Expert Details
Machine Tools, Semiconductor Process Equipment, Machine Dynamics, Metrology
ID: 108076
Pennsylvania, USA
Expert's government- and industry-sponsored work in regenerative chatter has led to new models in machine tools, including generalization of the classic orthogonal cutting model to other tool geometries. Exhaustive experimental investigation has been used to verify analytical models. His ongoing research is currently expanding the understanding of chatter in grinding, which has received much less attention from past research. At present, Expert is heavily involved with machine tool builders seeking to develop machine designs capable of heavy cutting and grinding without experiencing chatter. His recent projects include machining centers, cylindrical and centerless grinders, and wafer polishing machines.
Understanding that machine vibration arises from a variety of sources, Expert has studied rotating imbalance, high-speed actuation, pump vibration, and others. His experience in machine vibration also includes measuring and interpreting these vibrations. He has measured particular vibration characteristics with sensors such as accelerometers and capacitance gages. He has designed solutions such as damping treatments, structural reinforcement, and proper balancing.
Modal analysis is a power method of identifying the characteristics of a structure. The results of an analytical (FEA) or experimental modal analysis may be used to improve the dynamic characteristics of a structural design. Expert's experience with modal analysis has been primarily aimed at identifying the key dynamic characteristics of a particular structure and working towards improvement. Examples of his work include the redesign of machine tool structures with increased damping and stiffness, understanding the structural problems of the individual semiconductor process equipment, and measuring the characteristics of different prototypes to create a better final design.
Modal analysis is a power method of identifying the characteristics of a structure. The results of an analytical (FEA) or experimental modal analysis may be used to improve the dynamic characteristics of a structural design. Expert's experience with modal analysis has been primarily aimed at identifying the key dynamic characteristics of a particular structure and working towards improvement. Examples of his work include the redesign of machine tool structures with increased damping and stiffness, understanding the structural problems of the individual semiconductor process equipment, and measuring the characteristics of different prototypes to create a better final design.
Expert's consulting experience involves dozens of companies in the semiconductor and machine tool industries. Most of his engagements lead to the solution of a vibration-related problem or a structural dynamics issue. The solutions have led to numerous designs that are now in production. A typical scenario involves collecting vibration data followed by analyzing the problem and designing a solution in cooperation with the machine's builder.
Education
Year | Degree | Subject | Institution |
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Year: 1994 | Degree: Ph.D. | Subject: Mechanical Engineering | Institution: Massachusetts Institute ofTechnology |
Year: 1992 | Degree: M.S. | Subject: Mechanical Engineering | Institution: Massachusetts Institute ofTechnology |
Year: 1990 | Degree: B.S. | Subject: Mechanical Engineering | Institution: University of Illinois-Urbana-Champaign |
Work History
Years | Employer | Title | Department |
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Years: 1994 to Present | Employer: Undisclosed | Title: Associate Professor | Department: Mechanical Engineering |
Responsibilities:Available upon request. |
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Years | Employer | Title | Department |
Years: 1990 to Present | Employer: Undisclosed | Title: Independent Engineering Consultant | Department: |
Responsibilities:Available upon request. |
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Years | Employer | Title | Department |
Years: 1992 to 1994 | Employer: Massachusetts Institute of Technology | Title: Research Assistant | Department: Precision Engineering Research Center |
Responsibilities:Available upon request. |
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Years | Employer | Title | Department |
Years: 1990 to 1992 | Employer: Massachusetts Institute of Technology | Title: Research Assistant | Department: Martin Center for Engineering Design |
Responsibilities:Available upon request. |
Career Accomplishments
Associations / Societies |
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Expert is a member of the American Society of Precision Engineers and the American Society of Mechanical Engineers. |
Awards / Recognition |
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The recipient of a variety of honors, Expert won a R&D 100 Award, MIT's Carl T. Sontheimer Award, the National Tool Builders Association Scholarship, the ASME Scholarship, the General Motors Scholarship, and the A.G. Friedrich Memorial Award. |
Publications and Patents Summary |
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He holds a U.S. patent for shear damping of machine tool structures. |
Fields of Expertise
finite element analysis, chatter, machine vibration, modal analysis, machine vibration analysis, regenerative vibration, vibration damping, material damping property, machine-tool industry, vibration sensor, viscous damping, diamond tooling, vibration detection, grinding equipment, precision machine tool, machinery foundation, finite element modeling, vibration modal analysis, high-speed spindle, vibration measurement, grinding (machining), machine-tool design, precision machine design, grinding machine, structural analysis, mechanical system vibration, damping, vibration testing, structural vibration, vibration pickup, vibration modeling, vibration, precision engineering, machine tool, lathe, damping capacity