US 4,309,809 AGranted

Machine tool with an automatic tool changing device

AssigneeBrother Kogyo Kabushiki Kaisha

InventorsMasaaki Yokoe, Mituo Kobayashi

Life of this patent

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Abstract

A machine tool having an automatic tool changing device wherein a tool magazine storing many tools is rotatably carried by, and movable with, a spindle head, and a desired tool among them can be automatically selected for being set in a spindle. Each tool is respectively held in a proper tool carrying arm swingably supported by the rotary disc which is indexed by an indexing device to be rotated to bring the selected tool to a corresponding position to the spindle. The selected tool is directly set in the spindle, while being held in the tool carrying arm, in accordance with a swing movement of the tool carrying arm from a first position to a second position. The tool carrying arm, which keeps holding the tool in such a manner as to be rotatable with the spindle while machining, can be restored to the first position by a return swing back to the magazine together with the operation finished tool.

Claims10

Dependent claims

A machine tool provided with an automatic tool changing device comprising:

(a) a frame,
(b) a spindle head mounted on the frame adapted for rotatably carrying a spindle having a tool receiving hole,
(c) a tool magazine mounted on the spindle head being adapted to be rotated about an axis intersecting the axis of the spindle at a fixed angle,
(d) a plurality of tool carrying arms supported by the tool magazine in a circular array equally spaced from one another, each of the arms being adapted to be swingable in a plane which includes the axis of the tool magazine and extending in a radial direction from the axis, each of said arms rotatably carrying a tool about an axis positioned in said plane,
(e) each of the tool carrying arms being provided with an annular bearing portion for carrying said tool rotatably about the axis thereof,
(f) holding means for normally holding the tool carrying arms in a first position in which the tool is detached from the spindle,
(g) indexing means operatively connected to the tool magazine for rotating and holding it in a first position in which the axis of a selected tool carried by a selected tool carrying arm lies in a plane including the axis of the spindle and the axis of the tool magazine,
(h) moving means for moving the selected tool carrying arm from the first position to a second position in which the selected tool is directly set in the tool receiving hole of the spindle and alternately from the second position to the first position so as to detach the selected tool from the spindle, and
(i) transmitting means for transmitting the rotating motion of the spindle to the selected tool set in the tool receiving hole of the spindle, said assembly permitting rotation of the selected tool set in the tool receiving hole while being non-detachedly carried by the selected tool carrying arm.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/128,899Filed 10 Mar 1980
Priority: JP 54-279409 Mar 1979
Granted: 12 Jan 1982
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B23B 31/261
Using mechanical transmission through the working-spindle: clamping the end of the toolholder shank
B23Q 3/15534
Storage devices; Drive mechanisms therefor: magazines mounted on the spindle
B23Q 3/15706
Of rotary tools: a single tool being inserted in a spindle directly from a storage device, i.e. without using transfer devices
Y10S 483/90
Tool changing: gripping portion engages tool simultanous with tool rotating in spindle