CN106077655A - A kind of pulsed discharge aluminium section bar process units and method - Google Patents

A kind of pulsed discharge aluminium section bar process units and method Download PDF

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Publication number
CN106077655A
CN106077655A CN201610613411.7A CN201610613411A CN106077655A CN 106077655 A CN106077655 A CN 106077655A CN 201610613411 A CN201610613411 A CN 201610613411A CN 106077655 A CN106077655 A CN 106077655A
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CN
China
Prior art keywords
graphite
section bar
hopper
aluminium section
aluminum
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Pending
Application number
CN201610613411.7A
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Chinese (zh)
Inventor
曹国剑
王月月
冯义成
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Priority to CN201610613411.7A priority Critical patent/CN106077655A/en
Publication of CN106077655A publication Critical patent/CN106077655A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/1035Liquid phase sintering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/105Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/105Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • B22F2003/1051Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B22F2003/208Warm or hot extruding

Abstract

A kind of pulsed discharge aluminium section bar process units and method, relate to a kind of discharge plasma aluminium section bar process units and method, belong to shape preparing technical field;The invention aims to solve that existing aluminium section bar production technology stock utilization is low, production process produces the problems such as a large amount of waste materials;The present invention includes that graphite nozzle, ceramic washer, graphite is pullover, graphite sleeve, metal shell, air inlet, hopper cover, hopper, motor, anode, main shaft, negative electrode, the present invention be on the basis of conventional aluminum section bar manufacture, add that graphite nozzle, ceramic washer, graphite is pullover, graphite sleeve, negative electrode and anode carry out pulsed discharge, raw material uses the aluminum bits of residual processing, after aluminum bits are put into hopper, push in graphite sleeve, two ends apply high power pulse electric current makes aluminum bits melt, and then molten aluminum considers to be worth doing extrusion nozzle molding;The present invention can effectively utilize waste aluminum to consider to be worth doing, to reach the purpose of environmental protection.

