CN112296255B - Positioning method for adjusting positioning die of ceramic core of engine blade - Google Patents
Positioning method for adjusting positioning die of ceramic core of engine blade Download PDFInfo
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- CN112296255B CN112296255B CN202011207959.4A CN202011207959A CN112296255B CN 112296255 B CN112296255 B CN 112296255B CN 202011207959 A CN202011207959 A CN 202011207959A CN 112296255 B CN112296255 B CN 112296255B
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- wax
- positioning holes
- ceramic core
- wax mold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a positioning method for adjusting a ceramic core positioning die of an engine blade, which comprises an upper wax die, a lower wax die and a ceramic core, wherein a wax die cavity is formed between the upper wax die and the lower wax die; four second height positioning holes are formed in the lower wax mold; and locking bolts are arranged on one side of one length positioning hole, two width positioning holes which are positioned on the same surface of the wax mould cavity and one side of the four second height positioning holes. The invention is widely used on hollow turbine blade castings of aviation and aerospace engines, and has obvious effect.
Description
Technical Field
The invention relates to the technical field of investment precision casting, in particular to a positioning method for adjusting a positioning die of a ceramic core of an engine blade.
Background
With the increase of thrust-weight ratio of aviation and aerospace engines, the inlet temperature at the front of the turbine is continuously increased at the speed of averagely increasing 30-50 ℃ per year, so that the temperature and load borne by hot-end parts of the engine are continuously increased, and higher requirements are put forward on the working temperature and performance of the hot-end parts such as blades and the like. The method of investment precision casting is adopted to produce the hollow turbine blade, and the air cooling technology is applied to improve the working temperature of the blade, so that the blade can work at the temperature above the melting point of the high-temperature alloy. However, the shape of the inner cavity of the hollow turbine blade is complex and the space is narrow (the local part is below 1 mm), a metal mold cannot be used for parting in the investment casting process, and a ceramic core (hereinafter referred to as 'ceramic core') needs to be embedded in a blade wax mold. After casting into a casting, the ceramic core is removed to form a cavity. In order to ensure the wall thickness of the blade (and other dimensional requirements, the ceramic core needs to be positioned in a wax mould, the traditional ceramic core positioning method is to adopt a plastic or wax core support according to the wall thickness dimension, glue is adhered on the surface of the ceramic core, and the ceramic core is placed in a metal mould cavity for fixing, but no matter the plastic or wax core support, a metal mould is manufactured in advance according to different wall thickness dimensions, and injection molding or wax injection is carried out, so that the manufacturing cost of the core support is high (including the core support mould, the injection molding and wax injection costs), and in the solidification process of the blade casting after casting, because the structures of different parts are different, the shrinkage is inconsistent, and possibly part of the dimension is out of tolerance, therefore, after a round of test, the position of the ceramic core in the wax mould needs to be adjusted according to the detection result of the actual casting dimension, and the size of the plastic or wax core support is processed in place at one time, if the size adjustment needs to be carried out, the mould needs to be modified for remanufacturing, this is not only costly but also inefficient.
Disclosure of Invention
The invention provides a positioning method for adjusting a positioning die of a ceramic core of an engine blade, which can effectively solve the technical problems existing in the background.
