scholarly journals Characterisation of Laser System Power Draws in Materials Processing

2020 ◽  
Vol 4 (2) ◽  
pp. 48
Author(s):  
Nicholas Goffin ◽  
Lewis C. R. Jones ◽  
John Tyrer ◽  
Jinglei Ouyang ◽  
Paul Mativenga ◽  
...  
Keyword(s):  
Laser Processing ◽  
High Speed ◽  
Manufacturing Industry ◽  
Laser System ◽  
Processing System ◽  
Fibre Laser ◽  
Beam Power ◽  
Total System ◽  
Laser Systems ◽  
System Power

Due to their high speed and versatility, laser processing systems are now commonplace in many industrial production lines. However, as the need to reduce the environmental impact from the manufacturing industry becomes more urgent, there is the opportunity to evaluate laser processing systems to identify opportunities to improve energy efficiencies and thus reduce their carbon footprint. While other researchers have studied laser processing, the majority of previous work on laser systems has focused on the beam–material interaction, overlooking the whole system viewpoint and the significance of support equipment. In this work, a methodical approach is taken to design a set of energy modelling terminologies and develop a structured power metering system for laser systems. A 300 W fibre laser welding system is used to demonstrate the application of the power characterization system by utilizing a purpose-built power meter. The laser is broken down according to sub-system, with each part analysed separately to give a complete overall power analysis, including all auxiliary units. The results show that the greatest opportunities for efficiency improvements lie in the auxiliary units that support the laser devices as these were responsible for a majority of the electrical draw; 63.1% when the laser was operated at 240 W, and increasing as the beam power reduced. The remaining power draw was largely apportioned to electrical supply inefficiencies. In this work, the laser device delivered a maximum of 6% of the total system power. The implications of these results on laser processing system design are then discussed as is the suitability of the characterization process for use by industry on a range of specific laser processing systems.

High speed real-time wavefront processing system for a solid-state laser system

2007 ◽  
Author(s):  
Yuan Liu ◽  
Ping Yang ◽  
Shanqiu Chen ◽  
Lifang Ma ◽  
Bing Xu
Keyword(s):  
Solid State ◽  
Real Time ◽  
High Speed ◽  
Laser System ◽  
Processing System ◽  
Solid State Laser ◽  
State Laser

Laser Processing of 2-D and 3-D Structures for Tunable Embedded Capacitors

2011 ◽  
Vol 2011 (DPC) ◽  
pp. 001949-001976
Author(s):  
Rabindra N. Das ◽  
Timothy E. Antesberger ◽  
Francesco Marconi ◽  
Frank D. Egitto ◽  
Mark D. Poliks ◽  
...  
Keyword(s):  
Laser Processing ◽  
High Speed ◽  
Laser System ◽  
Sol Gel ◽  
Single Layer ◽  
Laser Micromachining ◽  
Embedded Capacitors ◽  
Embedded Capacitor ◽  
Material Formulation ◽  
Tunable Device

Material formulation, structuring, and modification are key to increasing the unit volume complexity and density of next generation electronic packaging products. Laser processing is finding an increasing number of applications in the fabrication of these advanced microelectronic devices. This is due, in part, to the ability to achieve highly localized treatment of materials with a spatial resolution of tens of microns. In addition, the process is data-driven, that is, patterns can be generated without the need for masking materials. In the present investigation, a variety of structures have been generated in polymer nanocomposites, nanoparticle films, and sol-gel thin films using a computer-controlled laser system. Specifically, micromachining technology has been used to produce both variable-thickness and discrete capacitors from a single sheet (layer) of capacitor material, such that both types of structures can be integrated into the same layer. In addition, the laser micromachining technology has been extended to design and develop new vertical multilayer embedded capacitors for high speed applications. High speed packages require thick dielectrics. Calculations show that multilayer vertical capacitors can be better than thick capacitors formed from a single layer. In general, multilayer embedded capacitors are fabricated by repeated lamination of resin-coated copper, or pre-preg with a capacitor core. This is a time consuming, lengthy process. As an alternative, we have deposited a single, thick capacitance layer, and subsequent laser micromachining has been used to form multiple parallel channels of a controlled depth. Metal deposition in the channels results in a multilayer embedded capacitor structure. Lasers micromaching can also provide various complex patterns such as 3-D spiral channels within a dielectric or magnetically active nanocomposite, subsequently filled with conducting materials to form inductors. This technique can be used to prepare inductors and capacitors in the same layer of nanocomposite material. Hence, the technique can be used to generate multi-functional structures for tunable device applications.

