CN110756799A - Foamed aluminum foaming precursor mould pressing preparation facilities - Google Patents
Foamed aluminum foaming precursor mould pressing preparation facilities Download PDFInfo
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- CN110756799A CN110756799A CN201911216867.XA CN201911216867A CN110756799A CN 110756799 A CN110756799 A CN 110756799A CN 201911216867 A CN201911216867 A CN 201911216867A CN 110756799 A CN110756799 A CN 110756799A
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- Prior art keywords
- pressing
- foamed aluminum
- mold
- die
- chamber
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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
- 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
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
Abstract
The invention discloses a foamed aluminum foaming precursor die pressing preparation device which comprises an upper punch, an inner sleeve, an outer sleeve and a lower punch, wherein the inner sleeve is arranged in the outer sleeve; the upper punch is provided with an upper die part, the cross section of the upper die part is matched with the inner groove, and the upper die part can be arranged in the inner groove; the device for preparing the foamed aluminum foaming precursor by mould pressing specifically overcomes the limitations that the traditional mould pressing and demoulding are difficult, and the prepared precursor is single in shape and size.
Description
Technical Field
The invention relates to the technical field of preparation of foamed aluminum powder by a metallurgical method, in particular to a foamed aluminum foaming precursor mould pressing preparation device.
Background
The foamed aluminum is a functional material with a porous structure, and has excellent physical properties and mechanical properties, such as light weight, energy absorption, shock absorption, buffering, sound insulation and absorption, heat insulation, electromagnetic shielding and the like; the requirements of the system on various performances such as weight reduction, structural bearing and function integration are met, the requirements of the fields such as aerospace, automobile manufacturing and rail transit on structural functional materials in the future are met, and the method has wide development and application prospects.
When the foamed aluminum is prepared by a powder metallurgy method, a foamed aluminum foaming precursor for direct foaming can be prepared by mould pressing; when metal panels are added at the two ends of the powder and the powder is pressed with the central powder, a foaming precursor with a foamed aluminum sandwich structure can be obtained. In the process of preparing the foaming precursor by mould pressing, because the powder raw material is easy to be bonded with the inner wall of the metal of the mould under pressure, particularly during hot pressing, the bonding force between the powder raw material and the inner wall is stronger, so that the demoulding of the foaming precursor is difficult, and the compactness of the foaming precursor is reduced due to the demoulding operation.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
In order to solve the technical defects, the invention adopts the technical scheme that the device for preparing the foamed aluminum precursor by die pressing comprises an upper punch, an inner sleeve, an outer sleeve and a lower punch, wherein the inner sleeve is arranged in the outer sleeve, the inner sleeve and the outer sleeve are arranged between the upper punch and the lower punch, the outer sleeve is of a cylindrical structure, and the inner sleeve is provided with an inner groove matched with the cross section of the precursor in shape; the upper punch is provided with an upper die part, the cross section of the upper die part is matched with the inner groove, and the upper die part can be arranged in the inner groove.
Preferably, a die pressing cavity and a limiting cavity are arranged in the outer sleeve, the cross sections of the die pressing cavity and the limiting cavity are both circular, the diameter of the die pressing cavity is smaller than that of the limiting cavity, the inner sleeve is arranged in the die pressing cavity, the die pressing cavity is arranged on one side close to the upper punch, and the limiting cavity is arranged on one side close to the lower punch.
Preferably, the lower punch is provided with a lower die part and a limiting part, the lower die part is arranged in a cylindrical structure, the diameter size of the lower die part is matched with the diameter size of the limiting cavity, the lower die part can be arranged in the limiting cavity, and the limiting part is matched with the lower end face of the outer sleeve.
Preferably, the height dimension of the lower die part is equal to or smaller than the depth dimension of the limiting cavity.
Preferably, the upper punch is further provided with a demoulding part, the demoulding part is circular, and the diameter of the demoulding part is smaller than that of the mould pressing cavity.
Preferably, the inner sleeve comprises a plurality of splicing blocks, the splicing blocks are connected with each other to form a ring-shaped member and are placed in the die pressing cavity, the splicing blocks are of a columnar structure, the upper end face and the lower end face of each splicing block are both arranged to be straight faces, the upper end face of each splicing block is in contact connection with the end face of the demolding portion, and the lower end face of each splicing block is in contact connection with the end face of the lower mold portion.
Preferably, the side end surfaces of the splicing blocks comprise a forming surface, a fixing surface and connecting surfaces respectively arranged on two sides of the forming surface and the fixing surface; the connecting surfaces on the two splicing blocks are correspondingly attached and connected one by one, the fixing surface is an arc surface, the arc radius of the fixing surface is matched with the radius of the cross section of the mould pressing cavity, and the forming surfaces of the splicing blocks form the inner grooves.
Preferably, the inner sleeve is further provided with a thickness adjusting block with the shape consistent with the shape of the cross section of the inner groove.
Compared with the prior art, the invention has the beneficial effects that: the device for preparing the foamed aluminum foaming precursor by mould pressing specifically overcomes the limitations that the traditional mould pressing and demoulding are difficult, and the prepared precursor is single in shape and size.
Drawings
FIG. 1 is a structural view of the foamed aluminum foaming precursor molding preparation device;
FIG. 2 is a schematic view of an operation flow of the foamed aluminum foaming precursor molding preparation device;
fig. 3 is a pictorial representation of the aluminum foam before and after foaming.
The figures in the drawings represent:
10-an upper punch; 20-inner sleeve; 30-a jacket; 40-a lower punch; 210-circular inner groove splice blocks; 220-triangular inner groove splice block; 230-thickness adjusting block.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1, fig. 1 is a structural view of the foamed aluminum foam precursor mold pressing preparation device; the foamed aluminum foaming precursor die pressing preparation device comprises an upper punch 10, an inner sleeve 20, an outer sleeve 30 and a lower punch 40. The inner sleeve 20 is arranged in the outer sleeve 30, the inner sleeve 20 and the outer sleeve 30 are arranged between the upper punch 10 and the lower punch 40, the outer sleeve 30 is of a cylindrical structure, and the inner sleeve 20 is provided with an inner groove matched with the cross section of the precursor in shape.
Preferably, a die pressing cavity and a limiting cavity are arranged in the outer sleeve 30, the cross sections of the die pressing cavity and the limiting cavity are both circular, the diameter of the die pressing cavity is smaller than that of the limiting cavity, the inner sleeve 20 is arranged in the die pressing cavity, the die pressing cavity is arranged at one side close to the upper punch 10, and the limiting cavity is arranged at one side close to the lower punch 40.
The lower punch 40 is provided with lower mould portion and restriction portion, lower mould portion sets up to the cylinder structure, lower mould portion diameter size with restriction chamber diameter size cooperation sets up, just lower mould portion can set up the restriction intracavity, restriction portion with the cooperation of the lower terminal surface of overcoat 30 sets up, works as lower mould portion sets up when restricting the intracavity, restriction portion with the lower terminal surface joint of overcoat 30, thereby it is fixed lower mould portion is in position in the restriction intracavity.
Typically, the lower mold portion height dimension is equal to or slightly less than the confined chamber depth dimension.
The upper punch 10 is provided with an upper die portion and a stripper portion, the cross-sectional shape of the upper die portion is matched with the inner groove, and the upper die portion can be arranged in the inner groove. The demolding part is generally circular, and the diameter of the demolding part is slightly smaller than that of the molding cavity, so that the inner sleeve 20 can be extruded and separated from the outer sleeve 30 through the extrusion of the demolding part on the inner sleeve 20.
