Investigation of the Profile of Laser Bends with Variable Scan Distance

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Resumé

Laser forming is a process capable of bending sheet metal only with the laser beam and without a physical interaction with the part. The part is formed by small and local deformations by the laser beam and it is done in increments with each pass of the laser. This incremental forming makes it difficult to ensure a smooth deformation field, which can result in non-smooth components and difficulties in achieving the required tolerance of the bends. This work presents an experimental investigation of the effect of varying the scan distance, number of passes per scan line and number of scan lines on profile of a v-bend. The v-bends were measured on both sides by a laser range scanner to determine the surface profile along the bend. To evaluate the quality of the vbend and define the profile as discrete or continuous, the bend roundness was evaluated manually and automatically by a Least Squares Circles method and by using second order differentiation method. The effect of varying the scan distance was tested experimentally on five samples with 16 mm and five samples with 20 mm bend length. The parts were subsequently evaluated on both the inside and outside of the bend and the bend angle was measured. The results show good correlation between the manual inspection and the automatic examination. The results show that the overlapping of the laser beam paths is required to create a continuous smooth bend.

OriginalsprogEngelsk
TidsskriftProcedia Manufacturing
Vol/bind36
ISSN2351-9789
DOI
StatusUdgivet - 2019
Begivenhed17th Nordic Laser Materials Processing Conference, NOLAMP17 - Trondheim, Norge
Varighed: 27 aug. 201929 aug. 2019

Konference

Konference17th Nordic Laser Materials Processing Conference, NOLAMP17
LandNorge
ByTrondheim
Periode27/08/201929/08/2019

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Laser beams
Lasers
Sheet metal
Inspection

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@inproceedings{24cf5f1eba8c4c56858c50032bcf32be,
title = "Investigation of the Profile of Laser Bends with Variable Scan Distance",
abstract = "Laser forming is a process capable of bending sheet metal only with the laser beam and without a physical interaction with the part. The part is formed by small and local deformations by the laser beam and it is done in increments with each pass of the laser. This incremental forming makes it difficult to ensure a smooth deformation field, which can result in non-smooth components and difficulties in achieving the required tolerance of the bends. This work presents an experimental investigation of the effect of varying the scan distance, number of passes per scan line and number of scan lines on profile of a v-bend. The v-bends were measured on both sides by a laser range scanner to determine the surface profile along the bend. To evaluate the quality of the vbend and define the profile as discrete or continuous, the bend roundness was evaluated manually and automatically by a Least Squares Circles method and by using second order differentiation method. The effect of varying the scan distance was tested experimentally on five samples with 16 mm and five samples with 20 mm bend length. The parts were subsequently evaluated on both the inside and outside of the bend and the bend angle was measured. The results show good correlation between the manual inspection and the automatic examination. The results show that the overlapping of the laser beam paths is required to create a continuous smooth bend.",
author = "Thomsen, {Anders Noel} and Ewa Kristiansen and Morten Kristiansen and Endelt, {Benny {\O}rtoft}",
year = "2019",
doi = "10.1016/j.promfg.2019.08.025",
language = "English",
volume = "36",
journal = "Procedia Manufacturing",
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}

Investigation of the Profile of Laser Bends with Variable Scan Distance. / Thomsen, Anders Noel; Kristiansen, Ewa; Kristiansen, Morten; Endelt, Benny Ørtoft.

I: Procedia Manufacturing, Bind 36, 2019.

Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftForskningpeer review

TY - GEN

T1 - Investigation of the Profile of Laser Bends with Variable Scan Distance

AU - Thomsen, Anders Noel

AU - Kristiansen, Ewa

AU - Kristiansen, Morten

AU - Endelt, Benny Ørtoft

PY - 2019

Y1 - 2019

N2 - Laser forming is a process capable of bending sheet metal only with the laser beam and without a physical interaction with the part. The part is formed by small and local deformations by the laser beam and it is done in increments with each pass of the laser. This incremental forming makes it difficult to ensure a smooth deformation field, which can result in non-smooth components and difficulties in achieving the required tolerance of the bends. This work presents an experimental investigation of the effect of varying the scan distance, number of passes per scan line and number of scan lines on profile of a v-bend. The v-bends were measured on both sides by a laser range scanner to determine the surface profile along the bend. To evaluate the quality of the vbend and define the profile as discrete or continuous, the bend roundness was evaluated manually and automatically by a Least Squares Circles method and by using second order differentiation method. The effect of varying the scan distance was tested experimentally on five samples with 16 mm and five samples with 20 mm bend length. The parts were subsequently evaluated on both the inside and outside of the bend and the bend angle was measured. The results show good correlation between the manual inspection and the automatic examination. The results show that the overlapping of the laser beam paths is required to create a continuous smooth bend.

AB - Laser forming is a process capable of bending sheet metal only with the laser beam and without a physical interaction with the part. The part is formed by small and local deformations by the laser beam and it is done in increments with each pass of the laser. This incremental forming makes it difficult to ensure a smooth deformation field, which can result in non-smooth components and difficulties in achieving the required tolerance of the bends. This work presents an experimental investigation of the effect of varying the scan distance, number of passes per scan line and number of scan lines on profile of a v-bend. The v-bends were measured on both sides by a laser range scanner to determine the surface profile along the bend. To evaluate the quality of the vbend and define the profile as discrete or continuous, the bend roundness was evaluated manually and automatically by a Least Squares Circles method and by using second order differentiation method. The effect of varying the scan distance was tested experimentally on five samples with 16 mm and five samples with 20 mm bend length. The parts were subsequently evaluated on both the inside and outside of the bend and the bend angle was measured. The results show good correlation between the manual inspection and the automatic examination. The results show that the overlapping of the laser beam paths is required to create a continuous smooth bend.

U2 - 10.1016/j.promfg.2019.08.025

DO - 10.1016/j.promfg.2019.08.025

M3 - Conference article in Journal

VL - 36

JO - Procedia Manufacturing

JF - Procedia Manufacturing

SN - 2351-9789

ER -