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July/August 1994

Archive > 1994 > July/August 1994

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Feature Articles

Making the Most of Your Trade Show Visit: Avoid These 18 Common Mistakes
Going to IMTS? Beware. It's easy to make any number of common mistakes that can turn your productive buying trip into an expensive bomb.

AGMA Exec Speaks Out on ISO 9000
With all the heated debate and hoopla surrounding ISO 9000 certification, everyone seems to have an opinion about whether to sign up. Executives in the gear industry are flooded with information and ideas that often seem at odds. Gear Technology asked AGMA executive director Joe T. Franklin, Jr. to give an industry perspective on the pros and cons of ISO 9000 certification.

IMTS - Big Trade Show for the City of Big Shoulders
The biggest industrial trade show in the world this year - and the manufacturing machinery industry's most important marketplace - will be at McCormick Place in Chicago September 7 - 15.

Technical Articles

Computerized Hob Inspection & Applications of Inspection Results Part II
Flute Index Flute index or spacing is defined as the variation from the desired angle between adjacent or nonadjacent tooth faces measured in a plane of rotation. AGMA defines and provides tolerance for adjacent and nonadjacent flute spacing errors. In addition, DIN and ISO standards provide tolerances for individual flute variation (Fig. 1).

Effect of Extended Tooth Contact on the Modeling of Spur Gear Transmissions
In some gear dynamic models, the effect of tooth flexibility is ignored when the model determines which pairs of teeth are in contact. Deflection of loaded teeth is not introduced until the equations of motion are solved. This means the zone of tooth contact and average tooth meshing stiffness are underestimated, and the individual tooth load is overstated, especially for heavily loaded gears. This article compares the static transmission error and dynamic load of heavily loaded, low-contact-ratio spur gears when the effect of tooth flexibility has been considered and when it has been ignored. Neglecting the effect yields an underestimate of resonance speeds and an overestimate of the dynamic load.

Departments

Every Reason In the World to Go (Publishers Page)
IMTS 94, the Association for Manufacturing Technology's biennial machine tool extravaganza opens September 7 at McCormick Place in Chicago. As always, the size of this show is astonishing. Over 100,000 visitors, enough to populate a medium-size town, will converge on Chicago's lakefront to visit more than 1,200 exhibits spread over the entire McCormick Place complex.

Calendar (Events)
Complete calendar for July/August 1994.

The Frugal Certification Process (Management Matters)
Much about ISO 9000 is the subject of noisy debate. But on one thing almost everyone, true believers and critics alike, agrees: Getting ISO 9000 certification can be expensive. Companies can expect to spend at least $35,000 for basic certification and six-month checkup fees over a three-year period. These figures do not include hidden costs like time and money spent on internal improvements required to meet ISO 9000 certification. But the really big-ticket items in the process are employee time and the cost of bringing in outside consultants. Many ISO 9000 consultants charge upwards of $1,800 a day.