CN2811291Y - Centrifugal hot-pressed sintering device - Google Patents
Centrifugal hot-pressed sintering device Download PDFInfo
- Publication number
- CN2811291Y CN2811291Y CN 200520031512 CN200520031512U CN2811291Y CN 2811291 Y CN2811291 Y CN 2811291Y CN 200520031512 CN200520031512 CN 200520031512 CN 200520031512 U CN200520031512 U CN 200520031512U CN 2811291 Y CN2811291 Y CN 2811291Y
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- main shaft
- centrifuge
- mould
- hot press
- shaft mechanism
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Abstract
The utility model discloses a centrifugal hot pressing sintering device. The utility model comprises a heating device and a centrifuge device, wherein the heating device uses an induction heating device or a resistance heating device. The centrifuge device comprises a bracket and a machine base, wherein a protective cover and a rotary main shaft mechanism are arranged on the machine base, and a mold is arranged on the rotary main shaft mechanism. The mold comprises a centrifugal medium, an isolating layer, and a compact or granular powder, wherein the mold is positioned in a heating element in the heating device, and a cooling medium passage is arranged on the rotary main shaft mechanism. The utility model has the advantages that uniform pressing molding is realized by using centrifugal force, the homogeneity of the axial density of powder material products is increased, and meanwhile, the production efficiency of the powder material products can be improved; the pressing molding of powder material products with excircle axial direction complicated mold surfaces can be realized, and post processing difficulty and work loads can be lightened.
Description
Technical field
The utility model relates to a kind of hot pressed sintering device, specifically relates to a kind of centrifuge hot press sintering device.The utility model can be widely used in the forming and sintering of powder body material goods, such as emery wheel, sintered metal product, magnetic material product, engineering ceramics goods etc.
Background technology
The manufacturing process of powder body material goods mainly comprises powder process, moulding and sintering, i.e. powder metallurgy process, and wherein sintering is of paramount importance process procedure.Below mainly describe with the example that is processed as of metal bonding agent extra hard material grinding wheel (hereinafter to be referred as emery wheel).Emery wheel adopts the powder metallurgic method manufacturing usually, and process procedure mainly comprises: batch mixing, moulding, sintering, post-treatment etc.The degree of injury of superhard material abrasive particle in the homogeneity that emery wheel tissue and hardness and superhard material abrasive particle distribute, the sintering process directly has influence on the use properties of emery wheel, must guarantee by manufacturing process.Abrasive wheel forming and sintering link can adopt following four kinds of modes: the premolding of colding pressing (premolding pressed compact) → pressureless sintering, the premolding of colding pressing (premolding pressed compact) → hot pressed sintering, the premolding of colding pressing (premolding pressed compact) → pressureless sintering → hot pressing and (compound) hot pressed sintering.
The moulding process of emery wheel adopts the processing method of axial mold pressing for many years always.Because the loss of internal friction between the external friction power of mixed powder and mould inner wall and powder body material particle in the moulding compression process, axle pressure produces gradient when causing abrasive wheel forming, has influenced the homogeneity of abrasive wheel forming density.When particularly making high thickness emery wheel with this technology, compact density on the different axial cross sections of emery wheel differs greatly, for improving the homogeneity of abrasive wheel forming density, have to its layering moulding, sintering, processing, make the multiple layer combination emery wheel, but the fatal shortcoming of this technology is to have the ring-type seam at grinding wheel spindle between combining site, influences grinding quality.Simultaneously, have the emery wheel (as single groove or multiple-grooved) of axial complex profile,, must solve, not only take a lot of work, and take material, increased production cost greatly by post-treatment with the directly compression moulding of this technology for cylindrical.
Emery wheel compound or premolding pressed compact must carry out sintering could be used, and the agglomerating method is divided into by thermal source at present: radiation formula (Heating element, mould generate heat by electric current), induction type (intermediate frequency or ratio-frequency heating).The thermal radiation heating efficiency is low, heat-up rate produces thermograde slowly and easily; Induction heating has thermo-efficiency height, the fast advantage of rate of heating.
