METHODS AND SYSTEMS IN MACHINE DESIGN AND MACHINE DYNAMICS AND MULTIBODY SYSTEMS SIMULATIONS CAD/CAE tools using for better recognition grinding parameters M. Macko 1 , J. Flizikowski 2 , A. Mroziński 2 , K. Tyszczuk 1 , T. Rydzkowski 3 , M. Jankowski 1 , J. Czerniak 1 1 Faculty of Mathematics, Physics and Technical Sciences, Casimir the Great University in Bydgoszcz, Bydgoszcz, Chodkiewicza 30, Poland, mackomar@ukw.edu.pl 2 Faculty of Mechanical Engineering, University of Technology and Life Sciences, Bydgoszcz, Al. Prof. Kaliskiego 7, Poland, fliz@utp.edu.pl 3Faculty of Mechanical Engineering, Koszalin University of Technology, Koszalin, Racławicka 15-17, Poland, tomasz.rydzkowski@tu.koszalin.pl Abstract: Computer techonologies have great possibilities concerning aided design as well as acquisition and management of data about the process from the point of view of generating constructional guidelines and ordering knowledge from a given field – encoding (codification) and undeline the innovative design of grinders. CAD, CAE and GA tools have been used in the way of looking for the best solution of grinder. Implementations of this methods and introduction of a multi- edge comminution, make possibilities of changes some parameters in aim to obtain expected dimensions of milled material. Some results and analysis have been compared with laboratory results with high accuracy. Keywords: Computer Aided Design, comminution, energy effectiveness 1 INTRODUCTION According to the current state-of-the-art of the research topic, CAD systems basically influence the cost reduction and time of looking for the optimal design solution (innovation). AI applications allow the detailed analysis of employing the granulating system in a wide range of investigation. One of a popular group of machines are grinders. Investigations are usually directed in aim to improvement the design of grinders and to increase the process efficiency [1-5, 8, 9, 12, 16]. The efficiency is influenced by innovation of the design and technology of working components as well as by the type of the material, shape of grinded parts and expected average size (geometric form) of the ground particles. The motive of research aiming at improving the efficiency of comminution processes is huge amounts of energy expended on comminution devices. It seems that search for methods, which can improve these processes will be expected. There are known direct methods of process investigation using grinders, as well as other, based on new computer applications, unitary tests of de-cohesion (static and dynamic) [1, 3, 6, 7, 10, 11]. In this paper we are focusing on the possibilities of using the results obtained from computer simulation – especially strength and kinematic condition and we try to check how the results can be compared with the results obtained during milling of materials in laboratory condition. The initial analysis indicated new areas of construction which can be changed in aim to decrease energy needed to milling and increase the quality of final product. Additionally the analysis of strain of disintegrated element can be useful to describe an optimal state – according to material durability. In the unitary process an indication of such solutions where energetic relations are more advantageous has big influence. The behaviour of the disintegrated element (cracking, bending, stretching, turning round, displacement of material) depends mainly on the machine construction, and among other things the shape of working space and working tools (e.g. knives, hammers, etc.) as well as on kinematic relations between such elements. Definition of grinding energy expenditure, for a better understanding of the problem of milling efficiency, needs the three terms to be distinguished: