CN210231525U - Cold isostatic pressing shape-preserving mold - Google Patents
Cold isostatic pressing shape-preserving mold Download PDFInfo
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- CN210231525U CN210231525U CN201921245511.4U CN201921245511U CN210231525U CN 210231525 U CN210231525 U CN 210231525U CN 201921245511 U CN201921245511 U CN 201921245511U CN 210231525 U CN210231525 U CN 210231525U
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- cold isostatic
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- fixing cylinder
- isostatic pressing
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Abstract
The utility model discloses a cold isostatic pressing guarantor's type mould, include: the sheath is of a hollow cylindrical structure with two open ends; the chassis covers the lower end of the sheath; the top disc covers the upper end of the sheath; the fixing cylinder is of a hollow cylindrical structure with two open ends, the fixing cylinder is coaxially sleeved in the sheath, and the annular side wall of the fixing cylinder is axially broken to form a gap; the core rod is cylindrical and is coaxially sleeved in the fixed cylinder; the anchor clamps, anchor clamps cover the clearance, the utility model discloses a cold isostatic pressing shape-preserving mould have simple structure, the powder body deformation degree is even among the cold isostatic pressing forming process, especially the axial atress of powder body is even, warp evenly, the high advantage of product shaping quality.
Description
Technical Field
The utility model belongs to the technical field of cold isostatic pressing and specifically relates to a shape-preserving mould that deformation is even, shaping quality is high among cold isostatic pressing.
Background
The nickel-based high-temperature alloy is an alloy material which takes nickel as a matrix (the mass fraction of the nickel is more than 50 percent), can bear large complex stress at the temperature of more than 600 ℃ and has surface stability. Nickel-based superalloys have received increasing attention in the materials field due to their high temperature resistance, good fatigue resistance and good high temperature oxidation and corrosion resistance, especially in the aerospace and navigation fields, and have become an indispensable material for engine components since their first production and practical use in jet airplanes in the uk at the end of the last thirties of the twentieth century.
The conventional nickel-based alloy forming method comprises the technological methods of casting, forging, powder metallurgy, 3D printing and the like, but the nickel-based alloy is high in alloying degree, extremely outstanding in ingot segregation problem and poor in hot workability, and is difficult to form by adopting the conventional casting-forging process, and the alloy formed by 3D printing has poor mechanical properties due to the anisotropy of internal tissues, so that the conventional use requirement cannot be met. The powder metallurgy method for preparing the high-temperature alloy has the advantages of uniform components, no macrosegregation, stable performance of a finished piece, better hot-working deformation performance and the like, and particularly, the isostatic pressing production process in the powder metallurgy can be used for producing parts with complex shapes, so that the method becomes the most common use method for forming the nickel-based alloy at present.
The isostatic pressing technology generally uses static liquid or inert gas as a pressure medium to transfer pressure, the powder body is molded by using a mold, the structure of the mold has direct influence on the final molding effect of the powder, and the improper design of the mold structure can cause the powder body, particularly the powder body, to be deformed irregularly in the axial direction, so that cracks are generated, the densification degree is low, and the like, thereby causing great influence on the mechanical property of the product, finally causing the low productivity of the product and the waste of materials.
Therefore, it is one of the technical problems to be solved by those skilled in the art to provide a cold isostatic pressing mold with reasonable structural design, uniform powder deformation degree during cold isostatic pressing, and high molding quality.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cold isostatic pressing shape-preserving mould that can improve the powder body and warp homogeneity, especially axial deformation homogeneity in cold isostatic pressing compression process is provided.
In order to solve the problem, the utility model discloses a cold isostatic pressing shape-preserving mould for the cold isostatic pressing of nickel base superalloy powder, cold isostatic pressing shape-preserving mould, include: the sheath is of a hollow cylindrical structure with two open ends; a chassis covering the lower open end of the sheath; the top disc covers the upper open end of the sheath; the fixing cylinder is of a hollow cylindrical structure with two open ends, the fixing cylinder is coaxially sleeved in the sheath, the annular side wall of the fixing cylinder is axially broken to form two oppositely arranged side edges, and a gap is formed between the two side edges; the core rod is cylindrical and is coaxially sleeved in the fixed cylinder; a clamp clamped on said two side edges, said clamp covering said gap.
