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Author : John Edgar
Publisher : John Edgar
Page : 56 pages
File Size : 44,9 Mb
Release : 2024-07-01
Category : Technology & Engineering
ISBN : 8210379456XXX
Hobs and gear hobbing
Author : John Edgar
Publisher : Forgotten Books
Page : 58 pages
File Size : 47,7 Mb
Release : 2017-09-12
Category : Technology & Engineering
ISBN : 1528450655
Excerpt from Hobs and Gear Hobbing: A Treatise on the Design of Hobs and an Investigation Into the Conditions Met With Gear Hobbing The hobbing process for cutting the teeth in spur and spiral gears is beginning to be very widely used. The principle of this method is shown diagrammatically in the accompanying illustration. In the lower part Of the illustration is shown an imaginary rack (in dotted lines); this rack is in mesh with the gear, the teeth of which are to be formed, and if the blank could be imagined as made Of a plastic material, the rack, if moved along as indicated by the arrow, while the gear rotated to correspond, would form theoretically correct teeth in the gear blank. The teeth of this rack coincide with the outlines of the worm shown in full lines, this latter having been set at such an angle as to make the teeth on its front side parallel with the axis Of the gear. In other words, it has been set at the angle of its helix, measured at the pitch line. This worm, when properly fluted, forms the hob for cutting the gear teeth. It will be seen that the teeth of the hob, when set in this position, correspond with the teeth of the rack. If, now, the hob and blank be rotated at the ratio required by the number of threads in the hob and the number of teeth in the gear, this movement will cause the teeth of the hob to travel lengthwise in exactly the same way as the teeth of the imaginary rack would travel, if in mesh with the gear, the teeth of which are to be cut. It will thus be seen that the hob fulfills the requirements necessary for molding the teeth of the gear to the proper form. In practice the hob is rotated in the required ratio with the work, and fed gradually through it from one side Of the-face to the other. When it has passed through once, 'the work is completed. Of the great number of machines built during the past few years involving this principle, many are arranged for cutting Spiral gears as well as spur gears. Of course, all of the machines capable Of cutting spiral gears are capable of cutting spur gears also. The spiral gear-hobbing machine bears about the same relation to the plain spur gear-hobbing machine that the universal does to the plain mill ing machine. The added adjustments and mechanism required in each case tend to somewhat limit the capacity of the machine in tak ing heavy cuts although they add to its usefulness by extending the range of work It is capable of performing. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : Edgar John
Publisher : Unknown
Page : 128 pages
File Size : 42,7 Mb
Release : 1901
Category : Electronic
ISBN : 0243780060
Author : JOHN. EDGAR
Publisher : Unknown
Page : 0 pages
File Size : 55,9 Mb
Release : 2018
Category : Electronic
ISBN : 1033029874
Author : John Edgar
Publisher : Literary Licensing, LLC
Page : 50 pages
File Size : 51,8 Mb
Release : 2014-08-07
Category : Electronic
ISBN : 149814862X
This Is A New Release Of The Original 1914 Edition.
Author : John Edgar
Publisher : Unknown
Page : 54 pages
File Size : 40,6 Mb
Release : 2015-02-15
Category : Electronic
ISBN : 1297028546
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author : H J Watson
Publisher : Elsevier
Page : 380 pages
File Size : 42,6 Mb
Release : 2013-10-22
Category : Technology & Engineering
ISBN : 9781483157344
Modern Gear Production focuses on the processes and methods in gear making. The book first gives information on the history of gear making and types of gears. Topics such as the classification of gears based on the disposition of their shafts; shafts lying in the same plane with axes intersecting; and shafts lying in parallel planes but with axes inclined to one another are then discussed. The text describes gear groups, tooth forms, and gear materials. Heat treatment of steels, casehardening, nitriding, induction hardening, sulfinuzing, and flame hardening are explained. The book takes a look at blank manufacture, gear milling, and gear shaping and planning. The text further examines gear hobbing. Topics include precision of hobbing machines, worm-wheel hobbing, hob setting, control of accuracy of gears, and hobbing gears for general purposes. The different kinds of hobs, profile grinding, and shaving and lapping are also discussed. The book also focuses on other manufacturing methods, such as thread whirling, broaching gear teeth, tooth rounding, work hardening, and electrochemical machining. The text is a vital source of data for readers interested in gear making.
Author : Robert Endoy
Publisher : Society of Manufacturing Engineers
Page : 192 pages
File Size : 51,7 Mb
Release : 1990
Category : Gearing
ISBN : 0872633837
Everyone involved in gear design and production will benefit from the practical guidelines in this book. Refer to it on-the-job for tips on process selection process planning, cycle time formulas and calculations, speeds and feeds, and volume considerations. This book also includes many examples to make your process planning and cycle time estimating easier.
