scholarly journals Improve the material absorption of light and enhance the laser tube bending process utilizing laser softening heat treatment

2018 ◽  
Vol 99 ◽  
pp. 15-18 ◽  
Author(s):  
Khalil Ibraheem Imhan ◽  
B.T.H.T. Baharudin ◽  
Azmi Zakaria ◽  
Mohd Idris Shah B. Ismail ◽  
Naseer Mahdi Hadi Alsabti ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tube Bending ◽  
Laser Tube ◽  
Bending Process ◽  
Absorption Of Light ◽  
Softening Heat

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.

scholarly journals An Analytical and Experimental Investigation of Average Laser Power and Angular Scanning Speed Effects on Laser Tube Bending Process

2017 ◽  
Vol 95 ◽  
pp. 05008 ◽  
Author(s):  
Khalil Ibraheem Imhan ◽  
B.T.H.T. Baharudin ◽  
Azmi Zakaria ◽  
Mohd Idris Shah b. Ismail ◽  
Nasser Mahdi Hadi Alsabti ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Laser Power ◽  
Scanning Speed ◽  
Tube Bending ◽  
Laser Tube ◽  
Average Laser Power ◽  
Bending Process ◽  
Angular Scanning ◽  
Average Laser

Development of Two-Step Softening Heat Treatment for Manufacturing 12Cr-ODS Ferritic Steel Tubes

2004 ◽  
Vol 41 (10) ◽  
pp. 1008-1012 ◽  
Author(s):  
Takeshi NARITA ◽  
Shigeharu UKAI ◽  
Takeji KAITO ◽  
Satoshi OHTSUKA ◽  
Toshimi KOBAYASHI
Keyword(s):  
Heat Treatment ◽  
Ferritic Steel ◽  
Steel Tubes ◽  
Softening Heat

Laser Assisted Cold Bending of High Strength Steels

2014 ◽  
Author(s):  
Erica Liverani ◽  
Alessandro Ascari ◽  
Alessandro Fortunato ◽  
Adrian Lutey
Keyword(s):  
Heat Treatment ◽  
High Strength Steels ◽  
High Strength ◽  
Processing Parameters ◽  
Cold Forming ◽  
Steel Sheets ◽  
Phase Lead ◽  
Cold Bending ◽  
Bending Process ◽  
Definition Of

This paper presents the feasibility of an innovative application of laser-assisted bending process. The high strength steel sheets bending, carried out after a laser heat treatment, is studied. Several strategies aimed at obtaining a ductile structure along the bending line, suitable for cold forming, are investigated. The influence of laser processing parameters on the microstructure, hardness and strength of the sheets are discussed and analyzed. In order to predict the temperature and ensure the repeatability and reliability of the process, a model for heat treatment simulation is developed. The study of the experimental data and the integration with the simulation of the heating phase lead to the definition of specific process parameters suitable for achieving a crack-free cold bending of high strength steels.

Innovative Machine Concepts for 3D Bending of Tubes and Profiles

2011 ◽  
Vol 473 ◽  
pp. 37-42 ◽  
Author(s):  
Matthias Hermes ◽  
Daniel Staupendahl ◽  
Christoph Becker ◽  
A. Erman Tekkaya
Keyword(s):  
Cross Sections ◽  
Cost Efficiency ◽  
Three Dimensional ◽  
Free Form ◽  
Tube Bending ◽  
Stretch Bending ◽  
Bending Process ◽  
New Process ◽  
Spinning Process ◽  
Springback Reduction

The paper deals with two new processes and developed special machines for profile and tube bending. The first process is a new roll-based machine for three-dimensional bending of profiles with symmetrical and asymmetrical cross-sections that has been developed. Compared to conventional processes like stretch bending, the advantage of Torque Superposed Spatial (TSS) Bending is the kinematic adjustment of the bending contour, leading to higher flexibility and cost efficiency especially in small batch production. The second process is the new process of Incremental Tube Forming (ITF). This process is based on a combination of a spinning process and kinematic free form bending of tubular semi-finished products. It is suitable for bending tubes two- and three-dimensionally to arbitrary contours and for manufacturing tailored tubes. The combined spinning and bending process leads to low bending forces with the possibility of a significant springback reduction.

Hardening mechanism associated with post-firing heat treatment of softening heat treated and then firing simulated Pd-Ag-Au alloy for bonding porcelain

2015 ◽  
Vol 42 (2) ◽  
pp. 95 ◽  
Author(s):  
Sung-Min Kim ◽  
Young-Jun Yu ◽  
Mi-Hyang Cho ◽  
Yong-Hoon Kwon ◽  
Hyung-Il Kim ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hardening Mechanism ◽  
Heat Treated ◽  
Softening Heat
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