Optimum Design of the Mechanical Press with
Low-Speed and Stamping-Punch Mechanism Based on Genetic Algorithm
He Yupeng, Zhao Shengdun, Yang Hui, Yuan Jianhua
(School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China)
Abstract: The Stephenson¡¯s chain is used as the working mechanism of the mechanical
press. The kinematical equations are established with 12 design variables, and the
mathematical mold of optimum desgn is also set up according to the minimum of the
fluctuating for which velocity, the maximum velocity, and the pressure angular in the
stamping-punch stage. On the basis of the key technical parameters of JH23-63 type
mechanical press, the Stephenson six-bar linkage mechanical press is designed by means of
genetic optimal algorithm, velocity of the slide in the nominal pressure stroke is 94
mm/s, proportion of for which forging-stamping stroke time to return time is 2.461 5, and
there is an obvious speed flatness of 99 mm/s in the speed curve of the mechanism. It is
shown that the working characteristics of this mechanical press are much better than the
conventionally common mechanical press in the low-speed stamping-punch and drawing
technology application.
Keywords: mechanical press; Stephenson¡¯s chain; speed; optimum; genetic algorithm