Research on Precision Blanking Process Design of Micro Gear Based on Piezoelectric Actuator

Abstract

In order to process micro scale parts more conveniently, especially the micro parts with complex shape, a new micro blanking equipment based on piezoelectric ceramic driving is proposed in this paper. Compared with other large precision machining equipment, the equipment cost has been greatly reduced. Using displacement sensor to detect the change of output displacement and feedback control piezoelectric actuator to control the change of relevant parameters, the control precision is high. The micro gear parts with diameter less than 2 mm are obtained through the blanking experiment on the experimental equipment. From the relationship between the obtained time and the punch output force, output displacement and die adjustment, it can be seen that the designed equipment has good processing performance and can complete the blanking forming of micro parts well.

Charge Estimation of Piezoelectric Actuators: A Comparative Study

“…For each value of A e presented in Tables 1-3, the voltage drop amplitude for type I estimators, A S-I , and their range of charge, q range-I , are nearly fixed across different excitation frequencies, f e . This is in agreement with finding (2) in Section 5, presented in (16), and is a substantial advantage. On the other hand, in type II estimators, for the higher values of A e presented in Tables 2 and 3, A S-II and q range-II decrease meaningly with an increase in f e ; however, the resistor changes with frequency according to (31) to maintain A S at 1 V. q range-I (µC) q range-II (µC)…”

“…In type I estimators, as to (16), in order to achieve a voltage drop amplitude of A S , for a given excitation voltage amplitude of A e , the sensing capacitor should be selected according to (23):…”

“…As for (15), VS is proportional to the excitation voltage, Ve; therefore, a bias (time independent component) in Ve leads to a bias in VS. In addition, considering Ae and AS as the amplitudes of sinusoidal Ve and VS, respectively, (15) leads to (16):…”

“…Piezoelectric actuators are the most precise, least bulky and most common actuators for micro/nanopositioning, and are anticipated to uphold their prime status for years [14,15]. Fine machining [16], manipulation of biological cells [17], scanning probe microscopy [18], and precise robotic surgery [19] are some applications of micro/nanopositioning with piezoelectric actuators or piezo-actuated micro/nanopositioning. The key task in piezo-actuated micro/nanopositioning is precise control of the actuator's position.…”

Finite Element Modeling and Test of Piezo Disk with Local Ring Electrodes for Micro Displacement

“…Piezoelectric ceramics possess the advantages of convenient control, high power density, high displacement resolution, fast frequency response, low power consumption, no noise, and strong anti-electromagnetic interference ability [1]. They have developed into a unique driving form in the field of precision drive and are applied in automatic assembly devices, micro-robot operation, micro-machinery manufacturing, precision optical adjustment, precision positioning, nano-machining and optical fiber operation [15][16][17][18].…”