Experimental and parametric evaluation of cut quality characteristics in CO2 laser cutting of polystyrene

Optik ◽  
2019 ◽  
Vol 184 ◽  
pp. 103-114 ◽  
Author(s):  
Elyas Haddadi ◽  
Mahmoud Moradi ◽  
Ayub Karimzad Ghavidel ◽  
Ali Karimzad Ghavidel ◽  
Saleh Meiabadi
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Quality Characteristics ◽  
Cut Quality

Selected Malaysian Wood CO2-Laser Cutting Parameters And Cut Quality

2008 ◽  
Vol 5 (8) ◽  
pp. 990-996 ◽  
Author(s):  
Nukman Yusoff ◽  
Saiful Rizal Ismail ◽  
Azuddin Mamat ◽  
Aznijar Ahmad-Yazi
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Cutting Parameters ◽  
Cut Quality

scholarly journals Multi-objective Optimization of Kerf-taper and Surface-roughness Quality Characteristics for Cutting-operation On Coir and Carbon Fibre Reinforced Epoxy Hybrid Polymeric Composites During CO2-Pulsed Laser-cutting Using RSM

2021 ◽  
Author(s):  
Yadvinder Singh ◽  
Jujhar Singh ◽  
Shubham Sharma ◽  
Vivek Aggarwal ◽  
Catalin I. Pruncu
Keyword(s):  
Carbon Fibre ◽  
Laser Cutting ◽  
Pulse Width ◽  
Cutting Speed ◽  
Pulse Frequency ◽  
Quality Characteristics ◽  
Gas Pressure ◽  
Coir Fibre ◽  
Kerf Taper ◽  
Cut Quality

AbstractCurrent research focuses on optimizing various quality characteristics for kerf geometry generated through laser cutting of Coir fibre/carbon fibre/epoxy resin hybrid composite adjacent to straight cut profile employing pulsed CO2 laser system. The Kerf taper (KT) and the Surface roughness (SR) are the main quality parameters discussed. Dependent on significant process parameters, namely gas pressure, cutting speed, pulse frequency and pulse width predictive models were developed. In accordance with Taguchi's L9 orthogonal array (OA), the cutting trials are designed. Process-parametric optimization was performed using Response Surface Methodology (RSM). Furthermore, experiments were performed to obtain experimental data for the analysis of cut quality features. The impact of the input variables on the response characteristics is also explored. The morphological characterizations have been performed to analysis the effect of machining-variables and cut-quality for the top and bottom kerf widths with various laser cutting variables in the pulse laser-cutting of Coir-fibre/carbon-fibre/epoxy-resin hybrid composite. For SR and KT, the developed second order surface response model was found very successful. The optimal levels of cutting variables for KT are established at Gas pressure-6 N/mm2, pulse width-2.04 ms, cutting speed-8.01 mm/s, pulse frequency-15 Hz, for sample A1, Gas pressure-5.47 N/mm2, pulse width-2.5 ms, cutting speed-8.81 mm/s, pulse frequency-8.43 Hz, for sample A2, Gas pressure-3.85 N/mm2, pulse width-1.5 ms, cutting speed-9.06 mm/s, pulse frequency-5 Hz, for sample A3 additionally for SR Gas pressure-2 N/mm2, pulse width-1.5 ms, cutting speed-7 mm/s, pulse frequency-5 Hz, for sample A1, Gaspressure-2.36 N/mm2, pulse width-1.5 ms, cutting speed-7 mm/s, pulse frequency-15 Hz, for sample A2, Gaspressure-6 N/mm2, pulse width-1.5 ms, cutting speed-11 mm/s, pulse frequency-8.73 Hz, for sample A3. Regression results and linear and square impact of laser cutting variables have been revealed to be important to validate the model.

Improved Method of CO2 Laser Cutting of Aluminum Nitride

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Raathai Molian ◽  
Pranav Shrotriya ◽  
Pal Molian
Keyword(s):  
Aluminum Nitride ◽  
Laser Beam ◽  
Co2 Laser ◽  
Laser Cutting ◽  
Cutting Speed ◽  
Heat Sinks ◽  
Energy Losses ◽  
Unstable Crack ◽  
Thermochemical Method ◽  
Cut Quality

The traditional “evaporation∕melt and blow” mechanism of CO2 laser cutting of aluminum nitride (AlN) chip carriers and heat sinks suffers from energy losses due to its high thermal conductivity, formation of dross, decomposition to aluminum, and uncontrolled thermal cracking. In order to overcome these limitations, a thermochemical method that uses a defocused laser beam to melt a thin layer of AlN surface in oxygen environment was utilized. Subsequent solidification of the melt layer generated shrinkage and thermal gradient stresses that, in turn, created a crack along the middle path of laser beam and caused material separation through unstable crack propagation. The benefits associated with thermal stress fracture method over the traditional method are improved cut quality, higher cutting speed, and lower energy losses.

scholarly journals State-Of-The-Art and Trends in CO2 Laser Cutting of Polymeric Materials—A Review

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3839
Author(s):  
Ray Tahir Mushtaq ◽  
Yanen Wang ◽  
Mudassar Rehman ◽  
Aqib Mashood Khan ◽  
Mozammel Mia
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Cutting Speed ◽  
Polymeric Materials ◽  
Pulse Frequency ◽  
Future Research ◽  
Cut Quality ◽  
Dross Formation ◽  
Economical Aspect ◽  
Carbon Dioxide Co2

Carbon dioxide (CO2) laser cutting finds one of its most relevant applications in the processing of a wide variety of polymeric materials like thermoplastics and thermosetting plastics. Different types of polymeric materials like polypropylene (PP), polymethyl methacrylate (PMMA), low- and high-density polyethylene (LDPE, HDPE), are processed by laser for different household as well as commercial products in the industry. The reason is their easy availability and economical aspect in the market. The problems associated with laser cutting include heat-affected zone (HAZ) generated on the cut surface, kerf width (KW), surface roughness (SR), dross formation, and striations formation. Furthermore, other related problems include taper cutting for deep parts and high-power consumption. The primary purpose of this work is a comprehensive literature review in CO2 laser cutting of polymeric materials. The influence of parametric variation on the cut quality is also explained. Cut quality in terms of KW, SR, HAZ, dross formation, and striations formation is analyzed by optimizing cutting variables like laser power (PL), cutting speed (CS), assist gas pressure (Pg), pulse frequency, nozzle type and its diameter, and stand-off distance (SOD). The effects of the laser cutting on the properties of different thermoplastics/thermosetting materials are also reported. However, this topic requires further studies on exploring the range of polymeric materials, and their optimal parameters selection to improve the cut quality. Therefore, the research gaps and future research directions are also highlighted in the context of CO2 laser cutting for polymeric materials.

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