Control device and control method for laser processing machine

Patent metadata

Field	Value
Publication number	US-9492884-B2
Application number	US-201113880136-A
Country	US
Kind code	B2
Filing date	Sep 13, 2011
Priority date	Oct 19, 2010
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

In a laser processing machine 100 including a plurality of element units containing at least a laser blower unit 3 , an optical-path purge unit 24 , and a temperature controlling unit 8 , a measurement unit and a control unit 10 are provided. The measurement unit measures an elapsed time from a final trigger at which a laser processing operation of the laser processing machine has stopped and no user operation is applied with respect to the laser processing machine. The control unit 10 stops the element units based on the elapsed time after the final trigger, when a condition specified for each of the element units is satisfied.

First claim

The invention claimed is:

1. A control device for a laser processing machine that includes element units containing at least a laser blower unit, an optical-path purge unit, and a temperature control unit, the control device comprising:
an input device configured to receive, in advance, an input of a first stop time, a second stop time, and a third stop time, based on a required activation time of each of the element units;
a first stop unit configured to pre-store the input first stop time;
a second stop unit configured to pre-store the input second stop time;
a third stop unit configured to pre-store the input third stop time;
a measurement unit configured to measure an elapsed time from a final trigger at which a laser processing operation of the laser processing machine has stopped and no user operation is applied with respect to the laser processing machine; and
a control unit configured to automatically stop the element units individually after the final trigger, in response to the elapsed time exceeding each of the pre-stored first stop time, the pre-stored second stop time, and the pre-stored third stop time, of each of the element units.

2. The control device according to claim 1 , wherein the first stop unit stops the laser blower unit when the elapsed time has exceeded the first stop time;
the second stop unit stops the optical-path purge unit when the elapsed time has exceeded the second stop time that is longer than the first stop time; and
the third stop unit stops the temperature control unit when the elapsed time has exceeded the third stop time that is longer than the second stop time.

3. A control device for a laser processing machine that includes element units containing at least a laser blower unit, an optical-path purge unit, and a temperature control unit, the control device comprising:
an input device configured to receive, in advance, an input of required activation times for the element units, based on a required activation time of each of the element units;
a stop unit configured to pre-store the input required activation times;
a measurement unit configured to measure an elapsed time from a final trigger at which a laser processing operation of the laser processing machine has stopped and no user operation is applied with respect to the laser processing machine;
a standby-permitted-time reception unit configured to receive an input of a standby permitted time in advance, which is a time during which a user can wait until the laser processing machine is activated; and
a control unit configured to, after the elapsed time has exceeded a predetermined time, automatically stop a corresponding one of the element units or maintain a stopped state thereof when the pre-stored required activation time of the corresponding element unit is shorter than the standby permitted time, and activate a corresponding one of the element units or maintain an activation state thereof when the pre-stored required activation time of the corresponding element unit is longer than the standby permitted time.

4. The control device according to claim 3 , wherein after the elapsed time has exceeded a predetermined time, the control unit stops the laser blower unit when a fixed value of a required laser-blower activation time is shorter than the standby permitted time; and maintains an activation state of the laser blower unit when the required laser-blower activation time is longer than the standby permitted time;
wherein after the elapsed time has exceeded a predetermined time, the control unit stops the optical-path purge unit or maintains a stopped state thereof when a required optical-path-purge activation time is shorter than the standby permitted time; and activates the optical-path purge unit or maintains an activation state thereof when the required optical-path-purge activation time is longer than the standby permitted time; and
wherein after the elapsed time has exceeded a predetermined time, the control unit stops the temperature control unit or maintains a stopped state thereof when a required temperature-control-unit activation time is shorter than the standby permitted time; and activates the temperature control unit or maintains an activation state thereof when the required temperature-control-unit activation time is longer than the standby permitted time.

5. The control device according to claim 4 , wherein an intermittent operation in which stop and activation of the optical-path purge unit are alternately repeated is performed so that the required optical-path-purge activation time is maintained equal to or less than the standby permitted time.

6. The control device according to claim 4 , wherein an intermittent operation in which stop and activation of the temperature control unit are alternately repeated is performed so that the required temperature-control-unit activation time is maintained equal to or less than the standby permitted time.

7. The control device according to claim 1 , wherein when an activation operation with respect to the laser processing machine is input by a user, the element units are activated sequentially starting with an element unit having a longer initial required activation time, so that an ending time of the initial required activation time required for an activation of each of the element units from a time of an input of the activation operation becomes identical.

8. The control device according to claim 1 , wherein at a time of vacuuming inside of a laser resonator, all of the laser blower unit, the optical-path purge unit, and the temperature control unit are stopped.

9. The control device according to claim 3 , wherein when an activation operation with respect to the laser processing machine is input by a user, the element units are activated sequentially starting with an element unit having a longer initial required activation time, so that an ending time of the initial required activation time required for an activation of each of the element units from a time of an input of the activation operation becomes identical.

10. The control device according to claim 3 , wherein at a time of vacuuming inside of a laser resonator, all of the laser blower unit, the optical-path purge unit, and the temperature control unit are stopped.

11. The control device according to claim 1 , wherein the second stop time that is longer than the first stop time,
the third stop time that is longer than the second stop time, and
each of the first stop time, the second stop time, and the third stop time is associated with a different respective element unit of the element units.

12. The control device according to claim 1 , wherein the measurement unit is configured to measure a time period from the final trigger when no user operation is detected, and
control unit is configured to stop the element units stepwise at unequal time intervals, after the time period lapses after the final trigger.

Assignees

• Kumaoka Mototoshi
• Kyoto Tomohiro
• Miyamoto Naoki
• Mitsubishi Electric Corp

Inventors

• Kumaoka Mototoshi
• Kyoto Tomohiro
• Miyamoto Naoki

Classifications

• H01S3/036

  Means for obtaining or maintaining the desired gas pressure within the tube, e.g. by gettering, replenishing; Means for circulating the gas, e.g. for equalising the pressure within the tube {(H01S3/031 takes precedence)} · CPC title

• H01S3/0407

  Liquid cooling, e.g. by water · CPC title

• H01S3/0401

  of optical elements being part of laser resonator, e.g. windows, mirrors, lenses · CPC title

• H01S3/2232

  Carbon dioxide (CO2) or monoxide [CO] · CPC title

• B23K26/00 Primary

  Working by laser beam, e.g. welding, cutting or boring · CPC title