CN106881369B - A kind of two-way composite extrusion die and extrusion process of magnesium alloy plate and belt - Google Patents
A kind of two-way composite extrusion die and extrusion process of magnesium alloy plate and belt Download PDFInfo
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- CN106881369B CN106881369B CN201710251009.3A CN201710251009A CN106881369B CN 106881369 B CN106881369 B CN 106881369B CN 201710251009 A CN201710251009 A CN 201710251009A CN 106881369 B CN106881369 B CN 106881369B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 108
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 91
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000007704 transition Effects 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000265 homogenisation Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000005242 forging Methods 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001607 magnesium mineral Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
Abstract
The present invention discloses the two-way composite extrusion die and extrusion process of a kind of magnesium alloy plate and belt.Including die ontology, left end connects extrusion cylinder, inside is axially arranged with the front squeezing passage, transition passage, side squeezing passage, exit passageway being docked and connected along it from left to right, the extrusion chamber of front squeezing passage left end and extrusion cylinder is docked and connected, it is aforementioned be arbitrarily docked and connected locate the cross section of two sides component shape is identical and area equation；The cross section of front squeezing passage and side squeezing passage gradually becomes smaller from left to right, and the cross section of the extrusion chamber of extrusion cylinder, transition passage and exit passageway is equal from left to right；The shape of cross section of cross section and magnesium alloy blank of the extrusion chamber of extrusion cylinder is identical and area equation, front squeezing passage right end, transition passage, side squeezing passage and exit passageway cross section be rounded corner rectangle.The present invention can prepare high plastic magnesium alloy Strip.
Description
Technical field
The invention belongs to metal material processing technical fields, and in particular to a kind of two-way Compound Extrusion of magnesium alloy plate and belt
Mold and extrusion process.
Background technique
Magnesium alloy is important lightweight structural material, compared with steel and aluminium alloy, not only specific strength with higher and ratio
Rigidity, and there is excellent heat dissipation performance, electromagnetic shielding performance, damping performance and machining property, product is answered extensively
For fields such as aerospace, automobile and military projects.China has magnesium resource abundant, and magnesium mineral products account for the 60% of world's gross reserves
More than, and China market is huge, magnesium alloy in terms of have a high potential.However the application of China's magnesium alloy is also in primary
Stage, former magnesium yield occupy first place in the world, but mostly with primary exporting, Additional Value of Commodities is lower.Greatly develop magnesium alloy depth
Processing industry, the magnesium resource advantage in China, which is converted into industrial advantage and technical advantage, becomes the development side of China's magnesium alloy industry
To.
Magnesium alloy thin plate and band has important answer in the 3C Products industrial circle such as mobile phone, camera, video camera and laptop
With and have a high potential.However, the crystal structure due to magnesium alloy is close-packed hexagonal structure, slip system is less at room temperature, moulding
Deformability is poor, and plastic process product often forms strong basis plane texture, leads to secondary processing cost height.This greatly limits
The application of magnesium alloy sheet band.The preparation method for developing a kind of magnesium alloy thin plate and band of high-ductility has great importance.
Extrusion process is one of the important productive of high-performance magnesium alloy sheet band.Currently, magnesium alloy in industrial production
Extrusion deformation process often use unidirectionally extruded deformation, squeezing temperature is usually 300 ~ 450 DEG C, extrusion ratio generally 10: 1 ~
100: 1, extrusion speed is usually 0.5 ~ 2m/min.In order to prevent the temperature difference between mold and crack, frequently with isothermal
It squeezes.This traditional unidirectionally extruded deformation method, easily generation strong basis plane texture and banded structure, are unfavorable for subsequent be rolled into
Type or post forming.Weakening basal plane texture becomes the important method for improving magnesium alloy post forming.
Important feature when magnesium alloy deformation is exactly texture of the crystal grain C axis easy to form perpendicular to compression axis direction.
Multiway forging makes magnesium alloy successively carry out compressive deformation in different directions when deforming, and compression axis direction has been converted, so that brilliant
Grain deformation is more uniform, may finally significantly weaken basal plane texture and improve structural homogenity, so as to improve post forming.And
The shortcomings that multiway forging deforms is: being also easy to produce and splits since stress state is not three-dimensional compressive state in the edge of magnesium alloy block
Line.
