نتایج جستجو برای: weld line

تعداد نتایج: 417215  

2003
C S Wu J Q Gao X F Liu Y H Zhao

The common commercial charge coupled device (CCD) camera is combined with a composite light filter to form a vision sensing system of low cost. It can capture the whole image of a weld pool clearly during constant-current gas tungsten arc welding (GTAW). Based on the imageprocessing algorithm, the edges of the weld pool under different welding conditions can be extracted. Calibration is made to...

2008
H. Dai P. J. Withers

Weld residual stresses often approach, or exceed, the yield strength of the material, with serious implications for the integrity of engineering structures. It is not always feasible to measure residual stresses, so integrity assessments often rely heavily on numerical models. In ferritic steels, the credibility of such models depends on their ability to account for solid-state phase transforma...

2009
Fanhuai Shi Xixia Huang Ye Duan Shanben Chen

Observing the weld pool and measuring its geometrical parameters are important issues for automated and robotic welding, wherein the visual detection and localization of weld pool are critical steps. Previous methods of visual measurement of weld pool usually assume that the weld pool exists in a predefined area, and its contour should be a specific geometric shape and size. Furthermore, previo...

Journal: :IJMIC 2006
Gohar Saeed

A substantially successful technology that has emerged is the use of electro-optics, which has been expanded into the realm of ‘machine vision’ with the rapid advance in optical sensor technology and computer processing power. The basic principle of the optical sensor has remained unchanged over the years. Charge-Coupled Devices (CCDs), laser diodes and microprocessors form the basis of this ty...

2012
P. B. Sakthivel A. Jagannathan

The authors of this experimental research work have made an attempt to experimentally investigate the ultimate flexural load of ferrocement slabs of size 700mm. X 200mm. X 15mm. (thickness) reinforced with PVC coated steel weld mesh, and compare the results with slabs using GI-coated steel weld mesh, by varying the number of layers from 1-3. Ordinary Portland Cement, locally available river san...

2004
Z. CAO Z. YANG X. L. CHEN

-S 169 WELDING JOURNAL ABSTRACT. A 3-D transient numerical model was developed for simulation of gas metal arc (GMA) weld pools with free surface and droplet impact effects. This effort predicted a moving GMA weld pool by considering not only the heat transfer and fluid flow driven by surface tension gradient, electromagnetic force, buoyancy, and arc pressure, but also detailed information abou...

2004
C. M. Chen R. Kovacevic

The joining of a 6-mm thickness Al 6061 to AISI 1018 steel has been performed by the combined effects of fusion and solid state welding. The process is derived from friction stir welding (FSW) but with an adjustable offset of the probe location with respect to the butt line. Metallographic studies by optical microscopy, electron probe microscopy, and the utilization of the X-ray diffraction tec...

2015
Donatella CERNIGLIA

Friction stir welding (FSW) is an innovative process that has been successfully used in joining aluminum alloys, normally difficult to weld. Important advantages over fusion welding are better retention of baseline material properties, lower residual stresses and excellent mechanical properties. Defects that occur in FSW joints are due to improper tooling or setup. Non-destructive techniques us...

2012
Eduardo José Lima Alexandre Queiroz Bracarense

It is very well known that the use of robotics in the industry increases productivity and quality in many aspects. It is also well known that some adjustments have to be made to grant payback for the investment and to reach the expected results. Today, the robotization is known as an alternate technique for production, increasing qualitative and quantitative competence of its industries. One po...

2008
Ji-hyoung Lee Jong-jun Kim

This paper introduces a carriage-type welding robot which is to implement into double hull assembly line in shipbuilding. The developed robot consists of 5-axis carriage-type body, a controller, and a welding power supply and is capable of welding fully automatically such as a commercial industrial robot system without any interruption by an operator in a cell which consists of vertical weld-li...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید