CN108620592A - A method of preparing tungsten copper capillary - Google Patents
A method of preparing tungsten copper capillary Download PDFInfo
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- CN108620592A CN108620592A CN201810414424.0A CN201810414424A CN108620592A CN 108620592 A CN108620592 A CN 108620592A CN 201810414424 A CN201810414424 A CN 201810414424A CN 108620592 A CN108620592 A CN 108620592A
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- copper
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- 238000000034 method Methods 0.000 title claims abstract description 113
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 239000000843 powder Substances 0.000 claims abstract description 203
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 175
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 238000005245 sintering Methods 0.000 claims abstract description 44
- 238000001125 extrusion Methods 0.000 claims abstract description 41
- 238000000465 moulding Methods 0.000 claims abstract description 36
- 238000001764 infiltration Methods 0.000 claims abstract description 30
- 230000008595 infiltration Effects 0.000 claims abstract description 30
- 238000012805 post-processing Methods 0.000 claims abstract description 22
- 239000011148 porous material Substances 0.000 claims abstract description 18
- 238000007723 die pressing method Methods 0.000 claims abstract description 14
- 230000005855 radiation Effects 0.000 claims abstract description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 38
- 238000004826 seaming Methods 0.000 claims description 30
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 241000606750 Actinobacillus Species 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 238000009704 powder extrusion Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000009700 powder processing Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000010949 copper Substances 0.000 description 21
- 229910052802 copper Inorganic materials 0.000 description 19
- 239000000463 material Substances 0.000 description 9
- 230000006698 induction Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- OXVUUZZHYVQASQ-UHFFFAOYSA-N copper tungsten Chemical class [W][Cu][W] OXVUUZZHYVQASQ-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 210000004379 membrane Anatomy 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 210000003516 pericardium Anatomy 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F2005/103—Cavity made by removal of insert
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of methods preparing tungsten copper capillary, suitable for the common infiltration method of tungsten copper powder metallurgical technology and lqiuid phase sintering method, basic technological process includes prepared by powder, powder is molded, de- forming agent, sintering and post-processing, during powder is molding, it is based respectively on die pressing, method of radiation or extrusion, at powder center, merging copper wire carries out occupy-place, it is sintered after powder molding, in sintering process, powder forms tungsten copper bar, copper wire infiltration diffuses to tungsten copper bar ontology, and it is centrally formed pore in the tungsten copper bar ontology, high length-diameter ratio requirement can be met, effectively reduce production cost, shorten with short production cycle, improve yields.
Description
Technical field
The present invention relates to tungsten copper capillary processing technique field, especially a kind of method preparing tungsten copper capillary.
Background technology
A kind of two phase structure puppet that it is base that tungsten-copper alloy (WCu), which is with wolfram element (W), is formed based on copper (Cu) is closed
Gold is a kind of metallic composite.Tungsten-copper alloy combines the advantages of tungsten and copper, and high temperature resistant, intensity height, resistance to electric arc are burnt
Erosion, density are big；It is conductive, heat conductivility is moderate, linear expansion coefficient is moderate, be widely used in military heat-resisting material, electrical contact and
Electric machining material, microelectronic material.Due to the excellent performance of tungsten-copper alloy, tungsten copper capillary is also just attempted for communication industry
Fiber stub (Optical Fiber Ferrule), the tungsten copper content of typical fiber stub is：W85%Cu15%, length
The +/- 3mm of tolerance is required for 5mm, outer diameter 1mm, centre bore 0.2mm requires the +/- 1mm of tolerance, in addition to ginsengs such as concentricity, straightness
Number, which also has, is strict with.
Metallic copper and tungsten physical characteristic differ greatly, and are generally produced using PM technique, powder metallurgy process
Tungsten-copper alloy is prepared, common basic methods have lqiuid phase sintering method or infiltration method, the general technology flow difference of the two methods
As shown in Figure 1 and Figure 2, as shown in Figure 1, lqiuid phase sintering method is will to be prepared into after a certain proportion of class composite W-Cu powder hybrid shaping agent
Tungsten-copper alloy powder after being molded to pressed by powder, is sintered at a high temperature of between tungsten copper fusing point and tungsten-copper alloy is made, then again
Post-processing finishing is carried out to alloy.As shown in Fig. 2, infiltration method be will be mixed in tungsten powder into binder (such as stearic acid, paraffin,
Play lubrication and cementation) or a small amount of induction copper powder be prepared into tungsten powder body and be sintered to tungsten bone at high temperature after pressed by powder molding
Frame penetrates into the gap of W skeleton after then at a lower temperature melting copper and tungsten-copper alloy is made, then again to alloy into
Row post-processing finishing.
Prepare tungsten copper capillary when, if using the relatively large tungsten-copper alloy pipe of diameter is first prepared, then carry out cold
Or hot pull is to required size, due to the poor ductility of high tungsten Tungsten-copper Composites, difficult when leading to cold or hot pull, ratio of briquetting is not
It is high；If using solid tungsten copper alloy bar, the method for reprocessing big L/D ratio center micropore, due to existing various is first prepared
The methods of the method such as electric spark, miniature drill of processing micropore is difficult to meet the requirements such as draw ratio, minimum-value aperture, machining accuracy, electricity
There are disadvantage, above-mentioned sides in yield rate, production cost, production cycle, equipment investment etc. for the methods of solution, laser, electron beam
Method is difficult to realize the preferable balance of quality, efficiency and cost.
