Laser machining apparatus and method of setting focus thereof
US5624587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Mar 8, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The focus of a laser machining apparatus is set by reading a program for setting the focus of the laser beam on a workpiece; irradiating the workpiece with the laser beam according to the program for setting the focus; moving a machining lens relative to the workpiece while keeping constant the distance between the machining head and the surface of the workpiece; detecting information regarding the relative distance between the machining lens and the workpiece; judging that the laser beam has focused on the workpiece when the detected relative distance information has exceeded a predetermined range and when a blue flame occurs; and storing the position information of the machining lens at the time when it is judged that the laser beam has focused on the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.