XXIV CIRP Sponsored Conference on
Supervising and Diagnostics of Machining Systems

Karpacz, 11th - 14th March 2013

INNOVATIVE MANUFACTURING

The Organizing Committee cordially invites you to participate in the XXIV CIRP Sponsored Conference on Supervising and Diagnostics of Machining Systems, which will be held from the 11th to 14th of March 2013 in Karpacz, Poland.
For further information about the Conference please read the attached brochure.
I welcome you and I will be looking forward to seeing you in Karpacz in March 2013.
Additionally, I would be grateful if you could forward this information to anyone who may be interested in participating at the Conference.

Attachments:

XXIV -KARPACZ-2013.pdf

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1. Wprowadzenie

Mechanizm formowania zadzioru na krawędzi przedmiotu obrabianego jest niezwykle skomplikowanym i złożonym zjawiskiem. Wiele czynników ma wpływ na wielkość i kształt zadzioru. Do najważniejszych możemy zaliczyć rodzaj obróbki, geometrię narzędzia skrawającego, parametry skrawania, czynnik chłodząco smarujący oraz kształt toru ruchu narzędzia. Istotny wpływ na zjawisko tworzenia zadzioru mają też własności materiału obrabianego. W znacznym stopniu determinują one sposób odkształcenia, miejsce i moment inicjacji pęknięcia oraz kierunek propa¬gacji pęknięcia [1, 3, 4, 7, 9 ].

Abstract: A model of burr formation on the edge of the workpiece in the course of machining is presented. The material being machined, the cutting tool and the machining parameters were modelled. Material properties and type of its deformations have been modelled with the use of a constitutive Johnson - Cook model. Material damage initiation criteria and associated damage evolution have been modeled with the use of a the ductile damage and the Johnson-Cook damage initiation criterion. Simulations of the machining process for different depths of cut were carried out. The real burr formation presented by Hashimura was compared with the modelled one. The influence of the cutting parameters on the form and size of burr has been analysed. Calculations have been realised utilising finite element method with the use of nonlinear analysis in ABAQUS/Explicit environment. Based on simulation results, the assessment of the form and size of burr has been made. Burr height was used to evaluate its size, which was derived according to ISO 13715 standard. The goal was to obtain a model that reliably reflect the behavior of material during machining, with particular emphasis on supporting the creation of cutting phenomenon of burr formation. The results of simulation and computational analysis confirmed that the model reflects the real behavior of the material.

Key words: burr formation, finite element simulation, cutting, 2D numerical model

Abstract: The aim of the study was to determine the energy required to perform the machining of selected parts, and then to assess the quality of the machine tools from the point of view of their energy consumption. A method for determining and assessing energy consumption was developed. Test workpieces, tools and cutting pa- rameters for lathes and milling machines were proposed. Specific cutting tests for different cutting speeds, feed rates and depths of cut were carried out. On the basis of the instantaneous values of the power con- sumed by the machines in idle operating conditions and during the cutting process, their cutting energy con- sumption indices were determined.

Key words: machine tool, energy consumption, cutting tests, assessment

Skoczyński Wacław, Mączka Janusz, Wasiak Zbigniew, Roszkowski Andrzej, Preś Paweł: Assesment of energy consumption by machine tools. W: Management of Technology : Step to Sustainable Production, MOTSP 2012 : 4th International Conference, 14-16 June 2012, Zadar, Croatia / [ed. Predrag Cosic]. Zagreb : Croatian Association for PLM, cop. 2012. s. 238-245, 9 rys., 2 tab., bibliogr. 10 poz. ISSN 1847-6880.