• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.15 no.5 s.98
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• pp.536-541
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• 2005

This paper Presents the performance test of an impact hammer drill in conjunction with the parameter consideration of coefficient of restitution, lubrication and friction, pressure leakage, vibration damper and production quality. Novel measurement setups are innovated in order to get the Parameter data. The measured data are compared with the computational results, and this comparison gives a confidence on the computational model, which can be used for a optimal design of impact hammer drills.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.11a
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• pp.333-336
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• 2004

This paper presents performance of the impact hammer drill with coefficient of restitution, lubrication and friction, pressure leakage, damper efficiency and the general quality test. The novel measurement systems are introduced in order to get the reasonable data. The mechanism of strikers with inner pressure is revealed in the general quality test. Due to these factors we are able to make the computational analysis correctly.