Author : United States. War Manpower Commission
Publisher : Unknown
Page : 10 pages
File Size : 52,7 Mb
Release : 1944
Category : Gear industry
ISBN : STANFORD:36105130089019
Author : Ivan Law
Publisher : Argusbooks
Page : 135 pages
File Size : 47,7 Mb
Release : 1988
Category : Gear industry
ISBN : 0852429118
Gears in one form or another are part of most mechanisms, but they are by no means as simple as they may appear. This book explains simply and comprehensively the underlying theory involved, and in its second part, how to cut gears on a lathe or milling machine.
Author : Stephen P. Radzevich
Publisher : CRC Press
Page : 1183 pages
File Size : 45,5 Mb
Release : 2017-10-16
Category : Technology & Engineering
ISBN : 9781351712217
Gear Cutting Tools: Fundamentals of Design and Computation, Second Edition, presents the DG/K-based method of surface generation, a practical mathematical method for designing gear cutting tools with optimal parameters. The text addresss gear cutting tool evolution, and proceeds to scientific classification for all types of gear machining meshes before discussing optimal cutting tool designs. Designs currently used and those being planned are covered, and the approach allows for development of scientific predictions and optimal designs. Solutions appear in analytical form and/or graphical form, with a wealth of new figures added, and new appendices offer additional data for readers.
Author : Zainul Huda
Publisher : CRC Press
Page : 301 pages
File Size : 45,5 Mb
Release : 2020-12-14
Category : Technology & Engineering
ISBN : 9781000284751
Machining is one of the eight basic manufacturing processes. This textbook covers the fundamentals and engineering analysis of both conventional and advanced/non-traditional material removal processes along with gear cutting/manufacturing and computer numerically controlled (CNC) machining. The text provides a holistic understanding of machining processes and machines in manufacturing; it enables critical thinking through mathematical modeling and problem solving, and offers 200 worked examples/calculations and 70 multiple choice questions on machining operations, as well as on CNC machining, with the eBook version offered in color. This unique book is equally useful to both engineering degree students and production engineers practicing in the manufacturing industry.
Author : Robert H. Todd,Dell K. Allen,Leo Alting
Publisher : Industrial Press Inc.
Page : 514 pages
File Size : 42,5 Mb
Release : 1994
Category : Science
ISBN : 0831130490
An abridgement of a 17-volume set of instructional materials, this guide offers brief descriptions of some 130 manufacturing processes, tools, and materials in such areas a mechanical, thermal, and chemical reducing; consolidation; deformation; and thermal joining. Includes numerous tables and illustrations. Annotation copyright by Book News, Inc., Portland, OR
Author : K. C. JAIN,A. K. CHITALE
Publisher : PHI Learning Pvt. Ltd.
Page : 918 pages
File Size : 46,7 Mb
Release : 2014-02-03
Category : Technology & Engineering
ISBN : 9788120347496
This thoroughly revised book, now in its second edition, gives a complete coverage of the fundamental concepts and applications of Production Engineering. Divided into six parts, the text covers the various theoretical concepts, design and process of metal cutting, the design and mechanism of various machine tools, and various aspects of precision measurement and manufacturing. The concepts and processes of metal working and the design of press tools, various modern methods of manufacturing, such as ultrasonic machining (USM), electrochemical deburring (ECD), and hot machining are also covered. A variety of worked-out examples and end-of-chapter review questions are provided to strengthen the grasp as well as to test the comprehension of the underlying concepts and principles. The text is extensively illustrated to aid the students in gaining a thorough understanding of various production processes and the principles behind them. The text is intended to serve the needs of the undergraduate students of Mechanical Engineering and Production Engineering. The postgraduate students of Mechanical Engineering and Production Engineering will also find the book highly useful. Key Features • Incorporates a new chapter on Grinding and other Abrasive metal removal processes. • Includes new sections on – Electric motors for machine tools in Chapter 18. – Production of screw threads in Chapter 22. – Linear precision measurement, surface finish, and machine tools in Chapter 23. • Presents several new illustrative examples throughout the book.
Author : W. H. Cubberly,Ramon Bakerjian
Publisher : Society of Manufacturing Engineers
Page : 1253 pages
File Size : 40,6 Mb
Release : 1989
Category : Technology & Engineering
ISBN : 9780872633513
The TMEH Desk Edition presents a unique collection of manufacturing information in one convenient source. Contains selected information from TMEH Volumes 1-5--over 1,200 pages of manufacturing information. A total of 50 chapters cover topics such as machining, forming, materials, finishing, coating, quality control, assembly, and management. Intended for daily use by engineers, managers, consultants, and technicians, novice engineers or students.