Further: the top disc is of a hollow annular structure, the bottom disc is of a disc-shaped structure, the upper end of the core rod penetrates through the top disc and then is fixed in the top disc, and the lower end of the core rod is fixed on the bottom disc.
Further: the top disc is positioned on the inner side of the upper end of the sheath, and the bottom disc is positioned on the inner side of the lower end of the sheath.
Further: the cold isostatic pressing shape-preserving mold further comprises an upper clamp and a lower clamp, the upper clamp surrounds the outer side of the upper end of the sheath, and the lower clamp surrounds the outer side of the lower end of the sheath.
Further: the sheath and the top disc are made of rubber; the core rod, the base plate, the fixing barrel, the upper clamp and the lower clamp are made of stainless steel.
Further: the lower end of the fixing cylinder is coaxially attached to the upper surface of the base plate, the annular outer surface of the fixing cylinder is attached to the annular inner surface of the sheath, and a cavity for containing the nickel-based superalloy powder is arranged between the fixing cylinder and the core rod.
Further: the clamp comprises a first clamping arm and a second clamping arm which are parallel to the axial extension of the fixing cylinder respectively, and the first clamping arm and the second clamping arm are connected.
Further: and in the axial direction parallel to the fixing cylinder, the distance between two sides of the first clamping arm and the second clamping arm is recorded as h1, the distance between the centers of the first clamping arm and the second clamping arm is recorded as h2, and then the h2 is larger than the h 1.
Further: the ends of the side edges are continuously expanded in an axial direction parallel to the fixing cylinder.
Further: the cross section of the end part of the side edge is provided with a circular arc-shaped bulge or a Y-shaped bulge on a plane perpendicular to the axial direction of the fixing cylinder.
The application cold isostatic pressing shape-preserving mould have simple structure, powder body deformation degree is even among the cold isostatic pressing shaping process, especially powder body axial atress is even, warp evenly, advantage that product shaping quality is high.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the cold isostatic pressing shape-preserving mold of the present invention;
fig. 2 is a schematic perspective view of the cold isostatic pressing shape-preserving mold of the present invention at another viewing angle;
FIG. 3 is a schematic view of the cold isostatic pressing shape-preserving mold according to the present invention;
FIG. 4 is a schematic view of the top view structure of the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 3;
FIG. 6 is a schematic cross-sectional view taken along line B-B in FIG. 3;
FIG. 7 is an exploded view of the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 8 is a schematic view of a three-dimensional structure of a solid cylinder in the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 9 is a schematic view of the three-dimensional structure of the clamp in the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 10 is a schematic view of the assembly structure of the solid cylinder and the fixture in the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 11 is a schematic view of another assembly structure of the fixing cylinder and the fixture in the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 12 is a top view of the assembly structure of the solid cylinder and the fixture in the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 13 is a partially enlarged schematic view of the side edge of the solid cylinder and the fixture assembling structure in the cold isostatic pressing shape-preserving mold of the present invention;
FIG. 14 is a partially enlarged view of another assembly structure of the side edge of the fixing cylinder and the fixture in the cold isostatic pressing shape-keeping mold according to the present invention;
fig. 15 is a partially enlarged schematic view of another assembly structure of the side edge of the solid cylinder and the clamp in the cold isostatic pressing shape-preserving mold of the present invention.
In the drawings, the correspondence between each reference number and the structure is as follows:
1-clamp, 11-first clamping arm, 12-second clamping arm, 2-solid cylinder, 21-gap, 22-side edge, 3-sheath, 4-bottom plate, 5-core rod, 6-top plate, 7-upper clamp and 8-lower clamp.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
As shown in fig. 1 to 13, a cold isostatic pressing shape-preserving mold includes: the sheath 3 is of a hollow cylindrical structure with two open ends; a bottom plate 4, wherein the bottom plate 4 covers the lower open end of the sheath 3; a top disk 6, wherein the top disk 6 covers the upper open end of the sheath 3; the fixing cylinder 2 is of a hollow cylindrical structure with two open ends, the fixing cylinder 2 is coaxially sleeved in the sheath 3, the annular side wall of the fixing cylinder 2 is axially broken to form two oppositely arranged side edges 22, and a gap 21 is formed between the two side edges 22; the core rod 5 is cylindrical, and the core rod 5 is coaxially sleeved in the fixed cylinder 2; a clamp 1, wherein the clamp 1 is clamped on the two side edges 22, and the clamp 1 covers the gap 21.
