CN101693264A - Large equal channel angular large-strain extrusion die - Google Patents
Large equal channel angular large-strain extrusion die Download PDFInfo
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- CN101693264A CN101693264A CN200910036092A CN200910036092A CN101693264A CN 101693264 A CN101693264 A CN 101693264A CN 200910036092 A CN200910036092 A CN 200910036092A CN 200910036092 A CN200910036092 A CN 200910036092A CN 101693264 A CN101693264 A CN 101693264A
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Abstract
The invention relates to a large equal channel angular large-strain extrusion die comprising an upper die holder (7), a die case (2), a punch (10) and a lower die holder (4). The large equal channel angular large-strain extrusion die is characterized in that the upper end of the punch (10) is fixedly mounted in a punch fixing board (12); the upper die holder (7), a punch backing plate (6) and the punch fixing board (12) are tightly connected to form a whole body; a front die core (15) and a rear die core (18) are embedded in the die case (2); the lower end of the punch (10) is inserted in an extrusion cavity (19) formed between the front die core (15) and the rear die core (18); the die case (2) is provided with a slantwise arranged extrusion channel (20) which is communicated with the extrusion cavity (19) and embedded in the lower die holder (4); the front die core (15), the rear die core (18) and the die case (2) are in taper fit; the lower die holder (4) is connected with the die case (2); and a discharge cavity (21) which is communicated with the extrusion channel (20) on the die case (2) is arranged on the lower die holder (4). The invention has the advantages of high strength, smooth extrusion and simple structure.
Description
Technical field
The present invention relates to a kind of metal material modification processing mold, especially a kind of major diameter passage extrusion die that passage crimp such as utilizes to change materials microstructure, the continuously extruded large equal channel angular large-strain extrusion die of specifically a kind of extrusion type.
Background technology
As everyone knows, since the mid-90 in 20th century, equal channel angular extruding (Equal ChannelAngular Pressing is called for short ECAP) technology is subjected to the great attention of global material circle, has now developed into an important method of preparation high-performance metal materials.The ECAP technology to the processing of material have that shearing force is big, shear strain big, can efficient refinement material structure and the characteristics of field trash, elimination hole defect, and many performances such as the material that processes has that geometry is constant substantially, intensity is high, plasticity good, forming property is good, fatigue behaviour is good, corrosion resistance is good, ultra precision cutting and anodized surface quality height.
But up to now, its size of the material that the ECAP technology processes all very little (cross sectional dimensions: be no more than 20mm * 20mm (cuboid) or Φ 20mm (cylinder)) has seriously hindered the ECAP Industrial Application of Technology.The ECAP technology is in the process of rapidoprint, and preceding road workpiece needs the pushing of road, back workpiece could depanning, promptly could realize serialization, quantize to produce.Because preceding road workpiece is to the opposition of the back road workpiece plastic flow stress greater than rapidoprint, therefore road, back workpiece had taken place to forge thick before the generation extruding is descending, die surface has been produced very big pressure, cause that lubrication failure, frictional force sharply raise, extrusion load sharply increases, make that extrusion process is difficult to carry out, for soft, easily material such as 3003Al, the 6063Al etc. of plastic deformation to take place particularly like this.For small-sized ECAP, extrusion load can be ignored to the tonnage demand of extrusion equipment with to the obdurability requirement of mould etc., but for large-scale ECAP, this requires to have become the critical bottleneck that limits its commercial application.
Therefore, will be in the industrial ECAP technology of applying, must handle large mold obdurability, workpiece large strain deformation quality (strain size, strain uniformity etc.), workpiece well and quantize the contradiction between the big strain processing continuously, this be except will carrying out the Strengthening and Toughening design mold integral, also must carry out selection and optimization to the structural parameters of the working chamber (core rod die cavity) of mould.Up to the present, the mould that does not have a kind of large-scale, continuous equal channel angular pressing texturing that uses for actual industrial production to prepare high-performance metal materials as yet is available.
Summary of the invention
The objective of the invention is to lack large mold and be difficult to realize that suitability for industrialized production reaches the problem that can not realize serialization production to low-durometer material at existing Equal Channel Angular Extrusion Processing, design the large equal channel angular large extrusion process mould that a kind of energy continuous batch carries out Equal Channel Angular Extrusion Processing, provide essential equipment for realizing the microstructure and property that suitability for industrialized production utilizes Equal Channel Angular Extrusion Processing significantly to improve metal material.
