The superposition of mechanical tool vibrations with frequencies in the ultrasonic range is an approach that enables a considerable reduction of forming forces. So far, however, the incomplete understanding of the detailed process behaviour constrains the technologies broad industrial application.<\/p>\n
The central purposes of this thesis are the identification of responsible mechanisms for the phenomenon of vibration-based softening and the investigation of the ultrasonic influence on material forming limits. Metallic materials of four different classes are tested: martensitic stainless steel X17CrNi16-2, mild steel S235JR, wrought aluminium AW-6082 T6 and cast aluminium AC-43400.\nApart from the known effect of vibration-induced force reduction, substantial specimen heating was recorded in a fundamental process analysis. In addition, a strongly altered forming behaviour was observed. Thermal softening and material-related influences have been identified as crucial mechanisms regarding force reduction. With respect to the forming limits of metallic materials under the influence of ultrasonic vibration, a significant reduction was found for all investigated materials.<\/p>\n
For the practical application of the technology, this implies potentials concerning reduced tool and workpiece loading as well as a more flexible press selection. This applies in particular to less critical forming operations regarding material failure.<\/p>","protected":false},"excerpt":{"rendered":"
Die mechanische Schwingungs\u00fcberlagerung mit Frequenzen im Ultraschallbereich ist ein bekannter Ansatz zur Reduzierung der Umformkraft. Bisher stellt das mangelnde detaillierte Prozessverst\u00e4ndnis jedoch ein Hemmnis f\u00fcr die breite industrielle Anwendung der Technologie dar. Die Untersuchungsschwerpunkte dieser Arbeit liegen in der Identifikation verantwortlicher Wirkmechanismen f\u00fcr das Ph\u00e4nomen der schwingungsbedingten Kraftreduzierung und der Analyse des Schwingungseinflusses auf das […]<\/p>\n","protected":false},"featured_media":2027,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[34],"product_tag":[],"class_list":{"0":"post-1509","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-fau-studien-aus-dem-maschinenbau","7":"has-post-title","8":"has-post-date","9":"has-post-category","10":"has-post-tag","11":"has-post-comment","12":"has-post-author","13":"","15":"first","16":"instock","17":"taxable","18":"shipping-taxable","19":"purchasable","20":"product-type-simple"},"acf":{"autor":"Michalski, Markus","orcid":"","ror":"","herausgeber":"","orcid_hrsg":"","rorhrsg":"","bearbeiter":"","sonstige_beteiligte_personen":"","untertitel":"","zusatz":"","jahr":"2019","zeitschrift":"","serie":"","serie_name":"","serie_band":"","serie_jahr":"","serie_titel_band":"","vortrage":"","issn":"","isbn":"","isbn13":"978-3-96147-270-3","seiten":"xii, 197","sonstiges":"","band":336,"auflage":"","opus":"","dspace":"13205","e-isbn_pdf":"978-3-96147-271-0","doi":"https:\/\/doi.org\/10.25593\/978-3-96147-271-0","epub":"","e-isbn_epub":"","doi_epub":"","html":"","e-isbn_html":"","doi_html":"","e-isbn_reader":"","doi_reader":"","digibib":"","urn":"urn:nbn:de:bvb:29-opus4-132059","supplementary_material":"","sprache":["Deutsch"],"ausgabe":"Softcover","suche":" 9783961472703 9783961472710 ","lizenz":"BY-NC-4","bemerkung":""},"builder_content":"","_links":{"self":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product\/1509","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/comments?post=1509"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/media\/2027"}],"wp:attachment":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/media?parent=1509"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_brand?post=1509"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_cat?post=1509"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_tag?post=1509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}