CN101767123A - Process and equipment for producing aluminum-cladding copper pipe - Google Patents
Process and equipment for producing aluminum-cladding copper pipe Download PDFInfo
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- CN101767123A CN101767123A CN200910266556A CN200910266556A CN101767123A CN 101767123 A CN101767123 A CN 101767123A CN 200910266556 A CN200910266556 A CN 200910266556A CN 200910266556 A CN200910266556 A CN 200910266556A CN 101767123 A CN101767123 A CN 101767123A
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- copper pipe
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- aluminium strip
- cladding copper
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Abstract
The invention relates to a process and equipment for producing an aluminum-cladding copper pipe. The process comprises the following steps of: on cladding and welding equipment, cladding and welding an aluminum strip outside a copper pipe to form an aluminum-cladding copper pipe blanket, wherein the copper pipe sand the aluminum strip are used as raw materials; before cladding and welding, straightening the copper pipe and performing polish-brush on the copper pipe and scalping the aluminum strip; conveying the aluminum-cladding copper pipe blanket to drawing equipment; drawing for at least two passes by adopting a mould with a moving core to tightly adhere the outer layer of aluminum pipe to the inner layer of copper pipe to form the aluminum-cladding copper pipe blanket, and winding and coiling; performing annealing treatment on the aluminum-cladding copper pipe blanket; putting a gas-forming substance into the cavity of the aluminum-cladding copper pipe blanket; sealing two end heads of the aluminum-cladding copper pipe blanket and putting the aluminum-cladding copper pipe blanket into a heating furnace for diffusion annealing to realize metallurgical bonding on the aluminum and the copper; and drawing the aluminum-cladding copper pipe again after the metallurgical bonding by adopting the mould with the moving core to ensure that the aluminum-cladding copper pipe have a designed regular shape. By taking the aluminum strip and the copper strip as the raw materials and utilizing the conventional equipment with simple structure and easy operation, the method has the advantages of simple process step, easy control, high production efficiency and low cost.
Description
Technical field
The present invention relates to a kind of production technology and equipment, particularly a kind of Processes and apparatus of producing aluminum-cladding copper pipe.
Background technology
Evaporimeter, condenser in air conditioner, the refrigerator uses aluminum-cladding copper pipe to replace pure copper tube mostly at present, to reduce production costs, to improve the heat exchange effect; In some equipment, also use aluminum-cladding copper pipe to replace pure aluminum tube in a large number, to improve its processing and serviceability.
Application number is the manufacture method that discloses a kind of copper aluminium composite tubing in 2006100760378 the application for a patent for invention Publication Specification; mainly be that to adopt the planetary rolling machine that copper aluminum composite pipes base suit or continuous casting is carried out aximal deformation value rolling; pipe is heated up; and by dynamically recovering crystallization again; make copper and aluminium realize metallurgical binding; by drawing, obtain required caliber then.The device structure complexity of this mode production of copper aluminium composite pipe costs an arm and a leg, and producting process difficulty is big, causes the production cost height.
Summary of the invention
The purpose of this invention is to provide that a kind of processing step and device structure are simple, the Processes and apparatus of processing ease, production cost is low, production efficiency is high production aluminum-cladding copper pipe, overcome the deficiencies in the prior art.
The technology of production aluminum-cladding copper pipe of the present invention comprises the steps:
A, be raw material, on clad welded equipment, the aluminium strip clad welded formed the aluminum-cladding copper pipe base in the copper pipe outside, before clad welded, copper pipe is aligned and polish-brush is handled, to the aluminium strip processing that strips off the skin with copper pipe and aluminium strip;
B, the aluminum-cladding copper pipe base is sent in the drawing equipment, adopted mould two passages of drawing at least that have floating core head, the copper pipe of outer field aluminum pipe and internal layer is fitted tightly, form the aluminum-cladding copper pipe base and twine and close;
C, the aluminum-cladding copper pipe base is carried out annealing in process, aluminum-cladding copper pipe base inner chamber is put into the material of getting angry, and, put into heating furnace then and carry out diffusion annealing, make the interface realization metallurgical binding of aluminium and copper the two ends sealing;
D, adopt the mould have floating core head to the aluminum-cladding copper pipe of realizing metallurgical binding again drawing once make it reach design size and regular profile.
