May 2019

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Feature Articles

Cutting Tool Dynamics
Meeting Today’s Requirements for High-Quality Gears

CTI Symposium USA 2019
The Past, Present and Future of Vehicle Electrification

Technical Articles

Prediction of Process Forces in Gear Honing
Gear honing is a highly productive process for the production of small and medium sized gears and is used mainly in the serial production of the automotive industry. The low robustness of the process is a particular challenge in gear honing. The consequences range from an inadequate gear quality to an early breakage of the honing tool. In order to describe the processmachine interaction, the machining forces must be known.

Generative Gear Milling
This paper outlines the basic principles of involute gear generation by using a milling cutter; the machine and cutting tool requirements; similarities and differences with other gear generative methods; the cutting strategy; and setup adjustments options. It also discusses the applications that would benefit the most: for coarse-pitch gears the generative gear milling technologies offer improved efficiency, expanded machine pitch capacity, decreased cutter cost, and a possibility for reducing the number of machining operations.

Design and Optimization of a Hybrid Vehicle Transmission
The paper is not the proof of a discovery, but it is the description of a method: the optimization of the microgeometry for cylindrical gears. The method has been applied and described on some transmissions with helical gears and compound epicyclic, used on different hybrid vehicles. However, the method is also valid for industrial gearboxes.

Departments

It's Not Your Father's Gear Business (Publishers Page)
The world is changing. I've just returned from the AGMA Annual Meeting in Scottsdale, AZ. Like always, it was a great opportunity to visit with peers, colleagues, customers and competitors in the gear industry. But this year's event was far more than just a chance to reunite with old friends. No, this year's annual meeting was also a wake-up call.

Product News (Product News)
The complete Product News section from the May 2019 issue of Gear Technology.

Application Factors (Ask the Expert)
A reader asks: I'd like to know about the different approaches and factors considered while determining the value of Ka in regards to the DIN 3990 and AGMA standards.

Calendar (Events)
The complete Technical Calendar from the May 2019 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the May 2019 issue of Gear Technology.

The Toys That Make Engineering Noise (Addendum)
Last year, Hot Wheels celebrated its 50th anniversary. While a writing gig in manufacturing and engineering probably sounded surreal to the 8-year-old version of this author, truth be told, he was obsessed with Hot Wheels and Matchbox toys for most of his childhood. Somewhere in a box in the basement there’s a 1967 Camaro and a 1953 Corvette that would still bring a smile to this face.