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Automatic-tool-changer

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Automatic tool changer

Details

Inventors: Kielma, Ervin J.;
Assignee: Kearney & Trecker Corporation (West Allis, WI)
Primary Examiner: Briggs; William R.
Assistant Examiner:
Attorney, Agent or Firm: Hajewski; Cyril M., Levy; Robert B.

An automatic tool changer for a machine tool having a rotary toolhead with cross-feed slide includes a tilt unit having a tool socket which is pivotal between a first position, parallel to the axis of a machine tool storage magazine to permit loading or unloading of a machine tool carrier into the tool socket from the tool storage magazine by a transfer arm, and a second position parallel to the axis of the rotary toolhead. A tool changer arm, having tool grippers at opposite ends, moves along and rotates about an axis parallel to the rotary toolhead to exchange the tool carrier in the tool socket of the tilt unit with the tool carrier in the rotary toolhead, thereby permitting a new machining operation to be performed by the machine tool as well as storage of the machine tool carrier previously held in the rotary toolhead.

DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS.
1 and 2, the automatic tool changer of this invention is used in combination with a rotary toolhead 10 which is rotatably mounted in a housing 12 for rotation about a horizontal axis 14 (FIG.
1).
Rotary toolhead 10 is rotated by an electric motor 16 (FIG.
1) which is mounted on housing 12 and is connected to rotary toolhead 10 by conventional gears (not shown).
Housing 12 is slidably mounted on horizontal ways 18 for movement along axis 14.
Ways 18 are supported by a bed 20.
Housing 12 is moved along ways 18 by a conventional electric motor and ballscrew drive (not shown) which are controlled by conventional control circuits (not shown).
A cross-feed tool slide 22 carrying a tool clamp 24 is slidably mounted on rotary toolhead 10 for movement along an axis 26 which is perpendicular to axis 14 (FIG.
1).
Tool slide 22 moves along ways 28 (FIG.
2) on the face of rotary toolhead 10 and is driven by an electric motor 30 (FIG.
1) which is coupled to tool slide 22 by conventional gears (not shown).
Motor 30 is mounted on rotary toolhead 10 and rotates therewith.
Hence the electrical power for motor 30 is applied thereto via slip-rings (not shown).
The previously identified co-pending patent application shows how the slip-rings are mounted and also shows the requisite gearing for coupling motor 16 to rotary toolhead 10 and for coupling motor 30 to tool slide 22.
Tool clamp 24 is adapted to receive and hold a standard toolholder carrying a tool for cutting a stationary workpiece (not shown) held by a conventional worktable (not shown).
The automatic tool changer of this invention is similar to the automatic tool changer disclosed in co-pending Patent Application, Ser.
No.
954,438 (now U.
S.
Pat.
No.
4,288,909), which was filed by Ervin J.
Kielma, Albin J.
Schabowski and John T.
Currer, for an "Automatic Tool Changer For Machine Tool".
The tool changer includes a tool storage magazine 30 which has a plurality of tool sockets 32 which are joined together by a chain 34 (FIG

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