CN206104576U - Rotatory parallel extrusion die in passageway constant diameter angle - Google Patents
Rotatory parallel extrusion die in passageway constant diameter angle Download PDFInfo
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- CN206104576U CN206104576U CN201621085616.4U CN201621085616U CN206104576U CN 206104576 U CN206104576 U CN 206104576U CN 201621085616 U CN201621085616 U CN 201621085616U CN 206104576 U CN206104576 U CN 206104576U
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- die
- rotating channel
- isometrical
- parallel extrusion
- angle
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Abstract
The utility model relates to a rotatory parallel extrusion die in passageway constant diameter angle, including die and mould base, the die is fixed on the mould base, has seted up the feed inlet at the top of die, and one side of die is equipped with the discharge gate, the die be the setting of wedge shape, the width is grow gradually from top to bottom, its focus is located the lower part of die, the die comprises front mould and back mould, and front mould die cavity and the back corresponding setting in model chamber, wherein, front mould die cavity and back model intracavity form extrusion channel, the utility model discloses the rotation that can make metal bulk material shear orientation and shearing angle at the in -process of once feeding realizes bc processing route for grain refinement becomes evenly, and experience pure shear large deformation many times in the upper and lower constant diameter angle extrusion channel of parallel, thereby realizes obtaining even and big plastic deformation volume in single -pass's the extrusion process of feeding, and then makes the metal bulk material who has the ultra -fine grain structure.
Description
Technical field
This utility model is related to a kind of isometrical angle parallel extrusion mould of rotating channel, belongs to metal working equipment technology
Field.
Background technology
With modern material the reach of science, the metal material with excellent comprehensive mechanical property is even more and causes huge pass
Note.Crystal grain is more tiny, and the intensity and toughness of material can all be improved, and comprehensive mechanical property is improved.Super fine crystal material is a kind of average
Grained material of the crystallite dimension less than lum, including sub-micron crystal material and nanocrystalline material.Due to the crystal grain pole of super fine crystal material
Carefully, compared with general material, defect concentration is higher, and shared by crystal boundary, volume ratio is also higher, thus possesses a series of excellent
The combination property of different mechanics, physics and optics aspect.
Large plastometric set method has become and prepares one of most promising method of bulk ultrafine-grained materials.At present, more often
The large plastometric set technique seen mainly includes：Multiway forging technique, Processed by Accumulative Roll-bonding, Equal Channel Angular Pressing are squeezed and are turned round, high pressure torsion
Deng.In this several large plastometric set technique, equal channel angular pressing platen press (ECAP) is continuously to prepare large scale ultrafine grain metal knot
One of structure material most efficient method, with good industrial applications prospect.
ECAP process routes are by two axes intersect and the equal passage of sectional dimension, material is protected afterwards before processing
Stablizing for machine direction size is held, then material can be processed the big dependent variable of accumulation with identical sectional area repeatedly.In quilt
During rapidoprint is extruded, because the corner effect of passage, there is detrusion in material in process, produce big
Shear strain, thus causes the rearrangement of dislocation and is refined crystal grain.To obtain big plastic strain, sample need to be carried out many
Passage is extruded, and according to the difference of sample direction of rotation and angle between extruding twice, is following several technique roads ECAP point
Footpath：A：Do not rotate after extruding every time, be directly entered lower a time；BA：It is rotated by 90 ° after extruding every time, direction of rotation alternate；
BC：It is rotated by 90 ° after extruding every time, but direction of rotation is constant；C：After extruding every time sample rotate 180 ° it is straight enter lower a time.
The plastic strain of conventional Equal Channel Angular Pressing (ECAP) technique single pass extruding is 1 or so.To accumulate sufficiently large modeling
Property strain (>4), it is common practice to carry out repeatedly multi-pass extruding.Multi-pass extruding repeatedly brings repeatedly charging, repeated loading
And the time-consuming problem such as sample machining.Time-consuming problem is showed particularly in not damaged prepares age-hardening type aluminium alloy technique
It is prominent.
