CN107214231A - A kind of processing method for improving aluminum alloy plate materials deep drawability - Google Patents
A kind of processing method for improving aluminum alloy plate materials deep drawability Download PDFInfo
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- CN107214231A CN107214231A CN201710458213.2A CN201710458213A CN107214231A CN 107214231 A CN107214231 A CN 107214231A CN 201710458213 A CN201710458213 A CN 201710458213A CN 107214231 A CN107214231 A CN 107214231A
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- aluminum alloy
- alloy plate
- plate materials
- punch
- pin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a kind of processing method for improving aluminum alloy plate materials deep drawability, including step：The outer margin contour of punch-pin to be contacted during deep-draw with aluminum alloy plate materials is stirred friction processing as machining path to the back side of the aluminum alloy plate materials；The aluminum alloy plate materials are carried out with deep-draw using the punch-pin, and control mixing yoghurt region is aligned with the outer rim of the punch-pin.The processing method of the raising aluminum alloy plate materials deep drawability provided using the present invention, partial operation is carried out to the plate back directly acted in punch-pin outer rim, form the mixing yoghurt region of a closing, because the introduced Strong shear deformation of stirring-head promotes sheet material to form { 111 } plane texture by force and ultra-fine equi-axed crystal in the region, thinned effect and crack initiation in punching course can be effective against, to being modified at the stress most concentration of sheet material during deep-draw in the way of partial operation, aluminum alloy plate materials single pass deep-draw amount is improved.
Description
Technical field
The present invention relates to technical field of metal surface processing, aluminum alloy plate materials deep-draw is improved more specifically to one kind
The processing method of performance.
Background technology
Aluminium alloy plate is a kind of industrial building materials, is used for industry-by-industry according to the difference of material.Aluminum alloy plate materials are as needed
Deep-draw part can be made by deep-draw processing.
The back portion that sheet material and punch-pin edge are directly contacted during metal deep-draw is by strong action of pulling stress, herein
At stress most concentration during for deep-draw, punching press reduction is high, and easily crack initiation causes deep drawing cracks.
The reason for deep drawing cracks, has a lot, and the internal organizational structure such as crystal orientation, grain size of sheet material produces shadow to it
Ring.Current aluminum alloy plate materials are primarily formed with β class texture, through Overheating Treatment mainly by hot rolling-cold rolling production of symmetric rolling
The recrystallization texture based on cubic texture is formed afterwards.The plastic strain ratio of above-mentioned two classes texture is low, and effect is thinned substantially, is to make
Into the main cause of aluminum alloy plate materials deep drawing cracks.On the other hand, its plasticity is poor during sheet material coarse grains, crackle easily germinates,
Extension, also results in sheet material deep-draw unstability.
In summary, how to efficiently solve aluminum alloy plate materials deep drawability it is poor crease easily, be thinned, problems of crack,
It is current those skilled in the art's urgent problem.
The content of the invention
In view of this, should it is an object of the invention to provide a kind of processing method for improving aluminum alloy plate materials deep drawability
Processing method can efficiently solve the problem of aluminum alloy plate materials deep drawability is poor to crease easily, be thinned, ftractureing.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of processing method for improving aluminum alloy plate materials deep drawability, including step：
Using the outer margin contour of punch-pin that is contacted during deep-draw with aluminum alloy plate materials as machining path, to the aluminum alloy plate materials
The back side is stirred friction processing；
The aluminum alloy plate materials are carried out with deep-draw, and control mixing yoghurt region and the punch-pin using the punch-pin
Outer rim alignment.
Preferably, it is described to the aluminum alloy plate materials in the processing method of above-mentioned raising aluminum alloy plate materials deep drawability
The back side is stirred friction processing, specifically includes：
The back side of the aluminum alloy plate materials is carried out by center line of the machining path, predetermined width value for ring width stirring
Friction processing.
Preferably, in the processing method of above-mentioned raising aluminum alloy plate materials deep drawability, the predetermined width value is more than described
The arc length of rounding at the outer rim of punch-pin.
