CN208083458U - A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) - Google Patents
A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) Download PDFInfo
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- CN208083458U CN208083458U CN201820590367.7U CN201820590367U CN208083458U CN 208083458 U CN208083458 U CN 208083458U CN 201820590367 U CN201820590367 U CN 201820590367U CN 208083458 U CN208083458 U CN 208083458U
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Abstract
The utility model belongs to powder metallurgy formation apparatus field, and in particular to a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM).The building mortion of the large-size ultra-thin powder metallurgy functionally gradient material (FGM) includes pre-compaction forming system and lamination powdering formation system, and the lamination powdering formation system is made of mold seaming chuck, die sleeve, mold push-down head, the high instrument lifting platform of spiral control, the high instrument platform of spiral control, spiral knob, lifting screw and the high instrument pedestal of control；Lamination powdering formation system in the utility model organically combines spiral altitude meter and die forming, realize the lamination powdering of falling head in the micron-scale, ensure the laying uniformity of every layer of powder, and the preparation that different sample sizes may be implemented and shape green body is replaced at any time using mold.The utility model realizes in PM technique that multiple layer powder is laid with and prefabricated forming is integrated with finally shaping, and press formability is good, and each layer thickness controls precisely.
Description
Technical field
The utility model belongs to powder metallurgy formation apparatus field, and in particular to a kind of large-size ultra-thin powder metallurgy gradient
The building mortion of material.
Background technology
The competition of modern high technology is largely dependent upon the development of material science.To material, especially to high property
The level of understanding, grasp and the application power of energy material, directly embody national scientific and technological level and economic strength and one
The mark of national overall national strength and civilization and progress speed.Therefore, the exploitation Yu research of new material are the guides of material science development.
Functionally gradient material (FGM) is 21 century most promising one of new material, once the broad interest for occurring causing countries in the world and
Concern.Changed according to different graded properties, functionally graded material can be divided into Density Funtion Gradient Materials, ingredient functionally gradient material
Material, optical function functionally gradient material (FGM) and fine functionally graded material etc..According to different application fields, functionally gradient material (FGM) can be divided into heat-resisting
Functionally gradient material (FGM), gradient biomaterial, chemical engineering functionally gradient material (FGM) and electronic engineering functionally gradient material (FGM) etc..
According to the component distributing of functionally gradient material (FGM) green compact, powder forming mainly has die forming, thin slice cascading into shape, wet
The multiple technologies such as method spray formation.During domestic and international correlative study person prepares functionally gradient material (FGM) using die forming, pile of grounds
Lamination number limited (for laboratory process at most up to 10 layers, industrial production is then no more than 3 layers), thickness in monolayer are larger (usually>
1mm), the size (sectional area of the serious limitation material of limited pressurization<100cm2)；Obtained by the forming of powder metallurgy stack of sheets
The most thin about 1mm of the thickness of green compact thin slice, but to powder characteristics, powder preparation, powder forming and the requirement of corresponding corollary equipment
It is higher.
In conclusion existing forming technique and device have various limitations, there is presently no mature and stable
Integral forming device realize the gradient body formation of large-size ultra-thin sample, and the development of modernization industrial technology is to ladder
The gradient distribution of degree material and size propose the tightened up requirement of higher, therefore, design and to develop a kind of novel large scale super
The building mortion of thin powder metallurgy functionally gradient material (FGM) is most important to the application field for widening functionally gradient material (FGM).
Utility model content
In order to capture in existing functionally gradient material (FGM) forming process the art walls such as thickness in monolayer is blocked up, functionally gradient material (FGM) is size-constrained
It builds, the utility model proposes a kind of building mortions of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM), improve existing gradient
The binding performance of each interlayer of material plank realizes whole metallurgical bindings using powder metallurgy, breaks through the gradient number of plies and gradient distribution
The limitation of mode.It is proposed that the forming integrated mentality of designing of powdering realizes the uniform mesh of cloth powder based on existing the relevant technologies
Mark controls the adjustable height of die head in combination with the high instrument precision of spiral control, and the novel-section of ultra-thin gradient distribution may be implemented
The forming of the large scale material powder metallurgy green body of material.Effective metallurgical binding between layers may be implemented using the device,
Gradient distribution is controllable, and the functionally gradient material (FGM) being prepared meets ultra-thin large-sized performance requirement of specific area, device operation
Simply, effectively save cost of investment.
