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一、前 言 轴瓦质量的指标很多,现就轴瓦内表面粗糙度而言,国外轴瓦专业生产厂对轴瓦内表面加工是采用镗、拉并用,加工后轴瓦表面硬度在HV40以下,内表面粗糙度一般为:Ra=0.40～0.50μm; 在国内,轴瓦内表加工常用镗削工艺,仅极少数采用拉削,镗削后轴瓦内表面硬度在HV35以下, 内表面粗糙度一般为:Rα=0.80～1.00μm（上述均指铝锡合金轴瓦）。若选用静压精密镗床,在恒温条件下加工,内表面粗糙度可达到Ra=0.60～0.80 μm左右。
First, the foreword A lot of indicators of quality bushings, bearings are on the surface roughness, the professional production of foreign bearing bush on the inner surface of the processing is the use of boring, pull and use, after processing the bearing surface hardness below HV40, the average roughness of the inner surface Is: Ra = 0.40 ~ 0.50μm; In China, the internal boring pad machining boring process commonly used only a very small number of broaching boring after the inner surface of the bearing hardness of less than HV35, the inner surface roughness is generally: Rα = 0.80 ~ 1.00μm (the above are aluminum alloy bearing pads). If the use of static pressure precision boring machine, processed at constant temperature, the inner surface roughness can reach Ra = 0.60 ~ 0.80 μm or so.