Software Technology Steel Spur Gears
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Frequencies and Properties of Compound Planetary Gears Material Study in Steel Spur Gears A Revelation in Advanced Software Technology SITE SAFETY COMPANY PROFILE: Larson Forgings TOOTH TIPS Q&A: Scott Lynch, American Bearing Manufacturers Association JANUARY 2008 2 GEAR SOLUTIONS • JANUARY 2008 • gearsolutionsonline.com JANUARY 2008 VOLUME 6 NO. 58 FEATURES companyPROFILE LARSON FORGINGS 16 BY RUSS WILLCUTT Now celebrating its 113th year in business, this fourth-generation, privately-held company is the culmination of a Swedish immigrant’s American dream. LOW-CYCLE BENDING FatiGUE OF AISI 9310 STEEL SPUR GEARS 18 BY RobeRT F. HANDSCHUH, TIMOTHY L. KRANTZ, BRADLEY A. LERCH, AND CHRISTOPHER S. BURKE This investigation—by members of the U.S. Army Research Laboratory, NASA’s Glenn Research p. 16 Center, and the QSS Group, Inc.—examines a raw material for steel spur gears. Natural FREQUENCIES AND MODAL PROPERTIES OF 26 COMPOUND Planetary GEARS BY RobeRT G. PARKER All vibration modes can be classified into one of three types—rotational, translational, and planet modes. In this article the author provides a detailed description. A Revelation IN Advanced SOFTWARE TECHNOLOGY 36 BY GEORGE NELSON This article describes a new software package that can increase productivity, decrease programming, setup, and cycle times, and lead to greater profitability. p. 18 DEPARTMENTS industryNEWS 8 New products, trends and developments in the gear-manufacturing industry. siteSAFETY TERRY MCDONALD 14 Now is the time to make sure your safety paperwork is current, so set some time aside to make an in-depth review of these important documents. toothTIPS WILLIAM CROSHER 15 Epicyclic gearing is a fascinating and useful system, but it’s important to understand how these p. 26 gears act with—and on—one another. 52 Q&A with SCOTT LYNCH, President and Secretary American Bearing Manufacturers Association INDUSTRY RESOURCES 45 MACHINES 48 MARKETPLACE 51 ADVERTISER INDEX 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 p. 36 Hill, ON L4B4R6. Copyright®© 2006 by Media Solutions, Inc. All rights reserved. gearsolutionsonline.com • JANUARY 2008 • GEAR SOLUTIONS 5 from the EDITOR PUBLISHED BY ere at the beginning of the new year we’d like to share with you some thoughts MEDIA SOLUTIONS, INC. penned by Valerie A. Forest, vice president of sales at Riverside Spline & Gear, P. O. BOx 1987 • Pelham, al 35124 1-800-366-2185 Inc. Titled “Who Signs Your Paycheck?” it’s a timely reminder as we all renew our 205-380-1580 fax commitment to providing excellent customer service: PUBLISHER Years ago, when I was just getting started with our company, my father asked me an DaviD C. COOPer important question. He wanted to know who signed my paycheck. My immediate reply was, “you do,” but I was wrong. The correct answer—and one I was told to never, ever VICE PRESIDENT forget—is that it’s the customer. The importance of your relationship with your custom- ers, whatever their sales volume, has to be of the utmost importance to you, and you ChaD mOrrisOn must work toward becoming their most-valued vendor. Everything you do is on their behalf, and you must pledge responsiveness in an open and honest manner from the national SALES MANAGER very beginning, including introducing them to and giving them the names of the people BraD Whisenant you work with. Helping them to understand your operation serves to create a sense of “partnership,” while also allowing them to feel more empowered when they work with OPERATIONS/CIRCULATION you. Look for ways to become more valuable to them as a whole. For instance, whether teresa hall it’s a price point or a delivery requirement, my response will most often be “let me talk with my ‘go-to’ people and see what they can do for us.” You can often detect their relief, because you are sharing the challenge they’re faced with—and we must always PRODUCTION remember that our customer also has a customer. By placing equal emphasis on every one of your customers’ concerns, you’ll be able to overcome just about anything. Work ART DIRECTOR to establish long-term relationships, because people change jobs, and you want them JeremY ALLEN to remember you in their new position. When an old friend recommends you to a new prospect, what a compliment that is! Excellent customer service really is one of your most valuable assets, because companies come and go, but people buy from people— GRAPHIC DESIGNER and that will never change. miChele hall HOur dedication to excellent customer service involves providing great content, as EDITORIAL you’ll find in this issue of the magazine, which includes “Natural