C620—1B型普通车床面广量大,至今仍在各行业中广泛应用。但该机床因结构和齿轮制造误差等因素,致使噪声很大。我厂有台72年的产品噪声竟高达到91分贝(A),治理后,使噪声下降到82分贝(A),取得了明显的效果。 C620-1B-type general-purpose vehicles a large number of large, is still widely used in various industries. However, the machine due to the structure and gear manufacturing error and other factors, resulting in a lot of noise. Our factory has 72 years of product noise as high as 91 dB (A), after treatment, the noise dropped to 82 dB (A), and achieved remarkable results.