A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；The large-size ultra-thin powder
The building mortion of metallurgical functionally gradient material (FGM) includes pre-compaction forming system (1) and lamination powdering formation system (2), the lamination powdering at
Shape system (2) is high by mold seaming chuck (7), die sleeve (9), mold push-down head (10), the high instrument lifting platform (11) of spiral control, spiral control
Instrument platform (12), spiral knob (13), lifting screw (14) and high instrument pedestal (15) composition of control；
The pre-compaction forming system (1) provides downward pressure；
After assembling, high instrument lifting platform (11) upper surface of spiral control and mold push-down head (10) flat contact；Spiral control
High instrument lifting platform (11) lower surface is connected with lifting screw (14), side wall and the spiral control Gao Yi of the high instrument lifting platform (11) of spiral control
The lumen contact of platform (12) or there are the gaps less than 100 microns, and there are spirals for the inner cavity of the high instrument platform (12) of spiral control
Control the space that high instrument lifting platform (11) moves up and down；There are the high instrument lifting platforms (11) of spiral control to move up and down for the inner cavity of die sleeve (9)
Space；After the high instrument lifting platform (11) of the spiral control enters die sleeve (9), the side wall and mould of the high instrument lifting platform (11) of spiral control
It covers the lumen contact of (9) or there are the gaps less than 100 microns；(i.e.：After assembling, on the high instrument lifting platform (11) of spiral control
Surface and mold push-down head (10) flat contact；High instrument lifting platform (11) lower surface of spiral control is connected with lifting screw (14), spiral shell
The side wall of high instrument lifting platform (11) and the lumen contact of the high instrument platform (12) of spiral control are controlled in rotation or there are between less than 100 microns
Gap, and the high instrument lifting platform (11) of spiral control is only capable of moving up and down in the inner cavity of the high instrument platform (12) of spiral control；The spiral control
After high instrument lifting platform (11) enters die sleeve (9), the side wall of the high instrument lifting platform (11) of spiral control and the lumen contact of die sleeve (9) or stay
There is the gap less than 100 microns, and the high instrument lifting platform (11) of spiral control can be only capable of moving up and down in the interior intracavitary of die sleeve (9)；)
After die sleeve (9) level is crosscutting, the area of gained die sleeve (9) lumenal cross-section is more than or equal to 10000mm2.It is excellent
It is selected as being more than or equal to 200cm2, further preferably 200-314cm2.After cross section is more than or equal to 314 square centimeters, compacting is single
When the ultra-thin preformed compact of layer, yield rate drastically declines.It is unfavorable for producing.Correspondingly-sized can be prepared in corresponding die size
Gradient shapes green body.
A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；The large-size ultra-thin powder
The building mortion of metallurgical functionally gradient material (FGM) further includes final compression moulding system (6), and transferring system is by motor (3) and crawler belt (4) group
At；Final compression moulding system (6) includes final shaping operation platform (5)；
After assembling, the upper surface of final shaping operation platform (5), crawler belt (4), die sleeve (9) lower surface be located at same water
Plane.
A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；Pre-compaction forming system (1) is adopted
With numerical control oil hydraulic system, in ± 5MPa, pressure head range is for press ranging from 100MPa-500MPa and pressure precision
200mm。
Lamination powdering formation system (2), can be by die head by spiral altitude meter and the integrated combination of moulding apparatus
Adjustable height control in 50 μm of magnitude, and can ensure using scraper plate the laying uniformity of every layer of powder.
Laying of the single layer powder in 200 ± 10 μm of precision may be implemented in lamination powdering formation system, and can pass through control
Adjustable height processed realizes that multi-level many body system powder is laid with.
Final compression moulding system (6) uses numerical control oil hydraulic system, can the accurate control within the scope of 200MPa-800MPa
Forming pressure, precision is in ± 5Mpa, pressure head range 500mm.
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, the processing at each position
Unit can carry out the large-size ultra-thin of scientific research or industrial required multilayer number, Arbitrary Gradient distribution by multigroup collaborative work
The preparation of powder metallurgy functionally gradient material (FGM).
