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This paper addresses the control of a tool developed to superimpose vibrations along several directions on a piece during forging. Piezoelectric actuators are used to provide the required forces and speeds. Due to the minute displacements of the actuators, flexible hinges are used in a special arrangement in order realize the specified movements and to(More)
To develop Net Shape parts by forging, process planing must take design, production, heat treatment and control difficulties into account the earliest it's possible. In this perspective, we propose to present an aspect of our work, made in collaboration with an industry, which deals with the dimensional control of the functionality of forged straight bevel(More)
This paper presents the modeling of forging processes assisted by vibrations. A piezoelectric actuator is used to generate specific low-frequency vibration waveforms superimposed to the forging motion. Experimental results show a reduction of the forging load during upsetting tests. However, the appropriate waveforms and their influence on the forging load(More)
is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.Progressive wave: a new multisource vibration technique to assist forming processes-kinematic study, simulation results and design proposition-2013 Abstract : Use of vibration in the forming process has(More)
During Friction Stir Welding process, FSW, a tool / workpiece mechanical interaction is generated leading to forces and torques applied on the tool. These forces and torques are transmitted to the welding equipment impacting its technical requirements. This paper presents a forces and torques analysis according to the processing parameters on the welding at(More)
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