Technical scheme of the present invention is:
A kind of large equal channel angular large-strain extrusion die, comprise upper bolster 7, convex mould pad 6, punch retainer 12, die case 2, punch 10, preceding core rod 15, back core rod 18 and die shoe 4, it is characterized in that upper bolster 7 is fixed on the upper table that loads machinery, the upper end of punch 10 is fixedly installed in the punch retainer 12, links to each other with the upper table that loads machinery with hexagon socket cap head screw 5 fastening whole backs of formation that link to each other with pin 8 location between upper bolster 7, convex mould pad 6, the punch retainer 12; Be embedded in the die case 2 behind preceding core rod 15 and back core rod 18 usefulness pins 13 and 16 location, in the extrusion chamber 19 that forms between core rod 15 and the back core rod 18 before the lower end of punch 10 is inserted into, die case 2 is provided with the tilting passage 20 of extruding that communicates with described extrusion chamber 19, die case 2 is embedded in the die shoe 4, preceding core rod 15, be taper fit between back core rod 18 and the die case 2, die shoe 4 link to each other with die case 2 (fastening) with pin 1 location and hexagon socket cap head screw 17, die shoe 4 is installed on the lower table that loads machinery (as hydraulic press), be provided with on the die shoe 4 with die case 2 on extrude the discharging chamber 21 that passage 20 communicates.
The extrusion chamber 19 that forms between core rod 15 and the back core rod 18 before described is made up of two crossing passages such as cylindrical, the described cylindrical diameter that waits passage is that the interior angle φ of passage axis such as 20-90mm, two be cylindrical is 100～120 degree, and two cylindrical equal channel angular changeover portion exterior angle ψ are 24～30 degree.
Mould of the present invention can be implemented the big strain extrusion process of the continuous equal channel angular of extrusion type and with below its field trash AlFeMnSi fragmentation to 3 micron to soft metal 3003Al and 6063Al.
The cone angle of the cooperation tapering before described between core rod 15, back core rod 18 and the die case 2 is 4～8 degree.
Be linked to be a dismountable overall structure by pin 8 location and by hexagon socket cap head screw 5 is fastening between described upper bolster 7, convex mould pad 6, the punch retainer 12.
Described die holder 4 and die case 2 are fastening by pin 1 location and hexagon socket cap head screw 17.
Beneficial effect of the present invention:
(1) but the present invention for the Equal Channel Angular Extrusion Processing method provides a kind of large mold of suitability for industrialized production, solved theoretical and an actual difficult problem that combines.
(2) the present invention is by the optimal design of mould structure, especially by control to interior angle and exterior angle angle, solve large mold obdurability, workpiece large strain deformation quality (strain size, strain uniformity etc.), workpiece well and quantized the contradiction between the big strain processing continuously, make and to extrude smooth fluently, guaranteed to connect the carrying out of extruding.
(3) the present invention can implement below the big strain extrusion process of equal channel angular and its field trash to 3 of fragmentation micron the soft metal materials such as 3003Al, 6063Al of diameter 20～90mm.
(4) all parts of mould of the present invention are all detachable, and the mould maintenance is convenient.
Description of drawings
Fig. 1 is a mould structure schematic diagram of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is as cast condition 3003Al through mould extruding of the present invention back field trash by fragmentation extremely less than the metallograph of 3 μ m.
Fig. 4 is as cast condition 6063Al through mould extruding of the present invention back field trash by fragmentation extremely less than the metallograph of 3 μ m.
Fig. 5 is the product photo figure in kind that utilizes after mould of the present invention pushes.
Among the figure: 1,8,13,16 is alignment pin; 2 is die case; 3,9,11,14 are the lifting screw hole; 4 is die shoe; 5,17 is socket head screw; 6 is convex mould pad; 7 is upper bolster; 10 is punch; 12 is punch retainer; 15 is preceding core rod; 18 is the back core rod; 19 is extrusion chamber; 20 for extruding passage; 21 are the discharging chamber.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, 2.
