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(四)自动线采用的切削用量及切削用量选择的原则切削用量是根据采用的工艺方法和要求的加工精度选择的,选择得正确与否不仅对加工质量和精度有很大的影响,而且对生产效率也有很大影响。为了提高自动线的生产效率、利用率和投资效果,在确定自动线方案时,对缩短占自动线节拍时间70～80％的切削时间极应予以足够的重视。由于新型刀具材料研制成功,近年来切削用量急剧地提高了,气缸体自动线的生产率竟达到了每小
(D) of the automatic use of cutting the amount of cutting and cutting the principle of choice of the amount of cutting is based on the use of technology and process requirements and processing accuracy of choice, the correct choice or not only on the processing quality and accuracy have a great impact, but also on the production Efficiency also has a big impact. In order to improve the automatic line production efficiency, utilization and investment results, in determining the automatic line program, to shorten the automatic line beat time 70 ~ 80% of the cutting time should be given sufficient attention. Due to the successful development of new cutting tool materials, the amount of cutting has rapidly increased in recent years, and the productivity of the automatic line of cylinder block has reached the level of small