siemens flender türkiye H2DV-5-C Helical gearboxes H2

Flender/Flender Gear Units/Helical gearboxes H2

alloid process which has an involute as the tooth trace and is therefore self- equidistant in every normal section. Because of the tilted root line, the Com- pleting method attains the desired constant slot width but tooth space width is tapered along the pitch cone (see Fig. 2.. Fig. 2.1 Tooth form variables [ ISO2 ] 1 tooth depth 2 tooth thickness 3 slot width (crown gear) 4 space width in the pitch plane2 2 Fundamentals of Bevel Gears Figure 2.1 shows the customary tooth depth variants, or depth wise taper, which are described briey below. The formulae for the associated angles are given inTables 2.1 and 2.1. Standard depth tooth depth is directly proportional to the cone distance at any particular section along the tooth. The extended root line intersects the axis of thebevel gear at the pitch cone apex. The extended tip line intersects the axis at different point, dened by the root line of the mating gear plus constant clearance. The sum of the dedendum angles of the pinion and wheel is not dependent on thetool radius. Most straight bevel gears are of the standard depth type. Constant slot width (Duplex) this tooth depth form occurs when the root line has to be tilted as required in the case of the Completing method, to obtain constant slot width in the normal section of the pinion and wheel (see Fig. 2.. The formulae in Tables 2.1 and 2.1 indicate that the tool radius c0has signicant Standard tooth taper Tilted root line taper Fig. 2.1 Principle of the tilted root line [ ISO2 ]. 1 Apex of the pitch cone Standard tooth taper Duplex tooth taper Constant tooth depth Fig. 2.1 Tooth depth wise taper. 1 mean whole depth, 2 mean addendum, 3 mean dedendum2.2 Gear Geometry 2 effect on the tilt angle of the root line. Too large tool radius being produces unreasonably small tooth depth at the toe and excessive tooth depth at the heel. As result, tooth tips become too thin at the heel and there is danger of undercutting at the root. It is therefore recommended