CN109848418A - A kind of vacuum hotpressing stove graphite jig and its filler release method - Google Patents
A kind of vacuum hotpressing stove graphite jig and its filler release method Download PDFInfo
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- CN109848418A CN109848418A CN201910114849.4A CN201910114849A CN109848418A CN 109848418 A CN109848418 A CN 109848418A CN 201910114849 A CN201910114849 A CN 201910114849A CN 109848418 A CN109848418 A CN 109848418A
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Abstract
The present invention relates to hot extrusion briquetting technique fields, disclose a kind of vacuum hotpressing stove graphite jig and its filler release method, the mold includes seaming chuck, mold core, neck bush, external bushing, gasket, external mold, push-down head, pedestal, mold core, neck bush, external bushing, external mold is successively nested, seaming chuck, gasket, push-down head is sandwiched between neck bush and external bushing from top to bottom, when hot pressing, external mold and pedestal clamping, hot pressing product is pressed between seaming chuck and push-down head and is separated by gasket, it is squeezed into neck bush by mold core to be formed, to compress hot pressing formed product by upper push-down head, it can be with hot-forming hollow shaped material by the mold and its filler release method, it is easy to demould, simplify process, to effectively reduce cost.
Description
Technical field
The present invention relates to vacuum hot pressing formation applied technical fields, more particularly to a kind of vacuum hotpressing stove graphite jig
And its filler release method.
Background technique
Vacuum hotpressing stove is mainly by furnace body, hot pressing die, heating system, heat preservation and temp measuring system, vacuum system, inflation system
The composition such as system, water-cooling system, control system, hydraulic system.Vacuum hotpressing stove is periodic operating, is widely used in hard conjunction
Gold, function ceramics, powder metallurgy, PVD target material, thermoelectric material, photoelectric material etc. are in high temperature, high vacuum (or protective atmosphere) condition
Lower progress hot pressed sintering processing, such as it is applied to crystalline ceramics, industrial ceramics metal and the alloy material being made of refractory metal
The vacuum-sintering of material and the high temperature sintering of ceramic material silicon carbide and silicon nitride.Powder or green compact be can also be used for lower than main
Heat treatment at a temperature of component fusing point, it is therefore intended that by intergranular metallurgical bonding to improve its mechanical performance.
The hot-forming product shape of production enterprise maturation is usually regular circle or rectangular solid at present, is matched
The graphite jig design comparison of set is simple, generally comprises push-down head, housing, gasket, bushing.If necessary to hot pressing special-shaped product
Usually first with traditional dies hot pressing circle or rectangular solid, rear road is using complicated machine-shaping process, producing efficiency
It is lower, energy consumption is high, waste of raw materials is larger, individual special special-shaped products are because the reasons such as material property may be difficult to produce.
Summary of the invention
The present invention proposes a kind of vacuum hotpressing stove graphite jig and its filler release method, can be with hot pressing by the mold
Form common hollow shaped product.Relative to part heterotypic material conventional method (again through honest and kind machine-shaping after hot pressing) and
The product that mold is done, the present invention can effectively reduce cost, shorten the production cycle.To achieve the goals above, the present invention is implemented
Example provides the following technical solutions:
The embodiment of the present invention proposes that a kind of vacuum hotpressing stove graphite jig, the mold include seaming chuck, mold core, liner
Set, external bushing, gasket, external mold, push-down head and pedestal, the mold core, neck bush, external bushing, external mold are successively nested from inside to outside,
The seaming chuck, gasket, push-down head are sandwiched between neck bush and external bushing from top to bottom, and the mold structure is that can be used for hot pressing
Form hollow shaped material.
Preferably, the neck bush and external bushing are respectively spliced by arch member more than two panels.
Preferably, the cross-sectional shape of the mold core is identical as the Internal periphery shape of the seaming chuck；The mold core
Taper is less than 10 °.