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, the high instrument lifting of spiral control
The area equation of the area and mold push-down head (10) horizontal plane of platform (11) horizontal plane.
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, the high instrument lifting of spiral control
The area of platform (11) horizontal plane is less than or equal to the area of the horizontal crosscutting rear gained cross section in die sleeve (9) inner cavity.
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, the high instrument lifting of spiral control
The area of platform (11) horizontal plane is 10000-35000mm2.Preferably 11000-31400mm2。
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, die sleeve (9) inner cavity water
The area of flat crosscutting rear gained cross section is 10000-35000mm2.Preferably 11000-31400mm2。
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, mold seaming chuck (7)
The area of horizontal plane is equal to the area of mold push-down head (10) horizontal plane.
A kind of building mortion of novel large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, mold seaming chuck (7)
The area of horizontal plane is 10000-35000mm2.Preferably 11000-31400mm2。
The utility model devises the high instrument lifting platform (11) of independent spiral control for the first time.Rely on the high instrument lifting platform of spiral control
(11) and the control for accurately adding powder amount may be implemented in die sleeve (9), while the high instrument lifting platform of spiral control is utilized after each precompressed
(11) slow is slowly increased to be located in same level at the top of die sleeve (9) when time pre- laminated flake, then reduces as far as possible
When the probability of secondary precompressed sheet tears.This to obtain large scale, ultra-thin, Multifunctional layered powder metallurgy functionally gradient material (FGM) provides necessity
Condition.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；Including following steps
Suddenly；
Step 1
Toward mold seaming chuck (7), die sleeve (9), mold push-down head releasing agent is coated on (10)；Assembly mold；After assembling；It is logical
Cross the height of spiral knob (13) the adjustment high instrument lifting platform (11) of spiral control so that the upper surface of mold push-down head (10) to die sleeve
(9) vertical range of horizontal plane where top is d1；The d1 is less than 1.5mm, is preferably less than equal to 1mm；
Step 2
It is laid with the first metal powder in the container that die sleeve (9) and mold push-down head (10) are constituted until the first metal powder
Whole container is filled up at end；Then it strikes off so that the upper surface of the upper edge for the first metal powder filled and die sleeve (9) is same
Horizontal position；
Step 3
Mold seaming chuck (7) is pushed by pre-compaction forming system (1)；So that mold seaming chuck (7) is with P1Pressure acts on
On the first metal powder filled；Obtain the first super thin metal preformed layer；Removal pre-compaction forming system (1) is applied on mold
The pressure of pressure head (7)；Then by spiral knob (13) so that the high instrument lifting platform (11) of spiral control rises and spiral control Gao Yisheng
Drop platform (11) heads on mold push-down head (10) and is moved up in the inner cavity of die sleeve (9), until the first super thin metal preformed layer with
The upper edge of die sleeve (9) is in same level；Mold seaming chuck (7) is removed at this time；Then spiral control Gao Yisheng is lowered again
Platform (11) drops；So that the vertical range of the first super thin metal preformed layer horizontal plane where at the top of die sleeve (9) is d2；The d2
Less than 1.5mm, it is preferably less than equal to 1mm；
Step 4
Releasing agent is coated toward mold seaming chuck (7)；In the container that die sleeve (9) and the first super thin metal preformed layer are constituted
The second metal powder is laid with until the second metal powder fills up whole container；Then it strikes off so that the second metal powder filled
The upper edge at end is with the upper surface of die sleeve (9) in the same horizontal position；
Step 5
Mold seaming chuck (7) is pushed by pre-compaction forming system (1)；So that mold seaming chuck (7) is with P2Pressure acts on
On the second metal powder filled；Obtain the second super thin metal preformed layer；Removal pre-compaction forming system (1) is applied on mold
The pressure of pressure head (7)；Then by spiral knob (13) so that the high instrument lifting platform (11) of spiral control rises and spiral control Gao Yisheng
Drop platform (11) heads on mold push-down head (10) and is moved up in the inner cavity of die sleeve (9), until the second super thin metal preformed layer with
The upper edge of die sleeve (9) is in same level；Mold seaming chuck (7) is removed at this time；Then spiral control Gao Yisheng is lowered again
Platform (11) drops；So that the vertical range of the second super thin metal preformed layer horizontal plane where at the top of die sleeve (9) is d3；The d3
Less than 1.5mm, it is preferably less than equal to 1mm；
Step 6
It is repeated in Step 4: step 5；N+1 metal powders are laid with until N+1 gold in N super thin metal preformed layers
Belong to powder and fills up whole container；Then it strikes off so that the upper surface of the upper edge and die sleeve (9) of the N+1 metal powders filled
In the same horizontal position；Then with PN+1Pressure compacting；Until obtaining the preformed compact of the setting number of plies and thickness；The N be more than etc.
