Home | Advertise | Subscribe

Magazine | Newsletter | Product Alerts | Blog

August 2011

Archive > 2011 > August 2011

Download the August 2011 Issue in PDF format

Feature Articles

Chiming in on Gear Noise: Three Experts Have their Say
It is said that “The squeaky wheel gets the grease.” Ok, but what about gear noise? We talked to three experts with considerable knowledge and experience in this area.

Gear Material Risks and Rewards
Technology investments lead to product innovation at gear materials suppliers.

State-of-the-Art Broaching
There are a number of companies working to change the way broaching is perceived, and over the past 10 years, they’ve incorporated significant technological changes to make the process more flexible, productive and accurate.

Technical Articles

Super-Reduction Hypoid Gears
Super-reduction hypoid gears (SRH) are bevel worm gears with certain differences regarding hypoid gears. If two axes are positioned in space and the task is to transmit motion and torque between them using some kind of gears with a ratio above 5 and even higher than 50, the following cases are commonly known. Tribology Aspects in Angular Transmission Systems, Part VIII.

Benefit of Psychoachoustic Analyzing Methods for Gear Noise Investigation
This article provides an overview of the benefits of using psychoacoustic characteristics for describing gear noise. And with that, human hearing and the most important psychoacoustic values are introduced. Finally, results of noise tests with different gear sets aree presented. The tests are the basis for a correlation analysis between psychoacoustic values and gear characteristics.

Manufacturing Method of Large-Sized Spiral Bevel Gears in Cyclo-Palloid System Using Multi-Axis Control and Multi-Tasking Machine Tool
In this article, the authors calculated the numerical coordinates on the tooth surfaces of spiral bevel gears and then modeled the tooth profiles using a 3-D CAD system. They then manufactured the large-sized spiral bevel gears based on a CAM process using multi-axis control and multi-tasking machine tooling. The real tooth surfaces were measured using a coordinate measuring machine and the tooth flank form errors were detected using the measured coordinates. Moreover, the gears were meshed with each other and the tooth contact patterns were investigated. As a result, the validity of this manufacturing method was confirmed.

Departments

Namaste (Publishers Page)
In India, “namaste” is used as a common greeting. Although it translates literally to “I bow to you,” it’s often used the same way we use “hello” or “good-bye.” It’s a phrase commonly exchanged between individuals when they meet, and it’s also used as a salutation when they part. I’m using the phrase here because I’d like to introduce you to an exciting new project and venture for Randall Publications LLC.

Product News (Product News)
The complete Product News section from the August 2011 issue of Gear Technology.

No Shortage of New Technology at EMO Hannover (Events)
Metalworking technology specialists will be front and center for six days at EMO Hannover 2011 (September 19–24). More than 2,000 companies from 38 countries will be on-hand to show off products and services, spotlighting their performance capabilities.

Technical Calendar (Events)
The complete Technical Calendar from the August 2011 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the August 2011 issue of Gear Technology.

Doodling with Metal (Addendum)
Inside the mechanical mind of a gear artist.