CN104525598B - A kind of ultra-fine/fine grain bar preparation technology and its device - Google Patents
A kind of ultra-fine/fine grain bar preparation technology and its device Download PDFInfo
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- CN104525598B CN104525598B CN201410750190.9A CN201410750190A CN104525598B CN 104525598 B CN104525598 B CN 104525598B CN 201410750190 A CN201410750190 A CN 201410750190A CN 104525598 B CN104525598 B CN 104525598B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000005516 engineering process Methods 0.000 title abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 29
- 239000011230 binding agent Substances 0.000 claims description 27
- 230000006698 induction Effects 0.000 claims description 14
- 230000033001 locomotion Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000704 physical effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 241001417495 Serranidae Species 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 2
- GETQKLUOZMYHGE-UHFFFAOYSA-N 2-[[3-(3,6-dichlorocarbazol-9-yl)-2-hydroxypropyl]amino]-2-(hydroxymethyl)propane-1,3-diol Chemical compound ClC1=CC=C2N(CC(O)CNC(CO)(CO)CO)C3=CC=C(Cl)C=C3C2=C1 GETQKLUOZMYHGE-UHFFFAOYSA-N 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Abstract
It is ultra-fine（Carefully）Crystal bar material preparation technology and its device, belong to metal forming field, particularly in order to obtaining ultra-fine（Carefully）Crystal bar material, has invented the continuous acutely plastic deformation process of a set of isothermal, it is characterised in that isothermal continuous acutely deformation device and its Row control.This technique efficiently solves existing equal channel angular pressing technology and can only prepare the less blank of length, is adapted to using extruded barses as blank, prepares with ultra-fine（Carefully）Brilliant bar long, can be used to industrialize continuous production.
Description
Technical field
The present invention relates to the preparation method of ultra-fine/fine grain bar, and in particular to the continuous acutely isothermal deformation method of bar long,
Belong to Materials Processing Engineering/forging and stamping/extrusion molding field.
Background technology
Severe plastic deformation is the main method for preparing ultra-fine/grained material, and its basic skills is one connection of processing
The angle of vertical die cavity and lateral type cavity mould, vertical die cavity and lateral die cavity center line at 90 ° or so, vertical die cavity and lateral
The corner fillet radius of die cavity only has 0.5 ~ 2mm, and blank produces huge detrusion, equivalent strain in extrusion process
Reach more than 0.8 so that blank crystal grain is fined.Typical severe plastic deformation technique uses single detrusion
Angular extrusion method (Equal-Channel Angular Pressing, ECAP), multiple tracks subchannel of multiple detrusions etc.
Angular extrusion method (Multi-pass ECAP), reciprocating Equal Channel Angular Pressing method (Side-Extrusion ECAP).However,
Existing various Equal Channel Angular Pressing methods, usually by mould and blank heating to forming temperature after, blank is positioned over mould
Vertical die cavity in, using upper punch extrusion billet by corner violent detrusion complete, due to device itself
Limitation, is not suitable for industrializing continuous production.Therefore in industrial circle, the application of the severe plastic deformation technique based on EACP has
Larger limitation.
So far, in the industrial production, can be DCAP techniques with quantity-produced severe plastic deformation device
（Dissimilar-Channel Angular Pressing Process）, the principle of the technique is led using two or more
Rail wheel and home roll are blank positioning, force blank to produce violent plasticity to become with the frictional force that blank is produced using home roll and mould
Shape, this process is suitable for having the device for producing larger frictional force（As there is larger contact between blank and mould
Face）.Similar technique also has conjugated shear technique（Conshearing Process）With the continuous extruding technology based on EACP
（ECAP–Conform Process）.For prepared by ultra-fine/fine grain large scale bar, this several continuous acutely deformation technique
Be not suitable for, subject matter is small contact surface, centripetal force is not enough to produce severe plastic deformation.
The content of the invention
Continuous acutely plastic deformation process is prepared process provides industrial ultra-fine/fine grain bar is suitable for, and
There is provided the device for realizing the technique.Purpose is in effectively overcoming existing suitable quantity-produced severe plastic deformation device
The problem of presence, while the method for setting up bar isothermal severe plastic deformation.