Description

A kind of pulsed discharge aluminium section bar process units and method
Technical field
The present invention relates to a kind of discharge plasma aluminium section bar process units and method, belong to shape technology of preparing neck Territory.
Background technology
Along with the development of science and technology, people are increasing to the demand of material and the energy, on the one hand need us to develop new energy Source and exploitation raw material, from the angle of sustainable development, with greater need for from how saving the energy, and the most more make full use of raw material Angle seek new solution.Just think if able to laughable tank that used material, such as aluminum are done, remain after processing Cutting swarf, it is possible to recycling, then can successfully manage problem above.
Traditional shape is typically to be utilized the cold rolling or equipment of hot rolling of specialty by steel mill or various section bar specialized factory Manufacturing, such as all types of steel & aluminum section steel etc., the shape of these section bars, specification etc. are all according to certain international standard, country Standard or industry standard carry out manufacturing, and for needs of production, existing shape manufactures equipment and manufacturer Method exists following not enough: first, and section rolling mode cost is high, and thin-wall section process technology difficulty is big;Second, the shape of section bar Shape, specification standardization, have the shape of the cross sectional shape of specific demand, specification for some, it is difficult to meet requirement;3rd, The supply of material length of product forms is usually no more than 12m, it is impossible to continuous application on a production line.
Process of pulse discharge is in addition to the Joule heat with hot pressed sintering and plastic deformation acceleration of sintering process, also at powder Intergranular produces DC pulse voltage, and is effectively utilized between powder granule the spontaneous heating effect produced of discharging.Thus create one The specific phenomenon being conducive to heating of a little process of pulse discharges.First, due to pulsed discharge produce discharge impact ripple and The most reciprocal flow at high speed of electronics, ion, can make the gas escape of powder adsorption.The initial oxidation film on powder surface The most breakdown, make powder be purified, activate;Second, owing to pulse is moment, interrupted, altofrequency generation, At the heat discharge that powder particle produces not in contact with position, and the Joule heat that powder particle contact site produces, all greatly promote The diffusion of powder particle atom, much greater than under usual hot pressing condition of its diffusion coefficient, thus reach the quick of powder Fusing;The addition of the 3rd, On-Off fast-pulse, makes the electric discharge position in powder and joule heat parts, all can quickly move Dynamic, enable the heating homogenization of powder.
Summary of the invention
The invention aims to solve that existing shape production technology stock utilization is low, production process produces A large amount of waste materials, the problem problems such as prepared material density is low, the invention provides a kind of pulsed discharge aluminium section bar and produce dress Put and method.
A kind of pulsed discharge aluminium section bar process units, it include graphite nozzle (1), ceramic washer (2), graphite pullover (3), Graphite sleeve (4), metal shell (5), air inlet (6), hopper cover (7), hopper (8), motor (9), anode (10), main shaft (11), bolt hole (12), negative electrode (13);Described hopper cover (7) is that axle is connected with hopper (8), described ceramic washer (2) position Between metal shell (5) and graphite nozzle (1), metal shell (5) is internal is provided with main shaft (11), this main shaft (11) outer surface Having screw thread, left section is triangle, is enclosed within graphite pullover (3) internal, and root is connected with motor (9) and anode (10) connects, metal Embed on shell (5) inwall and be fixed with columnar graphite sleeve (4), this graphite sleeve (4) right-hand member and ceramic washer (2) right-hand member Between distance be L1, the sidewall of metal shell (5) is fixed with hopper (8), and the bottom of hopper (8) and metal shell (5) Inner space, the air line distance that this hopper (8) closes between the side of ceramic washer (2) and ceramic washer (2) right-hand member is big In L1, graphite nozzle (1) bottom righthand side is connected with negative electrode (13).
The big footpath of described main shaft (11) outer surface thread is equal with metal shell (5) internal diameter.
Described ceramic washer (2) is positioned between metal shell (5) and graphite nozzle (1), for isolating metal shell (5) With graphite nozzle (1).
