CN103406375A - Multi-blank closed type combination hole pattern drawing method - Google Patents
Multi-blank closed type combination hole pattern drawing method Download PDFInfo
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- CN103406375A CN103406375A CN2013103734835A CN201310373483A CN103406375A CN 103406375 A CN103406375 A CN 103406375A CN 2013103734835 A CN2013103734835 A CN 2013103734835A CN 201310373483 A CN201310373483 A CN 201310373483A CN 103406375 A CN103406375 A CN 103406375A
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- 238000000034 method Methods 0.000 title claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 84
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000004513 sizing Methods 0.000 claims description 20
- 230000009471 action Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 238000000137 annealing Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005491 wire drawing Methods 0.000 abstract 2
- 238000010621 bar drawing Methods 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000002356 single layer Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 10
- 244000309464 bull Species 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a multi-blank closed type combination hole pattern drawing method belonging to the technical field of metal section bar drawing. The multi-blank closed type combination hole pattern drawing method is characterized in that two or more than two pointed metal rod wire blanks are coaxially attached to or uniformly distributed on the surface of a pointed hard core rod in parallel in a single-layer form, pass through a drawing mold hole pattern, and plastically deform in a closed type combination hole pattern consisting of the wall of the drawing mold hole pattern and the surface of the hard core rod; a plurality of specially-shaped section metal wires of which the cross sections are identically-shaped can be obtained at one time through one-pass drawing; one-pass single-wire drawing can be performed as required, and the specially-shaped section metal wires with high dimensional accuracy are produced. The multi-blank closed type combination hole pattern drawing method has the advantages of energy conservation, consumption reduction, large pass deformation, high production efficiency and low production cost; a drawing mold is eliminated; the specially-shaped section metal wires with high quality and high performance can be efficiently produced in a short process through subsequent one-pass single-wire drawing and appropriate annealing treatment; the method is particularly suitable for near net shape forming of complicated specially-shaped section metal wires of which the cross section contour has a variable curve.
Description
Technical field
The invention belongs to shape drawing technique field, a kind of multi-blank enclosed combined pass Hubbing method particularly is provided.
Technical background
The profiled-cross-section metal wire rod refers to that cross section is non-circular metal wire rod, such as cross section is triangle, hexagon, octagon, rectangle, square, trapezoidal, rhombus or semicircle etc. profiled-cross-section metal wire rod and cross-sectional profiles complicated abnormal shape cross section metal wire rod (being the fan ring cross section metal wire rod of arc transition as corner) that curvilinear motion is arranged etc., in fields such as electric power transfer, electronic communication, communications and transportation, component of machine, articles for daily use, purposes is extremely widely arranged.After entering 21 century, due to becoming increasingly conspicuous of resource, the energy and environmental problem, to the production of profiled-cross-section metal wire rod, short flow process, high efficiency, the requirement such as energy-saving and cost-reducing, low-cost have been proposed.Particularly, in recent years along with the fast development of national economy high and new technology and defence and military, the demand of profiled-cross-section metal wire rod is constantly increased, also more and more higher to the requirement of product quality and performances.
Traditional single strand drawing method is mainly adopted in the production of existing profiled-cross-section metal wire rod, has drawing mould simplicity of design, easy to process, the drawing process laid down by is easier to, can obtain the advantages such as profiled-cross-section metal wire rod of a large amount of varying cross-section shapes, be also to produce at present most important or even unique method that cross-sectional profiles has the complicated abnormal shape cross section metal wire rod of curvilinear motion.But, while adopting traditional single strand drawing method to produce the profiled-cross-section metal wire rod, exist that technological process is long, many, the required drawing mould amounts of drawing passes are large, drawing deformation for a pass is little, die life is short, product surface easily scratches and crack, break that frequency is high, intermediate annealing often, production efficiency is low, overcome that the energy that friction consumes is large, production cost is high, stock utilization is low and the uniformity of the quality and performance of profiled-cross-section metal wire rod and stability are difficult to guarantee, the quality and performance of product is difficult to the problems such as satisfied higher instructions for use.
