CN106670257A - Production equipment for zinc-aluminum composite wires and production method thereof - Google Patents
Production equipment for zinc-aluminum composite wires and production method thereof Download PDFInfo
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- CN106670257A CN106670257A CN201710013289.4A CN201710013289A CN106670257A CN 106670257 A CN106670257 A CN 106670257A CN 201710013289 A CN201710013289 A CN 201710013289A CN 106670257 A CN106670257 A CN 106670257A
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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
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
-
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- 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
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wire Processing (AREA)
Abstract
The invention provides production equipment for zinc-aluminum composite wires and a production method thereof. The equipment is provided with a reducing die, an aluminum material treatment mechanism, a die mechanism, a cooling mechanism and a multi-wedge draper-type tractor which are installed on a rack. The aluminum material treatment mechanism comprises a pressing wheel and an extruding wheel. The die mechanism comprises a die body, a heating plate, a die core, a die sleeve and die fixing bolts, and the heating plate is connected to the die body in an assembled mode. The production method comprises the following steps that the die body is pre-heated through the heating plate, a raw material aluminum rod is stored in a material groove of the extruding wheel, and the extruding wheel is driven by a motor to rotate, so that the raw material aluminum rod is pushed into an inner cavity of the die body; the raw material aluminum rod changes into semi-fluid-state molten aluminum, the molten aluminum flows through a gap between the die core and die sleeve, and then an aluminum pipe is formed; and then a raw material zinc wire is inserted into an inner hole of the aluminum pipe, and the raw material zinc wire and the aluminum pipe are pressed into a whole through extrusion of the reducing die under the effect of the multi-wedge draper-type tractor. The production equipment for the zinc-aluminum composite wires is simple in production technique, high in production efficiency, low in manufacturing cost and environmentally friendly in production process, and products can be used for thermal spraying.
Description
Technical field
Present invention relates particularly to the production equipment and its production method of a kind of zinc-aluminium composite wire.
Background technology
Ferrous materials are widely used in all trades and professions because of its excellent performance.However, metal material meeting and surrounding medium
Generation chemical reaction and electrochemical reaction and corroded, particularly corrode even more serious under marine climate environment.Metal
Corrosion has become the maximum harm of large-scale steel structure building, has a strong impact on it and uses safety and life-span.Conventional anti-corrosion method
Predominantly physical shielding method and electrochemical protection method.Physical shielding method be primarily referred to as by by guard member and corrosive medium completely every
From the coat composed erosion shield of such as inorganic or organic varnish；Electrochemical protection method refers to the more negative metal of current potential or employing
The method of additional power source so that protected structure is protected in corrosive medium environment in negative electrode.Such as galvanizing by dipping, aluminum
And its alloy, thermal jet zinc coating, aluminum and its alloy.For the thermal spray metal coating of anti-corrosion purpose, the gold commonly used in the market
Category coating material is zinc and saxonia metal wire, its according to chemical composition difference be divided into：Pure zinc silk, Zn-Al alloy wire ZnAl5, fine aluminium silk
Deng, they be widely used in colliery, port and pier, large-sized civil steel building, bridge, high-speed railway, large ship and
Other large industrialized projects（Such as petrochemical industry, electric power, ocean）On popularization and application, achieve excellent society and economic benefit.
Wherein, pure zinc silk because production method it is simple and widely used.The pure spelter coating of thermal spraying has good electrochemical protection characteristic, especially
It is suitable for inland air, fresh water environment, but in maritime environment and chemical environment, and decay resistance is not enough, and
The pure spelter coating hardness of thermal spraying is low, wears no resistance.In recent years, people's research finds that zinc-aluminum alloy coating has than pure zinc and fine aluminium
More superior Corrosion Protection, the low advantage of the corrosion rate of cathodic protection effect and aluminized coating with spelter coating.
Increasingly it is widely applied in Practical Project.
