Patent ID: 6366046
Filing Date: 2002-04-02
Classification: B21D,B30B,G05B

Abstract:
A system for a mechanical press wherein the transmission mechanism has a rotational input member and a sliding output member so that the press is capable of performing different processes, said system comprising:a) a servomotor as the power input of said press and which drives the rotational input member with variable speed; b) a coupling connecting said servomotor to said rotational input member; c) a PC-based controller for storing variable speed function trajectories corresponding to said different processes and performing in time control of said servomotor along the variable speed function trajectories for the different processes; d) an angular positioning sensor associated with said servomotor for transmitting angular position information of said servomotor to said PC-based controller for in-time control thereof; and e) a linear positioning sensor associated with the sliding output member for transmitting linear position information of said member to said PC-based controller for in-time control of said servomotor; wherein the variable speed function trajectories stored in said PC-based controller are made up of Bezier curves with sets of control points which depend on the link lengths of the press mechanism and the process being worked on, and the corresponding desired linear speed of said slide member is stored in said PC-based controller for verification.