New Technology of Laser Cutting Silicon Steel Controlled by Rotating Gas Flow

2008 ◽  
Vol 44 (07) ◽  
pp. 215 ◽  
Author(s):  
Lei HONG
Keyword(s):  
Laser Cutting ◽  
Gas Flow ◽  
New Technology ◽  
Silicon Steel

Influence of Gas Flow under Workpiece in CO2 Laser Cutting Silicon Steel

2008 ◽  
Vol 28 (3) ◽  
pp. 522-527
Author(s):  
洪蕾 Hong Lei ◽  
米承龙 Mi Chenglong ◽  
李力钧 Li Lijun
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Gas Flow ◽  
Silicon Steel

Light-Gas Eccentrically High Speed Laser Cutting of Silicon Steel on Cold Rolling Production Line

2014 ◽  
Vol 881-883 ◽  
pp. 1469-1474 ◽  
Author(s):  
Li Jun Xin ◽  
Zhi Yong Wang
Keyword(s):  
Laser Cutting ◽  
High Speed ◽  
Cutting Speed ◽  
Silicon Steel ◽  
Gas Jet ◽  
Offset Distance ◽  
Cutting Surface ◽  
Allowable Range ◽  
Rolling Production ◽  
Better Than

In view of the cutting speed reduced and cutting quality became poor because cutting front changes to flat and amount of lag changes to large, light-gas eccentrically cutting method was proposed. Through the experiment and analysis of the results, the conclusion can be obtained that when laser beam is before gas jet, cutting speed can be improved. While offset distance have impacts to cutting result. If the offset distance is too small, it has no difference with light - gas coaxial cutting; if the offset distance is too large, it weakens the gas jet at the cutting surface, which is not conducive to cutting. It can achieve the best results when the offset distance is 0.3mm.The cutting quality with 1.5mm diameter nozzle is better than that of 2mm. Therefore within the allowable range in the offset distance the nozzle aperture should be reduced.

Influence of selected parameters on phenomena of two-phase flow and heat exchange in TSL furnace – numerical investigation

2017 ◽  
Vol 27 (12) ◽  
pp. 2799-2815
Author(s):  
Ewa Kolczyk ◽  
Zdzisław Miczkowski ◽  
Józef Czernecki
Keyword(s):  
Numerical Simulation ◽  
Heat Exchange ◽  
Liquid Slag ◽  
Gas Flow ◽  
Two Phase Flow ◽  
New Technology ◽  
Phase Flow ◽  
Two Phase ◽  
Content Type ◽  
Submerged Lance

Purpose The purpose of this study is application of a numerical simulation for determination of the influence of geometric parameters of a furnace and hydrodynamics of the gas introduced by a vertical submerged lance on the process of feed mixing and temperature distribution. Design/methodology/approach A numerical simulation with Phoenics software was applied for modeling of liquid phase movement and heat exchange between the gas supplied through a lance and the slag feed in a top submerged lance (TSL) furnace. The simulation of a two-phase flow of a slag–gas mixture based on the inter phase slip algorithm module was conducted. The influence of selected parameters, such as depth of lance submergence, gas flow rate and change of furnace geometry, on the phenomena of movement was studied. Findings Growth of dynamics of mixing with the depth of lance submergence and with increase of gas velocity in the lance was observed. Formation of a recirculation zone in the liquid slag was registered. Movement of the slag caused by the gas flow brought homogenization of the temperature field. Originality/value The study applied the simulation of a two-phase flow in the liquid slag–gas system in steady state, taking into account heat transfer between phases. It provides possibilities for optimization and selection of process parameters within the scope of the developed new technology using a TSL furnace.

scholarly journals Melt Flow and Energy Limitation of Laser Cutting

2016 ◽  
Vol 64 (5) ◽  
pp. 1555-1559
Author(s):  
Pavel Hudeček ◽  
Petr Dostál
Keyword(s):  
Laser Cutting ◽  
Laser Energy ◽  
New Technology ◽  
Cutting Speed ◽  
Physical Factors ◽  
Laser Material Processing ◽  
Dry Process ◽  
Cutting Rate ◽  
Energy Limitation ◽  
Plastic Parts