The technology of production aluminum-cladding copper pipe of the present invention, wherein said copper pipe are that copper strips is placed on the general welded tube mill, are rolled into the copper pipe that longitudinal seam that tubulose and welding form is made.
The technology of production aluminum-cladding copper pipe of the present invention wherein saidly strips off the skin to aluminium strip that to handle be the processing that strips off the skin of the solder side with contacted coating face of inboard copper pipe and both sides to aluminium strip.
The technology of production aluminum-cladding copper pipe of the present invention; wherein said is that copper pipe and aluminium strip are sent into simultaneously with in the clad welded case of argon shield with the aluminium strip clad welded at copper pipe outside formation aluminum-cladding copper pipe base; aluminium strip bends to tubulose under the effect of a series of levels and vertical wheel; and wherein with the copper pipe coating; longitudinal seam with alternating-current argon arc welder welding aluminium strip forms forms the aluminum-cladding copper pipe base.
The technology of production aluminum-cladding copper pipe of the present invention, the temperature of wherein said annealing in process are controlled between 300 ℃～400 ℃, and temperature retention time is controlled between 0.5 hour～1.5 hours; The described material of getting angry get angry for being heated material or water.
The equipment of production aluminum-cladding copper pipe of the present invention, the welder that coating unit is arranged and match with coating unit, the exit of welder is provided with at least two group wire drawing machinees continuously and twines bin, be provided with aluminium strip stripper and copper pipe aligning polishing device in the inlet front side of coating unit, be provided with the aluminium strip bin of placing the aluminium strip dish in the inlet front side of aluminium strip stripper, be provided with the copper pipe biscuit frame of placing the copper pipe dish in the inlet front side of copper pipe aligning polishing device; The front side of described each wire drawing machine is provided with the tube-drawing die device that has floating core head;
Described aluminium strip stripper is formed by being supported on die holder on the die holder frame and the slicing mould that is contained on the die holder, and bolting is connected between the die holder frame of die holder and below, and slicing mould places in the die holder lateral groove;
Have triangle to become sharp cutting edge around the die orifice that strips off the skin on the described slicing mould, the entrance side of the die orifice that strips off the skin, another side has slick and sly chamfering.
The equipment of production aluminum-cladding copper pipe of the present invention is provided with the gap between the medial surface of wherein said lateral groove and the side of slicing mould.
The equipment of production aluminum-cladding copper pipe of the present invention is equipped with before the inlet of wherein said aluminium strip stripper and after the outlet and is used for guide roller that aluminium strip is led.
The technology of production aluminum-cladding copper pipe of the present invention, with aluminium strip and copper strips is raw material, and utilized a large amount of existing simple in structure, easy-operating equipment, make that whole technology has compared with prior art that processing step is simple, control easily, production efficiency height, advantage that cost is low.
The equipment of production aluminum-cladding copper pipe of the present invention has wherein comprised the equipment of existing production of copper alclad wire rod or producing steel-in-copper wires, makes integral device simple in structure, and low cost of manufacture is operated easily and controlled.
Description of drawings
Fig. 1 is the equipment overall structure figure that produces aluminum-cladding copper pipe among the present invention;
Fig. 2 is that the master of the slicing mould in the aluminium strip stripper shown in Figure 1 looks schematic diagram;
Fig. 3 is that schematic diagram is looked on a left side shown in Figure 2;
Fig. 4 is the scheme of installation of the slicing mould in the aluminium strip stripper shown in Figure 1.
The specific embodiment
The processing step of production aluminum-cladding copper pipe of the present invention is as follows:
A, be raw material, on clad welded equipment, the aluminium strip clad welded formed the aluminum-cladding copper pipe base in the copper pipe outside, before clad welded, copper pipe is aligned and polish-brush is handled, to the aluminium strip processing that strips off the skin with copper pipe and aluminium strip;
B, the aluminum-cladding copper pipe base is sent in the drawing equipment, adopted mould two passages of drawing at least that have floating core head, the copper pipe of outer field aluminum pipe and internal layer is fitted tightly, form the aluminum-cladding copper pipe base and twine and close;
C, the aluminum-cladding copper pipe base is carried out annealing in process, put into the material of getting angry at aluminum-cladding copper pipe base inner chamber before the annealing, and, put into heating furnace then and carry out diffusion annealing, make the interface realization metallurgical binding of aluminium and copper the two ends sealing;
D, adopt the mould have floating core head to the aluminum-cladding copper pipe of realizing metallurgical binding again drawing once make it reach design size and regular profile.