Frequencies and Modal Properties of Compound Planetary Gears” by Robert G. Parker, a professor in EDITOR the Department of Mechanical Engineering at The Ohio State University—the first in a rUss WillCUtt three-part educational series by various authorities devoted to noise analysis. We’re also delighted to offer “Low-Cycle Bending Fatigue of AISI 9310 Steel Spur Gears,” written CONTRIBUTING WRITERS by Robert F. Handschuh and Timothy L. Krantz, who are with the U.S. Army Research ChristOPher s. BUrke Laboratory; Bradley A. Lerch, with NASA’s Glenn Research Center; and Christopher S. William P. CrOsher Burke, who is with the QSS Group, Inc. In addition, we’d like to welcome George Nelson Robert F. hanDsChUh of Bryant Grinder to our pages. Larson Forgings is our company profile, and Scott timOthY l. krantz Lynch—president of the American Bearing Manufacturers Association—is this month’s BraDleY a. lerCh Q&A subject. Bill Crosher provides another excellent installment of his “Tooth Tips” col- terrY mCDOnalD umn, and Terry McDonald does his usual great job of bringing important issues to the GeOrGe nelsOn forefront in “Site Safety.” Robert G. Parker We hope you’ll enjoy this issue of Gear Solutions, and that you’ll feel free to contact us whenever you have a story idea or press release. All best: No part of this publication may be reproduced or transmitted in any form Russ Willcutt, editor or by any means, electronic or mechanical, including photocopy, record- ing, or any information storage-and-retrieval system without permission Gear Solutions magazine in writing from the publisher. The views expressed by those not on the [email protected] staff on Gear Solutions magazine, or who are not specifically employed (800) 366-2185 by Media Solutions, Inc., are purely their own. All "Industry News" mate- rial has either been submitted by the subject company or pulled directly from their corporate web site, which is assumed to be cleared for release. Comments and submissions are welcome, and can be submitted to [email protected]. 6 GEAR SOLUTIONS • JANUARY 2008 • gearsolutionsonline.com FULL SERVICE Gear We do it all, from servicing, to retrofitting, to rebuilding, to designing custom machines. We also stock parts for all models. We are your one-stop source with more than 150 shapers in stock. Our machines are equipped with one- through six-axis controls. We have a dedicated professional staff with over a hundred years of combined experience in shaper needs and performance. We can handle your CAD/CAM through schematics to operational procedures. We have on staff electrical engineers who design all our custom software and we do all machined parts in house. We are truly your one-stop shop for everything in shapers. We own what we sell and we stand proudly behind everything we do. newenglandgear.com 343 John Downey Drive | P.O. Box 1120 | New Britain, CT 06051 | Phone: 860-223-7778 | Fax: 860-223-7776 New Products, Trends and Developments in the Gear-Manufacturing Industry Media Solutions Announces Promotion Gear Solutions Congratulates Winners Media Solutions, Inc., is pleased to announce the promotion of of GEAR EXPO Raffle Russ Willcutt to executive editor. Formerly managing editor of Hundreds of GEAR EXPO 2007 attendees signed up for a chance Gear Solutions magazine and Gear Solutions China, he will now to win Nike golf clubs in Detroit last October. The winners of a serve as editor of those publications while overseeing all edito- Nike Sumo driver were Doug Fellman of Engineered Abrasives; rial aspects of the company’s growing project base. Ken Keller of Engineered Tools Corporation; and Thomas Beach “We’ve been a team since we began planning the first issue of Peening Technologies. Todd Sakai of YMT of Gear Solutions, which was launched back in 2003, and we’re delighted to cement our relationship in this way as the company continues to develop exciting new publications in a wide variety of markets,” says David C. Cooper, presi- dent of Media Solutions, Inc. A graduate of the University of Alabama at Birmingham (UAB), Willcutt studied English, journalism, and art histo- ry, working in the university’s student publications group throughout his college years and winning a “Silver Crown Award” for copy editing from the prestigious Columbia Scholastic Press Association. He was then hired by his alma mater’s publishing division—creating and editing publications for many of UAB’s 12 Schools, including Engineering, Business, Education, Medicine, Dentistry, and Health Professions—while also serving as assistant editor of its flagship publication, UAB Magazine. He then joined THOMAS BEACH the HealthSouth Corporation as group managing editor of its publishing department.