Preferably, the neck bush and external bushing are equipped with the uniformly distributed gas vent in space；The full-size of the gas vent is small
In the minimum dimension of workpiece raw material powder.
Preferably, the mold core is provided with mold core inner hole along short transverse, and the mold core inner hole is radially by internal opens outward
There is mold core through slot；The width of the mold core through slot is 0.01mm to 10mm.
Preferably, the pedestal is fixedly connected with vibration component, and the oscillation intensity and frequency of the vibration component are according to object
The characteristic of material adjusts and with molding process according to time change.
Preferably, the fit clearance between the mould inside component is 0.01-2mm.
The embodiment of the present invention also proposed a kind of filling method based on vacuum hotpressing stove graphite jig, including walk as follows
It is rapid:
Step 1) --- --- tooling prepares, and pedestal level is anchored on workbench, external mold is fixedly connected with the base
Formation base cavity；
Step 2) --- --- die cavity prepares, placed in the basic cavity external bushing, push-down head, neck bush, mold core and
Gasket forms the die cavity for accommodating product to be formed；
Step 3) --- --- equal cloth filler prepares corresponding amount according to parameters such as workpiece shapes, size, compression ratio, volumes
Raw material is uniformly injected into the die cavity, and another gasket is placed on the raw material, and filler is completed.
Preferably, vibration component is enabled in the step 3), the vibration component is fixedly connected with pedestal, the vibration
The oscillation intensity and frequency of component are adjusted according to the characteristic of material and with the process of filler according to time change.
The embodiment of the present invention also proposed a kind of release method based on vacuum hotpressing stove graphite jig, including walk as follows
It is rapid:
Step a) --- --- demoulding prepares, and adjustment atmosphere protection, temperature control, air pressure adjustment, pressure are defeated after hot pressing
The state of a control of equal relevant devices out, makes up to preset demoulding condition；
Step b) --- --- neck bush is removed, and releases pressure equipment to the pressure operation of seaming chuck and along the opposite direction of pressure
It removes, takes out the seaming chuck, generate the mold core and neck bush by the tooling with mold core inner hole and the cooperation of mold core through slot
Relative motion is mutually disengaged, and the mold core is taken out in one end big along the mold core diameter, radially stirs liner to mold center's axis
The component of set makes its each component separation, to take out each component；
Step c) --- --- external bushing is removed, and so that external bushing is generated relative motion with external mold and is mutually disengaged, along the external mold
The one end being relatively large in diameter by the external bushing together with workpiece and gasket together by being taken out in the external mold, remove external bushing and described
Gasket.
Preferably, the step a) further includes vibration component Attended Operation, the oscillation intensity and frequency of the vibration component
With the characteristic adjustment of finished product and during demoulding according to time change.
The embodiment of the present invention has the advantages that
First, the upper and lower pressure head of workpiece similar shape and for lifting workpieces quality and improve stripping result multilayer similar shape gasket
And multiple-piece bushing, so that the mold is applicable not only to the processing of the hot-forming workpiece of hollow profile, while being also applied for solid
Workpiece.
Second, pressure head design be conducive to different materials, thickness, deflection material workpiece shaping；Workpiece interface shape is by pressing
Head cross sectional shape determines, eliminates pressed machining processes, saves material, reduce costs, shorten the process-cycle.
Third, the present invention can be used cooperatively with all kinds of hot-forming, Equipments for Heating Processing, splintery, through slot and stomata design
It can effectively avoid crackle generation, while being easy to demould, simplify process, reduce cost.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Fig. 1 is a kind of mold assembly structure diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of seaming chuck structural schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of mold insert structure schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of liner structure schematic diagram provided in an embodiment of the present invention；
Fig. 5 is a kind of external bushing structural schematic diagram provided in an embodiment of the present invention；
Fig. 6 is a kind of gasket construction schematic diagram provided in an embodiment of the present invention；
Fig. 7 is a kind of cast outer mold structure schematic diagram provided in an embodiment of the present invention；
Fig. 8 is a kind of push-down head structural schematic diagram provided in an embodiment of the present invention；
Fig. 9 is a kind of schematic diagram of base structure provided in an embodiment of the present invention；
Figure 10 is the filler and demoulding flow chart of mold of the present invention；
Figure 11 is a kind of mould filler status diagram provided in an embodiment of the present invention；
Figure 12 is status diagram before a kind of demoulding provided in an embodiment of the present invention.