This application is through setting up solid section of thick bamboo 2 in the canning 3, prevents through solid section of thick bamboo 2 that nickel base superalloy powder is in cold isostatic pressing compression process, because local atress is uneven produces the deformation, leads to cold isostatic pressing product to appear crackle, defect such as densification degree is low.
Specifically, when cold isostatic pressing is performed, because the fixed cylinder 2 is of an unclosed structure, through the gap 21 arranged along the axial direction, in the cold pressing process, the structure can shield a part of concentrated stress and adjust the stress direction, so that the phenomenon that the stress of the nickel-based high-temperature alloy powder is uneven is relieved, the stress of the nickel-based high-temperature alloy powder is even everywhere, especially in the axial direction, and finally the generated product is good in forming quality and high in yield.
Further, the top disc 6 is of a hollow annular structure, the base disc 4 is of a disc structure, the upper end of the core rod 5 penetrates through the top disc 6 and then is fixed in the top disc 6, the lower end of the core rod 5 is fixed on the base disc 4, and the core rod 5 and the base disc 4 are integrally designed, so that the core rod 5 and the base disc 4 can be omitted from being assembled independently, and the core rod 5 is prevented from sliding in the using process.
Furthermore, the top disc 6 is positioned on the inner side of the upper end of the sheath 3, and the bottom disc 4 is positioned on the inner side of the lower end of the sheath 3, so as to improve the sealing performance of the cold isostatic pressing shape-preserving mold and prevent the metal powder from leaking.
Further, the cold isostatic pressing shape-preserving mold further comprises an upper clamp 7 and a lower clamp 8, the upper clamp 7 surrounds the outer side of the upper end of the sheath 3, the lower clamp 8 surrounds the outer side of the lower end of the sheath 3, and the sheath 3, the top disc 6 and the core rod 5 are fixed together through the upper clamp 7; the sheath 3 and the chassis 4 are fixed together by the lower clamp 8.
Preferably, the sheath 3 and the top plate 6 are made of rubber; the core rod 5, the chassis 4, the fixed cylinder 2, the upper clamp 7 and the lower clamp 8 are all made of stainless steel materials.
Further, the lower end of the solid cylinder 2 is coaxially attached to the upper surface of the base plate 4, the annular outer surface of the solid cylinder 2 is attached to the annular inner surface of the sheath 3, and when the die is used, nickel-based superalloy powder is filled in a cavity between the solid cylinder 2 and the core rod 5.
When the cold isostatic pressing die is used, the base plate 4 is fixed inside the lower bottom end of the sheath 3 through the lower clamp 8, the fixing cylinder 2 is sleeved into the sheath 3, the lower end of the fixing cylinder is attached to the base plate 4, nickel-based high-temperature powder is filled into the cavity of the fixing cylinder 2 until the nickel-based high-temperature powder is 10 mm higher than the upper end of the fixing cylinder 2, the fixing cylinder is vibrated by a vibrating table, the top disc 6 is sleeved into the inner side of the upper end of the sheath 3, the core rod 5 is sleeved into the top disc 6, the lower surface of the top disc 6 is in close contact with the powder, and the base plate 4, the core rod 5 and the sheath 3 are fixed through the upper clamp 7, so that the assembly of the cold isostatic pressing die can be completed.
And then, placing the assembled cold isostatic pressing shape-keeping mold into a cavity of a cold isostatic pressing machine, completely immersing the shape-keeping mold into liquid, and then carrying out cold isostatic pressing to form powder in a cold isostatic pressing manner.
In the isostatic pressing process of the cold isostatic pressing shape-preserving mold, the annular side wall of the solid cylinder 2 can be subjected to radial force with uniform magnitude under the action of the sheath 3, so that the powder body is promoted to be uniformly deformed in the radial direction.
