Laser tube technology ‐ A new automation procedure in end‐preparation of CHS‐to‐CHS intersections welded by partial joint penetration (PJP): design, constructional and experimental remarks

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 2451-2458
Author(s):  
Augusto Mastropasqua ◽  
Massimo Majowiecki ◽  
Claudio Duarte
Keyword(s):  
Laser Tube

scholarly journals Experimental Investigation of the Effects of Irradiating Schemes in Laser Tube Bending Process

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1123
Author(s):  
Mehdi Safari ◽  
Ricardo J. Alves de Sousa ◽  
Jalal Joudaki
Keyword(s):  
Laser Beam ◽  
Contact Process ◽  
Steel Tube ◽  
Thickness Variation ◽  
Tube Bending ◽  
Lateral Bending ◽  
Bending Angle ◽  
Laser Tube ◽  
Bending Process ◽  
Thickness Variations

The laser tube bending process (LTBP) process is a thermal non-contact process for bending tubes with less springback and less thinning of the tube. In this paper, the laser tube bending process will be studied experimentally. The length of irradiation and irradiation scheme are two main affecting process parameters in the LTBP process. For this purpose, different samples according to two main irradiation schemes (Circular irradiating scheme (CIS) and axial irradiating scheme (AIS)) and different lengths of laser beam irradiation (from 4.7 to 28.2 mm) are fabricated. The main bending angle of laser-bent tube, lateral bending angle, ovality, and thickness variations is measured experimentally, and the effects of the irradiating scheme and the length of irradiation are investigated. An 18 mm diameter, 1 mm thick mild steel tube was bent with 1100 Watts laser beam. The results show that for both irradiating schemes, by increasing the irradiating length of the main and lateral bending angle, the ovality and thickness variation ratio of the bent tube are increased. In addition, for a similar irradiating length, the main bending angle with AIS is considerably higher than CIS. The lateral bending angle by AIS is much less than the lateral bending angle with CIS. The results demonstrate that the ovality percentage and the thickness variation ratio for the laser-bent tube obtained by CIS are much more than the values associated with by AIS laser-bent tube.

Tapered laser tube

1977 ◽  
Vol 28 (4) ◽  
pp. 150-150
Author(s):  
J Briscoe
Keyword(s):  
Laser Tube ◽  
Tapered Laser

Inexpensive He-Ne laser tube construction

1977 ◽  
Vol 9 (2) ◽  
pp. 78-80
Author(s):  
K.G. Hernqvist ◽  
R.W. Longsderff
Keyword(s):  
Laser Tube

A novel path strategy design for precise 2D and 3D laser tube forming process; experimental and numerical investigation

Optik ◽  
2020 ◽  
Vol 206 ◽  
pp. 164302 ◽  
Author(s):  
S. Esmaeil Khandandel ◽  
S.M. Hossein Seyedkashi ◽  
Mahmoud Moradi
Keyword(s):  
Numerical Investigation ◽  
Forming Process ◽  
Tube Forming ◽  
Laser Tube ◽  
Strategy Design ◽  
2D And 3D

scholarly journals Ein Ionen-Laser für metrologische Anwendungen

1970 ◽  
Vol 25 (1) ◽  
pp. 156
Author(s):  
E. Engelhard ◽  
F. Spieweck
Keyword(s):  
Vapour Pressure ◽  
Laser Tube ◽  
Pressure Controlled

Abstract A xenon isotop laser has been built which emits Xe(II)-lines in the visible. The vapour pressure controlled laser tube operates at low current. Preliminary vacuum wavelength values have been found to be (542.065 49±0.000 02) nm and (627.254 64±0.000 01) nm.

scholarly journals Modeling of the Radial Heat Flow and Cooling Processes in a Deep UltravioletCu+Ne-CuBr Laser

2009 ◽  
Vol 2009 ◽  
pp. 1-16
Author(s):  
Iliycho Petkov Iliev ◽  
Snezhana Georgieva Gocheva-Ilieva ◽  
Krassimir Angelov Temelkov ◽  
Nikolay Kirilov Vuchkov ◽  
Nikola Vassilev Sabotinov
Keyword(s):  
Power Density ◽  
Copper Ion ◽  
Nonlinear Boundary Conditions ◽  
Simple Expression ◽  
Air Cooling ◽  
Gas Temperature ◽  
Laser Tube ◽  
Copper Bromide ◽  
Forced Air ◽  
The One

An improved theoretical model of the gas temperature profile in the cross-section of an ultraviolet copper ion excited copper bromide laser is developed. The model is based on the solution of the one-dimensional heat conduction equation subject to special nonlinear boundary conditions, describing the heat interaction between the laser tube and its surroundings. It takes into account the nonuniform distribution of the volume power density along with the radius of the laser tube. The problem is reduced to the boundary value problem of the first kind. An explicit solution of this model is obtained. The model is applied for the evaluation of the gas temperature profiles of the laser in the conditions of free and forced air-cooling. Comparison with other simple models assumed constant volume power density is made. In particular, a simple expression for calculating the average gas temperature is found.

Sign in / Sign up

Export Citation Format

Share Document