CN203409247U - Device for thermoforming gradient material - Google Patents
Device for thermoforming gradient material Download PDFInfo
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- CN203409247U CN203409247U CN201320437867.4U CN201320437867U CN203409247U CN 203409247 U CN203409247 U CN 203409247U CN 201320437867 U CN201320437867 U CN 201320437867U CN 203409247 U CN203409247 U CN 203409247U
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- lower mold
- gradient
- mold holder
- mould
- circular disk
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Abstract
本实用新型公开了一种用于梯度材料热压成形的装置。上、下模架通过支柱相连；下顶杆通过下模架上中心的导柱孔及斜面与下模架构成滑动配合，下顶杆的上表面与下模架上表面在同一水平面；多个结构相同的模具通过上下叠加安装成梯度模具，并固定在下模架上，相邻模具之间分别用石棉垫片进行隔离；上模冲下端与多个模具中心孔同轴安装构成滑动配合，上模连接杆的下端伸入上模架和下模架间，并与上模冲上端连接，上模连接杆的上端伸出上模架外。本实用新型通过模具进行梯度安装的方式，可以对需要处于不同温度区间的粉末材料进行梯度式加热，利用均布的加热棒和热电偶，可以产生稳定的轴向温度梯度；采用下置式顶杆，可以快速脱模，提高了生产效率。
The utility model discloses a device for hot pressing forming of gradient materials. The upper and lower mold bases are connected by pillars; the lower ejector rods form a sliding fit with the lower mold bases through the guide post holes and inclined surfaces in the upper center of the lower mold bases, and the upper surface of the lower ejector rods is at the same level as the upper surface of the lower mold bases; Molds with the same structure are stacked up and down to form a gradient mold, and fixed on the lower mold frame. Asbestos gaskets are used to isolate adjacent molds; The lower end of the die connecting rod stretches between the upper die frame and the lower die frame, and is connected with the upper end of the upper die punch, and the upper end of the upper die connecting rod stretches out of the upper die frame. The utility model adopts the gradient installation method of the mold, which can carry out gradient heating on the powder materials that need to be in different temperature ranges, and can generate a stable axial temperature gradient by using uniformly distributed heating rods and thermocouples; the lower ejector rod is adopted , can be quickly demoulded, improving production efficiency.
Description
Technical field
The utility model relates to the device of shaping of metal powders, especially relates to a kind of device for functionally gradient material (FGM) hot forming with automatic demoulding functions.
Background technology
Powder metallurgy be produce metal or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through being shaped and sintering, manufacture the technology of metal material, composite and all kinds goods.That PM technique possesses is significantly energy-conservation, economize material, excellent performance, Product Precision is high and the series of advantages such as good stability, is very suitable for producing in enormous quantities.
Gradient function composite (functionally graded materials), first its concept by Japanese Xinye just proposing in 1986 with the quick male scholar of grade of horizontal well, it refers to that the Nomenclature Composition and Structure of Complexes of material changes to another orientation continuously from a certain orientation of material, makes the performance of material and a kind of novel functional material that function presents graded.
The composition of functionally gradient material (FGM) is graded, and the sintering temperature of each layer is different, utilizes traditional sintering method to be difficult to once-firing.Utilize the methods such as chemical vapour deposition (CVD), physical vapour deposition (PVD) to prepare functionally gradient material (FGM), cost is very high, is also difficult to realize industrialization.Utilize the combination of discharge plasma sintering technique and graphite jig, at mould inner wall, produce gradient temperature field, also can prepare functionally gradient material (FGM), but exist discharge plasma sintering furnace apparatus high cost and graphite jig to have the problems such as intensity is low, repeat usage is low.
Chinese invention patent (application number 200510094154.2) discloses a kind of method and apparatus of preparing gradient material by laser impacting welding.This device consists of laser generator, light-conducting system, absorbed layer material and workpiece clamp system, utilizes laser blast wave as the power source of impacting welding forming, utilizes the controllability of laser parameter to realize precision welding shaping.This device can accurately be controlled the intensity of weld interface and in conjunction with the degree of depth, but unavoidably can produce larger welding stress and welding gap at contact layer.
Chinese utility model patent (application number 201120380426.6) discloses a kind of graphite jig for sintering gradient material, comprises die, liner, punch seaming chuck, punch push-down head, thermocouple and powder to be sintered.When this mould utilizes discharge plasma sintering, because electric current partly there will be the density skewness of electric current at the frustum of a cone of die, the closeer part of electric current can produce more Joule heat, thereby produces axial-temperature gradient in the frustum of a cone part of die.Utilize this mould can produce stable axial-temperature gradient, and powder inner radial thermograde to be sintered is little, sintering pressure is large, and mould is not easy to damage.But because frustum of a cone gradient is fixed, so the thermograde of mould inner wall temperature is non-adjustable and thermograde is limited.
Summary of the invention
The purpose of this utility model is to provide a kind of device for functionally gradient material (FGM) hot forming, have simple in structure, thermograde is controlled, it is seamless between moulding material to make, be shaped fast and the feature of automatic demoulding.
