Rexroth Tightening System 350 System Documentation - Rhino ...

9 Tightening Processes Tightening Technology | Bosch Rexroth AG 235/3169.3 Tightening processesExample 3The program sequence is prematurely ended due to an event (e.g. maximum number of cycles in theNOK branch step exceeded, timeout for synchronization step exceeded) in an auxiliary step (e.g. NOKbranch step, synchronization step).As an example, the following table describes the evaluation of the tightening steps in the figure on theleft and their consequences for the end of the tightening process (maximum number of cycles for NOKbranch step 3, A = 3).Evaluation of the tighteningstepConsequence2, A with NOK (1st cycle) Execution of NOK path2, A with NOK (2nd cycle) Execution of NOK path2, A with NOK (3rd cycle) Execution of NOK path2, A with NOK (4th cycle) Cancellation of the tightening process with end step 5, A,as a maximum of 3 cycles are permitted in the NOKbranch in this example.9.3 Tightening processes9.3.1 OverviewThe following contains an explanation of the tightening processes that are currently the most importantfor tightening technology. The steps in the tightening programs and applications described on page 203can be used to program all standard tightening processes, as well as special tightening processes, in theBS350.Standard tightening processes include:– Torque-controlled tightening processes (see page 236)– Angle of turn-controlled tightening processes (see page 237)– Yield point-controlled tightening processes (see page 238)Besides standard tightening processes, special tightening processes can also be programmed in theBS350. They are characterized by:– A combination of various standard tightening processes– Execution of defined tightening cycles (multi-step tightening processes) to adjust the tightening processto the tightening (e.g. speed adjustment).Special tightening processes include:– Loosening/retightening process (explanation and example parameterization on page 242)– Self-cutting tightening process– Tightening of stop nuts/squeeze lock nutsSystem 350 | 3 608 878 040/05.2008