《发动机零件激光焊接修复》由会员分享，可在线阅读，更多相关《发动机零件激光焊接修复（13页珍藏版）》请在金锄头文库上搜索。
1、,Five Axis Laser Welding for Repair of Turbine Engine Components,Outline,Laser welding technology overview A History of success Applications and benefits Repair applications Potential benefits Barriers Potential projects Summary,Laser Welding A History of Success,Automotive Body-in-White, Gear box,
2、Sensors Medical Pacemakers, Implants, Surgical Instruments Electronics Hybrid packages, Sensors, Transducers Military Microwave devices, IR Sensors, Gyroscope Aerospace Fuselage Panels, Sensors Turbine Engine Components,Consistent quality,Negligible distortion,High speed,Minimal heat effect,70 m las
3、er welded joint,Application Repair of Turbine Engine Components,Weld repair of worn blade tips, knife edge seals, rotary seals Weld new sections of blades, NGVs Weld sheet metal sections of combustors,Growing Success in Aerospace,Reduced weight 1 lb on the engine = 5-10 lbs on the wing structure,Gro
4、wing Success in Aerospace,Source: Mendez, P. F., Eagar, T. W., “New Trends in Welding in the Aeronautic Industry”, 2nd Conference of New Manufacturing Trends, Bilbao, Spain, November 19-20, 2002.,Application - Aircraft Fuselage Panel Stringer Welding,Military jets: $2,000/lb/100,000 hours,Applicatio
5、ns and Benefits for AircraftFuselage Panel Stringer Welding,Reduced weight (fuel savings) Eliminate fasteners and sealing material Modify designs to account for lower heat affected zone. Reduced costs Welded joint made in half the time of a riveted joint. Improved reliability No rivets to corrode or
6、 fatigue No moisture traps,Potential Benefits of Laser Welding for Repair Depots,Flexible Applicable to a wide range of metals and alloys and to a wide range of components Sheet metal welding (+ cutting + drilling) Low distortion produces near net shape - means minimum post-weld machining and blendi
7、ng operations for repaired components,Readily automated addresses growing shortage of skilled labor/welders,Barriers to Laser Welding in Repair Applications,Process not qualified Highly concentrated beam creates demand for good joint fit-up prior to and during welding. Penetration limited by laser p
8、ower for autogenous welding processes. High capital equipment costs most often demands high utilization requires high volume applications or multiple applications,Source: Industrial Laser Processes An Introduction, AMT Laser Systems Product Group, 1999.,Potential Projects,Baffle plate welding Automa
9、ted seam tracking/in-situ weld quality monitoring Hybrid laser/arc welding,Baffle Plate Welding,Objective Extend laser welding of baffle plates to repair applications. Challenges Tooling designed to address design (joint fit-up; joint type that changes with location) Potential return Improved yield
10、less scrap, rework Improved process repeatability Reduced cost,Automated Seam Tracking -Weld Quality Monitoring,Objective Integrate adaptive tools to reliably track the weld joint and monitor weld quality Challenges High speed machine motion Varying surface conditions Laser weld plume and ejection o
11、f material Potential return Greatly reduced set-up times - greater equipment utilization Higher reliability - reduced inspection costs Reduced tooling costs,Hybrid Laser/Arc Welding,Objective Adapt hybrid laser + arc welding process to repair applications. Challenges Integration and control of the l
12、aser and arc welding equipment; develop weld process.,Source: Moore, P.L., et. al., “Development of Laser, and Laser/Arc Hybrid Welding for Land Pipeline Applications”.,Potential return Greater flexibility wider range of applications Higher weld speeds Improved tolerance to joint fit-up,Laser weldin
13、g is gaining traction as a means for aircraft and turbine engine manufacturers to reduce weight and production costs, and increase product quality. Consistent quality = reduced scrap, rework, inspection. Low distortion and high quality welds. Fast relative to conventional joining processes. Multi-ax
14、is laser welding systems with adaptive controls can provide maximum versatility and minimum set-up times. PRIMA North Americas experience in laser welding and integrated multi-axis laser systems can be valuable in adapting this technology to repair depots.,SummaryLaser Welding - An Enabling Technology,
