一、前言 金属切削机床广泛地应用于国民经济的各行各业,因此,对机床噪声的控制是环境保护的重要内容之一。目前,世界各工业发达国家要求在八小时的工作时间内,环境噪声连续暴露不得超过90分贝(A),这样就要求每台机床的噪声级不得大于85分贝(A)。我国机床标准规定,普通机床的噪 I. Introduction Metal cutting machine tools are widely used in all walks of life in the national economy, therefore, the control of machine noise is one of the important contents of environmental protection. At present, the industrialized countries in the world require that continuous exposure to environmental noise should not exceed 90 decibels (A) within eight hours of working hours, thus requiring no noise greater than 85 decibels per machine (A). China’s machine tool standards, the noise of ordinary machine tools