Design and characterization of a vibrating tool for incremental sheet forming process

Piezoelectric actuators are characterized by high positioning accuracy, high stiffness and a fast response and are widely used in ultra-precision machining technologies such as fast tool servo technology and ultrasonic machining. The rapid response characteristics of piezoelectric actuators often determine the overall quality of machining. However, there has been little research on the fast response characteristics of piezoelectric actuators, and this knowledge gap will lead to low precision and poor quality of the final machining. The fast response characteristics of a piezoelectric actuator were studied in this work. Firstly, the piezoelectric actuator was divided into a no-load state and a load state according to the working state. A fast response analysis and output characteristic analysis were carried out, the corresponding dynamic model was established, and then the model was simulated. Finally, an experimental system was established to verify the dynamic model of the piezoelectric actuator’s fast response by conducting an experiment in which the piezoelectric actuator bounces a steel ball. The experimental results verify the correctness of the model and show that the greater the cross-sectional area and height of the piezoelectric actuator, the higher the bouncing height of the ball, and the better the dynamic performance of the piezoelectric actuator. It is believed that this study has guiding significance for the application of the dynamic characteristics of piezoelectric actuators in the machining field.

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Modeling of Rapid Response Characteristics of Piezoelectric Actuators for Ultra-Precision Machining

Metal flowing and microstructure characteristics of the micro inner gear ring fabricated by rheological extrusion

晶粒尺寸对Inconel 718薄板塑性微变形行为的影响:实验与建模

In order to solve the problem of machining micro-sized parts with complex shapes, a micro-blanking device is designed, which makes use of the characteristic that the output displacement of piezoelectric ceramics changes when the input voltage changes. The simulation analysis of micro internal gear blanking was completed by deform software, and the ideal internal gear parts were obtained. When the piezoelectric ceramics are deformed, a great driving load can be generated, and finally the micro internal gear parts are machined on the designed device. Compared with other equipment used for machining such parts, the designed device has the characteristics of good machining performance, low cost and high control precision.

Micro blanking processing method actuated by piezoelectric ceramic

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Micro blanking processing method actuated by piezoelectric ceramic