Giant Magnetostrictive High-speed Dispensing Valve With Flexible Amplification Arm Study

Jet dispensing is a non-contact dispensing technology. It has some inherent advantages over traditional contact dispensing technology. Giant magnetostrictive material(GMM) is a new functional material and usually used on micro-displacement actuator. On the basis of other's research, this paper do some optimization research on a jet dispenser driven by giant magnetostrictive actuator. The main research work are as follows:1. The dispenser's mathematics model and emulational model are established. The comparison of measured data and simulation data demonstrates that the model can correctly reflect the dispenser's actual working situation.2. The coil and lever with flexure hinge is designed and optimized. The design method of the coil is introduced and a software used to design the coil is developed. The structure of the lever with flexure hinge is improved, the strained condition contrast of the former and current levers is presented, the mechanical strength checking methods of the two levers are presented respectively and the checking examples are given.3. Experiments on the dispenser's dynamics is carried out. Through analysing the displacement curve of the dispenser's needle, some problems are found, some methods on relocating the needle are presented, the problem that the dispenser can't jet steadily is solved perfectly, the dispenser's performance is improved obviously, the dispenser's working frequency has been promoted to above 200Hz from previous 35Hz.4. Some groping experiments on dispensing industrial art are carried out. The differences to the size of the fluid dots made by pulse width of control signal, driving current and gas pressure are researched, the fluid jetting process is observed under the help of the high frame vision system, some basic patterns dispensed are shown.