CN106067332A - A kind of high-performance copper-coated aluminium composite material special type forming and machining method - Google Patents
A kind of high-performance copper-coated aluminium composite material special type forming and machining method Download PDFInfo
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- CN106067332A CN106067332A CN201610484177.2A CN201610484177A CN106067332A CN 106067332 A CN106067332 A CN 106067332A CN 201610484177 A CN201610484177 A CN 201610484177A CN 106067332 A CN106067332 A CN 106067332A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/02—Single bars, rods, wires, or strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/042—Manufacture of coated wire or bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/045—Manufacture of wire or bars with particular section or properties
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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Abstract
The invention belongs to layered metal composite material preparation and forming field, relate to a kind of high-performance copper-coated aluminium composite material special type forming and machining method, the rectangular cross section copper cover aluminum composite bar that the method uses continuous casting direct combination forming technology to prepare is blank, and the production process interface of blank is pollution-free, bond strength is high.Use non-homogeneous quick sensing to heat, the temperature of a little higher than core metal of temperature of blank clad metal can be made, so that the resistance of deformation of clad metal and core metal is more nearly, be conducive to improving the compatibility of deformation of two kinds of metals.Shaping with blank being carried out heating warm-rolling, the deformability of copper and aluminum can be improved, be conducive to carrying out continuous large deformation, improving the efficiency that the flat row of big cross section produces.Use extraordinary groove rolling, strengthen the processing to copper cover aluminum composite blank side, be conducive to improving compatibility of deformation, improve product lumber recovery and the interfacial combined function of product.Production method provided by the present invention is without environmental pressure, energy-conserving and environment-protective.
Description
Technical field
The invention belongs to layered metal composite material preparation and forming field, especially relate to a kind of high-performance the most disconnected
The special rolling forming and machining method of face copper-clad aluminum composite flat row.
Background technology
High performance double metal laminar composite is in the field extensive application such as electric, oil, Aero-Space.Such as,
The copper-clad aluminum composite flat of rectangle big cross section is arranged owing to combining the low close of the good electric conductivity of fine copper, switching performance and fine aluminium
The advantages such as degree, low cost, can big electric current transmission field such as bus mains system, electrical power trans mission/distribution system, low-voltage complete switch equipment,
The industries such as control equipment replace fine copper busbar.
The preparation processing method of the copper-clad aluminum composite flat row disclosing report mainly has following several:
First method uses aluminium bar and the copper pipe that matches with aluminium bar outside dimension, through drawing or Rolling compund, last drawing
Become required overall dimensions single copper clad aluminum wire (see Wu Yunzhong. method for producing copper clad aluminum busbars. Chinese invention patent,
200710011265 .1).This method also exists and has a problem in that: one, owing to aluminium bar and copper pipe must use matched in clearance ability
It is assembled together, and the processing that gap is later is difficult to be completely eliminated, so being difficult to avoid in use producing gap
Electric discharge corrosion, properties of product are difficult to ensure that；Its two, owing to the glacing flatness of copper pipe with aluminum pipe is difficult to ensure that, produce longer
Cuprum-cladding-aluminium bus array is relatively difficult；Its three, owing to copper pipe inner surface and aluminum wicking surface needing to carry out before compound the cleaning of complexity
Operation, and be difficulty with producing continuously, so production efficiency is low, and production cost height (see: Hu Jie, cuprum-cladding-aluminium composite wire hydrostatic
Extrusion-processing technology is studied, New Technologies, and 2001,9:27-28).
Second method is hydrostatic extrusion method.Hydrostatic extrusion method can be used for producing square, rectangle, tubular and cross sectional shape
Increasingly complex copper-coated aluminium composite material (see: thank build new etc., materials processing new technique and new technology, metallurgical industry publishing house,
2004,263-268；Hu Jie, cuprum-cladding-aluminium composite wire hydrostatic extrusion Research on processing technology, New Technologies, 2001,9:27-
28).The advantage of hydrostatic extrusion method is: the resisting medium in recipient significantly reduces between blank and recipient and mould
Frictional force, substantially improves the uniformity of metal flow.The major defect of hydrostatic extrusion method is: (1) shapes noncircular cross section
Bimetallic coating material time need to by clad metal and core metal preprocessing be size with the tubing of mould precise match and
Bar, and both are carried out the process of a series of surfaces, with ensure compound before " cleaning " interface, technological process longer (see: recklessly
Prompt. cuprum-cladding-aluminium composite wire hydrostatic extrusion Research on processing technology, New Technologies, 2001,9:27-28)；(2) hydrostatic extrusion
The equipment of technique is complicated, equipment investment is big；(3) the unproductive off time of hydrostatic extrusion method is long, and production efficiency is low.
