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公开(公告)号：US06186217B1
公开(公告)日：2001-02-13
申请号：US09203441
申请日：1998-12-01
IPC分类号： B22C910
摘要： A plurality of individual thin wall, arcuate (e.g. airfoil shaped) core elements are formed in respective master dies to have integral interlocking locating features, the individual core elements are prefired in respective ceramic setter supports to have integral locating features, the prefired core elements are assembled together using the locator features of adjacent core elements, and the assembled core elements are adhered together using ceramic adhesive introduced at internal joints defined between mating interlocked locating features. The multi-wall ceramic core assembly so produced comprises the plurality of spaced apart thin wall, arcuate core elements and joined together by at the internal joints defined between the adhered interlocked locating features.
摘要翻译： 多个单独的薄壁，弓形（例如翼型）芯元件形成在相应的主模具中以具有一体的互锁定位特征，各个芯元件预先在相应的陶瓷安装器支架中具有整体的定位特征，预烧芯元件 使用相邻芯元件的定位器特征组装在一起，并且组装的芯元件使用引入在配合的互锁定位特征之间限定的内部接头处的陶瓷粘合剂粘合在一起。 如此生产的多壁陶瓷芯组件包括多个间隔开的薄壁，弧形芯元件，并通过在粘附的互锁定位特征之间限定的内部接头处连接在一起。
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2.发明授权
公开(公告)号：US5296308A
公开(公告)日：1994-03-22
申请号：US931221
申请日：1992-08-10
CPC分类号： B22C9/04 , B22C21/14 , Y10T428/12292
摘要： A method of making a casting having an internal passage involves the steps of forming a core having an external surface configured to form the passage in the casting and having a plurality of integrally formed protrusions extending from the external surface at stressed regions thereof (e.g., thermally stressed regions) prone to be distorted from a master core configuration, and positioning the core in a pattern molding cavity by engagement of the protrusions with rigid walls defining the molding cavity such that the core is conformed substantially to a predetermined and/or empirically determined relationship between the master core configuration and the molding cavity as if the core corresponded to the master core configuration. A fugitive pattern corresponding to the casting to be formed is then molded about the external surface of the core while the core is supported in the aforementioned relationship relative to the molding cavity, whereby the wall thickness of the pattern is controlled about the core. A ceramic shell mold is then invested about the pattern and core such that the protrusions can engage the mold in the event of core movement during subsequent steps.
摘要翻译： 制造具有内部通道的铸件的方法包括形成具有外表面的芯的步骤，该外表面被构造成在铸件中形成通道，并且具有多个整体形成的突起，其从其外表面在其应力区域延伸（例如，热 应力区域）容易从母芯构造变形，并且通过突出物与限定模制腔的刚性壁的接合将芯定位在图案模制腔中，使得芯基本上符合预定和/或经验确定的关系 在主芯配置和模腔之间，如同核心对应于主芯配置一样。 然后在芯体的外表面上模制对应于要形成的铸件的短片，同时以相对于模腔的上述关系来支撑芯，由此可以围绕芯部控制图案的壁厚。 然后将陶瓷壳模具围绕图案和芯部进行投资，使得在随后的步骤中的芯部移动的情况下，突起可以与模具接合。
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3.发明授权Improved hollow cast products such as gas-cooled gas turbine engine blades 失效改进的中空铸造产品，如气冷式燃气轮机发动机叶片
公开(公告)号：US5498132A
公开(公告)日：1996-03-12
申请号：US331747
申请日：1994-10-31
CPC分类号： B22C1/00 , B22C9/103 , Y10T428/1314 , Y10T428/24942
摘要： A hollow cast product such as a gas-cooled gas turbine engine blade is formed using a composite core constructed by forming a first core part determinative of the cavity size of the trailing edge blade portion from a first ceramic material and joined to a second core part determinative of the blade cavity for the blade body portion which is formed from a second ceramic material. The first and second ceramic materials can be chosen to have appropriate characteristics grain sizes, flowability, leachability, and/or reactivity characteristics taking into consideration the different dimensional restrictions imposed by the desired blade product. A tongue is formed on the adjoining edge surface of the trailing edge core part, and the trailing edge core part is then inserted into a second die and the body core part is formed, including a complementary groove member which is formed around the tongue member on the trailing edge core part. The joined trailing edge and body core parts can then be sintered to form a composite casting core. Blade trailing edge slot thicknesses of about 0.015 inches or less can be achieved.