In 2；
Wherein PN+1=P1(10~25) (N+1)；Wherein N is selected from 2,3,4 ... ..., any one integer in 9；And P1 is big
In equal to 250MPa；
Wherein dn is less than 1.5mm, is preferably less than equal to 1mm；The n is any one whole in 3,4,5,6,7,8,9,10
Number.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model, by Step 1:
Two, three, four, five, six synergistic effect, realization are preparing large-size ultra-thin powder metallurgy functionally gradient material (FGM).Solves the prior art
Or it is middle when preparing ultra-thin powder metallurgy functionally gradient material (FGM) there are oversized, then yield rate is extremely low or can not assign functional layer not
Foot.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；It is pre- obtained by step 6
Green compact is moved to together with die sleeve (9), mold push-down head (10) on crawler belt (4), and final shaping operation is delivered to through motor (3)
On platform (5), is finally suppressed in final shaping operation platform (5), then demould, obtain finished product；The thickness of the finished product
To be less than 3mm, and the surface area of arbitrary one side is more than or equal to 10000mm in finished product2。
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；The N be more than etc.
It is less than or equal to 9 in 5.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；N super thin metals
The thickness of preformed layer is 200-500 microns.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；It is with powder size
The pore-foaming agent that 8-15 μm of metal alloy powders and size distribution are 30-50 μm is raw material, according to different X values, according to metal
Alloy powder：Pore-foaming agent powder=X：The mode of (100-X) is equipped with the compound material powder of different systems and is uniformly mixed, and presses
Obtain the composite powder of different systems successively according to the ascending sequence of the value of X, number is the first metal powder, the second metal
Powder ... N metal powders, N+1 metal powders are sealed up for safekeeping spare；Wherein pore-foaming agent be selected from potassium sulfate, sodium chloride, urea,
At least one of hollow alumina ball, floating bead；The value range of the X is：50-100.In the utility model, in conjunction with powder
Dispensing setting and measure, further improve the yield rate of product.Especially improve the yield rate of large-size ultra-thin product.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；In final forming behaviour
It is 150-300MPa to make the pressing pressure that platform (5) is finally suppressed.
A kind of application of the building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) of the utility model；In final forming behaviour
Make platform (5) finally to be suppressed, then positive demoulding obtains the finished product of density gradient distribution；Finished product is through being sintered or sintering+leaching
Bubble has obtained the metal alloy of ultra-thin density gradient distribution.
The processing unit of the present apparatus can carry out scientific research or the required multilayer number of industry, arbitrary by multigroup collaborative work
The preparation of the large-size ultra-thin powder metallurgy functionally gradient material (FGM) of gradient distribution.
Advantage
One, device provided by the utility model passes through precision control die head adjustable height and precision of powder laying, success
The powder metallurgy functionally gradient material (FGM) forming green body of large-size ultra-thin is prepared；
Two, the utility model is successfully integrated with different forming press systems and powdering formation system, and shares a set of
Motion platform optimizes the former topology layout of powdered metallurgical material, reduces the operation cost of equipment；
Three, equipment operation provided by the utility model is simple, can meet scientific research or industrial production to functionally gradient material (FGM) at
The number of plies and the thickness in monolayer requirement of shape, are obviously improved working efficiency.
Four, the utility model be solve prior art preparation ultra-thin powder metallurgy functionally gradient material (FGM) there are the function numbers of plies it is too small,
The problems such as undersized or yield rate is low provides necessary condition.
Description of the drawings
Fig. 1 is building mortion principle schematic in the utility model.
Fig. 2 is lamination powdering formation system principle schematic.
