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1962年6月3日,从巴黎起飞的一架客机,还沒有完全离开跑道就发生了事故。据第二天报紙报导,价值百万元的客机的事故,竞发生在仅值几分錢的操纵系統上的一个螺栓身上,原来这个螺栓的加工精度太差。这种“小零件闖大禍”的事是屡見不鮮的。可見,加工精度对于机器制造业,特別是对于精密仪器制造业的重要性是不容忽視的。所謂加工精度,就是指制造出来的机器零件,其各个参数,即尺寸精度、几何形状精度等与图紙所規定的相符合的程度。現在,随着工业生产
On June 3, 1962, an airliner taking off from Paris had not completely left the runway and an accident occurred. According to newspaper reports on the second day, the accident involving a million-dollar passenger plane took place on a bolt on an operating system that was only worth a few cents. The original bolt had a poor processing accuracy. This kind of “small parts of the disaster” is a common occurrence. It can be seen that the importance of machining accuracy for machine manufacturing, especially for precision instrument manufacturing, cannot be ignored. The so-called processing accuracy refers to the machine parts that are manufactured, and their respective parameters, that is, the dimensional accuracy, geometric accuracy, and the like are in compliance with the drawings. Now, with industrial production