Experimental investigation of transient temperature characteristic in high power fiber laser cutting of a thick steel plate

Long, Nguyen Phi; Matsunaga, Yukihiro; Hanari, Toshihide; Yamada, Tomonori; Muramatsu, Toshiharu

doi:10.1016/j.optlastec.2016.05.005

Cited by 25 publications

(6 citation statements)

References 16 publications

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“…An important result is the strong correlation between the temperature distribution of the process zone and the cut edge quality [26]. Consequently, further measurement setups have been developed to directly address the temperature of the melt film [34][35][36][37][38][39]. The direct temperature measurement differs from the indirect one by a calibration.…”

Section: Measurement Methods To Determine the Limiting Mechanisms Of ...mentioning

confidence: 99%

“…A sufficient spatial resolution ensures a differentiation of various temperature regions in the process zone. All of the examined direct temperature measurement setups achieve spatial resolution of the complete processing zone just by repositioning of the sensor [34][35][36][37][38][39]. Camera-based measurement setups performed particularly well, as they provide a sufficient temporal resolution in addition [26,38].…”

Section: Measurement Methods To Determine the Limiting Mechanisms Of ...mentioning

confidence: 99%

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Understanding the Changed Mechanisms of Laser Beam Fusion Cutting by Applying Beam Oscillation, Based on Thermographic Analysis

Pinder

Goppold

2021

Applied Sciences

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The latest research on applying beam oscillation in laser beam fusion cutting revealed significant process improvements regarding speed and quality. The reason for this increasing process efficiency remains unexplained; however, theoretical investigations suggest the change in energy deposition (respectively heat conduction) as the cause. The present paper aims to analyze the energy deposition by a novel temperature measurement method. For this purpose, a conventional laser beam cutting setup was equipped with beam oscillation technology and a high-speed temperature measurement setup. Various characteristics of the temperature distribution in the process zone (spatial and temporal resolved temperature profiles, maximum and average values, as well as melt pool size) were evaluated for different conditions of beam oscillation (amplitude, frequency, cutting speed). Additionally, the geometrical properties of the process zone, defining the absorptivity have been measured. The comparison with static beam shaping reveals strong temperature volatility, which is induced by the way of energy deposition and an improved absorptivity over a substantial part of the cut front, with the overall result of enhanced heat conduction. For the first time, changed mechanisms applying beam oscillation instead of static beam shaping have been experimentally identified. Based on these measurements, a previously developed explanatory model was not only confirmed but also extended.

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Section: Measurement Methods To Determine the Limiting Mechanisms Of ...mentioning

confidence: 99%

Section: Measurement Methods To Determine the Limiting Mechanisms Of ...mentioning

confidence: 99%

Understanding the Changed Mechanisms of Laser Beam Fusion Cutting by Applying Beam Oscillation, Based on Thermographic Analysis

Pinder

Goppold

2021

Applied Sciences

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“…Suhu yang tinggi mengakibatkan terjadi pemuaian dan peleburan pada material. Pada material plastik maka terjadinya peleburan mengakibatkan material hasil pemotongan meleleh, pada material baja atau steel pengaruh kecepatan potong menghasilkan suhu yang tinggi mengakibatkan bagian hasil pemotongan tampak hangus dan terjadi pemuaian (Long et al, 2016). Sementara pada analisis eksperimen dan numerical yang telah dilakukan (Harahap et al, 2022) dengan memvariasikan elektroda yang digunakan dengan catatan bahwa abesaran arus yang digunakan sama yaitu 100 A menyimpulkan bahwa jenis elektroda E 7016 menghasilkan kekutan Tarik tertinggi dan besaran arus juga sangat berpengaruh pada saat penyambungan logam las dimana daerah yang putus berada di diluar daerah lasan.…”

Section: Gambar 1 Cacat Timbul Pada Saat Kenaikan Kecepatan Potongunclassified

Analisa Cacat Timbul pada Material Aluminium Akibat Pemotongan Menggunakan Laser Cutting

