In situ high speed diagnosis—A quantitative analysis of melt flow dynamics inside cutting kerfs during laser fusion cutting with 1 μm wavelength

2019 ◽  
Vol 31 (2) ◽  
pp. 022206 ◽  
Author(s):  
D. Arntz ◽  
D. Petring ◽  
F. Schneider ◽  
R. Poprawe
Keyword(s):  
Quantitative Analysis ◽  
High Speed ◽  
Flow Dynamics ◽  
Laser Fusion ◽  
Melt Flow ◽  
Laser Fusion Cutting

scholarly journals Quantitative study of melt flow dynamics inside laser cutting kerfs by in-situ high-speed video-diagnostics

Procedia CIRP ◽  
2018 ◽  
Vol 74 ◽  
pp. 640-644
Author(s):  
D. Arntz ◽  
D. Petring ◽  
S. Stoyanov ◽  
N. Quiring ◽  
R. Poprawe
Keyword(s):  
Quantitative Study ◽  
Laser Cutting ◽  
High Speed ◽  
Flow Dynamics ◽  
Melt Flow ◽  
High Speed Video

scholarly journals Transition from Stable Laser Fusion Cutting Conditions to Incomplete Cutting Analysed with High-speed X-ray Imaging

2020 ◽  
Vol 60 ◽  
pp. 470-480
Author(s):  
Jannik Lind ◽  
Florian Fetzer ◽  
Christian Hagenlocher ◽  
David Blazquez-Sanchez ◽  
Rudolf Weber ◽  
...  
Keyword(s):  
High Speed ◽  
Cutting Conditions ◽  
Laser Fusion ◽  
X Ray ◽  
X Ray Imaging ◽  
Laser Fusion Cutting ◽  
Stable Laser

scholarly journals In situ analysis of flow dynamics and deformation fields in cutting and sliding of metals

2015 ◽  
Vol 471 (2178) ◽  
pp. 20150194 ◽  
Author(s):  
Yang Guo ◽  
W. Dale Compton ◽  
Srinivasan Chandrasekar
Keyword(s):  
Material Removal ◽  
High Speed ◽  
Ductile Failure ◽  
Rake Angle ◽  
Flow Dynamics ◽  
High Speed Imaging ◽  
Image Velocimetry ◽  
Material Forming ◽  
Continuous Chip

The flow dynamics, deformation fields and chip-particle formation in cutting and sliding of metals are analysed, in situ , using high-speed imaging and particle image velocimetry. The model system is a brass workpiece loaded against a wedge indenter at low speeds. At large negative rake angles, the flow is steady with a prow of material forming ahead of the indenter. There is no material removal and a uniformly strained layer develops on the workpiece surface—the pure sliding regime. When the rake angle is less negative, the flow becomes unsteady, triggered by formation of a crack on the prow free surface and material removal ensuing—the cutting regime. The strain on the prow surface at crack initiation is found to be constant. Chip morphologies, such as discrete particle, segmented chip and continuous chip with mesoscale roughness, are shown to arise from a universal mechanism involving propagation of the prow crack, but to different distances towards the indenter tip. The simple shear deformation in continuous chip formation shows small-angle oscillations also linked to the prow crack. Implications for material removal processes and ductile failure are discussed.

An automatable algorithm for measurement of fluid flow during laser fusion cutting using in-situ trim cut analysis

2017 ◽  
Vol 48 (12) ◽  
pp. 1298-1303
Author(s):  
U. Jansen ◽  
D. Arntz ◽  
D. Petring ◽  
W. Schulz ◽  
R. Poprawe
Keyword(s):  
Fluid Flow ◽  
Laser Fusion ◽  
Trim Cut ◽  
Laser Fusion Cutting

scholarly journals Inline High Speed Laser Cutting of Band Material

2016 ◽  
Vol 854 ◽  
pp. 237-242
Author(s):  
Andreas Wetzig ◽  
Jan Hauptmann ◽  
Patrick Herwig ◽  
Eckhard Beyer ◽  
Wieland Bundschuh ◽  
...  
Keyword(s):  
Laser Cutting ◽  
High Speed ◽  
Laser Fusion ◽  
Alternative Technique ◽  
Cutting Machine ◽  
Dynamic Form ◽  
The World ◽  
High Dynamic ◽  
Laser Fusion Cutting ◽  
Band Material

Laser cutting is introduced as an alternative technique to manufacture typical metallic punching and bending parts. Assets and drawbacks of high speed laser cutting technologies like Remote Laser Cutting and laser fusion cutting by means of a high dynamic form cutter are discussed. Finally, the concept of the world´s first industrial inline reel to reel laser cutting machine for metal strips is presented.

scholarly journals Determination of the geometry of laser-cutting fronts with high spatial and temporal resolution

2021 ◽  
Vol 1135 (1) ◽  
pp. 012013
Author(s):  
Michael Sawannia ◽  
Peter Berger ◽  
Rudolf Weber ◽  
Thomas Graf
Keyword(s):  
Laser Power ◽  
High Speed ◽  
Frame Rate ◽  
Laser Fusion ◽  
Normal Vector ◽  
Local Surface ◽  
Aisi 304 ◽  
High Speed Video ◽  
Laser Fusion Cutting

Abstract The melt flow velocity and the local surface angles of the cutting front during laser fusion cutting of 10 mm AISI 304 were determined for a laser power of 8 kW and a feed rate of 2 m/min. The cut front was recorded with a polarization goniometer, which uses the polarization of the process emission to determine the local surface angles, allowing to calculate the orientation of the normal vector of the surface. The records in this work were carried out with a frame rate of 75 kHz and a spatial resolution of about 30 µm. This allowed to identify big and small structures moving down the cutting front and to determine their velocities. The approximate velocity of the small structures was 9.1 m/s and for the big structures approx. 2.5 m/s. The information of a usual high-speed video was compared with the additionally obtained geometry information.

Improving Melt Flow of Polyoxymethylene (“High-Speed POM”): Additive Design, Melt Rheology, and In Situ Composition Gradient Formation

2013 ◽  
Vol 299 (1) ◽  
pp. 51-64 ◽  
Author(s):  
Karlheinz Gamp ◽  
Yi Thomann ◽  
Christian Friedrich ◽  
André Hebel ◽  
Kirsten Markgraf ◽  
...  
Keyword(s):  
High Speed ◽  
Composition Gradient ◽  
Melt Flow ◽  
Melt Rheology ◽  
Gradient Formation ◽  
Additive Design

scholarly journals In-situ full-field mapping of melt flow dynamics in laser metal additive manufacturing

2020 ◽  
Vol 31 ◽  
pp. 100939 ◽  
Author(s):  
Qilin Guo ◽  
Cang Zhao ◽  
Minglei Qu ◽  
Lianghua Xiong ◽  
S. Mohammad H. Hojjatzadeh ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Flow Dynamics ◽  
Melt Flow ◽  
Full Field ◽  
Metal Additive Manufacturing ◽  
Field Mapping ◽  
Metal Additive
Sign in / Sign up

Export Citation Format

Share Document