TY - JOUR AU - Biró, István AU - Szalay, Tibor TI - Extension of empirical specific cutting force model for the process of fine chip-removing milling JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 88 PY - 2017 IS - 9 SP - 2735 EP - 2743 PG - 9 SN - 0268-3768 DO - 10.1007/s00170-016-8957-x UR - https://m2.mtmt.hu/api/publication/3077374 ID - 3077374 N1 - Funding Agency and Grant Number: CEEPUS III [HR 0108]; Hungarian-Mexican Bilateral Project [TeT-12_MX]; EUEuropean Commission [H2020-WIDESPREAD-2014-1-FPA-664403]; [TAMOP-4.2.2.B-10/1-2010-0009] Funding text: The work reported in this paper is connected to the project "Talent care and cultivation in the scientific workshops of BME" project. The project is supported by grant TAMOP-4.2.2.B-10/1-2010-0009. The authors would like to acknowledge the support provided by the CEEPUS III HR 0108 project. The current research is connected to the topic of the project TeT-12_MX Hungarian-Mexican Bilateral Project "Experimental and theoretical optimization and control of machining technology and tool path for micro milling". This research was partly supported by the EU H2020-WIDESPREAD-2014-1-FPA-664403 Teaming project "Centre of Excellence in Production Informatics and Control". The authors would also like to express their gratitude to Sumitomo Electric Hardmetal Ltd. for making the milling tool and inserts available for the purpose of the current study. AB - Specific cutting force is a frequently used parameter to classify and describe the energetic environment of mechanical machining operations. It defines the ratio of cutting forces and theoretical chip section during machining. This definition makes it possible to create general technological models for precise process planning. Classical models of cutting forces already indicate that specific cutting force cannot be modelled using a single low-level analytical function due to the marked presence of size effect. The problem is amplified in the case of micro-chip forming, where the relative scale of elastic and plastic deformations in the machined material differ from those experienced in conventional cutting conditions. Previous research proved that boundaries of specific cutting forces can be defined by values of exact uncut chip thicknesses, in which case the sections of specific cutting force may indicate different types of material deforming processes. The aim of current research presented in this paper is to extend the empirical model of specific cutting force for fine chip-removing cutting processes by identifying a new boundary section of uncut chip thickness. Therefore, a new boundary chip thickness was defined based on data obtained with reference to experimental cutting force. New boundary chip thickness follows the so-far proven tendencies of already known section borders and this enables the extension of the validity range of classical approaches presented by specific cutting force models beyond macro-scaled chip forming to micro-scaled chip forming processes. The extension of the model considers the effect of cutting parameters, primarily that of feed rate. LA - English DB - MTMT ER - TY - JOUR AU - Póka, György AU - Németh, István AU - Mátyási, Gyula TI - Burr minimisation in face milling with optimised tool path JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 57 PY - 2016 SP - 653 EP - 657 PG - 5 SN - 2212-8271 DO - 10.1016/j.procir.2016.11.113 UR - https://m2.mtmt.hu/api/publication/3160524 ID - 3160524 LA - English DB - MTMT ER - TY - JOUR AU - Altintas, Y AU - Stépán, Gábor AU - Merdol, D AU - Dombóvári, Zoltán TI - Chatter stability of milling in frequency and discrete time domain JF - CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY J2 - CIRP J MANUF SCI TECHNOL VL - 1 PY - 2008 IS - 1 SP - 35 EP - 44 PG - 10 SN - 1755-5817 DO - 10.1016/j.cirpj.2008.06.003 UR - https://m2.mtmt.hu/api/publication/1248263 ID - 1248263 AB - Chatter stability of milling operations has been gaining \nsignificant attention with a view to improving the material \nremoval rates in high speed machining of aluminum alloys and \nlow speed milling of difficult to cut, thermal resistant \nalloys. This paper presents frequency and discrete time domain \nchatter stability laws for milling operations in a unified \nmanner. The time periodic dynamics of the milling process are \nmodelled. By averaging time varying directional factors at \ncutter pitch intervals, the stability lobes are solved directly \nand analytically. When the process is highly intermittent, \nwhich occurs at high speeds and low radial depth of cuts, the \nstability lobes are more accurately solved either by taking \nhigher harmonics of directional factors in frequency domain, or \nby using semi-discretization method. This paper compares the \nstability solutions against the numerical solutions and \nexperiments, and provides comprehensive mathematical details of \nboth fundamental stability solutions. \n \n \n \n \n \n \n \n \n LA - English DB - MTMT ER - TY - JOUR AU - Takács, Márton AU - Verő, Balázs AU - Mészáros, Imre TI - Micromilling of Metallic Materials JF - JOURNAL OF MATERIALS PROCESSING TECHNOLOGY J2 - J MATER PROCESS TECH VL - 138 PY - 2003 SP - 152 EP - 155 PG - 4 SN - 0924-0136 DO - 10.1016/S0924-0136(03)00064-5 UR - https://m2.mtmt.hu/api/publication/2646739 ID - 2646739 LA - English DB - MTMT ER -