CN107498038A - Multicarity pressureless sintering graphite jig - Google Patents
Multicarity pressureless sintering graphite jig Download PDFInfo
- Publication number
- CN107498038A CN107498038A CN201710678143.1A CN201710678143A CN107498038A CN 107498038 A CN107498038 A CN 107498038A CN 201710678143 A CN201710678143 A CN 201710678143A CN 107498038 A CN107498038 A CN 107498038A
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- China
- Prior art keywords
- graphite
- sleeve
- drift
- cavity
- multicarity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/24—Unitary mould structures with a plurality of moulding spaces, e.g. moulds divided into multiple moulding spaces by integratable partitions, mould part structures providing a number of moulding spaces in mutual co-operation
Abstract
The invention discloses a kind of graphite jig of Multicarity pressureless sintering, including graphite sleeve, upper and lower graphite drift and precompressed pressure head, the graphite sleeve is the hollow cylinder of Multicarity, the thermometer hole of a radial direction is provided with the outer wall of graphite sleeve, the graphite drift up and down is the entirety connected into by cylinder ring flange and truncated cone projection bar, and the precompressed pressure head is the entirety connected into by cylinder ring flange and cylinder projection bar.The present invention can disposably sinter batch samples, improve production efficiency, save the energy, meet requirement prepared by high flux material.The present invention can also realize that the batch samples once obtained realize complete differentiation, disposably obtain the sample under different temperatures, convenient to carry out every sign and quantitative measurement.
Description
Technical field
The present invention relates to pressureless sintering apparatus field, and in particular to the graphite jig of discharge plasma pressureless sintering.
Background technology
Discharge plasma sintering technique (Spark Plasma Sintering, SPS) is that one kind utilizes on-off DC pulse
The new Fast Sintering method of electric current direct-electrifying sintering, there is homogeneous heating, quick heating, sintering time is short, temperature is low, production effect
The advantages such as rate height, product tissue fine uniform, it can keep the nature of raw material, can obtain the material of high-compactness,
Functionally gradient material (FGM) and complex part can be sintered.
High flux synthesis is the forefront problem of material science, and its core is the efficient materials synthesis side of development high flux
Method, technology and equipment, explore a major challenge and opportunity that high flux synthesis is materials science field.
Being sintered mostly using plasma discharging technology at present has pressure to sinter.And mould used in existing pressureless sintering
Tool, including the sleeve 1 of hollow cylinder and two graphite drifts 2 (upper graphite accent 21 and lower graphite drift 22), side wall is set
It is material to be sintered to have thermometer hole 4,8.As shown in Figure 1.Disposable batch samples can not be realized using existing sintering mold
Synthesis and sintering, low yield, waste the energy, also can not disposably obtain a variety of sintered samples, realize high flux pressureless sintering
It is particularly important.
The content of the invention
The invention provides a kind of graphite jig of Multicarity pressureless sintering, can meet wanting for high flux material preparation
Ask, it is also proposed that a kind of agglomerated material characterizes and the new approaches of performance test.
To realize above-mentioned technical purpose, the invention provides a kind of graphite jig of Multicarity pressureless sintering, including graphite
Sleeve, upper graphite drift, lower graphite drift and precompressed pressure head, the thermometer hole of radial direction is provided with the outer wall of graphite sleeve；It is described
Upper graphite drift is identical with lower graphite punch structure, and the upper graphite drift and lower graphite drift are oppositely arranged and be respectively arranged at
The upper and lower ends of the graphite sleeve, cylinder projection bar is located at the inside cavity of graphite sleeve and be encapsulated in cavity by material bed
Between；The precompressed pressure head is to be connected into by cylinder ring flange and the cylinder projection bar being arranged on cylinder ring flange
One entirety, the height of cylinder projection bar is identical with sleeve height, wherein：
The graphite sleeve is the hollow cylinder of Multicarity；
The upper graphite drift and lower graphite drift are by cylindrical flange disk and are arranged on cylindrical flange disk
Some truncated cone projection bar compositions, each truncated cone projection bar and the diameter of section of ring flange connecting side are less than away from flange
The diameter of disk side；The truncated cone projection bar is centrosymmetric on the surface of cylindrical flange disk setting or irregular to be set
Put, fluted, diametric(al) of the groove along cylindrical flange disk and in the frustum of a cone is opened up on the surface of cylindrical flange disk
Disconnected at shape projection bar, the cylindrical flange panel surface being centrosymmetric for truncated cone projection bar opens up more than two recessed
Groove, the groove of one or more is opened up for the cylindrical flange panel surface of the irregular setting of raised bar；
The quantity and position, the cylinder of precompressed pressure head of the truncated cone projection bar of the upper graphite drift and lower graphite drift
The quantity of body projection bar and position are with setting the quantity of cavity and position corresponding in graphite sleeve.