A kind of pulsed discharge aluminium section bar process units described in employing realizes the method that aluminium section bar produces, described production aluminium profiles The process of the method for material is, first makes described negative electrode (13) be positioned at graphite nozzle (1) bottom righthand side, and anode (10) is positioned at main shaft (11) at root, being passed through argon by air inlet (6), ar pressure is more than an atmospheric pressure, by hopper (8) outside metal The inner chamber of shell (5) adds aluminum bits, then covers tightly airtight for hopper cover (7), opens motor (9), drives main shaft (11) to rotate, logical Crossing the screw thread on main shaft (11) makes aluminum bits enter graphite sleeve (4) and graphite nozzle (1) is interior, anode (10) and negative electrode (13) it Between current pulse, heating aluminum bits, be positioned at graphite nozzle (1), between graphite pullover (3) and graphite sleeve (4) aluminum bits generation Fusing, is considered to be worth doing the aluminum being in molten condition and is extruded by graphite nozzle (1), by changing different graphite nozzle (1), can squeeze Go out difform aluminium section bar, open hopper (8) in hopper (8), add aluminum bits, close hopper cover (7), pass through air inlet (6) being passed through argon, the aluminum of molten condition is constantly considered to be worth doing extrusion continuously by the screw thread on the main shaft (11) of rotation, is the most constantly considered to be worth doing by aluminum It is sent to graphite sleeve (4) internal, then can realize continuous non-waste section bar Die Casting process.
The pulse frequency of described pulse current is 5~200Hz, and the size of current of pulse current is 200~8000A DC-pulse.
The present invention is that to add graphite nozzle (1), ceramic washer (2), graphite on the basis of conventional aluminum section bar manufactures pullover (3), graphite sleeve (4), negative electrode (13) and anode (10) carry out pulsed discharge, raw material uses the aluminum bits of residual processing, is considered to be worth doing by aluminum After putting into hopper, pushing in graphite sleeve (4), two ends apply high power pulse electric current makes aluminum bits melt, then by molten aluminum bits extrusion Nozzle molding.
Present invention achieves aluminium section bar and produce energy efficient 15%~30%, complex component can be prepared, the material of preparation Density improve 2%~10%, performance good.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of pulsed discharge aluminium section bar process units of the present invention;
Fig. 2 is during the aluminium section bar production method described in detailed description of the invention four is carried out aluminum bits heating, aluminum bits heating Time view;
Fig. 3 is after the aluminium section bar production method described in detailed description of the invention six is carried out aluminum bits heating, when aluminum bits are melted View;
Fig. 4 is the structural representation of a kind of pulsed discharge aluminium section bar process units circular graphitic nozzle (1) of the present invention;
Fig. 5 is the structural representation of a kind of pulsed discharge aluminium section bar process units square graphite nozzle (1) of the present invention;
Fig. 6 is the structural representation of a kind of pulsed discharge aluminium section bar process units groove type graphite nozzle (1) of the present invention Figure;
Fig. 7 is the structural representation of a kind of pulsed discharge aluminium section bar process units I shape graphite nozzle (1) of the present invention Figure.
Detailed description of the invention
Detailed description of the invention one: see Fig. 1 and present embodiment is described, it include graphite nozzle (1), ceramic washer (2), Graphite pullover (3), graphite sleeve (4), metal shell (5), air inlet (6), hopper cover (7), hopper (8), motor (9), anode (10), main shaft (11), bolt hole (12), negative electrode (13);Described hopper cover (7) is that axle is connected with hopper (8), described pottery Packing ring (2) is positioned between metal shell (5) and graphite nozzle (1), and metal shell (5) is internal is provided with main shaft (11), this main shaft (11) outer surface has screw thread, and left section is triangle, is enclosed within graphite pullover (3) internal, and root is connected with motor (9) and anode (10) Connect, metal shell (5) inwall embeds and is fixed with columnar graphite sleeve (4), this graphite sleeve (4) right-hand member and ceramic blanket Distance between circle (2) right-hand member is L1, the sidewall of metal shell (5) is fixed with hopper (8), and the bottom of hopper (8) is with golden Belonging to the inner space of shell (5), this hopper (8) closes between the side of ceramic washer (2) and ceramic washer (2) right-hand member Air line distance is more than L1, and graphite nozzle (1) bottom righthand side is connected with negative electrode (13).
Detailed description of the invention two: present embodiment produces with a kind of pulsed discharge aluminium section bar described in detailed description of the invention one The difference of device is, the big footpath of described main shaft (11) outer surface thread is equal with metal shell (5) internal diameter.
Detailed description of the invention three: present embodiment produces with a kind of pulsed discharge aluminium section bar described in detailed description of the invention one The difference of device is, described ceramic washer (2) is positioned between metal shell (5) and graphite nozzle (1), for isolating metal Shell (5) and graphite nozzle (1).
