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Vernon Hills, IL, United States

Fan Z.,University of Connecticut | Ng M.-K.,Northwestern University | Gao R.X.,University of Connecticut | Cao J.,Northwestern University | Smith III E.F.,Deringer-Ney Inc.
CIRP Annals - Manufacturing Technology | Year: 2012

The temporal and spatial distributions of pressure across the roll-workpiece interface during the micro- form-rolling process are critical indicators for the quality of the formed textures. This paper presents a novel method for monitoring the pressure distribution through a set of capacitive sensors embedded within the roll. Numerical and analytical models of the sensor-embedded roll have been established for determining the optimal sensor dimension to maximize the capacitance output in the pico-Farad range, under space constraint. A transfer function of the sensor is established for retrieving the pressure distribution. The technique is evaluated by simulation and confirmed through experiments. © 2012 CIRP. Source

Fan Z.,University of Connecticut | Zou X.,University of Connecticut | Gao R.X.,University of Connecticut | Ng M.-K.,Northwestern University | And 2 more authors.
IEEE/ASME Transactions on Mechatronics | Year: 2015

This paper presents the design, characterization, and experimental evaluation of a wireless capacitive pressure sensor embedded within a rotating workroll of a microrolling machine for monitoring the production of micrometer-scaled texture on thin metallic workpiece. The sensor converts the spatial and temporal variations of pressure across the interface between the roll and workpiece into capacitance values, thereby experimentally establishing a quantitative correlation between the online measurement and the geometric features being formed on the workpiece, in real time. Analytical and numerical models have been developed to guide the design of the sensor to maximize the capacitance output while satisfying the space constraint. A sensitivity matrix linking the measured capacitance with pressure distribution has been established through numerical analysis. Simulation and experiments confirmed the effectiveness of the embedded sensor in enabling intelligent microrolling. © 1996-2012 IEEE. Source

Ng M.-K.,Northwestern University | Fan Z.,University of Connecticut | Gao R.X.,University of Connecticut | Smith III E.F.,Deringer-Ney Inc. | Cao J.,Northwestern University
CIRP Annals - Manufacturing Technology | Year: 2014

Electrically-assisted micro-rolling (EAμR) takes advantage of localized heating by loading current through the deformation zone to enhance the texturing capability of Ti-6Al-4V and AA3003-H14. The challenge to achieve a desired deformation pattern is the lack of reliable models to capture the often non-uniform mechanical and thermal behaviors. In this paper, pressure distributions are measured by a custom-designed, tool-embedded sensor. Furthermore, the effects of current on texturing are first characterized using a coupled mechanical and thermal model. Comparison between modeling and experimental results confirmed the effectiveness of EAμR on texturing and the importance of multi-physics modeling. © 2014 CIRP. Source

Ng M.-K.,Northwestern University | Li L.,Northwestern University | Li L.,Xian Shiyou University | Fan Z.,University of Connecticut | And 4 more authors.
CIRP Annals - Manufacturing Technology | Year: 2015

Roll bonding is a solid-state welding process performed by means of rolling. During the process, virgin metal is extruded to the surface from underneath the surface through micro cracks leading to the formation of new metallic bonds. Electrically-assisted roll bonding (EARB) was applied to roll bond 127 μm aluminum sheet to 127 μm aluminum or copper sheets. The quality of the bonds was examined through micrographs and peel tests. It was found that the Joule heating effect in EARB lowered rolling forces and increased the bond strengths of bonded sheets by as much as three times. © 2015 CIRP. Source

Deringer-Ney Inc. | Date: 2014-04-17

Apparatuses and methods for fuel level sensing use a rotatable housing, an interior arm suspended on an axle within the housing, a counterweight joined to one end of the interior arm and a position sensor with first and second sensor elements. The sensor elements are arranged within the housing with one of the sensor elements is joined to an interior wall of the housing and the other joined to the interior arm such that the sensor elements are rotatable relative to one another. An exterior arm joined to an exterior of the housing is adapted to accommodate a float. The exterior arm slaves the rotatable housing in rotation about a rotational axis, and relative rotation of the first and second sensor elements may cause a change in a sensor output of the position sensor.

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