Abstract
In rock drilling, the drill head is loaded by a stress wave, which propagates from the drilling machine through the drill bit and its head into the underlying rock. A tungsten carbide insert is brazed into the steel drill head. The thin soldering layer has to withstand this stress during the whole service life of the drill bit. In this paper the influences of the geometry and material constants on the stress distribution in the drill head and especially in the soldering layer are discussed. An analytical theory is used, which was developed and experimentally verified in a previous paper [1].
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