Utility model content
This utility model provides a kind of rotating channel isometrical angle parallel extrusion mould, can make bulk metal material once
The rotation of shear direction and shearing inclination is carried out in charging process, Bc machining paths are realized so that crystal grain refinement becomes uniform, and
Multiple pure shear large deformation is experienced in the parallel pressure passageway of equal channel angular pressing up and down, so as to realize that the charging in single pass was extruded
Uniform and big amount of plastic deformation is obtained in journey, and then the bulk metal material with ultra-fine grain structure is obtained.
This utility model solves the technical scheme adopted by its technical problem：
A kind of isometrical angle parallel extrusion mould of rotating channel, including die and mold base, die are fixed on mold base
On, charging aperture is offered at the top of die, the side of die is provided with discharging opening, and the wedge shaped shape of described die is arranged, wide
Degree from top to bottom becomes larger, and its center of gravity is located at the bottom of die, and die is made up of front mould and rear mold, and front model cavity and rear mold
The corresponding setting of die cavity, wherein, squeezing passage is formed in front model cavity and rear model cavity, the squeezing passage includes that isometrical angle is put down
Row squeezing passage, under isometrical angle parallel extrusion passage and rotating channel, the two ends of rotating channel are parallel with upper isometrical angle respectively to be squeezed
Pressure passageway, under isometrical angle parallel extrusion passage be connected, upper isometrical angle parallel extrusion passage is connected with charging aperture and both are vertical
Arrange, under isometrical angle parallel extrusion passage connect with discharging opening, and under isometrical angle parallel extrusion passage it is parallel with upper isometrical angle crowded
Pressure passageway is arranged in 90 °；
As it is of the present utility model further preferably, described rotating channel includes that the first rotating channel and the second rotation are logical
Road, both are sequentially connected with, wherein, the first rotating channel is arranged in 90 ° of angles with upper isometrical angle parallel extrusion passage, the first rotation
Passage isometrical angle parallel extrusion passage with is parallel；Second rotating channel is be arranged in parallel with upper isometrical angle parallel extrusion passage, the
Two rotating channels isometrical angle parallel extrusion passage with is arranged in 90 ° of angles；Wherein, the first rotating channel, the second rotating channel
Inner section is by each in circular cross-section, elliptic cross-section, circular cross-section gradual change, and the first rotating channel, the second rotating channel
Area of section remains constant；
As it is of the present utility model further preferably, the isometrical angle parallel extrusion mould of described rotating channel also includes being located at
Drift directly over die, which passes through drift fixing device and drift is fastened on external pressure compressing head, by external pressure machine
In imposed load press-in die；Described drift fixing device includes that short T-slot bolt, big nut, big pad and drift are solid
Determine block, drift fixed block is placed in above die, be fixed by short T-slot bolt, big nut, big pad；
Further preferably the die is fixed on mold base by die fixing device as of the present utility model,
Described die fixing device includes two die fixed blocks, long T-slot bolt, big nut and big pad, die fixed block
Band incline inner groovy, be fixed on mold base by long T-slot bolt, big nut and big pad, its angle of inclination with it is recessed
Die wedge shape inclination angle is consistent, is separately fixed at die both sides, and the inclination inner groovy of die fixed block is fitted with die fixation；
As it is of the present utility model further preferably, die is manufactured using Cr12MoV steel；The interior angle Φ of rotating channel
For 90 °, exterior angle Ψ is 20 °, and lift angle is 80 °, and the oval factor is 1.35；
As it is of the present utility model further preferably, the first rotating channel, the second rotating channel inner section by circular cross-section,
Elliptic cross-section, circular cross-section gradual change, the angle changing of wherein elliptic cross-section are followed successively by 67.5 °, 45 °, 22.5 °.
By above technical scheme, relative to prior art, this utility model has the advantages that：
One is that this utility model can be realized once loading and complete Bc processing routes；Propose to round bar using circular-ellipse
The method of circular-circular variable cross-section shape is realized every changing shear direction of the sample in three passage Equal Channel Angular Pressings
It is rotated by 90 ° after secondary extruding, but the constant Bc extrusion process routes in direction of rotation；Put down to oval change of shape by circular in addition
Slow, sectional area keeps constant, and without wedge angle transition, the stress concentration degree of round bar is low, it is ensured that round bar is suitable in mould
Sharp Plastic Flow, while avoiding the mould and the mutual friction force of blank brought by section acute variation, extends mould
Life-span.
