本文就XQ6225型万能回转头铣床的噪声状况及降低噪声问题作了较详细的研究。通过整机噪声频谱曲线与各噪声源的计算频率的对照,确定了主要噪声源,分析了影响主轴变速箱噪声的各种因素,提出了降低噪声的具体措施。 This article made a more detailed study on the noise condition and noise reduction of the XQ6225 universal rotary head milling machine. Through comparing the spectrum curve of the whole machine with the calculated frequency of each noise source, the main noise sources were determined, the various factors that affected the noise of the main shaft gearbox were analyzed, and the specific measures to reduce the noise were put forward.