Patent ID: 6116068
Filing Date: 2000-09-12
Classification: B21C

Abstract:
A method of drive regulation for the slide-free operation of a multiple drawing machine or drawing device, respectively, including a plurality of draw plates for drawing a billet, wherein each of said draw plates is drivable by an assigned, separately controllable drive, and wherein drawing dies can be provided between the draw plates, said drawing dies serving to reduce the cross-section and thus extend the material drawn, with particular characteristic values, being automatically taken up or collected, respectively, at each drive, the method comprising the steps of:a) automatically determining effective torques necessary for a deformation process at individual drawing stages at every starting process at low and constant speed in operation with slip, a reference comparative value (.DELTA.M.sub.L) being formed from the effective torques of every two adjacent draw plates,b) determining the effective torques at the drawing stages in slip-free production operation and forming of a comparison of every two adjacent draw plates for forming a first torque comparative value (.DELTA.M.sub.1) each,c) comparing the collected first torque comparative value (.DELTA.M.sub.1) with the predetermined reference torque comparative value (.DELTA.M.sub.L), andd) in the case of deviations of the current first torque comparative value (.DELTA.M.sub.1) from the reference torque comparative value (.DELTA.M.sub.L), overlapping of the regulation of the speed of rotation of the drives such that the respective slower drive modifies the speed of rotation of the pertinent draw plate until the deviation between the torque comparative values is substantially 0 again.