CN104138922B - A kind of production equipment and process of copper cover aluminum bimetallic composite wire rod - Google Patents

A kind of production equipment and process of copper cover aluminum bimetallic composite wire rod Download PDF

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Publication number
CN104138922B
CN104138922B CN201410289005.0A CN201410289005A CN104138922B CN 104138922 B CN104138922 B CN 104138922B CN 201410289005 A CN201410289005 A CN 201410289005A CN 104138922 B CN104138922 B CN 104138922B
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China
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copper
recipient
wire rod
composite wire
aluminium
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CN201410289005.0A
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Chinese (zh)
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CN104138922A (en
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刘彬彬
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湖南大学
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Publication of CN104138922B publication Critical patent/CN104138922B/en

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Abstract

A production equipment and process for copper cover aluminum bimetallic composite wire rod, belongs to metal material processing technical field.Equipment is watered stopping bar, temperature measurer, pressure mechanism, pressure ram, perforated hollow pin, recipient, extrusion die, cooling device, tank, tension mechanism and winder formed by heating element heater, aluminium hydraulic control temperature crucible, core metal.Technique is for put into recipient by copper base, and aluminium ingot puts into temperature control crucible, after the heating element heater of recipient outside is warmed up to assigned temperature, and insulation, under the effect of pressure mechanism, pressure ram moves down, and carries out perforation extruding to the copper base in recipient, formation clad copper pipe; When copper pipe extrusion die, that pulls open core metal aluminium liquid waters stopping bar, and owing to managing the effect of interior negative pressure, aluminium liquid is inhaled in copper pipe and solidifies, and by tension mechanism after cooling device and tank cool further, finally, winder carries out curling collection.Present device is simple, and technological process is short, is applicable to large-scale production; The Coating Aluminum Weir Materials with Copper Layer appearance and size of preparation is accurate, and core metal is without casting flaw, and the interface cleanness between outer layer metal copper and core metal aluminium is pollution-free, forms good metallurgical binding.

