Patent ID: 6539603
Filing Date: 2003-04-01
Classification: B23P,B25B,Y10T

Abstract:
A method for self-programming a computerized power nutrunner control system for tightening a number of similar screw joints to a desired final torque level (MF), said method comprising:tightening initially at a low speed one of said screw joints up to said final torque level (Mt), while detecting and analyzing one or more screw joint characteristics, adjusting successively during a number of succeeding tightening processes one or more nutrunner operating parameters with respect to said detected and analyzed screw joint characteristics, and locking said self-programming after said nutrunner operating parameters have been adjusted to accomplish a sate tightening of successive ones of said number of similar screw joints to said final torque level (MF) at a satisfactory short time interval.