ICALEO 2009 Paper #1910 (FOCAL SHIFT MONITORING AND COGNITIVE CLOSED-LOOP CONTROL BY ANALYSIS OF CO-AXIAL VIDEO DATA)
FOCAL SHIFT MONITORING AND COGNITIVE CLOSED-LOOP CONTROL BY ANALYSIS OF CO-AXIAL VIDEO DATA
Authors:
Thibault Bautze, LDV, Technical Univ. of Munich; Munich Germany
Tobias Kaiser, FSR, Technical Univ. of Darmstadt; - Germany
Sonja Huber, IWB, Technical Univ. of Munich; Munich Germany
Presented at ICALEO 2009
Most laser welding heads offer the ability to connect a co-axial camera, using the same focusing lenses as the laser beam. Thus, the focal shift induced by heating the lenses and thus influencing the laser beam, alters the video data acquired. In the proposed approach, the sharpness of the video data is used to monitor the focal shift and distance changes relative ...$28.00
ICALEO 2009 Paper #1908 (Comparison of Powder Additive Qualities with Regard to Achievable LMD Results)
Comparison of Powder Additive Qualities with Regard to Achievable LMD Results
Authors:
Marco Goebel, Llt, Chair for Laser Technology Rwth Aachen; Aachen Germany
Steffanie Linnenbrink, Llt, Chair for Laser Technology Rwth Aachen; Aachen Germany
Ingomar Kelbassa, Llt, Chair for Laser Technology Rwth Aachen; Aachen Germany
N. Ludwig, -; -
Presented at ICALEO 2009
Laser Metal Deposition (LMD) is a common technology used for local repairs and additive manufacturing of complete parts 3D applications such as aero engine and automotive components as well as for wear and corrosion protection of parts 2D cladding applications such as tools, dies, a...$28.00
ICALEO 2009 Paper #1907 (Application of Holographic Beam Shaping in Selective Laser Melting for the Fabrication of Functional Polymer Components)
Application of Holographic Beam Shaping in Selective Laser Melting for the Fabrication of Functional Polymer Components
Authors:
Darrel Bunyan, Loughborough University; Loughborough Great Britain
Richard Heath, Loughborough University; Loughborough Great Britain
John Tyrer, Loughborough University; Loughbrough Great Britain
Matthew Gibson, Loughborough University; Loughborough Great Britain
Presented at ICALEO 2009
The applications of selectively laser sintered polymer components have been greatly limited by their poor mechanical properties as a result of high levels of residual porosity. This paper looks at the effects of using holographic beam shaping to...$28.00
ICALEO 2009 Paper #1904 (Effect of Path Planning on Residual Stress Distribution in Laser Powder Deposition Process)
Effect of Path Planning on Residual Stress Distribution in Laser Powder Deposition Process
Authors:
Ehsan Foroozmehr, Southern Methodist University; Dallas TX USA
Radovan Kovacevic, Rcam-Smu; Dallas TX USA
Presented at ICALEO 2009
One of the important parameters in laser powder deposition process is the deposition path pattern that affects final quality of the deposited material. In this study, a finite element method is used to model the thermal and structural behavior of the laser powder deposition process. An area is defined to be covered with AISI H13 powder with three different deposition patterns: one-section, two-section, and three-section. The two-section pattern divides th...$28.00
ICALEO 2009 Paper #1903 (Effect of Substrate on Temperature Field in Selective Laser Sintering of Metal Powders)
Effect of Substrate on Temperature Field in Selective Laser Sintering of Metal Powders
Authors:
Xianfeng Shen, Institute of Machinery Manufacturing Technology; Mianyang Peoples Republic of China
Yang Wang, -; -
Jialin Yang, -; -
Presented at ICALEO 2009
Selective laser sintering (SLS) of metal powders is an attractive Rapid Prototyping and Manufacturing (RPM) technology which can be used to produce three-dimensional metal parts directly from a CAD model. In the process, the substrates are commonly used for avoiding the balling effect in powder melting and dislocation of sintered part. A three-dimensional finite element thermal model in SLS of metal powder including t...$28.00
