Open AccessEXPERIMENTAL ANALYSIS OF THE INFLUENCE OF BALLSCREW STIFFNESS ON THE POSITIONING PRECISION OF KINEMATIC FEED CHAINS USED ON CNC MACHINE TOOLS
Author(s) -
Marian Funaru,
Gheorghe Stan
Publication year - 2017
Publication title -
journal of engineering studies and research
Language(s) - English
Resource type - Journals
eISSN - 2344-4932
pISSN - 2068-7559
DOI - 10.29081/jesr.v20i2.75
Subject(s) - kinematics , dimensioning , stiffness , machine tool , context (archaeology) , kinematic chain , constructive , computer science , acceleration , control theory (sociology) , control engineering , engineering , mechanical engineering , structural engineering , control (management) , artificial intelligence , aerospace engineering , paleontology , classical mechanics , biology , operating system , process (computing) , physics
Recent trends in the machine tools domain have focused on improving the manufacturing performances by increasing the feed rates and acceleration values. In this context, the stiffness of the constructive elements which form the mechanical part of the kinematic feed chains need to be studied in order to determine the machine tool dynamic behavior. This study plays a very important role in the correct dimensioning of the feed chain structure and in establishing an optimum control law for the closed-loop system. The present paper presents an experimental study which demonstrates the influence of the whole kinematic feed chain stiffness on the positioning precision of the moving table. Experimental tests were carried out on a test bed which uses the indirect position measuring system, in which case all the external disturbances affecting the mechanical part are found in the values of the positioning precision parameters.
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