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MDA Technologies 3/2016

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MDA Technologies 3/2016

screw. The key to making

screw. The key to making this solution a reality was Schaeffler’s many years of experience with complex manufacturing technologies, specifically forming techniques. That solution is now known as the PWG differential roller screw. The key to making the PWG a reality was to produce its spindle and planet gears by forming (rolling) instead of grinding - which is the time-consuming, wasteful, and expensive process ordinarily used to manufacture traditional roller screws. So why not use forming instead of grinding for all roller screws? The short answer: forming threads is extremely difficult. Unless it is done right, forming is not as precise as grinding away material. And if the threads are not sufficiently precise, then the points of contact between the planets and spindle may not line up properly, which ultimately diminishes the system’s load capacity. Thanks to Schaeffler’s remarkable engineering prowess and decades of experience manufacturing high-precision products using complex forming technologies, the electromechanical actuator may be well on its way to displacing the venerable hydraulic system in more than just a few applications. And at the core of this revolution is the PWG differential roller screw, with its ingenious combination of affordability, high load-carrying capacity - and high power density! Photographs: Schaeffler www.schaeffler.com About Schaeffler Schaeffler’s PWG differential roller screw - whose spindle and planets are manufactured using forming, instead of traditional grinding, methods - is characterized by a very high power density The Schaeffler Group is a leading global integrated automotive and industrial supplier. The company stands for the highest quality, outstanding technology, and strong innovative ability. The Schaeffler Group makes a key contribution to “mobility for tomorrow” with highprecision components and systems in engine, transmission, and chassis applications as well as rolling and plain bearing solutions for a large number of industrial applications. The technology company generated sales of approximately EUR 13.2 billion in 2015. With around 84,000 employees, Schaeffler is one of the world’s largest family companies and, with approximately 170 locations in more than 50 countries, has a worldwide network of manufacturing locations, research and development facilities, and sales companies. keeps you up to date www.mda-technologies.com www.facebook.com/ mdatechnologies www.google.com/ +Mda-technologies www.twitter.com/ MDA_Technology www.vimeo.com/ channels/ mdatechnologies Follow us online! MDA Technologies 3/2016

Linear motion with power and precision In harsh industrial environments, like in the painting systems of the automotive industry, linear drive ‘dryspin’ lead screw units with high helix thread ensure precise motion and positioning. A s a specialist in drives, Aris Stellantriebe GmbH is renowned among manufacturers and users of valves. Founded in Bonn in 1973, the company provides a wide range of drives for rotary motion, which operate with maximum accuracy even under adverse environmental conditions. The precision is required, for example, to regulate the gas and air supply to the furnaces accurately in the ceramics industry. Because, the process and product quality can be significantly impaired even with a deviation of a few degrees Celsius from the set point at a temperature level of 1 200 °C. The same is true for many processes in the chemical and process engineering. For demanding applications Aris Stellantriebe provides products such as the “Tensor” series that allows automation of valves and monitors the process at the same time, by detecting the actuating MACHINE ELEMENTS MDA Technologies 3/2016