CN100376711C discloses a kind of thermal spraying Zinc-aluminum alloy wire composition and preparation method thereof, by weight percentage,
Its component is：Al：10%-20%, 0.006%≤M≤1.5%, total amount less than 1% impurity, balance of Zn, wherein M be RE,
Any one in Mg, Ti or B or its combination；Its preparation method is：First zinc ingot metal, aluminium ingot are added in alloy smelting furnace plus hot melt
Change, intermediate alloy added after refine, stir to it is melting down, stand, skim after carry out horizontal continuous-casting, what horizontal casting was obtained
Allumen blank thick line, then homogenizing annealing process, Jing drawings, tube reducing are into Zn-Al alloy wire product.CN102816952A is public
A kind of High-performance zinc-aluminum alloy wire is opened, has included following components in percentage by weight：Aluminum 10-45%, total amount is less than
0.03% impurity, balance of zinc；Manufacturing process comprises the steps：（1）Sorting,（2）Add in the zinc liquid of molten condition
Aluminium block carries out being sufficiently mixed after melting, then carries out casting forging, and the temperature of continuous casting furnace is 500-600 DEG C during casting forging,（3）Extruding,（4）When
Effect,（5）Stretching：Annealing furnace temperature 200-400 DEG C, time 2-4 hour, draw speed is 800-2000mm/s,（6）Timeliness,（7）Into
Product are packed.Because the processing method of above two zinc-aluminium composite wire is both needed to through adding heat fusing and casting, therefore production process
Not environmentally, and it is both needed to through heat treatment and need to be stretched, can just makes zinc-aluminium composite wire, therefore complex manufacturing, it is raw
Produce efficiency low, manufacturing cost is high.
The content of the invention
The first object of the present invention is to provide high a kind of simple production process, production efficiency, low cost of manufacture and produced
Cheng Huanbao and can be used for thermal spraying zinc-aluminium composite wire production equipment.
Realizing the technical scheme of above-mentioned first purpose is：A kind of production equipment of zinc-aluminium composite wire, it is improved by：Tool
There are rack-mounted reducing die, aluminum material processing mechanism, mold mechanism, cooling body and polywedge bet formula traction machine；
A, the aluminum material processing mechanism include contact roller and by motor-driven extruding wheel, have hopper, institute in the extruding wheel
State contact roller rolling to be connected on the periphery of extruding wheel；
B, the mold mechanism include die body, heating plate, core rod, die sleeve and mould fixing bolt, the heating plate assembly connection
On die body, the core rod and the coaxial assembly connection of die sleeve are in the inner chamber of die body and by mould fixing bolt axial limiting, institute
State core rod spindle nose be inserted in the aperture of die sleeve and spindle nose overall diameter less than aperture interior diameter.
In above-mentioned technical proposal, the cooling body 4 is cold rinse bank or cold water shower nozzle.
In above-mentioned technical proposal, also with velocity measuring wheel 6, displacement transducer is installed on the velocity measuring wheel 6.
In above-mentioned technical proposal, the bottom of the die body of the mold mechanism has gear liquid raised, the gear liquid projection position
In hopper.
The second object of the present invention is to provide high a kind of simple production process, production efficiency, low cost of manufacture and produced
Cheng Huanbao and can be used for thermal spraying zinc-aluminium composite wire production method.
Realizing the technical scheme of above-mentioned second purpose is：A kind of production method of zinc-aluminium composite wire, it is improved by：Adopt
It is processed with the above-mentioned equipment for preparing zinc-aluminium composite wire, is comprised the steps：
A, die body is preheated into 1-2 hours with heating plate, and make the temperature of die body reach 350~500 DEG C；
B, raw material aluminium bar is placed in the hopper of the extruding wheel of aluminum material processing mechanism, raw material aluminium bar is compressed by contact roller, by motor
Extruding wheel is driven to rotate in the inner chamber of the die body so as to drive raw material aluminium bar to mold mechanism in the presence of frictional force, raw material aluminum
It is heated in the inner chamber of bar die body after preheat and is changed into the aluminium liquid of semi-fluid condition, aluminium liquid flows through the spindle nose of core rod and the hole of die sleeve
Aluminum pipe is formed behind gap between mouthful；
C, artificial traction aluminum pipe make it be connected with the traction end of the steel wire rope of polywedge bet formula traction machine after cooling body cooling,
And it is integral aluminum pipe is fixedly connected with the traction end of steel wire rope Jing after reducing die extruding, and by polywedge bet formula machine travel aluminum pipe is drawn
Advance and make it around the home on the wire spool of polywedge bet formula traction machine；
D, raw material zinc wire is filled in after the endoporus of core rod, in being inserted into the endoporus of aluminum pipe, in the effect of polywedge bet formula traction machine
Under raw material zinc wire is together moved with aluminum pipe, first pass through cooling body cooling again through reducing die extrude and make aluminum pipe and raw material zinc
Line compress it is integral, so as to make zinc-aluminium composite wire, made by zinc-aluminium composite wire in the presence of polywedge bet formula traction machine
Around the home on the wire spool of polywedge bet formula traction machine.
