Patents by Inventor Eric Fromerth
Eric Fromerth has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230241741Abstract: Feed rate scheduling methods include measuring a topography of a grinding wheel of a machine tool, calculating a topography parameter using the topography, and calculating a feed rate scheduling parameter for a toolpath of the grinding wheel based on the topography parameter. The topography may be measured using microscopy. The topography parameter may include a plurality of parameters including a density of crystals at a given depth (C(h)) of the grinding wheel and/or an area fraction of crystals protruding at a given depth (?(h)) of the grinding wheel. The feed rate scheduling parameter may include a grinding wheel feed rate, a grinding wheel spin rate, and/or a grinding wheel cutting depth, among other parameters.Type: ApplicationFiled: January 3, 2023Publication date: August 3, 2023Applicant: RAYTHEON TECHNOLOGIES CORPORATIONInventors: RAJA KRISHNAN KOUNTANYA, ERIC FROMERTH, DONALD J. LECLERC, III, DEMETRIOS KOUKOUVES, CHANGSHENG GUO, ALEX JAMES SARDO
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Publication number: 20230241739Abstract: A feed rate scheduling method may comprise: receiving an engagement geometry of a subtractive component for use in a computer numerical control (CNC) machining process; receiving a tool path for forming a component from a workpiece via the CNC machining process; calculating a plurality of bending moments of a spindle at various intervals along the tool path; and determining a feed rate schedule for the tool path of the subtractive component based on the plurality of bending moment.Type: ApplicationFiled: January 3, 2023Publication date: August 3, 2023Applicant: RAYTHEON TECHNOLOGIES CORPORATIONInventors: RAJA KRISHNAN KOUNTANYA, ERIC FROMERTH, CHANGSHENG GUO
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Patent number: 11090772Abstract: A method and apparatus for machining parts with variable stiffness includes determining, by a controller, a chatter-lobe plot of a cutter assembly. A preliminary tool path is developed by the controller. Virtual machining of a blank part using the preliminary tool path is performed by the controller. A chatter-lobe plot of the virtually machined part is determined by the controller. A dynamic chatter-lobe plot using the chatter-lobe plot of the cutting tool assembly and the chatter-lobe plot of the virtually machined part is determined by the controller. A chatter-free rotational speed of the cutting tool from the dynamic chatter-lobe plot is determined by the controller. A machining apparatus, controlled by the controller, uses the determined chatter-free rotational speed of the cutting tool to machine a blank part.Type: GrantFiled: January 2, 2019Date of Patent: August 17, 2021Assignee: Raytheon Technologies CorporationInventors: Changsheng Guo, Zhigang Wang, Eric Fromerth
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Patent number: 10913122Abstract: A forming tool for forming leading edges of turbine blades is disclosed. In various embodiments, a forming tool may comprise a cylindrically-shaped body having a notch around the circumference of the cylindrically-shaped body. The notch may be positioned perpendicularly to a center axis of the cylindrically-shaped body. Further, the notch may have a notch contour with an upper notch contour and a lower notch contour, and where the notch contour is a relief of a selected turbine blade leading edge. The forming tool may be a grinding tool or a cutting tool. Moreover, a forming process may comprise forming, by a forming tool, a first portion of a turbine blade leading edge with a rough edge result, and forming, by a milling cutter, a second portion of the turbine blade leading edge with a rough edge result.Type: GrantFiled: December 3, 2018Date of Patent: February 9, 2021Assignee: Raytheon Technologies CorporationInventors: Eric Fromerth, Daniel J Wright, Chung Y. Wu
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Publication number: 20200206851Abstract: A method and apparatus for machining parts with variable stiffness includes determining, by a controller, a chatter-lobe plot of a cutter assembly. A preliminary tool path is developed by the controller. Virtual machining of a blank part using the preliminary tool path is performed by the controller. A chatter-lobe plot of the virtually machined part is determined by the controller. A dynamic chatter-lobe plot using the chatter-lobe plot of the cutting tool assembly and the chatter-lobe plot of the virtually machined part is determined by the controller. A chatter-free rotational speed of the cutting tool from the dynamic chatter-lobe plot is determined by the controller. A machining apparatus, controlled by the controller, uses the determined chatter-free rotational speed of the cutting tool to machine a blank part.Type: ApplicationFiled: January 2, 2019Publication date: July 2, 2020Inventors: Changsheng Guo, Zhigang Wang, Eric Fromerth