Summary of the invention
To overcome existing magnesium alloy plate and belt existing defect, mesh of the invention when extrusion process and multiway forging deform
Be the two-way composite extrusion die and extrusion process of a kind of magnesium alloy plate and belt are provided.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of two-way composite extrusion die of magnesium alloy plate and belt: including die ontology, the left end of die ontology is fixed to be connected
It is connected to extrusion cylinder, is successively arranged the front squeezing passage being docked and connected, mistake along its axial direction by left end to right end inside die ontology
Crossing channel, side squeezing passage, exit passageway, the extrusion chamber of front squeezing passage left end and extrusion cylinder is docked and connected, and aforementioned
Meaning be docked and connected locate the cross section of two sides component shape is identical and area equation；Front squeezing passage and side squeezing passage
Cross section gradually becomes smaller from left to right, and the cross section of the extrusion chamber of extrusion cylinder, transition passage and exit passageway is from left to right
It is equal；The shape of cross section of cross section and magnesium alloy blank of the extrusion chamber of extrusion cylinder is identical and area equation, front squeeze
Channel right end, transition passage, side squeezing passage and exit passageway cross section be rounded corner rectangle.
Preferably, the extrusion ratio of front squeezing passage is 1.5:1 ~ 30:1, the extrusion ratio of side squeezing passage be 1.04:1 ~
2:1, length≤50mm of transition passage.
Preferably, die ontology, extrusion cylinder cross section is equal from left to right and cross section with magnesium alloy blank
Shape is identical.
Preferably, the shape of magnesium alloy blank is cylindrical, slab ingot shape or cuboid.
Preferably, cylindrical magnesium alloy blank specification are as follows: 80 ~ 1000mm of diameter, long 500 ~ 2000mm；Slab ingot shape is rectangular
The specification of bodily form magnesium alloy blank are as follows: thickness 1 ~ 50mm, wide 80 ~ 1000mm, long 500 ~ 2000mm.
Using the method for the two-way composite extrusion die extrusion forming magnesium alloy plate and belt, include the following steps:
Step 1: being first heated to 250 ~ 450 DEG C for magnesium alloy blank, keeps the temperature 0.5 ~ 2h, while heating mould ontology and squeezing
After pressure cylinder, die ontology and extrusion cylinder isothermal and 0 ~ 30 DEG C lower than magnesium alloy blank temperature, die ontology and extrusion cylinder heating
The extrusion chamber of extrusion cylinder, transition passage, side squeezing passage, uniformly smears lubricant in exit passageway at front squeezing passage；
Step 2: after magnesium alloy blank, die ontology and extrusion cylinder all reach assigned temperature, magnesium alloy blank is put into crowded
In the extrusion chamber of pressure cylinder, applies pressure from the rear end of magnesium alloy blank and carry out constant speed extruding, pass through magnesium alloy blank successively just
Face squeezing passage, transition passage, side squeezing passage, exit passageway are to get magnesium alloy plate and belt.
Preferably, extrusion speed is 0.3 ~ 3m/min.
Preferably, the magnesium alloy blank is magnesium alloy cast blank or other hot-working blanks through Homogenization Treatments.
In the present invention, the cross section refers to the section perpendicular to axial direction (magnesium alloy blank direction of advance).
The utility model has the advantages that
1, the advantages of present invention incorporates both extrusion processes and multiway forging deformation, the shortcomings that having evaded them, uses
A kind of two-way composite extrusion die and extrusion process, that is, pass sequentially through that front squeezes and side is squeezed and deformed, to weaken base
Plane texture simultaneously improves structural homogenity, to prepare high plastic magnesium alloy Strip (elongation be higher than 18%), significantly improve secondly
Secondary molding and subsequent roll forming；
2, extrusion process of the present invention is simple, and device therefor is easy to transplant and operate, at low cost, is suitable for industrial metaplasia
It produces, and then the application of magnesium alloy plate can be expanded.
Detailed description of the invention
Fig. 1: under use state, the longitudinal section view of the two-way composite extrusion die of the present invention；
Fig. 2: under use state, the sectional elevation of the two-way composite extrusion die of the present invention；
Fig. 3: when the shape of magnesium alloy blank is cylindrical, the left cross-sectional view of the two-way composite extrusion die of the present invention；
Fig. 4: when the shape of magnesium alloy blank is slab ingot shape, the left cross-sectional view of the two-way composite extrusion die of the present invention；
Fig. 5: when the shape of magnesium alloy blank is cuboid, the left cross-sectional view of the two-way composite extrusion die of the present invention；
Wherein, appended drawing reference are as follows: 1- hydraulic press compression bar, 2- extrusion cylinder, 3- magnesium alloy blank, 4- die ontology, the front 5-
Squeezing passage, 6- transition passage, the side 7- squeezing passage, 8- exit passageway.
Specific embodiment
Technical solution of the present invention is described in further detail combined with specific embodiments below, but protection model of the invention
It encloses and is not limited thereto.