In above-mentioned technical proposal, the rotating speed that extruding wheel is made in stepb is 2~3 revs/min.
In above-mentioned technical proposal, the rotating speed that extruding wheel is made in step d is improved to 6~8 revs/min.
Benefit of the invention is that：After using the production equipment and its production method of the zinc-aluminium composite wire of the present invention, due to
First die body can be preheated with heating plate, the temperature for making die body reaches 350~500 DEG C；Again raw material aluminium bar is placed in into aluminum material processing mechanism
Extruding wheel hopper in, Motor drive extruding wheel rotate so as in the presence of frictional force drive raw material aluminium bar to mold mechanism
Die body inner chamber in, be heated in the inner chamber of raw material aluminium bar die body after preheat and be changed into the aluminium liquid of semi-fluid condition, aluminium liquid stream
Aluminum pipe is formed Jing after the gap between the spindle nose of core rod and the aperture of die sleeve, then raw material zinc wire is inserted into the endoporus of aluminum pipe
In, make raw material zinc wire first pass through cooling body cooling with aluminum pipe in the presence of polywedge bet formula traction machine and extrude through reducing die again
And make aluminum pipe be compacted into one with raw material zinc wire, you can make the zinc-aluminium composite wire that can be used for thermal spraying.Thus production technology
Simply, production efficiency height, low cost of manufacture and production process environmental protection.
Description of the drawings
Fig. 1 is the schematic front view of the production equipment of the zinc-aluminium composite wire of the present invention；
Fig. 2 is the close-up schematic view of Fig. 1；
Fig. 3 is the A-A cross-sectional schematics of Fig. 1；
Fig. 4 is through the view before reducing die after aluminum pipe is connected with traction end；
Fig. 5 is through the view after reducing die after aluminum pipe is connected with traction end；
Fig. 6 is the schematic cross-section of the zinc-aluminium composite wire that the present invention is produced.
Specific embodiment
Below in conjunction with accompanying drawing and the embodiment for being given, the present invention is further illustrated.
As shown in Figure 1, 2, 3, a kind of production equipment of zinc-aluminium composite wire, with rack-mounted reducing die 1, aluminum
Material processing mechanism 2, mold mechanism 3, cooling body 4 and polywedge bet formula traction machine 5, the model of the polywedge bet formula traction machine 5
Type3200 or Type4000.
The aluminum material processing mechanism 2 includes contact roller 2-1 and by motor-driven extruding wheel 2-2, in extruding wheel 2-2
With hopper 2-2-1, the contact roller 2-1 is rolled and is connected on the periphery of extruding wheel 2-2.Contact roller 2-1 is used for compressing being placed in
Raw material aluminium bar 7-1 in hopper 2-2-1.
The mold mechanism 3 includes die body 3-1, heating plate 3-2, core rod 3-3, die sleeve 3-4 and mould fixing bolt 3-5,
On die body 3- 1, the core rod 3-3 and the coaxial assembly connections of die sleeve 3-4 are die body 3-1's for the heating plate 3-2 assembly connection
In inner chamber and by mould fixing bolt 3-5 axial limitings, the spindle nose 3-3-1 of the core rod 3-3 is inserted into the aperture 3- of die sleeve 3-4
In 4-1 and spindle nose 3-3-1 overall diameter less than aperture 3-4-1 interior diameter.
As shown in figure 1, the cooling body 4 is cold rinse bank or cold water shower nozzle, the setting of cooling body 4 not only can anti-work
People scalds, and makes wire rod easy mold release.
Also there is velocity measuring wheel 6, displacement transducer is installed on the velocity measuring wheel 6.
As shown in figure 3, the bottom of the die body 3-1 of the mold mechanism 3 has gear liquid projection 3-1-1, the gear liquid is raised
3-1-1 is located in hopper 2-2-1.Gear liquid projection 3-1-1 effectively prevents aluminium liquid 7-2 from flowing out along the side of hopper 2-2-1.