Two be this utility model can shortened process, improve forming quality；Isometrical angle parallel extrusion technique is played
Technical advantage with extruding process is turned round, introduces rotating channel in the middle of the isometrical angle parallel extrusion passage of three passages, and the rotating channel changes
The angle of round bar advance has been become while shear deformation zone is increased to the torsional deflection that round bar brings；Present invention reduces
Technological process, has saved process time, makes material entirety large plastometric set grain structure uniform, improves preparation rate.
Three is that Design of Dies of the present utility model is reasonable, wedge structure is convenient for assembly and changes, simple and reliable for structure, can be made
Before and after deformation, the cross dimension shape of round bar keeps constant, and low cost of manufacture, is widely used in alloy material processing neck
Domain.
Description of the drawings
With reference to the accompanying drawings and examples this utility model is further illustrated.
Fig. 1 is the overall structure diagram of preferred embodiment of the present utility model；
Fig. 2 is the rotating channel inner section of preferred embodiment of the present utility model by circular cross-section, elliptic cross-section, circle
Five sectional views of equidistant A, B, C, D, E that section gradual change is formed；
Fig. 3 is the structural representation of the female die of die die cavity of preferred embodiment of the present utility model；
In figure：1 is short T-slot bolt, and 2 is drift fixed block, and 3 is drift, and 4 is big nut, and 5 is long T-slot spiral shell
Bolt, 6 is big pad, and 7 is die fixed block, and 8 is rear mold, and 9 is bolt, and 10 is primary nut, and 11 is minipad, and 12 is front mould, 13
For squeezing passage, 14 is mold base.
Specific embodiment
This utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Basic structure of the present utility model is only illustrated in a schematic way, therefore which only shows the composition relevant with this utility model.
To simplify the preparation flow of Equal Channel Angular Pressing (ECAP) technique, preparation time is reduced, propose the isometrical angle of rotating channel
Parallel extrusion (Rotated Equal Channel Angular Pressing-Parallel Channel, Rotated
ECAP-PC) large plastometric set mould.The mould arranges multiple detrusion areas in a passage, by two isometrical angles
Arrange rotating channel to change round bar shear direction and shearing inclination between squeezing passage section, realize Bc machining paths, simplify
Equal Channel Angular Pressing preparation technology, improves deformation uniformity, while solving round bar can not change shearing side in deformation passage
To problem.Extruding passage is not only increased on the basis of equal channel angular pressing technology, and is changed in extrusion process and is cut
Butt to, solve Equal Channel Angular Pressing low production efficiency, time-consuming problem, the material grains for so obtaining are thinner, and crystal grain
It is more evenly distributed.
As shown in figure 1, a kind of isometrical angle parallel extrusion mould of rotating channel of the present utility model, including die and mould bottom
Seat, die are fixed on mold base, and charging aperture is offered at the top of die, and the side of die is provided with discharging opening, described
The wedge shaped shape of die is arranged, and width from top to bottom becomes larger, and its center of gravity is located at the bottom of die, and die is by front mould and rear mold
Constitute, and the setting corresponding with rear model cavity of front model cavity, wherein, squeezing passage is formed in front model cavity and rear model cavity, should
Squeezing passage include isometrical angle parallel extrusion passage, under isometrical angle parallel extrusion passage and rotating channel, the two of rotating channel
End respectively with upper isometrical angle parallel extrusion passage, under isometrical angle parallel extrusion passage be connected, upper isometrical angle parallel extrusion passage
Connect with charging aperture and both be vertically arranged, under isometrical angle parallel extrusion passage connect with discharging opening, and under isometrical angle it is parallel crowded
Pressure passageway is arranged in 90 ° with upper isometrical angle parallel extrusion passage；
Shown in Fig. 2, as it is of the present utility model further preferably, described rotating channel includes the first rotating channel and the
Two rotating channels, both are sequentially connected with, wherein, the first rotating channel is arranged in 90 ° of angles with upper isometrical angle parallel extrusion passage,
First rotating channel isometrical angle parallel extrusion passage with is parallel；Second rotating channel is parallel with upper isometrical angle parallel extrusion passage
Arrange, the second rotating channel isometrical angle parallel extrusion passage with is arranged in 90 ° of angles；Wherein, the first rotating channel, the second rotation
Turn passage inner section to be led to by circular cross-section, elliptic cross-section, circular cross-section gradual change, and the first rotating channel, the second rotation
In road, each area of section remains constant；Bar starts gradual transition to oval cross section with circular cross-section, and while rotation cuts
Face position, in rotating channel end again by oval cross section gradual transition to circular cross-section, is finally terminated with circular cross-section.