In order to improve the production efficiency of profiled-cross-section metal wire rod, the researcher has developed simultaneously 2 or 2 directly coaxial parallel clusters of above circular metal blank has been passed to drawing mould, the bull Hubbing method of many profiled-cross-section metal wire rods of drawing forming.While due to employing bull Hubbing method, producing the profiled-cross-section metal wire rod, metal stock is that while drawing under same technique forms, be under identical mould, pulling capacity, friction, drawing speed and other technological parameter conditions, many profiled-cross-section metal wire rods that obtain have very surface quality, geomery, institutional framework and the mechanical property etc. that approach, the advantage such as have that production efficiency is high, good product quality, production cost are low.But, when the profiled-cross-section metal wire rod is produced in the bull drawing, what take is that 2 or the directly coaxial parallel clusters of 2 above metal stocks are passed to the mode that drawing mould carries out drawing, because these metal stocks are material of the same race, and be under homologous state, so character each other is almost completely identical, so in the drawing deformation process, the interface stress balance that these metal stocks that deformability is identical are being in contact with one another, the interface shape that makes cross-section is straight line, therefore the cross-sectional profiles of the profiled-cross-section metal wire rod of drawing forming gained (except every blank and part that drawing mould contacts) is all straight line, can obtain cross section is triangle, hexagon, octagon, rectangle, square, trapezoidal, the profiled-cross-section metal wire rod product of rhombus or semicircle etc., and can't obtain the complicated abnormal shape cross section metal wire rod (being the fan ring cross section metal wire rod of arc transition as corner) that cross-sectional profiles has curvilinear motion by direct drawing.If produce the metal wire rod in complicated abnormal shape cross section, need follow-up multi-pass single strand drawing, cause technological process long, required drawing mould is more, and production efficiency is low, and production cost is high, and product quality and performances are difficult to meet instructions for use.
Therefore, develop a kind of high efficiency, energy-saving and cost-reducing, the low-cost production quality and performance is high and the complicated abnormal shape cross section metal wire rod of uniformity and good stability, particularly can also meet nearly end form shaping cross-sectional profiles and have the drawing new method that the complicated abnormal shape cross section metal wire rod of curvilinear motion requires, have very urgent and important meaning.
Summary of the invention
The present invention is in tradition fixedly on the basis of drawing mould Hubbing method, the pass in groove rolling (i.e. the groove of two rolls formed aperture on rolling surface) concept introduced and developed and propose.Adopt hardness far above the metal wire rod of metal rod wire blank as the hard core bar, many metal rod wire blanks are with the coaxial parallel surface of being close to and evenly being arranged in the hard core bar of form of single sheet, in tradition, fixedly in the drawing mould drawing process, make metal rod wire blank and hard core bar synchronizing moving, and simultaneously from tradition fixedly the drawing mould pass drawing pass through, in this process, only having the metal rod wire blank, in the enclosed combined pass formed by drawing mould pass wall and hard core bar surface, plastic deformation occurs, and strain only occurs in the hard core bar, plastic deformation does not occur.By to the fixing appropriate design of drawing mould pass and hard core bar shape of cross section, make shape organic assembling between the two, realize the integrated of traditional fixedly drawing mould and motion hard core bar, by drawing mould pass wall and hard core bar surface, form the enclosed combined pass, under the effect of drawing mechanism, obtain the profiled-cross-section metal wire rod of required shape of cross section.Develop on this basis a kind of multi-blank enclosed combined pass Hubbing method (being called again " multi-blank belt carcass Hubbing method ") that single strand drawing method and bull Hubbing method are united two into one, take full advantage of can the be shaped profiled-cross-section metal wire rod of complicated shape of cross section of single strand drawing method, and bull Hubbing method production efficiency is high, the advantage such as product quality and performances and uniformity and good stability, realize shortening to greatest extent existing drawing production process flow process, improve the quality and performance of drawing forming profiled-cross-section metal wire rod (particularly complicated abnormal shape cross section metal wire rod), improve lumber recovery and production efficiency, reduce production costs, energy-saving and cost-reducing, accelerate the development of Hubbing method and apply, expand kind and the purposes such as specification and range of application of drawing profiled-cross-section metal wire rod, solve current single strand drawing method and bull Hubbing method exist when producing the profiled-cross-section metal wire rod problem.
