EP1049549A1 - Cast part, method for producing a cast part and casting mould - Google Patents
Cast part, method for producing a cast part and casting mouldInfo
- Publication number
- EP1049549A1 EP1049549A1 EP99932439A EP99932439A EP1049549A1 EP 1049549 A1 EP1049549 A1 EP 1049549A1 EP 99932439 A EP99932439 A EP 99932439A EP 99932439 A EP99932439 A EP 99932439A EP 1049549 A1 EP1049549 A1 EP 1049549A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- positioning element
- mold
- area
- casting mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
- B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
Definitions
- the invention relates to a positioning element with a surface, an initial region and an end region, which serves to space two casting mold regions, in particular a lost casting mold, these at least partially delimiting a casting region, which casting region can be filled with a casting material.
- the invention further relates to a casting mold, a casting and a method for producing a casting.
- a casting mold which has an outer shell and a casting core.
- the outer shell encloses a casting space that defines an outer shape of the casting.
- the casting core is arranged in the casting space and is spaced and positioned by a support from the outer shell.
- a casting area is formed between the outer shell and the casting core and can be filled with a casting material. If the casting has two adjacent inner cavities, which are separated from one another by an intermediate wall made of the casting material, then two casting cores which are arranged in the casting space are used to produce the inner cavities.
- the casting cores each have a casting area, the casting areas being spaced apart from one another so that the casting space extends between them to produce the intermediate wall.
- the support is designed both for spacing and positioning the casting cores with respect to the outer shell, and for spacing and positioning the casting mold regions. 2 det. It consists of a material that melts when the casting area is poured out and connects to the casting material. The melting can make the support unstable when pouring out the casting area, so that it can no longer reliably prevent the position of the lost casting area from changing.
- the inner cavity of the casting is used to guide a cooling fluid, cooling fluid can undesirably emerge from the inner cavity through the holes.
- the posts are metallic cylindrical pins which protrude into the outer shell and end on the casting core. Because the outer shell and the core are removed and destroyed after the casting is made, they are also referred to as the lost outer shell and core.
- the object of the invention is to provide a casting mold with a positioning element which is used to space the casting mold regions, in particular lost casting mold regions. Further tasks are to specify a cast part and a method for producing a cast part.
- the object directed to the casting mold with positioning element is achieved by a casting mold with a positioning element according to the preamble of patent claim 1, which has a geometrical configuration which, after the casting area has been poured out, is secured against falling out of the casting material conditionally.
- a casting mold with at least one casting core or a casting core structure is used to produce a casting with a plurality of adjacent interior cavities or a plurality of interconnected interior cavity regions of an interior cavity.
- a mold core defines an inner mold area.
- the inner cavities or the inner cavity areas of the casting are separated from one another by an intermediate wall and can be used, for example, to guide a cooling fluid for cooling the casting.
- the lost mold areas are referred to as mold areas of a cast core or of a cast core structure which is destroyed and is therefore lost after being used for producing the cast part.
- One positioning element or several positioning 4 elements serve / serve the fixed positioning (fixation) of cast cores or cast core areas, so that a mutual displacement of these core parts is avoided when pouring.
- the casting space between the, in particular lost, mold areas serves to produce the intermediate wall.
- the positioning element is enclosed by casting material between its starting area and its end area. Due to the geometrical configuration of the positioning element, falling out of the intermediate wall is reliably avoided, so that no holes can arise in the intermediate wall. At most, there is a small gap between the casting material and the surface of the positioning element. Due to the preferred geometric configuration, the positioning element is held in the intermediate wall, and due to the possibly remaining intermediate space, only a small amount of cooling fluid can pass when cooling fluid is guided through the inner cavity regions.
- the geometric configuration of the positioning element preferably has a contour of the surface with at least one local extremum between the start region and the end region.
- the starting region and the end region preferably each have a thickening.
- the positioning element additionally or alternatively has a thickening between the start region and the end region.
- the positioning element is formed from a base material that has a higher melting point than the cast material.
- a nickel-based or cobalt-based superalloy is used as the casting material, for example. Melting, melting or melting of the base material when pouring out the casting 5 empires with the casting material is omitted in this case. A change in the position of the, in particular lost, casting cores or the geometry of the, in particular lost, casting core structure is thereby avoided.
- the base material is further preferably a metal, in particular tungsten.
- a protective layer in particular an oxide layer, is preferably attached to the surface of the positioning element.
- the positioning element is preferably used for spacing two, in particular lost, mold regions which are used to produce a turbine blade.
