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本文讨论缓速进给磨削镍铝尼克合金,罗尔斯·罗也斯,规格C1023时,工件处于正常磨削和极限磨削情况下的温度和热量分配的问题;在正常情况下,测得工件的最高温度为100℃～120℃。叙述了预断工件温度分布的有限元素模型,并用实验加以验证;该模型需要由实验确定一个常数;叙述了在极限情况的“热潮”,其特点不仅在于工件温度由正常情况下典型的120℃突然升高到一次“热潮”时的1000℃数量级,而且在于磨削力的变化,特别是磨削力比率的变化。据论证:“热潮”时温度突然上升,只能解释为磨削区域内冷却液薄膜沸腾的跃迁。在正常情况下,发现磨轮将不到3％的消耗功率传给了工件,而在“热潮”时,该百分比估计要增加到约60％。
This article addresses the issue of temperature and heat distribution for slow feeding grinding of nickel-alumino-alloys, Rolls-Royce, size C1023, under normal grinding and extreme grinding conditions; under normal conditions, The maximum temperature of the workpiece is 100 ℃ ~ 120 ℃. A finite element model for predicting the temperature distribution of workpieces is described and validated experimentally. The model needs to be experimentally determined by a constant. The “boom” at the limit is described, which is characterized not only by a sudden drop in temperature of the work piece Up to the order of 1000 ° C up to a “boom”, but also in the variation of grinding forces, in particular the ratio of grinding forces. It is argued that when the boom suddenly rises in temperature, it can only be interpreted as the transition of the coolant film boiling in the grinding area. Under normal conditions, it was found that the grinding wheel delivered less than 3% of the power consumed to the workpiece, whereas in the “boom” the percentage was estimated to increase to about 60%.