Istraživanje uticaja faktora dizajna na buku i vibracije u slučaju motornih testera za šumarstvo

Ján Kováč,Jozef Krilek,Miroslav Dado,Pavel Beňo

doi:10.5937/fmet1804513k

Abstract

In the recent time forest harvesting is mainly related to the use of chainsaws. They are acceptably light, safe, cheap and multifunctional. At the same time, chainsaws can cause personal illnesses considering their vibrations and noise. This article deals with conditions and assessment evaluation of effects on workers caused by vibrations and noise in the case of professional chainsaws in operation. Mechanical vibrations and noise are mainly related to the back-and-forth movement of the piston, and to a lesser extent, to the cutting chain. The experiment revealed, in general, that design parameters have a minimal influence on chainsaw vibration and noise emissions. Specifically, the statistical analysis for frequency weighted vibration showed no difference between types of guide bars, types of saw chains and wood plant in terms of noise and vibration on handles.

Highlights

Forest harvesting operation is undeniably a hard work with high risk of accident and health problem for its workers
Another factor which affects the vibrations emitted by chainsaws is the way the operators work with these machines. This problem was studied by [21], who tested vibration levels when cutting wood logs of different diameters with the upper and lower sides of the bar. These results proved that both the working techniques as well as the wood log diameters significantly affected the vibrations
The aim of presented article was to measure timeaveraged sound pressure levels emitted by chainsaw and to find interaction between noise emission quantity and type of cutter tooth [37]

Summary

INTRODUCTION

Forest harvesting operation is undeniably a hard work with high risk of accident and health problem for its workers. Results of experimental investigations performed by [9] showed statistically significant differences between the vibration levels and top plate filing angle values Another factor which affects the vibrations emitted by chainsaws is the way the operators work with these machines. This problem was studied by [21], who tested vibration levels when cutting wood logs of different diameters with the upper and lower sides of the bar. These results proved that both the working techniques as well as the wood log diameters significantly affected the vibrations

Hand – arm vibrations

MATERIALS AND METHODS

RESULTS AND DISCUSSION

CONCLUSION