A kind of multi-blank enclosed combined pass Hubbing method, it is characterized in that, by the metal rod wire blank of 2 or 2 above pointings with the coaxial parallel surface of being close to and evenly being arranged in the hard core bar of a pointing of form of single sheet, blank and core bar boundling pass the drawing mould pass, after together by clamp, being clamped, carry out drawing, wherein the total cross-sectional area A of blank
0With the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
0/ A<1.5, core bar cross-sectional area A
1With the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
1Plastic deformation occurs in/A<0.95, blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain the many profiled-cross-section metal wire rods that shape of cross section is identical.
A kind of multi-blank enclosed combined pass Hubbing method, it is characterized in that, the metal rod wire blank boundling of 2 or 2 above pointings is passed to the drawing mould pass, after together by clamp, being clamped, start drawing, the hard core bar of a pointing is inserted to the centre of metal rod wire blank in drawing process from drawing mould pass arrival end, and the assurance blank is evenly arranged with form of single sheet and is close to the core bar surface, by the rubbing action between blank and core bar interface, together bring core bar into the drawing mould pass and carry out drawing, wherein the total cross-sectional area A of blank
0With the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
0/ A<1.5, core bar cross-sectional area A
1With the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
1Plastic deformation occurs in/A<0.95, blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain the many profiled-cross-section metal wire rods that shape of cross section is identical.
The cross section of described metal rod wire blank is circle or special-shaped.
Described hard core bar is that cross section is circular or special-shaped metal wire rod; Strain, far above described metal rod wire blank, only occurs in the hardness of described hard core bar in drawing process, plastic deformation does not occur; Described hard cores pole-footing need to carry out unwrapping wire and batch according to drawing.
Described drawing mould pass is circle or special-shaped.
After multi-blank enclosed combined pass drawing forming finishes, can then carry out a time deflection as required and be no more than 20% single strand drawing, the profiled-cross-section metal wire rod of shaping required size precision.And, after multi-blank enclosed combined pass drawing forming finishes, or after deflection is no more than 20% single strand drawing, as required also can follow-up suitable annealing in process, obtain high performance profiled-cross-section metal wire rod.
Major advantage of the present invention is:
1, in multi-blank enclosed combined pass drawing process, only have the outside of metal rod wire blank and fixedly drawing mould pass wall come in contact, produce harmful friction; And between the metal rod wire blank, be relatively static friction free; And the friction between metal rod wire blank and hard core bar is useful friction, save the energy.
2, the pass deformation of multi-blank enclosed combined pass drawing is large, and for example a time can be that circular metal rod wire blank pulls into cross-sectional aspect ratio and surpasses 1.6 the profiled-cross-section metal wire rod that larger spill is arranged by a cross section; Production efficiency is high.
3, the conventional drawing forming operation of profiled-cross-section metal wire rod has greatly been simplified in the drawing of multi-blank enclosed combined pass, has shortened production procedure; The hard core bar adopted can be reused, and the life-span is long; Do not need to adopt the drawing mould of many covers cross section gradual change, only need carry out the appropriate design transformation to existing drawbench and get final product; Production cost and metal consumption have been reduced, efficiently drawing forming profiled-cross-section metal wire rod.
4, the enclosed combined pass simplicity of design in multi-blank enclosed combined pass Hubbing method, easy to process, only needs respectively drawing mould pass and hard core bar surface configuration are designed and process to get final product, and die cost is low.
