Person:

Liang, Steven Y.

Permanent Link

https://hdl.handle.net/1853/71459

Associated Organization(s)

Organizational Unit

George W. Woodruff School of Mechanical Engineering

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Publication Search Results

Now showing 1 - 10 of 14

Prediction of Multi-Flute Machining Forces in Transient Cuts

(Georgia Institute of Technology, 1998-10-14) Li, Yawei ; Liang, Steven Y.
Dielectric monitoring of in-situ consolidation of thermoplastic filament winding

(Georgia Institute of Technology, 1994-01) Liang, Steven Y. ; Georgia Institute of Technology. Office of Sponsored Programs ; Georgia Institute of Technology. School of Mechanical Engineering
Analysis of Milling Forces via Angular Convolution

(Georgia Institute of Technology, 1991) Wang, J. - J. Junz ; Liang, Steven Y. ; Book, Wayne J. ; Georgia Institute of Technology. School of Mechanical Engineering ; Georgia Institute of Technology. Center for Robotics and Intelligent Machines

The measurement of cutting force systems is one of the most frequently used techniques for the monitoring of machining processes. Its wide spread application ranges from tool condition identification, feedback control, cutting system design, to process optimization. To gain fundamental understanding of the force system in machining, this paper presents the work of establishing a closed form expression for the cutting force in end milling as an explicit function of cutting parameters and tool/workpiece geometry. Based on the theoretical local cutting force model, the generation of total cutting forces is formulated as the angular convolution of three uncorrelated cutting process component functions, namely the elemental cutting force function, the chip width density function, and the tooth sequence function. The elemental cutting force function is related to the chip formation process in an elemental cutting area and it is characterized by the chip thickness variation, specific cutting pressure constants, and entry/exit angles. The chip width density function defines the chip width per unit cutter rotation along a cutter flute within the range of axial depth of cut as the function of the angular position of each cutting point. The tooth sequence function represents the spacing between flutes as well as their cutting sequence as the cutter rotates. The analysis of cutting forces is extended into the Fourier domain by taking the frequency multiplication of the transforms of the three component functions. Fourier series coefficients of the cutting forces are shown to be algebraic functions of various tool parameters and cutting conditions. Simulation results are presented in the frequency domain to illustrate the effects of process parameters. A series of end milling experiments are performed and their results discussed to validate the analytical model.
Modeling and measurement of process errors in micromilling

(Georgia Institute of Technology, 2010-01-15) Melkote, Shreyes N. ; Liang, Steven Y. ; Mathai, George ; Kumar, Mukund ; Marcon, Andrea ; Hsu, F.C. ; Chiu, C.C. ; Wang, J.J. ; Georgia Institute of Technology. Office of Sponsored Programs ; Georgia Institute of Technology. Manufacturing Research Center ; Georgia Institute of Technology. Office of Sponsored Programs
Predictive Modeling of Near Dry Machining

(Georgia Institute of Technology, 2006-03-15) Li, Kuan-Ming ; Liang, Steven Y.
Freeform optical systems for defense system optics - machinability

(Georgia Institute of Technology, 2007-08-31) Liang, Steven Y. ; Morehouse, John B. ; Georgia Institute of Technology. Office of Sponsored Programs ; Georgia Institute of Technology. Manufacturing Research Center ; Georgia Institute of Technology. Office of Sponsored Programs
Convolution Analysis of Milling Force Pulsation

(Georgia Institute of Technology, 1994-02) Wang, J.-J. Junz ; Liang, Steven Y. ; Book, Wayne J. ; Georgia Institute of Technology. School of Mechanical Engineering ; Georgia Institute of Technology. Center for Robotics and Intelligent Machines

This paper presents the establishment of a closed form expression for the dynamic forces as explicit functions of cutting parameters and tool/workpiece geometry in milling processes. Based on the existing local cutting force model, the generation of total cutting forces is formulated as the angular domain convolution of three cutting process component functions, namely the elementary cutting function, the chip width density function, and the tooth sequence function. The elemental cutting force function is related to the chip formation process in an elemental cutting area and it is characterized by the chip thickness variation, and radial cutting configuration. The chip width density function defines the chip width per unit cutter rotation along a cutter flute within the range of axial depth of cut_ The tooth sequence function represents the spacing between flutes as well as their cutting sequence as the cutter rotates. The analysis of cutting forces is extended into the Fourier domain by taking the frequency multiplication of the transforms of the three component functions. Fourier series coefficients of the cutting forces are shown to be explicit algebraic functions of various tool parameters and cutting conditions. Numerical simulation results are presented in the frequency domain to illustrate the effects of various process parameters. A series of end milling experiments are performed and their results discussed to validate the analytical model.
Ultra-high-speed micro-milling machine

(Georgia Institute of Technology, 2007-12-31) Morehouse, John B. ; Liang, Steven Y. ; Georgia Institute of Technology. Office of Sponsored Programs ; Georgia Institute of Technology. Manufacturing Research Center ; Georgia Institute of Technology. Office of Sponsored Programs
A Closed Form Frequency Domain Model for Tangential Cutting Force in Peripheral Milling

(Georgia Institute of Technology, 1992) Wang, J. - J. Junz ; Liang, Steven Y. ; Book, Wayne J. ; Georgia Institute of Technology. School of Mechanical Engineering ; Georgia Institute of Technology. Center for Robotics and Intelligent Machines

An approach to develop a closed form frequency domain model for the tangential cutting force and torque is presented for peripheral milling processes. Based on a mechanistic local cutting force model, the total tangential cutting force is shown to be of a convolution integral form. The convolution integrands are defined in the context of local cutting force function and cutter chip width density function. The latter is related to cutter geometry and axial depth of cut, nad the local cutting force function is determined by the radial cutting configuration. The convolution theorem of linear system theory is applied to obtain the Fourier transforms of total cutting force as the products of Fourier transforms of the elemental cutting and chip width density functions. Results are compared with other cutting force models reported.
Development of Micro-Scale Grinding System and Grinding Mechanics

(Georgia Institute of Technology, 2006-03-15) Park, Hyung-Wook ; Liang, Steven Y.