CN203380207U - Rare-earth magnesium alloy pressing die - Google Patents
Rare-earth magnesium alloy pressing die Download PDFInfo
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- CN203380207U CN203380207U CN201320498768.7U CN201320498768U CN203380207U CN 203380207 U CN203380207 U CN 203380207U CN 201320498768 U CN201320498768 U CN 201320498768U CN 203380207 U CN203380207 U CN 203380207U
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- magnesium alloy
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Abstract
The utility model provides a rare-earth magnesium alloy pressing die. Equal channel angular pressing (ECAP) is realized by purely shearing and deforming a blank, and an initial aim is to introduce strong plastic deformation while the cross section area of a test sample is not changed. Currently, most of ECAP dies adopt two halves of dies so that the outer surfaces of products prepared by the dies are unsmooth and the products are easy to deform. The rare-earth magnesium alloy pressing die comprises a die base (1), wherein the die base is provided with a die outer sleeve (2), a die inner core (4) is mounted inside an inner core mounting hole (3) of the die outer sleeve, the inner core mounting hole is communicated with a discharging opening (5) of the die outer sleeve, the die inner core is provided with a die pressing head inner hole (6), and the die pressing head inner hole is internally provided with a die pressing head (7). The rare-earth magnesium alloy pressing die is used for manufacturing rare-earth magnesium alloy parts.
Description
technical field:
the utility model relates to a kind of magnesium-rare earth extrusion die.
background technology:
equal channel angular pressing texturing (equal channel angular pressing, ECAP) technology is subject to the attention of material supply section educational circles day by day as one of effective ways that obtain large scale sub-micron or nanoscale block materials by intense plastic strain.Equal-channel Angular Pressing (ECAP) makes blank realize by pure shear deformation, and it is risen in early 1980s by Segal and partner thereof, and initial purpose is to introduce intense plastic strain when not changing specimen cross sectional area.To the initial stage nineties, ECAP can obtain the intense plastic strain method of ultra-fine grain and obtains further development and application as a kind of.The equal channel angular extrusion die great majority that use at present are to adopt mold halves, plant thus the product external surfaces that mould makes rough, yielding, can't realize that multi-pass pushes repeatedly.In extrusion process, alloy easily enters in the gap of extrusion die, when the diameter of extruded bars easily changes, also easily causes the phenomenon of dead mould.And, adopt two semiformal moulds often to need to fix with bolt, because extrusion process is high temperature extrusion, set bolt must adopt high strength, high temperature resistant bolt, has increased the manufacturing cost of mould.Once the mould type phenomenon that rises occur, mould dismounting and inconvenient.
the utility model content:
the purpose of this utility model is to provide a kind of magnesium-rare earth extrusion die.
above-mentioned purpose realizes by following technical scheme:
a kind of magnesium-rare earth extrusion die, its composition comprises: mold base, on described mold base, die coat is installed, the inner core installing hole inside of described die coat is equipped with mold core, described inner core installing hole communicates with the discharging opening of described die coat, described mold core has mould pressure head endoporus, and described mould pressure head endoporus inside is equipped with the mould pressure head.
described magnesium-rare earth extrusion die, described inner core installing hole is L shaped through hole, and described inner core installing hole comprises horizontal channel, Vertical Channel, the crossing angle Φ of the angle of described horizontal channel, described Vertical Channel=90 °, external arc angle ψ is 37 °, external arc radiusr
be 0.5 mm, the diameter of passage is 14 mm.
described magnesium-rare earth extrusion die, have the bolt fixing hole on described mold base.
beneficial effect:
the utility model adopts the integral sleeve mould that fixedly mode of two halves core designs, and there are two cross sections and equate, the passage that intersects and connect fully at a certain angle, the interior angle of cut of two passages is Φ, extraneous arc angle is ψ.In Equal-channel Angular Pressing, closely cooperate and push downwards under the effect of the pressure P of drift with the lubricated good sample of mold wall with the channel size in mould, when the connection line through two passages, sample produces the detrusion of approximate ideal.Due to the shape of cross section that does not change material and area, therefore extruding can make the dependent variable accumulation superposition of each distortion and reach sizable overall strain amount repeatedly.
