CN105149531A - Device and technical method for preparing metal-wrapped long carbon fiber wrapping material - Google Patents
Device and technical method for preparing metal-wrapped long carbon fiber wrapping material Download PDFInfo
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- CN105149531A CN105149531A CN201510629875.2A CN201510629875A CN105149531A CN 105149531 A CN105149531 A CN 105149531A CN 201510629875 A CN201510629875 A CN 201510629875A CN 105149531 A CN105149531 A CN 105149531A
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Abstract
The invention belongs to the field of metal wrapping materials and relates to a device and technical method for preparing a metal-wrapped long carbon fiber wrapping material. The device is composed of a water cooler, a high-temperature drawing die, thermal-insulation anti-oxidation slag, a metal melting crucible, a long carbon fiber preheating mould, a thermal-insulation sealing pad and an anti-oxidation cover. A central hole of the thermal-insulation sealing pad is in a round shape or a similar round shape and is matched with the shape of the section of a long carbon fiber, the lower portion of the long carbon fiber preheating mould is arranged in the anti-oxidation cover, and fluid metal in the metal melting crucible can flow into the gap between the central hole of the preheating mould and the long carbon fiber; the liquid metal gradually solidifies in the preheating mould, and the long carbon fiber is wrapped in the metal; and then the liquid metal penetrates through the crucible at the certain speed from bottom to top, the liquid metal contacts liquid metal in the crucible to solidify reversely, and finally the finished metal-wrapped long carbon fiber wrapping material which is good in combination and accurate in size is obtained through the high-temperature drawing die. The wrapping material is short in producing flow, high in interface combining strength, high in yield and low in cost. Furthermore, the metal can be fully combined with the long carbon fiber.
Description
Technical field
The invention belongs to metal clad material field, relate to the drawing of a kind of reverse solidification high temperature and prepare metal bag long carbon fiber clad material equipment and technology.
Background technology
The composite such as copper cover aluminum, silver-colored alclad is the double metallic composite material of coated copper (or silver) layer concentric on aluminium core, be mainly used in high frequency electric transmission conductor, according to " Kelvin effect " principle, the electric current of high frequency only concentrates on the metal levels such as the copper (silver) of conductive surface and transmits, so metal composite conductor has identical transmission performance with simple metal conductor, but metal composite conductor weight is light, cost is low, therefore metal composite conductor has larger development prospect.
With the copper (silver, aluminium etc.) of thin-walled, although control is very economical for composite conductor, its tensile strength is low, easily produces cracking when cable bears tensile force time, affects the transmission of electric current.Although the more copper cover aluminum composite conductor of such as current research significantly reduces conductor weight, has saved cost, but because the tensile strength of aluminium is lower than copper, so the tensile strength of copper cover aluminum composite conductor is lower than copper conductor, in many occasions, because tensile strength is inadequate, limits it and apply.
Tensile strength due to long carbon fiber is the highest (being about 7000MPa), the tensile strength of fine copper is only 150MPa, the tensile strength of fine aluminium is lower is 59MPa, and long carbon fiber density is less, so by filling a branch of long carbon fiber in metal inside, the tensile strength of metal can be significantly improved, weight reduction.Therefore, the preparation of metal bag long carbon fiber clad material has important using value, for promoting the use of of the metal composite conductors such as copper cover aluminum has important promotion meaning.
There is no relevant report prepared by metal bag long carbon fiber clad material at present, the method of traditional mode of production clad metal composite has the methods such as plating, rolling and clad welded, and its common drawback is: it is large that complex process, production efficiency are low, interface quality controls difficulty.
Reverse solidification technique is a kind of nearly end form strip continuous casting technology with unique concept that German Mannesmann group and Aachen technology university developed jointly in 1989, can be used for production solidification layer and master tape same material, compared with the Explosion composite extensively adopted at present, Rolling compund technology, there is the feature of high efficiency, low energy consumption, serialization and short route, therefore namely cause concern once proposition.The principle of reverse solidification technique is, using certain thickness hot rolling or cold-rolled strip as master tape, low temperature master tape with certain speed from bottom to top through the molten steel of certain altitude in coagulator; Molten steel, in two surface solidification growths of low temperature master tape, forms Newly born phase solidification layer (being called for short cenotype layer); When leaving coagulator molten steel surface, cenotype layer and master tape combine securely, are formed and are several times as much as former strip thickness Cast Strip.But also do not adopt correlative study and the report of this explained hereafter metal bag long carbon fiber clad material at present, therefore, the present invention, compared with existing technology before the applying date, has outstanding substantive distinguishing features and significant progress.
