{"1d105d031e70665b4d9de4fe83af6da5isw-bibliothek":{"DOI":"","ISBN":"","ISSN":"","URL":"http://www.diva-portal.org/smash/get/diva2:660817/FULLTEXT08.pdf#page=117","abstract":"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.","annote":"","author":[{"family":"Friedrich","given":"Jens"},{"family":"Verl","given":"Alexander"}],"citation-label":"JensFriedrich2013","collection-editor":[],"collection-title":"","container-author":[],"container-title":"Proceedings of the International Conference on   Advanced Manufacturing Engineering and Technologies   NEWTECH 2013","documents":[],"edition":"","editor":[],"event-date":{"date-parts":[["2013"]],"literal":"2013"},"event-place":"","id":"1d105d031e70665b4d9de4fe83af6da5isw-bibliothek","interhash":"0a93c816d409441a17251befe7ebb7bf","intrahash":"1d105d031e70665b4d9de4fe83af6da5","issue":"","issued":{"date-parts":[["2013"]],"literal":"2013"},"keyword":"myown process chatter xfh control spindle xvl ISW milling speed stability variation","misc":{"__markedentry":"[xtl:6]"},"note":"","number":"","number-of-pages":"9","page":"117-126","page-first":"117","publisher":"","publisher-place":"","status":"","title":"In-process Control for Adaptive Spindle Speed Variation and Selection","type":"paper-conference","username":"isw-bibliothek","version":"","volume":""},"151deb6e49472c757ef90140600c26f0isw-bibliothek":{"DOI":"","ISBN":"","ISSN":"","URL":"","abstract":"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.","annote":"","author":[{"family":"Friedrich","given":"Jens"},{"family":"Verl","given":"Alexander"}],"citation-label":"FriedrichVerl2013","collection-editor":[],"collection-title":"","container-author":[],"container-title":"Proceedings of the 22nd International Conference on Production Research","documents":[],"edition":"","editor":[],"event-date":{"date-parts":[["2013"]],"literal":"2013"},"event-place":"","id":"151deb6e49472c757ef90140600c26f0isw-bibliothek","interhash":"63a5086d74f022b9353f2d51bec4ebd1","intrahash":"151deb6e49472c757ef90140600c26f0","issue":"","issued":{"date-parts":[["2013"]],"literal":"2013"},"keyword":"myown chatter online xfh Process control spindle xvl ISW speed stability variation","misc":{"__markedentry":"[xtl:6]"},"note":"","number":"","page":"--","page-first":"","publisher":"","publisher-place":"","status":"","title":"Adaptive spindle speed variation to improve process stability","type":"paper-conference","username":"isw-bibliothek","version":"","volume":""}}