研究期間：10108~10207;The application of ultrasonic vibrations superimposed on wire drawing, deep drawing and upsetting has been both theoretically and experimentally developed in the literature [3-7,9-10,12-15], but no attempts have ever developed by superimposing it to the die in blanking process experimentally. The only theoretical investigation into the effect of ultrasonic vibrations superimposed to the die in the blanking process was due to Yeh et al. [2], who reported that the edge quality of blanked product can be significantly improved. Therefore, the main objective of this proposal is to investigate experimentally the effect of ultrasonic vibrations superimposed on the quality of blanked product, including the development of appropriate mathematical model which can be used to determine a set of optimum parameters for the blanking process. One of the objective of the proposal, however, is to experimentally verify the validity of the result obtained using a finite element method in Yeh et al. [2]. To achieve the objective above mentioned, the surface response methodology based on design of experiments will be employed to plan all experimental alternatives. The blanking speed, the clearance between die and punch, and the feeding angle, all having three distinct levels, will be chosen as working parameter considered in the experimental alternatives. A set of blanking die with an ultrasonic vibration device will be developed in order to carry out the experiments. The experimental result obtained with and without ultrasonic vibrations superimposed will be compared and discussed other to investigate the effect of the ultrasonic vibration on the edge quality of blanked products. By doing so, it is expected that sufficient information on the quality of blanked products can be obtained from a number of experiment carried out as less as possible, and thus the objective of this proposal can be achieved very economically. This is also consistent with the goal generally required by industries.