In figure: in figure: 1- seaming chuck, 2- mold core, 3- neck bush, 4- external bushing, 5- gasket, 6- hot pressing product, 7- external mold,
8- push-down head, 9- pedestal, 10- seaming chuck Internal periphery, 11- seaming chuck section, 12- seaming chuck outer profile, 13- mold core inner hole, 14-
Mandrel diameter, 15- through slot, 16- neck bush Internal periphery, 17- neck bush outer profile, 18- external bushing Internal periphery, outside 19- external bushing
Profile, 20- gasket section, 21- gasket Internal periphery, 22- gasket outer profile, 23- external mold outer diameter, 24- external mold Internal periphery, outside 25-
Mould lower end, 26- push-down head Internal periphery, 27- push-down head section, 28- push-down head outer profile, 29- pedestal outer diameter, 30- pedestal upper end,
31- pedestal lower end, 32- charging Hatch Opening
Specific embodiment
The term of cited such as "upper", "lower", "left", "right", " centre ", is merely convenient to describe in this specification
Be illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, and is changing technology without essence
It inside holds, when being also considered as the enforceable scope of the present invention.
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment is used for a kind of circular ring shape alloy target material of hot pressing, which includes seaming chuck 1, mould
Core 2, neck bush 3, external bushing 4, gasket 5, external mold 7, push-down head 8, pedestal 9.7 sets of external mold outside external bushing 4, neck bush 3 is outside
In bushing 4, seaming chuck 1, gasket 5 and push-down head 8 are equipped between neck bush 3 and external bushing 4 from top to bottom, hot pressing product 6 is pressed on
Separate between seaming chuck 1 and push-down head 8 and by gasket 5.Mold core 2 is in neck bush 3 and is equipped with taper, external mold 7, external bushing 4, interior
Bushing 3, seaming chuck 1, gasket 5, push-down head 8 and mold core 2 are placed in together on pedestal 9, by 7 outer profile lower end of external mold groove and
The boss inlay card of 9 outer profile upper end of pedestal cooperates.When hot pressing, hot pressing product 6 is pressed on seaming chuck 1 by external mold 7 and 9 clamping of pedestal
Separate between push-down head 8 and by gasket 5, squeezed into neck bush 3 by the mold core 2 with taper to be formed, thus by upper
Push-down head compresses hot pressing formed product.Specifically, as shown in figs. 2-9:
11 size of seaming chuck section is more preferably selected as D219*d151mm, in fact it is highly preferred that is 170mm.Seaming chuck outer profile
12 and 18 fit clearance of external bushing Internal periphery are preferably 0.3mm, seaming chuck Internal periphery 10 and 17 fit clearance of neck bush outer profile
Preferably 0.3mm.The transition pressure head step snap-in location of 11 hot pressing furnace body of seaming chuck upper end.
Mold core 2 is configured to hollow tubbiness, and highly preferred mold core 2 is 240mm, and mandrel diameter 14 is preferably 115mm, mold core 2
Taper is cooperated to be preferably 3 ° with neck bush 3,13 diameter of mold core inner hole is preferably 25mm, and the short transverse of mold core 2 opens a through slot
15,15 width of through slot is preferably 6mm.
Neck bush 3 is configured to the combination of circumferencial direction fFour piece type, and 3 height of neck bush is 240mm, neck bush Internal periphery 16 and mould
Core 2 cooperates, and neck bush outer profile 17 and seaming chuck 1, gasket 5, push-down head 8 cooperate, and fit clearance is preferably 0.3mm.