As shown in Figure 1, 2, a kind of production method of zinc-aluminium composite wire used for hot spraying, it is improved by：Using above-mentioned zinc
The production equipment of copper/aluminum composite wire is processed, and comprises the steps：
A, die body 3-1 is preheated into 1-2 hours with heating plate 3-2, and make the temperature of die body 3-1 reach 350-500 DEG C；
B, raw material aluminium bar 7-1 is placed in the hopper 2-2-1 of extruding wheel 2-2 of aluminum material processing mechanism 2, is compressed by contact roller 2-1
Raw material aluminium bar 7-1, Motor drive extruding wheel 2-2 is rotated so as to raw material aluminium bar 7-1 is driven in the presence of frictional force to molding machine
In the inner chamber of the die body 3-1 of structure 3, it is heated in the inner chamber of raw material aluminium bar 7-1 die body 3-1 after preheat and is changed into semi-fluid condition
Aluminium liquid 7-2, behind the gap that aluminium liquid 7-2 flows through between the aperture 3-4-1 of the spindle nose 3-3-1 and die sleeve 3-4 of core rod 3-3 aluminum pipe is formed
7-3；
C, artificial traction aluminum pipe 7-3 make it lead with the steel wire rope 5-1 of polywedge bet formula traction machine 5 after the cooling of cooling body 4
Draw end 5-1-1 connections, and make aluminum pipe 7-3 and the traction end 5-1-1 of steel wire rope 5-1 be fixedly connected into one Jing after reducing die 1 is extruded
Body, draws aluminum pipe 7-3 and advances and make it around the home on the wire spool of polywedge bet formula traction machine 5 by polywedge bet formula traction machine 5；
D, raw material zinc wire 8 is filled in after the endoporus of core rod 3-3, in being inserted into the endoporus of aluminum pipe 7-3, in polywedge bet formula traction machine
Raw material zinc wire 8 is together moved with aluminum pipe 7-3 in the presence of 5, first pass through cooling body 4 cool down extrude through reducing die 1 again and
Aluminum pipe 7-3 is compressed with raw material zinc wire 8 integral, so as to make zinc-aluminium composite wire 9, made by zinc-aluminium composite wire 9 many
In the presence of wedge belt traction machine 5 around the home on the wire spool of polywedge bet formula traction machine 5.
The rotating speed for making extruding wheel 2-2 in stepb is 2~3 revs/min.Due to the shape not yet Cheng Yuan of now aluminum pipe 7-3
Cylindricality, the rotating speed for making extruding wheel 2-2 is 2~3 revs/min of aluminium bars 7-1 that can economize in raw materials.
The rotating speed that extruding wheel 2-2 is made in step d is improved to 6~8 revs/min.Due to now having filled in raw material zinc wire 8,
Zinc-aluminium composite wire 9 is can be made into, the rotating speed for making extruding wheel 2-2 is improved to 6~8 revs/min and can quickly make zinc-aluminium composite wire
9。
The product of zinc-aluminium composite wire 9 made in aforementioned manners can be used for thermal spraying.
Claims (7)
1. a kind of production equipment of zinc-aluminium composite wire, it is characterised in that：With rack-mounted reducing die（1）, aluminum material
Processing mechanism（2）, mold mechanism（3）, cooling body（4）With polywedge bet formula traction machine（5）；
A, the aluminum material processing mechanism（2）Including contact roller（2-1）And extruding wheel（2-2）, the extruding wheel（2-2）It is upper that there is material
Groove（2-2-1）, and extruding wheel（2-2）Driven by motor, the contact roller（2-1）Rolling is connected to extruding wheel（2-2）'s
On periphery；
B, the mold mechanism（3）Including die body（3-1）, heating plate（3-2）, core rod（3-3）, die sleeve（3-4）Fix with mould
Bolt（3-5）, the heating plate（3-2）Assembly connection is in die body（3- 1）On, the core rod（3-3）And die sleeve（3-4）Coaxially
Assembly connection is in die body（3-1）Inner chamber in and by mould fixing bolt（3-5）Axial limiting, the core rod（3-3）Spindle nose
（3-3-1）It is inserted into die sleeve（3-4）Aperture（3-4-1）In and spindle nose（3-3-1）Overall diameter be less than aperture（3-4-1）It is interior
Diameter.
2. the production equipment of zinc-aluminium composite wire according to claim 1, it is characterised in that：The cooling body（4）For
Cold rinse bank or cold water shower nozzle.
3. the production equipment of zinc-aluminium composite wire according to claim 1, it is characterised in that：Also there is velocity measuring wheel
（6）, the velocity measuring wheel（6）On displacement transducer is installed.