Invention content
The applicant is directed to the disadvantage in above-mentioned existing production technology, provides a kind of method preparing tungsten copper capillary, from
And reach the quality for the centre bore for improving tungsten copper capillary, precision is promoted, is saved material, cost is reduced, shortens the production cycle
Purpose.
The technical solution adopted in the present invention is as follows：
A method of tungsten copper capillary being prepared, technological process is：Tungsten-copper alloy powder prepares, powder molding, takes off molding
Agent, sintering and post-processing, in the powder forming process, at powder center, merging copper wire carries out occupy-place, is carried out after powder molding
Sintering, in sintering process, powder forms tungsten copper bar, and copper wire infiltration diffuses to tungsten copper bar ontology, and in the tungsten copper stick
Material body central forms pore；
Powder molding uses die pressing, the apparatus structure that die pressing uses for：Including the first mold, first mould
Tool is in cylindrical structure, and middle part is provided with notch, has the reach through hole that may pass through copper wire and the first demoulding in the bottom centre of notch
The side wall surface upper and lower part of centre hole, cylindrical structure is not provided with the first cut-out tool bore；In the notch of first mold bottom with
Push-down head, seaming chuck are placed in top respectively, and the internal face of the push-down head, seaming chuck and the first mold, which is formed, places the first powder
The cavity of body, the push-down head, seaming chuck center have the reach through hole that may pass through copper wire, opened with reach through hole vertical direction
There is copper wire to cut off hole, the copper wire cut-out hole is corresponding with the first cut-out tool bore；For the seaming chuck at T-type structure, the upper end is straight
Diameter is more than the outer diameter of the first mold；
Its concrete operation step is as follows：
The first step prepares powder：Tungsten copper powder is mixed, forming agent is added, the first powder is made；
Second step, fixing mould：Releasing agent is coated in the internal face of the first die slot, and is secured it on mould bases；
Third step is put into pressure head：It is put into push-down head and seaming chuck in the first die slot, and is pasted with the first mould inner wall
It closes, the seaming chuck upper end is higher than the cast gate of the first mold；
4th step, merging copper wire：First copper wire is penetrated to the center break-through of seaming chuck, push-down head and the first mold successively
Hole, and the first mold exterior is stretched out, the both ends of the first copper wire apply tensile force by upper grip, lower collet respectively and are fixed；
5th step, compacting powder：Promoted seaming chuck make its lower end be higher than the first mould upstream cast gate, by the first powder from
It is injected in first mould gate, pushes seaming chuck, the powder in the first mold compressed, and keep pressure 10-30 minutes；
6th step, pressing molding：The 5th step is repeated, until the first powder weight and height reach and want in the first cavity body of mould
It asks, the first cut-out tool bore keeps flushing and being connected to copper wire cut-out hole at this time；
7th step, cut-out copper wire：Cutoff tool is inserted into respectively in the first cut-out tool bore, and is deeply cut off to copper wire
Hole cuts off the first copper wire, then extracts cutoff tool out；
8th step, demoulding：Seaming chuck is taken out, ejection piece is installed in the first demoulding thimble hole, by push-down head and the first powder
Body ejects, that is, obtains the powder blank that center carries the first copper wire；
9th step, sintering：The powder blank obtained in 8th step is subjected to removing forming agent processing, and molten between tungsten copper
It being sintered at a high temperature of between point, powder blank forms tungsten copper bar, while the first copper wire infiltration is into tungsten copper bar ontology, and
The tungsten copper bar ontology is centrally formed center pore；
Tenth step, post-processing：Outer diameter and center pore to tungsten copper bar carry out machining.
Its further technical solution is：
First mold is using radial two points of mode structures.
A method of tungsten copper capillary being prepared, technological process is：Tungsten-copper alloy powder prepares, powder molding, takes off molding
Agent, sintering and post-processing, in the powder forming process, at powder center, merging copper wire carries out occupy-place, is carried out after powder molding
Sintering, in sintering process, powder forms tungsten copper bar, and copper wire infiltration diffuses to tungsten copper bar ontology, and in the tungsten copper stick
Material body central forms pore；
Powder molding uses method of radiation, the apparatus structure that method of radiation uses for：Including the second mold, second mould
Tool is in cylindrical structure, and middle part is provided with notch, has the reach through hole that may pass through copper wire and the second demoulding in the bottom centre of notch
Centre hole is provided with the second cut-out tool bore on the wall surface of cylindrical structure side；Right mould head, institute are placed in bottom in the notch of second mold
It states right mould head center and is provided with the reach through hole that may pass through copper wire, be provided with the second cut-out hole with reach through hole vertical direction, described second cuts
Disconnected hole is corresponding with the second cut-out tool bore；The top end surface of second die slot connects left mould head, the left mould head Cheng Yuan
Column structure, middle part are provided with centrosymmetric multiple circular holes, and the cylindrical structure, which is provided centrally with, may pass through wearing for copper wire
Through-hole is provided with third with reach through hole vertical direction and cuts off hole；The left mould head connects gate plate, and the gate plate is at cylinder knot
Structure, middle part are provided with groove, and the bottom portion of groove is provided with running channel corresponding with the circular hole, and with the second mould inner wall face and the right side
Die head constitutes the cavity for placing the second powder.
