CN101391269B - Broad-width extrusion device and technique thereof - Google Patents

Broad-width extrusion device and technique thereof Download PDF

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Publication number
CN101391269B
CN101391269B CN2008102285772A CN200810228577A CN101391269B CN 101391269 B CN101391269 B CN 101391269B CN 2008102285772 A CN2008102285772 A CN 2008102285772A CN 200810228577 A CN200810228577 A CN 200810228577A CN 101391269 B CN101391269 B CN 101391269B
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extrusion
flat
pressure ram
recipient
cylinder
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CN101391269A (en
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权高峰
严峰
周鹤龄
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Beijing Huashengrong Magnesium Industry Technology Co., Ltd.
Dalian Jiaotong University
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Dalian Jiaotong University
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Priority to CN2008102285772A priority Critical patent/CN101391269B/en
Publication of CN101391269A publication Critical patent/CN101391269A/en
Priority to PCT/CN2009/074791 priority patent/WO2010051754A1/en
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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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/06—Making sheets
    • 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
    • B21C26/00—Rams or plungers; Discs therefor
    • 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
    • B21C27/00—Containers for metal to be extruded

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)

Abstract

The invention relates to a broad-width extrusion device and an extrusion technology. The extrusion device comprises an extrusion machine and a temperature measuring-cooling system. The extrusion device is characterized in that the extrusion machine is provided with flat extrusion cavity and a flat extrusion cylinder coat adaptive with the flat extrusion cavity; a guide way is arranged below an extrusion cylinder; a combined structure of a flat extrusion rod and an extrusion seat corresponding to the flat extrusion cavity is also arranged, and the extrusion rod is connected with a piston of a hydraulic cylinder through the extrusion seat; the height and the width of the combined surface of the extrusion seat and the extrusion rod are respectively equal to and no less than the corresponding size of the extrusion rod. The invention adopts the flat extrusion cylinder, uses a flat ingot as an extrusion blank and adopts the combined structure of the flat extrusion rod and the extrusion seat so as to realize high-efficiency extrusion of flat and broad-width proximate matter of large-specification magnesium alloy and aluminum alloy and obtain broad-width proximate matter or plank stuff with the breadth exceeding 750 mm. the invention especially overcomes the defects that the magnesium alloy rolling has low rolling yield and low production efficiency, and effectively realizes the extrusion production of ultra-breadth proximate matter and plank stuff/plate blank, which is difficultly completed by a ten-thousand-ton extruding press.

