A Turning Chatter Suppression Device Driven by Piezoelectric Ceramics

Abstract

The invention discloses a turning chatter suppression device based on a piezoelectric ceramic driver. The turning chatter suppression device comprises a tool rest, a flexible hinge, the piezoelectric ceramic driver, a front flange plate, a rear flange plate, a flexible connector, a vibrating sensor and a controller. The front end of the piezoelectric ceramic driver is connected with the rear end of the front flange plate through the flexible connector, the front end of the front flange plate is fixedly connected with the front end of the tool rest, and the rear end of the piezoelectric ceramic driver is fixedly connected with the rear end of the tool rest through the rear flange plate; the controlled is electrically connected with the vibrating sensor and the piezoelectric ceramic driver; the upper part and the lower part of the flexible hinge are provided with an elastic bending sheet respectively. When precision turning is carried out through the turning chatter suppression device, real-time online position regulation on a tool can be achieved; the turning chatter suppression device has the advantages of being simple in structure, high in rigidity, displacement control precision, response speed and output force, low in power consumption and the like, and can effectively suppress generation of turning chattering.

Description

technical field [0001] The invention relates to the technical field of turning processing equipment, in particular to a turning chatter suppression device driven by piezoelectric ceramics. Background technique [0002] Machining is an important part of parts manufacturing, and it is the key to ensure the geometric shape and position accuracy of the workpiece surface. Although metal cutting technology has made many advances, machining accuracy and machining efficiency are still trapped by the instability of the cutting process. An unstable cutting process can cause cutting chatter. Chatter is a self-excited vibration that results from the interaction between the dynamic characteristics of the cutting process and the modal characteristics of the machine-tool-workpiece system. In actual processing, the tool is no longer considered to be absolutely rigid, so cutting will inevitably cause deformation of the tool. Because the tool has both mass and stiffness, it vibrates. If t...

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that after the equipment is designed and processed, various performance parameters are fixed, which is bound to be restricted by the natural frequency of the main system to which it is attached. For example, some chatter vibrations are caused by the modal characteristics of the workpiece itself. However, the natural frequency of the workpiece is constantly changing due to the continuous cutting of metal during the cutting process, and the vibration absorption effect of the passive vibration absorber designed based on it will be limited

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