The Experts below are selected from a list of 192 Experts worldwide ranked by ideXlab platform
Thomas H. Unger - One of the best experts on this subject based on the ideXlab platform.
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Laser Guidance for Repairing Gas Turbine Parts
Journal of Engineering for Gas Turbines and Power, 1995Co-Authors: Zev Galel, James L. Hunt, Thomas H. UngerAbstract:As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in jet engine repairs. Similar to a terrain-following cruise missile, a laser-guided cutter is used to follow a selected Datum Surface. For example, in the case of Honeycomb Airseals, the thin laser beam penetrates the honeycomb cell structure to follow the base metal. The method minimizes parent metal removal and under-minimum-wall condition. As a result, life potential of parts is extended, and repair costs are reduced. The ability to track a moving part and modify the cutting path automatically produces one more significant advantage : Accurate setup of a part on a machine is no longer critical. The method has applications in the repair of airseals, frames and cases, and airfoils.
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Laser Guidance for Repairing Gas Turbine Parts
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls Diagnostics and Instrumentation; Education; General, 1994Co-Authors: Zev Galel, James L. Hunt, Thomas H. UngerAbstract:As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in Jet Engine repairs. Similar to a terrain-following cruise missile, a laser guided cutter is used to follow a selected Datum Surface. For example, in the case of Honeycomb Airseals, the thin laser beam penetrates through the honeycomb cell structure to follow the base metal. The method minimizes parent metal removal and under-minimum-wall condition. As a result, life potential of parts is extended, and repair costs are reduced. The ability to track a moving part and modify the cutting path automatically produces one more significant advantage: accurate set-up of a part on a machine is no longer critical. The method has applications in the repair of airseals, frames and cases, and airfoils.© 1994 ASME
Zev Galel - One of the best experts on this subject based on the ideXlab platform.
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Laser Guidance for Repairing Gas Turbine Parts
Journal of Engineering for Gas Turbines and Power, 1995Co-Authors: Zev Galel, James L. Hunt, Thomas H. UngerAbstract:As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in jet engine repairs. Similar to a terrain-following cruise missile, a laser-guided cutter is used to follow a selected Datum Surface. For example, in the case of Honeycomb Airseals, the thin laser beam penetrates the honeycomb cell structure to follow the base metal. The method minimizes parent metal removal and under-minimum-wall condition. As a result, life potential of parts is extended, and repair costs are reduced. The ability to track a moving part and modify the cutting path automatically produces one more significant advantage : Accurate setup of a part on a machine is no longer critical. The method has applications in the repair of airseals, frames and cases, and airfoils.
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Laser Guidance for Repairing Gas Turbine Parts
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls Diagnostics and Instrumentation; Education; General, 1994Co-Authors: Zev Galel, James L. Hunt, Thomas H. UngerAbstract:As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in Jet Engine repairs. Similar to a terrain-following cruise missile, a laser guided cutter is used to follow a selected Datum Surface. For example, in the case of Honeycomb Airseals, the thin laser beam penetrates through the honeycomb cell structure to follow the base metal. The method minimizes parent metal removal and under-minimum-wall condition. As a result, life potential of parts is extended, and repair costs are reduced. The ability to track a moving part and modify the cutting path automatically produces one more significant advantage: accurate set-up of a part on a machine is no longer critical. The method has applications in the repair of airseals, frames and cases, and airfoils.© 1994 ASME
James L. Hunt - One of the best experts on this subject based on the ideXlab platform.
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Laser Guidance for Repairing Gas Turbine Parts
Journal of Engineering for Gas Turbines and Power, 1995Co-Authors: Zev Galel, James L. Hunt, Thomas H. UngerAbstract:As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in jet engine repairs. Similar to a terrain-following cruise missile, a laser-guided cutter is used to follow a selected Datum Surface. For example, in the case of Honeycomb Airseals, the thin laser beam penetrates the honeycomb cell structure to follow the base metal. The method minimizes parent metal removal and under-minimum-wall condition. As a result, life potential of parts is extended, and repair costs are reduced. The ability to track a moving part and modify the cutting path automatically produces one more significant advantage : Accurate setup of a part on a machine is no longer critical. The method has applications in the repair of airseals, frames and cases, and airfoils.
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Laser Guidance for Repairing Gas Turbine Parts
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls Diagnostics and Instrumentation; Education; General, 1994Co-Authors: Zev Galel, James L. Hunt, Thomas H. UngerAbstract:As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in Jet Engine repairs. Similar to a terrain-following cruise missile, a laser guided cutter is used to follow a selected Datum Surface. For example, in the case of Honeycomb Airseals, the thin laser beam penetrates through the honeycomb cell structure to follow the base metal. The method minimizes parent metal removal and under-minimum-wall condition. As a result, life potential of parts is extended, and repair costs are reduced. The ability to track a moving part and modify the cutting path automatically produces one more significant advantage: accurate set-up of a part on a machine is no longer critical. The method has applications in the repair of airseals, frames and cases, and airfoils.© 1994 ASME
Li Jie - One of the best experts on this subject based on the ideXlab platform.
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Selection of the Seamless Vertical-Datum Surface of Chinese Sea Area
Coastal Engineering, 2010Co-Authors: Li JieAbstract:The definitions of ellipsoid,geoid,mean sea level,and chart Datum are introduced.The reasons for the tidal Datum and the geoid being unsuitable as the seamless vertical Datum are analyzed systematically.Also the rationality and feasibility for using ellipsoid as seamless vertical Datum are analyzed.It is recommended to choose the WGS84 ellipsoid as the seamless vertical Datum of Chinese sea area.
Scott L. Wing - One of the best experts on this subject based on the ideXlab platform.
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History and causes of post-Laramide relief in the Rocky Mountain orogenic plateau
Geological Society of America Bulletin, 2006Co-Authors: Margaret E. Mcmillan, Paul L. Heller, Scott L. WingAbstract:The Rocky Mountain orogenic plateau has the highest mean elevation and topographic relief in the contiguous United States. The mean altitude exceeds 2 km above sea level and relief increases from 30 m in the river valleys of the Great Plains to more than 1.6 km deep in the canyons and basins of the Rocky Mountains and Colorado Plateau. Despite over a century of study, the timing and causes of elevation gain and incision in the region are unclear. Post-Laramide development of relief is thought to either result from tectonic activity or climatic change. Interpretation of which of these causes dominated is based upon reconstruction of Datums developed from, and supported by, paleoelevation proxies and interpretations of landscape incision. Here we reconstruct a Datum Surface against which regional incision can be measured in order to evaluate late Cenozoic tectonic and climatic infl uences. The distribution, magnitude, and timing of post-Laramide basin fi lling and subsequent erosion are constrained by depositional remnants, topographic markers, and other indicators across the region. We suggest that post-Laramide basin fi lling resulted from slow subsidence during Oligocene to Miocene time. Incision into this basin fi ll Surface began in late Miocene time and continues today. The pattern of incision is consistent with control by localized extensional tectonism superimposed upon regional domal Surface uplift. Localized extension is associated with the projection of the Rio Grande Rift into the central Rockies, and the domal uplift generally coincides with the position of buoyant mantle anomalies interpreted at depth. If the magnitudes of incision directly refl ect magnitudes of Surface elevation gain, they are less than can be resolved by existing paleoelevation proxy methods. In addition, the combination of post-Laramide subsidence followed by regional Surface uplift reduces the net magnitude of Surface elevation change since Laramide time.