The third method first use horizontal casting direct combination forming process (see: thank build new etc. a kind of coating material level is even
Casting direct combination former and technique. Chinese patent: ZL200610112817.3.) etc. technique prepare the copper of circular cross section
Alclad composite, prepares the copper-clad aluminum laminated busbar of rectangular cross section (see Xie Jianxin by techniques such as rolling, drawings the most again
Deng. a kind of high-performance cooper-coated aluminum rectangle section compound conductive bus row and preparation technology thereof. Chinese patent:
ZL200810057668.4).This method uses horizontal casting direct combination forming process to prepare circular cross section copper cover aluminum blank, can
The problem avoiding blank preform and surface to process, improves production efficiency, shortens technological process, and continuous casting is combined and belongs to
Being combined in solid-liquid, copper and two kinds of metals of aluminum can form the interface of metallurgical binding in interface, and interface bond strength is high (see Wu Yong
Good fortune etc., continuous casting direct forming rectangular cross section copper-coated aluminium composite material interface and the change in the operation of rolling, China YouSe metal
Journal, 2013,23 (1): 191-200), the production for high-performance copper-clad aluminum composite flat row provides brand-new approach.But due to
The machining deformation difference of ability of copper and aluminum is relatively big, circular cross section blank be processed into flat section flat during easily owing to becoming
Shape inharmonious and produce the defect such as edge crack, Interface Cracking, reduce the lumber recovery of product；Especially as the flat row of copper cover aluminum
Cross dimensions bring three subject matters when becoming big, one is owing to flat row's cross dimensions becomes big, needs the copper cover aluminum base used
The size of material also becomes big, and the machining deformation amount when copper cover aluminum blank is processed into flat row is bigger, existing uses cold rolling adding completely
The method of work, it is difficult to meet the requirement that deflection is significantly increased；Two is due to copper, two kinds of metal at room temperature plastic deformation abilities of aluminum
The copper-coated aluminium composite material that power is different and causes deformation problem (two kinds of metal flow present in the roll form process
The bigger problem of gaps between their growth rates) more prominent, so that problems such as the edge cracks in the Copper strip course of processing
More serious；Three is the existing technique only with flat rolling, and during rolling deformation, side is in free deformation, also
It is easily caused deformation, forms higher side additional potential stress, cause the defects such as edge cracks, it is difficult to carry out large deformation
Amount rolling processing.Therefore, copper, the deformability of aluminum and compatibility of deformation in big cross section copper-clad aluminium bar base roll forming how are improved
Property, solve big cross section copper cover aluminum blank and shape a difficult problem, become the lumber recovery improving high-performance copper alclad flat row production,
Reduce the key of product integrated cost.
Summary of the invention
The present invention is directed to deficiency and a difficult problem for existing copper-clad aluminum composite flat row's production technology, it is provided that a kind of employing continuous casting is direct
High-quality rectangular cross section copper cover aluminum composite bar prepared by combined forming process is rolling blank, uses non-homogeneous quick sensing to add
Blank is preheated by hot mode, then uses multi-pass special type groove rolling processing, produces big finally by drawing setting
The method of the flat row of section high-performance copper alclad, the present invention is by using rectangular cross section copper cover aluminum continuous casting material, disconnected with using circle
Face blank is compared, and more meets shape principle of similarity when being processed into flat scheduling product, is conducive to the harmony of deformation；By to base
After material preheats, warm-rolling is processed, and compared with cold rolling, can improve the plastic deformation ability of copper and aluminum, be conducive to carrying out large deformation
Amount processing；Utilize the kelvin effect of high-frequency induction heating (i.e. close to the heated temperature of part of blank surface compared with core
High), copper cover aluminum blank is carried out quick high-frequency induction heating, the temperature a little higher than core aluminum of the cladding layers of copper of blank can be made
Temperature, so that being more nearly of the resistance of deformation of clad metal and core metal, is conducive to improving inside and outside copper cover aluminum blank
The compatibility of deformation of layer metal；Groove rolling is used to replace plain-barreled roll, and by special hole type design, when strengthening roll forming
The processing of copper cover aluminum blank side edge, when being conducive to improving rolling deformation, the compatibility of deformation of blank different parts, eliminates side
Additional potential stress, solves limit and splits problem.By above-mentioned measure, the deformability of copper-coated aluminium composite material and compatibility of deformation is made to show
Write increase, product lumber recovery significantly improves, and production cost reduces.
