B3-FH-11-D ke PumpFanGMDENs cdd h AB Aff h hl G n nl eme p m Bevel-helical speed reduction gearbox B3

Flender/Flender Gear Units/Bevel-helical speed reduction gearbox B3

s. It is therefore measure of the variation in tooth slot width. Occasionally, individual run-out for either the right or left tooth ank is also obtained. There are no standard run-out tolerance values which are calculated from the appropriatepitch measurement and, consequently, quality rating cannot be assigned to it;given careful analysis, however, conclusions on the running behavior of bevelgear set can be obtained from it, as from the pitch itself. 7.1.5 Closed Loop Production 7.1.5.1 Fundamentals Series production of spiral bevel gears now takes place in closed loop control system. This technology aims to ensure uniform quality in the manufactured components such that nished bevel gear will match the computer design within close tolerances. Only an exact adherence to the tooth ank micro-geometryoptimized during the design phase can guarantee the validity of calculated pre-dictions relating to tooth contact, including load capacity, operational life and noiseemissions [ TRAP0 ], [LAND0 ]. In order to produce bevel gears within the tolerances, it is not enough to monitor the last step in the production process. All the process stepsfrom roughingthrough hardening to nishingneed to be controlled in terms of the quality of the semi-nished results in comparison to the desired specications. In the case of grinding, for example, it is important that the intended grinding allowance shouldactually be present and that it should be distributed evenly. The accuracy requiredfor the individual steps will naturally differ. The milling of gear which issubsequently ground will certainly not require the same accuracy as millingoperation prior to lapping. Closed loop production means that the production process is monitored on the basis of desired specications and tolerances for the individual steps, and that corrective interventions are made as needed. It should be remembered in this context that lapping, as hard nishing process with undened geometry, cannotbe closed-loop