Rexroth Tightening System 350 System Documentation - Rhino ...

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222/316 Bosch Rexroth AG | Tightening Technology 9 Tightening Processes9.2 Tightening program stepsT[– Permissible lower tolerance limit for range (5 Nm)T[+ Permissible upper tolerance limit for range (15 Nm)T[ RangeTmax Maximum occurring torqueTmin Minimum occurring torqueTF:A Angle target functionFigure 9–26:Example parameterization for Torque rangeAt the end of the tightening step, the range T[ = Tmax – Tmin is calculated, evaluated and compared tothe tolerance values T[+ and T[–.If the tolerance limits– T[ ≤ T[–and/or– T[ ≥ T[+have been violated, the tightening step is evaluated as NOK, and otherwise as OK.This monitoring function cannot be selected as switching.GradientG[Nm] [Nm/o]G=MTAWTMAWG+TtG MsG = = 11 11TMGG– G-TF:A ZF: W[o]Figure 9–27:Gradient monitoring function where T = f(A)T Torque courseG Gradient courseTtG Absolute torque threshold for gradient calculation = 11 NmG+, G– Gradient tolerance limitsTF:A Angle target function = 360°System 350 | 3 608 878 040/05.2008
9 Tightening Processes Tightening Technology | Bosch Rexroth AG 223/3169.2 Tightening program stepsFigure 9–28:Example parameterization for gradientGradient average valueΔTGradient monitoring (gradient calculation: G = ------ ) takes place from the torque threshold for the gradient/yieldpoint (in the example: T = 11 Nm). The gradient values determined in the measurement trans-ΔAducer are compared to the tolerance values G– and G+ (in the example: 0.25 Nm/° and 0.4 Nm/°).Information on setting the gradient parameters can be found on page 206.The tightening step is evaluated at the end of the step: The tightening step is evaluated as NOK if thetolerance limits ((G ≤ G–) and/or (G ≥ G+)) have been violated, and otherwise as OK.If this monitoring function has been set as switching, the tightening process will be immediately abortedand evaluated as NOK if the tolerance limits ((G ≤ G–) and/or (G ≥ G+)) have been violated.[Nm]G[Nm/ o]TtGMs(G)= 11 = 11MTGGA+ GM+GM GAGA– GM–TF:A ZF:W[o]Figure 9–29:Gradient average value monitoring function where T = f(A)TTorque courseGGradient courseTt(G)GAGA+, GA–Absolute torque threshold for gradient calculation = 11 NmGradient average valueGradient average value tolerance limitsTF:A Angle target function = 360°Figure 9–30:Example parameterization for gradient average valueSystem 350 | 3 608 878 040/05.2008
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Rexroth Tightening System 350System
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ContentsSchraubtechnik | Bosch Rexr
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Bosch Rexroth AGElectric Drives and
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