在机械加工中,孔加工所占比重约为30%以上。孔加工刀具对工件加工质量、生产率和成本影响很大。由于孔加工刀具局限于孔内工作,刀具的尺寸和结构受到孔径的限制,加工时,又要求刀具具有一定的定心、导向能力。有较好的切削性能、能容屑和排局及充分冷却润滑,以保证必要的加工质 In machining, the proportion of hole processing is about 30%. Hole machining tools on the workpiece processing quality, productivity and cost a great impact. Because the hole machining tool is limited to work in the hole, the size and structure of the tool is limited by the hole diameter, and also requires the tool to have a certain centering and guiding ability when machining. Have better cutting performance, can be chip and exhaust and cooling and lubrication to ensure the necessary processing quality