality of binding agent: the ratio of the quality of releasing agent is 1:3～6:1～4:0.05～0.5,
B, ball milling
The slurries that mix are imported to ball mill, and ball milling filtered after 1～2 hour, filtrate is collected for subsequent use,
C, mist projection granulating
Utilize sponging granulator that filtrate ejection is formed vaporific, make wherein water evaporates obtain molybdenum powder grain to vaporific filtrate through row heating simultaneously,
D, sieve
The molybdenum powder grain obtaining is divided into multiple grades through the different multiple sieves of sieve aperture, takes on request the molybdenum powder grain of different brackets, larger molybdenum powder grain recycles after reclaiming processing,
E, inspection molybdenum powder grain index
The density, flow velocity and the granularity that check molybdenum powder grain, wherein density is 1.6～2g/cm3, and flow velocity is 50g/min, and granularity is 150～250 orders,
F, by for subsequent use qualified molybdenum powder grain warehouse-in.
Three, compacting
Molybdenum powder grain is added in powder former, and first manually debugging, is converted to automatic compacting until grain weight and size after qualified, automatically in pressing process, checks grain weight and size every 1～1.5 hour, obtains shielding cap blank.
Four, sintering
The shielding cap blank suppressing is fitly placed on sintering molybdenum plate, stacked being placed in sintering furnace from the bottom to top, after the logical nitrogen 20min of sealing, heat up, between adjacent two-layer molybdenum plate, utilize porcelain ring interval, the upper surface of every layer of molybdenum plate is covered with alumina powder, and shielding cap blank is placed on powder.Intensification need to heat up stage by stage, first in 5～6 hours, has normal temperature to be warming up to 600～800 DEG C, then is warming up to 1800 DEG C through 7～8 hours, and keeps 2～3 hours, within 7～8 hours, is down to normal temperature by 1800 DEG C finally by crossing.
Five, polishing
The shielding cap that sintering is completed and polishing agent are put in the ratio of 1:2～3 polishing machine that is marked with water and are carried out vibropolish, and fully dry after polishing completes, polishing agent is needle-like and length is 0.8～1.2cm, and diameter is 0.5～1mm.
Six, welding
First adjust welding machine voltage, electric current and for molybdenum rod being pushed against to the pressure of the cylinder on shielding cap, cylinder pressure is 40N; Again shielding cap and molybdenum rod are put into respectively to the shielding cap feed tank of welding machine and the feed tank of molybdenum rod, first manually debugging, complete after welding, the size of test samples and pulling capacity, after meeting the requirements, be converted to automatic welding, pulling capacity checks size and the pulling capacity of a molybdenum strut every 1～1.5h, more than need reach 20N.
Seven, inspection warehouse-in
Above-mentioned technique is the method for making the molybdenum strut of top hat formula, as made the molybdenum strut of center cap form, after welding completes by molybdenum rod bending.
Not only production efficiency is high to utilize above-mentioned explained hereafter molybdenum strut, and perpendicularity is good, and pulling capacity is up to standard, and is not subject to such environmental effects, and production difficulty is lower.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. the molybdenum strut production technology of a magnetron, it comprises the following steps successively: selection, granulation, compacting, sintering, polishing, welding, inspection warehouse-in, described selection comprises and is ready to molybdenum powder, molybdenum rod, distilled water, binding agent and releasing agent, the diameter of described molybdenum rod is 1.4～1.6mm, length is 5～6cm, nickel coating thickness on described molybdenum rod is 1.5～2um, it is characterized in that:
Before welding, rounding processing is carried out in the end of described molybdenum rod, the top end face that is finished down the molybdenum rod after fillet is and the disc of molybdenum rod middle part coaxial line that the diameter of this disc is 1/4～1/2 of molybdenum rod middle part diameter;
Described granulation step comprises:
A, molybdenum powder, distilled water, binding agent, releasing agent are mixed by following weight ratio:
The quality of molybdenum powder: the quality of distilled water: the quality of binding agent: the ratio of the quality of releasing agent is 1:3～6:1～4:0.05～0.5,
B, ball milling
The slurries that mix are imported to ball mill, and ball milling filtered after 1～2 hour, filtrate is collected for subsequent use,
C, mist projection granulating
Utilize sponging granulator that filtrate ejection is formed vaporific, make wherein water evaporates obtain molybdenum powder grain to vaporific filtrate through row heating simultaneously,
D, sieve
The molybdenum powder grain obtaining is divided into multiple grades through the different multiple sieves of sieve aperture, takes on request the molybdenum powder grain of different brackets, larger molybdenum powder grain recycles after reclaiming processing,
E, inspection molybdenum powder grain index
The density, flow velocity and the granularity that check molybdenum powder grain, wherein density is 1.6～2g/cm3, and flow velocity is 50g/min, and granularity is 150～250 orders,
F, by for subsequent use qualified molybdenum powder grain warehouse-in;
Described sintering step is that the shielding cap blank suppressing is fitly placed on sintering molybdenum plate, stacked being placed in sintering furnace from the bottom to top, after the logical nitrogen 20min of sealing, heat up, between adjacent two-layer molybdenum plate, utilize porcelain ring interval, the upper surface of every layer of molybdenum plate is covered with alumina powder, described shielding cap blank is placed on powder, described intensification need to heat up stage by stage, first in 5～6 hours, there is normal temperature to be warming up to 600～800 DEG C, be warming up to 1800 DEG C through 7～8 hours again, and keep 2～3 hours, within 7～8 hours, be down to normal temperature by 1800 DEG C finally by crossing.