- The, in particular lost, mold regions are further preferably used to produce at least one inner cavity in the turbine blade.
- the start region and / or the end region of the positioning element preferably protrude into a respective, in particular lost, mold region. As a result, the positioning element is held in the mold areas and is secured against slipping.
- the object directed to the cast part is achieved by a cast part, in particular a turbine blade for a gas turbine, according to the preamble of patent claim 9, the intermediate wall having a positioning element which is at least partially enclosed by the cast material and has a geometric configuration which a protection against falling out of the casting material.
- the cast part has a positioning element, which according to the 6 stanchions regarding the design of a mold is formed.
- a pourable casting area is at least partially limited, in which casting area a positioning element is arranged with which the Mold areas are spaced apart.
- the casting area is poured out with a casting material which at least partially surrounds the positioning element after solidification.
- the positioning element has a geometric configuration which prevents it from falling out of the cast material.
- the positioning element, the casting mold, the casting and the method for producing a casting are explained in more detail by way of example using the exemplary embodiments shown in the drawing.
- FIG. 3 shows a turbine blade of a gas turbine in a cross section
- F FIIGG 4 4 a positioning element in a longitudinal section
- 5 shows a further positioning element in a longitudinal section.
- FIG. 1 shows a cross section through a casting mold 1 directed along a main axis 24 for producing a gas turbine blade.
- the casting mold 1 has an outer shell 2 which surrounds a casting space 7, in which three casting cores 3, 4 and 5 are positioned with the aid of support elements 6 and are spaced apart from the outer shell 2. It is also possible to space the casting cores 3, 4, 5 outside the casting area 8 with respect to the main axis 24 with respect to the outer shell 2 by e.g. B. a suitable suspension. In this case, the casting cores 3, 4, 5 are fixed at one end and movable at the other end. As a result, a casting area 8 is formed between the outer shell 2 and the casting cores 3, 4 and 5.
- the outer shell 2 forms an outer mold area 40.
- the cast cores 3, 4 and 5 each form the inner mold areas 9, 10 and 11, which are spaced apart from one another by positioning elements 12 to 16.
- the positioning elements 12 to 16 are made of a base material 35 (see FIG. 4 or FIG. 5).
- the support elements 6 each protrude m the outer shell 2 and the positioning elements 13 and 14 protrude into the mold areas 9 and 10 and the positioning element 16 protrudes into the mold areas 10 and 11.
- Cast material 23 for example a nickel-based or cobalt-based superalloy.
- the casting material 23 encloses the support elements 6 and the positioning elements 12 to 16 in the casting area 8.
- the casting cores 3 to 5 are removed.
- the positioning elements 12 to 16 each have a geometric configuration which prevents them from falling out of the casting material 23, even if the casting material 23 does not fuse with the base material 35.
- a casting mold 2 for producing a casting 17, in particular a turbine blade, with an outer shell 2 and casting cores 3, 4 and 5 arranged therein is greatly simplified and schematized. Adjacent pairs of casting cores 3, 4 and 4, 5 are respectively fixed against each other by positioning elements 14.
- the casting cores 3, 4 and 5 are fixedly connected to the outer shell 2 at a fixed end 42 and are movably supported on a loose end 43 opposite the fixed end 42 along the main axis 24 by at least one respective floating bearing (slide bearing) 41 along the main axis 24 .
- This ensures that when casting material 23 is poured into the casting area 8 formed between the outer shell 2 and the casting cores 3, 4, 5, there is no displacement of the casting cores 3, 4, 5 in the transverse direction with respect to one another and with respect to the outer shell 2.
- FIG. 3 shows a cross section through a casting 17 that can be produced with the casting mold 8, in particular a turbine blade 17.
- the turbine blade 17 has three cavities 18 to 20. These are defined in the manufacture of the casting 17 by the casting cores 3, 4 and 5. Between the cavities 18 and 19 as well as 19 and 20 there is an intermediate wall 21 and 22.
- the intermediate wall 21 In the intermediate wall 21 the positioning elements 12 to 14 are attached, which due to their geometrical configuration cannot fall out of the intermediate wall 21 formed with the casting material 23 .
- the intermediate wall 22 has the positioning elements 15 and 16, which likewise cannot fall out of the cast material 23 due to their geometric configuration (with a kink, with a hole).
- FIG. 4 shows the positioning element 14 in an enlarged view. It is essentially cylindrical 9 with an initial region 25, an end region 26 and a surface 27 with a surface contour 28.
