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The course leads the student to understand the first steps of a mechanical design, where the engineer must be able to choose among different options and must identify the critical points of the whole design.
Motion design Motion types classification. Properties of the acceleration diagram. Techniques for the maximum acceleration, maximum power, vibration effects limitation. Combined situations. Motion smoothing. Trapezoidal motion profiles. Problems linked with the improvement of the motion profiles. Periodical motion definition Mechanism design. Motion transmission. Pressure angle. Motion analysis. Dynamic analysis. Techniques to reduce the motion irregularities. Cam mechanisms design General problems. Kinematic analysis. Cams and followers classification. Graphic procedure for the cam profile synthesis. Analitical profile synthesis. Determination of the base radius. Techniques to reduce the cam dimensions. Types of cam-follower coupling: force closure, form closure Mechanical stresses. Techniques to modify the follower motion profile. Cams profile manufacturing. Computer aided cams design. Other mechanisms. Planar mechanisms, free-wheel mechanisms. Geneva Wheel mechanism. Planar and spatial indexing mechanisms. Differential mechanisms. Controlled intermittent motions. The choice of a proper motor for a mechanism. Software for mechanisms analysis.
P. L. MAGNANI, G. RUGGIERI, Meccanismi per Macchine Automatiche, UTET, Torino, 1986
A. BORBONI, R. FAGLIA, Parasitic phoenomena in the dynamics of industrial devices. CRC Press, Taylor and Francis Group, New York, 2012.
The course will be held by theoretical lessons, tutorials and some visits in Department labs as well as to firms of the territory.
The learning ability is verified by means of a final examination or by means of some tests during the course. There is also the possibility of executing a design work during the year with a final evaluation.