A kind of large equal channel angular large-strain extrusion die, comprise upper bolster 7, convex mould pad 6, punch retainer 12, die case 2, punch 10, preceding core rod 15, back core rod 18 (see figure 2)s and die shoe 4, upper bolster 7 is fixed on the upper table that loads machinery (as hydraulic press), the upper end of punch 10 is fixedly installed in the punch retainer 12, links to each other with the upper table that loads machinery with hexagon socket cap head screw 5 fastening whole backs of formation that link to each other with pin 8 location between upper bolster 7, convex mould pad 6, the punch retainer 12; Be embedded in the die case 2 behind preceding core rod 15 and back core rod 18 usefulness pins 13 and 16 location, in the extrusion chamber 19 that forms between core rod 15 and the back core rod 18 before the lower end of punch 10 is inserted into, this extrusion chamber 19 is made up of two crossing cylindrical passages that wait, the described cylindrical diameter that waits passage is that the interior angle φ of passage axis such as 20-90mm, two be cylindrical is 100～120 degree, and two cylindrical equal channel angular changeover portion exterior angle ψ are 24～30 degree.Die case 2 is provided with the tilting passage 20 of extruding that communicates with described extrusion chamber 19, die case 2 is embedded in the die shoe 4, between preceding core rod 15, back core rod 18 and the die case 2 is taper fit, the cone angle that cooperates can be 4～8 degree, die shoe 4 links to each other with die case 2, can be fastening during concrete enforcement with pin 1 location and hexagon socket cap head screw 17, die shoe 4 is installed on the lower table that loads machinery (as hydraulic press), be provided with on the die shoe 4 with die case 2 on extrude the discharging chamber 21 that passage 20 communicates, as shown in Figure 1.
The installation process of mould of the present invention is: die case 2 is embedded in the die shoe 4, positions with fastening with pin 1 and socket head screw 17; With front and back core rod 15,18) with putting into die case 2 behind pin 13,16 location; Punch 10 is installed in the punch retainer 12; Upper bolster 7, convex mould pad 6, punch retainer 12 usefulness pins, 8 location and hexagon socket cap head screw 5 is fastening; After the punch part and punch part matched moulds with the above mould that assembles, be installed on the loading machinery (as hydraulic press).
The big strain extruding course of work is: workpiece is put into vertical channel, and workpiece is under the pressure effect that loads machinery (hydraulic press), through the crossing corner generation large strain deformation in the core rod; When the workpiece upper end goes downwards to the core rod corner, stop to load, oppositely start the mechanical up punch of loading, put into subsequent workpiece to vertical channel, load once more, utilize subsequent workpiece that previous workpiece is pushed out mould; And so forth, realize waiting continuously the big strain extrusion process of passage.
Below be to carry out waiting continuously the example of the big strain extrusion process of passage according to method of the present invention, but be not limited only to these examples,,, all can reach purpose of the present invention as long as adopt the method for the invention for the blank of heterogeneity.
Mould of the present invention can be widely used in that soft metals such as 3003Al, 6063Al are implemented the big strain extrusion process of the continuous equal channel angular of extrusion type and with below its field trash (AlFeMnSi) fragmentation to 3 micron.It below is the instantiation that utilizes Mould Machining of the present invention.
Example 1: the channel diameter of equal channel angular extrusion die is that 90mm, mould interior angle φ are that 120 degree, ψ angle, mould exterior angle are 30 degree.Can carry out waiting continuously the big strain extrusion process of passage by very smooth as cast condition 3003Al and 6063Al to diameter 90mm, fragmentation field trash (AlFeMnSi) is to less than 3 μ m, and it is scatter (seeing Fig. 3,4).
Example 2: the channel diameter of equal channel angular extrusion die is that 20mm, mould interior angle φ are that 110 degree, mould exterior angle ψ are 25 degree.Can be very successfully as cast condition 3003Al and the 6063Al of diameter 20mm be carried out waiting continuously the big strain extrusion process of passage, the hardness of 6063Al is brought up to 94.2Hv from 58.8Hv.
Example 3: the channel diameter of equal channel angular extrusion die is that 20mm, mould interior angle φ are that 100 degree, mould exterior angle ψ are 24 degree.Can be very successfully as cast condition 3003Al and the 6063Al of diameter 20mm be carried out waiting continuously the big strain extrusion process of passage, the hardness of 6063Al is brought up to 96Hv from 58.8Hv.
