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In this paper is presented a MATLAB Program-module, with the representation the parametric equations of the manufacturing through milling and rectification the elliptic piston of hydraulic rotary motor (or hydraulic pump). The processing of the elliptic piston may to make too by tools-machinery with numeric command (MT-NC), wherefore successive positions of the milling or rectification tool will displace on the mathematic curve line close, equidistant roundabout contour profile of the ellipse (fig. 1), thereupon and equations to be ascertain by mathematic calculation. Thus, for processing with milling and rectification tools cylindrical-frontal with radius of the cylinder of the tool R, is presented on remain method cinematic for determinate parametrical equations of the positions of centre of the manufacturing cylindrical-frontal tool, curve line close up, equidistant roundabout contour profile of the ellipse around by ellipse’s contour. Equation of ellipse with the centre in the original of Cartesian system Oxy is:

annals of the oradea university. fascicle management and technological engineering

THE DETERMINATION OF RELATIONS FOR CALCULATION BY PROCESSING THE ELLIPTIC PISTON THROUGH THE MILLING AND RECTIFICATION MACHINES WITH NUMERIC COMMAND BY CYLINDRICAL - FRONTAL TOOLS