Rexroth Tightening System 350 System Documentation - Rhino ...

224/316 Bosch Rexroth AG | Tightening Technology 9 Tightening Processes9.2 Tightening program stepsThe gradient is continuously averaged 1) from the torque threshold for the gradient/yield point to the stepend and evaluated at the end of the step. “Freak” gradient values (e.g. with speed jumps) do not result ina tightening interruption thanks to the averaging function. The tightening step is evaluated as NOK if thetolerance limits have been violated ((GA ≤ GA–) and/or (GA ≥ GA+)), and otherwise as OK.This monitoring function cannot be selected as switching.Tightening, upper/lowerThis tightening monitoring is primarily used in tightening processes with self-cutting screws and ensuressafe completion of the tightening (screwing in) phase.[Nm](1)(2)TM JFTIu+MEo+MuUoRuRoTIl–MEu–Ml UuRlRu[ o ]Figure 9–31:Tightening, upper/lower monitoring function where T = f(A)(1) Find tightening step(2) Tightening step for screwing in (e.g. cut thread)TCh+ Upper torque tolerance limit for Tightening, upperTCl– Lower torque tolerance limit for Tightening, lowerMu Upper monitoring angleMl Lower monitoring angleRu Upper flashback angleRl Lower flashback angleT J Joining torque (target function Upper torque)Figure 9–32:Example parameterization for Tightening, upper/lowern1) GA = [ ∑ G] ⁄ n , with n = number of gradients determined in the measurement transducer1System 350 | 3 608 878 040/05.2008