Its concrete operation step is as follows：
The first step prepares powder：Tungsten copper powder is mixed, forming agent is added, the second powder is made；
Second step, fixing mould：Releasing agent is coated in the second mold inner cylinder face, and secures it to mould bases；
Third step is put into die head：It is put into right mould head in the second die slot, left mould head is connected on the left of the second mold,
Releasing agent is coated in left mould head inner wall；
4th step, merging copper wire：The second upset copper wire of one end is penetrated successively in left mould head, right mould head and the second mold
Heart reach through hole, and stretch out the second mold exterior and the reach through hole clamping of upset one end and left mould head is fixed into the second bronze medal with fixture block
The external part of silk, and apply tension to ensure its tensioning；
5th step, installation gate plate：Gate plate is connected on the left of left mould head；
6th step injects powder：The exit wound of bullet of connection ejaculator on the left of the gate plate starts ejaculator, hopper conveying
Second powder to screw rod, motor is projected the second powder by transmission system drives screw rod, is filled out via the circular hole running channel of gate plate
It is charged in the second mold, keeps pressure 10-30 minutes；
7th step, cut-out copper wire：Copper wire cutoff tool is inserted into second cut-out hole, third cut-out hole respectively, by second
Copper wire is cut off, and takes out copper wire cutoff tool；
8th step, demoulding：Remove gate plate, left mould head, the second demoulding thimble hole install ejection piece, eject right mould head and
Second powder obtains the powder blank that center carries copper wire；
9th step, powder processing：The machining of outer shape is carried out to the powder blank that the 8th step obtains；
Tenth step carries out de- forming agent processing to the powder blank that the 9th step processes, and is then sintered, post-processes,
The sintering, post-processing are identical as the operation of die pressing corresponding steps.
Its further technical solution is：
Second mold is using radial two points of mode structures.
The left mould head is provided with a pair of or two pairs of circular holes being arranged symmetrically at cylindrical structure, middle part.
A method of tungsten copper capillary being prepared, technological process is：Tungsten-copper alloy powder prepares, powder molding, takes off molding
Agent, sintering and post-processing, in powder forming process, at powder center, merging copper wire carries out occupy-place, in the subsequent sintering process,
Powder forms tungsten copper bar, and copper wire infiltration forms pore into tungsten copper bar ontology, and in the tungsten copper bar body central；
Powder molding uses extrusion molding, the device that extrusion molding uses for：Including mould cylinder, the both ends of mould cylinder respectively with mould
Tube end plate and the connection of extrusion die mouth, the mould tube end plate, mould cylinder and extrusion die mouth constitute the cavity for placing third powder, further include
The draft gear of the actinobacillus device and traction copper wire movement of unwrapping wire is carried out to copper wire；It is provided with feeding mouth in the mould cylinder side wall surface,
Mould tube end plate center is provided with the reach through hole that may pass through copper wire, and cone tank, the cone tank are formed inside the extrusion die mouth
Mouth small end face is extended with straight-through notch；
Its concrete operation step is as follows：
The first step prepares powder：Tungsten copper powder is mixed, forming agent is added, third powder is made；
Second step, fixing mould：Mould cylinder is fixed to mould bases, mould tube end plate is connected on the left of mould cylinder, connection is crowded on the right side of mould cylinder
Pressing mold mouth；
Third step, merging copper wire：The reach through hole that third copper wire is penetrated to mould tube end plate center successively with actinobacillus device, through mould
Cylinder is internal, stretches out the outside of extrusion die mouth, passes through draft gear；
4th step squeezes powder：It is squeezed into mould cylinder from feeding mouth by third powder pressing, and by its slave extrusion die at the uniform velocity
It is squeezed out in mouth, the extruding through extrusion die mouth conical rebate and straight-through notch, the third powder diameter squeezed out from extrusion die mouth becomes
It is small, at the same by draft gear draw third copper wire, with actinobacillus device coordinate control third copper wire tension and speed, make its with
Third powder extrusion molding speed is identical；Bracket is set below the third powder being extruded, and the bracket is semi-cylindrical shaped knot
The internal diameter of structure, the semi-cylindrical shaped structure is more than third powder diameter, and holds up third powder from downside；The semi-cylindrical shaped knot
Stomata is provided on structure, gas is passed through from stomata, and one layer of gas is formed between the inner wall and third powder of semi-cylindrical shaped structure
Film mitigates powder deformation to reduce the friction of third powder and tray chamber.
5th step, cut-out powder：When the third powder of extrusion reaches requirement length, stop powder extrusion and copper wire traction,
The third powder of extrusion and the segmentation of in-between third copper wire are cut into powder blank；
6th step after powder blank is carried out de- forming agent processing, is sintered and post-processes, the sintering, rear place
Reason is identical as the operation of die pressing corresponding steps；
7th step manually pulls out the third copper wire after cut-out, resets in draft gear, repeats the 5th step, the
Six steps, it is sustainable to process the tungsten copper capillary met the requirements.
A kind of method preparing tungsten copper capillary, technological process are：Tungsten powder body prepares, powder molding, takes off molding
Agent, pre-sintering, sintering, infiltration and post-processing, the tungsten powder body is prepared as tungsten powder mixed-forming agent and tungsten powder body is made, in tungsten powder body
In forming process, powder center merging copper wire carry out occupy-place, in sintering process, powder formed W skeleton, copper wire infiltration into
W skeleton, and it is centrally formed pore in the W skeleton；The infiltration is made in the gap for penetrated into after melting copper W skeleton
At tungsten-copper alloy.