Example 4: the channel diameter of equal channel angular extrusion die is that 20mm, mould interior angle φ are that 100 degree, mould exterior angle ψ are 70 degree.Though can be very wellly to passage extrusion processes such as the as cast condition 3003Al of diameter 20mm and 6063Al connect, dependent variable is less and inhomogeneous, using value is little.
Example 5: the channel diameter of equal channel angular extrusion die is that 20mm, mould exterior angle ψ are that 90 degree, mould interior angle φ are 90 degree.After first as cast condition 3003Al blank terminal enters the mould turning, put into second blank, second blank can not be pushed first blank out, and the equal channel angular extruding can not be carried out continuously.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (6)
1. large equal channel angular large-strain extrusion die, comprise upper bolster (7), convex mould pad (6), punch retainer (12), die case (2), punch (10), preceding core rod (15), back core rod (18) and die shoe (4), the upper end that it is characterized in that punch (10) is fixedly installed in the punch retainer (12), the fastening integral body of formation that links to each other of upper bolster (7), convex mould pad (6) and punch retainer (12); Preceding core rod (15) and back core rod (18) are embedded in the die case (2), the lower end of punch (10) is inserted in the extrusion chamber (19) that forms between preceding core rod (15) and the back core rod (18), die case (2) is provided with the tilting passage (20) of extruding that communicates with described extrusion chamber (19), die case (2) is embedded in the die shoe (4), preceding core rod (15), between back core rod (18) and the die case (2) is taper fit, die shoe (4) links to each other with die case (2), be provided with on the die shoe (4) with die case (2) on extrude the discharging chamber (21) that passage (20) communicates.
2. mould according to claim 1, it is characterized in that described before the extrusion chamber (19) of formation between core rod (15) and back core rod (18) form by two crossing passages such as cylindrical, the described cylindrical diameter that waits passage is that the interior angle φ of passage axis such as 20-90mm, two be cylindrical is 100～120 degree, and two cylindrical equal channel angular changeover portion exterior angle ψ are 24～30 degree.
3. mould according to claim 1 is characterized in that it can implement the big strain extrusion process of the continuous equal channel angular of extrusion type and with below its field trash AlFeMnSi fragmentation to 3 micron to soft metal 3003Al and 6063Al.
4. mould according to claim 1, the cone angle that it is characterized in that the cooperation tapering between described preceding core rod (15), back core rod (18) and the die case (2) is 4～8 degree.
5. mould according to claim 1 is characterized in that between described upper bolster (7), convex mould pad (6), the punch retainer (12) being linked to be a dismountable overall structure by pin (8) location and by hexagon socket cap head screw (5) is fastening.
6. mould according to claim 1 is characterized in that described die holder (4) and die case (2) are fastening by pin (1) location and hexagon socket cap head screw (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100360928A CN101693264B (en) | 2009-10-16 | 2009-10-16 | Large equal channel angular large-strain extrusion die |
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| CN2009100360928A CN101693264B (en) | 2009-10-16 | 2009-10-16 | Large equal channel angular large-strain extrusion die |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856678A (en) * | 2010-06-29 | 2010-10-13 | 中南大学 | Device capable of realizing accurate control of equal-channel angular extrusion processing route |
| CN102513395A (en) * | 2011-12-14 | 2012-06-27 | 合肥工业大学 | Equal channel angular extruding, twisting and deforming mold for large plastic forming process |
| CN102623166A (en) * | 2012-04-17 | 2012-08-01 | 江苏大学 | Preparation method for high performance as cast condition neodymium iron boron magnet |
