| US 7,500,297 B2 | ||
| Machining center | ||
| Satoshi Okada, Aichi pref. (Japan); Tomohiro Kintoki, Aichi pref. (Japan); and Masaki Tanase, Aichi pref. (Japan) | ||
| Assigned to Yamazaki Mazak Corporation, Aichi Pref (Japan) | ||
| Filed on Nov. 02, 2007, as Appl. No. 11/934,107. | ||
| Claims priority of application No. 2007-019639 (JP), filed on Jan. 30, 2007. | ||
| Prior Publication US 2008/0178447 A1, Jul. 31, 2008 | ||
| Int. Cl. B23B 27/00 (2006.01) | ||
| U.S. Cl. 29—27C [29/50; 409/203] | 5 Claims |
| 1. A vertical machining center having a table disposed horizontally and a processing unit disposed perpendicularly, wherein
the processing unit comprises a first main spindle unit disposed on a saddle, and a second main spindle unit having an axis
of movement that is parallel to the axis of movement of the first main spindle unit;
the first main spindle unit comprises a first processing head disposed rotatably around a B-axis orthogonal to a Z-axis and
a rotating mechanism that rotates the first processing head around the B-axis;
the second main spindle unit comprises a ram shaft controlled to move in a W-axis direction parallel to a Z-axis, a ram head
attached to a lower end portion of the ram shaft, and a turning head and a milling head replaceably attached to the ram head;
and
the ram head comprises a hydraulic clamp unit that replaceably supports the turning head or the milling head.
|