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7.4 曲轴的修理 7.4.1 轴颈表面抛光轴颈表面的光洁度相当高,椭圆度和锥度均在允许范围内而没有其它缺陷时,一般只需表面抛光,以延长轴颈和轴承的使用寿命和提高曲轴的疲劳强度。抛光的方法有手工的和半机械化的,下面介绍手工抛光方法: 将曲轴洗净,用布团将油孔堵塞。在宽度和轴颈长度相等的00号砂布的砂面上涂些滑油,将砂布卷绕于轴颈上,将两端向外折弯,然后用纱布带在砂布外面作螺旋状绕2-3匝(图53)。两手分别握住纱布带的两端,一拉一送的来回拉动纱布带,即带动砂布来回旋转,对轴颈表面进行抛光。每道轴颈约需10分钟。
7.4 Crankshaft Repair 7.4.1 Spindle Surface Polishing The surface finish of the journal is quite high. When the ovality and taper are within the allowable range without other defects, the surface finish is generally only required to prolong the service life of the journal and the bearing. Improve the fatigue strength of the crankshaft. Polishing methods are hand-made and semi-mechanized, the following manual polishing method: Wash the crankshaft, the cloth hole will block the oil hole. Lubricate the sand on the 00 size emery cloth with the same width and journal length, wind the emery cloth around the journal, bend the two ends outwards, and then use the gauze to wrap the emery cloth around the 2- 3 turns (Figure 53). Holding both ends of the gauze with both hands, respectively, pull the gauntlet back and forth with a pull, that is, led back and forth rotating abrasive cloth, the journal surface to be polished. Each axle takes about 10 minutes.