External bushing 4 is configured to the combination of circumferencial direction fFour piece type, and 4 height of external bushing is 240mm, external bushing outer profile 19 and outer
Mould 7 cooperates, and external bushing Internal periphery 18 and seaming chuck 1, gasket 5, push-down head 8 cooperate, and fit clearance is preferably 0.3mm.
20 size of gasket section is more preferably selected as D219*d151mm, and thickness is preferably 10mm.Gasket outer profile 22 and outer
18 fit clearance of bushing Internal periphery is preferably 0.3mm, and gasket Internal periphery 21 is preferably with 17 fit clearance of neck bush outer profile
0.3mm。
External mold outer diameter 23 is preferably 400mm, and highly preferred external mold is 240mm, and the biggish one end of external mold internal diameter is preferably
242mm, external mold Internal periphery 24 and external bushing 4 cooperate, and external mold lower end 25 is preferably that step is engaged with the positioning method of pedestal 9, outside
Step depth 20mm, the width 20mm of mould 7.
27 size of push-down head section is more preferably selected as D219*d151mm, and highly preferred push-down head is 60mm.Outside push-down head
Profile 28 and 18 fit clearance of external bushing Internal periphery are preferably 0.3mm, and push-down head Internal periphery 26 and neck bush outer profile 17 cooperate
Gap is preferably 0.3mm.
Pedestal outer diameter 29 is preferably 400mm, and substructure height is preferably 60mm, the positioning method of pedestal upper end 30 and external mold 7
Preferably step is engaged, and pedestal lower end 31 is preferably that plane is bonded with the positioning method of hot pressing furnace body, and hot pressing furnace is stretched out in outer
Bottom plummer 30mm.
Specification after mold assembly is D400*410mm, and the annular target of hot pressing is having a size of D200*d150*20mm, hot pressing
Pressure is about 40MPa, and 1300 DEG C of temperature.
The inside and outside bushing can obtain the gas vent uniformly distributed with space, the row after using special forming process
The full-size of stomata is less than the minimum dimension of workpiece raw material powder；Using aperture vents hole, block count by
The shape in section 11 determines, guarantees that the contour line of each piecemeal at most only includes an inflection point, to ensure the convenience demoulded；This
When, the size of mold core outer profile is limited by neck bush inside dimension, and mold core outer profile and neck bush Internal periphery keep 0.01mm or more
The gap below 2mm.
Figure 10 is the filler and demoulding flow chart of mold of the present invention, suitable for annular workpieces and solid workpiece plus
Work；For present invention embodiment as shown in Figure 1, specific filler and demoulding step are as follows.
After mold enters filler process: progress tooling preparation first, according to 6 cross sectional shape of product to be formed, hot pressing material
The correlative factors such as material, hot pressing temperature change curve, the molding number of plies confirm seaming chuck 1, mold core 2, neck bush 3, external bushing 4, gasket
5, external mold 7, push-down head 8, pedestal 9 and related auxiliary mould are complete；Ensure that raw material to be formed and ancillary equipment are in place；Ensure described
9 level of pedestal is anchored on workbench, it is ensured that external mold 7 is fixedly connected with formation base cavity with pedestal 9.
Die cavity preparation is carried out, checks and ensures that 9 level of pedestal is anchored on workbench, external mold 7 is fixedly connected with pedestal 9；
External bushing 4, push-down head 8, neck bush 3, mold core 2 and gasket 5 are placed in the basic cavity, is formed for accommodating production to be formed
The die cavity of product 6, top are long and narrow cyclic annular charging Hatch Opening 32.
And then, equal cloth filler operation is completed, according to parameters such as workpiece shapes, size, compression ratio, volumes, prepares to correspond to
It is uniformly laid in the die cavity by the cyclic annular Hatch Opening 32 that feeds, gasket 5 is placed on the raw material by the raw material of amount, complete
At filler.
