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Hua D.,Center for Photon Manufacturing Science and Technology | Hua D.,Jiangsu University | GuoHuan Z.,Center for Photon Manufacturing Science and Technology
Advanced Materials Research | Year: 2010

LSF is a novel forming technology brought recently. The deformation angle is the main concern of the LSF that was influenced with many factors. In order to optimize process parameters of bending with LSF, an orthotropic experimental method was introduced in this paper. The orthogonal experimental design is adopted to analyze the interaction of different processing parameters with the sample. It can give a relatively accurate description of the effect of laser processing parameters on the bending angle induced in the sample with a representative coverage of all parameters by efficient calculation. And it can make a comprehensive evaluation on coupling of process parameters. In the paper, laser bending of the AL sheet with the thickness of 0.25mm was studied by changing the laser energy, scan speed, and scanning times. The results show that the three parameters have different effects on bending angle, scanning times ranks first, followed by power and scan speed in terms of their effects on the bending angle. Scanning times have strong potential to increase bending angle of laser shock forming. The analysis results show that laser shock conditions should be carefully selected to ensure laser shock pressure for optimized deformation angle. © (2010) Trans Tech Publications. Source


Ding H.,Jiangsu University | Ding H.,Center for Photon Manufacturing Science and Technology | Zhang R.,Jiangsu University | Zhang R.,Center for Photon Manufacturing Science and Technology | And 3 more authors.
Advanced Materials Research | Year: 2013

As a new technology in the field of sheet metal plastic forming, Laser peening forming is a new invention which is based on the laser radiation induced shock waves. In the paper, the orthogonal experimental design is adopted to analyze the interaction of different processing parameters with the sample. Laser bending of thin 1060 pure aluminum sheet with the thickness of 0.25mm was studied by changing the laser energy, scanning velocity, and scanning times to understand the effect of process parameters. The results show that the three parameters have different effects on bending angles, scanning velocity ranks first, followed by scanning times and laser power in terms of their effects on the deformation angle. © (2013) Trans Tech Publications, Switzerland. Source


Zhou M.,Center for Photon Manufacturing Science and Technology | Li J.,Center for Photon Manufacturing Science and Technology | Yan F.,Center for Photon Manufacturing Science and Technology | Fan X.,Center for Photon Manufacturing Science and Technology | Cai L.,Center for Photon Manufacturing Science and Technology
Langmuir | Year: 2010

In this letter, we demonstrate a spherical nanocavities fabrication using an "air-molding" method, which is implemented by modulating the pressure difference across air-liquid interfaces in nanoholes on the mold. The cavities formation is theoretically considered and experimentally verified at macroscale first, and then a series of experiments are performed over a patterned surface with sub-300 nm holes by varying the pressure difference by sending a PDMS prepolymer coated mold into a vacuum chamber with changeable pressure. Results show that the air-molding method for spherical cavities fabrication is feasible not only at macroscale, but also at the nanoscale when introducing a pressure difference across the air-liquid interface. And the cavities shape is easily controlled by modulating the pressure in the vacuum chamber. The spherical cavities in this paper have application potential in the optical field and in micro-and nanofluidics. © 2010 American Chemical Society. Source

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