The inner sleeve 20 comprises a plurality of splicing blocks, the splicing blocks are connected with each other to form a ring-shaped piece and are placed in the die pressing cavity, the splicing blocks are of a columnar structure, the upper end face and the lower end face of each splicing block are both arranged to be straight faces, the upper end face of each splicing block is in contact connection with the end face of the demolding portion, and the lower end face of each splicing block is in contact connection with the end face of the lower demolding portion.
The side end face of the splicing block comprises a forming face, a fixing face and connecting faces which are respectively arranged on two sides of the forming face and two sides of the fixing face. The two splice blocks are connected with the joint surfaces in a one-to-one fit connection mode, namely, the splice blocks pass through the joint surfaces and are connected with the splice blocks on the two adjacent sides in a fit connection mode, if the splice blocks are only provided with 2 splice blocks, and the joint surfaces on the splice blocks are connected with one-to-one fit connection mode. The fixing surface is an arc surface, the arc radius of the fixing surface is matched with the radius of the cross section of the mould pressing cavity, and after the splicing blocks are connected with each other, the fixing surface forms a complete circular arc surface to be attached to the inner wall of the mould pressing cavity, so that the positions of the splicing blocks are fixed through the mould pressing cavity. The inner grooves are formed on the molding surfaces of the splicing blocks, the molding surfaces are surfaces directly contacted with powder raw materials, and the precursor with an ideal shape is finally formed through mutual extrusion of the molding surfaces and the powder raw materials. The inner grooves with different required shapes are formed by arranging the forming surfaces with different shapes and splicing the forming surfaces with each other.
Wherein the inner sleeve 20 is designed to facilitate demolding of the precursor; when the special-shaped piece is set to be different in shape, namely a set of square or circular inner groove splicing blocks 210 or triangular inner groove splicing blocks 220, precursors with different external shapes can be prepared, and then filling and foaming of various subsequent special-shaped pieces are facilitated.
In addition, the pressing thickness of the precursor can be controlled by adding a thickness adjusting block 230 having an outer shape conforming to the inner groove cross-sectional shape in the inner sleeve 20.
As shown in fig. 2, fig. 2 is a schematic view of an operation flow of the foamed aluminum foaming precursor molding preparation device. As shown in fig. 2 (a), the process of pressing the foamed aluminum precursor is schematically illustrated in fig. 2 (a), the punch 10, the inner sleeve 20, the outer sleeve 30 and the lower punch 40 are assembled from bottom to top, when the thickness of the prepared precursor needs to be controlled, the thickness adjusting block 230 with a certain thickness is firstly put into the inner sleeve 20, and then the precursor powder raw material is added, wherein the powder addition amount is based on the condition that the powder addition amount is filled to the same plane with the upper end surfaces of the inner sleeve 20 and the outer sleeve 30; in addition, when a foamed precursor with a foamed aluminum sandwich structure is to be obtained, after the thickness adjusting block 230 is placed, a metal panel is placed on the thickness adjusting block 230, then a powder raw material is added, similarly, when the powder is added to be in the same plane with the upper end surfaces of the inner sleeve 20 and the outer sleeve 30, another metal panel is covered on the powder; after the filling operation is completed, the upper punch 10 is lightly pressed into the inner sleeve 20 filled with the filling material, and finally the whole molding device is placed under a pressure device for pressing operation.
As shown in fig. 2 (b), which is a schematic diagram of a demoulding process of a foamed aluminum precursor, after pressing is completed, the upper punch 10 and the lower punch 40 are simultaneously taken out, the taken-out upper punch 10 is inverted to place the demoulding part on the inner sleeve 20, and then the device is placed under a pressure device, and pressure is slowly applied until the inner sleeve 20 is completely removed from the outer sleeve 30, so that the demoulding operation is completed.
As shown in FIG. 3, FIG. 3 is a diagram of the foamed aluminum before and after foaming. Wherein, fig. 3 (a) is a diagram of a foamed precursor with a foamed aluminum sandwich structure prepared by the foamed aluminum foamed precursor molding preparation device, and fig. 3 (b) is a diagram of a foamed aluminum object after foaming.