Embodiment 1
For being cylindrical (diameter 500mm, long 1000mm) with the shape of magnesium alloy blank.
As shown in Fig. 1 ~ 3, a kind of two-way composite extrusion die of magnesium alloy plate and belt: including cylindrical die ontology 4, mould
The left end of tool ontology 4 is fixedly connected with cylindrical press cylinder 2, is axially successively set by left end to right end along it inside die ontology 4
There are the front squeezing passage 5 being docked and connected, transition passage 6, side squeezing passage 7, exit passageway 8,5 left end of front squeezing passage
Be docked and connected with the extrusion chamber of extrusion cylinder 2, it is aforementioned be arbitrarily docked and connected locate the cross section of two sides component shape is identical and area
It is equal；The cross section of front squeezing passage 5 and side squeezing passage 7 gradually becomes smaller from left to right, the extrusion chamber of extrusion cylinder 2,
The cross section of transition passage 6 and exit passageway 8 is equal from left to right；5 left end of extrusion chamber and front squeezing passage of extrusion cylinder 2
Cross-sectional shape be that round, cross-sectional area is equal with the cross-sectional area of magnesium alloy blank 3, front squeezing passage 5
Right end, transition passage 6, side squeezing passage 7 and exit passageway 8 cross section be rounded corner rectangle, and transition passage 6
The cross-sectional area of cross-sectional area > exit passageway 8, cross-sectional area=target magnesium alloy plate and belt cross of exit passageway 8
Area of section.Wherein, the extrusion ratio of front squeezing passage 5 is 8:1, and the extrusion ratio of side squeezing passage 7 is 1.5:1, and transition is logical
The length in road 6 is 50mm.
Using the method for the two-way composite extrusion die extrusion forming magnesium alloy plate and belt, include the following steps:
Step 1: first by the magnesium alloy blank 3(magnesium alloy cast blank through Homogenization Treatments) 350 DEG C are heated to, heat preservation
1h, while heating mould ontology 4 and extrusion cylinder 2, die ontology 4 and 2 isothermal of extrusion cylinder and 20 DEG C lower than magnesium alloy blank temperature,
Die ontology 4 and with extrusion cylinder 2 heat after the extrusion chamber of extrusion cylinder 2, front squeezing passage 5, transition passage 6, side squeeze
Lubricant is uniformly smeared in channel 7, exit passageway 8；
Step 2: magnesium alloy blank 3(magnesium alloy cast blank), die ontology 4 and extrusion cylinder 2 all reach assigned temperature
Afterwards, by magnesium alloy blank 3(magnesium alloy cast blank) it is put into the extrusion chamber of extrusion cylinder 2, it is cast from magnesium alloy blank 3(magnesium alloy
Make blank) rear end using hydraulic press compression bar 1(shape be cylinder) carry out constant speed extruding (extrusion speed 1.5m/min), make
Magnesium alloy blank 3(magnesium alloy cast blank) successively by front squeezing passage 5, transition passage 6, side squeezing passage 7, outlet
Channel 8, realization front is squeezed and deformed and side is squeezed and deformed and obtains magnesium alloy plate and belt.
Utilize the elongation rate test result of Strip obtained by above-mentioned two-way composite extrusion die molding different type magnesium alloy
It is shown in Table 1.
As can be seen from Table 1: the present invention uses two-way composite extrusion die and extrusion process, that is, passes sequentially through front
It squeezes and side is squeezed and deformed, basal plane texture can be weakened and improve structural homogenity, to prepare high plastic magnesium alloy plate
Band, elongation are higher than 18%, significantly improve its post forming and subsequent roll forming.
Embodiment 2
The difference from embodiment 1 is that: the shape of magnesium alloy blank 3 is slab ingot shape, and die ontology 4, squeezes extrusion cylinder 2
The extrusion chamber of cylinder 2, the shape of hydraulic press compression bar 1 are slab ingot shape, and the shape of 5 left end of front squeezing passage is also with magnesium alloy blank
Shape and occur to change accordingly, the structure of the two-way composite extrusion die of this example is as shown in Fig. 1,2,4.
Embodiment 3
The difference from embodiment 1 is that: the shape of magnesium alloy blank 3 is cuboid, and die ontology 4, squeezes extrusion cylinder 2
The extrusion chamber of pressure cylinder 2, the shape of hydraulic press compression bar 1 are cuboid, and the shape of 5 left end of front squeezing passage is also with magnesium alloy
The shape of blank and occur to change accordingly, the structure of the two-way composite extrusion die of this example is as shown in Fig. 1,2,5.
