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在着手进行振动钻孔、镗孔等各项准备工作中,首先是如何实现刀具或工件的振动,也就是确定何种型式的振动及其驱动装置。用带横刃的钻头(如麻花钻等)实心钻孔的情况下,切削刃上各点的切削方向是随着从外缘到中心而变化的。在横刃处,钻头轴线方向就是它的切削方向,振动钻孔时应当采用轴向振动;对于其它主切削刃,应采用圆周方向的振动。从这种钻头的整体来看,理应采用把轴向振动与圆周振动合组成一体的扭转振动。但实际使用上,为简化振动驱动装置,往往采用单一
In the preparations for vibration drilling, boring and other preparations, the first is how to achieve the vibration of the tool or workpiece, which is to determine what type of vibration and drive. In the case of solid drilling with a chiseling bit (such as a twist drill), the cutting direction of each point on the cutting edge varies from the outer edge to the center. At the chisel edge, the axial direction of the drill bit is its cutting direction and axial vibrations should be used for vibration drilling; for other major cutting edges, circumferential vibration should be used. From the overall point of view of such a drill, it is reasonable to adopt a torsional vibration in which the axial vibration and the circumferential vibration are integrated. However, the actual use, in order to simplify the vibration drive, often single