In order to reach object above, the technical scheme is that a kind of high-performance copper-coated aluminium composite material special type shapes
Processing method, specifically includes following steps:
Step 1: the copper cover aluminum composite bar selecting continuous casting direct combination to shape preparation is blank, described copper cover aluminum composite bar
Section configuration is rectangle, and cladding ratio is 20%～35%；
Step 2: the rectangular cross section copper cover aluminum composite bar chosen through step 1 is placed in a sensing turning to rectangular cross section
Heater wire enspheres a mouthful one end, and the exit end at induction coil arranges and quickly responds infrared radiation thermometer, with the surface of measuring stick base
Temperature, the inwall of described coil is 10～40mm with the spacing on the surface of compound bar billet；Start induction heating apparatus, certain
Under heating frequency, Copper strip is driven to pass load coil by described blank heating to necessarily with certain speed
Temperature, standby；
Step 3: the Copper strip after being heated to be rapidly feeding the milling train with special concave roll is carried out many
Passes shapes, and i.e. obtains copper-clad aluminum composite flat row；In order to strengthen the processing to Copper strip side, improve deformation
Harmony, the side gradient of described pass takes the higher limit of conventional pass or than higher limit big 1 °～2 °；
Step 4: copper-clad aluminum composite flat after step 3 is rolled is discharged into row annealing, annealing temperature at 300 ~ 380 DEG C, annealing time
0.5～2.0h；
Step 5: the copper-clad aluminum composite flat after step 4 is annealed is discharged into row drawing setting, to control the finished section chi of product
Very little and surface quality (width tolerance≤± 1.2mm, thickness tolerance≤± 0.2mm, surface roughness value≤1.6 μ
M), i.e. obtaining copper-clad aluminum composite flat and line up product, described copper-clad aluminum composite flat row is hard state.
Further, the method also includes step 6: the copper-clad aluminum composite flat prepared through step 5 is lined up product, annealing temperature
Degree is 200～400 DEG C, and annealing time is 0.5～2.0h, and the copper-clad aluminum composite flat i.e. obtaining soft state lines up product.
Further, the frequency of induction heating apparatus described in described step 2 is 10000～20000Hz；Described copper cover aluminum is multiple
The movement velocity closing rod base is 100～500mm/min；Surface temperature after described Copper strip is heated be 150～
400℃。
Further, every time reduction ratio of the operation of rolling described in described step 3 controls between 15%～40%, under stagnation pressure
Rate controls between 60%～90%, and roll line speed controlling is between 5～30m/min.
Further, described in described step 5, wide drafts during drawing is 0.1～0.2mm, and leptoprosopy drafts is 0.5
～1.0mm.
Copper-clad aluminum composite flat row's production technology that the present invention provides has the advantage that
(1) the rectangular cross section copper cover aluminum composite bar using continuous casting direct combination forming technology to prepare is blank, the production of blank
Process interface is pollution-free, bond strength is high, it is ensured that the copper-clad aluminum composite flat row of final production has excellent interfacial bonding property
Energy and electric conductivity.
(2) use non-homogeneous quick sensing to heat, a little higher than core metal of temperature of blank clad metal can be made
Temperature, so that the resistance of deformation of clad metal and core metal is more nearly, is conducive to improving the deformation association of two kinds of metals
Tonality.
(3) use and carry out blank heating warm-rolling shaping, the deformability of copper and aluminum can be improved, be conducive to carrying out continuously
Large deformation, improves the efficiency that the flat row of big cross section produces.
(4) use extraordinary groove rolling, the processing to copper cover aluminum composite blank side can be strengthened, be conducive to improving deformation
Harmony, improves product lumber recovery and the interfacial combined function of product.
(5) production method provided by the present invention is without environmental pressure, energy-conserving and environment-protective.
Specific implementation method
Below in conjunction with specific embodiment, technical scheme is described further.
Embodiment 1: transverse section width is 80mm, thickness is 10mm, wholecircle limit, hard state copper-clad aluminum composite flat row special rolling
Shape and drawing method for processing.