The present invention provide a kind of building mortion for preparing ultra-fine/fine grain bar long, it by upper mould, upper mould adding thermal resistance,
Lower mould, lower mould adding thermal resistance, upper fixed block, transmission rod, binder block, external induction heating apparatus, drawing-inroller composition；The device
Main modular is：
(1) severe plastic deformation device, is made up of upper mould, upper mould adding thermal resistance, lower mould, lower mould adding thermal resistance；
(2) blank unloading device, is made up of upper fixed block, guide pillar, binder block；
(3) multistep feed device, servomechanism installation is constituted with drawing-inroller.
The movement characteristic of building mortion is：
(1) after upper mould is moved downward, multistep feed device stops feeding, and unloading device binder block processed is also moved with upper mould
And blank is touched prior to upper mould, certain pressure is applied to blank before being deformed so that the not deformed area of blank is in relative
Inactive state；
(2) after upper mould has extruded blank, upper mould and unloading device binder block processed are moved upwards simultaneously, when unloading device binder processed
Block is not produced after contacting with blank, and to feeding in die cavity, feed length is 0.25 ~ 10mm to multistep feed device.
Building mortion thermal environment feature is：Blank is carried out using external induction heating apparatus in feeding process to blank
Local heating；Resistance heating manner is used before being deformed, realizes the heating to upper/lower die.
Prepare the isothermal severe plastic deformation process of ultra-fine/fine grain bar long, it is characterised in that：
(1) severe plastic deformation, lower mould fix in the case of, according to upper mould vertical direction reciprocating motion, it is ensured that
Blank (10) bears severe plastic deformation during feeding；
(2) ausforming environment, upper mould adding thermal resistance, lower mould adding thermal resistance, external induction heating apparatus cause mould, base
Material temperature gap in forming process is less than 50 DEG C.
The building mortion is arranged on mechanical press, is realized using the up-and-down movement of mechanical press continuous
Severe plastic deformation.
4 brief description of the drawings
Fig. 1 is the general structure of device, while it is each component present position schematic diagram when shaping is completed to be
Each component present position schematic diagram when Fig. 2 is hanging device
Each component present position schematic diagram when Fig. 3 is device binder
5 specific embodiments
Below against accompanying drawing, case study on implementation of the invention is described in detail.
Fig. 1 is typical continuous acutely deformation device, it by upper mould (1), the built-in adding thermal resistance of upper mould (2), lower mould (3),
Lower mould adding thermal resistance (4), upper fixed block (5), transmission rod (6), binder block (7), external induction heating apparatus (8), drawing-inroller group
Into (9).Wherein go up mould (1), upper mould adding thermal resistance (2), lower mould (3), lower mould adding thermal resistance (4) composition severe plastic deformation dress
Put；Upper fixed block (5), transmission rod (6), binder block (7) composition swage module；Drawing-inroller composition (9) configuration servo-control system
Composition feed device.
Forming process：Upper mould is moved into upper change point first（As shown in Figure 2）, by 0.5 ~ 5mm of multistep feed device feeding；
After upper mould is moved downward, multistep feed device stops feeding, and unloading device binder block processed is also with motion under upper mould and prior to upper mould
Blank is touched, certain pressure is applied to blank before being deformed so that the not deformed area of blank is in relative static conditions（Such as
Shown in Fig. 3）；Upper mould is continued traveling downwardly so that blank produces severe plastic deformation（As shown in Figure 1）；After upper mould has extruded blank,
Upper mould and unloading device binder block processed motion upwards simultaneously, upper mould reach after top dead center, and feed device starts feeding, repeats a new round
Distance plastic deformation.
Case study on implementation 1
Raw material：φ 80mm aluminium alloy 7A04 bars
Specific operation is as follows：
(1) mould heating-up temperature is heated to 400 DEG C by built-in resistor first；
(2) blank is by external induction heating apparatus continuous heating, maximum temperature to 450 DEG C, external induction heating apparatus
Heating power is determined by feed rate and blank thermal physical property parameter；
(3) by multistep feed device feeding, after blank enters 0.5 ~ 5mm of shaped opening, multistep feed device stops feeding；
(4) after upper mould is moved downward, unloading device binder block processed also touches blank with motion under upper mould and prior to upper mould,
Certain pressure is applied to blank before being deformed so that the not deformed area of blank is in relative static conditions；
(5) after upper mould has extruded blank, upper mould and unloading device binder block processed are moved upwards simultaneously, when unloading device binder processed
Block is not produced after contacting with blank, and to feeding in die cavity, feed length is 0.5 ~ 5mm to multistep feed device；
(6) 4 ~ 5 steps are repeated, the continuous severe plastic deformation of 7A04 aluminium alloys is completed.
