Method for measuring vibration performance of tool nose of micro-milling tool

Abstract

The invention discloses a method for measuring vibration performance of the tool nose of a micro-milling tool, which belongs to the field of micro processing. The method is characterized in that the micro-milling tool is clamped in the tool nose of a spindle, one end of a piezoelectric actuator is pasted on the tool handle of the micro-milling tool, and the other end of the piezoelectric actuator is connected with a high frequency force sensor pasted on a machine tool motion platform; a machine tool drives the micro-milling tool to conduct micro feeding to the piezoelectric actuator, certain precompression is applied between the piezoelectric actuator and the tool handle of the micro-milling tool, and the piezoelectric actuator generates shock excitation under the action of excitation of an externally-connected signal generator; and a laser Doppler vibrometer is adopted to measure the vibration performance of the tool nose of the micro-milling tool. The method provided by the invention has the advantages that harmonic excitation is only applied on the tool handle of the micro-milling tool, so that damage of the tool nose is avoided, the micro-milling tool with small diameter can be measured, the frequency is high, the vibration performance can be on-line measured, and the method is simple, easy and convenient to implement.

Description

technical field [0001] The invention relates to a method for measuring the vibration characteristics of the tip of a micro-milling tool, belonging to the field of micro-machining. Background technique [0002] Micro-milling processing technology is a cutting method that uses micro-milling cutters to achieve high-precision machining at ultra-high speeds, and has unique advantages in the processing of micro-3D parts. The dynamic instability phenomenon of cutting chatter often occurs in the micro-milling process. The machining chatter caused by the cutting system will significantly reduce the cutting efficiency and the processing quality of parts, and reduce the service life of tools and machine tools. In order to predict and control the machining chatter of micro milling, it is necessary to accurately measure the vibration characteristics of the tip of the micro milling cutter. In the macro-scale milling process, the vibration of the milling cutter tip is generally measured b...

AI Technical Summary

Problems solved by technology

From the above analysis, it can be seen that the research on the vibration characteristics of the tip of the micro-milling cutter that has been published in the literature has a large gap with the actual machining process when the model is established. The specific performance is that the boundary conditions are not easy to determine, the research scope is not wide enough, Poor practicability, incomplete consideration of milling processing conditions, and too simple model in software simulation

Images