In-process workpiece and fixture sensing for flexible, repeatable laser processing of 3D parts

Abstract

Growth in industrial application of multiaxis laser systems for cutting, drilling, and welding of three dimensional parts is occurring as laser systems expand their capability to address needs for: • Greater accuracy and repeatability of laser processed workpieces • Flexibility for economical small lot manufacturing • High process reliability In-process sensing of workpieces and workpiece fixturing is helping to address these needs. For example, accuracy of laser processed workpieces is increased through better control of where the laser process occurs relative to critical part features. This is true even for highly distorted sheet metal parts. Reduced setup time for effective low volume manufacturing is accomplished by sensing the fixture location and identifying the part it is used to hold. Key laser process control variables, including laser power at the workpiece and gas assist nozzle condition, are monitored to ensure reliable processes.The objective of this paper is to discuss advances in control of the laser process produced by in-process sensing and to review the implications for industrial applications.Growth in industrial application of multiaxis laser systems for cutting, drilling, and welding of three dimensional parts is occurring as laser systems expand their capability to address needs for: • Greater accuracy and repeatability of laser processed workpieces • Flexibility for economical small lot manufacturing • High process reliability In-process sensing of workpieces and workpiece fixturing is helping to address these needs. For example, accuracy of laser processed workpieces is increased through better control of where the laser process occurs relative to critical part features. This is true even for highly distorted sheet metal parts. Reduced setup time for effective low volume manufacturing is accomplished by sensing the fixture location and identifying the part it is used to hold. Key laser process control variables, including laser power at the workpiece and gas assist nozzle condition, are monitored to ensure reliable processes.The objective of this paper is to discuss advances in control o...