In figure：1, pre-compaction forming system；2, lamination powdering formation system；3, motor is transmitted；4, steel band is transmitted；5, finally at
Shape operating platform；6, final compression moulding system；7, mold seaming chuck；8, different system powder；9, die sleeve；10, mold pushes
Head；11, the high instrument lifting platform of spiral control；12, the high instrument platform of spiral control；13, spiral knob；14, lifting screw；15, high instrument bottom is controlled
Seat.
Specific implementation mode
With reference to the accompanying drawings and detailed description, novel large-size ultra-thin powder metallurgy gradient a kind of to the utility model
The building mortion of material is further described.
The formation system includes pre-compaction forming system 1, real within the scope of 100MPa-500MPa using numerical control oil pressure cntrol
The forming pressure regulation and control of existing precision ± 5Mpa；Lamination powdering formation system 2, spiral altitude meter and existing moulding apparatus are integrated
Design can control precision of powder laying in 50 μm of magnitudes, while requiring to replace at any time according to the size of prepared exemplar and being molded external member；
The mold external member of pre-compaction forming can be transferred to final forming press systems completion base by steel band transferring system 3 by steadily sliding
The compacting of body；Final compression moulding system 6, using numerical control oil hydraulic system, realized within the scope of 200MPa-800MPa precision ±
The forming pressure of 5Mpa regulates and controls.
In embodiment and comparative example, releasing agent is by zinc stearate, sodium alginate mass ratio 1:1 composition；
Embodiment 1
Raw materials used powder is 2A12 of the size distribution in 20-45 μm of pure aluminium powder and granularity at 8-20 μm in the present embodiment
Raw material powder is dried 4 hours before forming, while being obtained according to raw material powder characteristic and correlative study early period by Al alloy powder
The pine dress ratio of different powder.
Step 1
Releasing agent is coated on toward mold seaming chuck 7, die sleeve 9, mold push-down head 10；Assembly mold；After assembling；Pass through spiral
Knob 13 adjusts the height of the high instrument lifting platform of spiral control 11 so that the upper surface of mold push-down head 10 to 9 top place water of die sleeve
The vertical range of plane is d1；The d1=0.25mm；
Step 2
It is laid with the first metal powder (pure aluminium powder) in the container that die sleeve 9 and mold push-down head 10 are constituted until the first gold medal
Belong to powder and fills up whole container；Then it strikes off so that the upper edge for the first metal powder filled is with the upper surface of die sleeve 9 same
One horizontal position；
Step 3
Mold seaming chuck 7 is pushed by pre-compaction forming system 1；So that mold seaming chuck 7 acts on institute with 250MPa pressure
On first metal powder of filling, pressurize 5s；Obtain the first super thin metal preformed layer；Removal pre-compaction forming system 1 is applied to mould
Has the pressure of seaming chuck 7；Then by spiral knob 13 so that the high instrument lifting platform 11 of spiral control rises and the high instrument of spiral control lifts
Platform 11 heads on mold push-down head 10 and is moved up in the inner cavity of die sleeve 9, until the first super thin metal preformed layer and die sleeve 9 is upper
Edge is in same level；Mold seaming chuck 7 is removed at this time；Then the high instrument lifting platform of spiral control 11 is lowered again；So that the
Vertical range of the one super thin metal preformed layer apart from horizontal plane where 9 top of die sleeve is d2；The d2 is equal to 0.2mm；
Step 4
Releasing agent is coated toward mold seaming chuck 7；It is laid in the container constituted toward die sleeve 9 and the first super thin metal preformed layer
Second metal powder (2A12 Al alloy powders) is until the second metal powder fills up whole container；Then it strikes off so that filled
The second metal powder upper edge and die sleeve 9 upper surface in the same horizontal position；
Step 5
Mold seaming chuck 7 is pushed by pre-compaction forming system 1；So that mold seaming chuck 7 acts on institute with 200MPa pressure
On second metal powder of filling, pressurize 5s；Obtain the second super thin metal preformed layer；Removal pre-compaction forming system 1 is applied to mould
