Brother Kogyo Kabushiki-Kaisha

Hiroshi Sakakibara

Kunio Hirota

Takeaki Sato

Syozo Aoshima

Naoyuki Sawai

Plastic working method and apparatus are disclosed. The plastic work such as forging is carried out by partial pressing contact of a die with a partial portion of a workpiece. The die is moved in a swinging or circular rocking fashion. The plastic working apparatus comprises a lower die for supporting the workpiece; an upper die swingably provided in a swinging plane about a predetermined position for relatively depressing the workpiece with respect to the lower die in accordance with the swing motion and for performing the plastic work to the workpiece in cooperation with the lower die; and a moving mechanism for relatively moving the workpiece and the upper die within the swing plane during the working operation. A plastic working method comprises the steps of; swinging at predetermined amplitudes the die arranged in confronted relations with the workpiece; and, relatively moving a center of the swing amplitudes of the die relative to the workpiece within its swinging plane, thereby performing the plastic work in response to a shape of a molding die portion of said die.

Growing community of inventors

Nagoya, Japan

Hiroshi Sakakibara