Remote processing of workpieces

• US 8,084,708 B2
• Filed: 02/24/2006
• Issued: 12/27/2011
• Est. Priority Date: 08/29/2003
• Status: Active Grant

• Current Assignee: Trumpf Laser- und Systemtechnik GmbH (TRUMPF SE + Co. KG)
• Original Assignee: Trumpf Laser- und Systemtechnik GmbH (TRUMPF SE + Co. KG)
• Inventors: Andreasch, Wolfgang, Horn, Armin, Kaupp, Peter
• Primary Examiner(s): Heinrich, Samuel M
• Application Number:
  US11/363,544
• Publication Number:
  US 20060180582A1
• Time in Patent Office: 2,132 Days
• Field of Search: 2191216-12172, 219/121.78, 21912181-12183, 700/186, 700/245, 700/264, 700174-177, 702182-185, 148/565
• US Class Current: 219/121.62
• CPC Class Codes: B23K 26/04 Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light

Abstract

Systems and related methods of programming a laser processing device for automated processing of a workpiece including indicating a processing location on a workpiece with a processing location indicator. The processing location is detected with a processing location detector. The scanner optics of the laser processing device are adjusted to a set position corresponding to the detected processing location. A set position of the scanner optics is detected with a processing location evaluator, and a control program corresponding to the detected set position of the scanner optics is generated with the processing location evaluator.

Claims

1. A programmable laser processing system for automated processing of workpieces, the laser processing system comprising:

a numerically controlled optics driver;

scanner optics comprising one or more scanner mirrors drivably connected to the optics driver and configured to direct a laser processing beam onto a workpiece;

a processing location indicator operable to generate a switching signal when the processing location indicator has reached a processing location on the workpiece;

an optical detection device configured to detect the processing location through the scanner optics;

an optics driver controller in electrical communication with the optics driver and configured to adjust the scanner optics, through the optics driver, to focus on the detected processing location; and

a processing location evaluator configured to generate a control program based on the detected processing location in response to receiving the switching signal from the processing location indicator, and to deliver the control program to the optics driver controller to position the scanner optics for subsequent processing of the workpiece by the laser processing beam,

wherein the processing location indicator is manually displaceable independently of the scanner optics to indicate the processing location,

wherein the scanner optics assume a dual function in which (i) during programming of the processing system, the scanner mirrors of the scanner optics operate to guide an image of the processing location from the workpiece to the optical detection device for use in detecting the processing location, and (ii) during workpiece processing, the scanner mirrors operate to guide the laser beam to the processing location.

2. The laser processing system according to claim 1, further comprising a manual switch disposed electrically between the processing location evaluator and the processing location indicator and configured to trigger delivery of the switching signal from the processing location indicator to the processing location evaluator when actuated.

3. The laser processing system according to claim 2, wherein the manual switch is disposed on the processing location indicator.

4. The laser processing system according to claim 1, wherein the processing location indicator comprises a light pointer configured to indicate the processing location with a light mark.

5. The laser processing system according to claim 1, wherein the processing location indicator is configured to indicate the processing location with a light mark visible on the surface of the workpiece.

6. The laser processing system according to claim 1, wherein the processing location indicator comprises a tactile indicator configured to indicate the processing location through physical contact with the workpiece.

7. The laser processing system according to claim 1, wherein an optical axis of the optical detection device coincides with a beam axis of the laser processing beam.

8. The laser processing system according to claim 1, wherein, during programming of the processing system, the optics driver controller automatically adjusts the scanner mirrors such that the processing location is maintained substantially centered in the image.

9. A laser processor programming system that operates in conjunction with scanner optics and a laser beam for automated processing of workpieces, the programming system comprising:

a processing location indicator operable to indicate a processing location on a workpiece;

an optical detection device configured to detect a processing location through scanner optics;

an optics driver controller configured to the adjust the scanner optics to a set position coinciding with the detected processing location; and

a processing location evaluator configured to detect the set position of the scanner optics, and, in response, generate a control program for subsequent processing of the workpiece,

wherein the processing location indicator is manually displaceable independently of the scanner optics to indicate the processing location, and

wherein the optics driver controller adjusts the scanner optics to assume a dual function in which (i) the optics driver controller adjusts scanner mirrors of the scanner optics to guide an image of the processing location from the workpiece to the optical detection device to detect the processing location, and (ii) during workpiece processing, the optics driver controller uses the control program to adjust the scanner mirrors to guide the laser beam to the processing location.

10. The laser processor programming system according to claim 9, wherein the processing location indicator comprises a manually engageable switch configured to actuate the processing location evaluator, thereby detecting the set position of the scanner optics and generating the control program.

11. The laser processor programming-system according to claim 9, wherein the optical detection device is selected from the group consisting of a position sensitive detector, a charge-coupled device camera, and a four quadrant diode.

12. The laser processor programming system according to claim 9, wherein the optics controller comprises memory configured to store the control program for subsequent processing of additional workpieces.