Wherein copper pipe is that copper strips is placed on the general welded tube mill, is rolled into the copper pipe that longitudinal seam that tubulose and welding form is made.Aluminium strip stripped off the skin, and to handle be to totally three faces processing that strips off the skin of aluminium strip and solders side contacted coating face of inboard copper pipe and both sides.The aluminium strip clad welded is formed the aluminum-cladding copper pipe base in the copper pipe outside be that copper pipe and aluminium strip are sent into simultaneously with in the clad welded case of argon shield; aluminium strip bends to tubulose under the effect of a series of levels and vertical wheel; and wherein with the copper pipe coating; longitudinal seam with alternating-current argon arc welder welding aluminium strip forms forms the aluminum-cladding copper pipe base.The temperature of annealing in process is controlled between 300 ℃～400 ℃, and temperature retention time is controlled between 0.5 hour～1.5 hours; The material of getting angry get angry for being heated material or water.
Below technology of the present invention and equipment are further described:
As shown in Figure 1: 17 is copper pipe biscuit frame, utilize copper strips on general welded tube mill, be rolled into the copper pipe that longitudinal seam that tubulose and welding form makes and be wound in copper pipe dish 1, copper pipe dish 1 places on the rolling disc of copper pipe biscuit frame 17 tops, when the external end head of copper pipe 19 is subjected to pulling force, whole copper pipe dish 1 is used to send copper pipe 19 with the turn disc of its below.
18 is the aluminium strip bin, and aluminium strip dish 2 places on the aluminium strip bin 18.
4 for the aligning polishing device, is made up of the combination smoothing roll and the electronic abrasive brush that are supported on the frame, is in operation and earlier copper pipe carried out straightening processing, then to its appearance outwash of polishing, removing surface contaminants.
Shown in Fig. 1,2,3,4,5: 5 is the aluminium strip stripper, form by being supported on die holder 26 on the die holder frame 25 and the slicing mould 24 that is contained on the die holder 26, stripping off the skin, bolting is connected between the die holder frame 25 of die holder 26 and below, and slicing mould 24 places in die holder 26 lateral grooves 27 that strip off the skin.Be provided with the gap between the side of the medial surface of lateral groove 27 and slicing mould 24.The die orifice 23 that strips off the skin that adapts with aluminium strip 20 sections is arranged on the slicing mould 24, and around the entrance side of the die orifice 23 that strips off the skin three limits being arranged is that top and dual-side form sharp cutting edge 21, the promptly following chamfering 22 that slyness is arranged of another side.During use, aluminium strip 20 enters from the entrance side of the die orifice 23 that strips off the skin, and under the pulling force effect, top (promptly the coating face) of 21 pairs of aluminium strips 20 of cutting edge and two sides (solder side) processing that strips off the skin with the removal foreign material, better contacts and longitudinal seam welding with copper pipe 19.
7 is coating unit, is equipped with manyly to level and vertical roller in it, is used for that aluminium strip 20 is rolled into tubulose and is coated on the outside of copper pipe 19.8 roll argon arc welding for friendship meets sb. at the airport, and 9 are the longitudinal seam welding device, and the longitudinal seam on the aluminum pipe that is coated on copper pipe 19 outsides is welded, and form the aluminum-cladding copper pipe base.
11 is first wire drawing machine, and the motor that joins with electric control gear is arranged in it, and motor connects the turning cylinder that protrudes upward, and first rotating disk 12 is arranged on the turning cylinder, is processed with the groove that matches with the aluminum-cladding copper pipe base on the outer circumference of first rotating disk 12.
10 is first to have the tube-drawing die device of floating core head, and during operation, the rotation of first rotating disk 12 produces pulling force, makes the aluminum-cladding copper pipe base of moulding obtain drawing for the first time at first tube-drawing die device 10 places that have floating core head.
14 is second wire drawing machine, and the motor that joins with electric control gear is arranged in it, and motor connects the turning cylinder that protrudes upward, and second rotating disk 15 is arranged on the turning cylinder, is processed with the groove that matches with the aluminum-cladding copper pipe base on the outer circumference of second rotating disk 15.
