Yamazaki Mazak Corporation

Yasushi Manabe

Kazuki Uemura

Satoshi Okada

Tohru Yamamoto

Shingo Kizawa

Masakazu Suzuura

Masazumi Nakanishi

Yuji Kuramochi

A machine tool includes a table, a spindle head, a spindle, and an internal turning attachment. The internal turning attachment includes an attachment base, a body, and a tool holder. The tool holder has a tool mount surface to which a turning tool is detachably mounted. The tool mount surface provides a changeable tool mount angle with respect to a plane perpendicular to a spindle rotational axis in a state where the internal turning attachment is mounted to the spindle head. An angle between the spindle rotational axis and a vertical axis is to be larger than zero degree according to the changeable tool mount angle and is fixed while the turning tool contacts a workpiece in a case where the workpiece has a hole with a depth exceeding a length from a body upper portion to a tip end of the turning tool along the spindle rotational axis.

Machine tool

A slip ring is accommodated in a ram. The slip ring includes a fixed portionhaving a feed element connected to a power source and a movable portionelectrically connected to the feed element. The movable portionincludes a contactfor supplying electricity to a spindle unitand an electric device of a spindle head. After determining the position of a saddlein a Y-axis direction and the position of a table in an X-axis direction, the position of the spindle headabout a B-axis is determined. Then, the ramis moved along the Z-axis direction with the spindle unitrevolved about the C-axis, and, with a non-rotational cutting toolattached to the spindle unit, a hole is bored in a workpiece W on the table.

Method of boring work by 5-axis machining double-housing machine tool and 5-axis machining double-housing machine tool

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Niwa-gun, Japan

Yasushi Manabe