5, multi-blank enclosed combined pass Hubbing method not only can be produced the various profiled-cross-section metal wire rods that existing single strand drawing method and bull Hubbing method can be produced, but also is specially adapted to the complicated abnormal shape cross section metal wire rod that the near net shape production cross-sectional profiles has curvilinear motion.
6, the profiled-cross-section metal wire rod quality and performance of multi-blank enclosed combined pass drawing production is high, uniformity, uniformity and good stability.
7, the combined method of the combined pass drawing of a time multi-blank enclosed and a time single strand drawing and suitable annealing in process has greatly been simplified traditional forming process of complicated abnormal shape cross section metal wire rod, shorten production procedure, be conducive to obtain high-quality, high performance complicated abnormal shape cross section metal wire rod.
The accompanying drawing explanation
Fig. 1 be many metal rod wire blanks of the present invention and hard core bar together boundling pass the drawing mould pass and by clamp, clamped the schematic diagram of realizing the drawing of multi-blank enclosed combined pass.Wherein (1) is the metal rod wire blank; (2) be the hard core bar; (3) be drawing mould; (4) be the drawing mould die sleeve; (5) be clamp.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is that hard core bar of the present invention is brought into friction mode the schematic diagram that the drawing mould pass is realized the drawing of multi-blank enclosed combined pass by many metal rod wire blanks.Wherein (1) is the metal rod wire blank; (2) be the hard core bar; (3) be drawing mould; (4) be the drawing mould die sleeve; (5) be clamp.
Fig. 4 is the A-A profile of Fig. 1.
The specific embodiment
Below in conjunction with embodiment, the present invention is specifically described; be necessary to be pointed out that at this present embodiment only is used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, the those of skill in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1:
By the perfect recrystallization annealed state circular cross section aluminum steel blank (diameter 5mm) of 3 pointings with the coaxial parallel surface of drawing state circular cross section high-carbon steel hard core bar of being close to and evenly being arranged in the pointing of a diameter 1.8mm of form of single sheet, it is circular drawing mould pass (sizing area diameter 8.5mm) that blank and core bar boundling pass pass, after together by clamp, being clamped, carry out drawing, wherein the total cross-sectional area A of blank
0With the ratio of drawing mould pass sizing area cross-sectional area A, be 1.04, the core bar cross-sectional area A
1With the ratio of drawing mould pass sizing area cross-sectional area A be 0.04, plastic deformation occurs in blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain 3 profiled-cross-section aluminium wires that shape of cross section is identical.The annealing in process of follow-up 350 ℃ of insulation 1h, obtain aerial condutor that tensile strength 60-90MPa, electrical conductivity be greater than 63%IACS with profiled-cross-section annealed aluminum wire material.
Embodiment 2:
It is circular drawing mould pass (sizing area diameter 9.75mm) that perfect recrystallization annealed state circular cross section aluminum steel blank (diameter 5mm) boundling of 4 pointings is passed to pass, after together by clamp, being clamped, start drawing, the drawing state circular cross section of the pointing of a diameter 3.25mm 304 stainless steel hard core bars are inserted to the centre of 4 aluminum steel blanks in drawing process from drawing mould pass arrival end, and the assurance blank is evenly arranged with form of single sheet and is close to the core bar surface, by the rubbing action between blank and core bar interface, together bring core bar into the drawing mould pass and carry out drawing, the total cross-sectional area A of blank wherein
0with the ratio of drawing mould pass sizing area cross-sectional area A, be 1.05, the core bar cross-sectional area A
1with the ratio of drawing mould pass sizing area cross-sectional area A be 0.11, plastic deformation occurs in blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain 4 profiled-cross-section aluminium wires that shape of cross section is identical.Then carry out again a time deflection and be 12.4% single strand drawing, obtain the profiled-cross-section aluminium wire of high dimensional accuracy.The annealing in process of follow-up 350 ℃ of insulation 1h, obtain aerial condutor that tensile strength 60-90MPa, electrical conductivity be greater than 63%IACS with profiled-cross-section annealed aluminum wire material.