Preferably, in the processing method of above-mentioned raising aluminum alloy plate materials deep drawability, the outer rim of the punch-pin is circle, just
Square or pentagon.
Preferably, in the processing method of above-mentioned raising aluminum alloy plate materials deep drawability, it is characterised in that described to be stirred
Friction processing, is specifically included：
Friction processing is stirred using the stirring-head with mixing needle and the shaft shoulder, and the stirring face of the shaft shoulder is in circle
Shape.
Preferably, in the processing method of above-mentioned raising aluminum alloy plate materials deep drawability, the diameter of the shaft shoulder is more than described
The arc length of rounding at the outer rim of punch-pin.
The processing method of the raising aluminum alloy plate materials deep drawability provided using the present invention, with during deep-draw and aluminum alloy plate materials
The outer rim of the punch-pin of contact is machining path, and friction processing is stirred to the back side of aluminum alloy plate materials；Recycle above-mentioned punch-pin
Aluminum alloy plate materials are carried out with deep-draw, and control mixing yoghurt region is aligned with the outer rim of punch-pin.Namely to outside punch-pin
Plate back that edge is directly acted on carries out partial operation, formed in the mixing yoghurt region of a closing, the region due to
The introduced Strong shear deformation of stirring-head promotes sheet material to form { 111 } plane texture by force, and { 111 } crystal face is the solid matter of aluminium alloy crystal
Face, with the excellent formability energy such as isotropism and high-ductility strain ratio.Research shows when the crystal face rolls face parallel to sheet material
Can be effectively improved aluminum alloy plate materials occur in punching course thickness be thinned, so as to prevent deep drawing cracks.Meanwhile, stirring-head promotees
The severe plastic deformation for enabling processing district to produce makes the ultra-fine crystallization of sheet material, forms ultra-fine equi-axed crystal.Thus, pass through stirring
Friction processing can be effective against thinned effect and the crack initiation in punching course, to deep-draw process in the way of partial operation
It is modified at the stress of middle sheet material most concentration, improves aluminum alloy plate materials single pass deep-draw amount.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 illustrates for the flow of the processing method of the raising aluminum alloy plate materials deep drawability of one specific embodiment of the present invention
Figure；
Fig. 2 is the deep-draw structural representation of punch-pin；
Fig. 3 is a kind of schematic diagram in mixing yoghurt region at the aluminum alloy plate materials back side；
Fig. 4 is the schematic diagram in another mixing yoghurt region at the aluminum alloy plate materials back side；
Fig. 5 is the pole figure of conventional aluminum alloys sheet material 111；
Fig. 6 is the agitated pole figure of friction treatment aluminum alloy plate materials 111.
Marked in accompanying drawing as follows：
Punch-pin 1, aluminum alloy plate materials 2, mixing yoghurt region 21.
Embodiment
The embodiment of the invention discloses a kind of processing method for improving aluminum alloy plate materials deep drawability, to improve aluminium alloy plate
Material deep drawability, it is to avoid it wrinkles, is thinned, cracking.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1-Fig. 4 is referred to, Fig. 1 is the processing of the raising aluminum alloy plate materials deep drawability of one specific embodiment of the present invention
The schematic flow sheet of method；Fig. 2 is the deep-draw structural representation of punch-pin；Fig. 3 is a kind of agitating friction at the aluminum alloy plate materials back side
The schematic diagram of machining area；Fig. 4 is the schematic diagram in another mixing yoghurt region at the aluminum alloy plate materials back side.
In a specific embodiment, the invention provides a kind of processing method for improving aluminum alloy plate materials deep drawability,
Comprise the following steps：
S1：Using the outer margin contour of punch-pin 1 that is contacted during deep-draw with aluminum alloy plate materials 2 as machining path, to aluminum alloy plate materials 2
The back side be stirred friction processing；
The pressed part that need to be molded according to aluminum alloy plate materials 2 selects suitable punch-pin 1, and the outer margin contour using punch-pin 1 is stirs
The machining path of friction processing is mixed, that is, using the edge contour of pressed part as machining path, to the back side of aluminum alloy plate materials 2
It is stirred friction processing.Specifically, the outer rim of punch-pin 1 can be the shapes such as circular, square or pentagon, can correspondingly
Stamp out that inside and outside contour is rounded, square or pentagonal Al-alloy parts, then it is respectively that size is consistent that machining path is corresponding
Circle, square and pentagon, mixing yoghurt region 21, the cubic shape annular of annular are gone out by mixing yoghurt
Mixing yoghurt region 21, or pentagon shape annular mixing yoghurt region 21.
