A quarter-turn screw typically uses a spring feature to keep it in place when it is in a locked position. The attached components are firmly held in place, but under spring load, they can still move and are susceptible to loosening under vibration. In sealing applications, spring-loaded designs can be a problem because they don't provide a very tight joint.
This quick-insertion, quarter-turn screw clamps as well as a standard threaded screw.
This D-shaped threaded screw inserts and is held captive in a round clearance hole. The mating part uses a D-shaped hole to create a quick-insertion-type screw that, when rotated a quarter turn, engages the straight section of the D hole to provide a clamping force.
Bernie Leibman, Xerox Corp.,800 Phillips Rd., M.S. 111-06J, Webster, NY 14580; Tel: (716) 422-1294; Fax: (716) 422-3321; E-mail: Bernie.leibman@ usa.xerox.com.
Almost every automaker has had to 'pick a side' when it comes to alternative fuel options and ways to divest from a reliance on gasoline. Fiat is looking to back compressed natural gas or liquid propane as an interim solution.
Plastic may not be the most beloved of materials to the more environmentally minded, but Plasti 2012 aimed to mold a different opinion of the material in people's minds.
The rare earth element market has become steadily more rational, and new sources coming online will continue to reduce costs. Still, it is unlikely that prices will drop to their former lows.
Against a backdrop of mounting product complexity and a need to keep a lid on development costs, companies are recognizing a need to make simulation a more integral part of the design process. In response, vendors in the CAD world are building out CAE functionality as part of their CAD suites while simulation vendors are building tighter integrations to leading CAD tools. Keith Meintjes, Ph.D., Practice Manager, Simulation and Analysis at CIMdata, Inc., joins Design News CAD Editor Beth Stackpole in this radio program to explore the new face of integrated CAD and CAE, how companies are benefitting from this tighter partnership between platforms, and how integrating CAE earlier in the development cycle pays off in optimized product designs.
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