Yamazaki Mazak Corporation

Satoi Usuda

Satoshi Yoshinobu

Daisuke Ito

Kiyoshi Nishida

Masaya Satou

A vertical machining center includes a table, a tool spindle, an angle tool holder, a tool unclamping operation device, and a tool changer. The angle tool holder includes a shank, a spindle, a housing, a collet, a draw bar, and a spring mechanism. The shank has a shank axis and is rotatable around the shank axis. The spindle has a spindle axis perpendicular to the shank axis and is rotatable around the spindle axis. The tool unclamping operation device includes an angle tool holder rest, a hydraulic piston, and a restrictor. The angle tool holder is to be placed on the angle tool holder rest. The restrictor is disposed on the angle tool holder rest to restrict a portion of the angle tool holder and to receive force in a direction of the spindle axis which is generated in a case where the hydraulic piston presses the draw bar.

Vertical machining center

The invention provides an angle tool holder to be disposed on an attachment attached to a spindle head of a vertical machining center and holding the angle tool holder to enable five-face machining of a workpiece. The angle tool holder denoted as a whole by reference numberhas a shankinserted to a spindle of the main machine, wherein a rotation of the shankis transmitted via a gear transmission mechanism or the like disposed in a housingso that the direction of a drive shaft thereof is varied orthogonally to thereby drive the angle cutter. An armconnected to the housinghas three pull stud boltsdisposed thereon. The three pull stud boltsare arranged at 90-degree intervals, and are clamped simultaneously by three collet chucks out of the four collet chucks disposed on the attachment unit for five-face machining.

Angle tool holder for five-face machining

The present invention provides an attachment to be attached to a spindle head of a vertical machining center for gripping an angle tool holder and performing five-face machining. An attachment unitfor five-face machining comprises a ring-shaped cylinder memberfixed to a lower portion of a spindle head, and a clamp unitdirectly connected to a piston disposed in the interior of a cylinder member. The clamp unitis equipped with four collet chucksfor gripping a pull stud boltdisposed on an armof an angle tool holderattached to a spindle and drives an angle tool

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Inabe, Japan

Satoi Usuda