The graphite sleeve being centrosymmetric preferably for cavity, the thermometer hole are located at the axial direction of graphite sleeve outer wall
Point midway, and be located at same straight line with a wherein cavity and bushing core；It is in the graphite of irregular setting for cavity
Sleeve, the thermometer hole are located at the axial point midway of graphite sleeve outer wall, with the cavity and set nearest from sleeve periphery
Cylinder is centrally located at same straight line.
Cavity inside graphite sleeve can arbitrarily be set, wherein preferably, the chamber set inside the graphite sleeve
When body is even number, each cavity is centrosymmetric on the central shaft of graphite sleeve；The cavity set inside graphite sleeve
For odd number when, one of cavity is located at the center of graphite sleeve, during remaining cavity is on the central shaft of graphite sleeve
The heart is symmetrical.
Preferably, the maximum gauge of the truncated cone projection bar of the upper graphite drift and lower graphite drift is less than or equal to stone
The cavity internal diameter of black sleeve.
The diameter of the cylindrical flange disk of the upper graphite drift and lower graphite drift is identical with the external diameter of sleeve.
When the upper graphite drift and lower graphite drift sinter, the circular cone of material bed and upper graphite drift and lower graphite drift
The height sum of platform shape projection bar is less than or equal to the height of sleeve.
The diameter of the cylinder projection bar of the precompressed pressure head is equal to the internal diameter of barrel bore body, the precompressed pressure head cylinder
The diameter of ring flange is equal to the external diameter of sleeve.
The graphite jig of Multicarity pressureless sintering is prepared by graphite.
Beneficial effect：Compared with prior art, the invention provides the mould of a variety of patterns, due to multiple cavities position point
Cloth is random, different so that each cavity programming rate and final temperature are different, so that once obtaining from the position in center
The batch samples obtained realize complete differentiation, so as to obtain the sample under different temperatures, can disposably carry out different samples
Items characterize and quantitative measurement.
Brief description of the drawings
Fig. 1 is the SPS pressureless sintering mould schematic diagrames of prior art；
Fig. 2 is a kind of schematic diagram of embodiment of Multicarity pressureless sintering mould；
Fig. 3 is the schematic diagram of second of embodiment of Multicarity pressureless sintering mould；
Fig. 4 is the schematic diagram of the third embodiment of Multicarity pressureless sintering mould；
Fig. 5 is a kind of schematic diagram (the graphite drift with Fig. 1 of embodiment of Multicarity pressureless sintering mould prepressing device
It is corresponding)；
Fig. 6 is that the schematic diagram of second of embodiment of Multicarity pressureless sintering mould prepressing device (rushes with Fig. 2 graphite
Head is corresponding)；
Fig. 7 is graphite drift schematic diagram；
Wherein：1- graphite sleeves；2- graphite drifts；The upper graphite drifts of 21-；Graphite drift under 22-；3- precompressed pressure heads；4-
Thermometer hole；5- cylinder ring flanges；6- truncated cone projection bars；7- grooves；8- is material bed；9- cylinder projection bars.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, for the sake of clarity, each in accompanying drawing
Individual part is not necessarily to scale.
The invention provides a kind of graphite jig of Multicarity pressureless sintering, whole mould is prepared by graphite, bag
Graphite sleeve 1, upper graphite drift 21, lower graphite drift 22 and precompressed pressure head 3 are included, radial direction is provided with the outer wall of graphite sleeve
Thermometer hole 4, graphite sleeve are the hollow cylinder of Multicarity, and upper graphite drift is identical with lower graphite punch structure, upper graphite punching
Head and lower graphite drift are oppositely arranged and are respectively arranged at the upper and lower ends of graphite sleeve, cylinder projection bar is located at graphite cannula
The inside cavity of cylinder is encapsulated in material bed 8 between cavity.
