The Theory And Practice Of Worm Gear Drives

by Dudás

• ISBN13: 9781903996614
• ISBN10: 1903996619
• Format: Paperback
• Copyright: 2004-07-06
• Publisher: Elsevier Science

Summary

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 field

Table of Contents

Foreword	xi
Professor F.L. Litvin
Preface	xiii
Acknowledgements	xvi
List of symbols	xix
Introduction	1	(6)
Classification of worm gear drives	4	(3)
A short history and review of the literature	7	(26)
A short history of the worm gear drive	7	(6)
Development of tooth cutting theory for spatial drives	13	(3)
Cylindrical worm surfaces	16	(10)
Helicoidal surfaces having arched profile	16	(10)
Cylindrical worm gear drives with ruled surfaces	26	(1)
Conical helicoid surfaces	26	(3)
Surface of tools	29	(1)
General conclusions based on the literature	30	(3)
Manufacturing geometry for constant pitch helicoidal surfaces	33	(91)
Development of manufacturing of cylindrical worm gear drives having arched profile	33	(28)
Analysis and equation of helicoidal surface having circular profile in axial section	35	(7)
Analysis of worm manufacturing finishing; an exact solution	42	(2)
Problems of manufacturing geometry during final machining of worm -- determination of grinding wheel profile	44	(17)
Investigation of geometric problems in manufacturing cylindrical helicoidal surfaces having constant lead; general mathematical -- kinematic model	61	(41)
Investigation of geometric problems when manufacturing cylindrical helicoid surfaces using general mathematical - kinematic model	64	(11)
Analysis of manufacturing geometry for conical helicoid surfaces	75	(27)
Geometric analysis of hobs for manufacturing worm gears and face-gears mated cylindrical or conical worms	102	(22)
Investigation of cutting tool for manufacturing worm gear mated with worm having arched profile	110	(14)
General mathematical model for investigation of hobs suitable for generating cylindrical and conical worms, worm gears and face gear generators	124	(58)
Application of general mathematical -- kinematic model to determine surface of helicoidal surface-generating tool for cylindrical thread surfaces	135	(1)
Machining geometry of cylindrical worm gear drive having circular profile in axial section	136	(12)
Machining geometry of spiroid drives	148	(14)
Intersection of cylindrical helicoidal surface having circular profile in axial section (ZTA) and the Archimedian thread face surface as generating curve of back surface	162	(7)
Generation of radial back surface with generator curve	164	(1)
Contact curve of the back surface and the grinding wheel	165	(4)
Manufactured tools for worm gear generation and other tools having helicoidal surfaces	169	(13)
Design and manufacture of worm gear milling cutters	169	(13)
Grinding wheel profiling devices	182	(18)
Devices operated according to mechanical principle	183	(3)
Advanced version of the wheel-regulating device operating on the mechanical principle	186	(5)
CNC-controlled grinding wheel profiling equipment for general use	191	(9)
Quality control of worms	200	(22)
Checking the geometry of worms	200	(4)
Determination of worm profile deviation	201	(3)
Checking of helicoidal surfaces on 3D measuring machines	204	(5)
Use of 3D measuring machines	206	(3)
Checking of helicoidal surfaces by application of 3D measuring device prepared for general use (without circular table, CNC-controlled)	209	(8)
Results of measurement of helicoidal surfaces	217	(5)
Manufacture of helicoidal surfaces in modern intelligent integrated systems	222	(38)
Application of expert systems to the manufacture of helicoidal surfaces	222	(5)
Problems of manufacturing worm gear drives	223	(1)
Structure of the system	224	(1)
The full process	224	(3)
Intelligent automation for design and manufacture of worm gear drives	227	(24)
Conceptual design of helicoidal driving mates	228	(17)
Manufacture of worms and worm gears	245	(6)
Measurement and checking of helicoidal surfaces in an intelligent system	251	(4)
Checking of geometry using coordinate measuring machine	253	(2)
Development of the universal thread-grinding machine	255	(4)
Review of thread surfaces from the point of view of thread-grinding machines	255	(1)
Manufacturing problems of thread surfaces	255	(2)
Requirements of the thread-grinding machine	257	(1)
Development of a possible version	258	(1)
Conclusions	259	(1)
Main operating characteristics and quality assessment of worm gear drives	260	(29)
Testing the meshing of the mated elements	260	(11)
Building in the mating elements	261	(1)
Adjustment and position checking of contact area	262	(9)
Checking the important operational characteristics of worm gear drives	271	(18)
Running in of the drives	271	(3)
Determination of optimal oil level	274	(1)
Investigation of warming up of the drives	274	(3)
Investigation of efficiency of drives	277	(3)
Investigation of noise level of drives	280	(9)
Summary of results of research work	289	(5)
References	294	(9)
Further reading	303	(28)
Index	331