Design and analysis of cam lifting curve in applying to transient and heavy load

摘要

This paper presents a method for designing cam lifting curve applying to transients and heavy load in the operating system of large hydraulic press. The lifting curve is made up of two parts with the frontal segmental using involute and the posterior segment using quadratic curve. The lifting curve can match up with the characteristics of load. It can achieve smaller pressure angle in heavy load area using involute, and faster opening speed in light load area using quadratic curve. In order to give a detailed de-scription of the method, it designed the cam lifting cure used in the operating system of 300MN forging hydraulic press. Field applications showed that the cam with this lifting curve can effectively reduce the fault frequency of the guide sleeve and the cam follower. It provides an effective method for designing the cam lifting curve with transient and heavy load.