S2：Aluminum alloy plate materials 2 are carried out with deep-draw using punch-pin 1, and control mixing yoghurt region 21 and punch-pin 1 is outer
Edge is aligned.
It that is to say and the outer rim alignment mixing yoghurt region 21 of punch-pin 1 is subjected to deep-draw, the outer margin contour of such as punch-pin 1 is
When circular, then it is annular to correspond to mixing yoghurt region 21, and the edge of punch-pin 1 alignment circular annular region is carried out into deep-draw.With
Though the back portion that the edge of punch-pin 1 is directly contacted is by strong action of pulling stress, because it passes through mixing yoghurt, stirring
Introduced Strong shear deformation promotes sheet material to form { 111 } plane texture by force and ultra-fine equi-axed crystal, thus is difficult in depth
Cracked when rushing.
The processing method of the raising aluminum alloy plate materials deep drawability provided using the present invention, with during deep-draw and aluminum alloy plate materials
The outer rim of the punch-pin 1 of 2 contacts is machining path, and friction processing is stirred to the back side of aluminum alloy plate materials 2；Recycle above-mentioned convex
Mould 1 carries out deep-draw to aluminum alloy plate materials 2, and control mixing yoghurt region 21 is aligned with the outer rim of punch-pin 1.Namely to
The plate back that the outer rim of punch-pin 1 is directly acted on carries out partial operation, forms the mixing yoghurt region 21 of a closing, the area
Because the introduced Strong shear deformation of stirring-head promotes sheet material to form { 111 } plane texture by force in domain, { 111 } crystal face is that aluminium alloy is brilliant
The solid matter face of body, with the excellent formability energy such as isotropism and high-ductility strain ratio.Research shows when the crystal face is parallel to plate
Material can be effectively improved when rolling face aluminum alloy plate materials 2 occur in punching course thickness be thinned, so as to prevent deep drawing cracks.Together
When, the severe plastic deformation that stirring-head promotes processing district to produce can make the ultra-fine crystallization of sheet material, form ultra-fine equi-axed crystal.Cause
And, thinned effect and crack initiation in punching course can be effective against by mixing yoghurt, with the side of partial operation
Formula improves the single pass deep-draw amount of aluminum alloy plate materials 2 to being modified at the stress most concentration of sheet material during deep-draw.
Specifically, being stirred friction processing to the back side of aluminum alloy plate materials 2 in above-mentioned steps S1, specifically include：
The back side of aluminum alloy plate materials 2 is carried out by center line of machining path, predetermined width value adds for the agitating friction of ring width
Work.
Such as machining path is circle, then using the circle as center line, and predetermined width value is stirred friction for ring width and processed, from
And process using the circle as center line, predetermined width is the annular mixing yoghurt region 21 of ring width.By the way that road will be processed
Footpath enables stress most concentrated area non-deformability during deep-draw to be effectively enhanced as center line, prevents crack initiation.
Certainly, the width in the corresponding mixing yoghurt region 21 in machining path both sides can also be moderately adjusted as needed.
Further, above-mentioned predetermined width value is more than the arc length of rounding at the outer rim of punch-pin 1.The outer rim of usual punch-pin 1
Locate as rounding, predetermined width value is more than the arc length of rounding, that is, the width in mixing yoghurt region 21 is more than rounding
The length at angle, is enhanced so that aluminum alloy plate materials 2 at correspondence rounding are effectively ensured, to reach to stress concentration during deep-draw
The improvement of area's forming property.
At the outer rim of punch-pin 1 be rounding when, the profile at 45 ° of the correspondence using rounding preferably as machining path,
Friction processing is stirred using the width more than its arc length as ring width.
