40 VOLUME 24, No. 3, 2020 * Corresponding author: Michal Fabian, E-mail address: michal.fabian@tuke.sk Acta Mechanica Slovaca 24 (3): 40 - 48, September 2020 https://doi.org/10.21496/ams.2020.020 Acta Mechanica Slovaca ISSN 1335-2393 www.actamechanica.sk Use of CAM Strategies for Tool Movement in Machining Surfaces of Various Shapes FABIAN Michal 1 , IŽOL Peter 2 , TOMÁŠ Miroslav 1 , KUPEC František 1 , KOPAS Melichar 3 1 Technical University of Košice, Faculty of Mechanical Engineering, Department of Automobile Production 2 Technical University of Košice, Faculty of Mechanical Engineering, Department of Technology, Materials and Computer Aided Production 3 Technical University of Košice, Faculty of Mechanical Engineering, Department of Machine Design and Transport Engineering Abstract: Implementation of the CAD systems in the feld of machine design allowed more possibilities for the design of free-form surfaces, which are especially used in the feld of shape design within the automotive and consumer industries. The connection of the CAD systems with the CAM machining technologies has brought a revolution in the feld of machining these surfaces. What until recently could be machined with a great efort on copy milling machines, where the clay or laminate model was an original, can now be produced using a virtual model, whereby the tool copies the shape of this model. The CAD/CAM systems already ofer analyses during design, which can verify the manufacturability of the modelled surface. The CAM systems ofer a number of tool movement strategies for machining a given surface. This paper is focused on the selection of the most suitable strategy for machining the shaped surfaces of the active parts of press tools for the production of automotive parts. It points out the importance of the CAD/CAM data needed in the stage of technological preparation of production, because they have a signifcant impact on the achieved surface quality. This paper deals with strategies of machining a planar inclined surface using horizontal and vertical machining strategies. The next part of the paper deals with machining of the Free Form Surface and the fnal part of the paper uses the described strategies for machining the shapes of the die cavity for connecting rod fttings. The experimental part is concentrating on the selection of the most suitable strategy of die milling for the production of the connecting rod (car internal combustion engine part). Simulations of production and the production of details from two diferent materials are realized on individual details of the mould. The resulting quality of the treated surface was evaluated based on the evaluation of surface roughness. Keywords: CAM manufacturing, suitable machining strategy, surface roughness evaluation, machining quality and speed, engine parts CAM manufacturing, efective tool movement. 1. Introduction Origins of the NC technology implementation describe Groover, M. in [1] and Chang, C.H. with Melkanof in [2]. Origins of NC programming were characterized by tool movement programming using APT language that has been developed to control NC machines in 1958. The next intense development of NC machinery control starts with beginning of 3D modeling using CAD systems. These systems allow CNC code generation by CAM modules since 70-ies last century as well. The surface modeling allows free form surfaces creation and 5-axis CNC machines make possible any surfaces designing and machining. Mentioned in combination with injection moulding of plastics as well as metal sheets forming have strong infuence to design of consumer and automotive industry products [3], [4], [5]. The main objective in beginnings of NC machines was to make the required shape.