Case study on implementation 2
Raw material：φ 80mm magnesium alloy MB15 bars
Specific operation is as follows：
(1) mould heating-up temperature is heated to 320 DEG C by built-in resistor first；
(2) blank is by external induction heating apparatus continuous heating, maximum temperature to 410 DEG C, external induction heating apparatus
Heating power is determined by feed rate and blank blank thermal physical property parameter；
(3) by multistep feed device feeding, after blank enters 0.5 ~ 5mm of shaped opening, multistep feed device stops feeding；
(4) after upper mould is moved downward, unloading device binder block processed also touches blank with motion under upper mould and prior to upper mould,
Certain pressure is applied to blank before being deformed so that the not deformed area of blank is in relative static conditions；
(5) after upper mould has extruded blank, upper mould and unloading device binder block processed are moved upwards simultaneously, when unloading device binder processed
Block is not produced after contacting with blank, and to feeding in die cavity, feed length is 0.5 ~ 5mm to multistep feed device；
(6) 4 ~ 5 steps are repeated, the continuous severe plastic deformation of MB15 magnesium alloys is completed.
Claims (7)
1. a kind of preparation facilities for preparing ultra-fine/fine grain bar long, it is by upper mould, upper mould adding thermal resistance, lower mould, lower mould heating electricity
Resistance,
Upper fixed block, transmission rod, binder block, external induction heating apparatus, drawing-inroller composition；It is characterized in that：Upper mould, upper mould add
Thermal resistance, lower mould, lower mould adding thermal resistance composition severe plastic deformation device；Upper fixed block, guide pillar, binder block composition blank system
Unloading device；Drawing-inroller coordinates servomechanism installation composition multistep feed device.
2. a kind of preparation facilities for preparing ultra-fine/fine grain bar long as claimed in claim 1, it is characterised in that：Upper mould to
After lower motion, multistep feed device stops feeding, and binder block is also moved downward with upper mould and touches blank prior to upper mould,
Certain pressure is applied to blank before deformation so that the not deformed area of blank is in relative static conditions；Base has been extruded in upper mould
After material, upper mould and binder block are moved upwards simultaneously, and after binder block is not produced with blank to be contacted, multistep feed device is to die cavity
Interior feeding, feed length is 0.5 ~ 5mm.
3. a kind of preparation facilities for preparing ultra-fine/fine grain bar long as claimed in claim 1, it is characterised in that blank is sending
During material, local heating is carried out to blank using external induction heating apparatus, form ausforming environment.
4. a kind of preparation facilities for preparing ultra-fine/fine grain bar long as claimed in claim 1, it is characterised in that：The preparation is filled
Put installed in mechanical press and other have in the equipment of fixed reciprocator.
5. a kind of isothermal severe plastic deformation process for preparing ultra-fine/fine grain bar long, it is characterised in that：(I) acutely modeling
Property deformation, lower mould fix in the case of, according to upper mould vertical direction reciprocating motion, it is ensured that blank feeding process
In bear severe plastic deformation；(II) isothermal forming mould, upper mould adding thermal resistance, lower mould adding thermal resistance, external sensing heating
Device causes that mould, the blank temperature gap in forming process are less than 50 DEG C.
6. a kind of isothermal severe plastic deformation process for preparing ultra-fine/fine grain bar long as claimed in claim 5, it is special
Levy and be：Using 7A04 rodss and bars of aluminium alloy, its deformation process is：(1) mould heating-up temperature is heated by built-in resistor first
To 400 DEG C；(2) blank is by external induction heating apparatus continuous heating, maximum temperature to 450 DEG C, external induction heating apparatus
Heating power determined by feed rate and blank thermal physical property parameter；(3) by multistep feed device feeding, shaped when blank enters
After 0.5 ~ 5mm of mouth, multistep feed device stops feeding；(4) after upper mould is moved downward, binder block under upper mould also with moving simultaneously
Blank is touched prior to upper mould, certain pressure is applied to blank before being deformed so that the not deformed area of blank is in relatively quiet
Only state；(5) after upper mould has extruded blank, upper mould and binder block are moved upwards simultaneously, are connect when binder block is not produced with blank
After touch, to feeding in die cavity, feed length is 0.5 ~ 5mm to multistep feed device；(6) 4 ~ 5 steps are repeated, 7A04 is completed
The continuous severe plastic deformation of aluminium alloy.