A kind of method preparing tungsten copper capillary, technological process are：Tungsten powder body is prepared, powder molding, sintering, is melted
It oozes and post-processes, the tungsten powder body is prepared as tungsten powder mixing induction copper powder and tungsten powder body is made, during tungsten powder is body formed, in powder
Body center is placed in copper wire and carries out occupy-place, and in sintering process, powder forms W skeleton, and copper wire infiltration is into W skeleton, and described
W skeleton is centrally formed pore；The infiltration is that tungsten-copper alloy is made in the gap for penetrated into after melting copper W skeleton.
Beneficial effects of the present invention are as follows：
The present invention is by during the pressed by powder of tungsten copper powder metallurgical technology, using being placed in copper wire occupy-place in powder,
The method of self-assembling formation high quality centre bore after sintering can meet compared with high length-diameter ratio requirement, and production cost is small, with short production cycle,
Yields is high.
The present invention also has the following advantages that：
1. infiltration method, sintering process suitable for powder metallurgical technique, i.e., prepare powder and the process of blank sintering does not have
Particular/special requirement when using infiltration method, carries out infiltration of copper, without changing metallurgical technology stream to tungsten ontology skeleton again after the hole forming of center
The sequence and step of journey, it is easy to operate.
2. suitable for the molding method of powder of die pressing, method of radiation or extrusion, in powder forming process, demoulding side
Formula is suitable for radially, axially pattern, can meet the requirement of different draw ratios.
3. with the difference of tungsten, copper fusing point, copper wire is placed in occupy-place in powder, then powder blank of the centering pericardium containing copper wire
It is sintered, copper wire diffuses to after blank ontology forms centre bore at occupy-place, need to without following process or only finish i.e.
It can get the centre bore of high quality.
4. common copper wire can meet occupy-place requirement, compared with existing capillary processing technology, production cost is reduced, shortens life
Produce the period.
Fig. 1 is the process flow chart of existing powder metallurgical technique lqiuid phase sintering method.
Fig. 2 is the process flow chart of existing powder metallurgical technique infiltration method.
Fig. 3 is the sectional view of present invention molding subtraction unit.
Fig. 4 is the sectional view that the present invention projects subtraction unit.
Fig. 5 is the sectional view that the present invention squeezes out subtraction unit.
Wherein：101, the first mold；102, push-down head；103, seaming chuck；104, the first cut-out tool bore；105, cutoff tool；
106, copper wire cuts off hole；107, the first copper wire；108, upper grip；109, lower collet；110, the first powder；111, the first demoulding top
Pin hole；201, the second mold；202, right mould head；203, left mould head；204, gate plate；205, the second cut-out hole；206, third is cut
Disconnected hole；207, fixture block；208, the second demoulding thimble hole；209, the second copper wire；210, the second powder；301, mould cylinder；302, mould cylinder
Bottom plate；303, extrusion die mouth；304, actinobacillus device；305, draft gear；306, third powder；307, third copper wire；308, enter
Material mouth.
Specific implementation mode
Below in conjunction with the accompanying drawings, illustrate the specific implementation mode of the present invention.
1. the method for preparing tungsten copper capillary of the present embodiment, technological process are：Tungsten-copper alloy powder prepare, powder at
Type, de- forming agent, sintering and post-processing, in powder forming process, at powder center, merging copper wire carries out occupy-place, after powder molding
It is sintered, in sintering process, powder forms tungsten copper bar, and copper wire infiltration diffuses to tungsten copper bar ontology, and in tungsten copper stick
Material body central forms pore；
As shown in figure 3, powder molding use die pressing, the apparatus structure that die pressing uses for：Including the first mold 101,
First mold 101 be in cylindrical structure, middle part be provided with notch, the bottom centre of notch have may pass through copper wire reach through hole and
The side wall surface upper and lower part in the first demoulding thimble hole 111, cylindrical structure is not provided with the first cut-out tool bore 104；First mold
Push-down head 102, seaming chuck 103, push-down head 102, seaming chuck 103 and first are placed in bottom respectively with top in 101 notch
The internal face of mold 101 forms the cavity for placing the first powder 110, push-down head 102, seaming chuck 103 have can at center
Across the reach through hole of copper wire, it is provided with copper wire with reach through hole vertical direction and cuts off hole 106, copper wire cuts off hole 106 and the first cutoff tool
Hole 104 is corresponding；Seaming chuck 102 is more than the outer diameter of the first mold 101 at T-type structure, the upper end diameter；
Its concrete operation step is as follows：
The first step prepares powder：Tungsten powder and copper powders are pressed 17:3 ratio mixing, is added forming agent and the first powder is made
Body 110；
Second step, fixing mould：Releasing agent is coated in the internal face of 101 notch of the first mold, and secures it to mould bases
On；
Third step is put into pressure head：It is put into push-down head 102 and seaming chuck 103 in 101 notch of the first mold, and with first
101 inner wall of mold is bonded, and 103 upper end of seaming chuck is higher than the cast gate of the first mold 101；
4th step, merging copper wire：First copper wire 107 is penetrated into seaming chuck 103, push-down head 102 and the first mold 101 successively
Center reach through hole, and stretch out the first mold 101 outside, the both ends of the first copper wire 107 pass through upper grip 108, lower collet respectively
109 application tensile forces are fixed；
5th step, compacting powder：The cast gate that seaming chuck 103 makes its lower end be higher than 101 top of the first mold is promoted, by first
Powder 110 is injected from 101 cast gate of the first mold, pushes seaming chuck 103, and the powder in the first mold 101 is compressed, and keeps
Pressure 10-30 minutes；
6th step, pressing molding：The 5th step is repeated, until 110 weight of the first powder and height in 101 cavity of the first mold
Reach requirement, the first cut-out tool bore 104 keeps flushing and being connected to copper wire cut-out hole 106 at this time；
7th step, cut-out copper wire：Cutoff tool 105 is inserted into respectively in the first cut-out tool bore 104, and is deeply cut off to copper wire
Hole 106 cuts off the first copper wire 107, then extracts cutoff tool 105 out；
8th step, demoulding：Seaming chuck 103 is taken out, ejection piece is installed in the first demoulding thimble hole 111, by push-down head 102
It is ejected with the first powder 110, that is, obtains the powder blank that center carries the first copper wire 107；
9th step, sintering：The powder blank obtained in 8th step is subjected to removing forming agent processing, and molten between tungsten copper
It being sintered at a high temperature of between point, powder blank forms tungsten copper bar, while 107 infiltration of the first copper wire is into tungsten copper bar ontology,
And it is centrally formed center pore in tungsten copper bar ontology；
Tenth step, post-processing：Outer diameter and center pore to tungsten copper bar carry out machining.