Description

A kind of production equipment and process of copper cover aluminum bimetallic composite wire rod
Technical field:
The production equipment and process of a kind of copper cover aluminum bimetallic composite wire rod provided by the invention, belongs to metal material processing technical field.
Background technology:
Copper cover aluminum bimetallic composite wire rod (Coppercladaluminum, CCA) be in the concentric coated layers of copper of aluminum core line outer surface, make two kinds of metals form interatomic metallurgical binding at interface and form a bulk metal wire rod, under ensureing the prerequisite of serviceability, possesses the advantage of two kinds of metals simultaneously.Copper cover aluminum bimetallic composite wire rod has good conductivity, density is little, quality is soft, good, the easy soldering of corrosion resistance, lower-price characteristic, be the novel substitute products of pure copper core cable.Special when high-frequency transmission, due to the effect of " kelvin effect ", current convergence transmits at the superficial layer of conductor, and application copper-clad aluminum conductor not only can reduce use cost, and can ensure good signal transmission quality.If copper cover aluminum bimetallic composite wire rod less for diameter is applied in Aero-Space, instrument coil, computer, electronic equipment and sound equipment coil as light-duty electromagnetic wire, then there is higher added value.The processing method of current copper cover aluminum bimetallic composite wire rod is a lot, substantially can be divided into solid-solid phase composite algorithm and the large class of liquid and solid bonding me thod two (see Xu Gaolei etc., non-ferrous metals processing, Vol.37, No.4 (2008), p.6).Gu-solid phase composite algorithm comprises Rolling compund, lateral compression compound, continuously extruded compound, drawing compound etc.; Liquid and solid bonding me thod comprises core-filled and continuously casted, horizontal casting direct combination is shaped (see: thank build new etc., a kind of coating material horizontal continuous casting direct recombination forming apparatus and technique, Chinese patent: ZL200610112817.3) etc.Gu although-solid phase composite algorithm can ensure good appearance and size requirement, interface bond strength is difficult to reach firmly metallurgical to closing; Core-filled and continuously casted method in liquid and solid bonding me thod adopts upper and lower two firing equipments, core metal and outer layer metal are melted respectively in upper and lower two heaters, when temperature in two heaters reaches the temperature of regulation, under the effect of the dummy bar of motor power traction, traction outer sphere molten metal enters crystallizer, outer layer metal tube is formed in crystallizer and mozzle, core metal liquid enters in outer layer metal tube thereupon, under certain pulling rate, then realize the compound of core metal and outer layer metal.The general principle that horizontal casting direct combination is shaped is similar to core-filled and continuously casted method, unlike the lead direction of dummy bar from vertically becoming level, because this increasing the length of goods.Because the outer copper pipe in liquid and solid bonding me thod is casting copper pipe, there are intrinsic some tissue defects of casting in it, as loose, and shrinkage cavity or shrink unequal, affect the quality of copper cover aluminum bimetallic composite wire rod, the bimetallic composite wire rod of pair cross-section complex contour is difficult to processing.The present invention proposes a kind of production equipment and process of novel copper cover aluminum bimetallic composite wire rod, the method that perforation extruding fills core in conjunction with continuous casting overcomes above-mentioned deficiency, outer field copper pipe is not only made to have extrusion tissue's structure, simultaneously, extruding of outer copper pipe, make the negative pressure formed in pipe, the situation that efficiently avoid feeding deficiency when forming aluminium core occurs.By the design of extrusion die, outer copper pipe cross sectional shape is no longer by any restriction.Interface between outer copper and aluminium core is metallurgical binding, thus ensure that the intensity of combination.
Summary of the invention:
The object of the present invention is to provide a kind of production equipment and process of copper cover aluminum bimetallic composite wire rod, can realize the short route preparation of copper cover aluminum bimetallic wire, equipment is simple, and energy-conservation, production efficiency is high, is applicable to large gauge suitability for industrialized production.The method that perforation extruding fills core in conjunction with continuous casting not only makes outer field copper pipe have extrusion tissue's structure, and meanwhile, extruding of outer copper pipe, makes the negative pressure formed in pipe, and the situation that efficiently avoid feeding deficiency when forming aluminium core occurs.By the design of extrusion die, outer copper pipe cross sectional shape is no longer by any restriction.Interface between outer copper and aluminium core is firmly metallurgical binding, thus ensure that the intensity of combination.
Equipment of the present invention is watered stopping bar 3, temperature measurer 4, pressure mechanism 5, pressure ram 7, perforated hollow pin 8, recipient 10, extrusion die 11, cooling device 13, tank 14, tension mechanism 15 and winder 16 formed by heating element heater 1, aluminium hydraulic control temperature crucible 2, core metal.Aluminium hydraulic control temperature crucible 2 is embedded in the pressure ram 7 in recipient 10, and aluminium hydraulic control temperature crucible 2 flow export connects with the centre bore of pecker 8.Pecker 8 is connected with pressure ram 7, and extrusion die 11 is arranged on the bottom of recipient 10, and the center of the center of aluminium hydraulic control temperature crucible 2 tap hole, the center of perforated hollow pin 8 and extrusion die 11 nib is on same axis; Heating element heater 1 is equipped with in the outside of recipient 10, and tank 14 is arranged on the bottom of cooling device 13, and tension mechanism 15 is arranged between tank 14 and winder 16.
