Investigation of optimum condition in oxygen gas-assisted laser cutting

Golnabi, H.; Bahar, M. K.

doi:10.1016/j.optlastec.2008.08.001

Cited by 22 publications

(11 citation statements)

References 10 publications

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“…Also, large HAZ often leads to change in material properties such as increase in brittleness, hardness, corrosion compliance, microcracks, poor weldability and formability, etc. [3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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An investigation on co-axial water-jet assisted fiber laser cutting of metal sheets

Madhukar

Mullick

Nath

2016

Optics and Lasers in Engineering

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Section: Introductionmentioning

confidence: 99%

“…In general, the behaviour of these defects varies with laser parameter as the following: The kerf width decreases with increase of cutting speed and increases with laser power [3] and gas pressure [4]. However, the kerf taper was reported decreasing with laser energy, Thawari et al [5] and Rao et al [6].…”

Section: Introductionmentioning

confidence: 99%

An investigation on co-axial water-jet assisted fiber laser cutting of metal sheets

Madhukar

Mullick

Nath

2016

Optics and Lasers in Engineering

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“…The ability of the assist gas to remove molten material from the cutting front is reduced as the work-piece becomes thicker. Insufficient gas flow to the cutting front decreases the cutting speed, and generates burr, dross, and recast layers (5), (6) .…”

Section: Introductionmentioning

confidence: 99%

Development of a 2-DOF Controlled Magnetic Drive Actuator for Laser Beam Cutting

Zhang

Shinshi

Fukuoka

et al. 2013

JAMDSM

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Laser beam cutting (LBC) is a non-contact machining method that is widely used in industry. In order to improve cutting speed and reduce the consumption of assist gas, it is necessary to employ a machining method that applies a suitable eccentricity between the laser beam axis and the assist gas nozzle axis. This paper describes the development of a high-speed, high-precision, magnetic drive actuator, which can be attached to a conventional LBC machine to control the relative displacement between the laser beam axis and the assist gas nozzle axis in two orthogonal directions. First, a magnetic drive actuator is designed and fabricated. In the actuator, the motions of the lens in the radial directions are controlled by electromagnets, and the motions in the other directions are constrained by elastic hinges. Second, a compensation method for the zero point of the displacement sensors that are used to measure the displacements of the lens in the radial direction and an adaptive control method for the actuator are presented. Finally, the effectiveness of the presented control method is verified, and the positioning performance of the actuator is evaluated through experiments. The experimental results showed that the vibration of the lens was reduced using the presented control method, and the actuator had a positioning resolution of 0.75 µm, a bandwidth greater than 133 Hz, and a positioning stroke of 1 mm.

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“…In literature, there are many related studies on laser cutting [1][2][3][4][5][6][7][8][9]. Despite its widespread usage, laser cutting with machine-vision ability is rarely encountered in literature.…”

Section: Introductionmentioning

confidence: 99%

A novel rotation-invariant template matching based on HOG and AMDF for industrial laser cutting applications

Arslan

Demirci

Altun

et al. 2013

2013 9th International Symposium on Mechatronics and Its Applications (ISMA)

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A new real-time rotation-invariant template matching is proposed for industrial laser cutting applications. The technique is based on Histogram of Oriented Gradients (HOG) algorithm to remove rotational angle before the template matching process. It exploits the HOG and the Average Magnitude Difference Function (AMDF) features for rotationinvariance. Since HOG features are robust against illumination effects, the proposed algorithm is suitable for harsh industrial environments. The final aim of this study is to devise a method to detect the contour of an object, which will automatically be cut from a sheet of material.

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Investigation of optimum condition in oxygen gas-assisted laser cutting

Cited by 22 publications

References 10 publications

An investigation on co-axial water-jet assisted fiber laser cutting of metal sheets

An investigation on co-axial water-jet assisted fiber laser cutting of metal sheets

Development of a 2-DOF Controlled Magnetic Drive Actuator for Laser Beam Cutting

A novel rotation-invariant template matching based on HOG and AMDF for industrial laser cutting applications

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