The method for preparing tungsten copper capillary of the present embodiment, according to the design requirement of tungsten copper capillary draw ratio, the first mould
Tool 101 can also use radial two points of mode structures, radial two points of moulds during demoulding, can meet to avoid draft
The manufacture demand of the bigger tungsten copper capillary of major diameter.
The method for preparing tungsten copper capillary of the present embodiment, in the first step, the ratio between tungsten powder and copper powders may be used also
To be set as 4:1.
2. the method for preparing tungsten copper capillary of the present embodiment, technological process are：Tungsten-copper alloy powder prepare, powder at
Type, de- forming agent, sintering and post-processing, in powder forming process, at powder center, merging copper wire carries out occupy-place, after powder molding
It is sintered, in sintering process, powder forms tungsten copper bar, and copper wire infiltration diffuses to tungsten copper bar ontology, and in tungsten copper stick
Material body central forms pore；
As shown in figure 4, powder molding use method of radiation, the apparatus structure that method of radiation uses for：Including the second mold 201,
Second mold 201 be in cylindrical structure, middle part be provided with notch, the bottom centre of notch have may pass through copper wire reach through hole and
Second demoulding thimble hole 208 is provided with the second cut-out tool bore on the wall surface of cylindrical structure side；Bottom in the notch of second mold 201
Right mould head 202 is placed in portion, and 202 center of right mould head is provided with the reach through hole that may pass through copper wire, and second is provided with reach through hole vertical direction
Hole 205 is cut off, the second cut-out hole 205 is corresponding with the second cut-out tool bore；The top end surface of second mold, 201 notch connects left mould
First 203, left mould head 203 is provided with symmetrical two circular holes at cylindrical structure, middle part, and cylindrical structure, which is provided centrally with, to be worn
The reach through hole for crossing copper wire is provided with third with reach through hole vertical direction and cuts off hole 206；Left mould head 203 connects gate plate 204, cast gate
For plate 204 at cylindrical structure, middle part is provided with groove, and bottom portion of groove is provided with symmetrical two running channels, and two running channels are respectively with two
A circular hole connection, and the cavity for placing the second powder 210 is constituted with 201 internal face of the second mold and right mould head 202.
Its concrete operation step is as follows：
The first step prepares powder：Tungsten powder and copper powders are pressed 17:3 ratio mixing, is added forming agent and the second powder is made
Body 210；
Second step, fixing mould：Releasing agent is coated in 201 inner cylinder face of the second mold, and secures it to mould bases；
Third step is put into die head：It is put into right mould head 202 in 201 notch of the second mold, is connected in 201 left side of the second mold
Left mould head 203 is connect, releasing agent is coated in 203 inner wall of left mould head；
4th step, merging copper wire：The second upset copper wire 209 of one end is penetrated into left mould head 203,202 and of right mould head successively
Second mold, 201 center reach through hole, and stretch out outside the second mold 201, by the reach through hole card of upset one end and left mould head 203
Tightly, the external part of the second copper wire 209 is fixed with fixture block 207, and applies tension to ensure its tensioning；
5th step, installation gate plate：Gate plate 204 is connected in 203 left side of left mould head；
6th step injects powder：The exit wound of bullet of the left side of gate plate 204 connection ejaculator, starts ejaculator, hopper conveying the
Two powders 210 are to screw rod, and motor is projected the second powder 210 by transmission system drives screw rod, via the circular hole of gate plate 204
Running channel is filled into the second mold 201, keeps pressure 10-30 minutes；
7th step, cut-out copper wire：Copper wire cutoff tool is inserted into the second cut-out hole 205 respectively, third cuts off hole 206, by the
Two copper wires 209 are cut off, and take out copper wire cutoff tool；
8th step, demoulding：Gate plate 204, left mould head 203 are removed, ejection piece, top are installed in the second demoulding thimble hole 208
Go out right mould head 202 and the second powder 210, that is, obtains the powder blank that center carries copper wire；
9th step, powder processing：The machining of outer shape is carried out to the powder blank that the 8th step obtains；
Tenth step carries out de- forming agent processing to the powder blank that the 9th step processes, and is then sintered, post-processes,
Sintering, post-processing are identical as the operation of die pressing corresponding steps.