In the various embodiments described above, friction processing is stirred in step S1, is specifically included：
Friction processing is stirred using the stirring-head with mixing needle and the shaft shoulder, and the stirring face of the shaft shoulder is rounded.One
As, mixing needle is located at the circle centre position in stirring face.The main function of mixing needle is material is sufficiently stirred in the process, same to time control
The flow direction of stirring tool adjacent material processed.The shaft shoulder mainly has two effects in the process：One is to rub to produce with workpiece surface
Heat amount；Two are to provide self-enclosed environment, prevent the metal of plasticizing from being overflowed from stirring area.The stirring face of the shaft shoulder is rounded,
Just it is to provide the self-enclosed environment of circular scope, and friction generates heat with workpiece surface.It is preferred that, default working width value is
Shaft shoulder width.The stirring-head of said structure is easy to be processed as machining path with the outer margin contour of punch-pin 1, forms corresponding strong
Change region.As needed, it can also be processed by other conventional agitating friction devices.
Further, the diameter of the shaft shoulder is more than the arc length of rounding at the outer rim of punch-pin 1.So as to when mixing needle edge processing road
When footpath is moved, the width that the shaft shoulder acts on aluminum alloy plate materials 2 is more than the arc length of rounding, so as to form roomy more than rounding arc
Long mixing yoghurt region 21.The diameter of the shaft shoulder can also be adjusted as needed, to meet wanting for different working widths
Ask.Or can also be by repeatedly processing, to meet the requirement in correspondence width mixing yoghurt region 21.
Fig. 2-Fig. 3 is referred to, Fig. 2 is the deep-draw structural representation of punch-pin 1；Fig. 3 stirs for the one kind at the back side of aluminum alloy plate materials 2
Mix the schematic diagram of friction machining area 21；In a preferred embodiment, punch-pin 1 is shaped as circle, true according to the shape of punch-pin 1
It is circle to determine the machining path of mixing yoghurt, using mixing yoghurt machine along the machining path to aluminum alloy plate materials
2 back sides are stirred friction processing, recycle the punch-pin 1 to carry out outside deep-draw, its convex mould 1 sheet material after mixing yoghurt
Edge is aligned with mixing yoghurt path.Punch-pin 1 is shaped as square, and corresponding machining path is stirred friction to be square
Mixing yoghurt region 21 is as shown in Figure 4 after processing.
It is the pole figure of conventional aluminum alloys sheet material 111 to refer to Fig. 5 and Fig. 6, Fig. 5；Fig. 6 is agitated friction treatment aluminium alloy plate
The pole figure of material 111.As illustrated, conventional aluminum alloys sheet material is practically free of { 111 } plane texture (as shown in Figure 5), therefore, aluminium alloy
Forming property is relatively low.And { 111 } plane texture content of aluminium alloy significantly improves (such as Fig. 6 after the application stirring friction treatment
It is shown), so as to be conducive to improving aluminium alloy forming property.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (6)
1. a kind of processing method for improving aluminum alloy plate materials deep drawability, it is characterised in that including step：
Using the outer margin contour of punch-pin that is contacted during deep-draw with aluminum alloy plate materials as machining path, to the back side of the aluminum alloy plate materials
It is stirred friction processing；
The aluminum alloy plate materials are carried out with deep-draw using the punch-pin, and control mixing yoghurt region and the punch-pin is outer
Edge is aligned.
2. the processing method according to claim 1 for improving aluminum alloy plate materials deep drawability, it is characterised in that described to institute
The back side for stating aluminum alloy plate materials is stirred friction processing, specifically includes：
The back side of the aluminum alloy plate materials is carried out by center line of the machining path, predetermined width value for ring width agitating friction
Processing.
3. the processing method according to claim 2 for improving aluminum alloy plate materials deep drawability, it is characterised in that described default
Width value is more than the arc length of rounding at the outer rim of the punch-pin.
4. the processing method according to claim 1 for improving aluminum alloy plate materials deep drawability, it is characterised in that the punch-pin
Outer rim be circular, square or pentagon.
