Automatic tool changing device in machine tool
AssigneeBrother Kogyo Kabushiki Kaisha
InventorShoki Yasuda
Life of this patent
Estimating the term…
Abstract
An automatic tool changing device in a machine tool for automatically changing a tool at an automatic tool changing (ATC) region. A spindle head is disposed reciprocally movable between a machining region and the ATC region by way of a machine origin which is positioned at a boundary point therebetween. The device includes a control device having a concurrent execution means in which deceleration control to the spindle head toward the machine origin and the acceleration control for the subsequent movement of the spindle head away from the machine origin are taken place in overlapping relation.
Claims5
An automatic tool changing device in a machine tool, including a frame (12);
- a spindle head (24) provided to the frame and movable between a machining region and automatic tool changing region;
- a spindle (40) supported to the spindle head and rotatable about a rotation axis extending in a direction parallel to the reciprocating direction of the spindle head;
- a tool magazine (66) rotatably supported to the frame and having a plurality of grip portions (82) for holding a tool, the grip portions being arranged on a circumferential locations with respect to a rotation axis of the tool magazine;
- rotational indexing means (68,78,80,72,74,75) for rotating the tool magazine about its rotation axis and positioning one of the grip portions which holds a tool to a predetermined tool indexing position, tool transfer mechanism for permitting the grip portion brought to the predetermined tool indexing position to perform tool transfer operation relative to the spindle in accordance with the movement of the spindle head within the automatic tool changing region;
- orientation means for stopping rotation of the spindle and positioning the spindle at a predetermined angular position;
- machine origin restoration means for moving the spindle head positioned at one of the machining region and the automatic tool changing region toward a machine origin (Z0) located at a boundary between the machining region and the automatic tool changing region, and feeding means for feeding the spindle head from the machine origin to one of the improvement comprising:
- concurrent execution means (S403, S532) in which deceleration control (703, 709) to the spindle head (24) toward the machine origin (Z0) and the acceleration control (704, 710) for the subsequent movement of the spindle head away from the machine origin by the feeding means (S511, 512, 601, 604) are taken place in overlapping relation.
Dependencies are inferred from the claim text.