Has the pressure of seaming chuck 7；Then by spiral knob 13 so that the high instrument lifting platform 11 of spiral control rises and the high instrument of spiral control lifts
Platform 11 heads on mold push-down head 10 and is moved up in the inner cavity of die sleeve 9, until the second super thin metal preformed layer and die sleeve 9 is upper
Edge is in same level；Mold seaming chuck 7 is removed at this time；Then the high instrument lifting platform of spiral control 11 is lowered again；So that the
Vertical range of the two super thin metal preformed layers apart from horizontal plane where 9 top of die sleeve is d3；The d3 is equal to 0.25mm；
Step 6
Releasing agent is coated toward mold seaming chuck 7；It is laid in the container constituted toward die sleeve 9 and the second super thin metal preformed layer
Third metal powder (pure aluminium powder) is until third metal powder fills up whole container；Then it strikes off so that the third filled
The upper edge of metal powder is with the upper surface of die sleeve 9 in the same horizontal position；
Mold seaming chuck 7 is pushed by pre-compaction forming system 1；So that mold seaming chuck 7 acts on institute with 220MPa pressure
On the third metal powder of filling, pressurize 5s；Obtain third super thin metal preformed layer；Removal pre-compaction forming system 1 is applied to mould
Has the pressure of seaming chuck 7；Then by spiral knob 13 so that the high instrument lifting platform 11 of spiral control rises and the high instrument of spiral control lifts
Platform 11 heads on mold push-down head 10 and is moved up in the inner cavity of die sleeve 9, until third super thin metal preformed layer and die sleeve 9 is upper
Edge is in same level；Mold seaming chuck 7 is removed at this time；Then the high instrument lifting platform of spiral control 11 is lowered again；Make mould
The ratio and die sleeve 9 of tool push-down head 10 are located in same level；Steel band transfer conveyer system motor 3 is opened, by die forming
External member is transferred to steel band 4, and die forming external member is sent to final shaping operation platform 5 using the steady transmission of steel band；It opens
Final formation system 6, is adjusted to 300MPa by forming pressure, suppresses and keep 20s；Then it is obtained using positive ejection technique pure
The forming green body of aluminium -2A12 aluminium alloys-three layers of fine aluminium gradient distribution, every layer of compacted thickness is in 0.1 ± 0.01mm, green body overall thickness
0.32mm.Forming green body is thin rounded flakes, radius 9cm.
Repeat embodiment 1；100 times；Yield rate is 93%.
Comparative example 1
Using existing circular die；It is by mold seaming chuck；Die sleeve；Mold push-down head and plummer are constituted；First it is laid with
Pure aluminium powder (dosage is consistent with the first metal preloading mound of compacting of embodiment 1), (pressure and the first metal of compacting of embodiment 1 are pre- for compacting
The pressure of laminate layer is consistent)；When deviating from mold seaming chuck, there are many places cracking situations for the thin metal layer；Lead to not carry out next
The operation of step.
Comparative example 2
Using existing circular die；It is by mold seaming chuck；Die sleeve；Mold push-down head and plummer are constituted；First it is laid with
One layer of pure aluminium powder (dosage is consistent with the first metal preloading mound of compacting of embodiment 1) is being laid with one layer of 2A12 Al alloy powder (dosage
It is consistent to suppress the second metal preloading mound with embodiment 1), being finally laid with one layer of pure aluminium powder, (dosage and embodiment 1 suppress third metal
Preloading mound is consistent) 5s is suppressed with 250MPa；Demoulding；It was found that there is the case where many places cracking in two surfaces up and down in product.
Embodiment 2
Powder pre-treating and ingredient are equipped with；It it is 30-50 μm by aluminum substrate powder and size distribution that granularity is 8-15 μm
Spherical sodium chloride powder is dried 4 hours in 80 DEG C of baking oven.According to Al alloy powder：Pore-foaming agent powder=X：(100-X's)
Mode is equipped with the compound material powder of different systems；2A12 powder and water-soluble pore creating material powder are matched according to different volumes score
Than (value of X is respectively 60,70,80,90 and 100), number A1-A5, then mixes 3h, batch mixing in three-dimensional material mixer respectively
Machine rotating speed 20r/min, then under vacuum environment take out seal up for safekeeping it is spare.