Embodiment 3:
By the perfect recrystallization annealed state circular cross section pure copper wire blank (diameter 5mm) of 5 pointings with the coaxial parallel surface of drawing state circular cross section high-carbon steel hard core bar of being close to and evenly being arranged in the pointing of a diameter 4.9mm of form of single sheet, it is circular drawing mould pass (sizing area diameter 11.4mm) that blank and core bar boundling pass pass, after together by clamp, being clamped, carry out drawing, wherein the total cross-sectional area A of blank
0With the ratio of drawing mould pass sizing area cross-sectional area A, be 0.96, the core bar cross-sectional area A
1With the ratio of drawing mould pass sizing area cross-sectional area A be 0.18, plastic deformation occurs in blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain 5 profiled-cross-section pure copper wires that shape of cross section is identical.
Embodiment 4:
By the perfect recrystallization annealed state circular cross section pure aluminum wire blank (diameter 5mm) of 6 pointings with the coaxial parallel surface of drawing state circular cross section medium carbon steel hard core bar of being close to and evenly being arranged in the pointing of a diameter 6.5mm of form of single sheet, it is circular drawing mould pass (sizing area diameter 13mm) that blank and core bar boundling pass pass, after together by clamp, being clamped, carry out drawing, wherein the total cross-sectional area A of blank
0With the ratio of drawing mould pass sizing area cross-sectional area A, be 0.89, the core bar cross-sectional area A
1With the ratio of drawing mould pass sizing area cross-sectional area A be 0.25, plastic deformation occurs in blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain 6 profiled-cross-section fine aluminium wire rods that shape of cross section is identical.Then carry out again a time deflection and be 10.6% single strand drawing, obtain the profiled-cross-section fine aluminium wire rod of high dimensional accuracy.
Claims (8)
1. multi-blank enclosed combined pass Hubbing method, it is characterized in that, by the metal rod wire blank of 2 or 2 above pointings with the coaxial parallel surface of being close to and evenly being arranged in the hard core bar of a pointing of form of single sheet, blank and core bar boundling pass the drawing mould pass, after together by clamp, being clamped, carry out drawing, wherein the total cross-sectional area A of blank
0With the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
0/ A<1.5, core bar cross-sectional area A
1With the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
1Plastic deformation occurs in/A<0.95, blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain the many profiled-cross-section metal wire rods that shape of cross section is identical.
2. a kind of multi-blank enclosed combined pass Hubbing method as claimed in claim 1, it is characterized in that, the metal rod wire blank boundling of 2 or 2 above pointings is passed to the drawing mould pass, after together by clamp, being clamped, start drawing, the hard core bar of a pointing is inserted to the centre of metal rod wire blank in drawing process from drawing mould pass arrival end, and the assurance blank is evenly arranged with form of single sheet and is close to the core bar surface, by the rubbing action between blank and core bar interface, together bring core bar into the drawing mould pass and carry out drawing, the total cross-sectional area A of blank wherein
0with the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
0/ A<1.5, core bar cross-sectional area A
1with the ratio of drawing mould pass sizing area cross-sectional area A be 0<A
1plastic deformation occurs in/A<0.95, blank when being pulled through the enclosed combined pass consisted of drawing mould pass wall and hard core bar surface, after a time drawing, can once obtain the many profiled-cross-section metal wire rods that shape of cross section is identical.
3. as a kind of multi-blank enclosed combined pass Hubbing method as described in claim 1 or claim 2, the cross section that it is characterized in that described metal rod wire blank is circular or special-shaped.
4. as a kind of multi-blank enclosed combined pass Hubbing method as described in claim 1 or claim 2, it is characterized in that described drawing mould pass is circular or special-shaped.
5. as a kind of multi-blank enclosed combined pass Hubbing method as described in claim 1 or claim 2, it is characterized in that described hard core bar is that cross section is circular or special-shaped metal wire rod, its hardness is far above described metal rod wire blank, strain only occurs in drawing process, plastic deformation does not occur, and need to carry out unwrapping wire and batch according to drawing.