13 is second to have the tube-drawing die device of floating core head, and during operation, the rotation of second rotating disk 15 produces pulling force, and the aluminum-cladding copper pipe base after the drawing first time obtains drawing for the second time at second tube-drawing die device 13 places that have floating core head.After two passage drawings, form the aluminum-cladding copper pipe base that aluminium and copper fit tightly.16 for twining bin, can be wrapped in order on this bin through the aluminum-cladding copper pipe base after the drawing second time.
3 is rack-mounted first guide roller, is used for the guiding to the aluminium strip 20 before stripping off the skin, and 6 is rack-mounted second guide roller, is used for 20 guiding of the aluminium strip after stripping off the skin.
Above-described copper pipe biscuit frame 17, aluminium strip bin 18, aligning polishing device 4, coating unit 7, hand over and roll argon arc welding machine 8, longitudinal seam welding device 9, twine bin 16 and be the production of copper alclad wire rod selected for use or the existing apparatus in the producing steel-in-copper wires equipment.This device and first wire drawing machine 11 that first rotating disk 12 is housed are chained together with second wire drawing machine 14 that second rotating disk 15 is housed, form the production line of an aluminum-cladding copper pipe base.Above-mentioned wire drawing machine is an existing equipment.The tube-drawing die device 13 that the first tube-drawing die device 10, second that has floating core head has floating core head is the existing drawing mould that is used for drawing pipes.The drawing mould compact dimensions that is positioned at back a time should make progressively drawing moulding of tubing less than the drawing mould compact dimensions of preceding a time.According to the specification of tubing, this production line also can be provided with the more drawing procedure of multi-pass.
Aluminum-cladding copper pipe base after the drawing is carried out internal pressurization formula annealing in process.
Be example now, its production process is described with production φ 9.52mm * 0.5mm, the long-pending aluminum-cladding copper pipe that accounts for the section gross area 15% of tubing section copper aspect.
The external diameter φ 9.52mm of this production tube, internal diameter φ 8.52mm, wall thickness are 0.5mm, and wherein aluminum layer thickness is 0.425mm, and copper layer thickness is 0.075mm.
The external diameter that now designs the aluminum-cladding copper pipe base is φ 11.50mm, and internal diameter is φ 9.50nn, and an ancient piece of jade, round, flat and with a hole in its centre is thick to be 1mm.Selecting thickness for use is that 0.3mm, width are that the T2 copper strips of 31.7mm and thickness are that 0.7mm, width are that the L2 aluminium strip of 37.4mm is raw material.
At first copper strips being welded into external diameter with welded tube mill by above-mentioned steps is that φ 10.10mm, internal diameter are the pipe of φ 9.50mm.
As shown in Figure 1 aluminium strip 20 and copper pipe 19 are sent in the production line of aluminum-cladding copper pipe simultaneously.At first copper pipe is aligned and the polish-brush outer surface; Aluminium strip is by slicing mould, will coat face and the both sides solder side is taken 0.05mm off.Enter then in the cladding welder, make aluminium strip progressively be rolled into tubulose and form a longitudinal joint around copper pipe, after exchanging Ar arc-welding machine welding longitudinal joint, forming external diameter is that φ 11.90mm, internal diameter are the aluminum pipe of φ 10.50mm, and wherein being with external diameter is that φ 10.10mm, internal diameter are that φ 9.50mm copper pipe forms the aluminum-cladding copper pipe base.The difference of aluminum pipe internal diameter and copper pipe external diameter is about 0.4mm.
Then the aluminum-cladding copper pipe base enters in the drawing equipment, carries out the drawing of 2 passages with the tube-drawing die device that has floating core head.When first passage was drawn, the internal diameter of drawing die was φ 10.75mm, and the external diameter of floating core head is φ 9.15mm; During second passes of drawing, the internal diameter of drawing die is 10.00mm, and the external diameter of floating core head is 8.80mm.Obtain the aluminum-cladding copper pipe base that aluminium lamination and copper layer fit tightly.
After putting into a certain amount of material of getting angry (as urea) in the above-mentioned aluminum-cladding copper pipe base or charging into a certain amount of clear water, two ends is sealed.Sealing means can select to push the mode of flattening, makes the termination be in sealing state.Put into heating furnace then, be heated to about 350 ℃, be incubated 1 hour and carry out diffusion annealing.Come out of the stove after being cooled to normal temperature.Make aluminium lamination and copper layer realize metallurgical binding, and eliminated the work hardening phenomenon.In annealing process, the pressure of aluminum-cladding copper pipe inner chamber is controlled at 4MPa or 5MPa or 6MPa, promptly between 4-6MPa all can, to guarantee the metallurgical binding of aluminium and copper.
