scholarly journals An integrated FEM-ANN model for laser bending process with inverse estimation of absorptivity

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Ravi Kant ◽  
Shrikrishna N. Joshi ◽  
Uday S. Dixit
Keyword(s):  
Ann Model ◽  
Laser Bending ◽  
Bending Process ◽  
Inverse Estimation

Experimental Study on Line Single Surface Laser Bending Process of Sheet Metal

2011 ◽  
Vol 48 (8) ◽  
pp. 081408
Author(s):  
姜敏凤 Jiang Minfeng ◽  
陶茂科 Tao Maoke ◽  
刘会霞 Liu Huixia ◽  
李品 Lin Pin ◽  
张成 Zhang Cheng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Sheet Metal ◽  
Laser Bending ◽  
Bending Process ◽  
On Line ◽  
Surface Laser

Simulation and Control Models of Laser Bending Angle of Sheet Metals

2010 ◽  
Vol 431-432 ◽  
pp. 118-121
Author(s):  
Peng Zhang ◽  
Hong Wei Liu
Keyword(s):  
High Accuracy ◽  
Control Model ◽  
Sheet Metals ◽  
Laser Bending ◽  
Bending Angle ◽  
Dimension Group ◽  
Dimension Analysis ◽  
Bending Process ◽  
Simulation And Control ◽  
And Control

Laser bending process of sheet metals is a highly flexible forming technique. Simulate model of laser bending process was established by dimension analysis, and the control model of laser bending was achieved with the regression of swatch datum. It was shown that dimension analysis was an effective method in simulating the complex laser bending process, and the control model, which came from non-dimension group datum, was a high-accuracy model in predictive analysis of bending angle.

An Experimental Study on Bending Process of AISI 304 Steel Sheets by using Diode Laser Forming

2014 ◽  
Vol 1 (1) ◽  
pp. 14-30
Author(s):  
Alfonso Paoletti
Keyword(s):  
Laser Beam ◽  
Diode Laser ◽  
Process Parameters ◽  
Laser Forming ◽  
Laser Bending ◽  
Aisi 304 ◽  
Steel Sheets ◽  
Metal Sheets ◽  
Bending Process ◽  
Aisi 304 Steel

Laser bending is a promising technique utilised in order to deform metal sheets that offers the advantage of requiring no hard tooling and no external forces, thus reducing cost and increasing flexibility. Laser forming involves a complex interaction of many process parameters, ranging from those connected with the irradiation of the laser beam to those regarding the thermal and mechanical properties of the workpiece material. The present work is focused on the laser bending of AISI 304 steel sheets by using of a diode laser. The influence of process parameters, such as the power of laser beam and the scanning speed as well as the metal sheet thickness on the bending angle has been taken into account. The investigation has also analysed the effect of rolling direction of the metal sheets and the conditions of cooling on the bending process.

Numerical Simulation on the Laser Bending of Thin Wall Tubes

2011 ◽  
Vol 460-461 ◽  
pp. 798-801 ◽  
Author(s):  
Nan Hai Hao ◽  
Yu Ling Gai
Keyword(s):  
Process Parameters ◽  
Three Dimensional ◽  
Mechanical Analysis ◽  
Outer Diameter ◽  
Thin Wall ◽  
Laser Bending ◽  
Cross Sectional ◽  
Bending Process ◽  
Mechanical Bending ◽  
The Cost

Laser tube bending is a spring-back-free noncontact forming method that has received considerable attention in recent years. Compared to mechanical bending, no hard tooling, dies, or external force is used in laser bending, thus the cost is greatly reduced for small-batch production and prototyping. Some quality issues, such as cross sectional distortion and intrados protrusion exist in laser bending and have growing tendency when the tube’s wall being thinner. This paper investigates the effects of process parameters on the deformation of thin wall tube through numerical simulations and experiments. The dimensions of the tube analyzed are 32 mm in outer diameter and 0.48mm in wall thickness. A three-dimensional transient thermo-mechanical analysis using the finite element method is carried out to simulate the laser bending process with some results validated by experiments. The effects of process parameters on the deformation of thin wall tubes are discussed in detail.

Numerical Study on Influences of Process Parameters on Laser Tube Bending

2010 ◽  
Vol 148-149 ◽  
pp. 590-594
Author(s):  
Yan Jin Guan ◽  
Hong Mei Zhang ◽  
Sheng Sun ◽  
Guo Qun Zhao
Keyword(s):  
Numerical Study ◽  
Laser Spot ◽  
Forming Process ◽  
Laser Bending ◽  
Bending Angle ◽  
Scanning Velocity ◽  
Bending Process ◽  
Wrap Angle ◽  
Flexible Forming Process ◽  
External Forces

Laser bending process of tubes is a new flexible forming process without rigid tools and external forces. The tube is formed by internal thermal stress induced by laser irradiation. The process simulation of laser bending of tubes is realized numerically. When the other parameters remain invariable, the laser bending angle augments with the increase of the laser power. The laser bending angle decreases with the increase of the scanning velocity. Meanwhile, the bending angle varies with the diameter of the laser spot. The angle begins to decrease when the laser spot diameter get to an optimum value. The bending angle enlarges if the scanning wrap angle augments. The bending angle is largest when the scanning wrap angle is 180°. When the scanning wrap angle is over 180°, the bending angle decreases with the increase of the scanning wrap angle. The relationship between the number of scans and the bending angle is about in direct ratio. The bending angle induced by the first irradiated time is the largest.

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