The CMC Hybrid Roller Screw (HRS) is a low
friction recirculating roller screw that converts the rotary motion of a motor
into linear motion. The HRS incorporates a recirculating roller design;
however, the roller positioning is actively controlled allowing the HRS to
achieve rotational speeds that are comparable to traditional planetary roller
screws. The standard HRS delivers 10-20 percent more load capacity and higher
efficiencies than comparable planetary systems. The HRS can be integrated into
any product where lead screw based systems are employed or can replace any
mechanical, hydraulic or pneumatic positioner. The simplicity of the HRS is
exceptionally elegant. This simplicity allows for significant system
replacement of current technology, enabling end users to take advantage of the
higher load capacities in a similar or smaller envelope. Weight reduction is
critical in applications such as aerospace. The increase in force density that
the CMC HRS affords allows realistic replacement of hydraulic and pneumatic
systems where environmental considerations are paramount. Further, the system
is configurable to enable application specific solutions to be designed and
applied rapidly, providing remarkable flexibility. Mechanically, the HRS
couples the advantages of both planetary and recirculating roller screw devices
into a single element. Synchronization gearing is eliminated in the HRS, thus,
improving overall system efficiency compared with traditional planetary
systems. The rollers maintain active positioning within the nut body enabling
exceptional rotational speed. Further, the components within the CMC system are
conventionally machined, affording an extraordinary value in consideration of
total cost of ownership.
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.
Designing and filling a new type of water bottle might take less engineering work, but the description will help kids understand how science, math, and engineering influence their lives even through things that seem mundane.
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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