Laser Induced Metal Deposition on Semiconductor, Metallic and Polymeric Substrates From Electroplating Solutions

1987 ◽  
Vol 101 ◽  
Author(s):  
J. Zahavi ◽  
S. Tamir ◽  
M. Rotel ◽  
G.J. Campisi ◽  
P.E. Pehrsson ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Gallium Arsenide ◽  
High Speed ◽  
Laser Energy ◽  
Laser System ◽  
Pulsed Laser ◽  
Gold Deposits ◽  
Surface Barrier ◽  
Gold Cyanide ◽  
Laser Systems

ABSTRACTThis work is aimed at studying the feasibility of laser induced, high-speed, highly selective direct deposition of metals on substrates immersed in commercial electroplating solutions without masking procedures and external electric current.A Q-Switch Nd/YAG pulsed laser system and excimer UV pulsed laser systems operating respectively at wavelength of 532nm and at 193 and 248nm, were used in conjunction with commercial basic potassium gold cyanide and acidic gold tetrachloride solutions. The substrates were semiconductors (silicon, gallium arsenide and silicon carbide), metallic (platinum) and polymeric (polyimide).The morphology, structure, composition and properties of the gold deposits were examined by the SEM, TEM, X-ray, AES and ESCA techniques.Deposits were found to consist of elemental gold with thickness range from a few hundred angstroms to several micrometers, depending primarily on laser energy density and on the number of pulses. Deposition occurred wherever band gap energies (plus surface barrier) were smaller than the laser photon energy; none was observed in reverse situations, as in the cases of Si3N4 and fused SiO2.The deposits exhibited Schottky barrier contacts on silicon, silicon carbide and gallium arsenide.

scholarly journals Mechanical Properties of Fibre Laser Welded AZ31B Sheets and their Dependence on the Spot-Size

2015 ◽  
Vol 828-829 ◽  
pp. 298-304
Author(s):  
Stefan Riekehr ◽  
Riccardo Ravasi ◽  
Josephin Enz ◽  
Volker Ventzke ◽  
Nikolai Kashaev
Keyword(s):  
Laser Beam ◽  
Laser System ◽  
Base Material ◽  
Spot Size ◽  
Fibre Laser ◽  
Beam Power ◽  
Spot Diameter ◽  
Laser Beam Power ◽  
Focus Spot ◽  
Weld Area

In the present work the mechanical behaviour of laser beam welded AZ31B alloy was studied, by changing systematically the spot size of the used fibre laser system between 200 µm and 1000 µm at different power levels between 2 kW and 8 kW. Maximum welding velocities with respect to imperfections were determined. The characterization of the obtained welds - in terms of Vickers hardness, UTS, Af and weld width, resp. weld area - was correlated with the micro-texture in dependence of the different Focus Spot Diameters and Laser Beam Power levels as well as the resulting cooling rates. Highest UTS of 94% of the base material was achieved with 200 µm Focus Spot Diameter and Laser Beam Power of 4 kW at welding velocity of 100 mm/s. By increasing the Focus Spot Diameter to 600 µm, the tensile strength was reduced to 86 % of the actual strength of the base material.

New Laser Machine Tools for Processing Carbon Fibre Reinforced Plastic (CFRP)

2011 ◽  
Vol 496 ◽  
pp. 30-35
Author(s):  
Paul W French ◽  
Alexander Wolynski ◽  
Mo Naeem ◽  
Martin C Sharp
Keyword(s):  
Material Processing ◽  
Carbon Fibre ◽  
Laser System ◽  
Fibre Laser ◽  
Laser Material Processing ◽  
Laser Material ◽  
Reinforced Plastic ◽  
Laser Systems ◽  
Carbon Fibre Reinforced Plastic ◽  
The Uk

The interest in laser material processing of Carbon Fibre Reinforced Plastic (CFRP) over the past few years has increased, especially in the aerospace industry. A number of different laser groups around the world are investigating different laser sources for the express reason of developing a laser material processing centre for machining CFRP for the aerospace and automotive industry. This paper reports on the work of two such groups, in the UK and Germany, who are using fibre laser technology and a diode pumped solid state laser system. The initial results from the two studies are reported and show that these two very different laser systems offer processing capability with respect to machining CFRP.