Description

Wide cut pressurizing unit and extrusion process
Technical field
The present invention relates to extrusion equipment and compression tool, relate in particular to a kind of wide cut pressurizing unit and extrusion process.
Background technology
Magnesium alloy is as the lightest high performance structures material, and its large-sized plates material, section bar particularly have fabulous application prospect in the manufacturing of modern railway transportation transportation equipment, as can be used as structures such as floor, door-plate at aerospace vehicle manufacturing, communications and transportation equipment.Yet because large-sized plates material and section bar are very rare on market, and price is high, is badly in need of addressing this problem from the technology and equipment aspect.As we all know because the crystal structure characteristic of the inner close-packed hexagonal of magnesium alloy, make its under normal condition the plastic working resistance greater than aluminium alloy, as shown in table 1; The production technology of aluminium alloy is continued to use in existing magnesium alloy plate production, be ingot casting cogging, hot rolling, cold rolling, and in rolling, big specification magnesium alloy ingot cogging difficulty, be easy to cracking, reduction in pass is limited and different road suboptimum drafts requirement difference, need repeatedly in the middle of heating (annealing), that phenomenon is split on the limit is commonplace, every time is rolling all to need to cut edge, and has caused inefficient, low lumber recovery, drawback such as expensive.Conventional magnesium alloy profiles extruding, adopt conventional extrusion equipment at present, because recipient is cylindrical, the be squeezed restriction of a diameter of the section bar width of being produced, even ten thousand tons of maximum at present both at home and abroad extruders, maximum recipient diameter also has only 550mm, and the Breadth Maximum of institute's extruding aluminium alloy sectional can only reach 600mm; Then for the big specification section bar of wide cut, as appearance and size is the flat section bar of hollow of 25mm * 700mm * 30000mm, its production and processing almost can't realize, as previously mentioned, the plastic processing deformation ability of magnesium alloy is lower than aluminium alloy, the ingot blank broadening ratio that can realize when super wide plate of extrusion magnesium alloy and super wide cut section bar is subjected to the constraint of ingot blank diameter, and the ingot blank diameter depends on the recipient diameter; Conventional extruded tube diameter is by the maximum extrusion capability decision of extruder.Therefore adopt conventional extruded equipment can't realize the extruding of wide cut large-sized plates material and section bar.Adopt super wide cut pressing method production wide cut slab and wide cut section bar, will fundamentally solve this technical bottleneck.Table 1: but the extrded material characteristic
Material Represent the trade mark The processing temperature scope The plasticity flow performance The room temperature yield strength, MPa
Aluminium alloy ?6082，5083 280～450℃ Plastic fluidity is good 80～200
Magnesium alloy ?AZ31B，ZK60 300～400℃ Plastic fluidity is general 120～230
Summary of the invention
In view of existing in prior technology the problems referred to above, the present invention aims to provide a kind of wide cut pressurizing unit and extrusion process, fundamentally solving this technical bottleneck, thereby realize that expeditiously ten thousand tons of extruders also are difficult to the big specification section bar of wide cut finished and the extruding production of sheet material/slab.
Technical solution of the present invention is achieved in that
A kind of wide cut pressurizing unit comprises extruder and thermometric-cooling system, and described extruder comprises recipient, pressure ram, body supports-location structure, walking beam, feed mechanism, hydraulic system and control system; Described body supports-location structure comprises by front beam, rear cross beam and laterally zygomorphic each two tension post fixedlys connected the rigid structure that constitutes, and is installed with die frame on the right side of front beam, and described die frame is between recipient and front beam; Hydraulic cylinder and rear cross beam in the hydraulic system are fixedly connected, and piston and walking beam are fixedly connected, described walking beam be placed on the tension post and with the action of piston along the horizontal slip of tension post; Described thermometric-cooling system is positioned at the exit position of the extrusion in front beam left side; It is characterized in that:
The flat extruding cylinder overcoat that described recipient has flat extrusion chamber and adapts with it; Described flat extruding cylinder overcoat has oval cross section;
Also be provided with guide rail under the described recipient, described guide rail and body supports-location structure have same ground and same axis;
Described pressure ram has the flat cross section that adapts with described flat extrusion chamber, and is connected with piston by the extruding seat; Described extruding seat and the height of the faying face of pressure ram and the correspondingly-sized that width equals and be not less than described pressure ram respectively.
Described hydraulic system is a combination hydraulic system, comprises main hydraulic cylinder and two secondary hydraulic cylinders and fixedlys connected with rear cross beam respectively, and main piston is then fixedlyed connected with walking beam respectively with auxiliary piston, and main piston is connected with pressure ram by the extruding seat.
