CN202963028U - Mold for preparing magnesium alloy plates based on multistage continuous corner shear deformation - Google Patents
Mold for preparing magnesium alloy plates based on multistage continuous corner shear deformation Download PDFInfo
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- CN202963028U CN202963028U CN 201220743825 CN201220743825U CN202963028U CN 202963028 U CN202963028 U CN 202963028U CN 201220743825 CN201220743825 CN 201220743825 CN 201220743825 U CN201220743825 U CN 201220743825U CN 202963028 U CN202963028 U CN 202963028U
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Abstract
The utility model discloses a mold for preparing magnesium alloy plates based on multistage continuous corner shear deformation. A plurality of sections of step type channels which are crooked continuously are arranged in the mold. The heights of each section of channel are equal. The included angles among every two adjacent channels are the same, and the inner side fillet radiuses among every two adjacent channels are the same. The multistage continuous corner shear deformation mold is convenient to manufacture. To-be-processed plates can generate large shear deformation when the plates pass through the mold, and large strain accumulation is achieved in the process of single-channel rolling, and therefore production efficiency is improved notably, plate texture and regulate and control texture can be effectively refined, the obtained magnesium alloy plates are good in comprehensive mechanical property, and low-temperature stamping property is improved greatly.
Description
Technical field
The utility model relates to a kind of mould for preparing magnesium alloy plate, relates in particular to a kind of mould based on multistage continuous corner shearing distortion preparation magnesium alloy plate.
Background technology
Magnesium alloy has that density is low, high specific strength, high specific stiffness, thermal conductivity is good, electromagnetic wave shielding is excellent, to the absorption advantages of higher of vibration and impact energy, be very important lightweight structure green engineering material, be with a wide range of applications in the Environment Science such as automobile, electronics, Aero-Space field.In recent years, in casting field, some new production technology and technology, all be used to the development of new magnesium alloy materials, and make great progress.Compare with the as cast condition material of these explained hereafter, deformed magnesium alloy material has more development prospect and potentiality, can various plate, rod, pipe, section bar and the forging products of production size by distortion, and can be by the control of material structure and the application of Technology for Heating Processing, the intensity that acquisition is higher than casting magnesium alloy material, better ductility, more diversified mechanical property, thereby the needs of satisfied more structural members.Therefore, the development of high-performance wrought magnesium alloy has become the study hotspot of current Material Field.
Having its source in of restriction wrought magnesium alloy development: at first, most magnesium alloys are close-packed hexagonal structure, and under room temperature, slip system is few, adopt traditional Technology of Plastic Processing to be difficult to address this problem.Secondly, magnesium alloy easily forms strong basal plane texture in deformation process.In magnesium alloy plate pair rolling when distortion,, under effect of stress, slide surface goes to the direction vertical with maximum crushing stress adding, and result forms the basal plane basal plane texture parallel with plate surface.Have the magnesium alloy plate of basal plane texture when secondary forming, basal slip is to be difficult to start because being in hard orientation.The 3rd, adopt traditional process technology to be difficult to the mutual coordination that realizes that grain refinement and texture are controlled.During less than certain size, material can present obvious ductility to be changed, thereby can significantly improve by the mode of crystal grain thinning the mechanical property of magnesium alloy plate when crystal grain.And adopt traditional extruding, rolling and annealing treating process subsequently, and usually not remarkable to the improvement effect of sheet material basal plane texture although its crystallite dimension can reach below 10 μ m, still be difficult to satisfy the requirement to high performance material.
Therefore, in crystal grain thinning, the texture of further improving sheet material is the development important directions of preparation high performance magnesium alloy board.Degree of depth plastic deformation is remarkable crystal grain thinning not only, obtains Ultra-fine Grained, and the remarkable texture of controlled material, thereby makes material obtain the comprehensive mechanical property of excellence.
At present, most degree of depth plastic deformation technology is mainly for the preparation of section bar or bar.for magnesium alloy plate, existing degree of depth plastic deformation process, except having the defectives such as prepared scantling specification is limited, cost is high, process route is complicated, production efficiency is low, also there are some defectives and deficiency aspect the control of magnesium alloy plate microstructure and preparation, as accumulate ply rolling (Accumulative roll bonding, ARB), large strain hot rolling (Large strain hot rolling, LSHR) technique is difficult to realize the effective control to sheet material texture, shear continuously (Conshearing) and continuous constraint strip and shear (Continuous confined strip shearing, C2S2) though technique all can realize the continuous large plastometric set of sheet material, form detrusion texture, but obtain fine grained texture, all need repeat process for several times (for magnesium alloy, also need repeatedly heat blank), in addition, Conshearing technique need to adopt the special milling train with planetary rollers, for C2S2 technique, in order to provide enough large extruding force to make band smoothly by ECAE mould corner, increase its frictional force with this feeding roller Surface Machining is fluted, had a strong impact on the surface quality of band, in addition, these two kinds of techniques all can only prepare a kind of sheet material of thickness.
