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用普通浮动铰刀加工钢件的内孔比较困难,尤其是孔的表面光洁度不易提高。我们将浮动铰刀的刀刃分成五个部分,即把孔的铰削加工分工成镗-铰-挤三个连续加工工步,在一次走刀中完成,保证了孔的加工质量。经多次加工油缸的内孔,证明这种多刃浮动铰刀(图1)在加工20～45号钢的内孔时,能大大提高孔的表面光洁度,并且孔的尺寸精度及几何形状精度都较普通浮动铰刀加工的孔高。一、刀具结构特点 (1)将浮动铰刀刀刃分成以下五部分:1)切削偏角为15°的切削刃;2)半径为R=0.1～0.2mm的圆弧过渡刃;3)偏角为1°30′的修光刃;4)3mm长的挤光刃;5)副偏角为2°10′的副切削刃。这样可把油缸内孔经过半精车后,在半径上留有的0.1～0.15mm
With ordinary floating reamers steel inner hole more difficult, especially the surface roughness of the hole is not easy to improve. We divided the blade of the floating reamer into five parts, that is, the reaming of the hole was divided into three consecutive processing steps: boring-hinge-extruding, which was completed in one pass to ensure the processing quality of the hole. After multiple processing of the inner cylinder bore, prove that this multi-blade floating reamer (Figure 1) in the processing of 20 to 45 steel bore, can greatly improve the surface finish of the hole, and the hole size accuracy and geometry accuracy Are more common floating reamer hole processing. First, the structural characteristics of the tool (1) The floating reamer blade is divided into the following five parts: 1) Cutting edge angle of 15 ° cutting edge; 2) Radius R = 0.1 ~ 0.2mm arc transition edge; A wiper edge of 1 ° 30 ’, 4) a 3 mm long wedge edge, and 5) a minor cutting edge angle of 2 ° 10’. This cylinder can bore through the semi-fine car, left in the radius of 0.1 ~ 0.15mm