The technical solution adopted in the utility model is:
Top mold frame of the present utility model is connected by four pillars with lower mold holder; Lower mold holder is fixed by screw and base; The guide pillar hole of lower push rod by center on lower mold holder and inclined-plane and lower mold holder form and are slidably matched, and the upper surface of lower push rod and lower mold holder upper surface remain on same level; The mould that a plurality of structures are identical is installed by the mode superposeing up and down, becomes gradient mould, and is fixed on lower mold holder with long spiro nail, between adjacent molds, isolates respectively with asbestos washer; Upper punch lower end and a plurality of mold center hole are coaxially installed to form and are slidably matched, and the lower end of patrix connecting rod is stretched between top mold frame and lower mold holder, and is connected with upper punch upper end, and stretch out outside top mold frame the upper end of patrix connecting rod.
The described identical mould of a plurality of structures, all, have the circular disk of circular hole, it is trapezoidal boss that circular disk upper surface has cross section, it is trapezoidal groove that circular disk lower surface has cross section, boss and groove are coaxially arranged, are evenly equipped with two above heating rods and a detection thermocouple in the circumferential hole of circular disk; First asbestos washer pad is at groove end face, and second, the 3rd asbestos washer pads respectively at circular disk lower surface.
The beneficial effects of the utility model are:
(1) the described device for functionally gradient material (FGM) hot forming, utilizes uniform heating rod and thermocouple, can produce stable axial-temperature gradient; There is the function of different materials being carried out to gradient-heated, can effectively prepare FGM.
(2) the described method for functionally gradient material (FGM) hot forming, can adopt the mode of precompressed to make multistage material fine and close, avoids occurring the gap of multistage material junction.
(3) the described device for functionally gradient material (FGM) hot forming, equipment is simple, and replaceable parts has the features such as automatic demoulding functions.
(4) adopt underneath type push rod, can fast demoulding, improved production efficiency.
Accompanying drawing explanation
Fig. 1 is assembly structure schematic diagram of the present utility model.
Fig. 2 is mould top view of the present utility model.
Fig. 3 is die cut view of the present utility model.
Fig. 4 is the process chart that the utility model adds a kind of material.
Fig. 5 is the process chart of a kind of material of the utility model precompressed.
Fig. 6 is the process chart of two kinds of materials of the utility model precompressed.
Fig. 7 is the process chart of two kinds of material releases of the utility model.
In figure: 1. lower mold holder, 2. screw, 3. pillar, 4. top mold frame, 5. nut, 6. lower push rod, 7. upper punch, 8. screw, 9. guide pin bushing, 10. patrix connecting rod, 11. long spiro nails, 12. moulds, 13. asbestos washers, 14. heating rods, 15. thermocouples, 16. 1 kinds of materials, 17. another kind of materials.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
As shown in Figure 1, top mold frame 4 of the present utility model is connected by four pillars, 3 use nuts 5 with lower mold holder 1; Lower mold holder 1 is fixed by screw 2 and base; The guide pillar hole of lower push rod 6 by center on lower mold holder 1 and inclined-plane and lower mold holder 1 form and are slidably matched, and the upper surface of lower push rod 6 and lower mold holder 1 upper surface remain on same level; The mould 12 that a plurality of structures are identical is installed by the mode superposeing up and down, becomes gradient mould, and is fixed on lower mold holder 1 with long spiro nail 11, between adjacent molds 12, isolates respectively with asbestos washer 13; Upper punch 7 lower ends and a plurality of mould 12 centre bores are coaxially installed to form and are slidably matched, 1 of top mold frame 4 and lower mold holder is stretched in the lower end of patrix connecting rod 10, and be connected with upper punch 7 upper ends by screw 8, stretch out outside top mold frame 4 upper end of patrix connecting rod 10, and patrix connecting rod 10 and top mold frame 4 coordinate by guide pin bushing 9.
As shown in Figure 2 and Figure 3, the mould 12 that a plurality of structures are identical, all, have the circular disk of circular hole, it is trapezoidal boss that circular disk upper surface has cross section, it is trapezoidal groove that circular disk lower surface has cross section, boss and groove are coaxially arranged, are evenly equipped with two above heating rods 14 and a thermocouple 15 for detection in the circumferential hole of circular disk, can accurately control mould 12 temperature; First asbestos washer pad is at groove end face, and second, the 3rd asbestos washer pads respectively at circular disk lower surface.When adjacent molds 12 gradients are installed, on it, the inclined surface of low groove and the inclined surface of boss are outside direct contact portion, all have asbestos washer between remaining surface, to guarantee the installation accuracy of 12 of adjacent molds.
The described device of use the utility model proposes carries out the method for functionally gradient material (FGM) hot forming, and its specific implementation process is as follows:
(1) powder to be sintered that packs as shown in Figure 4, a kind of material 16 in the die cavity of gradient mould into.