2. the molybdenum strut production technology of magnetron according to claim 1, it is characterized in that: described pressing step is that molybdenum powder grain is added in powder former, first manually debugging, be converted to automatic compacting until grain weight and size after qualified, automatically in pressing process, every grain weight of inspection in 1～1.5 hour and size, obtain shielding cap blank.
3. the molybdenum strut production technology of magnetron according to claim 1, it is characterized in that: to be shielding cap that sintering is completed and polishing agent put in the ratio of 1:2～3 polishing machine that is marked with water to described polishing step carries out vibropolish, it is fully dry after polishing completes, described polishing agent is needle-like and length is 0.8～1.2cm, and diameter is 0.5～1mm.
4. the molybdenum strut production technology of magnetron according to claim 1, is characterized in that: first described welding step adjusts welding machine voltage, electric current and for molybdenum rod being pushed against to the pressure of the cylinder on shielding cap; Again shielding cap and molybdenum rod are put into respectively to the shielding cap feed tank of welding machine and the feed tank of molybdenum rod, first manually debugging, complete after welding, the size of test samples and pulling capacity, after meeting the requirements, be converted to automatic welding, pulling capacity checks size and the pulling capacity of a molybdenum strut every 1～1.5h, more than need reach 20N.
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| CN201410101211.4A CN103862047B (en) | 2014-03-19 | 2014-03-19 | The molybdenum strut production technology of magnetron |
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| CN201410101211.4A CN103862047B (en) | 2014-03-19 | 2014-03-19 | The molybdenum strut production technology of magnetron |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6091531A (en) * | 1983-10-25 | 1985-05-22 | Matsushita Electronics Corp | Manufacture of cathode supporting structure for magnetron |
| JPH03233827A (en) * | 1990-02-09 | 1991-10-17 | Toshiba Corp | Manufacture of cathode structure of magnetron |
| JPH05159708A (en) * | 1991-12-03 | 1993-06-25 | Hitachi Ltd | Magnetron |
| CN101097825A (en) * | 2006-06-30 | 2008-01-02 | 顾进跃 | Method for producing molybdenum component for magnetron cathode |
| CN101315858A (en) * | 2007-05-28 | 2008-12-03 | 上海富驰高科技有限公司 | Molybdenum strut of permatron and its production method |
| CN201478250U (en) * | 2009-08-25 | 2010-05-19 | 美的集团有限公司 | Magnetron |
-
2014
- 2014-03-19 CN CN201410101211.4A patent/CN103862047B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6091531A (en) * | 1983-10-25 | 1985-05-22 | Matsushita Electronics Corp | Manufacture of cathode supporting structure for magnetron |
| JPH03233827A (en) * | 1990-02-09 | 1991-10-17 | Toshiba Corp | Manufacture of cathode structure of magnetron |
| JPH05159708A (en) * | 1991-12-03 | 1993-06-25 | Hitachi Ltd | Magnetron |
| CN101097825A (en) * | 2006-06-30 | 2008-01-02 | 顾进跃 | Method for producing molybdenum component for magnetron cathode |
| CN101315858A (en) * | 2007-05-28 | 2008-12-03 | 上海富驰高科技有限公司 | Molybdenum strut of permatron and its production method |
| CN201478250U (en) * | 2009-08-25 | 2010-05-19 | 美的集团有限公司 | Magnetron |
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Inventor after: Wang Linfu Inventor before: Li Donghai Inventor before: Xu Jianchun |
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Effective date of registration: 20160114 Address after: 215134, No. 355, Weibei South Road, Weitang Town, Suzhou, Jiangsu, Xiangcheng District Applicant after: SUZHOU HUADONG RUBBER CO., LTD. Address before: Double Bang village in Changshou City Xinzhuang Town Suzhou city Jiangsu province 215562 Applicant before: SUZHOU LIYA METAL PRODUCTS CO., LTD. |
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