Abstract
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.
