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Influence of cutting edge geometry on force build-up process in intermittent turning
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). Seco Tools AB,Fagersta, Sweden. (PTW)ORCID-id: 0000-0003-3876-2361
Division of Production and Materials Engineering, Lund University, Sweden.
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). (PTW)ORCID-id: 0000-0001-9331-7354
Division of Production and Materials Engineering, Lund University, Sweden.
2016 (Engelska)Ingår i: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 46, s. 364-367Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the intermittent turning and milling processes, during the entry phase the cutting edges are subjected to high impact loads that can give rise to dynamical and strength issues which in general cause tool life reduction. In this study the effect of geometrical features of the cutting tool on the force generation during the entry phase is investigated. Cutting forces are measured by a stiff dynamometer at a high sampling frequency. In addition, the chip load area is analyzed and related to the measured cutting force. The results show that micro-geometrical features, in particular the protection chamfer, significantly affect the force generation during the entry phase.

Ort, förlag, år, upplaga, sidor
2016. Vol. 46, s. 364-367
Nyckelord [en]
Cutting, force, edge, chip, turning, dynamic
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi
Forskningsämne
TEKNIK, Produktions- och materialteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-9324DOI: 10.1016/j.procir.2016.04.013Scopus ID: 2-s2.0-84978786104OAI: oai:DiVA.org:hv-9324DiVA, id: diva2:922845
Konferens
7th HPC 2016 – CIRP Conference on High Performance Cutting, Chemnitz, Germany, May 31-June 2, 2016
Tillgänglig från: 2016-04-25 Skapad: 2016-04-25 Senast uppdaterad: 2019-05-15Bibliografiskt granskad
Ingår i avhandling
1. Analysis of entry phase in intermittent machining
Öppna denna publikation i ny flik eller fönster >>Analysis of entry phase in intermittent machining
2018 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Cutting forces and vibrations are essential parameters in the assessment of a cutting process. As the energy consumption in the machining process is directly affected by the magnitude of the cutting forces it is of vital importance to design cutting edges and select process conditions that will maintain high tool performance through reduced energy consumption. The vibrations are often the cause of poor results in terms of accuracy, low reliability due to sudden failures and bad environmental conditions caused by noise. The goal of this work is to find out how the cutting edge and cutting conditions affect the entry conditions of the machining operation. This is done utilizing experimental methods and appropriate theoretical approaches applied to the cutting forces and vibrations. The research was carried out through three main studies beginning with a force build-up analysis of the cutting edge entry into the workpiece in intermittent turning. This was followed by a second study, concentrated on modelling of the entry phase which has been explored through experiments and theory developed in the first study. The third part was focused on the influence of the radial depth of cut upon the entry of cutting edge into the workpiece in a face milling application. The methodology for the identification of unfavourable cutting conditions is also explained herein. Important insights into the force build-up process help addressing the correlation between the cutting geometries and the rise time of the cutting force. The influence of the nose radius for a given cutting tool and workpiece configuration during the initial entry is revealed. The critical angle i.e. the position of the face milling cutter that results in unfavourable entry conditions has been explained emphasizing the importance of the selection of cutting conditions. Finally, the theoretical methods utilized for the evaluation of the role of cutting edge geometry within entry phase dynamics has been explored. This has revealed the trends that are of interest for selection of cutting conditions and cutting edge design.

Ort, förlag, år, upplaga, sidor
Trollhättan: University West, 2018. s. 74
Serie
Licentiate Thesis: University West ; 21
Nyckelord
Entry; Cutting force; Cutting edge geometry; Acceleration
Nationell ämneskategori
Bearbetnings-, yt- och fogningsteknik
Forskningsämne
Produktionsteknik
Identifikatorer
urn:nbn:se:hv:diva-12255 (URN)978-91-87531-80-4 (ISBN)978-91-87531-79-8 (ISBN)
Presentation
2018-04-19, 10:00 (Engelska)
Handledare
Tillgänglig från: 2018-04-19 Skapad: 2018-04-16

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