Transcription of The Gear Hobbing Process - Gear Technology
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The Gear Hobbing Process - Gear Technology
:38 GEARTECHNO~OGYThe gear HobbingProcessDennis ,GimpertK'oepfer America Limited Partnership"South Hobbing is a generating proces .The termgeneratingrefers to the factthat the gear tooth form cut is lIotlllcconjugate form of the cutting tool,lhehob. During Hobbing both the hob and theworkpiece rotateilla continuous [)uringthis rotation, the hobitypically fed axiaUywithallthe teeth beinggradually formed as the tool traverses the workface (see ).FOIl"a spur gear being cut with a single starthob, the workpiece will advance one tooth foreach revolution of the cutter. Wilen bobbing atwenty-tooth gear " the hob will rotate twentytimes, while the workpiece will rotate profile is formedbythe equally spacedcutting edgesaroundthehob, each taking sue-cessive cuts on the workpiece, with the work-piece ,in a slightly different po ition for eachcut (see Fig.]
also correct the problem of gear tooth bending under load, Gears which will be finished by a subse-quent operation, such as skiving, shaving or grinding, may require clearance in the gear tooth fillet area for the finishing tool. This can be cut using a "protuberance" hob. which will-Fig. 3 Whole Depth of Cut t Topping Fig.4 Gear Toolh Fig. 5 ...
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