The foamed aluminum foaming precursor die-pressing preparation device is high in integration level and outstanding in modularization, and is suitable for preparing the foaming precursor of the special-shaped foamed aluminum filling part.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A foamed aluminum foaming precursor die pressing preparation device is characterized by comprising an upper punch, an inner sleeve, an outer sleeve and a lower punch, wherein the inner sleeve is arranged in the outer sleeve, the inner sleeve and the outer sleeve are arranged between the upper punch and the lower punch, the outer sleeve is of a cylindrical structure, and the inner sleeve is provided with an inner groove matched with the cross section of the precursor in shape; the upper punch is provided with an upper die part, the cross section of the upper die part is matched with the inner groove, and the upper die part can be arranged in the inner groove.
2. The foamed aluminum foam precursor die-pressing preparation device according to claim 1, wherein a die-pressing chamber and a limiting chamber are provided in said outer sleeve, both said die-pressing chamber and said limiting chamber are provided in a circular cross section, and said die-pressing chamber diameter is smaller than said limiting chamber diameter, said inner sleeve is provided in said die-pressing chamber, said die-pressing chamber is provided at a side close to said upper punch, and said limiting chamber is provided at a side close to said lower punch.
3. The apparatus for mold-pressing preparation of foamed aluminum precursor according to claim 2, wherein said lower punch is provided with a lower mold portion and a restriction portion, said lower mold portion is provided in a cylindrical configuration, said lower mold portion is sized in diameter to fit with said restriction chamber and said lower mold portion is positionable in said restriction chamber, said restriction portion is fitted with said lower end surface of said outer sheath.
4. The apparatus for mold-pressing preparation of foamed aluminum precursor according to claim 3, wherein the lower mold portion has a height dimension equal to or smaller than the depth dimension of the limiting cavity.
5. The foamed aluminum foam precursor molding production apparatus as claimed in claim 2, wherein said upper punch is further provided with a mold release portion, said mold release portion is provided in a circular shape, and a diameter of said mold release portion is smaller than a diameter of said molding chamber.
6. The apparatus for mold-pressing preparation of foamed aluminum foam precursor according to claim 2, wherein the inner sleeve comprises a plurality of blocks, the blocks are connected to each other to form a ring-shaped member and are disposed in the mold-pressing cavity, the blocks are of a columnar structure, the upper and lower end faces of the blocks are arranged as flat faces, the upper end face of the block is in contact connection with the end face of the mold-releasing portion, and the lower end face of the block is in contact connection with the end face of the mold-releasing portion.
7. The molding preparation device of foamed aluminum foaming precursor according to claim 6, wherein the side end surfaces of the splicing blocks comprise a molding surface, a fixing surface, and connecting surfaces respectively arranged at two sides of the molding surface and the fixing surface; the connecting surfaces on the two splicing blocks are correspondingly attached and connected one by one, the fixing surface is an arc surface, the arc radius of the fixing surface is matched with the radius of the cross section of the mould pressing cavity, and the forming surfaces of the splicing blocks form the inner grooves.
8. The apparatus for mold-pressing preparation of foamed aluminum precursors according to claim 1, wherein the inner housing further comprises a thickness adjusting block having a shape corresponding to the cross-sectional shape of the inner groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911216867.XA CN110756799A (en) | 2019-11-29 | 2019-11-29 | Foamed aluminum foaming precursor mould pressing preparation facilities |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911216867.XA CN110756799A (en) | 2019-11-29 | 2019-11-29 | Foamed aluminum foaming precursor mould pressing preparation facilities |
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| CN110756799A true CN110756799A (en) | 2020-02-07 |
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| CN201911216867.XA Pending CN110756799A (en) | 2019-11-29 | 2019-11-29 | Foamed aluminum foaming precursor mould pressing preparation facilities |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113001720A (en) * | 2021-03-17 | 2021-06-22 | 陕西科技大学 | Hot-pressing sintering mold and using method thereof |
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