Detailed description of the invention four: see Fig. 2-Fig. 7 and illustrate that present embodiment, present embodiment are to use specific embodiment party A kind of pulsed discharge aluminium section bar process units described in formula one realizes the method that aluminium section bar produces, the method that described aluminium section bar produces Process be first to make described negative electrode (13) be positioned at graphite nozzle (1) bottom righthand side, anode (10) is positioned at main shaft (11) root Place, is passed through argon by air inlet (6), and ar pressure is more than an atmospheric pressure, by hopper (8) to metal shell (5) Inner chamber adds aluminum bits, then covers tightly airtight for hopper cover (7), opens motor (9), drives main shaft (11) to rotate, passes through main shaft (11) screw thread on makes aluminum bits enter in graphite sleeve (4) and graphite nozzle (1), promotes blood circulation between anode (10) and negative electrode (13) Rush electric current, heating aluminum bits, it is positioned at graphite nozzle (1), aluminum between graphite pullover (3) and graphite sleeve (4) is considered to be worth doing and melted, The aluminum being in molten condition is considered to be worth doing and is extruded by graphite nozzle (1), by changing different graphite nozzle (1), can extrude not The aluminium section bar of similar shape, opens hopper (8) and adds aluminum bits in hopper (8), close hopper cover (7), continue through air inlet (6) being passed through argon, the aluminum of molten condition is constantly considered to be worth doing extrusion continuously by the screw thread on the main shaft (11) of rotation, is the most constantly considered to be worth doing by aluminum It is sent to graphite sleeve (4) internal, then can realize continuous non-waste section bar Die Casting process.
Detailed description of the invention five: the pulse frequency of described pulse current is 5~200Hz, the size of current of pulse current It it is the DC-pulse of 200~8000A.
In present embodiment, between powder particle, also produce DC pulse voltage, produce between granule under pulse current effect Raw electric discharge, excites plasma, and by effectively utilizing the spontaneous heating effect produced of discharging between powder granule, this device creates one The most distinctive phenomenon being conducive to powder rapid melting.First, due to pulsed discharge produce discharge impact ripple and electronics, from The most reciprocal flow at high speed of son, can make the gas escape of powder adsorption, and the initial oxidation film on powder surface is necessarily In degree breakdown, make powder be purified, activate;Second, owing to pulse is moment, interrupted, altofrequency generation, at powder The heat discharge that granule produces not in contact with position, and the Joule heat that powder particle contact site produces, be all greatly facilitated powder The diffusion of granule atom, much greater than under usual hot pressing condition of its diffusion coefficient, thus reach powder rapid melting;The The addition of three, On-Off fast-pulse, makes the electric discharge position in powder and joule heat parts, all can quickly move, make powder Heating can homogenization.Making pulse concentrate on crystal grain junction is the feature that DC-pulse applies process.Direct current arteries and veins During punching electricity applies, between granule during electric discharge, the instantaneous generation of meeting is up to the localized hyperthermia of thousand of degree to 10,000 degree, thus accelerates The fusing of granule, in general, the implementation process of this device can be regarded as granule electric discharge, the knot of conductive heater comprehensive function Really.
In process of pulse discharge, between granule during electric discharge, the local that the instantaneous generation of meeting is up to thousand of degree to 10,000 degree is high Temperature, causes evaporation and fusing at particle surface;Cervical region is formed, due to heat immediately from the transmission of heating center at grain contact point Spreading to particle surface with to surrounding, cervical region quickly cools down and makes vapour pressure be less than other positions, accelerates densification process.
The present invention utilizes pulsed discharge sintering technology so that the quickly heating of aluminum bits reaches fusing or semi-solid state, fast Rapid-result type.So can realize twice laid, such as remaining cutting swarf after processing, the metal after using, wait as raw material ;Realize energy-saving and emission-reduction, owing to the efficiency of pulsed discharge is high, the energy consumption of metal molten can be reduced;The material that processability is excellent Material, the material prepared by pulsed discharge has even tissue, and crystal grain is tiny so that the performance of material is improved, And realize producing continuously;Can also carry out some fragile material processing and manufacture, directly after processing, remaining cutting swarf is made Finished section bar, it is not necessary to carry out intermediate treatment, can reduce the loss that fragile material causes due to the course of processing.

