Fanuc Corporation

Shinya Okamoto

Akihiko Fujimoto

Naoki Sato

Kunio Kojima

Hisao Ishii

Ryuji Suzuki

A fixed first sleeve and a movable second sleeve are arranged in a center through hole of a main spindle. Balls at the rear end of the second sleeve engage a recessed slope of the first sleeve and a recessed slope of a draw bar, thereby amplifying the urging force of a spring for urging the draw bar upward. Balls at the distal end of the second sleeve hold and pull in the head of the pull stud with the amplified force. The pull stud has an axial through hole and a hole that connects with the through hole and opens sideways. Compressed air passes through these holes, thereby cleaning the respective taper surfaces and end faces of the main spindle and a tool shank. Switching means is used to close the hole that opens sideways, whereby a cutting fluid is allowed to flow through the axial through hole only.

Tool clamping mechanism and pull stud

A telescopic cover, provided for a machine tool, which comprises a first member slidable between first and second positions along an axis and having first and second ends provided toward the first and second positions respectively, a second member provided beneath the first member stationary along the axis, and a feeding mechanism for moving the first member along the axis, the feeding mechanism being provided in a space beneath a horizontal plane substantially coincide with the top face of the second member. The telescopic cover comprises a pair of telescopic cover assemblies which are provided over the feeding mechanism so as to retract and extend along an axis when the first member moves along the axis. The pair of telescopic cover assemblies comprises a pair of first cover members attached to the first and second ends of the fist member to move with the first member, a pair of second cover members provided for the respective first cover members. The second cover members are slidable relative to the respective first cover members along the axis to retract into and come out of the respective first cover members. The second cover members are connected by a pair of connecting rods extending parallel to the axis.

Telescopic cover for a machine tool

Compound machine tool

Automatic tool changer

Telescopic cover apparatus

Growing community of inventors

Yamanashi, Japan

Shinya Okamoto