Aluminum-cladding copper pipe after the heat treatment has accurate dimensions and regular shape in order to make it, carries out a drawing again according to the suitable mould of preferred dimension that requires of finished size, and making its external diameter is φ 9.52mm, and internal diameter is φ 8.52mm, and an ancient piece of jade, round, flat and with a hole in its centre is thick to be 0.5mm.
Claims (8)
1. a technology of producing aluminum-cladding copper pipe is characterized in that: comprise the steps:
A, be raw material, on clad welded equipment, the aluminium strip clad welded formed the aluminum-cladding copper pipe base in the copper pipe outside, before clad welded, copper pipe is aligned and polish-brush is handled, to the aluminium strip processing that strips off the skin with copper pipe and aluminium strip;
B, the aluminum-cladding copper pipe base is sent in the drawing equipment, adopted mould two passages of drawing at least that have floating core head, the copper pipe of outer field aluminum pipe and internal layer is fitted tightly, form the aluminum-cladding copper pipe base and twine and close;
C, the aluminum-cladding copper pipe base is carried out annealing in process, aluminum-cladding copper pipe base inner chamber is put into the material of getting angry, and, put into heating furnace then and carry out diffusion annealing, make the interface realization metallurgical binding of aluminium and copper the two ends sealing;
D, adopt the mould have floating core head to the aluminum-cladding copper pipe of realizing metallurgical binding again drawing once make it reach design size and regular profile.
2. the technology of production aluminum-cladding copper pipe according to claim 1 is characterized in that: described copper pipe is that copper strips is placed on the general welded tube mill, is rolled into the copper pipe that longitudinal seam that tubulose and welding form is made.
3. the technology of production aluminum-cladding copper pipe according to claim 2 is characterized in that: describedly aluminium strip is stripped off the skin to handle be the processing that strips off the skin of the solder side with contacted coating face of inboard copper pipe and both sides to aluminium strip.
4. the technology of production aluminum-cladding copper pipe according to claim 3; it is characterized in that: described is that copper pipe and aluminium strip are sent into simultaneously with in the clad welded case of argon shield with the aluminium strip clad welded at copper pipe outside formation aluminum-cladding copper pipe base; aluminium strip bends to tubulose under the effect of a series of levels and vertical wheel; and wherein with the copper pipe coating; longitudinal seam with alternating-current argon arc welder welding aluminium strip forms forms the aluminum-cladding copper pipe base.
5. the technology of production aluminum-cladding copper pipe according to claim 4 is characterized in that: the temperature of described annealing in process is controlled between 300 ℃～400 ℃, and temperature retention time is controlled between 0.5 hour～1.5 hours; The described material of getting angry get angry for being heated material or water.
6. equipment of producing aluminum-cladding copper pipe, it is characterized in that: the welder (9) that coating unit (7) is arranged and match with coating unit (7), the exit of welder (9) is provided with at least two group wire drawing machinees continuously and twines bin (16), be provided with aluminium strip stripper (5) and copper pipe aligning polishing device (4) in the inlet front side of coating unit (7), be provided with the aluminium strip bin (18) of placing aluminium strip dish (2) in the inlet front side of aluminium strip stripper (5), be provided with the copper pipe biscuit frame (17) of placing copper pipe dish (1) in the inlet front side of copper pipe aligning polishing device (4); The front side of described each wire drawing machine is provided with the tube-drawing die device that has floating core head;
Described aluminium strip stripper (5) is made up of the slicing mould (24) that is supported on the die holder (26) on the die holder frame (25) and be contained on the die holder (26), bolting is connected between the die holder frame (25) of die holder (26) and below, and slicing mould (24) places in die holder (26) lateral groove (27);
Have triangle to become sharp cutting edge (21) around the die orifice (23) that strips off the skin on the described slicing mould (24), the entrance side of the die orifice that strips off the skin (23), another side has slick and sly chamfering (22).
7. the equipment of production aluminum-cladding copper pipe according to claim 6 is characterized in that: be provided with the gap between the side of the medial surface of described lateral groove (27) and slicing mould (24).