The method for preparing tungsten copper capillary of the present embodiment, according to the design requirement of tungsten copper capillary draw ratio, the second mould
Tool 201 can also use radial two points of mode structures, radial two points of moulds during demoulding, can meet to avoid draft
The manufacture demand of the bigger tungsten copper capillary of major diameter.
The method for preparing tungsten copper capillary of the present embodiment, the circular hole that 203 middle part of left mould head is arranged symmetrically can also be arranged
It is 2 pairs.
The method for preparing tungsten copper capillary of the present embodiment, in the first step, the ratio between tungsten powder and copper powders may be used also
To be set as 4:1.
3. the method for preparing tungsten copper capillary of the present embodiment, technological process are：Tungsten-copper alloy powder prepare, powder at
Type, de- forming agent, sintering and post-processing, in powder forming process, at powder center, merging copper wire carries out occupy-place, is subsequently burning
During knot, powder forms tungsten copper bar, and copper wire infiltration is formed carefully into tungsten copper bar ontology, and in tungsten copper bar body central
Hole；
As shown in figure 5, powder molding use extrusion molding, the apparatus structure that extrusion molding uses for：Including mould cylinder 301, mould cylinder
301 both ends are connect with mould tube end plate 302 and extrusion die mouth 303 respectively, mould tube end plate 302, mould cylinder 301 and extrusion die mouth 303
The cavity for placing third powder 306 is constituted, further includes that the actinobacillus device 304 of unwrapping wire and leading for traction copper wire movement are carried out to copper wire
Leading-in device 305；Feeding mouth 308 is provided in 301 side wall surface of mould cylinder, 302 center of mould tube end plate is provided with the reach through hole that may pass through copper wire,
303 inside of extrusion die mouth forms cone tank, and conical rebate small end face is extended with straight-through notch；
Its concrete operation step is as follows：
The first step prepares powder：Tungsten powder, copper powders are pressed 17:3 ratio mixing, is added forming agent and third powder is made
Body 306；
Second step, fixing mould：Mould cylinder 301 is fixed to mould bases, 301 left side connection mould tube end plate 302 of mould cylinder, mould cylinder
301 right side connection extrusion die mouths 303；
Third step, merging copper wire：Third copper wire 307 is penetrated into wearing for 302 center of mould tube end plate successively with actinobacillus device 304
Through-hole, through inside mould cylinder 301, stretch out the outside of extrusion die mouth 303, pass through draft gear 305；
4th step squeezes powder：It is squeezed into mould cylinder 301 from feeding mouth 308 by the pressurization of third powder 306, and at the uniform velocity by it
Slave extrusion die mouth 303 in squeeze out, the extruding through 303 conical rebate of extrusion die mouth and straight-through notch, from extrusion die mouth 303 squeeze
306 diameter of third powder gone out becomes smaller, while drawing third copper wire 307 by draft gear 305, coordinates with actinobacillus device 304
The tension and speed for controlling third copper wire 307, keep it identical as 306 extrusion molding speed of third powder；In the third being extruded
Bracket is arranged in 306 lower section of powder, and bracket is semi-cylindrical shaped structure, and the internal diameter of semi-cylindrical shaped structure is more than 306 diameter of third powder,
And hold up third powder 306 from downside；Stomata is provided in semi-cylindrical shaped structure, gas is passed through from stomata, in semi-cylindrical shaped knot
One layer of gas membrane is formed between the inner wall and third powder of structure, to reduce the friction of third powder and tray chamber, mitigates powder
Deformation.
5th step, cut-out powder：When the third powder 306 of extrusion reaches requirement length, stops powder extrusion and copper wire is led
Draw, the third powder 306 of extrusion and the segmentation of in-between third copper wire are cut into powder blank；
6th step after powder blank is carried out de- forming agent processing, is sintered and post-processes, be sintered, post-process and
The operation of die pressing corresponding steps is identical；
7th step manually pulls out the third copper wire 307 after cut-out, resets in draft gear 305, repeats the 5th
Step, the 6th step, it is sustainable to process the tungsten copper capillary met the requirements.
The method for preparing tungsten copper capillary of the present embodiment, in the first step, the ratio between tungsten powder and copper powders may be used also
To be set as 4:1.
The above-mentioned method for preparing tungsten copper capillary, is all made of lqiuid phase sintering method as shown in Figure 1, infiltration method also can be used,
Its technological process is as shown in Figure 2：Tungsten powder body prepares, powder molding, takes off forming agent, pre-sintering, sintering, infiltration and post-processing, tungsten
Powder is prepared as the agent of tungsten powder mixed-forming or tungsten powder body is made in induction copper powder, during tungsten powder is body formed, is equally based on mould
Platen press, method of radiation or extrusion, at powder center, merging copper wire carries out occupy-place needs elder generation if preparing tungsten powder body using forming agent
It removes forming agent, be pre-sintered, be then sintered, powder forms W skeleton, and center copper wire infiltration is into W skeleton, and in W skeleton
It is centrally formed pore, then carries out infiltration of copper：It is penetrated into after copper is melted in the gap of the W skeleton containing centre bore, tungsten is made
Copper capillary tube finally carries out finishing to outer diameter and centre bore and obtains qualified tungsten copper capillary；If using induction copper powder system
Standby tungsten powder body is then sintered after powder molding, infiltration of copper and post-processing.
Above description is explanation of the invention, is not the restriction to invention, limited range of the present invention is referring to right
It is required that within protection scope of the present invention, any type of modification can be made.