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Publication number: 20190099815Abstract: A forming tool for forming leading edges of turbine blades is disclosed. In various embodiments, a forming tool may comprise a cylindrically-shaped body having a notch around the circumference of the cylindrically-shaped body. The notch may be positioned perpendicularly to a center axis of the cylindrically-shaped body. Further, the notch may have a notch contour with an upper notch contour and a lower notch contour, and where the notch contour is a relief of a selected turbine blade leading edge. The forming tool may be a grinding tool or a cutting tool. Moreover, a forming process may comprise forming, by a forming tool, a first portion of a turbine blade leading edge with a rough edge result, and forming, by a milling cutter, a second portion of the turbine blade leading edge with a rough edge result.Type: ApplicationFiled: December 3, 2018Publication date: April 4, 2019Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Eric Fromerth, Daniel J Wright, Chung Y. Wu
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Patent number: 10173273Abstract: A forming tool for forming leading edges of turbine blades is disclosed. In various embodiments, a forming tool may comprise a cylindrically-shaped body having a notch around the circumference of the cylindrically-shaped body. The notch may be positioned perpendicularly to a center axis of the cylindrically-shaped body. Further, the notch may have a notch contour with an upper notch contour and a lower notch contour, and where the notch contour is a relief of a selected turbine blade leading edge. The forming tool may be a grinding tool or a cutting tool. Moreover, a forming process may comprise forming, by a forming tool, a first portion of a turbine blade leading edge with a rough edge result, and forming, by a milling cutter, a second portion of the turbine blade leading edge with a rough edge result.Type: GrantFiled: January 22, 2015Date of Patent: January 8, 2019Assignee: United Technologies CorporationInventors: Eric Fromerth, Daniel J. Wright, Chung Y. Wu
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Publication number: 20160332239Abstract: A forming tool for forming leading edges of turbine blades is disclosed. In various embodiments, a forming tool may comprise a cylindrically-shaped body having a notch around the circumference of the cylindrically-shaped body. The notch may be positioned perpendicularly to a center axis of the cylindrically-shaped body. Further, the notch may have a notch contour with an upper notch contour and a lower notch contour, and where the notch contour is a relief of a selected turbine blade leading edge. The forming tool may be a grinding tool or a cutting tool. Moreover, a forming process may comprise forming, by a forming tool, a first portion of a turbine blade leading edge with a rough edge result, and forming, by a milling cutter, a second portion of the turbine blade leading edge with a rough edge result.Type: ApplicationFiled: January 22, 2015Publication date: November 17, 2016Applicant: United Technologies CorporationInventors: Eric Fromerth, Daniel J. Wright, Chung Y. Wu
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Publication number: 20160207116Abstract: A method of machining includes mounting a part to a rotatable chuck of a lathe. A tool is then installed into the lathe. The tool is swung along an arcuate pathway to pass the tool through a smaller diameter area of the part to a larger diameter area of the part. The part is inserted into a cavity of the part. The part is then rotated and material is machine from the part.Type: ApplicationFiled: January 20, 2015Publication date: July 21, 2016Inventors: Eric Fromerth, Michael A. Czywczynski, Dennis R. Mcguire, Richard W. Rosborough
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Publication number: 20100042244Abstract: A method of designing a tool for forming a rotor blade including an airfoil portion includes generating a computer model of a rotor blade having an airfoil portion, and determining a curvature and radius of curvature at sections of the rotor blade. An inner and outer diameter of a circumferential forming portion of a tool operable to form the rotor blade may then be calculated. A method of designing a tool path for forming a rotor blade including an airfoil portion includes generating a computer model of a cylindrical tool operable to form a rotor blade including an airfoil portion and of a rotor having a plurality of the rotor blades. The computer models of the rotor and tool are used to generate a first and second tool motion corresponding to airfoil suction and pressure portions. A method of forming a rotor with integral blades is also disclosed.Type: ApplicationFiled: October 22, 2009Publication date: February 18, 2010Inventors: Tahany Ibrahim El-Wardany, Changsheng Guo, Daniel V. Viens, Eric Fromerth, Lienjing Chen
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Publication number: 20090028714Abstract: A method of designing a tool for forming a rotor blade including an airfoil portion includes generating a computer model of a rotor blade having an airfoil portion, and determining a curvature and radius of curvature at sections of the rotor blade. An inner and outer diameter of a circumferential forming portion of a tool operable to form the rotor blade may then be calculated. A method of designing a tool path for forming a rotor blade including an airfoil portion includes generating a computer model of a cylindrical tool operable to form a rotor blade including an airfoil portion and of a rotor having a plurality of the rotor blades. The computer models of the rotor and tool are used to generate a first and second tool motion corresponding to airfoil suction and pressure portions. A method of forming a rotor with integral blades is also disclosed.Type: ApplicationFiled: July 25, 2007Publication date: January 29, 2009Inventors: Tahany Ibrahim El-Wardany, Changsheng Guo, Daniel V. Viens, Eric Fromerth, Lienjing Chen