HANNOVER MESSE 2020, 20 - 24 April
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Powertools on the test bench

Logo Karlsruher Institut für Technologie


Karlsruher Institut für Technologie

Exhibitor details
Exhibitor details
Logo Powertools on the test bench

Product description

Hammer drills are indispensable helpers in everyday commercial life. A wide range of applications, such as interior construction, entail different stresses that need to be considered in product development. For each new generation of hammer drills, the interaction between the user, the machine and the substrate to be processed has to be evaluated in prototype test series. In the product development of hammer drills, extensive testing of cost-intensive prototypes currently involves a considerable effort. In manual tests, the prototypes are tested by users on concrete substrates. However, this user-based testing leads to considerable variance in the test results. Moreover, such tests are resource-intensive, for in addition to the users, tools and concrete have to be provided and they need to be properly disposed of. Alternative tests involving hydraulic substitute substrates yield only partially meaningful results, as the hydraulic system generates different damping forces on the hammer drill than hammer drilling in concrete due to the design and temperature. This results in divergent loads and bears the risk of inaccurate results. Scientists at KIT have developed a novel substitute substrate. Here, the hammer drill transmits the impact and drilling torque to an input shaft. A generic braking torque is applied via belt pulleys in combination with a brake motor, which simulates real torque progressions. The impact force is transferred to the impact absorber, consisting of grey cast iron cylinder and friction spring. There, the impact force is converted into heat by the damping properties of the machine elements. The substitute substrate reproduces the interactions between the hammer drill and the substrate realistically and reproducibly.

You can get an overview of this technology at KIT stand. Detailed information can be exchanged individually in contact with the responsible scientific employees of KIT after the industry fair.

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