Researchers at the University of Duisburg-Essen in Germany
are investigating whether the load-life calculations for ball-screw actuators used routinely by engineers are applicable in machine designs that involve repetitive moves, short strokes, and quick thrust build-up over a fraction of revolution. "The equations were developed several decades ago when there were less sophisticated techniques available to determine the behavior of rolling elements and their impact on wear," says George Jaffe, Executive Vice President of Steinmeyer, Inc., a maker of ball screw actuators and motion systems. "Now we have the tools to develop more refined models that take into account things like the impact side loads, ball spacers, and various lubricants have on ball screw life." To support this effort, Steinmeyer is providing sample products and technical assistance to the research team. "Engineers can still use the existing equations, they just need to recognize that they're making a 'best estimate,'" says Jaffe.
The word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
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