4. the production equipment of zinc-aluminium composite wire according to claim 1, it is characterised in that：The mold mechanism（3）'s
Die body（3-1）Bottom have gear liquid raised（3-1-1）, the gear liquid projection（3-1-1）Positioned at hopper（2-2-1）In.
5. a kind of production method of zinc-aluminium composite wire, it is characterised in that：Using as described in any one such as Claims 1 to 4
The production equipment of zinc-aluminium composite wire is processed, and comprises the steps：
A, use heating plate（3-2）By die body（3-1）Preheating 1-2 hours, and make die body（3-1）Temperature reach 350-500 DEG C；
B, by raw material aluminium bar（7-1）It is placed in aluminum material processing mechanism（2）Extruding wheel（2-2）Hopper（2-2-1）In, by contact roller
（2-1）Compress raw material aluminium bar（7-1）, by Motor drive extruding wheel（2-2）Rotate so as to drive raw material in the presence of frictional force
Aluminium bar（7-1）To mold mechanism（3）Die body（3-1）Inner chamber in, raw material aluminium bar（7-1）Die body after preheat（3-1）'s
It is heated in inner chamber and is changed into the aluminium liquid of semi-fluid condition（7-2）, aluminium liquid（7-2）Flow through core rod（3-3）Spindle nose（3-3-1）With die sleeve
（3-4）Aperture（3-4-1）Between gap after form aluminum pipe（7-3）；
C, artificial traction aluminum pipe（7-3）It is made through cooling body（4）With polywedge bet formula traction machine after cooling（5）Steel wire rope
（5-1）Traction end（5-1-1）Connection, and Jing reducing dies（1）Aluminum pipe is made after extruding（7-3）With steel wire rope（5-1）Traction end
（5-1-1）Be fixedly connected it is integral, by polywedge bet formula traction machine（5）Traction aluminum pipe（7-3）Advance and make it around the home in polywedge bet
Formula traction machine（5）Wire spool on；
D, by raw material zinc wire（8）Fill in core rod（3-3）Endoporus after, be inserted into aluminum pipe（7-3）Endoporus in, in polywedge bet formula
Traction machine（5）In the presence of make raw material zinc wire（8）With aluminum pipe（7-3）Together move, first pass through cooling body（4）Cooling is passed through again
Reducing die（1）Extrude and make aluminum pipe（7-3）With raw material zinc wire（8）Compression is integral, so as to make zinc-aluminium composite wire（9）, system
Into zinc-aluminium composite wire（9）In polywedge bet formula traction machine（5）In the presence of around the home in polywedge bet formula traction machine（5）Wire spool
On.
6. the production method of zinc-aluminium composite wire according to claim 5, it is characterised in that：Extruding wheel is made in stepb
（2-2）Rotating speed be 2~3 revs/min.
7. the production method of zinc-aluminium composite wire according to claim 6, it is characterised in that：Work as aluminum pipe in step d（7-
3）With raw material zinc wire（8）After compression is integral, extruding wheel is made（2-2）Rotating speed improve to 6~8 revs/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710013289.4A CN106670257A (en) | 2017-01-09 | 2017-01-09 | Production equipment for zinc-aluminum composite wires and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710013289.4A CN106670257A (en) | 2017-01-09 | 2017-01-09 | Production equipment for zinc-aluminum composite wires and production method thereof |
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ID=58850288
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| CN108999004A (en) * | 2018-08-22 | 2018-12-14 | 张文英 | A kind of load-bearing wirerope oils anti-corrosive apparatus |
| CN109013730A (en) * | 2018-09-11 | 2018-12-18 | 浙江鸿耀高新铜材有限公司 | A kind of specially shaped copper tube continuous extrusion apparatus |
| CN110076324A (en) * | 2019-06-10 | 2019-08-02 | 常州齐丰连续挤压设备有限公司 | A kind of moulding process and equipment of zinc-aluminium composite material |
| CN110248749A (en) * | 2017-02-01 | 2019-09-17 | 罗伯特·博世有限公司 | Method for manufacturing cooling device |
| CN110556215A (en) * | 2018-06-04 | 2019-12-10 | 西部超导材料科技股份有限公司 | Method for assembling NbTi multi-core superconducting ingot blank |
| CN114345970A (en) * | 2021-12-06 | 2022-04-15 | 江苏理工学院 | High-strength corrosion-resistant aluminum alloy drill rod and preparation method thereof |
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