US-12617051-B2 - Magazine and machine tool

US12617051B2US 12617051 B2US12617051 B2US 12617051B2US-12617051-B2

Abstract

A magazine includes: a first driving mechanism unit that rotates tool pots so as to position, at a first position, an identifier in a tool pot placed at a transportation position different from a magazine-side tool change position and so as to position, at a second position, an identifier in a tool pot placed at the magazine-side tool change position; and a second driving mechanism unit that moves a reading device so as to position the reading device at a third position when reading the identifier by the reading device and so as to position the reading device at a fourth position when transporting the tool pots.

Inventors

Isao Hikita
Kenichi MIZUKOSHI
Nobuhiko HIRAIWA

Assignees

DMG MORI CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20210204
Priority Date: 20200720

Claims (8)

1 . A magazine comprising: a first tool holding unit and a second tool holding unit; a transporting device being configured to transport the first tool holding unit and the second tool holding unit that are configured thereon, the first tool holding unit and the second tool holding unit detachably holding a first tool and a second tool respectively, the transporting device including a support plate that is rotatable about a pivot center axis, the first and second tool holding units being disposed on the support plate, the first and second tools being inserted in the first and second tool holding units respectively in a direction which extends parallel to the pivot center axis, the first tool having a first identifier and the second tool having a second identifier; a reader device being configured to read at least the first identifier after the first tool holding unit has been transported to a predetermined transportation position; a first driving mechanism unit being configured to rotate the first tool holding unit about the direction which extends parallel to the pivot center axis so as to move the first identifier from a first position to a second position, the first tool holding unit being rotated by the first driving mechanism with respect to the support plate, and the second position being angularly displaced from the first position in a circumferential rotation direction of the first tool holding unit; and a second driving mechanism unit being configured to move the reader device from a third position to a fourth position, wherein the reader device is configured to read the first identifier when the reader device is at the third position facing the identifier at the second position, and wherein the fourth position is further away from the first tool holding unit than is the third position from the first tool holding unit.
2 . The magazine according to claim 1 , wherein the first driving mechanism unit has: an elastic member that applies, to the first tool holding unit, elastic force in a direction in which the first identifier is moved from the second position to the first position, and a cylinder that is provided to advance to and retreat from the first tool holding unit placed at the predetermined transportation position and that applies, to the first tool holding unit, external force in the direction in which the first identifier is moved from the first position to the second position.
3 . The magazine according to claim 1 , wherein the second driving mechanism unit has a cylinder that moves the reader device between the third position and the fourth position.
4 . The magazine according to claim 1 , wherein the first driving mechanism unit and the second driving mechanism unit share a cylinder that is provided to advance to and retreat from the first tool holding unit placed at the predetermined transportation position, that applies, to the first tool holding unit, external force in a direction in which the first identifier is moved from the first position to the second position, and that moves the reader device between the third position and the fourth position.
5 . The magazine according to claim 1 , wherein the first and second tool holding units are arranged on the support plate in a circumferential direction, the first identifier positioned at the first position is oriented in a direction tangential to the direction in which the first and second tool holding units are arranged, and the first identifier positioned at the second position is oriented toward an outer circumferential side of the support plate with respect to the direction tangential to the direction in which the first and second tool holding units are arranged.
6 . A machine tool comprising: the magazine according to claim 1 ; and an automatic tool changer that brings the first and second tools into and out of the magazine, wherein the predetermined transportation position corresponds to a tool change position at which the first and second tools are changed between the magazine and the automatic tool changer.
7 . The machine tool according to claim 6 , wherein when changing the first and second tools between the magazine and the automatic tool changer, the first identifier is positioned at the first position.
8 . The machine tool according to claim 6 , wherein when changing the first and second tools between the magazine and the automatic tool changer, the reader device is positioned at the fourth position.

Description

TECHNICAL FIELD The present invention relates to a magazine and a machine tool. BACKGROUND ART For example, Japanese Patent Laying-Open No. 2004-142043 (PTL 1) discloses a composite machining lathe including: a cutting tool rest; a first tool magazine and a second tool magazine; a tool changer that changes a tool held by the first tool magazine with a tool attached on the cutting tool rest; and a tool transporting device that transport tools between the first tool magazine and the second tool magazine. CITATION LIST Patent Literature PTL 1: Japanese Patent Laying-Open No. 2004-142043 SUMMARY OF INVENTION Technical Problem As disclosed in PTL 1 above, there has been known a machine tool including a magazine that stores a plurality of tools. In such a machine tool, each of the tools is provided with an identifier, such as an IC chip, that stores various types of tool information such as a type, length or diameter of the tool or a history of processing workpieces using the tool, and the tool information is read from the identifier by a reading device in the magazine for the sake of processing of workpieces, management of tools, or the like. Since the tools are arranged close to each other in the magazine, however, it may be difficult to read the identifier by the reading device depending on the position of the identifier provided on the tool. Further, when installing the reading device, it is necessary to avoid interference between the reading device and a tool holding unit that holds a tool in the magazine. Thus, it is an object of the present invention to solve the above-described problem and provide: a magazine in which an identifier accompanied with a tool can be read by a reading device and the reading device can be prevented from interfering with a tool holding unit; and a machine tool including such a magazine. Solution to Problem A magazine according to the present invention includes: a transporting device that has a plurality of tool holding units and that transports the plurality of tool holding units, each of the plurality of tool holding units detachably holding a tool inserted along a predetermined axis; a reading device that reads an identifier accompanied with a tool in a tool holding unit transported to a predetermined transportation position; a first driving mechanism unit that rotates each of the tool holding units about the predetermined axis so as to position, at a first position, an identifier in a tool holding unit placed at a transportation position different from the predetermined transportation position, and so as to position, at a second position, the identifier in the tool holding unit placed at the predetermined transportation position, the second position being displaced from the first position in a circumferential direction of the predetermined axis; and a second driving mechanism unit that moves the reading device so as to position the reading device at a third position when reading the identifier by the reading device and so as to position the reading device at a fourth position when transporting the plurality of tool holding units by the transporting device, the third position being a position facing the identifier positioned at the second position, the fourth position being a position away from the tool holding units with respect to the third position. According to the magazine thus configured, in the tool holding unit placed at the predetermined transportation position, the identifier is positioned at the second position displaced from the first position in the circumferential direction of the predetermined axis, and the reading device is positioned at the third position facing the identifier positioned at the second position, with the result that the identifier can be read by the reading device. Further, when transporting the plurality of tool holding units by the transporting device, the reading device is positioned at the fourth position away from the tool holding units with respect to the third position, with the result that the reading device can be prevented from interfering with the tool holding units. Preferably, the first driving mechanism unit has: an elastic member that applies, to each of the tool holding units, elastic force in a direction in which the identifier is moved from the second position to the first position; and a cylinder that is provided to be able to advance to and retreat from the tool holding unit placed at the predetermined transportation position and that applies, to the tool holding unit, external force in the direction in which the identifier is moved from the first position to the second position. According to the magazine thus configured, the tool holding unit can be rotated by the cylinder so as to move the identifier from the first position to the second position, and the tool holding unit can be rotated by the elastic member so as to move the identifier from the second position to the first position. Preferably, the second driving mechani