The extrusion process of a kind of wide cut section bar and sheet material comprises following process:
(1) installation mold: mould is installed on the die frame;
(2) prepare flat blank: flat blank removes slag through the surface, after the preliminary treatment, send into recipient by feed mechanism before;
(3) flat blank enters flat extrusion chamber: adopt combination hydraulic system, described combination hydraulic system comprises master cylinder and two auxiliary oil cylinders and fixedlys connected with rear cross beam respectively, main piston is then fixedlyed connected with walking beam respectively with auxiliary piston, and main piston is connected with pressure ram by the extruding seat.Master cylinder is opened, and auxiliary oil cylinder moves, and drives the walking beam reach, sends in the flat extrusion chamber that size is suitable with it by extruding seat promotion pressure ram reach and with described flat blank;
(4) matched moulds: the master cylinder standard-sized sheet, auxiliary oil cylinder continues action, and recipient is its lower guideway reach in the promotion lower edge of pressure ram, with the die frame centering that is installed on the front beam, finishes matched moulds;
(5) extrusion modling: the major-minor oil cylinder moves simultaneously, and pressure ram and walking beam move forward synchronously, and flat blank is extruded through mould, forms extrusion and sends from the outlet of the front beam outside;
(6) thermometric and cooling: in exit, the described front beam outside, thermometric-cooling system starts in real time, and according to actual outlet temperature control intensity of cooling;
(7) cut out finishing: cutting device is cut out the finishing of trimming to extrusion;
(8) hauling machine clamps extrusion by hold assembly and moves apart operating desk.
Described flat extrusion chamber is that the side is the flat rectangular inner chamber of circular arc, height * wide=(200～300) * (700～800) mm, and described flat blank is the corresponding to it magnesium alloy annealing of a geomery ingot casting; Total nominal pressure of described combination hydraulic system is 4500～8000 tons; The horizontal drag force of described hauling machine 〉=200 ton.
Compared to existing technology, the invention has the beneficial effects as follows conspicuous:
Because the present invention adopts flat extruding cylinder, with slab ingot as extruded stock, adopt flat pressure ram and the combining structure of pushing seat simultaneously, improved the Flow Field Distribution in the extrusion process greatly, significantly reduced actual extrusion ratio, effectively reduced the complexity of actual extruding force-summing device, reduced extrusion equipment power source power, make 4500～8000 tons conventional commercial liquid potential source can be used for the wide cut extruding, make the construction cost of integral device descend 40%～50%, can realize big specification magnesium alloy, the high efficiency extruding of aluminium alloy flat plate and wide cut section bar, obtain wide cut section bar or sheet material that the breadth width surpasses 750mm, especially overcome the low and low shortcoming of production efficiency of magnesium alloy rolling lumber recovery, realize that expeditiously ten thousand tons of extruders also are difficult to the super wide cut section bar finished and the extruding production of sheet material/slab.
Description of drawings
Fig. 1 is the wide cut pressurizing unit schematic diagram of embodiment;
Fig. 2 is the structural representation of extruder;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the structural representation of recipient;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the combining structure schematic diagram of pressure ram-extruding seat;
Fig. 7 is the structural representation of front beam;
Fig. 8 is the left view of Fig. 7;
Fig. 9 is the structural representation of rear cross beam;
Figure 10 is the left view of Fig. 9;
Figure 11 is the structural representation of walking beam;
Figure 12 is the left view of Figure 11.Among the figure,
11, recipient
111, extrusion chamber
112, recipient liner
113, cover in the recipient
114, heater
115, heat insulation-heat-insulation layer
116, recipient overcoat
12, feed mechanism
13, pressure ram
14, extruding seat
15, walking beam
161, front beam
162, tension post
163, rear cross beam
17, die frame
181, master cylinder
182, auxiliary oil cylinder
183, main piston
184, auxiliary piston
19, scissors
2, row's formula ensilage dump blower
3, cutting device
4, hauling machine
The specific embodiment
Now the present invention is further illustrated in conjunction with the accompanying drawings:
A kind of wide cut pressurizing unit comprises extruder and thermometric-cooling system, and is furnished with cutting device 3 and hauling machine 4, as shown in Figure 1.
Described extruder as Fig. 1, Fig. 2 and shown in Figure 3, comprises recipient 11, pressure ram-extruding seat, body supports-location structure, walking beam 15, feed mechanism 12, combination hydraulic system and control system; Wherein,
Described recipient 11, as Fig. 4, shown in Figure 5, having the side is the flat rectangular extrusion chamber 111 of circular arc, its height * wide=(200～300) * (700～800) mm, its outside flat extruding cylinder overcoat 116 for adapting with it; Described flat extruding cylinder overcoat 116 has oval cross section, comprises cover 113 in recipient liner 112, the recipient, axial uniform 12 groups of 45*100 heaters 114 and heat insulation-heat-insulation layer 115 between extrusion chamber 111 and the overcoat 116 from the inside to the outside; Described recipient also is provided with guide rail 11 times, and described guide rail and body supports-location structure have same ground and same axis;
