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).

  • Publication number: 20230241741
    Abstract: 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: Application
    Filed: January 3, 2023
    Publication date: August 3, 2023
    Applicant: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: RAJA KRISHNAN KOUNTANYA, ERIC FROMERTH, DONALD J. LECLERC, III, DEMETRIOS KOUKOUVES, CHANGSHENG GUO, ALEX JAMES SARDO
  • Publication number: 20230241739
    Abstract: 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: Application
    Filed: January 3, 2023
    Publication date: August 3, 2023
    Applicant: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: RAJA KRISHNAN KOUNTANYA, ERIC FROMERTH, CHANGSHENG GUO
  • Patent number: 11090772
    Abstract: 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: Grant
    Filed: January 2, 2019
    Date of Patent: August 17, 2021
    Assignee: Raytheon Technologies Corporation
    Inventors: Changsheng Guo, Zhigang Wang, Eric Fromerth
  • Patent number: 10913122
    Abstract: 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: Grant
    Filed: December 3, 2018
    Date of Patent: February 9, 2021
    Assignee: Raytheon Technologies Corporation
    Inventors: Eric Fromerth, Daniel J Wright, Chung Y. Wu
  • Publication number: 20200206851
    Abstract: 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: Application
    Filed: January 2, 2019
    Publication date: July 2, 2020
    Inventors: Changsheng Guo, Zhigang Wang, Eric Fromerth
  • Publication number: 20190099815
    Abstract: 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: Application
    Filed: December 3, 2018
    Publication date: April 4, 2019
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Eric Fromerth, Daniel J Wright, Chung Y. Wu
  • Patent number: 10173273
    Abstract: 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: Grant
    Filed: January 22, 2015
    Date of Patent: January 8, 2019
    Assignee: United Technologies Corporation
    Inventors: Eric Fromerth, Daniel J. Wright, Chung Y. Wu
  • Publication number: 20160332239
    Abstract: 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: Application
    Filed: January 22, 2015
    Publication date: November 17, 2016
    Applicant: United Technologies Corporation
    Inventors: Eric Fromerth, Daniel J. Wright, Chung Y. Wu
  • Publication number: 20160207116
    Abstract: 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: Application
    Filed: January 20, 2015
    Publication date: July 21, 2016
    Inventors: Eric Fromerth, Michael A. Czywczynski, Dennis R. Mcguire, Richard W. Rosborough
  • Publication number: 20100042244
    Abstract: 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: Application
    Filed: October 22, 2009
    Publication date: February 18, 2010
    Inventors: Tahany Ibrahim El-Wardany, Changsheng Guo, Daniel V. Viens, Eric Fromerth, Lienjing Chen
  • Publication number: 20090028714
    Abstract: 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: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Inventors: Tahany Ibrahim El-Wardany, Changsheng Guo, Daniel V. Viens, Eric Fromerth, Lienjing Chen