Abstract
This paper presents an intensive study on the ergonomic design modifications for pneumatic percussive rivet tools, i.e. rivet hammers and bucking bars. Detailed discussions are provided on the vibration characteristics, measurements, and methods of analyzing the multiple impulsive signals generated by the rivet tools. Recommendations arising from the study include design modifications using a recoilless concept, as well as other mechanical improvements, both for the rivet hammers and the bucking bars. It was found that the vibration transmitted to the worker's hands can be reduced by using a nose bushing, a low-stiffness spring, a valve cushion, and a coated cylinder in the rivet hammer. In addition, the recoilless method used in the bucking bars appears to be effective in diminishing the vibration to the workers.
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