ICALEO 2009 Paper #1902 (Effects of Parameters on Surface Roughness of Samples by Selective Laser Melting)
Effects of Parameters on Surface Roughness of Samples by Selective Laser Melting
Authors:
Zemin Wang, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
Guangxia Chen, Jianghan University; Wuhan, Hubei Province Peoples Republic of China
Kai Guan, Huazhong University of Science and Technology; Wuhan, Hubei Province Peoples Republic of China
Changwen Peng, Huazhong University of Science and Technology; Wuhan, Hubei Province Peoples Republic of China
Xiaoyan Zeng, Huazhong University of Science and Technology; Wuhan, Hubei Province Peoples Republic of China
Presented at ICALEO 2009
During fabrications of metal parts by...$28.00
ICALEO 2009 Paper #1809 (Microlens Fabrication with Fiber Laser Induced Thermo-Mechanical Plastic Forming Method)
Microlens Fabrication with Fiber Laser Induced Thermo-Mechanical Plastic Forming Method
Authors:
Tao Chen, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
Tong Wang, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
Ji-Min Chen, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
Tie-Chuan Zuo, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
Shi-Bing Liu, Institute of Laser Engineering,Beijing University of Technology; Beijing Peoples Republic of China$28.00
ICALEO 2009 Paper #1808 (Analysis and Control of Penetration Depth Fluctuations in Single-mode Fiber Laser Welds)
Analysis and Control of Penetration Depth Fluctuations in Single-mode Fiber Laser Welds
Authors:
Yong Chae Lim, The Ohio State University; Columbus OH USA
Matt Reiter, Ohio State University; Columbus OH USA
Jungho Cho, Ohio State University; Columbus OH USA
Dave Farson, The Ohio State University; Columbus OH USA
M. Mehl, Honeywell FM&T; - USA
Presented at ICALEO 2009
Penetration depth fluctuations of single-mode fiber laser welds made with long focal length optics and the affects of sinusoidal laser power modulations were studied. It was found that the welds had a high aspect ratio and were subject to spiking defects. The magnitude of the pene...$28.00
ICALEO 2009 Paper #1807 (Qualification of HLAW of HSLA-80 Under Naval Vessel Rules)
Qualification of HLAW of HSLA-80 Under Naval Vessel Rules
Authors:
Paul Blomquist, Applied Thermal Sciences, Inc.; Sanford ME USA
Carl Chretien, -; -
Erik Oller, Concurrent Technologies Corp; - USA
Brian Marx, Concurrent Technologies Corp; - USA
Presented at ICALEO 2009
Procedures have been developed for Hybrid Laser Arc Welding (HLAW) of HSLA-80 and approved by the American Bureau of Shipping (ABS) for use in the construction of naval combatant vessels built under Naval Vessel Rules (NVR). This paper discusses problems encountered and solutions generated during the development sequence, especially in achieving satisfactory Charpy V-Notch (CVN) impact pr...$28.00
ICALEO 2009 Paper #1806 (Weldability of Austenitic and Dual Phase Stainless Steel on Fiber Laser Welding for Pipe Industry)
Weldability of Austenitic and Dual Phase Stainless Steel on Fiber Laser Welding for Pipe Industry
Authors:
Mok-Young Lee, RIST; Pohang South Korea
Presented at ICALEO 2009
Stainless steels were widely used for corrosive environments because they have high corrosion resistant properties. But the price of them was higher compared with carbon steel products, due to high cost of raw materials and low productivity. Laser welding has some advantages over conventional GTA welding process such as high welding speed, narrow bead width, excellent weld performance and saving of filler wire. From making stainless steel tube with laser welding, we reduce the price at the same time increase the quality. The ...$28.00
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