Dimensional synthesis of dwell function generators. On 6-link Stephenson mechanisms.

Dwell function generators are applicable broadly to several kinds of automatic machines, because they need not have any special control equipment for positioning and therefore have high responsibilities. In the present paper, Stephenson type 6-link crank-and-rocker mechanisms are studied. Conditions for output arms to dwell at the edge points of rocking are analyzed, and relationships between the dwell periods and mechanism parameters are clarified numerically by simulations. Such relationships are approximated by polinomials in the order of less than five, and giving the dwell periods as design data, an automatic optimum synthesis of 6-link dwell mechanisms is carried out.