抄録
Recently, creation of micro and highly functional product is demanded in many areas, and then many researchers are carrying out studies concerning about forming of those micro components. For this purpose a ballistic range by which an ultrasonic forming can be done is developed in this research. Micro piercing with high aspect can be performed in a high speed forming through various speed effects. For example material which situates in the direction of tool advancement is heated locally and adiabatically and becomes soft locally, buckling of a punch is hard to occur in order that a forming energy is transformed from a kinematical energy of a flying punch.