the utility model does not change the cross-sectional area of material, only need overcome the frictional force between sample and mould, therefore only need less operating pressure.Take magnesium alloy as example, and the bar that the extruding diameter is 8 ~ 14 mm only needs the pressure of 1 ~ 3 ton; Because the cross-sectional area of bar is constant, so can realize same sample is repeated to extruding to introduce higher plastic strain, realize directed, the homogeneous shear distortion repeatedly of material.Mould is used more convenient, as long as utilize test just can complete corresponding extruding production with testing machine for mechanical properties; Die coat and inner core adopt cuboid, facilitate the manufacturing of mould, and adopt heating tool to carry out preheating to mould; Inner core and overcoat adopt interference fits, have guaranteed the degree of packing that mould coordinates, and have also increased the parcel power of overcoat to inner core, improve the life-span of mould.
the utility model can be realized repeatedly pushing, and severe plastic deformation is all introduced in extruding at every turn, so Equal-channel Angular Pressing has the very great potential to micron, sub-micron and even nanoscale by the grain refinement of polycrystalline material.
the accompanying drawing explanation:
accompanying drawing 1 is structural representation of the present utility model.
accompanying drawing 2 is structural representations of die coat in accompanying drawing 1.
accompanying drawing 3 is A-A cutaway views of accompanying drawing 2.
accompanying drawing 4 is B-B cutaway views of accompanying drawing 2.
accompanying drawing 5 is C-C cutaway views of accompanying drawing 4.
accompanying drawing 6 is structural representations of mold core in accompanying drawing 1.
accompanying drawing 7 is top views of accompanying drawing 6.
accompanying drawing 8 is structural representations of mold base in accompanying drawing 1.
accompanying drawing 9 is top views of accompanying drawing 8.
accompanying drawing 10 is structural representations of mould pressure head in accompanying drawing 1.
the specific embodiment:
embodiment 1:
a kind of magnesium-rare earth extrusion die, its composition comprises: mold base 1, die coat 2 is installed on described mold base, inner core installing hole 3 inside of described die coat are equipped with mold core 4, described inner core installing hole communicates with the discharging opening 5 of described die coat, described mold core has mould pressure head endoporus 6, and described mould pressure head endoporus inside is equipped with mould pressure head 7.
embodiment 2:
according to the described magnesium-rare earth extrusion die of embodiment 1, described inner core installing hole is L shaped through hole, described inner core installing hole comprises horizontal channel, Vertical Channel, the crossing angle Φ of the angle of described horizontal channel, described Vertical Channel=90 °, external arc angle ψ is 37 °, external arc radiusr
be 0.5 mm, the diameter of passage is 14 mm.
embodiment 3:
according to the described magnesium-rare earth extrusion die of embodiment 1, there is bolt fixing hole 8 on described mold base.
embodiment 4:
above-mentioned magnesium-rare earth pressing method, while carrying out a time extruding, the painting of the bar of extruding is wiped to Hmp grease and with mould, be heated to extrusion temperature, while by the temperature of thermometer measure bar, being 250 ℃, start extruding, extrusion speed 2mm/s, the length of described bar is to be slightly less than the length of passage, start extruder, to push the drift painting and wipe Hmp grease, aim at die channel, remain a constant speed and pushed, treat that described bar passes through quarter bend fully, the bar Automatic-falling goes out mould, utilize specific purpose tool, to push drift takes out, carry out two passage extruding.
embodiment 5:
according to the described magnesium-rare earth pressing method of embodiment 4, the bar that a time is squeezed out, keep described bar from mould direction out, do not rotate any angle, put into mould, extrusion temperature 270-280 ℃, extrusion speed 2mm/s; Because diameter before and after extruding remains unchanged, described bar can be put into mould smoothly; Start extruder, will push the drift painting and wipe Hmp grease, aim at die channel, remain a constant speed and pushed; Treat that bar is fully by quarter bend, the bar Automatic-falling goes out mould; Utilize specific purpose tool, will push drift and take out.
embodiment 6:
according to the described magnesium-rare earth pressing method of embodiment 4, the bar that a time is squeezed out, keep described bar from mould direction out, 90-degree rotation, put into mould, extrusion temperature 270-280 ℃, extrusion speed 2mm/s; Because diameter before and after extruding remains unchanged, described bar can be put into mould smoothly; Start extruder, will push the drift painting and wipe Hmp grease, aim at die channel, remain a constant speed and pushed; Treat that bar is fully by quarter bend, the bar Automatic-falling goes out mould; Utilize specific purpose tool, will push drift and take out.