Step 1
Releasing agent is coated on toward mold seaming chuck 7, die sleeve 9, mold push-down head 10, and (zinc stearate+sodium alginate is compound de-
Mould agent (mass ratio 1:1))；Assembly mold；After assembling；The height of the high instrument lifting platform of spiral control 11 is adjusted by spiral knob 13,
So that the vertical range of horizontal plane is d1 where the upper surface of mold push-down head 10 to 9 top of die sleeve；The d1=0.20mm；
Step 2
It is laid with the first metal powder (A1) in the container that die sleeve 9 and mold push-down head 10 are constituted until the first metal powder
Whole container is filled up at end；Then it strikes off so that the upper edge for the first metal powder filled is with the upper surface of die sleeve 9 in same water
Prosposition is set；
Step 3
Mold seaming chuck 7 is pushed by pre-compaction forming system 1；So that mold seaming chuck 7 acts on institute with 250MPa pressure
On first metal powder of filling, pressurize 5s；Obtain the first super thin metal preformed layer；Removal pre-compaction forming system 1 is applied to mould
Has the pressure of seaming chuck 7；Then by spiral knob 13 so that the high instrument lifting platform 11 of spiral control rises and the high instrument of spiral control lifts
Platform 11 heads on mold push-down head 10 and is moved up in the inner cavity of die sleeve 9, until the first super thin metal preformed layer and die sleeve 9 is upper
Edge is in same level；Mold seaming chuck 7 is removed at this time；Then the high instrument lifting platform of spiral control 11 is lowered again；So that the
Vertical range of the one super thin metal preformed layer apart from horizontal plane where 9 top of die sleeve is d2；The d2 is equal to 0.20mm；
Step 4
Releasing agent is coated toward mold seaming chuck 7；It is laid in the container constituted toward die sleeve 9 and the first super thin metal preformed layer
Second metal powder (A2) is until the second metal powder fills up whole container；Then it strikes off so that the second metal powder filled
The upper edge at end is with the upper surface of die sleeve 9 in the same horizontal position；
Step 5
Mold seaming chuck 7 is pushed by pre-compaction forming system 1；So that mold seaming chuck 7 acts on institute with 240MPa pressure
On second metal powder of filling, pressurize 5s；Obtain the second super thin metal preformed layer；Removal pre-compaction forming system 1 is applied to mould
Has the pressure of seaming chuck 7；Then by spiral knob 13 so that the high instrument lifting platform 11 of spiral control rises and the high instrument of spiral control lifts
Platform 11 heads on mold push-down head 10 and is moved up in the inner cavity of die sleeve 9, until the second super thin metal preformed layer and die sleeve 9 is upper
Edge is in same level；Mold seaming chuck 7 is removed at this time；Then the high instrument lifting platform of spiral control 11 is lowered again；So that the
Vertical range of the two super thin metal preformed layers apart from horizontal plane where 9 top of die sleeve is d3；The d3 is equal to 0.20mm；
Step 6
Releasing agent is coated toward mold seaming chuck 7；It is laid in the container constituted toward die sleeve 9 and the second super thin metal preformed layer
Third metal powder (pure aluminium powder) is until third metal powder fills up whole container；Then it strikes off so that the third filled
The upper edge of metal powder is with the upper surface of die sleeve 9 in the same horizontal position；Mold seaming chuck 7 is pushed by pre-compaction forming system 1；
So that mold seaming chuck 7 is acted on 230MPa pressure on the second filled metal powder, pressurize 5s；Obtain the ultra-thin gold of third
Belong to preformed layer；Wherein d4=0.20mm, d5 are equal to 0.20mm.
It is repeated in step 4 and step 5, obtains the 4th and the 5th super thin metal preformed layer；
Mold seaming chuck 7 is removed at this time；Then the high instrument lifting platform of spiral control 11 is lowered again；So that the of mold push-down head 10
Than being located in same level with die sleeve 9；Steel band transfer conveyer system motor 3 is opened, die forming external member is transferred to steel band
4, die forming external member is sent to final shaping operation platform 5 using the steady transmission of steel band；Final formation system 6 is opened,
Forming pressure is adjusted to 300MPa, suppress and keeps 20s；Then different porosities distribution is obtained using positive ejection technique
The forming green body of five layers of density gradient distribution, every layer of compacted thickness is in 0.1 ± 0.01mm, green body overall thickness 0.56mm.Shape base
Body is thin rounded flakes, radius 10cm.