Centrifugal forming equipment is widely used in centrifugal casting, rotary casting of industries such as forming process of ceramics, metal casting, medicine equipment, jewellery processing etc.; But its moulding object of existing centrifugal forming equipment mainly is aqueous material, its rotating speed is generally lower, the highest 2000RPM, the centrifugal force that such rotating speed produces is too little, do not reach the required pressure of emery wheel pulverulent material moulding: the another one reason is that existing centrifugal forming equipment only can carry out centrifugal forming, can not heat in centrifugal forming.
Agglomerating plant commonly used now mainly contains various sintering press, hot-pressed sintering furnace, pressurized, heated is carried out sintering simultaneously, but, can't solve axial density distribution inequality and cylindrical and axially have the problem of complex profile emery wheel compression moulding owing to adopt the method for work of axial pressure.
Goal of the invention:
The purpose of this utility model just is to solve the problem that goods such as high thickness emery wheel adopt the axial density distribution inequality of bringing in the conventional axial extrusion forming technology, reach cylindrical and axially have the emery wheel compression moulding difficult problem of complex profile, invent a kind of novel centrifuge hot press sintering device.
Summary of the invention
The purpose of this utility model can realize by following measure:
The utility model comprises heating unit and centrifuge apparatus; Described heating unit adopts induction heating device or resistive heating device; Centrifuge apparatus comprises support and support, described support is provided with shield cap and rotary main shaft mechanism, in rotary main shaft mechanism, be mounted with mould, described mould comprises mould baffle plate, mould external mold and core rod, in the die cavity that constitutes by mould baffle plate, mould external mold and core rod centrifugal medium, sealing coat, premolding pressed compact or granular mixture are housed, mould is in the heating unit of heating unit, and rotary main shaft mechanism is provided with cooling medium pass.
Induction heating device in the utility model comprises induction heating power and induction coil.Described support is arranged on the shield cap.Be provided with cooling medium pass in the main shaft in the rotary main shaft mechanism.Described heat-eliminating medium is water coolant or cold gas or cooling oil.Described centrifugal medium is high desnity metal particle or alloying pellet, particle size range: between 0.1～1mm.Described centrifugal medium is preferably casting tungsten carbide powder or coarse particles tungsten powder.The nut that the main shaft of rotary main shaft mechanism is provided with screw thread and is used for compaction mold.Described heat-eliminating medium outlet port is arranged on the support, and the cooling medium inlet seat is arranged on the support.
The utility model makes it to have following advantage owing to adopt said structure:
1, utilize centrifugal force to realize radially evenly extrusion forming, improve the homogeneity of high thickness grinding wheel spindle to density, compact density is high and can control, and can improve the quality product and the production efficiency of powder body material goods such as this type of emery wheel simultaneously, reduces production costs;
2, realize the compression moulding of powder body material goods such as the axial complex profile emery wheel of cylindrical, make the designer can freely design the shape of emery wheel outer circumference surface, alleviate emery wheel post-treatment difficulty and amount of finish.
Description of drawings
Accompanying drawing is a structural representation of the present utility model;
Embodiment
The utility model is done with detailed description below in conjunction with drawings and Examples:
As shown in the figure, the utility model comprises heating unit and centrifuge apparatus; Described heating unit adopts induction heating device, and this induction heating device comprises induction heating power and induction coil.Centrifuge apparatus comprises support 1 and support 15, described support 15 is provided with shield cap 10 and rotary main shaft mechanism 11, in rotary main shaft mechanism 11, be mounted with mould, described mould comprises mould baffle plate 5, mould external mold 4 and core rod 9, by in the die cavity that up and down two mould baffle plates 5, mould external mold 4 and core rods 9 constitute centrifugal medium 6, sealing coat 7, premolding pressed compact or granular mixture 8 being housed respectively from inside to outside radially, mould is in the heating unit 2 of heating unit.Be provided with cooling medium pass in the main shaft in the described rotary main shaft mechanism 11.Described heat-eliminating medium is water coolant or cold gas or cooling oil.Described centrifugal medium 6 is high desnity metal particle or alloying pellet, particle size range: between 0.1～1mm.Described centrifugal medium 6 is casting tungsten carbide powder or coarse particles tungsten powder.The nut that the main shaft of rotary main shaft mechanism 11 is provided with screw thread and is used for compaction mold.Described heat-eliminating medium outlet port 3 is arranged on the support 1, and cooling medium inlet seat 16 is arranged on the support 15.
