Patent ID: 7415862
Filing Date: 2008-08-26
Classification: B30B

Abstract:
1. A press device comprising: a base; a support plate supported in parallel with the base through a plurality of guide poles installed upright on the base; a slider capable of sliding on said guide poles and capable of vertical movement between said base and said support plate; a plurality of drive shafts engaged with a plurality of pressurizing points distributed on the slider for pressing the slider; a plurality of motors for driving each of the drive shafts respectively; a control means for driving control of each of the motors independently among the plurality of motors; and a plurality of displacement measuring means for measuring position displacement of said slider with respect to said base, said control means having an extraction data means for extracting displacement data corresponding to inclination of said slider during actuation of slider at a plurality of time periods based on rotation of each drive shaft by each of said motors and for extracting data of torque supplied to each said motor as a function of time at each said time period during actuation of said slider; and a driving and controlling means for performing additional torque strengthening driving such that additional torque is applied to each of said motors based on said data of torque as a function of time for each of said motors at each of said time periods, each of said motors being independently driven and controlled to correct said inclination of said slider based on said data of torque as a function of time.