In order to achieve the above purpose, the invention provides the following technical scheme:
a positioning method for adjusting a ceramic core positioning die of an engine blade comprises an upper wax die, a lower wax die and a ceramic core, wherein a wax die cavity is formed between the upper wax die and the lower wax die, the ceramic core is installed in the wax die cavity, the upper wax die comprises a wax injection port, four width positioning holes, two length positioning holes and two first height positioning holes, the four width positioning holes are uniformly arranged on two sides of the left side and the right side of the wax die cavity, the two length positioning holes are respectively arranged on two sides of the front side and the rear side of the wax die cavity, and the two first height positioning holes are arranged on one side of the upper surface of the wax die cavity; the wax injection port is arranged on one side of the left side of the wax mould cavity and penetrates through the wax mould cavity; the four width positioning holes, the two length positioning holes and the two first height positioning holes are internally provided with bolt structures with inner hexagonal bolts at one end face, and the end face of the other end of each bolt penetrates through the wax mold cavity and is in contact with the ceramic core; four second height positioning holes are formed in the lower wax mold die and are uniformly formed in one side below the wax mold cavity; the four second height positioning holes respectively comprise an upper part and a lower part which are arranged vertically; locking bolts are arranged on one side of one length positioning hole, two width positioning holes which are positioned on the same surface of the wax mould cavity, and one side of each of the four second height positioning holes; the end face of one end of one locking bolt vertically penetrates through one length positioning hole, the other two locking bolts respectively and vertically penetrate through two width positioning holes which are positioned on the same surface of the wax mold cavity, and the remaining four locking bolts respectively and vertically penetrate through four second height positioning holes; a cylinder is arranged in each upper part, a telescopic spring is sleeved on each cylinder, a push column is fixed below each cylinder, the lower end face of each push column is an inclined plane, a conical bolt is arranged in each lower part, the conical surface at one end of each conical bolt is mutually matched with the lower end face of each push column, and the end face at the upper end of each cylinder penetrates through the wax mold cavity and is in contact with the ceramic core; the end surface of the upper end of each cylinder is in a hemispherical shape; the end face of the other end of each conical bolt is provided with an inner hexagonal nut; the end face of the other end of each bolt is in a hemispherical shape;
the positioning method of the positioning die comprises the following steps:
the method comprises the following steps: firstly, opening an upper wax mold die, rotating bolts in one length positioning hole and two width positioning holes on the same surface of a wax mold cavity to the theoretically required size, and rotating conical bolts in four second height positioning holes to the theoretically required size;
step two: fixing locking bolts corresponding to one of the length positioning holes in the step one, two of the width positioning holes on the same surface of the wax mold cavity and the conical bolts in the four second height positioning holes in the step one, and preventing the locking bolts from moving;
step three: placing the ceramic core, screwing and controlling the bolts of the other length positioning hole and the other two width positioning holes on the same surface of the wax mold cavity, and fixing the length direction and the width direction of the ceramic core respectively; closing the upper wax mold, screwing the bolts in the two first height positioning holes to fix the height direction of the ceramic core, and injecting wax from a wax injection port to obtain a complete wax mold containing the ceramic core;
step four: when the size requirement of the ceramic core needs to be adjusted, the bolt in the other length positioning hole, the other two width positioning holes in the same surface of the wax mold cavity and the two first height positioning holes is screwed, so that the ceramic core is adjusted.
The invention has the beneficial effects that:
according to the invention, the ceramic core is positioned in the mold by adopting the novel adjusting ceramic core, so that the size adjustment of the ceramic core in the length direction, the width direction and the height direction in the wax mold can be realized, the size of the hollow turbine blade casting of the aerospace engine can be effectively controlled, the size precision of the hollow turbine blade casting and the qualification rate of products are improved, and the research and development period of the products is greatly accelerated.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1: the structure of the invention is a top view.
FIG. 2: the invention has a structural section.
FIG. 3: the invention discloses a schematic diagram of an internal structure of a second-height positioning hole.
In the figure: 1. the device comprises a wax mould upper mould, a wax mould lower mould, a ceramic core, 4, a wax mould cavity, 5, a locking bolt, 11, a wax injection port, 12, a width positioning hole, 13, a length positioning hole, 14, a first height positioning hole, 15, a bolt, 21, a second height positioning hole, 22, an upper part, 23, a lower part, 24, a cylinder, 25, a telescopic spring, 26, a push column, 27 and a conical bolt.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the attached drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims:
as shown in fig. 1 to 3, the invention provides a positioning method for adjusting a ceramic core positioning mold of an engine blade, which comprises an upper wax mold 1, a lower wax mold 2 and a ceramic core 3, wherein a wax mold cavity 4 is formed between the upper wax mold 1 and the lower wax mold 2, and the ceramic core 3 is arranged in the wax mold cavity 4.
The wax mould upper die 1 comprises a wax injection opening 11, four width positioning holes 12, two length positioning holes 13 and two first height positioning holes 14, wherein the four width positioning holes 12 are uniformly arranged on two sides of the left side and the right side of a wax mould cavity 4, the two length positioning holes 13 are respectively arranged on two sides of the front side and the rear side of the wax mould cavity 4, and the two first height positioning holes 14 are arranged on one side of the upper surface of the wax mould cavity 4.
The wax injection port 11 is arranged on the left side of the wax pattern cavity 4 and penetrates through the wax pattern cavity 4.