As shown in Figure 5 and Figure 6, precompressed pressure head 3 is by cylinder ring flange 5 and the cylinder being arranged on cylinder ring flange
The entirety that body projection bar 9 connects into, the height of cylinder projection bar are identical with sleeve height.
As shown in Fig. 2~Fig. 5, upper graphite drift and lower graphite drift are by cylindrical flange disk and are arranged at cylinder
Some truncated cone projection bars 6 on ring flange form, each truncated cone projection bar and the diameter of section of ring flange connecting side
Less than the diameter away from ring flange side；Truncated cone projection bar be centrosymmetric on the surface of cylindrical flange disk setting or nothing
Rule is set, and fluted, diametric(al) of the groove along cylindrical flange disk and in circular cone is opened up on the surface of cylindrical flange disk
Disconnected at platform shape projection bar, the cylindrical flange panel surface being centrosymmetric for truncated cone projection bar opens up more than two
Groove, the groove of one or more is opened up for the cylindrical flange panel surface of the irregular setting of raised bar；Upper graphite drift is with
The quantity of the truncated cone projection bar of graphite drift and position, precompressed pressure head cylinder projection bar quantity and position and graphite
Set the quantity of cavity and position corresponding in sleeve.
Wherein, the maximum gauge of the truncated cone projection bar of upper graphite drift and lower graphite drift is less than or equal to graphite sleeve
Cavity internal diameter.The diameter of the cylindrical flange disk of upper graphite drift and lower graphite drift is identical with the external diameter of sleeve.Upper graphite
When drift and lower graphite drift sinter, it is material bed with the height of upper graphite drift and the truncated cone projection bar of lower graphite drift it
With the height less than or equal to sleeve.The diameter of the cylinder projection bar of precompressed pressure head is equal to the internal diameter of barrel bore body, precompressed pressure
The diameter of headpin body ring flange is equal to the external diameter of sleeve.
The several embodiments of the present invention are specifically described below.
The graphite jig of the Multicarity pressureless sintering of the present embodiment is by taking four hole sintering molds as an example, as shown in Fig. 2 four logical
Vestibule body is on the Central Symmetry of graphite sleeve 1, and in another embodiment, graphite jig is five hole sintering molds, such as Fig. 3 institutes
Show, one of via cavities body is located at the center of sleeve 1, and remaining four through hole cavity is on the Central Symmetry of sleeve 1, still
It is contemplated that realizing requirement prepared by high flux material, multicarity mould is not limited only to four holes, diplopore, three holes, four holes, five
The mould of hole, six holes even more multi-through hole cavity is in scope of the present invention.In addition, in other embodiment, it is more
The through hole cavity position of cavity mold is randomly provided, and is distributed in graphite sleeve 1, as shown in Figure 4.
In a preferred embodiment, when the cavity set inside graphite sleeve is even number, each cavity closes
It is centrosymmetric in the central shaft of graphite sleeve, as shown in Figure 2；When the cavity set inside graphite sleeve is odd number, its
In a cavity be located at the center of graphite sleeve, remaining cavity is centrosymmetric on the central shaft of graphite sleeve, such as Fig. 3 institutes
Show.
The truncated cone projection bar 6 of graphite drift 2 and the cavity position of graphite sleeve 1 are corresponding in multicarity mould, keep away
The positioning of graphite jig in sintering process is exempted from.Multicarity mould can disposably carry out batch samples sintering, improve production
Efficiency, save time and the energy.Surveyed in addition, the multicarity mould shown in Fig. 2 and Fig. 3 can be additionally used in every characterize with physical property
Examination.Obvious material is distinguished as reference substance by the use of shape characteristic at different temperatures, is placed in multicarity mould shown in Fig. 4
Row sintering, the actual temp scope of each cavity is determined by pattern, it would be desirable to which the sample of test is placed in the multicarity mould
Row is sintered, and the required sample under different temperatures can be disposably obtained after the completion of sintering, you can convenient disposably to complete every table
Seek peace quantitative measurement.
