Three-dimensional elliptic motion generating method and device for diamond cutter

Abstract

The invention relates to a three-dimensional elliptic motion generating method and a three-dimensional elliptic motion generating device for a diamond cutter, which belong to the field of ultraprecise cutting and cutting of materials difficult to machine. The diamond cutter is directly driven by three piezoelectric stacks which are arranged vertically, the three piezoelectric stacks are pre-tightened by a pre-tightening bolt at the same time, and the pre-tightening forces of the three piezoelectric stacks are finely adjusted by three wedge mechanisms respectively; by actively controlling the initial phase of a three piezoelectric stack driving signal, the projections of the motion of the diamond cutter on an X-Y plane and a Y-Z plane are elliptic motions, and the projection of the motion of the diamond cutter on an X-Z plane is a reciprocating linear motion; and by regulating the parameters such as frequency and amplitude of the three piezoelectric stack driving signal, the automatic control over the three-dimensional elliptic motion track parameter of the cutter is realized. The method and the device are very simple, easy to implement and favorable for obtaining the optimal cutting machinability of the diamond cutter.

Description

technical field [0001] The invention belongs to the technical field of ultra-precision cutting and cutting of difficult-to-machine materials, in particular to a method and device for generating three-dimensional elliptical motion of a diamond cutting tool. Background technique [0002] Precision or ultra-precision parts with complex geometric features have a wide range of application requirements in many important fields. Diamond cutting is an important processing method to create complex geometric precision or ultra-precision parts, but one of the main difficulties at present is that the range of materials that diamond can cut is still very limited. For ferrous materials such as hardened steel and hard and brittle materials such as silicon carbide, diamond cutting tools have poor machinability, often resulting in severe tool wear, deterioration of machined surface quality, and reduced machining accuracy. In order to expand the range of diamond-cuttable materials, academia ...

AI Technical Summary

Problems solved by technology

To solve the existing difficulties in rod design, it is difficult to obtain the required high-order mode; the frequency of three-dimensional elliptical motion and other elliptical motion parameters depend on the nonlinear structural dynamic parameters of the cutter rod, it is difficult to control independently, and the problem of lack of flexibility

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