Claims (8)
1. a kind of two-way composite extrusion die of magnesium alloy plate and belt, it is characterised in that: including die ontology, a left side for die ontology
End is fixedly connected with extrusion cylinder, is successively arranged the front being docked and connected inside die ontology along its axial direction by left end to right end and squeezes
The extrusion chamber of channel, transition passage, side squeezing passage, exit passageway, front squeezing passage left end and extrusion cylinder is docked and connected,
It is aforementioned be arbitrarily docked and connected locate the cross section of two sides component shape is identical and area equation；Front squeezing passage and side squeeze
The cross section in channel gradually becomes smaller from left to right, the cross section of the extrusion chamber of extrusion cylinder, transition passage and exit passageway from
From left to right is equal；The shape of cross section of cross section and magnesium alloy blank of the extrusion chamber of extrusion cylinder is identical and area equation, just
Face squeezing passage right end, transition passage, side squeezing passage and exit passageway cross section be rounded corner rectangle.
2. the two-way composite extrusion die of magnesium alloy plate and belt as described in claim 1, it is characterised in that: front squeezing passage
Extrusion ratio be 1.5:1 ~ 30:1, the extrusion ratio of side squeezing passage is 1.04:1 ~ 2:1, length≤50mm of transition passage.
3. the two-way composite extrusion die of magnesium alloy plate and belt as described in claim 1, it is characterised in that: die ontology squeezes
The cross section of pressure cylinder is equal from left to right and the shape of cross section with magnesium alloy blank is identical.
4. the two-way composite extrusion die of magnesium alloy plate and belt as claimed in claim 3, it is characterised in that: magnesium alloy blank
Shape is cylindrical, slab ingot shape or cuboid.
5. the two-way composite extrusion die of magnesium alloy plate and belt as claimed in claim 4, it is characterised in that: cylindrical magnesium alloy
Blank specification are as follows: 80 ~ 1000mm of diameter, long 500 ~ 2000mm；The specification of slab ingot shape or cuboid magnesium alloy blank are as follows: thickness 1 ~
50mm, wide 80 ~ 1000mm, long 500 ~ 2000mm.
6. a kind of method of extrusion forming magnesium alloy plate and belt, which is characterized in that utilize any described pair such as claim 1 ~ 5
To composite extrusion die, include the following steps:
Step 1: being first heated to 250 ~ 450 DEG C for magnesium alloy blank, keeps the temperature 0.5 ~ 2h, while heating mould ontology and extrusion cylinder,
In extrusion cylinder after die ontology and extrusion cylinder isothermal and 0 ~ 30 DEG C lower than magnesium alloy blank temperature, die ontology and extrusion cylinder heating
Extrusion chamber, front squeezing passage, transition passage, side squeezing passage, uniformly smear lubricant in exit passageway；
Step 2: after magnesium alloy blank, die ontology and extrusion cylinder all reach assigned temperature, magnesium alloy blank is put into extrusion cylinder
Extrusion chamber in, from the rear end of magnesium alloy blank apply pressure carry out constant speed extruding, make magnesium alloy blank successively by front squeeze
Pressure passageway, transition passage, side squeezing passage, exit passageway are to get magnesium alloy plate and belt.
7. the method for extrusion forming magnesium alloy plate and belt as claimed in claim 6, it is characterised in that: extrusion speed be 0.3 ~
3m/min。
8. the method for extrusion forming magnesium alloy plate and belt as claimed in claims 6 or 7, it is characterised in that: the magnesium alloy base
Material is magnesium alloy cast blank or other hot-working blanks through Homogenization Treatments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251009.3A CN106881369B (en) | 2017-04-18 | 2017-04-18 | A kind of two-way composite extrusion die and extrusion process of magnesium alloy plate and belt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251009.3A CN106881369B (en) | 2017-04-18 | 2017-04-18 | A kind of two-way composite extrusion die and extrusion process of magnesium alloy plate and belt |
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| Publication Number | Publication Date |
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| CN106881369A CN106881369A (en) | 2017-06-23 |
| CN106881369B true CN106881369B (en) | 2019-01-01 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4093560A4 (en) * | 2018-11-15 | 2023-05-10 | The Regents Of The University Of Michigan | Extrusion of metal material using a dummy block having a curved surface |
| CN109877178A (en) * | 2019-04-17 | 2019-06-14 | 哈尔滨理工大学 | A kind of extrusion die and forming method of more dimensional thickness Mg-Al composite strips |
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| CN1827829A (en) * | 2006-03-22 | 2006-09-06 | 西安建筑科技大学 | Method and apparatus for preparing fine-grained material |
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