In recent years, domestic Hunan University Chen Zhenhua has proposed a kind of equal channel angular rolling technique (equal channel angular rolling, ECAR) and mould thereof that can be used for sheet material processing, and has designed the ECAR device that carries out on common double roller calender.But have some defectives when adopting ECAR technique to prepare high-performance wrought magnesium alloy sheet material: 1. after ECAR, the microstructure of sheet material does not have remarkable refinement, and along with the increase of rolling pass, crystal grain is alligatoring on the contrary.2. when ECAR road number of times reached to certain numerical value, the grain orientation improvement effect of sheet material weakened.3. the efficient for preparing high-performance wrought magnesium alloy sheet material is low.In sum, these drawbacks limit of traditional E CAR technique the high-performance wrought magnesium alloy preparation of plates.
Summary of the invention
For the prior art above shortcomings, the utility model provides a kind of can effectively control magnesium alloy plate grain refinement and Texture Evolution, thus the mould of the rolling magnesium alloy plate of multistage continuous corner shearing distortion of mechanical property, forming property and the production efficiency of raising magnesium alloy plate.The utility model can be realized producing large detrusion and strain accumulation, the grain refinement of more effective control magnesium alloy plate and Texture Evolution in the one-pass roller distortion.
To achieve these goals, the utility model adopts following technical scheme: the mould of the rolling magnesium alloy plate of multistage continuous corner shearing distortion, comprise die ontology, it is characterized in that: be provided with passage in die ontology, passage has access portal and outlet, passage is step, has the multistage step that is communicated with successively, consists of the passage of continuous bend; The height of every section passage is equal, and adjacent two sections interchannel angles are equal, and adjacent two sections interchannel inboard radiuss of corner equate.
Be further characterized in that, in die ontology, the shape of respective channel is provided with some heating tubes.
Described passage is three stage stepwises, is made of the first horizontal channel section, the first slanted channel section, the second horizontal channel section, the second slanted channel section and the 3rd horizontal channel section, forms the passage of continuous bend; The height of each horizontal channel section and slanted channel section equates, H1=H2=H3=H4=H5; Between adjacent level channel section and slanted channel section, angle equates, θ 1=θ 2=θ 3=θ 4; Between adjacent level channel section and slanted channel section, inboard radius of corner equates, r1=r2=r3=r4, and the center line of every section horizontal channel section parallels, and the distance of adjacent two horizontal channel section center lines equates, K1=K2.
Compared to existing technology, the utility model beneficial effect is as follows:
1, the utility model is due to the technique that adopts rolling and multistage continuous corner shearing distortion to combine, make processed sheet material produce large detrusion by multistage continuous corner shearing mould the time, and realized large strain accumulation in the one-pass roller process, thereby more effective refinement sheet material tissue and regulation and control texture, the magnesium alloy plate of gained shows excellent comprehensive mechanical property, and the low temperature punching performance increases substantially.
2, process of the present utility model is simple, installs easily manufacturedly, and production efficiency significantly improves, can more effective microstructure and the grain orientation that improves magnesium alloy plate, thus improve comprehensive mechanical property and the suitability for secondary processing of magnesium alloy plate.Due to the passage continuous bend, once the rolling traditional E CAR that is equivalent to repeatedly is out of shape, and has avoided the repeated disassembled and assembled that repeatedly heats, repeats rolling and mould of sheet material, and the production efficiency of high performance magnesium alloy board is obviously improved.
3, the further refinement of crystal grain.The sheet material alligatoring of crystal grain in the heat tracing process repeatedly when not only having avoided traditional E CAR, realized that also single pass rolls in distortion the acquisition of large strain and (avoided on the one hand sheet metal thickness in multi-pass ECAR deformation process to reduce the problem that causes equivalent strain to reduce, on the other hand by increasing the continuous corner shearing number of times, adjusting adjacent two sections interchannel angles and the inboard radius of corner of adjacent two sections passages etc., realized the accumulation of a plurality of equivalent strain amounts in single rolling deformation process), therefore, be improved aspect grain refining effect.
4, grain orientation further improves.Avoided in multi-pass ECAR deformation process sheet material in every time common grain-oriented increase of (0002) basal plane when rolling, and along with the road number of times increases the reduction that sheet metal thickness reduces to cause shearing strain quantity.In addition, roll sheet material in deformation process at single and can experience continuously the effect of repeatedly detrusion in different moulds corners.Therefore, sheet material grain orientation improvement effect is strengthened.
