Cutting by a high power laser at a long distance without an assist gas for dismantling

Tahmouch, G.; Meyrueis, Patrick; Grandjean, P.

doi:10.1016/s0030-3992(97)00023-6

Cited by 14 publications

(4 citation statements)

References 3 publications

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“…In the present study, at lower frequency values, feed speed seems to have a lower effect on roughness than at high-frequency values. This suggestion is in accordance with the work of Tahmouch et al [11], who performed an experimental study of stainless steel plates up to 20 mm thickness without assistance gas in pulsed mode. This study revealed that low frequency and high peak power favor the use of high feed speed without significantly worsening surface finish.…”

Section: Regression Model For Rasupporting

confidence: 92%

Effect of Process Parameters on the Quality of Laser-Cut Stainless Steel Thin Plates

Buj-Corral

Costa-Herrero

Domínguez-Fernández

2021

Metals

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At present, laser cutting is currently employed to cut metallic plates, due to their good finish and dimensional quality, as well as because of the flexibility of the process to obtain different shapes. In the present paper, surface roughness, dimensional accuracy, and burr thickness of thin plates of 0.8 mm are studied as functions of different process parameters: pulse frequency, pulse width, and speed. Eight different experiments were performed according to a full 23 factorial design, with two replicates each. Square specimens of 10 mm × 10 mm were cut. Arithmetical mean roughness Ra was measured with a contact roughness meter, and the dimensions and burr thickness with a micrometer. Ra values ranged between 1.89 and 3.86 µm, dimensional error values between 0.22 and 0.93%, and burr thickness between 2 and 34 µm. Regression analysis was performed, and linear models were obtained for each response. Results showed that roughness depends mainly on frequency, on the interaction of frequency and pulse width and on pulse width. The dimensional error depends on pulse width, frequency, and the interaction between pulse width and speed. Burr thickness is influenced by frequency, pulse width, and the interaction between frequency and speed. Multi-objective optimization showed that, in order to simultaneously minimize the three responses, it is recommended to use high frequency (80 Hz), high pulse width (0.6 ms), and high speed (140 mm/min). The present study will help to select appropriate laser cutting conditions in thin plates, in order to favor good surface finish and dimensional accuracy, as well as low burr thickness.

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Section: Regression Model For Rasupporting

confidence: 92%

Effect of Process Parameters on the Quality of Laser-Cut Stainless Steel Thin Plates

Buj-Corral

Costa-Herrero

Domínguez-Fernández

2021

Metals

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“…The cutting speed obtained was more in case of CW laser, bare metal and thinner plate and the highest cutting speed recorded was 5 m/min at an optimum oxygen pressure of 3 bar. Experimental study [65] for cutting stainless steel sheets (up to 2 cm thick) from a long distance (1 m) without using any assist gas was performed in pulsed mode taking pulse frequency (100-200 Hz), peak power (2-5 kW) and cutting velocity (0.05-0.5 m/min) as process variables. The study reveals that low pulse frequencies and high peak powers were found to be favourable for higher cutting speeds.…”

Section: Materials Removal Rate (Mrr)mentioning

confidence: 99%

Laser beam machining—A review

Dubey¹,

Yadava²

2008

International Journal of Machine Tools and Manufacture

734

230

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“…The highest cutting speed recorded was 5 m/min at an optimum oxygen pressure of 3 bar. Tahmouch et al (1997) have performed the experimental study for cutting stainless steel sheets (up to 2 cm thick) from a long distance (1 m) without using any assist gas in pulsed mode taking pulse frequency (100-200 Hz), peak power (2-5 kW) and cutting velocity (0.05-0.5 m/min) as process variables. Their study revealed that less power density is required to cut without assist gas in comparison to classical cutting and sheets up to 2 cm thick can be cut successfully at a long distance.…”

Section: Cuttingmentioning

confidence: 99%