Summary of the invention
The technical problem to be solved in the present invention overcomes that the production procedure existed in existing clad material preparation method is long, interface bond strength is low, lumber recovery is low, high in cost of production problem, provides a kind of short route, high efficiency, a kind of metal bag long carbon fiber composite reverse solidification high temperature drawing Preparation equipment that energy-saving and cost-reducing, compound interface is combined and technique.
The present invention relates to a kind of device preparing the drawing of metal bag long carbon fiber clad material high temperature, it is characterized in that: comprise draw-gear, locating chucking tools, water cooler, high temperature drawing die, thermocouple, the anti-oxidation slag of insulation, molten metal, molten metallic crucible, the pre-hot-die of long carbon fiber, heat insulation sealing gasket one, anti-oxidation cover, heat insulation sealing gasket two; Inert gas air inlet, inert gas gas outlet, long carbon fiber and introducing device.The molten anti-oxidation slag of metallic crucible opening part covering and heat insulating, the thermocouple measuring molten metal temperature is equipped with on crucible top; The upper end of the pre-hot-die of long carbon fiber is through inserting in molten metal bottom molten metallic crucible, together with crucible bottom closely to be connected firmly with anti-oxidation cover by heat insulation sealing gasket, heat insulation sealing gasket is equipped with in pre-hot-die lower end, the molten anti-oxidation slag of metallic crucible opening part covering and heat insulating, the thermocouple measuring molten metal temperature is equipped with on crucible top; The upper end of the pre-hot-die of long carbon fiber is through inserting in molten metal bottom molten metallic crucible, together with closely being connected firmly with anti-oxidation cover by heat insulation sealing gasket bottom molten metallic crucible, heat insulation sealing gasket is equipped with in pre-hot-die lower end, molten metallic crucible upper end center position is pressed close to molten metal high temperature drawing die is housed, drawing die upper end is furnished with water cooler, and locating chucking tools and draw-gear are equipped with in the top of water cooler.
The center hole shape of heat insulation sealing gasket is circular or subcircular, matches, prevents the heat loss in pre-hot-die on the one hand, prevent molten metal in crucible from flowing out through pre-hot-die on the other hand with long carbon fiber cross sectional shape, the bottom of the pre-hot-die of long carbon fiber is arranged in anti-oxidation cover, and the inside is connected with inert gas, prevents in long carbon fiber warm oxidized, long carbon fiber is after pre-hot-die is preheating to uniform temperature, molten metal in molten metallic crucible flows in the gap of preheating mould centre bore and long carbon fiber, because pre-hot-die temperature is lower than molten metal fusing point, the liquid metal temperature on long carbon fiber surface reduces rapidly, along with the infiltration of liquid metal on long carbon fiber surface, attachment, condensation, realize the good metallurgical binding of metal and long carbon fiber interface, molten metal solidifies gradually in pre-hot-die, long carbon fiber is coated on metal inside, then from bottom to top crucible is passed with certain speed, contact with the molten metal of melting in crucible, the hot-fluid between solid-state clad material and molten metal formed in pre-hot-die is relied on to transmit, reverse solidification obtains the coated blank of metal bag long carbon fiber of certain coating thickness, the coated blank just having left molten metal surface is in the condition of high temperature, now high temperature drawing die is easier to its tube reducing and improve blank surface quality, finally obtain combining well, accurate in size metal bag long carbon fiber clad material finished product.
Long carbon fiber pre-hot-die temperature be corresponding clad metal liquidus temperature below the scope of 200 ~ 600 DEG C, molten metallic crucible temperature is set as the scope of more than the liquidus curve of corresponding clad metal to liquidus curve 200 DEG C, the speed of service of long carbon fiber is 0 ~ 3m/min, and in water cooler, water velocity controls at 3 ~ 12m/s.
