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CASE HARDENED STEEL GEARS Forging / Casting | Gear Grinding RESIDUAL STRESSES in CASE HARDENED STEEL GEARS

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CASE HARDENED STEEL GEARS Forging / Casting | Gear Grinding RESIDUAL STRESSES in CASE HARDENED STEEL GEARS GEAR SOLUTIONS MAGAZINE Your Resource for Machines, Services, and Tooling for the Gear Industry ISSUE FOCUS RESIDUAL STRESSES IN CASE HARDENED STEEL GEARS Forging / Casting | Gear Grinding RESIDUAL STRESSES IN CASE HARDENED STEEL GEARS COMPANY PROFILE STACE-ALLEN CHUCKS MAY 2019 MAY MAY 2019 gearsolutions.com Liebherr Performance. Liebherr Performance. NewNew gear gear skiving skiving machinemachine LKLK 300-500 Machine,Machine, tool tool and and processprocess fromfrom a singlesingle sourcesource In Inthe the LK LK 300 300 and and 500 500 gear gear skiving skiving machines, machines, process,process, tools andand machinemachine includingincluding tool tool changer changer and and automationautomation system system come come from from a a single single source source becausebecause in skiving³ thethe deliverydelivery of of an an integrated integrated solution solution for for the the customer customer is isof of primary primary interest. interest. Skiving³ Skiving³ is is especiallyespecially suitedsuited for internalinternal gearsgears of of medium medium size size and and quantity, quantity, as as it isit ismuch much faster faster than than shaping shaping and and more more economical economical thanthan broaching. TheThe machinemachine can can be be operated operated using using the the touch-based touch-based LHGe@rTec LHGe@rTec control control system. system. MachineMachine ToolTool ProcessProcess Automation Automation Design Design TechnologyTechnology design Deburring Deburring and and Manufacturing Manufacturing ImplementationImplementation tooltool changer changer Reconditioning Reconditioning OptimizationOptimization Stiffness Stiffness www.liebherr.com www.liebherr.com 2014-510_025 LVT_021_Skiving3_GB_A4_MH EMO+GE.indd 1 21.07.17 10:59 2014-510_025 LVT_021_Skiving3_GB_A4_MH EMO+GE.indd 1 21.07.17 10:59 POWER SKIVING & BROACHING HOBBERS INT/EXT WORM GRINDING GEAR GRINDERS AUTOMATED MACHINE TENDING GREAT IDEA! Precision Products for Gear Manufacturing www.toolink-eng.com 303-776-6212 MANDO G211 Segmented mandrel for gear cutting Segmented mandrel with slim interference contour Rigid radial clamping with pull-back effect We have all heard the phrase WORK SMARTER, NOT HARDER. Makes sense, right? In times of economic uncertainty, it’sLarge SMART clamping to maximize range the efficiency and vibration of every dampening one of your resources. due to vulcanized Workholding technology that allows you to go from O.D. to I.D. to 3-jaw clamping in a matter of seconds without readjustmentclamping can maximize bushings the production – and the profits – of your existing machines. Now that is WORKINGIn-stock SMARTER. standard segmented clamping bushings Three end-stop levels Integrated flushing channels 1.800.281.5734 Germantown, WI USA www.hainbuchamerica.com 2 gearsolutions.com FEATURES RESIDUAL STRESSES IN CASE HARDENED STEEL GEARS Gears machined from forged billet and as-received bar develop tensile residual stress in the core of the gear following full heat treatment. 28 By DAVID EASTON, CHRIS AYLOTT, BRIAN SHAW, and SALAH RAHIMI CHOOSING THE PROPER GRINDING WHEEL Experts with Norton | Saint-Gobain Abrasives discuss the challenges of 38 gear grinding and how advances in technology are improving the efficiency MANDO G211 of grinding methods. Segmented mandrel for gear cutting By KENNETH CARTER Segmented mandrel with slim interference contour THE PERFECT CROSSED-AXES GEAR PAIRS Rigid radial clamping with pull-back effect We have all heard the phrase WORK SMARTER, NOT HARDER. Makes sense, right? In times Gear scientists, engineers, and manufacturers have worked successfully of economic uncertainty, it’sLarge SMART clamping to maximize range the efficiency and vibration of every dampening one of your resources. due to vulcanized for many decades on finding the optimal flank forms and the optimal 42 Workholding technology that allows you to go from O.D. to I.D. to 3-jaw clamping in a matter of seconds without readjustmentclamping can maximize bushings the production – and the profits – of your existing non-conjugate flank surface interaction. machines. Now that is WORKING SMARTER. In-stock standard segmented clamping bushings By DR. HERMANN J. STADTFELD Three end-stop levels Integrated flushing channels CHUCKS, WORKHOLDING, AND MORE COMPANY PROFILE Although it started out manufacturing precision power 52 chucks, Stace-Allen Chucks has expanded into workholding – designing and manufacturing custom solutions to meet its customers’ demands. 