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引言从十九世纪车削间世以来,切削刀具有了重大的发展。刀刃材料由碳素工具钢、高速钢、硬质合金到多涂层硬质合金,因而大大地提高了切削速度。刀具结构从整体车刀、焊接车刀、机械夹固式车刀到可转位式机夹快换车刀。它不但节省了刀刃材料而且节省了换刀时间及对刀时间。分析一下一年中生产时间的利用情况。真正用在切削金属上的时间只占6～22％,视加工批量而异,批量越大,所占比例愈犬。另外,刀具更换时间占7％,安装、调整时间占7％,刀具故障(刀具损坏)占6％,常白班和多班次时间的不完全利用占16～44％。其余,工件的装卸时间大约占
Introduction Cutting tools have undergone significant developments since the turn of the nineteenth century. Cutting edge material from carbon tool steel, high-speed steel, carbide to multi-coated cemented carbide, thus greatly improving the cutting speed. Tool structure from the overall tool, welding lathe, mechanical folder-type turning lathe to the turret machine can change quickly. It not only saves blade material but also saves tool change time and tool setting time. Analysis of the use of production time of the year. Truly used in the cutting of metal only 6 ~ 22% of time, depending on processing batch varies, the larger batch, the proportion of more dogs. In addition, tool replacement time accounted for 7%, installation, adjustment time accounted for 7%, tool failure (tool damage) accounted for 6%, often white shift and multi-shift times, incomplete utilization accounted for 16 to 44%. The rest, the workpiece loading and unloading time accounts for about