Karyadi,

Nanda,

Suhara

2023

VCT

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Laser cutting has been widely used and is growing rapidly in the manufacturing industry, both in the automotive sector and other production fields as needed for fast, precise and accurate cutting processes. Cutting using laser cutting makes it very easy for the production industry to cut steel, aluminum and other materials. However, errors that often occur at this time when input parameters are carried out in the operation of CNC laser cutting often result in defects in the cut material. The purpose of this study was to determine the variation of speed parameters for cutting aluminum alloy type 1050A material with a thickness of 0.8 mm. With these speed variations, it can be seen at what speed the material corresponds to during the laser cutting process. The method in this study was to use an experimental method with variable speeds of 33 mm/s, 55 mm/s and 88 mm/s, then look at the defects that arise and make measurements arising from the flatness of the plate using a digital dial indicator. The results of this study showed that the highest defects were on the average of sections A3 and B3 of 0.012 mm with a plate diameter of 50.2 and 45.2 mm with an aluminum plate thickness of 0.8 mm. At a speed of 33 mm/s, it can be concluded that the appearance of these defects is very small, ranging from 0.004 mm-0.008 mm.Keywords:Laser Cutting; Arise Defects; Aluminum Alloy.__________________________ AbstrakPemotongan laser cutting telah banyak digunakan dan berkembang pesat di dunia industri manufaktur, baik di bidang otomotif maupun bidang produksi lainya sebagaimana dibutuhkan untuk proses pemotongan secara cepat, tepat dan akurat. Pemotongan menggunakan laser cutting sangat memudahkan bagi para industri produksi dalam memotong sebuah material baja aluminium dan material-material lainnya. Namun kesalahan yang sering terjadi pada saat ini apabila input parameter yang dilakukan dalam pengoperasian CNC laser cutting sering terjadi kecacatan pada material hasil potongan tersebut. Tujuan dari penelitian ini adalah dengan menentukan variasi parameter kecepatan terhadap pemotongan material aluminium alloy tipe 1050A ketebalan 0,8 mm. Dengan variasi kecepatan tersebut dapat dilihat pada kecepatan berapa yang sesuai dengan material tersebut pada saat proses laser cutting. Metode pada penelitian ini adalah menggunakan metode eksperimen dengan variable kecepatan sebesar 33 mm/s, 55 mm/s dan 88 mm/s, selanjutnya melihat cacat timbul dan melakukan pengukuran yang timbul dari kerataan plat menggunakan dial indikator digital. Hasil penelitian ini menunjukkan cacat timbul tertinggi pada rata-rata bagian A3 dan B3 sebesar 0,012 mm dengan diameter plat 50,2 dan 45,2 mm pada ketebalan plat aluminium 0,8 mm. Pada kecepatan 33 mm/s dapat disimpulkan bahwa timbulnya cacat tersebut sangat kecil berkisar antara 0,004 mm-0,008 mm. Kata Kunci:Laser Cutting; Cacat Timbul; Aluminium Alloy.

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“…Finally, to increase knowledge in the field of laser cutting, investigations have been carried out to correlate the monitoring signals with variations in the cutting parameters, such as laser power, process gas pressure, cutting velocity, or gas flow rate. Long et al [23] studied the transient regime of the temperatures in the laser cutting process of steel plates and Karanfil and Yalçin [24] presented a real-time monitoring system for cutting different materials. Those studies only display results when bad quality in the cutting process is observed, concluding that the signals are strongly connected to the cut quality.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Photodiode Monitoring in Laser Cutting

Garcia¹,

Ramos²,

Arrizubieta

et al. 2020

Applied Sciences

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The paper presents the results of an analysis based on the photodiode monitoring signals obtained during the laser cutting of aluminum and stainless steel plates. The mean level of the monitoring signal was measured and related to the process parameters and the quality achieved. The investigation was conducted in the visible and infrared spectra simultaneously for each experiment and a similar behavior at both spectra was observed, concluding the existence of a relationship between the monitoring signal, the quality of the performed cut, and the characteristics of the cutting scenario. Both visible and infrared monitoring signals were found not to vary as long as the parameter used values ensuring that the cut quality was good. Nevertheless, their mean values tended to increase as the cutting quality became worse. The measured intensity of the visible spectrum signal was associated with the vapor plume formation during the cutting process, whereas the infrared signal was related to the temperatures reached.

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Experimental investigation of transient temperature characteristic in high power fiber laser cutting of a thick steel plate

Cited by 25 publications

References 16 publications

Understanding the Changed Mechanisms of Laser Beam Fusion Cutting by Applying Beam Oscillation, Based on Thermographic Analysis

Understanding the Changed Mechanisms of Laser Beam Fusion Cutting by Applying Beam Oscillation, Based on Thermographic Analysis

Analisa Cacat Timbul pada Material Aluminium Akibat Pemotongan Menggunakan Laser Cutting

Analysis of Photodiode Monitoring in Laser Cutting

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