The Analysis of Noise Level at High-Speed Milling of Wood

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UDС

613.644

DOI:

10.17238/issn0536-1036.2015.5.146

Abstract

Noise is one of the major harmful production factors in a woodworking. Woodworking mill-ing machines have high noise level, exceeding sanitary standards, however data on noise characteristics of modern milling machines with high frequencies are practically absent. It is analysised the influence of the modes of cutting, breed of wood and number of teeths of a mill on the level and a range of noise at high-speed milling of wood is carried out. Research was conducted on the modern processing center with numerical program control with use of a measuring microphone and the analyzer. Record of 1/3 octava levels of sound pressure when processing preparations from a pine and an oak of two teeth and six teeth mills on various modes of cutting was made. Also record of background noise level in shop and the machine compressor was made. The analysis of experimental data showed that in a noise range with low frequencies of rotation the frequency of incision of teeths dominates. At high frequencies of rotation, when milling by a two teeth mill in a range the frequency of incision of teeths and frequency of rotation of a spindle dominate, and when milling by a six teeth mill only the frequency of rotation of a spindle. Noise level when milling an oak is higher, than when milling a pine. Noise level at high-speed milling on 2 … 17 dB exceeds background noise level in shop, thus, in most cases noise level when cutting lower than a noise level, the machine created by the compressor. At the most productive modes of cutting with use of a six teeth mill noise level exceeds background on only 3 … 6 dB that allows to tell about prospects of use of such mills at high-speed milling.

Authors

S.A. Cherepanov, Postgraduate student 

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, 163002 Arkhangelsk, Russia; е-mail: serg-edu@yandex.ru

Keywords

wood milling, noise range, level of sound pressure, frequency of teeths incision, cutting modes.

References

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