@article{MTMT:3077374, title = {Extension of empirical specific cutting force model for the process of fine chip-removing milling}, url = {https://m2.mtmt.hu/api/publication/3077374}, author = {Biró, István and Szalay, Tibor}, doi = {10.1007/s00170-016-8957-x}, journal-iso = {INT J ADV MANUFACT TECHNOL}, journal = {INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY}, volume = {88}, unique-id = {3077374}, issn = {0268-3768}, abstract = {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.}, year = {2017}, eissn = {1433-3015}, pages = {2735-2743}, orcid-numbers = {Biró, István/0000-0002-5616-0973; Szalay, Tibor/0000-0003-3446-2898} } @article{MTMT:3160524, title = {Burr minimisation in face milling with optimised tool path}, url = {https://m2.mtmt.hu/api/publication/3160524}, author = {Póka, György and Németh, István and Mátyási, Gyula}, doi = {10.1016/j.procir.2016.11.113}, journal-iso = {PROCEDIA CIRP}, journal = {PROCEDIA CIRP}, volume = {57}, unique-id = {3160524}, year = {2016}, eissn = {2212-8271}, pages = {653-657}, orcid-numbers = {Póka, György/0000-0002-7585-986X; Németh, István/0000-0001-7122-3891} } @article{MTMT:1248263, title = {Chatter stability of milling in frequency and discrete time domain}, url = {https://m2.mtmt.hu/api/publication/1248263}, author = {Altintas, Y and Stépán, Gábor and Merdol, D and Dombóvári, Zoltán}, doi = {10.1016/j.cirpj.2008.06.003}, journal-iso = {CIRP J MANUF SCI TECHNOL}, journal = {CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY}, volume = {1}, unique-id = {1248263}, issn = {1755-5817}, abstract = {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}, year = {2008}, eissn = {1755-5817}, pages = {35-44}, orcid-numbers = {Stépán, Gábor/0000-0003-0309-2409; Dombóvári, Zoltán/0000-0003-2591-3220} } @article{MTMT:2646739, title = {Micromilling of Metallic Materials}, url = {https://m2.mtmt.hu/api/publication/2646739}, author = {Takács, Márton and Verő, Balázs and Mészáros, Imre}, doi = {10.1016/S0924-0136(03)00064-5}, journal-iso = {J MATER PROCESS TECH}, journal = {JOURNAL OF MATERIALS PROCESSING TECHNOLOGY}, volume = {138}, unique-id = {2646739}, issn = {0924-0136}, year = {2003}, eissn = {1873-4774}, pages = {152-155}, orcid-numbers = {Takács, Márton/0000-0001-6882-1540} }