Claims (4)
1. a kind of method preparing tungsten copper capillary, technological process are：It is prepared by tungsten-copper alloy powder, powder molding, de- forming agent,
Sintering and post-processing, it is characterised in that：In the powder forming process, powder center merging copper wire carry out occupy-place, powder at
It is sintered after type, in sintering process, powder forms tungsten copper bar, and copper wire infiltration diffuses to tungsten copper bar ontology, and in institute
It states tungsten copper bar body central and forms pore；
Powder molding uses die pressing, the apparatus structure that die pressing uses for：Including the first mold (101), described first
Mold (101) is in cylindrical structure, and middle part is provided with notch, has the reach through hole that may pass through copper wire and the in the bottom centre of notch
The side wall surface upper and lower part in one demoulding thimble hole (111), cylindrical structure is not provided with the first cut-out tool bore (104)；First mould
Have bottom in the notch of (101) and places push-down head (102), seaming chuck (103), the push-down head (102), upper pressure respectively with top
The cavity of the internal face of head (103) and the first mold (101) formation the first powder of placement (110), the push-down head (102),
The center of seaming chuck (103) has the reach through hole that may pass through copper wire, and being provided with copper wire with reach through hole vertical direction cuts off hole
(106), copper wire cut-out hole (106) is corresponding with the first cut-out tool bore (104)；The seaming chuck (102) at T-type structure,
The upper end diameter is more than the outer diameter of the first mold (101)；
Its concrete operation step is as follows：
The first step prepares powder：Tungsten copper powder is mixed, forming agent is added, the first powder (110) is made；
Second step, fixing mould：Releasing agent is coated in the internal face of the first mold (101) notch, and is secured it on mould bases；
Third step is put into pressure head：It is put into push-down head (102) and seaming chuck (103) in the first mold (101) notch, and with
One mold (101) inner wall is bonded, and seaming chuck (103) upper end is higher than the cast gate of the first mold (101)；
4th step, merging copper wire：First copper wire (107) is penetrated into seaming chuck (103), push-down head (102) and the first mold successively
(101) center reach through hole, and the first mold (101) outside is stretched out, the both ends of the first copper wire (107) pass through upper grip respectively
(108), lower collet (109) applies tensile force and is fixed；
5th step, compacting powder：The cast gate that seaming chuck (103) makes its lower end be higher than the first mold (101) top is promoted, by first
Powder (110) is injected from the first mold (101) cast gate, seaming chuck (103) is pushed, by the powder pressure in the first mold (101)
Tightly, and pressure is kept 10-30 minutes；
6th step, pressing molding：The 5th step is repeated, until the first powder (110) weight and height in the first mold (101) cavity
Reach requirement, the first cut-out tool bore (104) keeps flushing and being connected to copper wire cut-out hole (106) at this time；
7th step, cut-out copper wire：Cutoff tool (105) is inserted into respectively in the first cut-out tool bore (104), and deeply to copper wire
It cuts off hole (106), the first copper wire of cut-out (107) then extracts cutoff tool (105) out；
8th step, demoulding：Seaming chuck (103) is taken out, ejection piece is installed in the first demoulding thimble hole (111), by push-down head
(102) and the first powder (110) ejection, i.e. acquisition center carry the powder blank of the first copper wire (107)；
9th step, sintering：The powder blank obtained in 8th step is subjected to removing forming agent processing, and between tungsten copper fusing point
At a high temperature of be sintered, powder blank forms tungsten copper bar, while the first copper wire (107) infiltration is into tungsten copper bar ontology, and
It is centrally formed center pore in the tungsten copper bar ontology；
Tenth step, post-processing：Outer diameter and center pore to tungsten copper bar carry out machining.
2. a kind of method preparing tungsten copper capillary, technological process are：It is prepared by tungsten-copper alloy powder, powder molding, de- forming agent,
Sintering and post-processing, it is characterised in that：In the powder forming process, powder center merging copper wire carry out occupy-place, powder at
It is sintered after type, in sintering process, powder forms tungsten copper bar, and copper wire infiltration diffuses to tungsten copper bar ontology, and in institute
It states tungsten copper bar body central and forms pore；
Powder molding uses method of radiation, the apparatus structure that method of radiation uses for：Including the second mold (201), described second
Mold (201) is in cylindrical structure, and middle part is provided with notch, has the reach through hole that may pass through copper wire and the in the bottom centre of notch
Two demoulding thimble holes (208) are provided with the second cut-out tool bore on the wall surface of cylindrical structure side；In the notch of second mold (201)
Right mould head (202) is placed in bottom, and right mould head (202) center is provided with the reach through hole that may pass through copper wire, with reach through hole Vertical Square
To the second cut-out hole (205) is provided with, second cut-out hole (205) is corresponding with the second cut-out tool bore；Second mold
(201) the top end surface connection left mould head (203) of notch, the left mould head (203) are provided with multiple at cylindrical structure, middle part
Circular hole, the cylindrical structure are provided centrally with the reach through hole that may pass through copper wire, and third cut-out is provided with reach through hole vertical direction
Hole (206)；Left mould head (203) the connection gate plate (204), the gate plate (204) are provided at cylindrical structure, middle part
Groove, the bottom portion of groove are provided with running channel corresponding with the circular hole, and with the second mold (201) internal face and right mould head
(202) cavity for placing the second powder (210) is constituted.
