Novel measurement method for dynamic characteristic of tool nose of micro-diameter milling tool

Abstract

The invention discloses a novel measurement method for the dynamic characteristic of a tool nose of a micro-diameter milling tool, which belongs to the field of micromachining. The novel measurement method is characterized by comprising the following steps of clamping the micro-diameter milling tool in a tool chuck of a main shaft, adopting a miniature pulse hammer to carry out shock excitation on the micro-diameter milling tool at a position point where a cutter handle is arranged, adopting a scanning laser doppler vibrometer to measure vibration displacement of a measuring point set on the milling tool, carrying out modal synthesis on vibration response through signal collecting and processing software, and acquiring the dynamic characteristic of the tool nose of the micro-diameter milling tool. According to the novel measurement method, the pulse excitation of the hammer is not applied on the tool nose position of the micro-diameter milling tool, so that the damage of the tool nose is avoided; the non-contact measurement is adopted, so that the method is applicable to the milling tool with smaller diameter, and on-line measurement can be realized. Compared with the traditional measurement method, the method adopts a pure experimental method to acquire the dynamic characteristic of the tool nose, so that higher measurement accuracy can be achieved, and meanwhile, the measurement method is simple in device and convenient to implement.

Description

technical field [0001] The invention relates to a method for measuring the dynamic characteristics of the tip of a micro-diameter milling cutter, which belongs to the field of micro-processing. Background technique [0002] Micro-milling has unique advantages in micro-machining technology because of its adaptability to various materials and the ability to process complex three-dimensional shapes. However, the dynamic instability caused by the processing system will significantly reduce the cutting efficiency and the processing quality of parts. Reducing the service life of cutting tools and machine tools has become one of the main bottlenecks that hinder this technology from exerting its advantages. In order to predict and control micro-milling chatter, it is necessary to accurately obtain the dynamic characteristics of the micro-diameter milling cutter tip. The size of the tool used in micro-diameter milling is small, the tool diameter is generally within 1mm, the tool len...

AI Technical Summary

Problems solved by technology

From the above analysis, it can be seen that the research on the dynamic characteristics of the tip of the micro-diameter milling cutter that has been published in the literature has various disadvantages in the establishment of the model. Comprehensive, software-simulated models that are too simple and measurements that are not precise enough

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