- the surface contour 28 has a local extremum 29 between the start region 25 and the end region 26, a maximum 29 due to a thickening 30 provided between the start region 25 and the end region 26.
- FIG. 5 shows an enlarged representation of the positioning element 13, which has a thickening 31 and 32 at its end region 25 and at its starting region 26.
- the surface contour 28 has a local extremum 33, a minimum, between the start region 25 and the end region 26.
- the invention is characterized by a positioning element with an initial region and an end region, which positioning element has a geometrical configuration which, after enclosing the positioning element between the initial region and the end region with a casting material, prevents it from falling out of the casting material.
- the positioning element is used to fix two inner mold areas (casting cores, casting core areas) against each other.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19802573 | 1998-01-23 | ||
DE19802573 | 1998-01-23 | ||
PCT/DE1999/000121 WO1999037421A1 (en) | 1998-01-23 | 1999-01-19 | Cast part, method for producing a cast part and casting mould |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1049549A1 true EP1049549A1 (en) | 2000-11-08 |
EP1049549B1 EP1049549B1 (en) | 2003-01-15 |
Family
ID=7855499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99932439A Expired - Lifetime EP1049549B1 (en) | 1998-01-23 | 1999-01-19 | Casting apparatus with a casting mould and a positioning member |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1049549B1 (en) |
JP (1) | JP4327351B2 (en) |
DE (1) | DE59904037D1 (en) |
WO (1) | WO1999037421A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3821996A1 (en) * | 2014-02-28 | 2021-05-19 | Raytheon Technologies Corporation | Core assembly including studded spacer |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2874187B1 (en) * | 2004-08-16 | 2008-01-25 | Snecma Moteurs Sa | PROCESS FOR PRODUCING A TURBOMACHINE BLADE BY PERFORATED WAX MOLDING |
US7134475B2 (en) | 2004-10-29 | 2006-11-14 | United Technologies Corporation | Investment casting cores and methods |
JP5254675B2 (en) * | 2008-06-16 | 2013-08-07 | 三菱重工業株式会社 | Turbine blade manufacturing core and turbine blade manufacturing method |
EP2460604A1 (en) * | 2010-12-01 | 2012-06-06 | Siemens Aktiengesellschaft | Method and apparatus for casting a hollow component of a turbomachine |
US9550230B2 (en) * | 2011-09-16 | 2017-01-24 | United Technologies Corporation | Mold for casting a workpiece that includes one or more casting pins |
FR3120807B1 (en) * | 2021-03-16 | 2023-12-01 | Safran Aircraft Engines | Lost wax casting manufacturing process |
CN116174660B (en) * | 2023-04-25 | 2023-06-30 | 蓬莱三和铸造有限公司 | High-precision casting device for balance shaft of mine car |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1141203A (en) * | 1956-02-08 | 1957-08-28 | Von Roll Ag | Casting process for thin-walled hollow bodies and foundry hollow bodies produced by this process |
US4487246A (en) * | 1982-04-12 | 1984-12-11 | Howmet Turbine Components Corporation | System for locating cores in casting molds |
US4596281A (en) * | 1982-09-02 | 1986-06-24 | Trw Inc. | Mold core and method of forming internal passages in an airfoil |
JPS60121038A (en) * | 1983-12-02 | 1985-06-28 | Mazda Motor Corp | Assembling method of casting mold |
GB2150875B (en) * | 1983-12-07 | 1986-07-02 | Rolls Royce | Investment casting |
-
1999
- 1999-01-19 EP EP99932439A patent/EP1049549B1/en not_active Expired - Lifetime
- 1999-01-19 WO PCT/DE1999/000121 patent/WO1999037421A1/en active IP Right Grant
- 1999-01-19 DE DE59904037T patent/DE59904037D1/en not_active Expired - Lifetime
- 1999-01-19 JP JP2000528386A patent/JP4327351B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9937421A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3821996A1 (en) * | 2014-02-28 | 2021-05-19 | Raytheon Technologies Corporation | Core assembly including studded spacer |
US11014145B2 (en) | 2014-02-28 | 2021-05-25 | Raytheon Technologies Corporation | Core assembly including studded spacer |
Also Published As
Publication number | Publication date |
---|---|
DE59904037D1 (en) | 2003-02-20 |
EP1049549B1 (en) | 2003-01-15 |
JP2002500955A (en) | 2002-01-15 |
JP4327351B2 (en) | 2009-09-09 |
WO1999037421A1 (en) | 1999-07-29 |
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