7. a kind of isothermal severe plastic deformation process for preparing ultra-fine/fine grain bar long, it is characterised in that：Using MB15 magnesium
Alloy bar material, its deformation process is：(1) mould heating-up temperature is heated to 320 DEG C by built-in resistor first；(2) base
, by external induction heating apparatus continuous heating, to 410 DEG C, the heating power of external induction heating apparatus is by entering for maximum temperature for material
Determine to speed and blank blank thermal physical property parameter；(3) by multistep feed device feeding, when blank enter shaped opening 0.5 ~
After 5mm, multistep feed device stops feeding;(4) after upper mould is moved downward, unloading device binder block processed is also moved downward with upper mould
And blank is touched prior to upper mould, certain pressure is applied to blank before being deformed so that the not deformed area of blank is in relative
Inactive state;(5) after upper mould has extruded blank, upper mould and unloading device binder block processed are moved upwards simultaneously, when unloading device processed
Binder block is not produced after contacting with blank, and to feeding in die cavity, feed length is 0.5 ~ 5mm to multistep feed device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410750190.9A CN104525598B (en) | 2014-12-10 | 2014-12-10 | A kind of ultra-fine/fine grain bar preparation technology and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410750190.9A CN104525598B (en) | 2014-12-10 | 2014-12-10 | A kind of ultra-fine/fine grain bar preparation technology and its device |
Publications (2)
| Publication Number | Publication Date |
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| CN104525598A CN104525598A (en) | 2015-04-22 |
| CN104525598B true CN104525598B (en) | 2017-06-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106964685A (en) * | 2017-04-12 | 2017-07-21 | 苏州汇程精密模具有限公司 | A kind of die cutting die with sectional temperature control function |
| CN107335688A (en) * | 2017-09-07 | 2017-11-10 | 烟台大学 | Can electrically heated extruding die for aluminum shaped material in a kind of extrusion process |
| CN110000281A (en) * | 2019-04-26 | 2019-07-12 | 蓝达(杭州)办公设备有限公司 | Carbon steel diamond shape silk screen office appliance cuts pull-type net forming equipment processed and forming method |
| CN112620371B (en) * | 2020-12-23 | 2022-05-24 | 太原理工大学 | Device and method for preparing fine-grain magnesium alloy through reciprocating torsional extrusion deformation |
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| JP2001321825A (en) * | 2000-05-18 | 2001-11-20 | Toto Ltd | Method and device for working metallic material |
| CN2612474Y (en) * | 2003-04-11 | 2004-04-21 | 中国科学院力学研究所 | Device for preparing continuous nanometer crystalline metal material |
| JP2004351486A (en) * | 2003-05-29 | 2004-12-16 | Matsushita Electric Ind Co Ltd | Method and apparatus for manufacturing magnesium alloy plate |
| CN1298450C (en) * | 2005-06-16 | 2007-02-07 | 上海交通大学 | Broken line type extrusion shaping apparatus |
| CN102233364B (en) * | 2010-04-21 | 2013-09-04 | 宝山钢铁股份有限公司 | Martensite air valve steel bar production method |
| CN203751019U (en) * | 2014-01-28 | 2014-08-06 | 徐州工程学院 | Mold for preparing ultrafine-grained bulk material |
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Effective date of registration: 20240410 Address after: 400039 Chongqing Jiulongpo Yuzhou Road No. 33 Patentee after: Southwest Institute of technology and engineering of China Ordnance Equipment Group Country or region after: China Address before: 400041 Yuzhou Road, Kowloon District, Chongqing, No. 33 Patentee before: NO 59 Research Institute OF CHINA ORDNACE INDUSTRY Country or region before: China |