The course of work and principle：Before sintering, the truncated cone projection bar 6 of lower graphite drift 22 is first directed at graphite sleeve 1
Cavity position load graphite sleeve 1 lower end, then material is respectively charged into the different cavitys of graphite sleeve 1, passes through precompressed pressure head 3
To material bed carry out precompressed, make the material bed height for being less than or equal to graphite sleeve with the height of two raised sums of bar 6 after precompressed
Degree, then the truncated cone projection bar 6 of upper graphite drift 21 is directed at the cavity position of graphite sleeve 1 and loads the upper end of sleeve 1.Wherein just
Secondary when installing, the truncated cone projection bar 6 of upper and lower graphite drift 2 should be higher than that the height of sleeve 1 with material bed height sum.This
Precompressed pressure head 3 in invention can ensure that the material of each cavity is pre-stressed to same height to the sample precompressed simultaneously of each cavity
Degree, reduce sintering error.Afterwards, the mould installed is put into SPS sintering furnaces, adjusts sintering parameter.It is to be sintered to complete cooling
After cooling, it is stripped, because the truncated cone projection bar 6 of graphite drift 2 is conical and the upper groove 7 of ring flange 5 presence,
Make the sample easy mold release of the mould.
Take out the sample of each cavity in Multicarity pressureless sintering mould shown in Fig. 2, you can once obtain batch samples.
For Fig. 3 and Fig. 4 Multicarity pressureless sintering moulds, first take a certain amount of difference of shape characteristic at different temperatures obvious
Reference substance be placed in the Multicarity pressureless sintering mould, be sintered under fixed sintering parameter, sintering complete cooling drop
Each cavity sintering reference substance is taken out after temperature, each cavity temperature scope is determined by shape characteristic.The sample of test is put needed for taking again
In the Multicarity pressureless sintering mould, it is placed under identical sintering parameter and is sintered, sintering completion is taken out after cooling, i.e.,
The sintered sample of different temperatures is can obtain, convenience is disposably characterized and performance test.
It should be noted that above-described embodiment is only intended to clearly illustrate example of the present invention, and not to reality
Apply the restriction of mode.For those of ordinary skill in the field, can also make on the basis of the above description other
Various forms of changes or variation.It is every that various possible equivalent substitutions or change are made according to foregoing description, it is all considered to belong to
In the scope of the claims of the present invention.
Claims (8)
1. a kind of Multicarity pressureless sintering graphite jig, including graphite sleeve, upper graphite drift, lower graphite drift and precompressed pressure
Head, the thermometer hole of radial direction is provided with the outer wall of graphite sleeve；The upper graphite drift is identical with lower graphite punch structure, described
Upper graphite drift and lower graphite drift are oppositely arranged and are respectively arranged at the upper and lower ends of the graphite sleeve, make cylinder raised
The inside cavity that bar is located at graphite sleeve is encapsulated in material bed between cavity；The precompressed pressure head be by cylinder ring flange with
The entirety that the cylinder projection bar being arranged on cylinder ring flange connects into, the height and sleeve of cylinder projection bar are high
Spend identical, it is characterised in that
The graphite sleeve is the hollow cylinder of Multicarity；
The upper graphite drift and lower graphite drift are by cylindrical flange disk and are arranged at some on cylindrical flange disk
Truncated cone projection bar forms, and each truncated cone projection bar and the diameter of section of ring flange connecting side are less than away from ring flange side
Diameter；The truncated cone projection bar be centrosymmetric on the surface of cylindrical flange disk setting or irregular setting,
The surface of cylindrical flange disk opens up fluted, and diametric(al) of the groove along cylindrical flange disk is simultaneously raised in truncated cone
Disconnected at bar, the cylindrical flange panel surface being centrosymmetric for truncated cone projection bar opens up the groove of more than two, right
The groove of one or more is opened up in the cylindrical flange panel surface of the irregular setting of raised bar；
The quantity of the truncated cone projection bar of the upper graphite drift and lower graphite drift and position, the cylinder of precompressed pressure head are convex
Quantity and the position for playing bar are corresponding with the quantity of setting cavity and position in graphite sleeve.
2. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that be centrosymmetric for cavity
Graphite sleeve, the thermometer hole is located at the axial point midway of graphite sleeve outer wall, and with wherein a cavity and sleeve
It is centrally located at same straight line；It is in the graphite sleeve of irregular setting for cavity, the thermometer hole is located at graphite sleeve outer wall
The point midway of axial direction, it is located at same straight line with the cavity and bushing core nearest from sleeve periphery.
3. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that inside the graphite sleeve
When the cavity of setting is even number, each cavity is centrosymmetric on the central shaft of graphite sleeve；Set inside graphite sleeve
When the cavity put is odd number, one of cavity is located at the center of graphite sleeve, and remaining cavity is in graphite sleeve
Mandrel is centrosymmetric.
4. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that the upper graphite drift is with
The maximum gauge of the truncated cone projection bar of graphite drift is less than or equal to the cavity internal diameter of graphite sleeve.
5. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that the upper graphite drift is with
The diameter of the cylindrical flange disk of graphite drift is identical with the external diameter of sleeve.
6. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that the upper graphite drift is with
It is material bed to be less than etc. with the height sum of the truncated cone projection bar of lower graphite drift with upper graphite drift when graphite drift sinters
In the height of sleeve.
7. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that the cylinder of the precompressed pressure head
The diameter of body projection bar is equal to the internal diameter of barrel bore body, and the diameter of the precompressed pressure head cylinder ring flange is equal to the outer of sleeve
Footpath.
8. Multicarity pressureless sintering graphite jig according to claim 1, it is characterised in that the stone of Multicarity pressureless sintering
Black mould is prepared by graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710678143.1A CN107498038B (en) | 2017-08-09 | 2017-08-09 | Multi-cavity pressureless sintering graphite die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710678143.1A CN107498038B (en) | 2017-08-09 | 2017-08-09 | Multi-cavity pressureless sintering graphite die |
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| Publication Number | Publication Date |
|---|---|
| CN107498038A true CN107498038A (en) | 2017-12-22 |
| CN107498038B CN107498038B (en) | 2019-12-10 |
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| CN201710678143.1A Active CN107498038B (en) | 2017-08-09 | 2017-08-09 | Multi-cavity pressureless sintering graphite die |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109465449A (en) * | 2019-01-07 | 2019-03-15 | 哈尔滨工业大学 | A kind of beneficial friction Fast Sintering forming method of larger ratio of height to diameter hard alloy cutter |
| CN110274471A (en) * | 2018-03-16 | 2019-09-24 | 中国科学院物理研究所 | Probe-type high throughput discharging plasma sintering equipment |
| CN111825431A (en) * | 2020-05-20 | 2020-10-27 | 中国工程物理研究院材料研究所 | High-flux integrated preparation method of composite material |
| CN112548078A (en) * | 2020-12-11 | 2021-03-26 | 西安交通大学 | High-flux preparation method of gravity-impregnated composite bucket tooth |
| CN112589095A (en) * | 2020-12-11 | 2021-04-02 | 西安交通大学 | High-flux preparation method of gravity-infiltrated iron-based composite material preform |
| CN113154882A (en) * | 2021-04-27 | 2021-07-23 | 华南师范大学 | Non-pressure rapid sintering device and method for 3D printing |
| CN114871431A (en) * | 2022-05-10 | 2022-08-09 | 哈尔滨工业大学 | High-throughput rod preparation device and application method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274471A (en) * | 2018-03-16 | 2019-09-24 | 中国科学院物理研究所 | Probe-type high throughput discharging plasma sintering equipment |
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| CN109465449B (en) * | 2019-01-07 | 2020-06-09 | 哈尔滨工业大学 | Beneficial friction rapid sintering forming method for hard alloy cutter with large height-diameter ratio |
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| CN112548078A (en) * | 2020-12-11 | 2021-03-26 | 西安交通大学 | High-flux preparation method of gravity-impregnated composite bucket tooth |
| CN112589095A (en) * | 2020-12-11 | 2021-04-02 | 西安交通大学 | High-flux preparation method of gravity-infiltrated iron-based composite material preform |
| CN113154882A (en) * | 2021-04-27 | 2021-07-23 | 华南师范大学 | Non-pressure rapid sintering device and method for 3D printing |
| CN113154882B (en) * | 2021-04-27 | 2023-08-29 | 华南师范大学 | Pressureless rapid sintering device and sintering method for 3D printing |
| CN114871431A (en) * | 2022-05-10 | 2022-08-09 | 哈尔滨工业大学 | High-throughput rod preparation device and application method thereof |
| CN114871431B (en) * | 2022-05-10 | 2024-03-29 | 哈尔滨工业大学 | High-flux bar preparation device and application method thereof |
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