Gear Technology Manual

Module 6 - MANUFACTURE AND METROLOGY OF SPUR AND HELICAL GEARS

Now avalaible on CD-ROM

SYNOPSIS

This Module makes use of a number of gear formulae, all of which are explained, and in many cases derived, in Module 3.

CONTENTS

Reference axis
Basic manufacturing information needed
General
Tooth module m
Reference diameter dref and helix angle ß
Base circle diameter d_b
Depth of insertion of cutter and tooth thickness
Tolerance considerations
General
Rating
Kinematic accuracy
Backlash
Cost
Specification of tolerances
Classification
Elemental tolerances
Involute profile tolerances
Alignment (helix/lead) tolerances
Pitch tolerances
Radial runout tolerances
Composite tolerances
Dual flank composite tolerances
Single flank composite tolerances
Tooth thickness and backlash
Gear quality grades
Supplementary information
Classification of manufacturing processes
Classification by principle used
Generation
Form machining
Form moulding
Classification by tool type
Classification by machine construction
Survey of manufacturing processes
The hobbing process
The shaping and planing processes
Grinding processes for finishing
The tooth fillet Flat disc grinding principle (Maag)
Involute helicoid principle (Reishauer)
Single conical wheel principle (Hofler, Niles)
Form grinding (Liebherr, Pfauter-Kapp, Maag)
Producing hardened gears
General
Using the shaving process
Grinding
Hard (skive) hobbing
Choice of process
General
Availability
Expertise
Quantity and variety
Accuracy
Cost and machining times
Small involute and heliX modifications (reliefs)
Workholding
General
Eccentric running
Cutting distortion
Acknowledgements and references
Appendix 6.I Drawing information
Appendix 6.2 Start of active profile and length of roll
Appendix 6.3 Tooth thickness calculations
Appendix 6.4 Glossary of gear manufacturing processes

Index: - Gear Technology Manual
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