Laser technology is a convertible technology for plenty of parts in most materials. Laser material processing for industrial manufacturing applications is today a widespread procedure for welding, cutting, marking and micro machining of metal and plastic parts and components. Involvement and support this huge mass-production industry of laser cutting, new technology and dry-process using lasers were and are being actively developed. Fundamentally, industrial laser cutting or other applications on industry should satisfy the four key practical application issues including “Quality or Performance”, “Throughput or Speed”, “Cost or Total Ownership Cost”, and “Reliability”. Laser requires for examples several complicated physical factors to be resolved including die strength to be enable good wire-bonding and survival of severe cycling test, clean cutting wall surface, good cutting of direct attach film, and proper speed of cutting for achieving economy of throughput. Some example of maximum cutting rate, wherewith is normally limited laser energy, cutting speed is depend on type laser, different of cutting with one laser beam and beam pattern and applied laser power/material thickness will be introduced in this paper.

scholarly journals Pipeline Design and Construction Using Higher Strength Steels

1998 ◽  
Author(s):  
Alan G. Glover ◽  
David J. Horsley ◽  
David V. Dorling
Keyword(s):  
Gas Flow ◽  
New Technology ◽  
Large Diameter ◽  
Ultrasonic Inspection ◽  
Fracture Initiation ◽  
Fuel Gas ◽  
Flow Capacity ◽  
Cost Efficient ◽  
Pipeline Design ◽  
Design And Construction

Grade 550 (X80) pipeline steels are now the basis of a standard platform for the design and construction of large-diameter pipeline projects at NOVA Gas Transmission (NGT). Their introduction in 1995 and further application in 1997 have provided material savings, provided greater gas flow capacity and fuel gas savings and, once again, shown NGT to be an industry leader in successfully developing and applying new technology in response to business needs. The paper will outline the development of a Canadian capability to supply these steels, discuss design aspects including fracture initiation and arrest and weld/pipe strength mismatch, the overall cost efficient approach to material and weld requirements, and pipeline construction using mechanized welding with mechanized ultrasonic inspection and alternative weld acceptance standards. Future directions at NGT with respect to higher strength steels will also be described.

Off-Axial, Gas-Jet-Assisted, Laser Cutting of 6.35-mm Thick Stainless Steel

1995 ◽  
Vol 117 (2) ◽  
pp. 272-276 ◽  
Author(s):  
M. J. Hsu ◽  
P. A. Molian
Keyword(s):  
Stainless Steel ◽  
Laser Cutting ◽  
Gas Flow ◽  
Cutting Speed ◽  
Steel Plates ◽  
304 Stainless Steel ◽  
Gas Jet ◽  
Process Conditions ◽  
Cut Edge ◽  
Machining Rate

A dual gas-jet, laser-cutting technique involving coaxial and off-axial oxygen gas flows was developed to cut 6.35-mm thick AISI 304 stainless steel plates with a 1.2-kW CO2 gas transport laser at a cutting speed of 12.7 mm/sec (30 in./min). Under identical process conditions, the single, coaxial gas jet could not cut the stainless steel although the cutting speed was reduced to 2.11 mm/sec (5 in./min). Thresholds of off-axial nozzle diameter, gas-impinging angle, oxygen pressure, and other process parameters were determined to obtain clean-cut edge quality (average dross height 0.25 mm). Experimental data coupled with a fluid-dynamics model of gas flow were presented to show the effectiveness of the dual gas-jet, laser-cutting method in achieving the maximum machining rate without deteriorating the quality of cut.

Laser cutting of thick sectioned steels using gas flow impingement on the erosion front

1995 ◽  
Vol 7 (4) ◽  
pp. 199-209 ◽  
Author(s):  
P. M. Ilavarasan ◽  
P. A. Molian
Keyword(s):  
Laser Cutting ◽  
Gas Flow
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