Furthermore, as some embodiments of the present application, the annular side wall of the fixing cylinder 2 is broken in the axial direction to form two oppositely disposed side edges 22, and the gap 21 in the axial direction is formed between the two side edges 22.
Preferably, the radian of the gap 21 is 5-10 degrees.
Further, as shown in fig. 14, the fixture 1 includes a first clamping arm 11 and a second clamping arm 12 extending parallel to the axial direction of the fixing cylinder 2, respectively, and the first clamping arm 11 and the second clamping arm 12 are connected, after the fixture 1 is assembled with the fixing cylinder 2, the first clamping arm 11 is clamped on the inner side surface of the fixing cylinder 2, and the second clamping arm 12 is clamped on the outer side surface of the fixing cylinder 2. In the axial direction parallel to the fixing cylinder 2, the clamp 1 is thin at two sides and thick at the middle, the distance between the two sides of the first clamping arm 11 and the second clamping arm 12 in the clamp 1 is denoted as h1, the distance between the centers of the first clamping arm 11 and the second clamping arm 12 is denoted as h2, and then h2 is greater than h 1.
Preferably, said h2=0.5 × h 1.
Further, the end of the side edge 22 is continuously expanded in the axial direction parallel to the fixing cylinder 2, so that the cross section of the end of the side edge 22 in the plane perpendicular to the axial direction of the fixing cylinder 2 has a circular arc-shaped protrusion, and during the use, since the distance h2 between the centers of the first and second holding arms 11 and 12 is greater than the distance h1 between the two sides, the distance between the side edges 22, i.e., the width of the gap 21, can be gradually increased under the compressive force when the cold isostatic compression is performed, and after the cold isostatic compression is completed, the side edge 22 can be spontaneously returned to the original position under the holding of the first and second holding arms 11 and 12, so that the fixing cylinder 2 can be repeatedly used without human adjustment.
As some embodiments of the present application, as shown in fig. 15, the end of the side edge 22 is continuously expanded in the axial direction parallel to the solid cylinder 2 to form a "Y" shaped protrusion, so that the cross section of the end of the side edge 22 in the plane perpendicular to the axial direction of the solid cylinder 2 is "Y", and similarly, during the use, since the distance h2 between the centers of the first and second holding arms 11 and 12 is greater than the distance h1 between the two sides, the distance between the side edges 22, i.e., the width of the gap 21, can be gradually increased under the compressive force when the cold isostatic compression is performed, and after the cold isostatic compression is completed, the side edge 22 can be spontaneously restored to the original position under the clamping of the first and second holding arms 11 and 12, so that the solid cylinder 2 can be repeatedly used several times, Without the need for human adjustment.
As some embodiments of this application, the upper end of a solid section of thick bamboo 2 is chamfered 180 fillets, the wall thickness of a solid section of thick bamboo 2 is 0.5~1mm, 30 jiaos are chamfered to the tip of anchor clamps 1 the footpath of a solid section of thick bamboo 2, the radian of 1 center department of anchor clamps and the radius of place circle with clearance 21 equals, a solid section of thick bamboo 2 with link together through interference fit between the canning 3.
Further, the chassis 4 is in interference fit with the inner wall of the sheath 3.
Further, the core rod 5 and the inner wall of the top disc 6 are in interference fit.
Further, the inner wall of the sheath 3 is in interference fit with the outer wall of the top disc 6.
Further, the upper end of going up clamp 7 keeps unanimous with the upper end position of top dish 6, it is less than to go up clamp 7 width top dish 6's width 1~ 3 mm.
To sum up, this application cold isostatic pressing guarantor type mould has simple structure, and the powder body deformation degree is even among the cold isostatic pressing forming process, and especially powder body axial atress is even, warp evenly, advantage that product shaping quality is high.
In the description of the present invention, the terms such as "upper", "lower", "top", "inner", "outer", etc. used herein indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the structure of the present mold, and the above description is intended to limit the scope of the present invention.
