Kinematic Analysis On An Axial/Radial Telescopic Tire Building Drum

Based on an axial and radial telescopic tire building drum which is proposed byWYKO Company, after analyzing the structure, the configuration synthesis and theexpansion movement characteristics is studied, etc. The main contents andachievements are as follows:(1) Configuration study. Firstly the requirements of the telescopic motion areintroduced. Then based on the analysis of the topological characteristics of a shearfork type internal basic telescopic unit, some other configurations has the sametopological characteristics and also can meet the movement requirements areproposed. All these provide references for the innovation design of this kind of tirebuilding drum.(2) Kinematic analysis of internal slab. The structure and the movement principleof the drum are analyzed systematically. Mathematical model of the internal slabdriving mechanisms is established and followed by an example. After that, thepayload index is defined, and then the effects of main parameters on the performancesare analyzed to provide the certain support for size synthesis.(3) Kinematic analysis of external slab. Based on a pair of internal slabs whichcan drive the external slabs, the equal model of external slab-link mechanism isestablished. Then motion analysis equations are deduced to provide a useful methodto study the laws of telescopic motion. All these can help to find the method to designthe profiles of cams with oscillating follower whose center distance is variable.(4) Apply the virtual prototype technology to accomplish the design and motionsimulation of the axial/radial telescopic tire building drum. The results have verifiedthe correctness of the method and also offer some preferences for innovative design.