Št. zadetkov: 10
Izvirni znanstveni članek
Oznake:
time series;time-frequency analysis;pendant droplet;mass-spring systems;droplet detachment;
The subject of this study is the vertical mass-spring-like oscillation of a pendant droplet and its resonant detachment, which was experimentally observed in the process of laser droplet generation from a metal wire. The process was characterized by various time series, which were generated from a s ...
Leto:
2016
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci (vabljeno predavanje)
Oznake:
kovinske kapljice;anularni laserski snop;ločitev kapljice;nelinearna dinamika;stabilnost;metal droplets;annular laser beam;droplet detachment;nonlinear dynamics;stability;
Nonlinear phenomena and dynamics of annular laser beam metal droplet generation
Leto:
2015
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
aditivna proizvodnja;pot laserskega žarka;genetski algoritem;optimizacija;additive manufacturing;laser beam path;genetic algorithm;optimization;
In this study, a genetic algorithm-based laser beam (LB) path optimization method is presented to improve laser-based additive manufacturing (LBAM). To emulate the LBAM process, LB irradiation of a thin metal substrate is applied. The LB path generation is formulated as the search for the optimal se ...
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
directed energy deposition;annular laser beam;laser-beam intensity distribution;powder-catchment efficiency;process stability;clad properties;
This paper investigates the influence of laser-beam intensity distribution (LBID) on the performance of the annular laser-beam directed energy deposition (DED) process with axial powder delivery. Three different LBIDs: Gaussian-like (G-LBID), top-hat-like (TH-LBID) and ring (R-LBID) at two LBID diam ...
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
additive manufacturing;laser beam path;genetic algorithm;optimization;
This study presents a methodology of genetic-algorithm-based optimization of the laser-beam path for improving laser-based additive manufacturing (AM). A simple thermal model was developed to simulate the effects of laser-induced heat input on the temperature distribution within the substrate during ...
Leto:
2024
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci (vabljeno predavanje)
Oznake:
annular laser beam;direct metal deposition;process stability;
The paper provides a description of a direct annular laser beam based metal deposition head, which makes use of axial material feeding and variation of the laser beam intensity distribution (LBID) on the surface of the workpiece. The application and advantages of the developed head are presented by ...
Leto:
2018
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
kolobarjasti laserski žarki;navarjanje prahu;procesni parametri;izkoristek prahu;annular laser beams;powder cladding;process parameters;powder catchment efficiency;
In the paper a novel annular "ring shaped" laser beam cladding head and related cladding process are presented. In the cladding head a laser beam is shaped into an annular ring and guided coaxially with the powder tube disposing the powder jet in the centre of the focused annular laser beam ring. An ...
Leto:
2016
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
laser droplet generation;temperature measurement;high-speed camera;melting;droplet detachment;fluid dynamics;
This paper presents a high-speed thermal imaging method using a visible light camera, with application to the laser droplet generation process (LDG). In the experiment, a nickel wire-end was exposed to a collimated laser beam, and the subsequent process of wire melting, pendant droplet formation and ...
Leto:
2017
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
additive manufacturing;lasers;powder;
An annular laser beam based powder cladding head, which enables an axial powder feeding and variation of the laser beam intensity distribution (LBID) on the workpiece surface is presented. The influence of typical LBIDs, including Ring, Tophat(-), Tophat(+), and Gaussian-like, on a cladding process ...
Leto:
2018
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
direct laser deposition;axial nozzle shapes;wall-collision-dominated flow;powder-stream distribution;powder-catchment efficiency;
To improve the efficiency of the direct laser deposition (DLD) of metal powders, a concentrated powder-stream distribution is required, which can be affected by the shape of the powder-delivery nozzle. In this study, a simplified, powder particle–wall collision-based 3D numerical model of the powder ...
Leto:
2022
Vir:
Fakulteta za strojništvo (UL FS)