In this paper, we present a review of machine health managements for the smart factory. As the Industry 4.0 leads current factory automation and intelligent machines, the machine health management for diagnostic and prognostic purposes …
Publications
Study of Stress Intensity Factor on the Anisotropic Machining Behavior of Single Crystal Sapphire
The ductile–brittle transition was investigated based on material crystallography and stress intensity factor on the four distinctive planes of sapphire. Cutting forces were analyzed to explain the anisotropic transition characteristics. The projected stress on the …
Empirical Power Consumption Model for Rotational Axes in Machine Tools
A machine-based power consumption model was developed to cope with a wide variety of machine tool configurations. By focusing on machine components, power consumption can be measured readily and reconfigured per individual component. This research …
Energy Consumption Model for Additive-Subtractive Manufacturing Processes with Case Study
There has been a growing trend in industry towards the development of integrated manufacturing centers that combine several manufacturing processes, such as the mill-turn center. As additive manufacturing becomes a more widely adopted technology, combining …
Anisotropic Brittle-Ductile Transition of Monocrystalline Sapphire during Orthogonal Cutting and Nanoindentation Experiments
Single-crystal sapphire is utilized as a high-performance engineering material, especially in extreme and harsh environments. However, due to its extreme hardness and brittleness, the machinability of sapphire is still a challenge. By means of nanoindentation …
Power Consumption Assessment of Machine Tool Feed Drive Units
Numerous efforts have been made to assess and model the power consumption of machining process, which has led to many standards for energy labeling of machine tools. However, more investigation is required to improve the …
Effect of the Initial-Flaw on Crack Propagation in Two-Step Cutting of Monocrystalline Sapphire
Though superior multifunctional performances of sapphire, heavy surface/subsurface damage during the process limit applications of the material. Many efforts have been made to improve the machinability of the material, by utilizing the ductile-regime cutting. Here, …
Dry Ultra-Precision Machining of Tungsten Carbide with Patterned nano PCD Tool
Texturing on the rake face of the tool without the metal working fluid is a potential method to reduce the friction coefficient in ultra-precision machining of tungsten carbide (WC) with a diamond tool. Low friction …
An Analytical Model for Grinding Force Prediction in Ultra-Precision Machining of WC with PCD Micro Grinding Tool
Micro grinding with a poly crystalline diamond (PCD) tool is one of the promising approaches for fabricating a micro mold on difficult-to-cut materials. As the process can also achieve good surface integrity without additional finishing …
Simultaneous Geometric Error Identification of Rotary Axis and Tool Setting in an Ultra-Precision 5-axis Machine Tool using On-Machine Measurement
This paper presents a method to identify the position independent geometric errors of rotary axis and tool setting simultaneously using on-machine measurement. Reducing geometric errors of an ultra-precision five-axis machine tool is a key to …