Rexroth Tightening System 350 System Documentation - Rhino ...

240/316 Bosch Rexroth AG | Tightening Technology 9 Tightening Processes9.4 Example parameterizationsPrg_YieldPoint programTable 9–2: Explanation of the tightening program Prg_YieldPointStep Parameters ExplanationStart 1, A Torque filter factor: 20; chord angle 8° Definition of the gradient parametersFind 2, A Target function: Angle 360° Bolt finds thread startAdditional function: speed –40 rpm Negative speed, as negative direction of rotation of the spindleTightening 3, A Target function: Torque 15 Nm Tighten the parts to 15 NmAdditional function: Speed 50 rpm Positive speed, as positive direction of rotation of the spindleMonitoring function: TorqueT–: 13 Nm, T+ (switching): 17 NmTorque monitoring: Cancellation of the tightening process asNOK if the upper limit is exceededExt. tighteningstep (Fig. 9–46)4, A Target function: Yield point 50% Yield point of the bolt is reached at approx. 50% of the max. gradientvalueTorque thresholds: absolute 20 Nm Start of calculation of the yield pointAdditional function: Speed 10 rpm Positive speed, as positive direction of rotation of the spindleAdditional function: Control angle: 5° To ensure the reached yield point reductionMonitoring function: TorqueT–: 0 Nm, T+ (switching): 50 NmMonitoring function: GradientG–: 0 Nm/°, G+ (switching): 2 Nm/°End 5, A - End of the tightening programTorque monitoring, cancellation of the tightening process as NOKif the upper limit is exceededGradient monitoring, cancellation of the tightening process asNOK if the upper limit is exceededFigure 9–46:Parameters in the Ext. tightening stepExplanation: The incline of graph T = f(A) is continually measured throughout the entire tightening processfrom the torque threshold = 20 Nm. The yield point is approx. 50% of the maximum value of the gradient(Yp ≈ Gmax/2).9.4.2 Tightening depth recognition with quick inputTightening depth recognition is used for e.g.– Tightening threaded pins– Setting processesFig. 9–47 shows a configuration for recognizing the tightening depth. The B1 interface of the CS351 providesthe +24 V supply voltage (pin 5). A normally open contact is located under the bolt. If this contactis closed while the bolt is tightened, +24 V is applied at the interface.System 350 | 3 608 878 040/05.2008