embodiment 7:
according to the described magnesium-rare earth pressing method of embodiment 4, the bar that a time is squeezed out, keep described bar from mould direction out, the Rotate 180 degree, put into mould, extrusion temperature 270-280 ℃, extrusion speed 2mm/s; Because diameter before and after extruding remains unchanged, described bar can be put into mould smoothly; Start extruder, will push the drift painting and wipe Hmp grease, aim at die channel, remain a constant speed and pushed; Treat that bar is fully by quarter bend, the bar Automatic-falling goes out mould; Utilize specific purpose tool, will push drift and take out.
embodiment 8:
above-mentioned magnesium-rare earth extrusion die
(1) die coat, shape as shown in the figure
material: H13, hot die steel 4Cr5MoSiV1
specification requirement: the blank forging moulding, annealing, quenching+tempering, obtain martensite and add the carbide tissue
HRC46-50
inner surface fineness reaches R0.4
(2) mold core, shape as shown in the figure
material: H13, hot die steel 4Cr5MoSiV1
specification requirement: the blank forging moulding, annealing, quenching+tempering, obtain martensite and add the carbide tissue
HRC48-52
surfaces externally and internally fineness reaches R0.4
(3) mold base, shape as shown in the figure
material: 45
specification requirement: quenching+tempering obtains martensite and adds the carbide tissue
HRC48-52
(4) mould pallet, shape is as figure
material: 45
specification requirement: quenching+tempering obtains martensite and adds the carbide tissue
HRC48-52
(5) mould pressure head, shape is as figure
material: 45
specification requirement: the blank extrusion molding, annealing, quenching+tempering, obtain martensite and add the carbide tissue
HRC48-52
outer surface fineness reaches R0.4
Claims (3)
1. a magnesium-rare earth extrusion die, its composition comprises: mold base, it is characterized in that: on described mold base, die coat is installed, the inner core installing hole inside of described die coat is equipped with mold core, described inner core installing hole communicates with the discharging opening of described die coat, described mold core has mould pressure head endoporus, and described mould pressure head endoporus inside is equipped with the mould pressure head.
2. magnesium-rare earth extrusion die according to claim 1, it is characterized in that: described inner core installing hole is L shaped through hole, described inner core installing hole comprises horizontal channel, Vertical Channel, the crossing angle Φ of the angle of described horizontal channel, described Vertical Channel=90 °, external arc angle ψ is 37 °, external arc radius R is 0.5 mm, and the diameter of passage is 14 mm.
3. magnesium-rare earth extrusion die according to claim 1 and 2, is characterized in that: have the bolt fixing hole on described mold base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498768.7U CN203380207U (en) | 2013-08-15 | 2013-08-15 | Rare-earth magnesium alloy pressing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498768.7U CN203380207U (en) | 2013-08-15 | 2013-08-15 | Rare-earth magnesium alloy pressing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203380207U true CN203380207U (en) | 2014-01-08 |
Family
ID=49868736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320498768.7U Expired - Fee Related CN203380207U (en) | 2013-08-15 | 2013-08-15 | Rare-earth magnesium alloy pressing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203380207U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394542A (en) * | 2013-08-15 | 2013-11-20 | 黑龙江科技大学 | Rare earth magnesium alloy extrusion die and extrusion method |
| CN104550296A (en) * | 2014-11-20 | 2015-04-29 | 天津理工大学 | Magnesium alloy material equal channel angular cold extrusion molding device |
-
2013
- 2013-08-15 CN CN201320498768.7U patent/CN203380207U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394542A (en) * | 2013-08-15 | 2013-11-20 | 黑龙江科技大学 | Rare earth magnesium alloy extrusion die and extrusion method |
| CN104550296A (en) * | 2014-11-20 | 2015-04-29 | 天津理工大学 | Magnesium alloy material equal channel angular cold extrusion molding device |
| CN104550296B (en) * | 2014-11-20 | 2016-08-17 | 天津理工大学 | The equal channel angular cold-extrusion shaping device of magnesium alloy materials |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20150815 |
|
| EXPY | Termination of patent right or utility model |