Dynamic model and modal analysis for globoidal cam indexing mechanism with steel ball
Li Lei’Feng xian-ying’Zhang cheng-liang’Mu shi-gang’Wang sui-yuan
Key Laboratory of High Efficiency and Clean Mechanical Manufacturing, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
Abstract:Abstract:Dynamic model of a new type of globoidal cam indexing mechanism with steel ball was established through Lagrange Equation. In this process mass of roller was neglected, and the contact stiffnesses between roller and cam and between roller and indexing plate can be regarded as series connection. According to rotary transform tensor theory geometric displacement relation of generalized coordinates was analyzed. Dynamic equations of the mechanism considering torsion modulus were built, and natural frequency and vibration mode of transmission system were obtained. The results show that natural frequency is variable at indexing period and invariable at dell period, and natural frequency trends of different order are dissimilar.