No matter whether it’s a drill or an oscillator, handheld power tools produce powerful vibrations. But a new anti-vibration system almost entirely eliminates that uncomfortable shaking sensation you get when using such tools: The FEIN MultiMaster oscillator vibrates up to 70 percent less and is only half as loud as its predecessor. Fraunhofer researchers developed the technology in collaboration with FEIN and will be presenting the system at Hannover Messe (Hall 2, Booth C22) from April 13 to 17, 2015.
If you’ve spent extended periods of time working with a drill or some other handheld power tool, you’ll know how quickly you’re longing to give your poor arms a rest. No wonder, either – such devices tend to vibrate a lot and be very loud. In the future, you’ll experience far lower vibrations when you want to drill, saw or sand something.
Researchers from the Fraunhofer Institute for Structural Durability and System Reliability LBF in Darmstadt teamed up with their colleagues at C. & E. Fein GmbH to develop a technology to dramatically reduce vibrations. “We examined how the system is set up and refined it so it can be applied to a range of handheld power tools,” explains Heiko Atzrodt, group manager at Fraunhofer LBF.
And this is precisely what FEIN has done to one of its oscillating power tools – in other words, a tool that doesn’t have a rotating action, but rather one that moves back and forth almost 19,500 times a minute. These and similar tools can do more than saw and sand; they are just as adept at rasping, polishing, shaving, cutting, severing, sharpening and filing – including at those hard-to-reach places.
Decoupling the housing from the motor
So how did the researchers manage to dramatically reduce how much handheld power tools vibrate? “Elastomer elements are used to decouple the housing from the motor and act like a form of mechanical suspension and insulation,” says Atzrodt. What this means is that only a tiny portion of motor vibrations are transferred to the housing and so to the user. You can, however, have too much of a good thing:
If the researchers were to insulate the housing too much, users would be unable to feel how hard they were pressing the tool onto whatever material they’re working with. So the researchers had to strike a balance between reducing vibrations and allowing users to retain a feel for what the tool is doing. This comes down to adjusting the stiffness of the elastomer elements.
First, the researchers used a simulation to determine the ideal stiffness range before integrating various suspension and insulation devices into a test system. This in turn allowed them to set the basic development parameters.
Up to 70 percent lower vibrations, 50 percent less noise
“By applying the anti-vibration system, FEIN was able to reduce vibrations by up to 70 percent compared to previous models,” says Atzrodt. “For almost all applications, the oscillator now belongs squarely in the zero vibration class.” Since this makes it permissible to work with this tool for up to eight hours at a time, technicians or autoworkers can now use it throughout their shift. The tool is also easier on the ears: Thanks to the new insulation, it now produces 50 percent less acoustic pressure.
This low-vibration oscillator is now on the market under the name FEIN MultiMaster FMM 350 Q. At Hannover Messe, the Fraunhofer LBF researchers will be offering visitors the chance to feel the difference for themselves by demonstrating the new-and-improved oscillator next to its predecessor.
Anke Zeidler-Finsel | Fraunhofer LBF
Fraunhofer HHI presents latest VR and 5G technologies at Mobile World Congress
19.02.2018 | Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut, HHI
Come Together: Teamwork Achieves Optimum Composite Design
14.02.2018 | Fraunhofer-Institut für Lasertechnik ILT
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
19.02.2018 | Materials Sciences
19.02.2018 | Materials Sciences
19.02.2018 | Life Sciences