(1) to select the cross dimensions prepared of continuous casting direct combination forming technology be 80mm × 80mm, cladding ratio is the square of 35%
Shape section copper cover aluminum composite bar is rolling blank；
(2) rectangular cross section copper cover aluminum composite bar is placed in the load coil entrance one end turning to rectangular cross section,
The spacing on the inwall of described coil and the surface of adjacent compound bar billet is 10mm, loop length 150mm；Start feeling should add hot charging
Putting, the frequency of sensing heating is 10000Hz；Drive Copper strip with the speed of 300mm/min through sensing heater wire
Circle, the exit end at induction coil arranges and quickly responds infrared radiation thermometer, the surface temperature of measuring stick base；Copper cover aluminum compound bar
Surface temperature after base is heated is 150 DEG C；
(3) Copper strip being heated to 150 DEG C is rapidly feeding the milling train with special concave roll is carried out many
Passes shapes；The side gradient of pass takes bigger than the higher limit of conventional pass 1 °；The percentage pass reduction of the operation of rolling controls
25%, total reduction controls 80%, and roll line speed controlling is at 10m/min；
(4) to roll rear copper-clad aluminum composite flat discharge into row annealing, annealing temperature is at 300 DEG C, and annealing time is at 0.5h；
(5) copper-clad aluminum composite flat after annealing is discharged into row drawing setting, to control finished section size and the surface matter of product
Amount.Wide face drafts during drawing is at 0.1mm, and leptoprosopy drafts is at 0.5mm.
Embodiment 2: transverse section width is 120mm, thickness is 10mm, fillet, annealed state copper-clad aluminum composite flat row's special type is rolled
Make shape and drawing method for processing.
(1) to select the cross dimensions prepared of continuous casting direct combination forming technology be 120mm × 80mm, cladding ratio is 20%
Rectangular cross section copper cover aluminum composite bar is rolling blank；
(2) rectangular cross section copper cover aluminum composite bar is placed in the load coil entrance one end turning to rectangular cross section,
The spacing on the inwall of described coil and the surface of adjacent compound bar billet is 40mm, loop length 300mm；Start feeling should add hot charging
Putting, the frequency of sensing heating is 20000Hz；Drive Copper strip with the speed of 200mm/min through sensing heater wire
Circle, the exit end at induction coil arranges and quickly responds infrared radiation thermometer, the surface temperature of measuring stick base；Copper cover aluminum compound bar
Surface temperature after base is heated is 400 DEG C；
(3) Copper strip being heated to 400 DEG C is rapidly feeding the milling train with special concave roll is carried out many
Passes shapes；The side gradient of pass takes bigger than the higher limit of conventional pass 2 °；The percentage pass reduction of the operation of rolling controls
About 30%, total reduction controls 85%, and roll line speed controlling is at 5m/min；
(4) to roll rear copper-clad aluminum composite flat discharge into row annealing, annealing temperature is at 380 DEG C, and annealing time is at 2h；
(5) copper-clad aluminum composite flat after annealing is discharged into row drawing setting, to control finished section size and the surface matter of product
Amount.Wide face drafts during drawing is at 0.2mm, and leptoprosopy drafts is at 1.0mm；
(6) copper-clad aluminum composite flat after drawing discharges into row finished products process.Annealing temperature is 400 DEG C, and annealing time is 0.5h.
Embodiment 3: transverse section width is 120mm, thickness is 10mm, fillet, annealed state copper-clad aluminum composite flat row's special type is rolled
Make shape and drawing method for processing.
