Makino Milling Machine Company, Ltd

Shinji Koike

Kazumasa Nakayasu

Kazuya Mayumi

Satoshi Kobayashi

Shinichi Inoue

Yoshitaka Yamaguchi

Takeshi Kawada

Rintaro Nagatomo

A machine tool includes: a bed, the upper surface of which has the table provided thereon; a cut debris duct which is provided so as to extend rearward from a cut debris discharge opening open at the center, in the left-right direction, of the rear face of the bed, and which discharges cut debris from within the bed to outside of the machine tool; a bifurcated vertically movable body which vertically moves along a pair of vertical guides, and which straddles the cut debris duct, the pair of vertical guides vertically extending on the rear face of the bed at positions on both the left and right sides of the cut debris duct; and a pair of left and right feed screws which extend parallel to the vertical guides, and which move the vertically movable body along the vertical guides.

Machine tool

According to the machine tool according to the present invention, a top-bottom guide is attached to a back surface of a base frame. By being guided by this top-bottom guide, the lifter moves in the top-bottom direction with respect to the base frame. A drive source which drives rotation of a top-bottom feed screw which extends parallel to the top-bottom guide is attached to a back surface of the base frame. This drive source is coupled with a bottom end of the top-bottom feed screw. As a result, compared to when the drive source is coupled with a top end of the top-bottom feed screw, the center of gravity of the machine tool can be set to a lower position. In this way, a machine tool can be increased in stability.

A machining center includes a rotatable tool magazine () arranged above a work space (WS) facing a spindle () tilted so that the spindle side becomes lower and having a plurality of grippers () for holding tools () in a circumferential direction, and a shutter () arranged below the tool magazine () to be able to open and close facing the spindle side. The tool magazine () has a tool-free area (AR) where there are no grippers () at a part of the circumferential direction and a tool-holding area (ARA) where there are grippers () at another part of the circumferential direction. The tool magazine () is controlled in rotation so that when the shutter () is closed, the tool-free area (AR) moves to the spindle side while when the shutter () is open, the tool-holding area (AR) moves to the spindle side.

Machining center

A machine tool for machining a workpiece with a tool moved relative to the workpiece is provided with a bed () providing a base, a column () vertically mounted on the bed (), and a carriage () having supporting columns (and), disposed on either side thereof, for oscillatably supporting a table (), the carriage being oriented so that one () of the supporting columns (and) is positioned adjacent the column () and the other () of the supporting columns is positioned away from the column ().

The present invention relates to a machine tool ( ) for machining a large-sized workpiece ( ) such as aircraft parts mounted on a workpiece mounting table ( ), by moving a spindle having a tool mounted thereon in directions along the X-axis, the Y-axis and the Z-axis. The machine tool ( ) can provide a highly efficient, high-speed and highly precise machining for a large-sized workpiece ( ) and solve a problem of a compact installation area. In order to solve this problem, according to the present invention, a workpiece support structure ( ) is disposed in opposed relation to a spindle support structure ( ) which a spindle head ( ) movable in the directions along the X-axis, the Y-axis and the Z-axis. The workpiece mounting table ( ) of the workpiece support structure ( ) is provided with pallet securing means on two opposed pallet mounting surfaces thereof and is supported to allow for rotational indexing about a horizontal axis extending in the direction along the X-axis. The workpiece ( ) is machined by setting one of the pallet mounting surfaces in a horizontal state to mount a pallet ( ) thereon and then by positioning the pallet ( ) in a vertical state by rotational indexing means.

Machine tool system and method of replacing pallet of the device

A numerically controlled machine tool is disclosed including a spindle support structure for moving the spindle having a tool mounted thereon in directions along an X-axis, a Y-axis and a Z-axis, a workpiece support structure having an indexing workpiece mounting table, and a chip discharge means located between the spindle support structure and the workpiece support structure for discharging chips produced in the machining area to the outside. Since the workpiece mounting table is allowed for rotational indexing, the setup process for the workpiece can be performed with the workpiece mounting surface of the workpiece mounting table facing upward, and therefore the setup process can be shortened while at the same time improving the machine operating rate. Also, since the spindle support structure, the workpiece support structure and the chip discharge means can be configured separately from each other, the machine tool can be manufactured and installed easily.

Numerically controlled machine tool

The invention relates to a rotating shaft apparatus for rotationally driving a spindle or a feed screw shaft and a machine tool including the rotating shaft apparatus, and is directed to enhance durability of a rotating shaft apparatus if the rotating shaft such as a spindle or a feed shaft rotates at a high speed. In order to solve the problem, according to the invention, a rotating shaft is rotationally supported by a bearing to a housing, the bearing being previously applied to or filled with a lubricant. A lubricant impregnated member, which is impregnated with a lubricant to be supplied to the bearing, is provided in the rotating shaft. The lubricant is separated and discharged from the lubricant impregnated member by centrifugal force due to the rotation of the shaft. The lubricant is supplied to the bearing through a lubricant supplying passage which is provided for fluidly connecting a space in or adjacent the bearing to the lubricant impregnated member,

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Kanagawa, Japan

Shinji Koike