Rim-portion stress is defined by cone angle beta after compression, the materila used, and thickness, t. Consequently, during compression the outer rim portions of the disk encounter most of the stresses, which are essentially torsional.
With a 15-degree cone angle, CLOVER/DOME™ reportedly enhances compression control in nut-and-bolt assemblies, and reduces torque-control requirements for gasket installations.
Forming a clover disk into a dome-shape permits coil spring replacement in space-constrained applications, and provides a lower spring rate with more defection than Belleville washers. Spring function depends on the deflection of three equally spaced disk segments that minimize stress under compression, and are connected by the outer rim portions of the disk.
Outer and inner diameter is dependent on an optimal ratio, OD/ID = 2.6 to 2.8. A lower ratio results in higher stresses and requires decreasing angle beta to remain within allowable stress limits. The width of the rim portion and the geometry of the projecting disk segments can be modified to achieve virtually any spring rate. As the spring is compressed, the ID will be reduced by the cosine of the cone angle beta.
William P. Meade, CLOVER/DOME™ Products, Franklin Sq., Box 2386, Chapel Hill, NC 27515; Tel: (919) 933-0640; Fax: (919) 933-0800; E-mail: THGMeade@mindspring.com.
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Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.