Two-rods dynamically stable resonator for 400-W laser cutting system

2001 ◽  
Author(s):  
Ognian E. Denchev ◽  
Nasko N. Gorunski
Keyword(s):  
Laser Cutting ◽  
Cutting System

Demonstration of a mobile laser cutting system for complex rescue operations

2019 ◽  
Vol 31 (2) ◽  
pp. 022209
Author(s):  
Alexander Brodesser ◽  
Christian Hennigs ◽  
Alexander Pfaff ◽  
Robert Grafe ◽  
Michael Hustedt ◽  
...  
Keyword(s):  
Laser Cutting ◽  
Cutting System

Laser Cutting Quality of the Ceramic Slabs

2006 ◽  
Vol 505-507 ◽  
pp. 847-852 ◽  
Author(s):  
Xu Yue Wang ◽  
Wen Ji Xu ◽  
Ren Ke Kang ◽  
Yi De Liang
Keyword(s):  
Laser Power ◽  
Laser Cutting ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Incident Laser Power ◽  
Focal Position ◽  
Geometrical Features ◽  
The Relationship ◽  
Cutting System

An experimental analysis is presented which investigates the relationship between cutting parameters and the volume of material removal as well as its cutting quality on a Nd:YAG laser cutting system. The parameters that varied on two testing thickness during cutting include cutting speed, incident laser power and focal position in a continuous through cut. Various trends of the kerf geometrical features in terms of the varying process parameters are analyzed and shown to be reasonable. Discussions are also given on kerf geometry control in situations with cutting parameters. It shows that the effects of varying parameters such as cutting speed, laser power and focal position on cutting kerf width, surface roughness, and striation that have provided a deeper understanding of the laser machining.

Technology Development on Reactor Dismantling and Investigation of Contamination in FUGEN

2017 ◽  
Author(s):  
Goro Soejima ◽  
Hiroki Iwai ◽  
Yasuyuki Nakamura ◽  
Hirokazu Hayashi ◽  
Haruhiko Kadowaki ◽  
...  
Keyword(s):  
Laser Cutting ◽  
Zirconium Alloy ◽  
Technology Development ◽  
Cutting Speed ◽  
Thermal Reactor ◽  
High Dose ◽  
Radiochemical Method ◽  
Cutting Method ◽  
Investigation Method ◽  
Cutting System

Advanced Thermal Reactor (ATR) FUGEN is the heavy water-moderated, boiling light water-cooled, pressure tube-type reactor. The commercial operation of FUGEN started on Mar. 1978 and terminated on Mar. 2003 and the decommissioning of FUGEN has been carried out since the decommissioning plan was approved in 2008. In order to perform the decommissioning work such as dismantling and decontamination safely and reasonably, technology development for the decommissioning has been promoted actively. This paper describes a part of technology development as follows. (1) Technology development on reactor dismantling The reactor of FUGEN is made of various materials such as stainless steel, carbon steel, zirconium alloy and aluminum which have relatively high activity concentration by operation for 25 years. With consideration of these characteristics, the reactor will be dismantled under water remotely in order to shield the radiation and prevent dust from migrating from water to air generated by the cutting considering the usage of zirconium alloy which is likely to be oxidized. In addition, laser cutting method whose features are fast cutting speed and less secondary waste in cutting will be applied for reactor dismantling. However, laser cutting method has no experiences to be applied to dismantlement of reactor facilities. Therefore, laser cutting for actual dismantled objects in air was demonstrated in controlled area in FUGEN using laser cutting system composed of articulated robot and laser cutting head. As a result, safety and applicability of laser cutting system was confirmed. From now on, primary cutting work in air, cutting demonstration with a relatively high dose rate and mock-up test in water for dismantling the actual reactor will be carried out. (2) Technology development on investigation of contamination It is necessary to evaluate radioactive inventory in the facilities accurately in order to reflect the evaluated data to dismantling plan appropriately. Therefore, the investigation of the contamination for the facilities has been carried out for safe and reasonable decommissioning work. The in-situ simple investigation method for the contamination of inner pipes which is mostly dominated by Co-60 is started to develop using the portable NaI(Tl) spectrometer. This method complements conventional investigation method to take samples from the pipes and to analyze them by radiochemical method to figure out the contamination of the whole facility.

Mobile laser cutting system for complex rescue operations

2018 ◽  
Author(s):  
Christian Hennigs ◽  
Alexander Brodesser ◽  
Stefan Kaierle ◽  
Michael Hustedt ◽  
Robert Grafe
Keyword(s):  
Laser Cutting ◽  
Cutting System

Improving Laser Cutting Quality for Two-Dimensional Contoured Paths

1998 ◽  
Vol 120 (3) ◽  
pp. 590-599 ◽  
Author(s):  
P. Di Pietro ◽  
Y. Lawrence Yao
Keyword(s):  
Laser Cutting ◽  
Small Diameter ◽  
Optimal Solution ◽  
Trial And Error ◽  
Optimization Strategy ◽  
Quality Improvements ◽  
Model Based ◽  
Cutting System ◽  
Successful Production

Quality improvements in laser cutting of mild steel have been achieved by a newly developed model-based optimization strategy and its application to one-dimensional cut has been reported early. The specific aims of this paper are to assure quality of cut when cornering and generating small diameter holes. Such routines encompass a large proportion of all features processed on laser cutting systems, and therefore their successful production is significant. Currently, extensive trial-and-error based experimentation is needed in order to improve quality for these routines. Thus model-based optimization has the benefit of reducing this time-exhaustive step whilst leading to an optimal solution. Nonlinear power adaptation profiles are generated via the optimization strategy in order to stabilize cutting front temperatures. Uniform temperatures produce better quality by reducing (i) kerf widening effects, (ii) heat-affected zone extents, and (iii) workpiece self-burning effects. Experimental results are presented, and it is demonstrated that such process manipulation can produce significant quality improvements. In addition, predicted heat-affected zones correlate closely to those actually obtained. The process manipulation is successfully implemented in an industrial laser cutting system under laboratory condition.

The Influence of the Laser Cutting System Performance on Cutting Quality

2013 ◽  
Vol 819 ◽  
pp. 105-109
Author(s):  
Ye Chang ◽  
Jin Jun Ji ◽  
Hong Mei Yin
Keyword(s):  
Experimental Data ◽  
Quality Control ◽  
System Performance ◽  
Laser Cutting ◽  
System Parameter ◽  
Cutting Parameters ◽  
Optimal System ◽  
System Parameters ◽  
Cutting System ◽  
Important Significance

Laser cutting is widely applied in the modern industry. With the development of production, there is a higher demand for the improvement of cutting quality. Hence, investigating the influence of laser cutting parameters on the sheet quality is of important significance in the quality control of the sheet processing. So, this research mainly investigated the influence of the cutting system performance on the cutting quality. First, the experiment was conducted to investigate these system parameters such as mode of light velocity, polarity, nozzle, and airflow etc. Then, by contrasting the experimental data, the optimal system parameter was obtained.

Laser micro-processing of cardiovascular stent with fiber laser cutting system

2009 ◽  
Vol 41 (3) ◽  
pp. 300-302 ◽  
Author(s):  
Hongyun Meng ◽  
Jianhong Liao ◽  
Yongheng Zhou ◽  
Qingmao Zhang
Keyword(s):  
Fiber Laser ◽  
Laser Cutting ◽  
Cardiovascular Stent ◽  
Cutting System
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