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在超精切削加工中,被加工零件的塑性变形及刀具与工件之间摩擦产生的应力变形和热变形,是使零件的几何精度和表面光洁度下降的主要原因。因此降低切削力,减少切削热的产生,对超精切削来讲,是至关重要的。实践证明,在有相应冷却装置的情况下,实现切削深度(t)、走刀量(S)的微进给,是达到上述目标的一个途径。下面介绍一种实现切削深度的微进给机构—螺纹差动微进给刀台。这种刀台是根据螺纹差动原理设计的。其结构小巧、紧凑,制造容易、使用方便,可靠和通用性好,用于外圆或端面的微进给切削加工。
In the super-precision machining, the plastic deformation of the machined parts and the stress and deformation caused by the friction between the tool and the workpiece are the main reasons for reducing the geometric precision and surface finish of the parts. Therefore, reducing the cutting force, reducing the generation of cutting heat, in terms of super-precision cutting is crucial. Practice has proved that in the case of a corresponding cooling device, to achieve cutting depth (t), the amount of feed (S) of the micro-feed, is to achieve a goal of such a way. Here is a realization of the depth of the micro-feed mechanism - thread differential micro-feed knife. This knife is based on the thread differential principle design. Its structure is compact, compact, easy to manufacture, easy to use, reliable and versatile, for cylindrical or face micro-feed machining.