In filler journey, the vibration component being fixedly connected with pedestal 9, oscillation intensity and frequency root can be started as needed
It is automatically controlled according to the characteristic adjustment of material by the microprocessor program of peripheral equipment.
After hot pressing according to the technological requirements, the phases such as atmosphere protection, temperature control, air pressure adjustment, pressure output are adjusted
The state of a control of equipment is closed, until reaching preset demoulding condition.
Then the dismounting of neck bush or external bushing is carried out, but the dismounting order of inner-outer sleeve can be flexibly true according to the actual situation
It is fixed；As mold core 2 diameter close to external mold 7 diameter or be relatively large in diameter, then first remove neck bush 3；Conversely, if 2 diameter of mold core compared with
External mold 7 is small or mold core diameter is smaller, then can first remove external bushing 4.
The specific method that neck bush 3 is removed is: releasing pressure equipment to the pressure operation of seaming chuck 1 and along the negative side of pressure
To removing, seaming chuck 1 is taken out, generates mold core 2 and neck bush 3 by the tooling with mold core inner hole 13 and the cooperation of mold core through slot 15
Relative motion is mutually disengaged, and takes out mold core 2 along the big one end of 2 diameter of mold core；After mold core takes out, radially dialled to mold center's axis
Each arch member of neck bush 3 as shown in Figure 4 is moved, and takes out each component, neck bush 3 is removed.
The specific method that external bushing 4 is removed is: mutually de- after so that external bushing 4 and external mold 7 is generated relative motion by external force
From, along one end that external mold 7 is relatively large in diameter by external bushing 4 together with workpiece and gasket 5 etc. together by being taken out in external mold 7, remove outer lining
Four arch members and gasket 5 of such as Fig. 5 of set 4, complete the dismounting of external bushing.
Before progress stripping operation or during demoulding, the vibration dress automatically controlled by peripheral hardware can star as needed
It sets, improves stripping result；The intensity and frequency of the vibration are adapted to the characteristic of different finished products with the characteristic of finished product.
It should be noted that above-mentioned steps can realize automatic operation by cooperation peripheral equipment and control mechanism, into one
Step embodies applicability and scalability of the invention, also meets live disassembling operations for manual operations and is accustomed to, convenience is strong, suitable
With wide.
Figure 11 be a kind of removal seaming chuck status diagram provided in an embodiment of the present invention, wherein charging Hatch Opening 32 and at
Type workpiece interface is identical, for guarantee raw material be added after mold be evenly distributed, height it is equal, the present invention is by mechanical vibration member and mould
Tool is fixedly connected, and realizes being uniformly distributed for raw material by adjusting oscillation intensity and frequency.
Figure 12 is status diagram before a kind of demoulding provided in an embodiment of the present invention；When mold is extensive by the temperature of hot press period
It answers to after room temperature condition, since shaping workpiece and mold generally have the different coefficients of expansion, workpiece and each component of mold are herein
Opposite sliding occurs in the process, so that knockout course easily facilitates operation.
In addition, the interior external bushing of mold taper and the multiple-piece combination rationally designed is also further such that the process of demoulding
It is more smooth, surface treated each components of mold, so that mold is further reduced the pollution of finished work-piece.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (10)
1. a kind of vacuum hotpressing stove graphite jig, it is characterised in that: the mold includes seaming chuck (1), mold core (2), liner
Cover (3), external bushing (4), gasket (5), external mold (7), push-down head (8), pedestal (9), the mold core (2), neck bush (3), outer lining
It is successively nested from inside to outside to cover (4), external mold (7), the seaming chuck (1), gasket (5), push-down head (8) are sandwiched in liner from top to bottom
It covers between (3) and external bushing (4), the mold structure is that can be used for hot-forming hollow shaped material.
2. mold as described in claim 1, it is characterised in that: the neck bush (3) and external bushing (4) respectively by two panels more than
Arch member is spliced.
3. mold as described in claim 1, it is characterised in that: the cross-sectional shape of the mold core (2) and the seaming chuck (1)
Internal periphery shape it is identical；The taper of the mold core (2) is less than 10 °.