Described molten metal is aluminium liquid, silvering solution, copper liquid.
The invention has the advantages that:
1, a kind of metal of good control and long carbon fiber Interface composites effect, the speed of long carbon fiber through molten metal can be controlled accurately in the process of compound, ensure that molten metal and the sufficient haptoreaction of long carbon fiber, along with the infiltration of liquid metal on long carbon fiber surface, attachment, condensation, realize controlling the good metallurgical binding of a kind of metal and long carbon fiber interface.
2, dimensional accuracy is high, and a kind of metal bag long carbon fiber clad material can carry out high temperature drawing tube reducing timely, and high temperature drawing die plays key effect to control clad material dimensional accuracy is high.
3, efficiency is high, and coated with long carbon fiber and the coated aft-loaded airfoil of a kind of metal of easy effective implemention is configured as the integrated of product.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of metal bag long carbon fiber clad material reverse solidification high temperature drawing Preparation equipment and technique.
1) draw-gear; (2) locating chucking tools; (3) water cooler; (4) metal bag long carbon fiber clad material finished product; (5) high temperature drawing die; (6) thermocouple; (7) anti-oxidation slag is incubated; (8) molten metal; (9) molten metallic crucible; (10) the pre-hot-die of long carbon fiber; (11) heat insulation sealing gasket one; (12) anti-oxidation cover; (13) heat insulation sealing gasket two; (14) inert gas air inlet; (15) inert gas gas outlet; (16) long carbon fiber and introducing device.
Detailed description of the invention
Below with reference to specific embodiment the present invention done and describe in detail further.
Embodiment 1
Prepared by the drawing of copper-clad long carbon fiber clad material reverse solidification high temperature
Copper-clad bag long carbon fiber clad material outer layer metal diameter 12mm, core long carbon fiber beam diameter is 3mm, electromagnetic induction heating mode is adopted to heat molten metallic crucible, the temperature of copper molten metal is 1200 DEG C, the temperature of the pre-hot-die of long carbon fiber is 800 DEG C, mode of heating adopts resistance heated, the speed of service of long carbon fiber is 1.2m/min, water velocity in water cooler is 8m/s, the coated blank of copper-clad long carbon fiber improves through the tube reducing of high temperature drawing die and surface quality, obtains metallurgical binding good, accurate in size copper-clad long carbon fiber clad material finished product.
Embodiment 2
Prepared by the drawing of aluminium bag long carbon fiber clad material reverse solidification high temperature
Aluminium handbag long carbon fiber clad material outer layer metal diameter 14mm, core long carbon fiber beam diameter is 2mm, electromagnetic induction heating mode is adopted to heat molten metallic crucible, the temperature of aluminum metal liquid is 750 DEG C, the temperature of the pre-hot-die of long carbon fiber is 300 DEG C, mode of heating adopts resistance heated, the speed of service of long carbon fiber is 0.8m/min, water velocity in water cooler is 6m/s, the coated blank of aluminium bag long carbon fiber improves through the tube reducing of high temperature drawing die and surface quality, obtains metallurgical binding good, accurate in size aluminium bag long carbon fiber clad material finished product.
Embodiment 3
Silver bag long carbon fiber clad material reverse solidification high temperature drawing preparation
Silver handbag long carbon fiber clad material outer layer metal diameter 10mm, core long carbon fiber beam diameter is 4mm, electromagnetic induction heating mode is adopted to heat molten metallic crucible, the temperature of silver metal liquid is 1100 DEG C, the temperature of the pre-hot-die of long carbon fiber is 600 DEG C, mode of heating adopts resistance heated, the speed of service of long carbon fiber is 1.0m/min, water velocity in water cooler is 8m/s, silver bag long carbon fiber coated blank improves through the tube reducing of high temperature drawing die and surface quality, obtains good, the accurate in size silver-colored bag long carbon fiber clad material finished product of metallurgical binding.
