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一、提高机器寿命的意义目前有某些汽车、拖拉机、电机车、轧钢机、矿山机械及金属切削机床等在使用中,发现有些重要零件经过很短期限后就发生磨损或断裂;损坏严重的,有时在几十小时或几个月内就完全报发。图1a 是轧钢机中轧辊沿腰部的断裂及磨损;图1b是电车及电铲中花键轴沿根部的断裂;图1c 是汽车拖拉机中曲轴沿腹板及轴颈交界处的断裂;图1d 是各种转轴沿轴根的断裂;图1e 是高速动力齿轮沿齿根的断裂及沿齿顶的磨损;图1f 及 g 是螺纹沿牙根的断裂。
First, the significance of improving the life of the machine There are some cars, tractors, electric locomotives, rolling mills, mining machinery and metal cutting machine tools in use, found that some important parts wear or break after a very short period of time; serious damage , Sometimes in a few dozen hours or months on the full report. Figure 1a shows the breakage and wear of the roll along the waist in the rolling mill; Figure 1b shows the breakage of the spline shaft along the root in the tram and shovel; Figure 1c shows the fracture of the crankshaft along the web and journal at the tractor; Figure 1e is a high-speed power gear along the tooth root fracture along the tooth top and wear; Figure 1f and g is the thread along the root fracture.