摘要翻译： 使用复合芯形成诸如气体冷却燃气涡轮发动机叶片的中空铸造产品，所述复合芯通过从第一陶瓷材料形成确定后缘叶片部分的腔体尺寸的第一芯部分并且连接到第二芯部分 确定由第二陶瓷材料形成的用于叶片主体部分的叶片腔。 考虑到期望的刀片产品施加的不同尺寸限制，可以选择第一和第二陶瓷材料具有适当的特性，粒度，流动性，浸出性和/或反应性特性。 在后缘铁心部分的相邻的边缘表面上形成一个舌头，然后将后缘芯部件插入第二个模具中，并且形成主体芯部分，该主体芯部分包括形成在舌部件周围的互补的沟槽部件 后缘芯部分。 然后可以将连接的后缘和主体芯部件烧结以形成复合铸造芯。 可以实现约0.015英寸或更小的刀片后缘槽厚度。
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公开(公告)号：US06494250B1
公开(公告)日：2002-12-17
申请号：US09924962
申请日：2001-08-08
申请人： Gregory R. Frank , Ronald J. Keller , Rodney S. Haaland , Charles F. Caccavale , Alfred P. Kaulius, Jr.
发明人： Gregory R. Frank , Ronald J. Keller , Rodney S. Haaland , Charles F. Caccavale , Alfred P. Kaulius, Jr.
IPC分类号： B22C100
CPC分类号： C04B35/6303 , B22C9/10 , B22C9/12 , C04B35/111 , C04B35/624 , C04B41/009 , C04B41/5045 , C04B41/87 , C04B2111/00879 , C04B2235/3206 , C04B2235/3222 , C04B2235/3225 , C04B2235/6022 , C04B2235/80 , C04B2235/96 , C04B41/4539 , C04B35/10 , C04B35/117 , C04B38/00
摘要： An impregnated fired porous alumina-based ceramic core for use in an investment shell mold in the casting of molten metals and alloys wherein the core is impregnated with yttria to improve core creep resistance at elevated casting temperatures and times.
摘要翻译： 一种浸渍的多孔氧化铝基陶瓷芯，用于熔融金属和合金铸造中的投资外壳模具中，其中芯浸渍有氧化钇，以提高铸造温度和时间下的耐芯蠕变性。
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公开(公告)号：US5394932A
公开(公告)日：1995-03-07
申请号：US831528
申请日：1992-02-05
CPC分类号： B22C1/00 , B22C9/103 , Y10T428/1314 , Y10T428/24942
摘要： A composite core for a hollow gas turbine engine blade is constructed by forming a first core part determinative of the cavity size of the trailing edge blade portion from a first ceramic material and joined to a second core part determinative of the blade cavity for the blade body portion which is formed from a second ceramic material. The first and second ceramic materials can be chosen to have appropriate characteristics grain sizes, flowability, leachability, and/or reactivity characteristics taking into consideration the different dimensional restrictions imposed by the desired blade product. A tongue is formed on the adjoining edge surface of the trailing edge core part, and the trailing edge core part is then inserted into a second die and the body core part is formed, including a complementary groove member which is formed around the tongue member on the trailing edge core part. The joined trailing edge and body core parts can then be sintered to form a composite casting core.
摘要翻译： 用于中空燃气涡轮发动机叶片的复合芯通过形成确定后缘叶片部分的腔体尺寸的第一芯部分与第一陶瓷材料相结合，并连接到确定叶片体的叶片腔体的第二芯部分 部分由第二陶瓷材料形成。 考虑到期望的刀片产品施加的不同尺寸限制，可以选择第一和第二陶瓷材料具有适当的特性，粒度，流动性，浸出性和/或反应性特性。 在后缘铁心部分的相邻的边缘表面上形成一个舌头，然后将后缘芯部件插入第二个模具中，并且形成主体芯部分，该主体芯部分包括形成在舌部件周围的互补的沟槽部件 后缘芯部分。 然后可以将连接的后缘和主体芯部件烧结以形成复合铸造芯。
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