5. the processing method of the raising aluminum alloy plate materials deep drawability according to claim any one of 1-4, it is characterised in that
It is described to be stirred friction processing, specifically include：
Friction processing is stirred using the stirring-head with mixing needle and the shaft shoulder, and the stirring face of the shaft shoulder is rounded.
6. the processing method according to claim 5 for improving aluminum alloy plate materials deep drawability, it is characterised in that the shaft shoulder
Diameter be more than the punch-pin outer rim at rounding arc length.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108823516A (en) * | 2018-07-10 | 2018-11-16 | 广东省材料与加工研究所 | A kind of method of needle-shaped Fe-riched phase form in improvement aluminium alloy |
| CN109940259A (en) * | 2019-02-02 | 2019-06-28 | 中铝材料应用研究院有限公司 | A method of improving aluminum alloy plate materials bending and forming |
| CN109967580A (en) * | 2019-03-22 | 2019-07-05 | 哈尔滨工业大学 | A kind of bilayer synchronous friction Hubbing method in situ increasing hole wall thickness |
| CN111663089A (en) * | 2020-05-15 | 2020-09-15 | 江苏理工学院 | Treatment method for improving surface strength of Al-Mg alloy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK542479A (en) * | 1978-12-20 | 1980-06-21 | Schmalbach Lubeca | DO PROCEDURE FOR MAKING METAL SURFACES AND OR METAL OXY SURFACES HYDROFILE |
| JPS5623323A (en) * | 1979-08-06 | 1981-03-05 | Toshiba Corp | Press forming method of metal plate material |
| SU1015972A1 (en) * | 1981-01-14 | 1983-05-07 | Предприятие П/Я А-1450 | Apparatus for hydromechanical cutting |
| CN1623763A (en) * | 2003-08-12 | 2005-06-08 | 波音公司 | Stir forming apparatus and method |
| CN104985393A (en) * | 2015-06-10 | 2015-10-21 | 东北大学 | Manufacturing method capable of improving mechanical performance of thick 7050-T7451 aluminum alloy plate |
-
2017
- 2017-06-16 CN CN201710458213.2A patent/CN107214231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK542479A (en) * | 1978-12-20 | 1980-06-21 | Schmalbach Lubeca | DO PROCEDURE FOR MAKING METAL SURFACES AND OR METAL OXY SURFACES HYDROFILE |
| JPS5623323A (en) * | 1979-08-06 | 1981-03-05 | Toshiba Corp | Press forming method of metal plate material |
| SU1015972A1 (en) * | 1981-01-14 | 1983-05-07 | Предприятие П/Я А-1450 | Apparatus for hydromechanical cutting |
| CN1623763A (en) * | 2003-08-12 | 2005-06-08 | 波音公司 | Stir forming apparatus and method |
| CN104985393A (en) * | 2015-06-10 | 2015-10-21 | 东北大学 | Manufacturing method capable of improving mechanical performance of thick 7050-T7451 aluminum alloy plate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108823516A (en) * | 2018-07-10 | 2018-11-16 | 广东省材料与加工研究所 | A kind of method of needle-shaped Fe-riched phase form in improvement aluminium alloy |
| CN108823516B (en) * | 2018-07-10 | 2020-01-17 | 广东省材料与加工研究所 | Method for improving needle-shaped iron-rich phase form in aluminum alloy |
| CN109940259A (en) * | 2019-02-02 | 2019-06-28 | 中铝材料应用研究院有限公司 | A method of improving aluminum alloy plate materials bending and forming |
| CN109967580A (en) * | 2019-03-22 | 2019-07-05 | 哈尔滨工业大学 | A kind of bilayer synchronous friction Hubbing method in situ increasing hole wall thickness |
| CN109967580B (en) * | 2019-03-22 | 2020-05-12 | 哈尔滨工业大学 | Double-layer synchronous friction drawing method for increasing wall thickness of hole in situ |
| CN111663089A (en) * | 2020-05-15 | 2020-09-15 | 江苏理工学院 | Treatment method for improving surface strength of Al-Mg alloy |
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