Description of drawings
Fig. 1 is the utility model mould structure schematic diagram;
Fig. 2 is the utility model mold work structural representation.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, the mould of the rolling magnesium alloy plate of the multistage continuous corner shearing distortion of the utility model, comprise die ontology 1, be provided with passage 2 in die ontology 1, passage 2 has access portal 3 and outlet 4, and passage 2 is step, has the multistage step (some stages rank) that is communicated with successively, be communicated with successively to consist of the passage of continuous bend, magnesium alloy plate is passed through in passage 2; In die ontology 1, the shape of respective channel 2 is provided with some heating tubes 5, starts when needed heating tube 5 and produces heat so that the temperature of passage 2 reaches technological requirement; Heating tube 5 is arranged on the one-sided or bilateral of passage 2, and the best is arranged on the both sides of passage 2, so that temperature is even; Heating tube 5 adopts existing heating arrangements, as electric heating tube etc.
Shown in figure, passage 2 is three stage stepwises, three stage rank are communicated with successively, consisted of by the first horizontal channel section 21, the first slanted channel section 22, the second horizontal channel section 23, the second slanted channel section 24, the 3rd horizontal channel section 25, form the passage of continuous bend, for pending magnesium alloy plate 6 by and produce large detrusion.
Every section horizontal channel section of passage 2 and the height of slanted channel section equate, the H in figure
1=H
2=H
3=H
4=H
5, and between adjacent horizontal channel section and slanted channel section, angle equates, the θ in figure
1=θ
2=θ
3=θ
4The height of every section horizontal channel section and slanted channel section should equate with sheet metal thickness, and angle is between 100 °-160 °, and between adjacent horizontal channel section and slanted channel section, inboard radius of corner equates, r1=r2=r3=r4 in figure, the center line of every section horizontal channel section parallels; The horizontal channel section parallels, and the distance between parallel horizontal channel section center line equates, the K1=K2 in figure, and the corner shearing frequency n is odd number or even number.
As shown in Figure 1, 2, mould of the present utility model is when coordinating installation, access portal 3 is corresponding with the outlet of the two rolls 7 of hot-rolling mill, be arranged on the back of the outlet of two rolls 7, magnesium alloy plate 6 is after the two rolls 7 of hot-rolling mill commonly used are rolling, in access portal 3 enters the passage 2 of multistage continuous corner shearing distortion mould smoothly, produce large detrusion.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (3)
1. prepare the mould of magnesium alloy plate based on multistage continuous corner shearing distortion, comprise die ontology (1), it is characterized in that: be provided with passage (2) in die ontology (1), passage (2) has access portal (3) and outlet (4), passage (2) is step, have multistage step, connect and compose successively the passage of continuous bend; Every section channel height is equal, and adjacent two sections interchannel angles are equal, and the inboard radius of corner of adjacent two sections interchannels equates.
2. the mould based on multistage continuous corner shearing distortion preparation magnesium alloy plate according to claim 1, is characterized in that, in die ontology (1), the shape of respective channel (2) is provided with some heating tubes (5).
3. many moulds based on multistage continuous corner shearing distortion preparation magnesium alloy plate according to claim 1 and 2, it is characterized in that, described passage (2) is three stage rank, consisted of by the first horizontal channel section (21), the first slanted channel section (22), the second horizontal channel section (23), the second slanted channel section (24) and the 3rd horizontal channel section (25), be in turn connected to form the passage of continuous bend; The height of each channel section equates, H
1=H
2=H
3=H
4=H
5Between adjacent level channel section and slanted channel section, angle equates, θ
1=θ
2=θ
3=θ
4Between adjacent level channel section and slanted channel section, inboard radius of corner equates, r
1=r
2=r
3=r
4, the center line of every section horizontal channel section parallels, and the distance of adjacent two horizontal channel section center lines equates, K
1=K
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220743825 CN202963028U (en) | 2012-12-29 | 2012-12-29 | Mold for preparing magnesium alloy plates based on multistage continuous corner shear deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220743825 CN202963028U (en) | 2012-12-29 | 2012-12-29 | Mold for preparing magnesium alloy plates based on multistage continuous corner shear deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202963028U true CN202963028U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220743825 Expired - Fee Related CN202963028U (en) | 2012-12-29 | 2012-12-29 | Mold for preparing magnesium alloy plates based on multistage continuous corner shear deformation |
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|---|---|
| CN (1) | CN202963028U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107214196A (en) * | 2017-07-13 | 2017-09-29 | 太原科技大学 | A kind of detrusion device of magnesium alloy equal channel angular rolling |
-
2012
- 2012-12-29 CN CN 201220743825 patent/CN202963028U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107214196A (en) * | 2017-07-13 | 2017-09-29 | 太原科技大学 | A kind of detrusion device of magnesium alloy equal channel angular rolling |
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|---|---|---|---|
| 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: 20130605 Termination date: 20151229 |
|
| EXPY | Termination of patent right or utility model |