1绪言 大型箱休零件,如机床床身、齿轮变速箱等镗孔的精度,往往是影响机器工作质量的重要因素。从机床、工具、工件与工人技术水平四个镗孔参数来看,在工艺基准与工艺过程安排合理的情况下,变化最大与影响最甚的乃是工具参数。 影响镗孔质量的工具参数很多,但是最突出的是镗孔 1 INTRODUCTION Large box break parts, such as machine bed, gearbox and other boring accuracy, often affect the quality of the machine an important factor. From the machine tools, tools, workpieces and technical level of the four boring parameters point of view, the process of reference and the process of reasonable arrangements, the greatest changes and the most affected but the tool parameters. There are many tool parameters that affect the quality of the boring, but the most prominent ones are boring