Process planning for laser-assisted forming

External force-assisted LaserOrigami (LO) bending: Shaping of 3D cubes and edge design of stainless steel chairs

“…Roohi et al found similar interaction of the thermal and mechanical contribution, with the laser heating being able to decrease the mechanical opposition of the workpiece to the bending process and increase the formability. Good agreement is also found with data reported by Magee and De Vin [19], where the stringent bond between the achievement of high bend angles and the need for interactions between thermal and mechanical contributions is emphasized. To clarify further the role of thermal and mechanical contribution, Che Jamil et al [20] report bending angles of only 1 to 8 • by laser bending according to BM on 0.9 mm thick AISI 304 blanks using fibre laser with circular beam of 16 mm in diameter and power from 400 to 1000 W. Therefore, the achievement of the target value of 90 • here reported can be only interpreted in the light of combined thermal and mechanical effects during external force assisted laser bending.…”

Laser-Assisted Bending of Sharp Angles With Small Fillet Radius on Stainless Steel Sheets: Analysis of Experimental Set-Up and Processing Parameters

“…However, their target was the reach of bending angles of 90°, which is by far less than the nominal value of 140°herein investigated. Similarly, Magee and De Vin [16] reported a process planning for laserassisted forming of metal blanks at 90°bending angle. They found a strict relation between the shaping of metal blanks to high angles and the interaction between thermal and mechanical contributions.…”

Modification of bent angle of mechanically formed stainless steel sheets by laser forming

“…Mechanical forming suffers from the disadvantage that even after using in-process control spring back angle cannot be eliminated completely, which is of significant concern for near net shape forming (Magee and De Vin, 2002). Besides, some inaccuracies are often left to the work-piece after mechanical forming, for example, due to possibility of collision with the mechanical parts of equipment often the over-bending of work-piece cannot be cost effectively done to counter the spring back (Magee and De Vin, 2002).…”

“…Besides, some inaccuracies are often left to the work-piece after mechanical forming, for example, due to possibility of collision with the mechanical parts of equipment often the over-bending of work-piece cannot be cost effectively done to counter the spring back (Magee and De Vin, 2002). Magee and De Vin (2002) showed how laser forming technique can be effective in addressing such limitations left over by mechanical forming.…”

“…Besides, some inaccuracies are often left to the work-piece after mechanical forming, for example, due to possibility of collision with the mechanical parts of equipment often the over-bending of work-piece cannot be cost effectively done to counter the spring back (Magee and De Vin, 2002). Magee and De Vin (2002) showed how laser forming technique can be effective in addressing such limitations left over by mechanical forming. Dearden et al (2006) demonstrated flattening of bent sheets by laser forming using an iterative approach, where the error between the desired shape and the shape obtained after previous pass was used to give a new scan strategy for subsequent passes.…”