https://puma.ub.uni-stuttgart.de/tag/Variation%20Process%20processPUMA RSS feed for /tag/Variation%20Process%20process2026-04-24T01:55:56+02:00https://puma.ub.uni-stuttgart.de/bibtex/2151deb6e49472c757ef90140600c26f0/isw-bibliothekisw-bibliothek2016-03-03T09:53:12+01:00ISW Process chatter control myown online speed spindle stability variation xfh xvl <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jens Friedrich" itemprop="url" href="/person/163a5086d74f022b9353f2d51bec4ebd1/author/0"><span itemprop="name">J. Friedrich</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexander Verl" itemprop="url" href="/person/163a5086d74f022b9353f2d51bec4ebd1/author/1"><span itemprop="name">A. Verl</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of the 22nd International Conference on Production Research</span>, </em></span><em>page <span itemprop="pagination">--</span>. </em>(<em><span>2013<meta content="2013" itemprop="datePublished"/></span></em>)</span>Thu Mar 03 09:53:12 CET 2016Proceedings of the 22nd International Conference on Production Research--Adaptive spindle speed variation to improve process stability2013ISW Process chatter control myown online speed spindle stability variation xfh xvl A limiting factor of the performance of machine tools is the dynamic processbehavior. Suppression of chatter is still an important measure to increaseproductivity. Spindle speed variation is a known possibility to reduce chattervibrations without changes to the machine tool using the degree-of-freedom ofthe spindle speed. In this paper the new adaptive spindle speed variation(ASSV) method is presented. The ASSV algorithm automatically adapts theamplitude and the frequency of the spindle speed variation due to the currentprocess stability conditions taking into account the machine capability andthe process technology. A simulation model of the milling process is used toanalyze and verify the functionality of the ASSV. With just using a simple P-or PI-controller in combination with the ASSV algorithm the depth of cut andthus the productivity can be increased to 150% in comparison to cutting withconstant spindle speed with respect to the displacement of the tool tip.https://puma.ub.uni-stuttgart.de/bibtex/21d105d031e70665b4d9de4fe83af6da5/isw-bibliothekisw-bibliothek2016-03-03T09:53:12+01:00ISW chatter control milling myown process speed spindle stability variation xfh xvl <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jens Friedrich" itemprop="url" href="/person/10a93c816d409441a17251befe7ebb7bf/author/0"><span itemprop="name">J. Friedrich</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexander Verl" itemprop="url" href="/person/10a93c816d409441a17251befe7ebb7bf/author/1"><span itemprop="name">A. Verl</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of the International Conference on Advanced Manufacturing Engineering and Technologies NEWTECH 2013</span>, </em></span><em>page <span itemprop="pagination">117-126</span>. </em>(<em><span>2013<meta content="2013" itemprop="datePublished"/></span></em>)</span>Thu Mar 03 09:53:12 CET 2016Proceedings of the International Conference on Advanced Manufacturing Engineering and Technologies NEWTECH 2013 117-126In-process Control for Adaptive Spindle Speed Variation and Selection2013ISW chatter control milling myown process speed spindle stability variation xfh xvl The productivity of the milling process is limited by the cutting depth. Thecritical cutting depth varies for different spindle speeds. Unstable processescan be stabilized by varying the spindle speed. This paper presents a newapproach to stabilize the process by using adaptive spindle speed variationand selection (ASSV/ASSS). Based on the current cutting conditions theparameters of the ASSV are calculated by an in-process feedback controller tostabilize the process. In parallel a new stable spindle speed for the cuttingdepth is derived and selected (ASSS). Even if there exists no stable spindlespeed for the cutting depth, the ASSV stabilizes the process. The results areverified with simulations and with experiments on a commercial millingmachine. The application of ASSV/ASSS increases the stable cutting depth andthus the productivity with constant speed by 233% and reduces the displacementof the tool tip by the factor of 10.