Described pressure ram-extruding seat, as shown in Figure 6, pressure ram 13 has the flat cross section that adapts with described flat extrusion chamber 111, and is connected with the main piston 183 of combination hydraulic system by extruding seat 14; Described extruding seat 14 and the height of the faying face of pressure ram 13 and the correspondingly-sized that width equals and be slightly larger than described pressure ram 13 respectively;
Described body supports-location structure comprise by front and back crossbeam 161 and 163, and laterally zygomorphic each two tension post 162 fixedly connected the rigid structure that constitutes; Described front beam 161, as Fig. 7, shown in Figure 8, described rear cross beam 163, as Fig. 9 and shown in Figure 10, described walking beam 15 is as Figure 11, shown in Figure 12; Be installed with die frame 17 on the right side of front beam 161, described die frame is between recipient 11 and front beam 161, and oil cylinder 181,182 and rear cross beam 163 are fixedly connected; The main piston 183 of combination hydraulic system and auxiliary piston 184 all are fixedly connected with walking beam 15, described walking beam 15 be placed on the tension post 162 and with the action of piston along 162 horizontal slips of tension post; As Fig. 1, Fig. 2 and shown in Figure 3;
Described combination hydraulic system comprises master cylinder 181 and two auxiliary oil cylinder 182a and 182b, as Fig. 1, Fig. 2 and shown in Figure 3, is conventional commercial apparatus, and is identical with common extruder, can produce 7000 tons of extruding forces altogether.
Described thermometric-cooling system is positioned at the exit position of the extrusion in front beam 161 left sides, adopts 2 pairs of outlets of row's formula ensilage dump blower section bar to cool off, as Fig. 1, Fig. 2 and shown in Figure 3.
Cutting device 3 and hauling machine 4 are arranged on the operating desk outside front beam 161 exits, as shown in Figure 1.Described hauling machine 4 is the High power Traction system, adopts 〉=200 tons of hydraulic haulage systems, is the market universal design.
Use above-mentioned wide cut extrusion device magnesium alloy wide cut section bar and sheet material, fabric width＞750mm, its technical process is as follows:
(1) installation mold: mould is installed on the die frame 17;
(2) prepare flat blank: flat blank is a magnesium alloy annealing ingot casting, with the flat extrusion chamber 111 of recipient 11 same size is arranged, remove slag through the surface, after the preliminary treatment, send into recipient 11 by feed mechanism 12 before;
(3) flat blank enters flat extrusion chamber 111: adopt combination hydraulic system, master cylinder 181 is opened, auxiliary oil cylinder 182a and 182b move, and drive walking beam 15 reaches, send in the flat extrusion chamber 111 that size is suitable with it by 14 promotion pressure rams, 13 reaches of extruding seat and with described flat blank;
(4) matched moulds: master cylinder 181 standard-sized sheets, auxiliary oil cylinder 182a and 182b continue action, and recipient 11 is its lower guideway reach in the promotion lower edge of pressure ram 13, with die frame 17 centerings that are installed on the front beam 161, finishes matched moulds;
(5) extrusion modling: major and minor oil cylinder 181 and 182 moves simultaneously, and pressure ram 13 move forward synchronously with walking beam 15, and blank is extruded through mould, the formation extrusion and outside front beam 161 side outlet send;
(6) thermometric and cooling: in exit, described front beam 161 outside, thermometric-cooling system starts in real time, and according to actual outlet temperature control intensity of cooling;
(7) hauling machine 4 clamps extrusion by hold assembly, and extrusion is applied enough hightensions, and extrusion is straight does not bend or warpage in assurance, and moves apart operating desk;
(8) cut out finishing: the finishing that 3 pairs of extrusions of cutting device are cut out trimming;
(9) reset: major and minor oil cylinder 181 and 182 oil returns, pressure ram 13-walking beam 15 is return initial position to the right; Recipient 11 retreats to initial position along its guide rail; Be installed on scissors 19 actions of top, front beam 161 right sides, wipe out blank residual on the mould, make die frame 17-mould reply the state of preparing extruding.
Magnesium alloy wide cut section bar and sheet material (fabric width＞750mm), be product in short supply in the market, apparatus of the present invention can be produced:
One, flat profile: fabric width＞750mm, gross thickness 15～50mm, hollow, wall thickness 2.5～5.0mm, length 10000～40000mm.Product is mainly used in large and medium-sized lightweight structures such as lightweight track train equipment (as train body), Aeronautics and Astronautics device structure.
Two, solid slab: fabric width＞750mm, thickness 8～25mm, length＞15000mm.Can realize lumber recovery＞90%.
Such extrusion plate is the universal product, both can directly be used as sheet material, also can be used as rolling littler thickness, more wide format is (as the high-quality slab of 〉=2500mm) wide cut thin plate, to satisfy the super wide product demand of magnesium alloy in fields such as new automobile, lightweight track traffic transportation equipment, aircraft, military equipment.
The above; only be the preferable specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.

