US 11,986,903 B2
Laser processing machine and control method therefor
Satoshi Ito, Kanagawa (JP); and Atsuya Tanaka, Kanagawa (JP)
Assigned to AMADA CO., LTD., Kanagawa (JP)
Appl. No. 17/282,405
Filed by AMADA CO., LTD., Kanagawa (JP)
PCT Filed Sep. 26, 2019, PCT No. PCT/JP2019/037840
§ 371(c)(1), (2) Date Apr. 2, 2021,
PCT Pub. No. WO2020/071232, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 2018-189330 (JP), filed on Oct. 4, 2018; and application No. 2019-168184 (JP), filed on Sep. 17, 2019.
Prior Publication US 2021/0379696 A1, Dec. 9, 2021
Int. Cl. B23K 26/08 (2014.01); B23K 26/03 (2006.01); B23K 26/38 (2014.01)
CPC B23K 26/0838 (2013.01) [B23K 26/0344 (2015.10); B23K 26/0876 (2013.01); B23K 26/38 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A laser processing machine comprising:
a laser head configured to irradiate a workpiece with laser beam;
a belt conveyor provided away in an irradiation direction of the laser beam; and
a control unit configured to control operations of the laser head and the belt conveyor, wherein
the laser head is configured to be movable along at least a conveying direction of the belt conveyor and an inclined direction to the conveying direction of the belt conveyor,
the control unit is configured to determine whether or not a condition of a melting prevention run being satisfied, and in a case where it is determined that the condition of the melting prevention run is satisfied, to execute the melting prevention run to at least one of the laser head and the belt conveyor,
the melting prevention run is a run to avoid a relative moving speed of the laser head and the belt conveyor to turn to zero, and
the condition of the melting prevention run contains: a condition that a moving direction of the laser head and a conveying direction of the belt conveyor during the irradiation with the laser beam having a relationship the following (i) or (ii); and a condition that the moving speed of the laser head is within a preset range to the rotating speed of the belt conveyor during the irradiation with the laser beam
(i) in a case where the conveying direction of the belt conveyor agrees with the moving direction of the laser head
(ii) in a case where the moving direction of the laser head is the inclined direction to the conveying direction of the belt conveyor, and a moving speed of the laser head in orthogonal to the conveying direction of the belt conveyor is less than or equal to a preset speed.