scholarly journals Advances in Laser Drilling of Turbine Engine Components

1995 ◽  
Author(s):  
Terry L. VanderWert
Keyword(s):  
Process Control ◽  
Laser Processing ◽  
High Speed ◽  
Laser Drilling ◽  
Drilling Process ◽  
Automatic Production ◽  
Turbine Engine ◽  
Laser Systems ◽  
Engine Components ◽  
Improved Methods

The application of laser systems for drilling turbine engine components has continued to grow. New designs for components are being made as understanding of the process has increased and as capability of laser systems has grown. Advances in process control have led to higher throughput and quality in automatic production. Greater understanding of the laser drilling process has led to improved methods for controlling the spatter and remelt that are characteristic of laser processing. Availability of high speed. PC based controls has facilitated high speed sensing of the component location for precise and repeatable positioning of laser drilled features. This paper describes recent advances in laser drilling turbine engine components. Current capabilities of laser drilling are summarized.

scholarly journals REDUCING RISK FACTORS IN THE WORKPLACE OF THE LASER SYSTEM OPERATOR

2019 ◽  
Vol 3 ◽  
pp. 184
Author(s):  
Pāvels Narica ◽  
Inese Martinsone
Keyword(s):  
Risk Factors ◽  
Laser Beam ◽  
Thermal Effects ◽  
Laser Processing ◽  
Laser System ◽  
Production Processes ◽  
System Operator ◽  
Laser Systems ◽  
Harmful Substances

Laser processing of materials takes an increasing place in production processes. Improving the performance, improving the quality of processing is not a complete list of the positive aspects of the introduction of laser processing, but there are a number of points that need to be paid attention to during the operation of laser systems - these are issues related to safety. The following risk factors are specific to laser systems: firstly, the laser beam itself, effects on the organs of vision, direct thermal effects on the skin and tissues, secondly, harmful products resulting from the interaction of the laser beam and the material being processed. Aerosols, smoke and dust have different effects on the human body, especially on the respiratory system and the publication considers the risks associated with the release of harmful products during laser processing and the existing methods for reducing the concentration of harmful substances in the working area with specific examples.

Accelerating laser processes with a smart two-dimensional polygon mirror scanner for ultra-fast beam deflection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Florian Roessler ◽  
André Streek
Keyword(s):  
Energy Distribution ◽  
Real Time ◽  
Laser Processing ◽  
High Speed ◽  
Beam Deflection ◽  
Two Dimensional ◽  
Heat Accumulation ◽  
Field Programmable ◽  
Drill Holes ◽  
Average Laser

Abstract In laser processing, the possible throughput is directly scaling with the available average laser power. To avoid unwanted thermal damage due to high pulse energy or heat accumulation during MHz-repetition rates, energy distribution over the workpiece is required. Polygon mirror scanners enable high deflection speeds and thus, a proper energy distribution within a short processing time. The requirements of laser micro processing with up to 10 kW average laser powers and high scan speeds up to 1000 m/s result in a 30 mm aperture two-dimensional polygon mirror scanner with a patented low-distortion mirror configuration. In combination with a field programmable gate array-based real-time logic, position-true high-accuracy laser switching is enabled for 2D, 2.5D, or 3D laser processing capable to drill holes in multi-pass ablation or engraving. A special developed real-time shifter module within the high-speed logic allows, in combination with external axis, the material processing on the fly and hence, processing of workpieces much larger than the scan field.

scholarly journals Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2621
Author(s):  
Aneta Bartkowska
Keyword(s):  
Corrosion Resistance ◽  
Tool Steel ◽  
Laser Processing ◽  
Chemical Elements ◽  
Steel Substrate ◽  
Processing Parameters ◽  
Beam Power ◽  
Laser Beam Power ◽  
High Microhardness ◽  
The Impact

The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Chromium and boron as well as their mixtures were prepared in various proportions and then were applied on steel substrate in the form of precoat of 100 µm thickness. Depending on the type of precoat used and laser processing parameters, changes in microstructure and properties were observed. Coatings produced using precoat containing chromium and boron mixture were characterized by high microhardness (900 HV0.05–1300 HV0.005) while maintaining good corrosion resistance. It was also found that too low laser beam power contributed to the formation of cracks and porosity.

Fibre laser system providing generation of frequency-modulated pulses with a spectral width exceeding the gain linewidth

2016 ◽  
Vol 46 (12) ◽  
pp. 1092-1096 ◽  
Author(s):  
I O Zolotovskii ◽  
D A Korobko ◽  
D A Stoliarov
Keyword(s):  
Laser System ◽  
Spectral Width ◽  
Fibre Laser
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