Aluminum Tailored Blank Welding Using Laser Beam Shaping and Twin-Spot Optics

2000 ◽  
Author(s):  
Rey Hsu ◽  
Stefan Fliss ◽  
Stefan Heinemann
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Beam Shaping ◽  
Laser Source ◽  
Test Results ◽  
Co2 Lasers ◽  
Production Environment ◽  
Tailor Welded Blanks ◽  
Tailored Blanks ◽  
Tailored Blank

Abstract The use of aluminum tailor welded blanks in the automotive industry continues to grow due to the fact that aluminum is lightweight and the characteristics of the tailor welded blanks. It has been found that welding of aluminum blanks with a CO2 laser is difficult but doable in a production environment. By using a high power CW Nd:YAG (Neodynium dopped Yittrium Aluminum Garnet) laser. It is possible to obtain sound results with a much wider process parameter window. However, currently, high power CO2 lasers (in the range of 8 kW) are still the dominate laser source in North America steel tailor welded blank companies. Will these lasers be able to weld aluminum tailored blanks if the demand for aluminum tailor welded blanks increases? This study employed twin spot and beam shaping methods to weld 1mm and 2 mm tailored blanks together using a high power (9 kW maximum) CO2 laser for both 5754-O and 6111-T4 alloys. The results show that high power CO2 lasers can be used to weld 5754-O and 6111-T4 aluminum alloys with very precise parameter settings. However, using beam shaping is more critical than using twin spot for 1 mm thick aluminum blanks. Once the correct parameters are applied for using beam shaping, the cup test results are better than using twin spot.

scholarly journals Multilevel Computer Generated Hologram on a Curved Surface Made of Copper for High Power CO2 Laser Beam Shaping

2006 ◽  
Vol 72 (10) ◽  
pp. 1232-1236 ◽  
Author(s):  
Hideki HAGINO ◽  
Choong Sik Park ◽  
Tetsuhiro EBIHARA ◽  
Hiroaki AKAMATSU ◽  
Hisao KIKUTA ◽  
...  
Keyword(s):  
Laser Beam ◽  
Co2 Laser ◽  
High Power ◽  
Beam Shaping ◽  
Curved Surface ◽  
Laser Beam Shaping ◽  
Computer Generated Hologram

Beam Shaping Technology for High Power Diode Laser Source

2014 ◽  
Vol 915-916 ◽  
pp. 385-389
Author(s):  
Yuan Yuan Gu ◽  
Guo Xing Wu ◽  
Hui Lu ◽  
Jian Lin
Keyword(s):  
Conversion Efficiency ◽  
High Power ◽  
Beam Quality ◽  
Diode Lasers ◽  
Beam Shaping ◽  
Laser Source ◽  
Beam Parameter ◽  
Beam Combination ◽  
Continuous Output ◽  
Wall Plug Efficiency

Direct diode lasers have some of the most attractive features of any laser. They are very efficient, compact, wavelength versatile, low cost, and highly reliable. However, the full utilization of direct diode lasers has yet to be realized. This is mainly due their poor output beam quality. Because of this, direct diode lasers are typically used to pump other lasers such as bulk solid-state (rod and thin disk) and fiber lasers. An improvement of the wall-plug efficiency and Power density necessary can be achieved by beam shaping and beam combination such as polarization coupling. In this paper, using the beam shaping technology realize good beam quality and high wall-plug efficiency. Base on bars rated to 60 W and 57% conversion efficiency, vertically stacked arrays (twenty bars) of such configuration are demonstrated with rated to about 1200W. The beam quality of high-power high brightness 880 nm laser diode source is improved with beam shaping. Beam parameter product of 79. 3 mm mrad ×81. 2 mm mrad, electro-optical conversion efficiency of more than 45.8% and continuous output power of 1 kW are demonstrated. This laser can be directly applied to cladding, surface hardening and other fields.

High Power CO2 Laser Aluminum Tailored Blank Welding

1999 ◽  
Author(s):  
Rey Hsu ◽  
Stefan Fliss ◽  
Stefan Heinemann
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Tailored Blank ◽  
Tailored Blank Welding

Finite Element Simulation of the Drawability of Tailor-Welded Blank

2014 ◽  
Vol 660 ◽  
pp. 3-7 ◽  
Author(s):  
Agus Dwi Anggono ◽  
Tri Widodo Besar Riyadi
Keyword(s):  
Finite Element ◽  
Base Material ◽  
Tensile Load ◽  
Dimensional Accuracy ◽  
Production Costs ◽  
Experimental Result ◽  
Technical Problems ◽  
Tailor Welded Blanks ◽  
Tailored Blanks ◽  
Tailored Blank

Tailored welded blank (TWB) consists of steel sheets of different thicknesses and strength which welded into one sheet to reduce weight and production costs, to increase dimensional accuracy and strength. Since a tailored blank is composed of different sheets of metals having different thicknesses and properties, the forming of tailored blanks then creates a lot of technical problems especially in the scheme of deformation. The objective of this work was to evaluate the drawability of tailored blanks. In order to assess the forming behavior of the tailor-welded blanks under the influence of weld orientations, a finite element and experimental methods were conducted. Three welded specimens with weld lines oriented at an angle of 0°, 90° and 45° with respect to the direction of load were investigated. The finite element result showed in a good agreement with the experimental result. The result of the experiment showed that a welded part was characterized by a higher strength and lower plasticity compared to those of the base material. Hence, the weld influences the strain distribution of the tailor-welded specimens. This phenomenon depends strongly on the direction of the weld against the direction of tensile load. The lowest strains occur in the specimen with a longitudinal weld.

scholarly journals Fabrication of Multilevel Copper Computer Generated Hologram for High Power CO2 Laser Beam Shaping

2004 ◽  
Vol 70 (9) ◽  
pp. 1180-1185
Author(s):  
Hideki HAGINO ◽  
Choong Sik PARK ◽  
Masayuki YOKOI ◽  
Nobuhiro KATO ◽  
Mari MITSUMATA ◽  
...  
Keyword(s):  
Laser Beam ◽  
Co2 Laser ◽  
High Power ◽  
Beam Shaping ◽  
Laser Beam Shaping ◽  
Computer Generated Hologram

R & D of optics for high power CO2 lasers

1984 ◽  
Author(s):  
R. Sano ◽  
T. Miyata ◽  
K. Kawata ◽  
S. Sakuragi ◽  
H. Nanba ◽  
...  
Keyword(s):  
High Power ◽  
Co2 Lasers
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