Four width locating holes 12, two length locating holes 13, two first height locating holes 14 all install one end terminal surface have hexagon socket head's bolt 15, and the terminal surface of every bolt 15 other end all sets up to the hemisphere face shape, and the terminal surface of every bolt 15 other end runs through wax matrix cavity 4 and contacts with ceramic core 3, thereby contacts with ceramic core 3 through bolt 15 and reaches the size that changes ceramic core 3.
The wax mould lower die 2 is provided with four second height positioning holes 21, and the four second height positioning holes 21 are uniformly arranged on one side below the wax mould cavity 4; the four second height positioning holes 21 respectively comprise an upper part 22 and a lower part 23 which are perpendicular to each other, a cylinder 24 is arranged in each upper part 22, the end face of the upper end of each cylinder 24 is hemispherical, a telescopic spring 25 is sleeved on each cylinder 24, a push column 26 is fixed below each cylinder 24, the end face of each push column 26 is inclined, a conical bolt 27 is arranged in each lower part 23, the conical surface of one end of each conical bolt 27 is mutually tangent to the lower end face of each push column 26, the end face of the upper end of each cylinder 24 penetrates through the wax mold cavity 4 and is contacted with the ceramic core 3, and an inner hexagon nut is arranged on the end face of the other end of each conical bolt 27, under the condition that the conical surface of one end of the conical bolt 27 is matched with the lower end surface of the push column 26, the cylinder 24 can be pushed to move upwards, and the end surface of the upper end of the cylinder 24 can be contacted with the ceramic core 3.
Because one of the length positioning holes 13, two of the width positioning holes 12 on the same surface of the wax mold cavity 4 and one side of each of the four second height positioning holes 21 are provided with the locking bolts 5, the end surface of one end of one of the locking bolts 5 vertically penetrates through one of the length positioning holes 13, the other two locking bolts 5 respectively vertically penetrate through two of the width positioning holes 12 on the same surface of the wax mold cavity, and the remaining four locking bolts 5 respectively vertically penetrate through the four second height positioning holes 21.
On the other hand, the positioning method of the positioning mould comprises the following steps:
the method comprises the following steps: firstly, opening the upper wax mold die 1, rotating bolts 15 in one length positioning hole 13 and two width positioning holes 12 on the same surface of the wax mold cavity 4 to the theoretically required size, and rotating conical bolts 27 in four second height positioning holes 21 to the theoretically required size;
step two: fixing the locking bolts 5 corresponding to one of the length positioning holes 13 in the step one, two of the width positioning holes 12 on the same surface of the wax mold cavity 4 and the conical bolts 27 in the four second height positioning holes 21 without moving;
step three: placing the ceramic core 3, screwing and controlling the bolts 15 of the other length positioning hole 13 and the other two width positioning holes 12 on the same surface of the wax mould cavity 4, and fixing the length direction and the width direction of the ceramic core 3 respectively; and closing the upper wax mold 1, and screwing the bolts 15 in the two first height positioning holes 14 to fix the ceramic core 3 in the height direction. Then, wax is injected from the wax injection port 14, so that a complete wax mould containing the ceramic core 3 can be obtained;
step four: when the size requirement of the ceramic core 3 needs to be adjusted, the other length positioning hole 13, the other two width positioning holes 12 on the same surface of the wax mould cavity 4 and the bolts 15 in the two first height positioning holes 14 are screwed, so that the ceramic core 3 is adjusted.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without such modifications.