(2) as shown in Figure 5, patrix connecting rod 10 drives upper punch 7 descending, a kind of powder to be sintered of material 16 is carried out to compacting under normal temperature, by the control to powder amount, height after powder is compacted is concordant with the top edge of bottom mould 12, to make commaterial in same temperature range.
(3) as shown in Figure 6, the powder to be sintered that packs another kind of material 17 on the powder of a kind of material 16 being compacted into, by patrix connecting rod 10, drive that upper punch 7 are descending carries out compacting under normal temperature, by the control to powder amount, it is concordant with the top edge of respective layer mould 12 after powder is compacted, by this step, make all material all with corresponding mould 12 in sustained height.
(4) repeat above-mentioned step, complete compacting under the normal temperature of all powders to be sintered, by this step, both guaranteed functionally gradient material (FGM) and unification on corresponding mould 12 height, also eliminated functionally gradient material (FGM) gap between layers.
(5) as shown in Figure 6, utilize 14 pairs of moulds 12 of heating rod to heat, the heating rod 14 of different layers need to produce different heating powers by being shaped, and forms the thermograde of die cavity inside, and corresponding material is carried out to gradient-heated.By thermocouple 15, detect each layer of temperature, when each layer all reaches predetermined temperature, be incubated, utilize the descending drive upper punch 7 of patrix connecting rod 10, precompressed sample is carried out to hot pressing, and pressurize a period of time.
(6) as shown in Figure 7, treat that heat-insulation pressure keeping finishes, powder forming completes, and closes heating system.Upper punch 7 rises to certain altitude to be stopped, and utilizes lower push rod 6 that shaping block is upwards ejected, and completes the demoulding.
Repeat above-mentioned operation, can realize continuous processing.
The above-mentioned specific embodiment is used for the utility model of explaining; rather than the utility model is limited; in the protection domain of spirit of the present utility model and claim, any modification and change that the utility model is made, all fall into protection domain of the present utility model.
Claims (2)
1. for a device for functionally gradient material (FGM) hot forming, it is characterized in that: top mold frame (4) is connected by four pillars (3) with lower mold holder (1); Lower mold holder (1) is fixed by screw (2) and base; Lower push rod (6) is slidably matched with lower mold holder (1) formation by guide pillar hole and the inclined-plane at the upper center of lower mold holder (1), and the upper surface of lower push rod (6) and lower mold holder (1) upper surface remain on same level; The mould that a plurality of structures are identical (12) is installed by the mode superposeing up and down, becomes gradient mould, and it is upper with long spiro nail (11), to be fixed on lower mold holder (1), between adjacent molds, isolates respectively with asbestos washer; Upper punch (7) lower end and a plurality of mould (12) centre bore are coaxially installed to form and are slidably matched, the lower end of patrix connecting rod (10) is stretched between top mold frame (4) and lower mold holder (1), and be connected with upper punch (7) upper end, stretch out outside top mold frame (4) upper end of patrix connecting rod (10).
2. a kind of device for functionally gradient material (FGM) hot forming according to claim 1, it is characterized in that: the mould (12) that described a plurality of structures are identical, all, have the circular disk of circular hole, it is trapezoidal boss that circular disk upper surface has cross section, it is trapezoidal groove that circular disk lower surface has cross section, boss and groove are coaxially arranged, are evenly equipped with two above heating rods (14) and a thermocouple for detection (15) in the circumferential hole of circular disk; First asbestos washer pad is at groove end face, and second, the 3rd asbestos washer pads respectively at circular disk lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437867.4U CN203409247U (en) | 2013-07-23 | 2013-07-23 | Device for thermoforming gradient material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437867.4U CN203409247U (en) | 2013-07-23 | 2013-07-23 | Device for thermoforming gradient material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203409247U true CN203409247U (en) | 2014-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320437867.4U Expired - Lifetime CN203409247U (en) | 2013-07-23 | 2013-07-23 | Device for thermoforming gradient material |
Country Status (1)
| Country | Link |
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| CN (1) | CN203409247U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418788A (en) * | 2013-07-23 | 2013-12-04 | 浙江大学 | Device and method for thermoforming gradient materials |
| CN112644070A (en) * | 2020-12-28 | 2021-04-13 | 陕西兴盛新材料股份有限公司 | Double-layer nested self-positioning mold and electrode demolding process method thereof |
-
2013
- 2013-07-23 CN CN201320437867.4U patent/CN203409247U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418788A (en) * | 2013-07-23 | 2013-12-04 | 浙江大学 | Device and method for thermoforming gradient materials |
| CN112644070A (en) * | 2020-12-28 | 2021-04-13 | 陕西兴盛新材料股份有限公司 | Double-layer nested self-positioning mold and electrode demolding process method thereof |
| CN112644070B (en) * | 2020-12-28 | 2022-09-20 | 陕西兴盛新材料股份有限公司 | Double-layer nested self-positioning mold and electrode demolding process method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20150520 |
|
| RGAV | Abandon patent right to avoid regrant |