Principle of work of the present utility model is as follows: the manufacturing process of powder body material goods comprises powder process, moulding and sintering, i.e. powder metallurgy process, and wherein sintering is of paramount importance process procedure.The utility model is the purpose that the centrifugal force that utilizes material and centrifugal medium high speed rotating to produce reaches radially compression moulding, the forming and sintering that can be widely used in powder body material goods etc. is such as emery wheel, sintered metal product, magnetic material product, engineering ceramics goods etc.Mainly be that example illustrates its principle of work below with the emery wheel: the premolding pressed compact of emery wheel or granular mixture become the base substrate with certain physical strength by the centrifugal forming sintering circuit.Because only rely on the density that centrifugal forming reached and the physical strength of emery wheel premolding pressed compact or granular mixture self limited, the utility model adopts suitable centrifugal medium, rely on the centrifugal force of its generation to improve the forming pressure of compound.
The utility model removes and comprises heating unit, centrifuge apparatus.Also the control corresponding device can be set, comprise manually or automatic control device.Heating unit provides thermal source for the emery wheel sintering, can adopt modes such as induction heating, resistive heating, adopts Frequency Induction Heating in the utility model.Control device can adopt existing conventional microcomputer automatic control, finishes the sequencing of intensification and velocity of rotation and controls automatically.
Heating unit comprises intermediate frequency power supply, induction coil 2, and centrifuge apparatus comprises support 1, heat-eliminating medium outlet port 3, mould external mold 4, mould baffle plate 5, centrifugal medium 6, sealing coat 7, premolding pressed compact or granular mixture 8, core rod 9, shield cap 10, rotary main shaft mechanism 11, motor 12, belt 13, belt wheel 14, support 15, cooling medium inlet seat 16.
Shield cap 10, rotary main shaft mechanism 11, motor 12, cooling medium inlet seat 16 are separately fixed on the support 15.Support 1 usefulness hinge is connected on the shield cap 10, also can adopt other mode of connection, can play and support and protective effect.The mould of being made up of mould baffle plate 5, mould external mold 4 and core rod 9 is through in the rotary main shaft mechanism 11, with have step to block the mould bottom in the rotary main shaft mechanism 11 that the mould bottom contacts, with in the rotary main shaft mechanism 11 that mould top contacts screw thread is arranged, with the nut that is screwed in the rotary main shaft mechanism 11 mould top is compressed.Centrifugal medium 6, sealing coat 7, premolding pressed compact or granular mixture 8 radially are respectively charged into from inside to outside by in the die cavity that up and down two mould baffle plates 5, mould external mold 4 and core rods 9 are constituted, and the die assembly that is fixed on rotary main shaft mechanism 11 is in the central position of induction coil 2.Heat-eliminating medium outlet port 3 is fixed on the support 1, and cooling medium inlet seat 16 is fixed on the support 15, and and rotary main shaft mechanism 11 two ends join and form the cooling medium pass of sealing.Belt wheel 13 is fixed on the motor 12.Belt 13 is contained on rotary main shaft mechanism 11 and the belt wheel 14.
Motor 12 drives the high speed rotary of mould by belt wheel 14, belt 13, rotary main shaft mechanism 11, and then drives centrifugal medium 6, sealing coat 7, emery wheel premolding pressed compact or granular mixture 8 rotation generation centrifugal force, realizes centrifugal extrusion forming; If induction coil 2 energising heating meanwhile can realize centrifuge hot press sintering.