Claims (4)

1. a wide cut pressurizing unit comprises extruder and thermometric-cooling system, and described extruder comprises recipient, pressure ram, body supports-location structure, walking beam, feed mechanism, hydraulic system and control system; Described body supports-location structure comprises by front beam, rear cross beam and laterally zygomorphic each two tension post fixedlys connected the rigid structure that constitutes, and is installed with die frame on the right side of front beam, and described die frame is between recipient and front beam; Hydraulic cylinder and rear cross beam in the hydraulic system are fixedly connected, and piston and walking beam are fixedly connected, described walking beam be placed on the tension post and with the action of piston along the horizontal slip of tension post; Described thermometric-cooling system is positioned at the exit position of the extrusion in front beam left side; It is characterized in that:
The flat extruding cylinder overcoat that described recipient has flat extrusion chamber and adapts with it; Described flat extruding cylinder overcoat has oval cross section;
Also be provided with guide rail under the described recipient, described guide rail and body supports-location structure have same ground and same axis;
Described pressure ram has the flat cross section that adapts with described flat extrusion chamber, and is connected with piston by the extruding seat; Described extruding seat and the height of the faying face of pressure ram and the correspondingly-sized that width equals and be not less than described pressure ram respectively.
2. wide cut pressurizing unit according to claim 1, it is characterized in that described hydraulic system is a combination hydraulic system, comprise main hydraulic cylinder and two secondary hydraulic cylinders and fixedly connected with rear cross beam respectively, main piston is then fixedlyed connected with walking beam respectively with auxiliary piston, and main piston is connected with pressure ram by the extruding seat.
3. the extrusion process of wide cut section bar and sheet material comprises following process:
(1) installation mold: mould is installed on the die frame;
(2) prepare flat blank: flat blank removes slag through the surface, after the preliminary treatment, send into recipient by feed mechanism before;
(3) flat blank enters flat extrusion chamber: adopt combination hydraulic system, described combination hydraulic system comprises master cylinder and two auxiliary oil cylinders and fixedlys connected with rear cross beam respectively, main piston is then fixedlyed connected with walking beam respectively with auxiliary piston, and main piston is connected with pressure ram by the extruding seat; Master cylinder is opened, and auxiliary oil cylinder moves, and drives the walking beam reach, sends in the flat extrusion chamber that size is suitable with it by extruding seat promotion pressure ram reach and with described flat blank;
(4) matched moulds: the master cylinder standard-sized sheet, auxiliary oil cylinder continues action, and recipient is its lower guideway reach in the promotion lower edge of pressure ram, with the die frame centering that is installed on the front beam, finishes matched moulds;
(5) extrusion modling: the major-minor oil cylinder moves simultaneously, and pressure ram and walking beam move forward synchronously, and flat blank is extruded through mould, forms extrusion and sends from the outlet of the front beam outside;
(6) thermometric and cooling: in exit, the described front beam outside, thermometric-cooling system starts in real time, and according to actual outlet temperature control intensity of cooling;
(7) hauling machine clamps extrusion by hold assembly, and extrusion is applied enough hightensions, guarantees that extrusion is straight not bend or warpage, and moves apart operating desk;
(8) cut out finishing: cutting device is cut out the finishing of trimming to extrusion;
(9) reset: major and minor oil cylinder oil return, pressure ram-walking beam is return initial position to the right; Recipient retreats (moving to right) to initial position along its guide rail; Be installed on the scissor action of top, front beam right side, wipe out blank residual on the mould, make die frame-mould reply the state of preparing extruding.
4. the extrusion process of wide cut section bar according to claim 3 and sheet material, it is characterized in that described flat extrusion chamber is that the side is the flat rectangular inner chamber of circular arc, height * wide=(200～300) * (700～800) mm, described flat blank are the corresponding to it magnesium alloy annealing of geomery ingot castings; Total nominal pressure of described combination hydraulic system is 4500～8000 tons; Horizontal index power 〉=200 of described hauling machine ton.
CN2008102285772A 2008-11-04 2008-11-04 Broad-width extrusion device and technique thereof Active CN101391269B (en)