As it is of the present utility model further preferably, the isometrical angle parallel extrusion mould of described rotating channel also includes being located at
Drift directly over die, which passes through drift fixing device and drift is fastened on external pressure compressing head, by external pressure machine
In imposed load press-in die；Described drift fixing device includes that short T-slot bolt, big nut, big pad and drift are solid
Determine block, drift fixed block is placed in above die, be fixed by short T-slot bolt, big nut, big pad；Mold base
It is fixedly connected with the work top of external pressure machine bottom；
Further preferably the die is fixed on mold base by die fixing device as of the present utility model,
Described die fixing device includes two die fixed blocks, long T-slot bolt, big nut and big pad, die fixed block
Band incline inner groovy, be fixed on mold base by long T-slot bolt, big nut and big pad, its angle of inclination with it is recessed
Die wedge shape inclination angle always, is separately fixed at die both sides, and the inclination inner groovy of die fixed block is fitted with die fixation；
As it is of the present utility model further preferably, die is manufactured using Cr12MoV steel；The interior angle Φ of rotating channel
For 90 °, exterior angle Ψ is 20 °, and lift angle is 80 °, and the oval factor is 1.35；
As it is of the present utility model further preferably, the first rotating channel, the second rotating channel inner section by circular cross-section,
Elliptic cross-section, circular cross-section gradual change, the angle changing of wherein elliptic cross-section are followed successively by 67.5 °, 45 °, 22.5 °.
The key that this utility model overcomes prior art not enough is in two isometrical angle parallel extrusion passages to set up rotation
Passage, isometrical angle parallel extrusion passage mainly provide the accumulation that detrusion area completes large plastometric set amount, and rotating channel is main
It is for changing the rotary billet direction of extrusion.Generally rectangular cross-section samples can be changed by directly increasing not variable cross-section twisting pathway
The single pass direction of extrusion, and this utility model employs round variation ellipse and is rounded again and spin crossover for the feature of circular cross-section
Principle, change the rotary squeezing direction of circular cross-section sample, area of section keeps constant in extrusion process, with realize exist
The uniform big plastic strain amount accumulation of direction of extrusion rotation is completed under the process conditions of single pass extruding.
Those skilled in the art of the present technique are appreciated that unless otherwise defined all terms used herein (include technology art
Language and scientific terminology) with the application art in those of ordinary skill general understanding identical meaning.Should also
It is understood by, those terms defined in such as general dictionary are should be understood that with the meaning in the context with prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or excessively formal implication is explaining.
The implication of "and/or" described herein refers to the simultaneous situation of respective individualism or both and wraps
Including including.
It can also pass through between part that the implication of " connection " described herein can be being directly connected between part
Other parts are indirectly connected with.
With it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, by above-mentioned description, related work people
Member can carry out various change and modification completely in the range of without departing from this utility model technological thought.This reality
The content being not limited to new technical scope in description, it is necessary to its technology is determined according to right
Property scope.