Claims (5)

1. a pulsed discharge aluminium section bar process units, it is characterised in that it includes graphite nozzle (1), ceramic washer (2), stone Ink pullover (3), graphite sleeve (4), metal shell (5), air inlet (6), hopper cover (7), hopper (8), motor (9), anode (10), main shaft (11), bolt hole (12), negative electrode (13);Described hopper cover (7) is that axle is connected with hopper (8), described pottery Porcelain packing ring (2) is positioned between metal shell (5) and graphite nozzle (1), and metal shell (5) is internal is provided with main shaft (11), this main shaft (11) outer surface has screw thread, and left section is triangle, is enclosed within graphite pullover (3) internal, and root is connected with motor (9) and anode (10) Connect, metal shell (5) inwall embeds and is fixed with columnar graphite sleeve (4), this graphite sleeve (4) right-hand member and ceramic blanket Distance between circle (2) right-hand member is L1, the sidewall of metal shell (5) is fixed with hopper (8), and the bottom of hopper (8) is with golden Belonging to the inner space of shell (5), this hopper (8) closes between the side of ceramic washer (2) and ceramic washer (2) right-hand member Air line distance is more than L1, and graphite nozzle (1) bottom righthand side is connected with negative electrode (13).
2. according to a kind of pulsed discharge aluminium section bar process units described in claim 1, it is characterised in that described main shaft (11) the big footpath of outer surface thread is equal with metal shell (5) internal diameter.
3. according to a kind of pulsed discharge aluminium section bar process units described in claim 1, it is characterised in that described ceramic washer (2) it is positioned between metal shell (5) and graphite nozzle (1), for isolating metal shell (5) and graphite nozzle (1).
4. use a kind of pulsed discharge aluminium section bar process units described in claim 1 to realize the method that aluminium section bar produces, its Being characterised by, the process of described aluminium section bar production method is: first make described negative electrode (13) be positioned at graphite nozzle (1) right Lower end, anode (10) is positioned at main shaft (11) root, is passed through argon by air inlet (6), and ar pressure is more than an atmospheric pressure, Add aluminum by hopper (8) to the inner chamber of metal shell (5) to consider to be worth doing, then cover tightly airtight for hopper cover (7), open motor (9), drive main shaft (11) to rotate, make aluminum bits enter graphite sleeve (4) and graphite nozzle (1) by the screw thread on main shaft (11) In, current pulse between anode (10) and negative electrode (13), heating aluminum consider to be worth doing, be positioned at graphite nozzle (1), graphite pullover (3) and Aluminum bits between graphite sleeve (4) melt, and are considered to be worth doing by the aluminum being in molten condition and are extruded by graphite nozzle (1), by more Change different graphite nozzle (1), difform aluminium section bar can be extruded, open hopper (8) in hopper (8), add aluminum bits, Closing hopper cover (7), continue through air inlet (6) and be passed through argon, the screw thread on the main shaft (11) of rotation is constantly by molten condition Aluminum bits continuously extrusion, the most constantly aluminum bits are sent to graphite sleeve (4) internal, then can realize continuous non-waste section bar pressure Casting production process.
Method the most according to claim 4, it is characterised in that the pulse frequency of described pulse current is 5~200Hz, The size of current of pulse current is the DC-pulse of 200~8000A.
CN201610613411.7A 2016-08-01 2016-08-01 A kind of pulsed discharge aluminium section bar process units and method Pending CN106077655A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112024629A (en) * 2019-12-18 2020-12-04 哈尔滨理工大学 Method for preparing semi-solid blank by pulse current

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1066808A (en) * 1992-06-26 1992-12-09 冶金工业部钢铁研究总院 Screw propulsion style continuous extruding forming device
JPH06304733A (en) * 1993-04-21 1994-11-01 Japan Steel Works Ltd:The Injection molding method for low melting metallic material and apparatus therefor
US20010004931A1 (en) * 1999-12-24 2001-06-28 Nissei Plastic Industrial Co., Ltd. Injection apparatus for melted metals
WO2003018233A1 (en) * 2001-08-23 2003-03-06 Commonwealth Scientific And Industrial Research Organisation Process and apparatus for producing shaped metal parts
CN103008601A (en) * 2013-01-23 2013-04-03 哈尔滨理工大学 Pulse discharge auxiliary die-casting device and method
CN205834242U (en) * 2016-08-01 2016-12-28 哈尔滨理工大学 A kind of pulsed discharge aluminium section bar process units

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1066808A (en) * 1992-06-26 1992-12-09 冶金工业部钢铁研究总院 Screw propulsion style continuous extruding forming device
JPH06304733A (en) * 1993-04-21 1994-11-01 Japan Steel Works Ltd:The Injection molding method for low melting metallic material and apparatus therefor
US20010004931A1 (en) * 1999-12-24 2001-06-28 Nissei Plastic Industrial Co., Ltd. Injection apparatus for melted metals
WO2003018233A1 (en) * 2001-08-23 2003-03-06 Commonwealth Scientific And Industrial Research Organisation Process and apparatus for producing shaped metal parts
CN103008601A (en) * 2013-01-23 2013-04-03 哈尔滨理工大学 Pulse discharge auxiliary die-casting device and method
CN205834242U (en) * 2016-08-01 2016-12-28 哈尔滨理工大学 A kind of pulsed discharge aluminium section bar process units

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112024629A (en) * 2019-12-18 2020-12-04 哈尔滨理工大学 Method for preparing semi-solid blank by pulse current

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