1.800.281.5734 By KENNETH CARTER Germantown, WI USA www.hainbuchamerica.com May 2019 3 Manufacturers of: and Universal Gear Company 1605 Industrial Drive Auburn, CA 95603 Phone: (530) 885-1939 Fax: (530) 885-8157 4 gearsolutions.com MAY 2019 • VOLUME 16, NUMBER 5 DEPARTMENTS 8 INDUSTRY NEWS Reports, data, and developments to keep you aware of what’s happening with your colleagues in the gear-manufacturing industry around the country and world. AMB 2020 celebrating anniversary as metal Atlanta Gear Works grows field services with working exhibition. new vice president. In this section, the premier supporter of gear manufacturing in the United States and beyond shares news of the organization’s activities, upcoming American educational and training opportunities, technical meetings and seminars, Gear Manufacturers standards development, and the actions of AGMA councils and committees. 19 Association 24 TOOTH 26 HOT TIPS SEAT BRIAN DENGEL D. SCOTT MACKENZIE ACHIEVING ZERO-BACKLASH BACK TO BASICS: MARTEMPERING WORM-GEAR PAIRS TO REDUCE DISTORTION Unique duplex worm gear pairs This specialized process is more expensive that minimize backlash in reversing than normal quenching, but the benefits of applications. reduced distortion and reduction of rework worthwhile. 56 PRODUCT 64 SHOWCASE Q&A New products, trends, services, and developments in the gear industry. RESOURCES 62 MARKETPLACE 63 ADVERTISER INDEX DON ORTMANN Operations manager at Iosso Metal Processes COVER PHOTO: SHUTTERSTOCK Gear Solutions (ISSN 1933 - 7507) is published monthly by Media Solutions, Inc., 266D Yeager Parkway, Pelham, AL 35124. Phone (205) 380-1573 Fax (205) 380-1580 International subscription rates: $72.00 per year. Periodicals Postage Paid at Pelham AL and at additional mailing offices. Printed in the USA. POSTMASTER: Send address changes to Gear Solutions magazine, P.O. Box 1210, Pelham, AL 35124. Publications mail agreement No. 41395015 return undeliverable Canadian addresses to P.O. Box 503 RPO West Beaver Creek, Richmond Hill, ON L4B4R6. Copyright ©2006 by Media Solutions, Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage-and-retrieval system without permission in writing from the publisher. The views expressed by those not on the staff on Gear Solutions magazine, or who are not specifically employed by Media Solutions, Inc., are purely their own. All “Industry News” material has either been submitted by the subject company or pulled directly from their corporate website, which is assumed to be cleared for release. Comments and submissions are welcome, and can be submitted to [email protected]. May 2019 5 FROM THE David C. Cooper PUBLISHER EDITOR Chad Morrison ASSOCIATE PUBLISHER Forging/casting and gear EDITORIAL grinding take the spotlight Kenneth Carter EDITOR queezing metal into a mold to forge a gear or pouring hot metal into a mold to cast one Jennifer Jacobson Sare often two sides of a very important coin when it comes to creating gears. ASSOCIATE EDITOR That’s why Gear Solutions’ May issue focuses on these important processes of gear manu- Joe Crowe facturing. CONTRIBUTING EDITOR This month’s issue tackles that, as well as gear grinding — another vital part of making sure gears reach their final destination with the detailed specifications required of them. In our Focus section, we publish a technical paper on the residual stresses in case hard- SALES ened steel gears. In it, experts David Easton, Chris Aylott, Brian Shaw, and Salah Rahimi Chad Morrison discuss how gears machined from forged billet and as-received bar develop tensile residual ASSOCIATE PUBLISHER stress in the core of the gear following full heat-treatment. Dave Gomez On the topic of gear grinding, Josh Fairley and Phil Plainte with Norton | Saint-Gobain NATIONAL SALES MANAGER participate in a Q&A where they talk about the challenges of gear grinding and how advances in technology are improving the efficiency of grinding methods. Jim Faulkner REGIONAL SALES MANAGER In addition to those articles, a feature from Dr. Hermann J. Stadtfeld with Gleason focuses on why today’s hypoids are the perfect crossed-axes gear pairs. David Marlow And an issue of Gear Solutions wouldn’t be complete without the expert advice from our REGIONAL SALES MANAGER knowledgeable columnists. Each of our contributors always offer interesting information, Tom McNulty often conveyed in a unique fashion. REGIONAL SALES MANAGER Yes, May is finally here. Schools are about to be out, and the weather — if you live in my neck of the woods — is about to become unbearably hot. So, grab our latest issue and take it to the pool. It may not keep you cool, but the gear CIRCULATION information inside certainly is. Teresa Cooper As always, thanks for reading! MANAGER Jamie Willett ASSISTANT DESIGN Rick Frennea KENNETH CARTER, editor CREATIVE DIRECTOR Gear Solutions magazine Michele Hall [email protected] GRAPHIC DESIGNER (800)
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