Rexroth Tightening System 350 System Documentation - Rhino ...

9 Tightening Processes Tightening Technology | Bosch Rexroth AG 215/3169.2 Tightening program stepsFigure 9–10:Extended tightening step (Xt step) dialog9.2.3.1 Step characteristicsThe step characteristics for the extended tightening step must be specified analog to those for the standardtightening step (see page 211).9.2.3.2 Target functionThe target functions include all the target functions for the standard tightening step (see page 212) andthe following additional functions:– Upper torque (corresponds to the target function Torque in the standard tightening step)– Lower torque– Relative torque, upper– Relative torque, lower– Gradient.Upper torqueLower torqueRelative torque, upperRelative torque, lowerGradientA bolted connection is tightened until the set tightening torque is reached. The tightening graph movesupwards. The Upper torque target function replaces the Torque target function from the standard tighteningstep.A bolted connection is rotated until the torque falls to the set value. The tightening graph moves downwards.A bolted connection is tightened until it reaches the tightening torque that was calculated relative to theend, average, or maximum value in the previous tightening step. A prerequisite for this is the calculationof the end, average, or maximum value in the previous tightening step.A bolted connection is tightened until the torque falls to the set value that was calculated relative to theend, average, or maximum value in the previous tightening step. A prerequisite for this is the calculationof the end, average, or maximum value in the previous tightening step.A bolted connection is tightened until the set gradient is reached. The gradient is the measure of the slopein the tightening graph (T = f (A)) and is continually determined in the measurement transducer. The gradientparameters are determined in the start step (see page 206).System 350 | 3 608 878 040/05.2008