Claims (9)
1, a kind of centrifuge hot press sintering device, it is characterized in that: it comprises heating unit and centrifuge apparatus; Described heating unit adopts induction heating device or resistive heating device; Centrifuge apparatus comprises support (1) and support (15), described support (15) is provided with shield cap (10) and rotary main shaft mechanism (11), in rotary main shaft mechanism (11), be mounted with mould, described mould comprises mould baffle plate (5), mould external mold (4) and core rod (9), by mould baffle plate (5), in the die cavity that mould external mold (4) and core rod (9) constitute centrifugal medium (6) is housed, sealing coat (7), premolding pressed compact or granular mixture (8), mould is in the heating unit (2) of heating unit, and rotary main shaft mechanism (11) is provided with cooling medium pass.
2, centrifuge hot press sintering device according to claim 1 is characterized in that: described heating unit adopts induction heating device, and this induction heating device comprises induction heating power and induction coil.
3, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: described support (1) is arranged on the shield cap (10).
4, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: be provided with cooling medium pass in the main shaft in the described rotary main shaft mechanism (11).
5, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: described heat-eliminating medium is water coolant or cold gas or cooling oil.
6, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: described centrifugal medium (6) is high desnity metal particle or alloying pellet, particle size range: between 0.1～1mm.
7, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: described centrifugal medium (6) is casting tungsten carbide powder or coarse particles tungsten powder.
8, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: the nut that the main shaft of rotary main shaft mechanism (11) is provided with screw thread and is used for compaction mold.
9, centrifuge hot press sintering device according to claim 1 and 2 is characterized in that: described heat-eliminating medium outlet port (3) is arranged on the support (1), and cooling medium inlet seat (16) is arranged on the support (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520031512 CN2811291Y (en) | 2005-08-12 | 2005-08-12 | Centrifugal hot-pressed sintering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520031512 CN2811291Y (en) | 2005-08-12 | 2005-08-12 | Centrifugal hot-pressed sintering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2811291Y true CN2811291Y (en) | 2006-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520031512 Expired - Fee Related CN2811291Y (en) | 2005-08-12 | 2005-08-12 | Centrifugal hot-pressed sintering device |
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| CN (1) | CN2811291Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106217586A (en) * | 2016-08-30 | 2016-12-14 | 重庆科技学院 | A kind of use for laboratory powder granule centrifugal forming device |
| CN108436080A (en) * | 2018-04-13 | 2018-08-24 | 韦敬生 | A kind of novel powder metallurgy equipment |
| CN111558702A (en) * | 2020-05-25 | 2020-08-21 | 新兴铸管股份有限公司 | Device and method for preparing ceramic coating of centrifugal cast tube |
| CN112811916A (en) * | 2020-12-28 | 2021-05-18 | 哈尔滨工业大学（威海） | Hot isostatic pressing device for carbon-based composite material and preparation method of composite material |
-
2005
- 2005-08-12 CN CN 200520031512 patent/CN2811291Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106217586A (en) * | 2016-08-30 | 2016-12-14 | 重庆科技学院 | A kind of use for laboratory powder granule centrifugal forming device |
| CN106217586B (en) * | 2016-08-30 | 2018-11-27 | 重庆科技学院 | A kind of use for laboratory powder granule centrifugal forming device |
| CN108436080A (en) * | 2018-04-13 | 2018-08-24 | 韦敬生 | A kind of novel powder metallurgy equipment |
| CN111558702A (en) * | 2020-05-25 | 2020-08-21 | 新兴铸管股份有限公司 | Device and method for preparing ceramic coating of centrifugal cast tube |
| CN111558702B (en) * | 2020-05-25 | 2021-12-03 | 新兴铸管股份有限公司 | Device and method for preparing ceramic coating of centrifugal cast tube |
| CN112811916A (en) * | 2020-12-28 | 2021-05-18 | 哈尔滨工业大学（威海） | Hot isostatic pressing device for carbon-based composite material and preparation method of composite material |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060830 Termination date: 20110812 |