4. mold as described in any one of claims 1 to 3, it is characterised in that: the neck bush (3) and external bushing (4) are equipped with
The uniformly distributed gas vent in space；The full-size of the gas vent is less than the minimum dimension of workpiece raw material powder.
5. mold as described in any one of claims 1 to 3, it is characterised in that: the mold core (2) is provided with mold core along short transverse
Inner hole (13), the mold core inner hole (13) are radially provided with mold core through slot (15) outward by inside；The mold core through slot (15)
Width is 0.01mm to 10mm.
6. mold as described in any one of claims 1 to 3, it is characterised in that: the pedestal (9) and the fixed company of vibration component
It connects, the oscillation intensity and frequency of the vibration component are adjusted according to the characteristic of material and with molding process according to time change.
7. a kind of filling method based on any one of claim 1 to 5 mold, it is characterised in that include the following steps:
Step 1) --- --- tooling prepares, and pedestal (9) level is anchored on workbench, and external mold (7) and the pedestal (9) are fixed
Connect and compose basic cavity；
Step 2) --- --- die cavity prepares, and places external bushing (4), push-down head (8), neck bush (3), mould in the basic cavity
Core (2) and gasket (5), form the die cavity for accommodating product to be formed (6)；
Step 3) --- --- equal cloth filler prepares the original of corresponding amount according to parameters such as workpiece shapes, size, compression ratio, volumes
Material, is uniformly injected into the die cavity, another gasket (5) is placed on the raw material, and filler is completed.
8. filling method as claimed in claim 7, it is characterised in that: enable vibration component, the vibration in the step 3)
Dynamic component is fixedly connected with pedestal (9), and the oscillation intensity and frequency of the vibration component adjust according to the characteristic of material and with filling out
The process of material is according to time change.
9. a kind of release method based on any one of claim 1 to 5 mold, it is characterised in that include the following steps:
Step a) --- --- demoulding prepares, and atmosphere protection, temperature control, air pressure adjustment, pressure output etc. are adjusted after hot pressing
The state of a control of relevant device makes up to preset demoulding condition；
Step b) --- --- neck bush is removed, and releases pressure equipment to the pressure operation of seaming chuck (1) and along the opposite direction of pressure
It removes, takes out the seaming chuck (1), make the mold core by the tooling with mold core inner hole (13) and mold core through slot (15) cooperation
(2) relative motion being generated with neck bush (3) to be mutually disengaged, the mold core (2) is taken out in one end big along the mold core (2) diameter,
The component for radially stirring neck bush (3) to mold center's axis makes its each component separation, to take out each component；
Step c) --- --- external bushing is removed, and so that external bushing (4) is generated relative motion with external mold (7) and is mutually disengaged, along described outer
One end that mould (7) is relatively large in diameter takes out the external bushing (4) together with workpiece and gasket (5) by the external mold (7) is middle together, tears open
Except external bushing (4) and the gasket (5).
10. release method as claimed in claim 9, it is characterised in that: the step a) further includes vibration component Attended Operation,
The oscillation intensity and frequency of the vibration component are with the characteristic adjustment of finished product and during demoulding according to time change.
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| CN111333418A (en) * | 2020-04-21 | 2020-06-26 | 包头稀土研究院 | Special sintering container for ceramic, application and preparation method of ceramic |
| CN113172229A (en) * | 2021-04-08 | 2021-07-27 | 南京智田机电有限责任公司 | Preparation method of composite integral bushing for double-screw extruder |
| CN113172225A (en) * | 2021-04-08 | 2021-07-27 | 南京智田机电有限责任公司 | Double-screw integral alloy bushing and preparation method thereof |
| CN114799176A (en) * | 2022-04-11 | 2022-07-29 | 中国地质科学院探矿工艺研究所 | Die for pressureless sintering diamond reamer of intermediate frequency furnace |
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