Claims (1)
1. The utility model provides a positioning method for adjusting engine blade ceramic core positioning die, includes wax matrix upper mould, wax matrix lower mould, ceramic core, form the wax matrix cavity between wax matrix upper mould, the wax matrix lower mould, ceramic core installs in the wax matrix cavity, its characterized in that: the upper wax mold die comprises a wax injection port, four width positioning holes, two length positioning holes and two first height positioning holes, wherein the four width positioning holes are uniformly arranged on two sides of the left surface and the right surface of a wax mold cavity, the two length positioning holes are respectively arranged on two sides of the front surface and the back surface of the wax mold cavity, and the two first height positioning holes are arranged on one side of the upper surface of the wax mold cavity; the wax injection port is arranged on one side of the left side of the wax mould cavity and penetrates through the wax mould cavity; the four width positioning holes, the two length positioning holes and the two first height positioning holes are internally provided with bolt structures with inner hexagonal bolts at one end face, and the end face of the other end of each bolt penetrates through the wax mold cavity and is in contact with the ceramic core; four second height positioning holes are formed in the lower wax mold die and are uniformly formed in one side below the wax mold cavity; the four second height positioning holes respectively comprise an upper part and a lower part which are arranged vertically; locking bolts are arranged on one side of one length positioning hole, two width positioning holes which are positioned on the same surface of the wax mould cavity, and one side of each of the four second height positioning holes; the end face of one end of one locking bolt vertically penetrates through one length positioning hole, the other two locking bolts respectively and vertically penetrate through two width positioning holes which are positioned on the same surface of the wax mold cavity, and the remaining four locking bolts respectively and vertically penetrate through four second height positioning holes; a cylinder is arranged in each upper part, a telescopic spring is sleeved on each cylinder, a push column is fixed below each cylinder, the lower end face of each push column is an inclined plane, a conical bolt is arranged in each lower part, the conical surface at one end of each conical bolt is mutually matched with the lower end face of each push column, and the end face at the upper end of each cylinder penetrates through the wax mold cavity and is in contact with the ceramic core; the end surface of the upper end of each cylinder is in a hemispherical shape; the end face of the other end of each conical bolt is provided with an inner hexagonal nut; the end face of the other end of each bolt is in a hemispherical shape;
the positioning method of the positioning die comprises the following steps:
the method comprises the following steps: firstly, opening an upper wax mold die, rotating bolts in one length positioning hole and two width positioning holes on the same surface of a wax mold cavity to the theoretically required size, and rotating conical bolts in four second height positioning holes to the theoretically required size;
step two: fixing locking bolts corresponding to one of the length positioning holes in the step one, two of the width positioning holes on the same surface of the wax mold cavity and the conical bolts in the four second height positioning holes in the step one, and preventing the locking bolts from moving;
step three: placing the ceramic core, screwing and controlling the bolts of the other length positioning hole and the other two width positioning holes on the same surface of the wax mold cavity, and fixing the length direction and the width direction of the ceramic core respectively; closing the upper wax mold, screwing the bolts in the two first height positioning holes to fix the height direction of the ceramic core, and injecting wax from a wax injection port to obtain a complete wax mold containing the ceramic core;
step four: when the size requirement of the ceramic core needs to be adjusted, the bolt in the other length positioning hole, the other two width positioning holes in the same surface of the wax mold cavity and the two first height positioning holes is screwed, so that the ceramic core is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011207959.4A CN112296255B (en) | 2018-11-20 | 2018-11-20 | Positioning method for adjusting positioning die of ceramic core of engine blade |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811414284.3A CN109351912B (en) | 2018-11-20 | 2018-11-20 | Positioning die and positioning method for adjusting ceramic core of engine blade |
| CN202011207959.4A CN112296255B (en) | 2018-11-20 | 2018-11-20 | Positioning method for adjusting positioning die of ceramic core of engine blade |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811414284.3A Division CN109351912B (en) | 2018-11-20 | 2018-11-20 | Positioning die and positioning method for adjusting ceramic core of engine blade |
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| CN112296255A CN112296255A (en) | 2021-02-02 |
| CN112296255B true CN112296255B (en) | 2021-11-30 |
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| CN202011207959.4A Active CN112296255B (en) | 2018-11-20 | 2018-11-20 | Positioning method for adjusting positioning die of ceramic core of engine blade |
| CN201811414284.3A Active CN109351912B (en) | 2018-11-20 | 2018-11-20 | Positioning die and positioning method for adjusting ceramic core of engine blade |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112517853A (en) * | 2020-11-30 | 2021-03-19 | 中国科学院金属研究所 | Method for positioning ceramic core of guide blade of hollow turbine in mold |
| CN112517854A (en) * | 2020-12-21 | 2021-03-19 | 贵阳航发精密铸造有限公司 | Ceramic core positioning method for manufacturing hollow turbine blade |
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- 2018-11-20 CN CN201811414284.3A patent/CN109351912B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109351912B (en) | 2020-11-27 |
| CN112296255A (en) | 2021-02-02 |
| CN109351912A (en) | 2019-02-19 |
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