Penton Press, London, 2000. XXII, 314 p. — ISBN 9781 9039 96614 — (Ultra Precision Technology Series).Worm gears are special gears that resemble screws, and can be used to drive other gears. Worm gears, enable two non-touching shafts in a machine to mesh (join) together.This publication, unique in that it combines both theoretical and practical design aspects, including the latest results of research and development, provides detailed treatment of the theory and production of worm drives, as well as the overarching subject of production geometry of helicoidal surfaces.Included are mathematical models for a number of practical applications; a description of dressing equipment required; treatment of inspection and measurement; the use of intelligent systems; worm gearing for power transmission; selection criteria.Covers theory and practice of the production and use of these common machine elements Ideal for researchers and engineers dealing with mechanical drives, gears and manufacturing The first single volume text in this diverse fieldContentsForeword Preface by Professor EL. Litvin, University of Illinois Acknowledgements List of symbolsIntroductionClassification of worm gear drivesA short history and review of the literatureA short history of the worm gear drive Development of tooth cutting theory for drives Cylindrical worm surfaces Helicoidal surfaces having arched spatial profile Cylindrical worm gear drives with ruled surfaces Conical helicoid surfaces Surface of tools General conclusions based on the literature Manufacturing geometry for constant pitch helicoidal surfacesManufacturing geometry for constant pitch helicoidal surfacesDevelopment of manufacturing of cylindrical worm gear drives having arched profile Analysis and equation of helicoidal surface having circular profile in axial section Analysis of worm manufacturing finishing; an exact solution Problems of manufacturing geometry during final machining of worm -determination of grinding wheel profile Investigation of geometric problems in manufacturing cylindrical helicoidal surfaces having constant lead; general mathematical -kinematic model Investigation of geometric problems when manufacturing cylindrical helicoid surfaces using general mathematical - kinematic model Analysis of manufacturing geometry for conical helicoid surfaces Geometric analysis of hobs for manufacturing worm gears and face-gears mated cylindrical or conical worms Investigation of cutting tool for manufacturing worm gear mated with worm having arched profileGeneral mathematical model for investigation of hobs suitable for generating cylindrical and conical worms, worm gears and face gear generatorsApplication of general mathematical - kinematic model to determine surface of helicoidal surface-generating tool for cylindrical thread surfaces Machining geometry of cylindrical worm gear drive having circular profile in axial section Machining geometry of spiroid drives Intersection of cylindrical helicoidal surface having circular profile in axial section (ZTA) and the Archimedian thread face surface as generating curve of back surface Generation of radial back surface with generator curve Contact curve of the back surface and the grinding wheel Manufactured tools for worm gear generation and other tools having helicoidal surfaces Design and manufacture of worm gear milling cuttersGrinding wheel profiling devicesDevices operated according to mechanical principle Advanced version of the wheel-regulating device operating on the mechanical principle CNGcontrolled grinding wheel profiling equipment for general useQuality control of wormsChecking the geometry of worms Determination of worm profile deviation Checking of helicoidal surfaces on 3D measuring machines Use of 3D measuring machines Checking of helicoidal surfaces by application of 3D measuring device prepared for general use (without circular table, CNC-controlled) Results of measurement of helicoidal surfacesManufacture of helicoidal surfaces in modern intelligent integrated systemsApplication of expert systems to the manufacture of helicoidal surfaces Problems of manufacturing worm gear drives Structure of the system The full process Intelligent automation for design and manufacture of worm gear drives Conceptual design of helicoidal driving mates Manufacture of worms and worm gears Measurement and checking of helicoidal surfaces in an intelligent system Checking of geometry using coordinate measuring machine Development of the universal thread-grinding machine Review of thread surfaces from the point of view of thread-grinding machines Manufacturing problems of thread surfaces Requirements of the thread-grinding machine Development of a possible version Conclusions Main operating characteristics and quality assessment of worm gear drivesTesting the meshing of the mated elements Building in the mating elements Adjustment and position checking of contact area Checking the important operational characteristics of worm gear drives Running in of the drives Determination of optimal oil level Investigation of warming up of the drives Investigation of efficiency of drives Investigation of noise level of drives Summary of results of research work References Further reading Index
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