抄録
In the drawing experiment of wire of 99.9% copper, the die is forced to vibrate by applying ultrasonics of 26 KHz in the direction of drawing. The results are as follows; 1. When the die is vibrated with ultrasonics, drawing force is reduced largely. 2. When the distance between die and pulley which rolls up the wire drawn is varied, the drawing force becomes a sinusoidal curve with respect to the variation of the distance. 3. The effects of ultrasonics for the reduction of the drawing force are decreased with the increase of drawing velocity or reduction ratio of sectional area of the wire. 4. The drawing force reduces with the increase of the amplitude of ultrasonic vibration induced in the die. From the experimental results, it may be concluded that a favourable method of using ultrasonics exists for making the drawing force small.
