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近年来,国外为提高圆锥滚子轴承外圈的车削加工效率,在刀具方面曾进行了一些试验,有的改进车刀刀片材料,有的改变车刀的结构形状,从材料与结构两方面改进以提高车削效率。 多点组合刀具 捷克斯洛伐克在研究提高大型圆锥滚子轴承外圈的加工,特别是提高内滚道车加工的效率时,设计了一种能一次车成滚道的多点组合刀具。 结构及几何参数:如图1所示,组合刀具有一个带锥柄的圆锥形刀体A,40把硬质合金车刀B分成五组,每组车刀与刀体轴线成75°螺旋形排列在刀体上,螺距不能调节,但排列的角度可在3°～5°内变动,这样排列的好处是可消除被加工材料中因组织不均而出现个别硬点时的振动影响,因而使工件得到较高的几何形状精度和加工表面光洁度。
In recent years, foreign countries to improve the outer ring of tapered roller bearings turning efficiency, the tool has conducted some tests, and some improve turning tool material, and some change the structure of turning tool shape, both from the material and structure to improve To improve turning efficiency. Multi-point tool combination Czechoslovakia in the study to improve the outer ring of large tapered roller bearings processing, especially to improve the efficiency of inner raceway car, the design of a car into a raceway multi-point combination of tools. Structure and geometric parameters: As shown in Fig. 1, the combination knife has a conical cutter body A with a taper shank 40, which divides the carbide turning knife B into five groups each having a 75 ° spiral with the body axis Arranged on the body, the pitch can not be adjusted, but the arrangement of the angle can be changed within 3 ° ~ 5 °, the benefits of this arrangement is to eliminate the material being processed due to uneven organization and the impact of vibration when the individual hard points, and therefore Make the workpiece get higher geometric precision and surface finish.