Its concrete operation step is as follows：
The first step prepares powder：Tungsten copper powder is mixed, forming agent is added, the second powder (210) is made；
Second step, fixing mould：Releasing agent is coated in the second mold (201) inner cylinder face, and secures it to mould bases；
Third step is put into die head：It is put into right mould head (202) in the second mold (201) notch, on the left of the second mold (201)
Left mould head (203) is connected, releasing agent is coated in left mould head (203) inner wall；
4th step, merging copper wire：Upset the second copper wire (209) in one end is penetrated into left mould head (203), right mould head (202) successively
With the second mold (201) center reach through hole, and stretch out that the second mold (201) is external, by upset one end and left mould head (203)
Reach through hole clamping fixes the external part of the second copper wire (209) with fixture block (207), and applies tension to ensure its tensioning；
5th step, installation gate plate：The connection gate plate (204) on the left of left mould head (203)；
6th step injects powder：The exit wound of bullet of connection ejaculator on the left of the gate plate (204) starts ejaculator, hopper conveying
Second powder (210) is to screw rod, and motor is projected the second powder (210) by transmission system drives screw rod, via gate plate
(204) circular hole running channel is filled into the second mold (201), keeps pressure 10-30 minutes；
7th step, cut-out copper wire：Copper wire cutoff tool is inserted into second cut-out hole (205), third cut-out hole (206) respectively,
Second copper wire (209) are cut off, copper wire cutoff tool is taken out；
8th step, demoulding：Gate plate (204), left mould head (203) are removed, ejection piece is installed in the second demoulding thimble hole (208),
Right mould head (202) and the second powder (210) are ejected, that is, obtains the powder blank that center carries copper wire；
9th step, powder processing：The machining of outer shape is carried out to the powder blank that the 8th step obtains；
Tenth step carries out de- forming agent processing to the powder blank that the 9th step processes, and is then sintered, post-processes, described
Sintering, post-processing are identical as the operation of die pressing corresponding steps.
3. a kind of method preparing tungsten copper capillary as claimed in claim 1 or 2, it is characterised in that：First mold
(101), the second mold (201) is using radial two points of mode structures.
4. a kind of method preparing tungsten copper capillary, technological process are：It is prepared by tungsten-copper alloy powder, powder molding, de- forming agent,
Sintering and post-processing, it is characterised in that：In the powder forming process, at powder center, merging copper wire carries out occupy-place, follow-up
In sintering process, powder forms tungsten copper bar, and copper wire infiltration is into tungsten copper bar ontology, and in the tungsten copper bar body central shape
At pore；
Powder molding uses extrusion molding, the apparatus structure that extrusion molding uses for：Including mould cylinder (301), the two of mould cylinder (301)
End is connect with mould tube end plate (302) and extrusion die mouth (303) respectively, the mould tube end plate (302), mould cylinder (301) and extrusion die
Mouth (303) constitutes the cavity for placing third powder (306), further includes actinobacillus device (304) and the traction that unwrapping wire is carried out to copper wire
The draft gear (305) of copper wire movement；It is provided with feeding mouth (308), the mould tube end plate in mould cylinder (301) side wall surface
(302) center is provided with the reach through hole that may pass through copper wire, and cone tank, the conical rebate are formed inside the extrusion die mouth (303)
Small end face is extended with straight-through notch；
Its concrete operation step is as follows：
The first step prepares powder：Tungsten copper powder is mixed, forming agent is added, third powder (306) is made；
Second step, fixing mould：Mould cylinder (301) is fixed to mould bases, mould tube end plate (302), mould cylinder are connected on the left of mould cylinder (301)
(301) right side connection extrusion die mouth (303)；
Third step, merging copper wire：Third copper wire (307) is penetrated into mould tube end plate (302) center successively with actinobacillus device (304)
Reach through hole, outside internal through mould cylinder (301), stretching out extrusion die mouth (303), passes through draft gear (305)；
4th step squeezes powder：It is squeezed into mould cylinder (301) from feeding mouth (308) by third powder (306) pressurization, and its is even
It is squeezed out in the slave extrusion die mouth (303) of speed, the extruding through extrusion die mouth (303) conical rebate and straight-through notch, from extrusion die mouth
(303) third powder (306) diameter squeezed out in becomes smaller, while drawing third copper wire (307) by draft gear (305), with
The tension and speed of actinobacillus device (304) cooperation control third copper wire (307) make itself and third powder (306) extrusion molding speed
It spends identical；Bracket is set below the third powder 306 being extruded, and the bracket is semi-cylindrical shaped structure, the semi-cylindrical shaped
The internal diameter of structure is more than third powder (306) diameter, and holds up third powder (306) from downside；In the semi-cylindrical shaped structure
It is provided with stomata, gas is passed through from stomata, and one layer of gas is formed between the inner wall and third powder (306) of semi-cylindrical shaped structure
Film.
5th step, cut-out powder：When the third powder (306) of extrusion reaches requirement length, stop powder extrusion and copper wire traction,
The third powder (306) of extrusion and the segmentation of in-between third copper wire (307) are cut into powder blank；
6th step after powder blank is carried out de- forming agent processing, is sintered and post-processes, the sintering, post-processing with
The operation of the die pressing corresponding steps is identical；
7th step, manually by after cut-out third copper wire (307) pull out, reset in draft gear (305), repeat the 5th
Step, the 6th step.
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Effective date of registration: 20210413 Address after: 214112 3-1010 Tianan smart city, 228 Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province Patentee after: WUXI PILOT SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 214000 maoyehaoyuan 2-3203, Wuxi City, Jiangsu Province Patentee before: Zhu Huijia |