Claims (5)
1. prepare a device for metal bag long carbon fiber clad material, it is characterized in that: comprise draw-gear (1), locating chucking tools (2), water cooler (3), high temperature drawing die (5), thermocouple (6), be incubated anti-oxidation slag (7), molten metal (8), molten metallic crucible (9), the pre-hot-die of long carbon fiber (10), heat insulation sealing gasket one (11), anti-oxidation cover (12), heat insulation sealing gasket two (13); Inert gas air inlet (14), inert gas gas outlet (15), long carbon fiber and introducing device (16); The molten anti-oxidation slag of metallic crucible (9) opening part covering and heat insulating (7), the thermocouple (6) measuring molten metal (8) temperature is equipped with on crucible top; The upper end of the pre-hot-die of long carbon fiber (10) is inserted in molten metal through molten metallic crucible (9) bottom, together with closely being connected firmly with anti-oxidation cover (12) by heat insulation sealing gasket one (11) bottom molten metallic crucible, heat insulation sealing gasket two (13) is equipped with in pre-hot-die lower end, molten metallic crucible upper end center position is pressed close to molten metal high temperature drawing die (5) is housed, drawing die upper end is furnished with water cooler (3), and locating chucking tools (2) and draw-gear (1) are equipped with in the top of water cooler.
2. adopt device according to claim 1 to prepare the process of metal bag long carbon fiber clad material, it is characterized in that: the center hole shape of heat insulation sealing gasket is circular or subcircular, matches with long carbon fiber cross sectional shape, the bottom of the pre-hot-die of long carbon fiber is arranged in anti-oxidation cover, long carbon fiber is after pre-hot-die is preheating to uniform temperature, molten metal in molten metallic crucible flows in the gap of preheating mould centre bore and long carbon fiber, because pre-hot-die temperature is lower than molten metal fusing point, the liquid metal temperature on long carbon fiber surface reduces rapidly, along with the infiltration of liquid metal on long carbon fiber surface, attachment, condensation, realize the good metallurgical binding of metal and long carbon fiber interface, molten metal solidifies gradually in pre-hot-die, long carbon fiber is coated on metal inside, then from bottom to top crucible is passed with certain speed, contact with the molten metal of melting in crucible, the hot-fluid between solid-state clad material and molten metal formed in pre-hot-die is relied on to transmit, reverse solidification obtains the coated blank of metal bag long carbon fiber of certain coating thickness, the coated blank just having left molten metal surface is in the condition of high temperature, now high temperature drawing die is easier to its tube reducing and improve blank surface quality, finally obtain combining well, accurate in size metal bag long carbon fiber clad material finished product.
3. the process preparing metal bag long carbon fiber clad material according to claim 2, it is characterized in that: the pre-hot-die of long carbon fiber (10) temperature be corresponding clad metal liquidus temperature below the scope of 200 ~ 600 DEG C, molten metallic crucible (9) temperature is set as the scope of more than the liquidus curve of corresponding clad metal to liquidus curve 200 DEG C, the speed of service of long carbon fiber is 0 ~ 3m/min, and in water cooler (3), water velocity controls at 3 ~ 12m/s.
4. the process preparing metal bag long carbon fiber clad material according to claim 2, is characterized in that: molten metal is aluminium liquid, silvering solution, copper liquid.