Technical process of the present invention is for put into recipient 10 by copper base, aluminium ingot puts into temperature control crucible 2, the heating element heater 1 of recipient 10 outside is warmed up to 700-950 DEG C, and insulation 10-200min, under the effect of pressure mechanism 5, pressure ram 7 moves down, carry out perforation extruding to the copper base in recipient 10, form clad copper pipe, extrusion speed is 1 ~ 600mm/min, extrusion ratio is 5 ~ 30, and the cross section of tubing is the odd-shaped cross section of circular, square, star, flat or complexity; When copper pipe extrusion die, that pulls open core metal aluminium liquid waters stopping bar 3, owing to managing the effect of interior negative pressure, aluminium liquid is inhaled in copper pipe and solidifies, by tension mechanism 15 after cooling device 13 and tank 14 cool further, finally, winder 16 carries out curling collection.The extruded velocity of curling gathering speed and extrude tubes product is consistent, and the type of cooling can adopt water-cooled (water-jet velocity is 1-2000mm/s) or air-cooled (wind speed is 1-5000mm/s).
The invention has the advantages that:
1. the temperature control crucible 2 that core metal aluminium liquid is housed is inlaid in pressure ram 7 upper surface, and the flow export of temperature control crucible 2 and the centre bore of pecker 8 are connected to form the cast passage of aluminium liquid; While perforation extruding forms copper pipe, aluminium liquid injects the inside of copper pipe by cast passage, fuses and solidifies, realizing the direct forming of copper cover aluminum bimetallic composite wire rod.Device structure of the present invention is simple, and technological process is short, convenient operation, energy-conserving and environment-protective.
2. the temperature control crucible 2 of aluminium liquid is inlaid in pressure ram 7 upper surface, can realize core metal aluminium liquid and outer layer metal copper in copper cover aluminum bimetallic composite wire rod and heat simultaneously, the quantity of effective minimizing heating element heater and the consumption of the reduction energy.
3. the outer layer metal copper pipe of extruding formation is relative to casting copper pipe, and interior tissue and dimensional accuracy are more intact and accurate, except being shaped except pipe, square tube, and the odd-shaped cross section tubing of the star that also can be shaped pipe, flat tube and complicated shape.
4., after core metal aluminium liquid enters cast passage, can not contact with the air of outside again, not have oxide to generate; The copper pipe inner surface extruded of boring a hole is unsalted surface, does not also contact with the air of outside, can not form oxide.Therefore, the copper cover aluminum interface of acquisition is the compound interface cleaned completely.
5. copper pipe inside when extrusion die that perforation extruding is formed forms negative pressure, along with the length of pipe increases, internal underpressure increases, aluminium liquid can be inhaled into the inside of copper pipe under the effect of negative pressure, form negative pressure casting, improve the performance of the solidified structure of core metal aluminium, eliminate internal flaw during conventional cast, as shrinkage cavity, loose etc.
Accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is a kind of equipment schematic diagram of the present invention.Wherein, heating element heater 1, core metal temperature control crucible 2, core metal waters stopping bar 3, temperature measurer 4, pressure mechanism 5, core metal liquid 6, pressure ram 7, perforated hollow pin 8, clad metal 9, recipient 10, extrusion die 11, core metal solid liquid interface 12, cooling device 13, tank 14, tension mechanism 15, winder 16.
Detailed description of the invention:
Fig. 1 is a kind of detailed description of the invention of present device.Its equipment by pressure mechanism 5, recipient 10, pressure ram 7, extrusion die 11, clad metal 9, perforated hollow pin 8, heating element heater 1 and temperature measurer 4 form outer layer metal copper pipe extrusion system; Temperature control crucible 2, core metal waters stopping bar 3, perforated hollow pin 8, heating element heater 1, temperature measurer 4, and cooling device 13 and tank 14 form the casting solidification system of core metal aluminium liquid; The gathering system of product is made up of tension mechanism 15 and winder 16.Heating element heater 1 adopts resistance heated or induction heating mode.Temperature control crucible 2 and water stopping bar 3 and adopt refractory material or cermet.Recipient 10, pressure ram 7, extrusion die 11 and perforated hollow pin 8 adopt hot die steel.Cooling device 13 adopts water-cooled or air cooling way.Pressure mechanism 5 adopts common forcing press or special extruder.
Forming technology embodiment 1: the diameter 10mm of copper cover aluminum bimetallic composite wire rod, clad copper metal thickness 2mm.Temperature measurer 4 adopts thermocouple direct temperature measurement; Heating element heater 1 adopts resistance wire directly to heat.Temperature control crucible 2 and water stopping bar 3 and adopt corundum to make.Cooling device 13 adopts water-cooled, water-jet velocity 1000mm/s; Pressure mechanism 5 adopts common forcing press.The temperature of core metal temperature control crucible 2 controls at 900 DEG C, insulation 60min.Extrusion ratio is 20, and perforation extrusion speed is 300mm/min, when copper pipe extrusion die, opens and waters stopping bar 3, open cooling device 13; Open tension mechanism 15, regulate the speed of rolling consistent with the speed that product is extruded, obtain appearance and size accurate, interface cohesion is good, the inner copper cover aluminum bimetallic composite wire rod without obvious cast sturcture defect.
Forming technology embodiment 2: the diameter 5mm of copper cover aluminum bimetallic composite wire rod, clad copper metal thickness 1mm.Temperature measurer 4 adopts thermocouple direct temperature measurement; Heating element heater 1 adopts eddy-current heating.Temperature control crucible 2 and water stopping bar 3 and adopt refractory material to make.Cooling device 13 adopts air-cooled, wind speed 3000mm/s; Pressure mechanism 5 adopts common forcing press.The temperature of core metal temperature control crucible 2 controls at 950 DEG C, insulation 120min.Extrusion ratio is 30, and perforation extrusion speed is 100mm/min, when copper pipe extrusion die, opens and waters stopping bar 3, open cooling device 13; Open tension mechanism 15, regulate the speed of rolling consistent with the speed that product is extruded, obtain appearance and size accurate, interface cohesion is good, the inner copper cover aluminum bimetallic composite wire rod without obvious cast sturcture defect.