6. as a kind of multi-blank enclosed combined pass Hubbing method as described in claim 1 or claim 2, it is characterized in that carrying out as required the subsequent anneal processing, obtain high performance profiled-cross-section metal wire rod.
7. as a kind of multi-blank enclosed combined pass Hubbing method as described in claim 1 or claim 2, it is characterized in that then carrying out as required a time deflection is no more than 20% single strand drawing, the profiled-cross-section metal wire rod of shaping required size precision.
8. a kind of multi-blank enclosed combined pass Hubbing method as claimed in claim 7, is characterized in that carrying out as required the subsequent anneal processing, obtains high performance profiled-cross-section metal wire rod.
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| CN201310373483.5A CN103406375B (en) | 2013-08-23 | 2013-08-23 | Multi-blank closed type combination hole pattern drawing method |
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| CN201310373483.5A CN103406375B (en) | 2013-08-23 | 2013-08-23 | Multi-blank closed type combination hole pattern drawing method |
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| CN103406375A true CN103406375A (en) | 2013-11-27 |
| CN103406375B CN103406375B (en) | 2015-05-13 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807026A (en) * | 1971-07-07 | 1974-04-30 | Sumitomo Electric Industries | Method of manufacturing fine metallic filaments |
| JPS5788914A (en) * | 1980-11-21 | 1982-06-03 | Hitachi Cable Ltd | Method for drawing multicore superconductive wire |
| FR2584955A1 (en) * | 1985-01-08 | 1987-01-23 | Vaujours Ste Metallurg | Method for manufacturing a drawing die made from tungsten carbide, intended for drawing steel sections, of curvilinear geometry in the form of a V |
| JPH0691326A (en) * | 1992-09-14 | 1994-04-05 | Nippon Steel Corp | Production of hexagonal steel tube |
| JPH0947810A (en) * | 1995-08-02 | 1997-02-18 | Fujikura Ltd | Manufacture of aluminum coated composite steel wire |
| CN101157097A (en) * | 2007-11-23 | 2008-04-09 | 江苏亚太轻合金科技股份有限公司 | Polyhead preform continue drawing machine |
| CN101609736A (en) * | 2008-06-16 | 2009-12-23 | 日立电线株式会社 | The manufacture method of superconducting wire |
| CN202343604U (en) * | 2011-11-17 | 2012-07-25 | 蔡芳华 | Rotary die |
-
2013
- 2013-08-23 CN CN201310373483.5A patent/CN103406375B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807026A (en) * | 1971-07-07 | 1974-04-30 | Sumitomo Electric Industries | Method of manufacturing fine metallic filaments |
| JPS5788914A (en) * | 1980-11-21 | 1982-06-03 | Hitachi Cable Ltd | Method for drawing multicore superconductive wire |
| FR2584955A1 (en) * | 1985-01-08 | 1987-01-23 | Vaujours Ste Metallurg | Method for manufacturing a drawing die made from tungsten carbide, intended for drawing steel sections, of curvilinear geometry in the form of a V |
| JPH0691326A (en) * | 1992-09-14 | 1994-04-05 | Nippon Steel Corp | Production of hexagonal steel tube |
| JPH0947810A (en) * | 1995-08-02 | 1997-02-18 | Fujikura Ltd | Manufacture of aluminum coated composite steel wire |
| CN101157097A (en) * | 2007-11-23 | 2008-04-09 | 江苏亚太轻合金科技股份有限公司 | Polyhead preform continue drawing machine |
| CN101609736A (en) * | 2008-06-16 | 2009-12-23 | 日立电线株式会社 | The manufacture method of superconducting wire |
| CN202343604U (en) * | 2011-11-17 | 2012-07-25 | 蔡芳华 | Rotary die |
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|---|---|
| CN103406375B (en) | 2015-05-13 |
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