5. the process preparing metal bag long carbon fiber clad material according to claim 2, is characterized in that: be connected with inert gas in anti-oxidation cover, prevents in long carbon fiber warm oxidized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510629875.2A CN105149531B (en) | 2015-09-29 | 2015-09-29 | A kind of device and process for preparing metal bag long carbon fiber covering material |
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| CN201510629875.2A CN105149531B (en) | 2015-09-29 | 2015-09-29 | A kind of device and process for preparing metal bag long carbon fiber covering material |
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| CN105149531B CN105149531B (en) | 2017-07-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694836A (en) * | 2017-04-06 | 2017-05-24 | 江西理工大学 | Continuous casting forming device and method for solid-liquid wrapping composite material |
| CN107268132A (en) * | 2017-06-29 | 2017-10-20 | 长沙理工大学 | A kind of glass fluxing technique wire production equipment and process |
| CN107815620A (en) * | 2017-10-27 | 2018-03-20 | 北京科技大学 | One kind adds the deformable composite wire of spiral long fiber reinforcement Metal Substrate |
| CN109202043A (en) * | 2018-09-18 | 2019-01-15 | 北京科技大学 | A kind of preparation method of copper clad aluminum and coiled carbon fibers composite bar |
| CN110523955A (en) * | 2019-07-11 | 2019-12-03 | 江苏长龄液压股份有限公司 | A kind of blank of spring and processing tool and processing technology |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220251A (en) * | 1983-05-31 | 1984-12-11 | Nissan Motor Co Ltd | Production of fiber reinforced composite material |
| CN1031807A (en) * | 1987-09-05 | 1989-03-22 | 上海电机锻造厂 | The crystallizer of used in up-pulling method for continuously casting metallic pipe and technology |
| US5049419A (en) * | 1989-05-18 | 1991-09-17 | Toray Industries, Inc. | Method for manufacturing a precursor wire for a carbon-fiber-reinforced metal composite material |
| EP1112792A2 (en) * | 1999-12-27 | 2001-07-04 | Silvana Lastrucci | Machine for continuous upward casting |
| CN102581236A (en) * | 2012-04-06 | 2012-07-18 | 北京科技大学 | Pressure core-filling continuous casting equipment and process for double-metal-bag long carbon fiber composite material |
| CN104384212A (en) * | 2014-11-27 | 2015-03-04 | 北京科技大学 | Preparation method of metal and carbon fiber composite wire rod |
| CN104493113A (en) * | 2014-11-27 | 2015-04-08 | 北京科技大学 | Long carbon fiber and metal composite continuous casting machine and process |
-
2015
- 2015-09-29 CN CN201510629875.2A patent/CN105149531B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220251A (en) * | 1983-05-31 | 1984-12-11 | Nissan Motor Co Ltd | Production of fiber reinforced composite material |
| CN1031807A (en) * | 1987-09-05 | 1989-03-22 | 上海电机锻造厂 | The crystallizer of used in up-pulling method for continuously casting metallic pipe and technology |
| US5049419A (en) * | 1989-05-18 | 1991-09-17 | Toray Industries, Inc. | Method for manufacturing a precursor wire for a carbon-fiber-reinforced metal composite material |
| EP1112792A2 (en) * | 1999-12-27 | 2001-07-04 | Silvana Lastrucci | Machine for continuous upward casting |
| CN102581236A (en) * | 2012-04-06 | 2012-07-18 | 北京科技大学 | Pressure core-filling continuous casting equipment and process for double-metal-bag long carbon fiber composite material |
| CN104384212A (en) * | 2014-11-27 | 2015-03-04 | 北京科技大学 | Preparation method of metal and carbon fiber composite wire rod |
| CN104493113A (en) * | 2014-11-27 | 2015-04-08 | 北京科技大学 | Long carbon fiber and metal composite continuous casting machine and process |
Non-Patent Citations (2)
| Title |
|---|
| 肖恩奎等: "《铜及铜合金熔炼与铸造技术》", 30 September 2007, 冶金工业出版社 * |
| 赵万花: "《重有色金属及其合金线材生产》", 30 June 2013, 冶金工业出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694836A (en) * | 2017-04-06 | 2017-05-24 | 江西理工大学 | Continuous casting forming device and method for solid-liquid wrapping composite material |
| CN107268132A (en) * | 2017-06-29 | 2017-10-20 | 长沙理工大学 | A kind of glass fluxing technique wire production equipment and process |
| CN107268132B (en) * | 2017-06-29 | 2020-06-26 | 长沙理工大学 | Glass-coated metal wire production equipment and process |
| CN107815620A (en) * | 2017-10-27 | 2018-03-20 | 北京科技大学 | One kind adds the deformable composite wire of spiral long fiber reinforcement Metal Substrate |
| CN107815620B (en) * | 2017-10-27 | 2019-06-25 | 北京科技大学 | A kind of deformable composite wire of addition spiral long fiber reinforcement Metal Substrate |
| CN109202043A (en) * | 2018-09-18 | 2019-01-15 | 北京科技大学 | A kind of preparation method of copper clad aluminum and coiled carbon fibers composite bar |
| CN110523955A (en) * | 2019-07-11 | 2019-12-03 | 江苏长龄液压股份有限公司 | A kind of blank of spring and processing tool and processing technology |
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| CN105149531B (en) | 2017-07-28 |
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