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PCT/CN2009/074791 WO2010051754A1 (en) 2008-11-04 2009-11-04 Broad-width extrusion device and extrusion process thereof

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Application Number Priority Date Filing Date Title
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CN101391269B true CN101391269B (en) 2011-01-19

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CN104128383B (en) * 2014-08-14 2016-01-20 昆明理工大学 A kind of method of continuous jam and device
CN105195540A (en) * 2015-09-23 2015-12-30 苏州华冲精密机械有限公司 Bi-directional aluminum profile extruding machine
CN105170678A (en) * 2015-09-23 2015-12-23 苏州华冲精密机械有限公司 Aluminum profile extruding machine
CN106180238A (en) * 2016-08-29 2016-12-07 无锡市源昌机械制造有限公司 The extruder of multifunctional working end cap is installed
CN109351794A (en) * 2018-12-11 2019-02-19 湖南千源铝业有限公司 A kind of extrusion forming device for aluminium alloy extrusions
CN109663829B (en) * 2019-02-16 2020-05-29 淮北市君意达金属科技有限责任公司 Precision aluminum profile extrusion forming equipment
CN110711790B (en) * 2019-10-18 2020-05-29 宁波埃尔法流体技术有限公司 High accuracy aluminum alloy ex-trusions extruder of environment-friendly
CN110802121A (en) * 2019-11-11 2020-02-18 苏州沅德精密技术有限公司 Aluminum extrusion forming process
CN111299344B (en) * 2020-02-24 2021-09-24 浙江久丰铝业有限公司 Aluminum profile machining system
CN114192597B (en) * 2021-11-10 2023-12-26 佛山市三水凤铝铝业有限公司 Equipment for producing section bar
CN114522993A (en) * 2021-12-31 2022-05-24 无锡市源昌机械制造有限公司 Extrusion process for ultra-wide aluminum alloy section
CN116037691B (en) * 2022-12-22 2023-12-22 江苏美霖铜业有限公司 Shearing flaw detection system
CN117415356B (en) * 2023-12-14 2024-03-12 成都易格机械有限责任公司 Device and method for precisely and efficiently machining shaft parts at multiple stations

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CN201279529Y (en) * 2008-11-04 2009-07-29 大连交通大学 Wide-amplitude extruding device

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Owner name: BEIJING HUASHENGRONG MAGNESIUM SCIENCE AND TECHNOL

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Effective date of registration: 20110902

Address after: 116028 the Yellow River Road, Shahekou District, Liaoning, No. 794, No.

Co-patentee after: Beijing Huashengrong Magnesium Industry Technology Co., Ltd.

Patentee after: Dalian Jiaotong University

Address before: 116028 the Yellow River Road, Shahekou District, Liaoning, No. 794, No.

Patentee before: Dalian Jiaotong University