Claims (6)

1. a copper cover aluminum bimetallic composite wire rod former, is watered stopping bar (3), temperature measurer (4), pressure mechanism (5), pressure ram (7), perforated hollow pin (8), recipient (10), extrusion die (11), cooling device (13), tank (14), tension mechanism (15) and winder (16) formed by heating element heater (1), aluminium hydraulic control temperature crucible (2), core metal; It is characterized in that: aluminium hydraulic control temperature crucible (2) is embedded in the pressure ram (7) in recipient (10), aluminium hydraulic control temperature crucible (2) flow export connects with the centre bore of perforated hollow pin (8), perforated hollow pin (8) is connected with pressure ram (7), extrusion die (11) is arranged on the bottom of recipient (10), and the center of the center of aluminium hydraulic control temperature crucible (2) tap hole, the center of perforated hollow pin (8) and extrusion die (11) nib is on same axis; Heating element heater (1) is equipped with in the outside of recipient (10), tank (14) is arranged on the bottom of cooling device (13), and tension mechanism (15) is arranged between tank (14) and winder (16).
2. the technique with equipment forming copper cladding aluminum bimetallic composite wire rod described in claim 1, it is characterized in that: copper base is put into recipient (10), aluminium ingot puts into temperature control crucible (2), after the outside heating element heater (1) of recipient (10) is warmed up to assigned temperature, insulation, under the effect of pressure mechanism (5), pressure ram (7) moves down, perforation extruding is carried out to the copper base in recipient (10), forms clad copper pipe; When copper pipe extrusion die, that pulls open core metal aluminium liquid waters stopping bar (3), owing to managing the effect of interior negative pressure, aluminium liquid is inhaled in copper pipe and solidifies, by tension mechanism (15) after cooling device (13) and tank (14) cool further, finally, winder (16) carries out curling collection.
3. the technique of forming copper cladding aluminum bimetallic composite wire rod according to claim 2, is characterized in that heating element heater (1) is warmed up to 700-950 DEG C, insulation 10-200min.
4. the technique of forming copper cladding aluminum bimetallic composite wire rod according to claim 2, it is characterized in that the extrusion speed of copper pipe is 1 ~ 600mm/min, extrusion ratio is 5 ~ 30, and the cross section of tubing is the odd-shaped cross section of circular, square, star, flat or complexity.
5. the technique of forming copper cladding aluminum bimetallic composite wire rod according to claim 2, it is characterized in that the type of cooling can adopt water-cooled or air-cooled, during water-cooled, water-jet velocity is 1-2000mm/s, and time air-cooled, wind speed is 1-5000mm/s.
6. the technique of forming copper cladding aluminum bimetallic composite wire rod according to claim 2, is characterized in that the extruded velocity of curling gathering speed and extrude tubes product is consistent.
CN201410289005.0A 2014-06-25 2014-06-25 A kind of production equipment and process of copper cover aluminum bimetallic composite wire rod CN104138922B (en)

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CN104493113B (en) * 2014-11-27 2016-08-24 北京科技大学 A kind of long carbon fiber and metal composite continuous casting installation for casting and technique
CN105689425B (en) * 2016-01-28 2017-11-14 广东省材料与加工研究所 A kind of building mortion and method of metallic cover wire rod
CN106785771B (en) * 2016-12-28 2019-05-10 菏泽海诺知识产权服务有限公司 A kind of seamless V-type trolley producing device and its copper strips unwinding device
CN107931346A (en) * 2017-12-26 2018-04-20 徐州安诚矿山设备有限公司 A kind of new and effective extruder
CN109909479A (en) * 2018-12-27 2019-06-21 北京科技大学 A kind of bimetallic composite wire material short flow process
CN109482833B (en) * 2019-01-08 2020-12-08 重庆市润金新材料研究院有限公司 Bonding gold wire continuous casting furnace

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JPS611449A (en) * 1984-06-14 1986-01-07 Sumitomo Electric Ind Ltd Method and device for producing continuously composite material
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JPS61229441A (en) * 1985-04-04 1986-10-13 Nippon Steel Corp Continuous casting method for preventing cavity in central part
CN1084439A (en) * 1993-08-12 1994-03-30 冶金工业部钢铁研究总院 Continuous casting process of subminiature section casting blank
EP0989918B1 (en) * 1997-06-12 2001-12-19 Sollac S.A. Ingot mould head for continuous vertical load casting of elongated flat metal products
JP2012040591A (en) * 2010-08-19 2012-03-01 Olympus Corp Method and apparatus for manufacturing linear member

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60127057A (en) * 1983-12-12 1985-07-06 Tanaka Denshi Kogyo Kk Continuous casting device
JPS611449A (en) * 1984-06-14 1986-01-07 Sumitomo Electric Ind Ltd Method and device for producing continuously composite material
JPS61195738A (en) * 1985-02-25 1986-08-30 Furukawa Electric Co Ltd:The Production of composite material for compound superconductive wire
JPS61229441A (en) * 1985-04-04 1986-10-13 Nippon Steel Corp Continuous casting method for preventing cavity in central part
CN1084439A (en) * 1993-08-12 1994-03-30 冶金工业部钢铁研究总院 Continuous casting process of subminiature section casting blank
EP0989918B1 (en) * 1997-06-12 2001-12-19 Sollac S.A. Ingot mould head for continuous vertical load casting of elongated flat metal products
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