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Method for self-programming a power nutrunner control system during initial tightening processes

  • US 6,539,603 B1
  • Filed: 12/04/2000
  • Issued: 04/01/2003
  • Est. Priority Date: 03/19/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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