Rexroth Tightening System 350 System Documentation - Rhino ...

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202/316 Bosch Rexroth AG | Tightening Technology 9 Tightening Processes9.1 Overview9.1 Overview9.1.1 GeneralYou can do the following in the BS350 operating system:– Create new tightening programs under File → New → Tightening programs– Load tightening programs from an existing file (*.prx) under File → Open– Insert a tightening program from an existing file (*.prg) under Edit → Insert– Load tightening programs from the tightening controller for editing under Process → Tighteningprograms.You can program a total of 48 tightening programs and 1 loosening program (program no.99), each with max. 40 tightening steps.After sending, tightening programs are processed in the controller.NoteVarious definitions of terms related to tightening programs can be found in chapter 1, “About This Document”from page 7.Note Detailed information on sending data can be found in chapter 8, “Basic Commissioning” from page 171!9.1.2 Definition: Target, monitoring, additional functionTarget, monitoring, and additional functions are differentiated between in the tightening steps.9.1.2.1 Target functionThe target function is the relevant control function within a tightening step (e.g. torque with torque-controlledtightening processes). The tightening step is ended once the target parameter (= set value) hasbeen reached. In addition to the permanently activated 1st target function, it is also possible to activate a2nd target function. If two target functions are activated, the first target function that is reached ends thetightening step.9.1.2.2 Monitoring functionOne or more monitoring functions can be activated within a tightening step. They watch the tighteningprocess in the tightening step. The monitoring parameters (=limit(s) of the monitoring functions) are thebasis for tightening step evaluation. Monitoring parameters can be assigned upper and lower limits (e.g.T+ and T–), as well as only one limit (e.g. Torque max. value, Tightening, upper, Tightening, lower).Evaluating and switching monitoring functions are differentiated between.Evaluating monitoring functionsWith evaluating monitoring functions, all of the attained tightening results (e.g. torque, angle of turn) arecompared at the end of the step to all of the monitoring functions assigned to the tightening step. Thetightening step is evaluated as OK if the actual values from all the monitoring functions are within the stipulatedmonitoring parameters. The tightening step is evaluated as NOK if one or more limits have beenexceeded. Limit violations occur in the following cases:– Upper limit: Actual value ≥ monitoring parameter– Lower limit: Actual value ≤ monitoring parameterSwitching monitoring functionsSwitching monitoring functions always contain a function to be evaluated. Additionally, they end the tighteningstep prematurely (i.e. before reaching the target function) as NOK if a monitoring parameter is violated.Whether it is an evaluating or switching monitoring function is determined via the corresponding checkbox(for the standard tightening step (see page 214); for the extended tightening step (see page 218).System 350 | 3 608 878 040/05.2008
9 Tightening Processes Tightening Technology | Bosch Rexroth AG 203/3169.2 Tightening program steps9.1.2.3 Additional functionsAdditional functions have an influence on the tightening process (e.g. start suppression, speed setting)but cannot interrupt it. They do not carry out an OK/NOK evaluation.9.2 Tightening program stepsThe tightening program always begins with a start step and ends with an end step; both are already assignedin the BS350. Various tightening steps, identical steps, or auxiliary steps can be inserted betweenthese two steps. Selection, number, and order of these tightening steps and auxiliary steps depend onthe required tightening process. New steps are always inserted in the tightening program before a selectedstep.The following table provides an overview of the steps available in a tightening program in the BS350.Table 9–1: Steps available in a tightening program in the BS350Display Designation Explanation See pageStart step Start of tightening program (see page 204)Standard tightening stepThese tightening steps control the (see page 210)tightening spindle and thus the tighteningExtended tightening step process.(see page 214)Synchronization rework stepSynchronization stepSynchronization steps can only be usedin conjunction with a KE (not relevantfor the CS351).Jump step Auxiliary steps. (see page 227)NOK branch step (see page 226)Conditional input branch step (see page 230)End step End of the tightening program. (see page 231)System 350 | 3 608 878 040/05.2008
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