Claims (6)
1. the isometrical angle parallel extrusion mould of a kind of rotating channel, including die and mold base, die are fixed on mold base,
Charging aperture is offered at the top of die, the side of die is provided with discharging opening, it is characterised in that：The wedge shaped shape of described die
Arrange, width from top to bottom becomes larger, its center of gravity is located at the bottom of die, and die is made up of front mould and rear mold, and front model
Chamber setting corresponding with rear model cavity, wherein, squeezing passage is formed in front model cavity and rear model cavity, the squeezing passage includes
Isometrical angle parallel extrusion passage, under isometrical angle parallel extrusion passage and rotating channel, the two ends of rotating channel are isometrical with upper respectively
Angle parallel extrusion passage, under isometrical angle parallel extrusion passage be connected, upper isometrical angle parallel extrusion passage connect with charging aperture and
Both are vertically arranged, under isometrical angle parallel extrusion passage connect with discharging opening, and under isometrical angle parallel extrusion passage it is isometrical with upper
Angle parallel extrusion passage is arranged in 90 °.
2. the isometrical angle parallel extrusion mould of rotating channel according to claim 1, it is characterised in that：Described rotating channel
Including the first rotating channel and the second rotating channel, both are sequentially connected with, wherein, the first rotating channel is parallel with upper isometrical angle to be squeezed
Pressure passageway is arranged in 90 ° of angles, and the first rotating channel isometrical angle parallel extrusion passage with is parallel；Second rotating channel with it is first-class
Footpath angle parallel extrusion passage be arranged in parallel, and the second rotating channel isometrical angle parallel extrusion passage with is arranged in 90 ° of angles；Its
In, the first rotating channel, the second rotating channel inner section by circular cross-section, elliptic cross-section, circular cross-section gradual change, and
In one rotating channel, the second rotating channel, each area of section remains constant.
3. the isometrical angle parallel extrusion mould of rotating channel according to claim 1, it is characterised in that：Described rotating channel
Isometrical angle parallel extrusion mould also includes the drift directly over die, and which passes through drift fixing device and fastens outside drift
On portion's press ram, by external pressure machine imposed load press-in die；Described drift fixing device includes that short T-slot is used
Bolt, big nut, big pad and drift fixed block, drift fixed block are placed in above die, by short T-slot bolt, big spiral shell
Female, big pad is fixed.
4. the isometrical angle parallel extrusion mould of rotating channel according to claim 1, it is characterised in that：The die is by recessed
Mould fixing device is fixed on mold base, and described die fixing device includes two die fixed blocks, long T-slot spiral shell
Bolt, big nut and big pad, die fixed block band incline inner groovy, are fixed by long T-slot bolt, big nut and big pad
On mold base, its angle of inclination is consistent with die wedge shape inclination angle, is separately fixed at die both sides, the inclination of die fixed block
Inner groovy is fitted with die fixation.
5. the isometrical angle parallel extrusion mould of rotating channel according to claim 1, it is characterised in that：Die is adopted
Cr12MoV steel is manufactured；The interior angle Φ of rotating channel is 90 °, and exterior angle Ψ is 20 °, and lift angle is 80 °, and the oval factor is 1.35.
6. the isometrical angle parallel extrusion mould of rotating channel according to claim 2, it is characterised in that：First rotating channel,
Second rotating channel inner section is by circular cross-section, elliptic cross-section, circular cross-section gradual change, the wherein change of elliptic cross-section
Angle is followed successively by 67.5 °, 45 °, 22.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621085616.4U CN206104576U (en) | 2016-09-27 | 2016-09-27 | Rotatory parallel extrusion die in passageway constant diameter angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621085616.4U CN206104576U (en) | 2016-09-27 | 2016-09-27 | Rotatory parallel extrusion die in passageway constant diameter angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206104576U true CN206104576U (en) | 2017-04-19 |
Family
ID=58520850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621085616.4U Expired - Fee Related CN206104576U (en) | 2016-09-27 | 2016-09-27 | Rotatory parallel extrusion die in passageway constant diameter angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206104576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309112A (en) * | 2021-12-30 | 2022-04-12 | 福州大学 | Novel Bc equal channel angular extrusion die |
-
2016
- 2016-09-27 CN CN201621085616.4U patent/CN206104576U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309112A (en) * | 2021-12-30 | 2022-04-12 | 福州大学 | Novel Bc equal channel angular extrusion die |
| CN114309112B (en) * | 2021-12-30 | 2024-03-19 | 福州大学 | Novel Bc constant diameter angle extrusion die |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170419 Termination date: 20170927 |
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| CF01 | Termination of patent right due to non-payment of annual fee |