Claims (10)
1. A cold isostatic pressing shape-keeping mould is used for cold isostatic pressing of nickel-based high-temperature alloy powder, and is characterized in that: the cold isostatic pressing shape-preserving mold comprises:
the sheath (3) is of a hollow cylindrical structure with two open ends;
the chassis (4), the said chassis (4) covers the open end of underside of the said wrap (3);
the top disc (6), the top disc (6) covers the upper open end of the sheath (3);
the fixing cylinder (2) is of a hollow cylindrical structure with two open ends, the fixing cylinder (2) is coaxially sleeved in the sheath (3), the annular side wall of the fixing cylinder (2) is axially broken to form two oppositely arranged side edges (22), and a gap (21) is formed between the two side edges (22);
the core rod (5), the said core rod (5) is cylindrical, the said core rod (5) is fitted over the said solid type tube (2) coaxially;
-a clamp (1), said clamp (1) being clamped on said two side edges (22), said clamp (1) covering said gap (21).
2. The cold isostatic shape-preserving mold according to claim 1, wherein: the top disc (6) is of a hollow annular structure, the bottom disc (4) is of a disc-shaped structure, the upper end of the core rod (5) penetrates through the top disc (6) and then is fixed in the top disc (6), and the lower end of the core rod (5) is fixed on the bottom disc (4).
3. The cold isostatic shape-keeping die according to claim 2, wherein: the top disc (6) is positioned on the inner side of the upper end of the sheath (3), and the bottom disc (4) is positioned on the inner side of the lower end of the sheath (3).
4. The cold isostatic shape-preserving mold according to claim 1, wherein: the cold isostatic pressing shape-preserving mold further comprises an upper clamp (7) and a lower clamp (8), the upper clamp (7) surrounds the upper end outer side of the sheath (3), and the lower clamp (8) surrounds the lower end outer side of the sheath (3).
5. The cold isostatic shape-preserving mold according to claim 4, wherein: the sheath (3) and the top disc (6) are made of rubber; the core rod (5), the chassis (4), the fixing cylinder (2), the upper clamp (7) and the lower clamp (8) are made of stainless steel.
6. The cold isostatic shape-preserving mold according to claim 1, wherein: the lower end of the solid cylinder (2) is coaxially attached to the upper surface of the base plate (4), the annular outer surface of the solid cylinder (2) is attached to the annular inner surface of the sheath (3), and a cavity for containing the nickel-based superalloy powder is arranged between the solid cylinder (2) and the core rod (5).
7. The cold isostatic shape-preserving mold according to claim 1, wherein: the fixture (1) comprises a first clamping arm (11) and a second clamping arm (12) which are parallel to the axial extension of the fixing cylinder (2) respectively, and the first clamping arm (11) and the second clamping arm (12) are connected.
8. The cold isostatic shape-preserving mold according to claim 7, wherein: and in the axial direction parallel to the fixing cylinder (2), the distance between two sides of the first clamping arm (11) and the second clamping arm (12) is recorded as h1, the distance between the centers of the first clamping arm (11) and the second clamping arm (12) is recorded as h2, and then h2 is larger than h 1.
9. The cold isostatic shape-preserving mold according to claim 1, wherein: the ends of the side edges (22) are continuously expanded in an axial direction parallel to the fixing cylinder (2).
10. The cold isostatic shape-preserving mold according to claim 9, wherein: the end cross section of the side edge (22) has a circular arc-shaped bulge or a Y-shaped bulge on a plane perpendicular to the axial direction of the fixing cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921245511.4U CN210231525U (en) | 2019-08-02 | 2019-08-02 | Cold isostatic pressing shape-preserving mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921245511.4U CN210231525U (en) | 2019-08-02 | 2019-08-02 | Cold isostatic pressing shape-preserving mold |
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| Publication Number | Publication Date |
|---|---|
| CN210231525U true CN210231525U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921245511.4U Expired - Fee Related CN210231525U (en) | 2019-08-02 | 2019-08-02 | Cold isostatic pressing shape-preserving mold |
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| Country | Link |
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| CN (1) | CN210231525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894284A (en) * | 2021-10-09 | 2022-01-07 | 重庆市巨亮机械制造有限责任公司 | Water-cooled powder metallurgy forming die |
-
2019
- 2019-08-02 CN CN201921245511.4U patent/CN210231525U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894284A (en) * | 2021-10-09 | 2022-01-07 | 重庆市巨亮机械制造有限责任公司 | Water-cooled powder metallurgy forming die |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 Termination date: 20210802 |
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