Tooling exchange mechanism and machine tool having the tooling exchange mechanism

Patent metadata

Field	Value
Publication number	US-12427613-B2
Application number	US-202118020181-A
Country	US
Kind code	B2
Filing date	Sep 30, 2021
Priority date	Oct 13, 2020
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A tooling exchange mechanism and a machine tool having the tooling exchange mechanism, in which a load applied to a turret is reduced when exchanging a tooling in the machine tool, are provided with a pressing member 210 of a tooling detachment unit 200 that presses the rear end of a tooling holding unit 100 to be able to release the retracted state of a tool holder Th of a tooling T by a tool holder holding portion 150 of the tooling holding unit 100 , and a locking lever 220 of the tooling detachment unit 200 engageable with an engaging projection 112 a formed on the rear end side of the tooling holding unit 100.

First claim

The invention claimed is:

1. A tooling exchange mechanism for a machine tool comprising:
a turret mounted with a tooling holder detachably holding a tooling including a rotary tool for machining a workpiece and a tool holder for detachably holding the rotary tool; and
a turret support including a tooling detacher detaching the tooling mounted to the tooling holder from the tooling holder, wherein
the tooling holder mounted to the turret includes a tool holder holding portion for mounting the tool holder in a state where the tool holder of the tooling is retracted,
the tooling detacher of the turret support includes a pressing member that is movable forward and backward in the direction to the rear end of the tooling holder and a locking lever that is movable forward and backward in the direction parallel to the moving direction of the pressing member,
the pressing member of the tooling detacher is configured to press the rear end of the tooling holder to be able to release the retracted state of the tool holder of the tooling by the tool holder holding portion of the tooling holder,
the locking lever of the tooling detacher is engageable with an engaging projection formed on the rear end side of the tooling holder, and
the turret and the turret support are configured such that, after the pressing member of the tooling detacher comes into contact with the rear end of the tooling holder, while the locking lever of the tooling detacher detachment is engaged with the engaging projection of the tooling holder, the pressing member of the tooling detacher detachment is configured to move forward to release the retracted state of the tool holder of the tooling by the tool holder holding portion of the tooling holder so that the tooling can be exchanged.

2. The tooling exchange mechanism for a machine tool according to claim 1 , wherein the tooling detacher includes an elastic member configured to bias at least a portion of the tooling detacher toward the turret.

3. The tooling exchange mechanism for a machine tool according to claim 2 , wherein the turret and the turret support are configured such that, after the pressing member of the tooling detacher comes into contact with the rear end of the tooling holder, a reaction force which the pressing member receives from the tooling holder is greater than the biasing force of the elastic member.

4. A machine tool comprising:
a tooling exchange mechanism according to claim 2 ;
a spindle for rotatably gripping the workpiece; and
a tooling storage device for storing the tooling,
wherein the turret and the turret support are configured such that, after the turret is rotated to a predetermined tooling exchange position, the pressing member of the tooling detacher is configured to press the rear end side of the tooling holder forward, and the locking lever of the tooling detacher is configured to pull the engaging projection of the tooling holder backward.

5. A machine tool comprising:
a tooling exchange mechanism according to claim 1 ;
a spindle for rotatably gripping the workpiece; and
a tooling storage device for storing the tooling,
wherein the turret and the turret support are configured such that, after the turret is rotated to a predetermined tooling exchange position, the pressing member of the tooling detacher is configured to press rear end side of the tooling holder forward, and the locking lever of the tooling detacher is configured to pull the engaging projection of the tooling holder backward.

6. A machine tool comprising:
a tooling exchange mechanism according to claim 3 ;
a spindle for rotatably gripping the workpiece; and
a tooling storage device for storing the tooling,
wherein the turret and the turret support are configured such that, after the turret is rotated to a predetermined tooling exchange position, the pressing member of the tooling detacher is configured to press the rear end side of the tooling holder forward, and the locking lever of the tooling detacher is configured to pull the engaging projection of the tooling holder backward.

Assignees

• Citizen Watch Co Ltd
• Citizen Machinery Co Ltd

Inventors

• Aoyagi Atsushi
• Kitazawa Kazutoshi

Classifications

• B23Q3/12

  for securing to a spindle in general (B23Q3/152 takes precedence; chucks B23B31/02) · CPC title

• B23Q3/155

  Arrangements for automatic insertion or removal of tools {, e.g. combined with manual handling (B23Q7/046 takes precedence)} · CPC title

• B23B2231/50

  Devices to counteract clamping forces exerted within the spindle in order to release the tool or workpiece · CPC title

• B23B31/263

  by means of balls · CPC title

• B23B29/34

  Turrets equipped with triggers for releasing the cutting tools · CPC title