Kawasaki Jukogyo Kabushiki Kaisha

Masayoshi Zaitsu

Naohiro Otsuki

Takuya Ota

An end mill includes: a columnar tool body that rotates about a center axis; and outer peripheral cutting edges on an outer peripheral surface of the tool body, the outer peripheral cutting edges including a first outer peripheral cutting edge and a second outer peripheral cutting edge. A relief angle &#x3b8; of the first outer peripheral cutting edge changes to increase in an axial direction of the tool body from a bottom face that is one end of the tool body. A relief angle &#x3b8; of the second outer peripheral cutting edge changes to decrease in the axial direction from the bottom face.

End mill

A transfer apparatus includes first and second holding portions, a hand, a hand moving portion, and fluid pressure driving and control units. The control unit acquires an inter-holding portion distance between the first and second holding portions for holding a workpiece. The control unit makes the hand moving portion move the hand to a predetermined position such that the distance between the first and second holding portions becomes the inter-holding portion distance when the first holding portion moved by the fluid pressure driving unit is brought into contact with a contact portion provided at a work field, the predetermined position being located away from the contact portion. With the hand located at the predetermined position, the control unit makes the fluid pressure driving unit move the first holding portion to contact with the contact portion, and the control unit stops driving of the fluid pressure driving unit.

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Kakamigahara, Japan

Masayoshi Zaitsu