8. the equipment of production aluminum-cladding copper pipe according to claim 7 is characterized in that: be equipped with before the inlet of described aluminium strip stripper (5) and after the outlet and be used for guide roller that aluminium strip is led.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910266556A CN101767123A (en) | 2009-12-29 | 2009-12-29 | Process and equipment for producing aluminum-cladding copper pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266556A CN101767123A (en) | 2009-12-29 | 2009-12-29 | Process and equipment for producing aluminum-cladding copper pipe |
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| CN200910266556A Pending CN101767123A (en) | 2009-12-29 | 2009-12-29 | Process and equipment for producing aluminum-cladding copper pipe |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172812A (en) * | 2010-12-31 | 2011-09-07 | 马志强 | Hollow aluminium division bar continuous moulding method |
| CN102284549A (en) * | 2011-08-31 | 2011-12-21 | 江苏兴荣高新科技股份有限公司 | Manufacturing method of aluminum-clad copper pipe having metallurgical bonding |
| CN102527768A (en) * | 2010-12-08 | 2012-07-04 | 江苏兴荣高新科技股份有限公司 | Manufacturing method of copper-clad aluminum pipe |
| CN103021556A (en) * | 2011-09-27 | 2013-04-03 | 吴江市中信科技有限公司 | Coating machine |
| CN103394975A (en) * | 2013-07-31 | 2013-11-20 | 山东莱芜金石集团有限公司 | Process and device for surface treatment of cold-rolled copper and aluminum composites |
| CN104148438A (en) * | 2014-07-03 | 2014-11-19 | 北京科技大学 | Preparation method of metal layered composite material by multi-head sleeve drawing composition |
| CN105081000A (en) * | 2015-09-06 | 2015-11-25 | 成羽 | Metal fiber manufacturing method and device |
| CN102982903B (en) * | 2012-11-26 | 2017-05-24 | 大连通发新材料开发有限公司 | Method for producing copper-clad aluminum pipe and used production line |
| CN106785771A (en) * | 2016-12-28 | 2017-05-31 | 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 |
| CN108435810A (en) * | 2017-02-16 | 2018-08-24 | 湖南德润有色焊材科技有限公司 | A kind of rotation scrape type welding wire surface light processing unit and treatment process |
| CN112050178A (en) * | 2020-08-11 | 2020-12-08 | 台州市黄岩喜运来电器有限公司 | High-efficiency energy-saving aluminum-clad copper steam generator |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527768A (en) * | 2010-12-08 | 2012-07-04 | 江苏兴荣高新科技股份有限公司 | Manufacturing method of copper-clad aluminum pipe |
| CN102172812A (en) * | 2010-12-31 | 2011-09-07 | 马志强 | Hollow aluminium division bar continuous moulding method |
| CN102172812B (en) * | 2010-12-31 | 2012-11-07 | 马志强 | Hollow aluminium division bar continuous moulding method |
| CN102284549A (en) * | 2011-08-31 | 2011-12-21 | 江苏兴荣高新科技股份有限公司 | Manufacturing method of aluminum-clad copper pipe having metallurgical bonding |
| CN103021556A (en) * | 2011-09-27 | 2013-04-03 | 吴江市中信科技有限公司 | Coating machine |
| CN102982903B (en) * | 2012-11-26 | 2017-05-24 | 大连通发新材料开发有限公司 | Method for producing copper-clad aluminum pipe and used production line |
| CN103394975A (en) * | 2013-07-31 | 2013-11-20 | 山东莱芜金石集团有限公司 | Process and device for surface treatment of cold-rolled copper and aluminum composites |
| CN104148438A (en) * | 2014-07-03 | 2014-11-19 | 北京科技大学 | Preparation method of metal layered composite material by multi-head sleeve drawing composition |
| CN104148438B (en) * | 2014-07-03 | 2016-01-20 | 北京科技大学 | A kind of layered metal composite material bull sleeve drawing composite preparation process |
| CN105081000A (en) * | 2015-09-06 | 2015-11-25 | 成羽 | Metal fiber manufacturing method and device |
| CN106785771A (en) * | 2016-12-28 | 2017-05-31 | 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 |
| 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 |
| CN108435810A (en) * | 2017-02-16 | 2018-08-24 | 湖南德润有色焊材科技有限公司 | A kind of rotation scrape type welding wire surface light processing unit and treatment process |
| CN112050178A (en) * | 2020-08-11 | 2020-12-08 | 台州市黄岩喜运来电器有限公司 | High-efficiency energy-saving aluminum-clad copper steam generator |
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Application publication date: 20100707 |