| CN103611752A (en) * | 2013-11-27 | 2014-03-05 | 山东建筑大学 | Novel method and device for preparing bulk nanometer aluminum-lithium alloy |
| CN104874631A (en) * | 2015-06-02 | 2015-09-02 | 太原理工大学 | U-shape bend-pressing die and method |
| CN105057372A (en) * | 2015-08-26 | 2015-11-18 | 山东建筑大学 | Method for preparing high-strength cycloidal gear for industrial robots |
| CN105127221A (en) * | 2015-08-25 | 2015-12-09 | 山东建筑大学 | New preparing method of high-strength nanocrystalline aluminum pipe |
| CN107309290A (en) * | 2017-07-28 | 2017-11-03 | 江苏大学 | The big strain mould of integrated extruding and equal channel angular detrusion |
| CN108372210A (en) * | 2016-12-20 | 2018-08-07 | 中国航空制造技术研究院 | A kind of equal-channel extrusion device and method |
| CN112453090A (en) * | 2020-11-04 | 2021-03-09 | 山东大学 | Real-time online heating constant-temperature equal-channel angular extrusion device and method |
| CN114713652A (en) * | 2021-12-22 | 2022-07-08 | 河南理工大学 | Device and method for continuous equal channel angular extrusion of metal and alloy materials |
Family Cites Families (7)
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| US5904062A (en) * | 1998-05-11 | 1999-05-18 | The United States Of America As Represented By The Secretary Of The Air Force | Equal channel angular extrusion of difficult-to-work alloys |
| CN1139443C (en) * | 2000-12-08 | 2004-02-25 | 天津理工学院 | Rotary extruder with equal channel angles |
| CN2690068Y (en) * | 2003-06-21 | 2005-04-06 | 大连理工大学 | Device for preparing super fine grain crystal pipe by equal passage corner extrusion |
| US7191630B2 (en) * | 2003-07-25 | 2007-03-20 | Engineered Performance Materials Co., Llc | Method and apparatus for equal channel angular extrusion of flat billets |
| US7296453B1 (en) * | 2005-11-22 | 2007-11-20 | General Electric Company | Method of forming a structural component having a nano sized/sub-micron homogeneous grain structure |
| CN101134211B (en) * | 2006-08-28 | 2010-05-12 | 太原理工大学 | L-shaped extrusion device for producing ultra-fine crystal block body material |
| RU2352419C1 (en) * | 2007-07-17 | 2009-04-20 | Российская Федерация, от имени которой выступает государственный заказчик- Федеральное агентство по атомной энергии | Punch for equally-channel angular pressing |
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2009
- 2009-10-16 CN CN2009100360928A patent/CN101693264B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856678A (en) * | 2010-06-29 | 2010-10-13 | 中南大学 | Device capable of realizing accurate control of equal-channel angular extrusion processing route |
| CN102513395A (en) * | 2011-12-14 | 2012-06-27 | 合肥工业大学 | Equal channel angular extruding, twisting and deforming mold for large plastic forming process |
| CN102623166A (en) * | 2012-04-17 | 2012-08-01 | 江苏大学 | Preparation method for high performance as cast condition neodymium iron boron magnet |
| CN103611752A (en) * | 2013-11-27 | 2014-03-05 | 山东建筑大学 | Novel method and device for preparing bulk nanometer aluminum-lithium alloy |
| CN104874631A (en) * | 2015-06-02 | 2015-09-02 | 太原理工大学 | U-shape bend-pressing die and method |
| CN105127221A (en) * | 2015-08-25 | 2015-12-09 | 山东建筑大学 | New preparing method of high-strength nanocrystalline aluminum pipe |
| CN105057372A (en) * | 2015-08-26 | 2015-11-18 | 山东建筑大学 | Method for preparing high-strength cycloidal gear for industrial robots |
| CN108372210A (en) * | 2016-12-20 | 2018-08-07 | 中国航空制造技术研究院 | A kind of equal-channel extrusion device and method |
| CN107309290A (en) * | 2017-07-28 | 2017-11-03 | 江苏大学 | The big strain mould of integrated extruding and equal channel angular detrusion |
| CN112453090A (en) * | 2020-11-04 | 2021-03-09 | 山东大学 | Real-time online heating constant-temperature equal-channel angular extrusion device and method |
| CN114713652A (en) * | 2021-12-22 | 2022-07-08 | 河南理工大学 | Device and method for continuous equal channel angular extrusion of metal and alloy materials |
| CN114713652B (en) * | 2021-12-22 | 2023-08-15 | 河南理工大学 | Device and method for continuous equal-diameter angular extrusion of metal and alloy materials |
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| CN101693264B (en) | 2011-02-16 |
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