High Efficiency and High Quality Welding of Aluminum Alloy by Hybrid System Combined Nd:YAG Laser and Diode Laser

2009 ◽  
Vol 75 (10) ◽  
pp. 1222-1226 ◽  
Author(s):  
Tomokazu SAKAGAWA ◽  
Masaki KOICHI ◽  
Etsushi KATO ◽  
Shin-ichi NAKASHIBA ◽  
Shin HARAGUCHI ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Diode Laser ◽  
Hybrid System ◽  
Nd:Yag Laser ◽  
High Efficiency ◽  
High Quality

High-power high-efficiency acousto-optically Q-switched rod Nd:YAG laser with 885nm diode laser pumping

2013 ◽  
Vol 286 ◽  
pp. 291-294 ◽  
Author(s):  
K. Liu ◽  
F.Q. Li ◽  
H.Y. Xu ◽  
Z.C. Wang ◽  
N. Zong ◽  
...  
Keyword(s):  
Diode Laser ◽  
High Power ◽  
Nd:Yag Laser ◽  
High Efficiency ◽  
Laser Pumping

scholarly journals The Boundary of Key-hole Generation in Micro-welding of Aluminum Alloy by Pulsed Nd:YAG Laser with Superposition of Continuous Diode Laser

2014 ◽  
Vol 80 (4) ◽  
pp. 419-424 ◽  
Author(s):  
Shin-ichi NAKASHIBA ◽  
Yasuhiro OKAMOTO ◽  
Tomokazu SAKAGAWA ◽  
Masanori HARADA ◽  
Akira OKADA
Keyword(s):  
Aluminum Alloy ◽  
Diode Laser ◽  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Hole Generation

Study on Simulation of Stamping Forming and Die Surface Optimization of Aluminum Alloy Plate

2018 ◽  
Vol 764 ◽  
pp. 303-311
Author(s):  
Miao Hu ◽  
Zhi Qiang Yang ◽  
Xiao Lin Cao ◽  
Qing Yang ◽  
Yu Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Production Efficiency ◽  
High Efficiency ◽  
Low Cost ◽  
High Quality ◽  
Surface Design ◽  
Alloy Plate ◽  
Die Life ◽  
Die Surface ◽  
Blank Holding Force

Along with the automobile lightweight development, aluminum has become the focus of its own material characteristics. The aluminum alloy products with high efficiency, high quality and low cost are the guarantee of competitive advantage. High quality die surface is directly related to the product quality, cost, production efficiency, die life and so on. In this paper, the stamping process of two kinds of aluminum alloy products was simulated by Auto Form. The method of setting blank holding force and spring back compensation was introduced. At the same time, the setting of parameters such as die fillet, friction coefficient and draw bead was described in this paper. Finally, the optimization of die surface design was achieved by simulation.

3245 Effect of Continuous Diode Laser on Crack Generation in Pulsed Nd:YAG Laser Welding of Aluminum Alloy

2011 ◽  
Vol 2011.6 (0) ◽  
pp. _3245-1_-_3245-4_
Author(s):  
Kazuya MIURA ◽  
Yasuhiro OKAMOTO ◽  
Shin-ichi NAKASHIBA ◽  
Tomokazu SAKAGAWA ◽  
Akira OKADA ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Laser Welding ◽  
Diode Laser ◽  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Crack Generation ◽  
Pulsed Nd:Yag Laser Welding

The Formability and Elongation of Aluminum Alloys AA5083 and AA3003 for Micro-Truss Sandwiches Manufacturing

2020 ◽  
Vol 38 (9A) ◽  
pp. 1396-1405
Author(s):  
Arwa F. Tawfeeq ◽  
Matthew R. Barnett
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Cost Effective ◽  
Tensile Tests ◽  
Truss Structures ◽  
High Quality ◽  
Trade Off ◽  
Clad Layer ◽  
Higher Temperature ◽  
Different Shapes

The development in the manufacturing of micro-truss structures has demonstrated the effectiveness of brazing for assembling these sandwiches, which opens new opportunities for cost-effective and high-quality truss manufacturing. An evolving idea in micro-truss manufacturing is the possibility of forming these structures in different shapes with the aid of elevated temperature. This work investigates the formability and elongation of aluminum alloy sheets typically used for micro-truss manufacturing, namely AA5083 and AA3003. Tensile tests were performed at a temperature in the range of 25-500 ○C and strain rate in the range of 2x10-4 -10-2 s-1. The results showed that the clad layer in AA3003 exhibited an insignificant effect on the formability and elongation of AA3003. The formability of the two alloys was improved significantly with values of m as high as 0.4 and 0.13 for AA5083 and AA3003 at 500 °C. While the elongation of both AA5083 and AA3003 was improved at a higher temperature, the elongation of AA5083 was inversely related to strain rate. It was concluded that the higher the temperature is the better the formability and elongation of the two alloys but at the expense of work hardening. This suggests a trade-off situation between formability and strength. 

Hot cracking in autogenous welding of 6061-T6 aluminum alloy by rectangular pulsed Nd:YAG laser beam

2020 ◽  
Vol 64 (6) ◽  
pp. 1077-1088
Author(s):  
Hossain Ebrahimzadeh ◽  
Hassan Farhangi ◽  
Seyed Ali Asghar Akbari Mousavi
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Nd:Yag Laser ◽  
Hot Cracking ◽  
Pulsed Nd:Yag Laser

scholarly journals An Underwater Image Enhancement Algorithm Based on Generative Adversarial Network and Natural Image Quality Evaluation Index

2021 ◽  
Vol 9 (7) ◽  
pp. 691
Author(s):  
Kai Hu ◽  
Yanwen Zhang ◽  
Chenghang Weng ◽  
Pengsheng Wang ◽  
Zhiliang Deng ◽  
...  
Keyword(s):  
Image Quality ◽  
Image Enhancement ◽  
Quality Evaluation ◽  
High Efficiency ◽  
Natural Image ◽  
High Quality ◽  
Generative Adversarial Network ◽  
Image Quality Evaluation ◽  
Adversarial Network ◽  
Underwater Image

When underwater vehicles work, underwater images are often absorbed by light and scattered and diffused by floating objects, which leads to the degradation of underwater images. The generative adversarial network (GAN) is widely used in underwater image enhancement tasks because it can complete image-style conversions with high efficiency and high quality. Although the GAN converts low-quality underwater images into high-quality underwater images (truth images), the dataset of truth images also affects high-quality underwater images. However, an underwater truth image lacks underwater image enhancement, which leads to a poor effect of the generated image. Thus, this paper proposes to add the natural image quality evaluation (NIQE) index to the GAN to provide generated images with higher contrast and make them more in line with the perception of the human eye, and at the same time, grant generated images a better effect than the truth images set by the existing dataset. In this paper, several groups of experiments are compared, and through the subjective evaluation and objective evaluation indicators, it is verified that the enhanced image of this algorithm is better than the truth image set by the existing dataset.

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