(1) to select the cross dimensions prepared of continuous casting direct combination forming technology be 120mm × 80mm, cladding ratio is 20%
Rectangular cross section copper cover aluminum composite bar is rolling blank；
(2) rectangular cross section copper cover aluminum composite bar is placed in the load coil entrance one end turning to rectangular cross section,
The spacing on the inwall of described coil and the surface of adjacent compound bar billet is 25mm, loop length 300mm；Start feeling should add hot charging
Putting, the frequency of sensing heating is 15000Hz；Drive Copper strip with the speed of 500mm/min through sensing heater wire
Circle, the exit end at induction coil arranges and quickly responds infrared radiation thermometer, the surface temperature of measuring stick base；Copper cover aluminum compound bar
Surface temperature after base is heated is 300 DEG C；
(3) Copper strip being heated to 300 DEG C is rapidly feeding the milling train with special concave roll is carried out many
Passes shapes；The side gradient of pass takes bigger than the higher limit of conventional pass 1.5 °；The percentage pass reduction control of the operation of rolling
System is 40%, and total reduction controls 90%, and roll line speed controlling is at 30m/min；
(4) to roll rear copper-clad aluminum composite flat discharge into row annealing, annealing temperature is at 320 DEG C, and annealing time is at 1.5h；
(5) copper-clad aluminum composite flat after annealing is discharged into row drawing setting, to control finished section size and the surface matter of product
Amount.Wide face drafts during drawing is at 0.15mm, and leptoprosopy drafts is at 0.75mm；
(6) copper-clad aluminum composite flat after drawing discharges into row finished products process.Annealing temperature is 300 DEG C, and annealing time is 1.5h.
Claims (5)
1. a high-performance copper-coated aluminium composite material special type forming and machining method, it is characterised in that specifically include following steps:
Step 1: the copper cover aluminum composite bar selecting continuous casting direct combination to shape preparation is blank, described copper cover aluminum composite bar
Section configuration is rectangle, and cladding ratio is 20%～35%；
Step 2: the rectangular cross section copper cover aluminum composite bar chosen through step 1 is placed in a sensing turning to rectangular cross section
Heater wire enspheres a mouthful one end, and the exit end at induction coil arranges and quickly responds infrared radiation thermometer, with the surface of measuring stick base
Temperature, the inwall of described coil is 10～40mm with the spacing on the surface of compound bar billet；Start induction heating apparatus, certain
Under heating frequency, Copper strip is driven to pass load coil by described blank heating to necessarily with certain speed
Temperature, standby；
Step 3: the Copper strip after being heated to is rapidly feeding in the milling train with concave roll and carries out multi-pass
Roll forming, i.e. obtains copper-clad aluminum composite flat row；In order to strengthen the processing to Copper strip side, improve compatibility of deformation
Property, the side gradient of described pass takes the higher limit of conventional pass or than higher limit big 1 °～2 °；
Step 4: copper-clad aluminum composite flat after step 3 is rolled is discharged into row annealing, annealing temperature at 300～380 DEG C, annealing time
0.5～2.0h；
Step 5: the copper-clad aluminum composite flat after step 4 is annealed is discharged into row drawing setting, to control the finished section chi of product
Very little and surface quality, width difference≤± 1.2mm, thickness deviation≤± 0.2mm, surface roughness value≤1.6 μm, i.e. obtain copper
Alclad composite flat lines up product, and described copper-clad aluminum composite flat row is hard state.
Method the most according to claim 1, it is characterised in that the method also includes step 6: will prepare through step 5
Copper-clad aluminum composite flat line up product, annealing temperature is 200 ~ 400 DEG C, and annealing time is 0.5～2.0h, i.e. obtains the copper-clad of soft state
Aluminum composite flat lines up product.
Method the most according to claim 1 and 2, it is characterised in that the frequency of induction heating apparatus described in described step 2
It is 10000～20000Hz；The movement velocity of described Copper strip is 100～500mm/min；Described copper cover aluminum is combined
Surface temperature after rod base is heated is 150～400 DEG C.
Method the most according to claim 1 and 2, it is characterised in that every time pressure of the operation of rolling described in described step 3
Lower rate controls between 15%～40%, and total reduction controls between 60% ~ 90%, roll line speed controlling 5～30m/min it
Between.
Method the most according to claim 1 and 2, it is characterised in that wide face drafts during drawing described in described step 5
0.1～0.2mm, leptoprosopy drafts is 0.5～1.0mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941238A (en) * | 2017-05-18 | 2018-12-07 | 艾洛益(杭州)材料科技有限公司 | The continuous preparation process of copper clad aluminium composite bus |
| CN109047368A (en) * | 2018-07-12 | 2018-12-21 | 河北工业大学 | A kind of preparation method of the compound Bar Wire Product of aluminium packet magnesium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108941238A (en) * | 2017-05-18 | 2018-12-07 | 艾洛益(杭州)材料科技有限公司 | The continuous preparation process of copper clad aluminium composite bus |
| CN109047368A (en) * | 2018-07-12 | 2018-12-21 | 河北工业大学 | A kind of preparation method of the compound Bar Wire Product of aluminium packet magnesium |
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