Repeat embodiment 1；100 times；Yield rate is 90%.
Further expand die size, finds after the area of die sleeve inner cavity level cross-sectionn is more than 320 square centimeters, production
The yield rate of product drastically declines, and when area is more than 500 square centimeters, success rate is less than 10%.
Claims (9)
1. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM)；It is characterized in that：The large-size ultra-thin powder
The building mortion of metallurgical functionally gradient material (FGM) includes pre-compaction forming system (1) and lamination powdering formation system (2), the lamination powdering at
Shape system (2) is high by mold seaming chuck (7), die sleeve (9), mold push-down head (10), the high instrument lifting platform (11) of spiral control, spiral control
Instrument platform (12), spiral knob (13), lifting screw (14) and high instrument pedestal (15) composition of control；
The pre-compaction forming system (1) provides downward pressure；
After assembling, high instrument lifting platform (11) upper surface of spiral control and mold push-down head (10) flat contact；Spiral control Gao Yi
Lifting platform (11) lower surface is connected with lifting screw (14), side wall and the high instrument platform of spiral control of the high instrument lifting platform (11) of spiral control
(12) lumen contact or there are the gap less than 100 microns, and that there are spiral controls for the inner cavity of the high instrument platform (12) of spiral control is high
The space that instrument lifting platform (11) moves up and down；There are the skies that the high instrument lifting platform (11) of spiral control moves up and down for the inner cavity of die sleeve (9)
Between；After the high instrument lifting platform (11) of the spiral control enters die sleeve (9), the side wall and die sleeve of the high instrument lifting platform (11) of spiral control
(9) lumen contact or there are the gaps less than 100 microns；
After die sleeve (9) level is crosscutting, the area of gained die sleeve (9) lumenal cross-section is more than 10000mm2。
2. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 1；It is characterized in that：
The building mortion of the large-size ultra-thin powder metallurgy functionally gradient material (FGM) further includes final compression moulding system (6), transferring system by
Motor (3) and crawler belt (4) composition；
After assembling, the upper surface of final shaping operation platform (5), crawler belt (4), die sleeve (9) lower surface be located at same level.
3. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 1；It is characterized in that：
Pre-compaction forming system (1) uses numerical control oil hydraulic system, press ranging from 100MPa-500MPa and pressure precision in ± 5MPa,
Pressure head range is 200mm.
4. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 1；It is characterized in that：
The area equation of the area and mold push-down head (10) horizontal plane of high instrument lifting platform (11) horizontal plane of spiral control.
5. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 4；It is characterized in that：
The area of high instrument lifting platform (11) horizontal plane of spiral control is less than or equal to the face of the horizontal crosscutting rear gained cross section in die sleeve (9) inner cavity
Product.
6. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 4；It is characterized in that：
The area of high instrument lifting platform (11) horizontal plane of spiral control is 10000-35000mm2。
7. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 5；It is characterized in that：
The area of the horizontal crosscutting rear gained cross section in die sleeve (9) inner cavity is 10000-35000mm2。
8. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 4；It is characterized in that：
The area of mold seaming chuck (7) horizontal plane is equal to the area of mold push-down head (10) horizontal plane.
9. a kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) according to claim 4；It is characterized in that：
The area of mold seaming chuck (7) horizontal plane is 10000-35000mm2。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326297A (en) * | 2018-04-24 | 2018-07-27 | 中南大学 | A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) and application |
| CN112264615A (en) * | 2020-10-13 | 2021-01-26 | 南京工程学院 | Powder paving device |
| CN115138840A (en) * | 2022-06-23 | 2022-10-04 | 上海兰石重工机械有限公司 | Powder forming method |
-
2018
- 2018-04-24 CN CN201820590367.7U patent/CN208083458U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326297A (en) * | 2018-04-24 | 2018-07-27 | 中南大学 | A kind of building mortion of large-size ultra-thin powder metallurgy functionally gradient material (FGM) and application |
| CN112264615A (en) * | 2020-10-13 | 2021-01-26 | 南京工程学院 | Powder paving device |
| CN115138840A (en) * | 2022-06-23 | 2022-10-04 | 上海兰石重工机械有限公司 | Powder forming method |
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