Results 241 to 250 of about 76,744 (301)

Workpiece Measurement Device—Workpiece Height Classification

2020
With Industry 4.0 taking over the facilities and machine vision is ubiquitous, legacy machines fall behind and become unnecessary burden, while still being able to operate and produce for years to come. This paper presents prototype of one of the devices that will enable legacy machines to catch up with inevitable changes.
Ermin Podrug, Slobodan Lubura
openaire   +1 more source

Virtual workpiece: workpiece representation for material removal process

The International Journal of Advanced Manufacturing Technology, 2011
In this paper, an efficient methodology to generate a virtual workpiece (VWP) is presented. VWP is a workpiece in a virtual environment in which the geometric, kinematic, and thermo-mechanical effects of the process and resources can be reflected. VWP encompasses not only the macro-information corresponding to the shape of the “virtually” machined ...
Seok Won Lee, Andreas Nestler
openaire   +1 more source

Geometric algorithms for workpiece localization

IEEE Transactions on Robotics and Automation, 1998
We present a unified geometric theory for localization of three types of workpieces: 1) general three-dimensional (3D) workpieces where points from the finished surfaces fully constrain the rigid motions of the workpieces; 2) symmetric workpieces; 3) partially machined workpieces where points from the finished surfaces are inadequate to fully constrain
Zexiang Li 0001, Jianbo Gou, Yunxian Chu
openaire   +2 more sources

Process parallel simulation of workpiece temperatures using sensory workpieces

CIRP Journal of Manufacturing Science and Technology, 2018
Abstract Process induced heat causes workpiece shape deviations during machining and may result in rejected parts. As unpredictable processing and boundary conditions cannot be simulated in the process planning phase, a process parallel simulation of the workpiece temperature is required to observe and compensate thermal effects.
Berend Denkena, Marc-André Dittrich, Florian Uhlich, Marcel Wichmann, Markus Mücke   +4 more
openaire   +1 more source

Error compensation of workpiece localization

Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164), 2002
Workpiece localization has direct relations with many manufacturing automation applications. In order to gain accurate workpiece measurement by coordinate measuring machines (CMM) or on-machine measurement system, the touch trigger probe is widely adopted.
Zhenhua Xiong, Zexiang Li 0001
openaire   +1 more source

Orthogonal Microcutting of Thin Workpieces

Journal of Manufacturing Science and Engineering, 2013
With a broader intention of producing thin sheet embossing molds, orthogonal cutting experiments of thin workpieces are conducted. Challenges in machining thin workpieces are many: machining induced stress and deformation, fixturing challenges, and substrate effects.
Kushendarsyah, Saptaji, Sathyan, Subbiah
openaire   +2 more sources

An algebraic algorithm for workpiece localization

Proceedings of IEEE International Conference on Robotics and Automation, 2002
Presents an algebraic algorithm for workpiece localization. First, we formulate the problem as a least-square problem in the configuration space Q=SE(3)/spl times/R/sup 3n/, where SE(3) is the Euclidean group, and n is the number of measurement points to be matched by corresponding home surface points of the workpiece.
Xiaomin Li, Maurice Yeung, Zexiang Li 0001   +2 more
openaire   +1 more source

Tolerance Control in Workpiece Fixturing

Volume 4: 4th Design for Manufacturing Conference, 1999
Abstract When designing parts with tight tolerances, care must be paid to ensure that specified accuracy can be yielded despite manufacturing deviations. An issue to be considered is how deviations on datum elements propagate on toleranced features, taking into account configuration of locating fixtures used in manufacturing set-ups. The
ARMILLOTTA, ANTONIO, BIGGIOGGERO G. F., SEMERARO, QUIRICO, MORONI, GIOVANNI, POLINI, WILMA   +4 more
openaire   +3 more sources

Stable Workpiece Fixturing

20th Design Automation Conference: Volume 2 — Robust Design Applications; Decomposition and Design Optimization; Optimization Tools and Applications, 1994
Abstract In this paper, we present the spatial and planar force-displacement relationships which characterize individual contacts on a fixtured workpiece. The compliance at each contact is modeled and expressions for the changes in contact forces as a function of the rigid body relative motion between the fixture elements and the ...
Joseph P. Donoghue, W. Stamps Howard, Vijay Kumar   +2 more
openaire   +1 more source

The Workpiece Material in Machining

The International Journal of Advanced Manufacturing Technology, 1999
From forming operations, it is known that the fracture strain under different stress conditions can be predicted by using ductility curves. These curves can be determined easily by two simple material tests. It will be shown that these curves can also be used to understand chip breaking.
J. H. Dautzenberg, S. P. F. C. Jaspers, D. A. Taminiau   +2 more
openaire   +1 more source