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目前,在汽车拖拉机行业里,大量生产箱体类零件用的自动线的生产率,同许多因素有关,其中与切削用量关系最大。本文即以最复杂的零件(发动机气缸体)为例,讨论一些国家所采用的切削用量及提高切削用量的一些措施。表1所列为哈尔科夫拖拉机发动机厂的自动线上主要工序的切削用量,该线由123台机床组成,在负荷率70％时,生产率为35件/小时,工作节拍时间T=1.2分钟。表1及其他各表均采用以下符号:D—刀具直径;L—加工长度;t—切削深度;v—切削速度;Sz—每齿进给量;S_O—每转进给量;S_M—每分钟进给量;T_机—机动时间;n—机床数;Z—刀具齿数。
Currently, in the automotive tractor industry, the productivity of automatic lines for the mass production of box-type parts is related to many factors, of which the relationship is most relevant to the amount of cutting. This article refers to the most complex parts (engine block) as an example to discuss some of the countries used cutting and cutting some of the measures to increase the amount of consumption. Table 1 shows the cutting costs for the main online automated process at the Kharkiv tractor engine plant consisting of 123 machine tools with a productivity of 35 pieces / hour at a load factor of 70% and a tact time of T = 1.2 minutes . The following symbols are used in Table 1 and in other tables: D-tool diameter; L-machining length; t-depth of cut; v- cutting speed; Sz- feed per tooth; S_O- feed per revolution; S_M- Minute feed; T_ machine - maneuver time; n - number of machines; Z - number of tool teeth.