Development of <i>in situ</i> measurement system for welding deformation using digital cameras

Shibahara, Masakazu; Ikushima, Kazuki; Itoh, Shinsuke

doi:10.1179/1362171812y.0000000027

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…De Strycker et al 21 recorded the transient distortion of the welding pipe by the DIC and displacement sensor. Shibahara et al 22 measured the transient thermal deformation in a small butt welded test piece. Here, we selected the DIC device XJTUOM 20 as shown in Fig.…”

Section: Measuring Methods Of Welding Distortionmentioning

confidence: 99%

Welding distortion and inherent deformation under temporary tacking and its released states

Huang

Yin

et al. 2016

Science and Technology of Welding and Joining

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In the present study, the detailed welding distortion of bead welded plates under temporary tacking state and released state was predicted by thermal elastic-plastic finite element model (FEM) and also measured by the digital image correlation (DIC) method. It was found that the residual welding angular distortion can be reduced to about 50-60% by temporary tacking, while the residual transverse shrinkage and longitudinal shrinkage are less affected. Further, the welding distortion with different ratios of temporary tacking length to weld length for various dimensions of bead welded plates was quantitatively investigated by FEM. The inherent deformations which are described by the integrated values of residual plastic strains were proved to be the same before and after releasing the temporary tacking. The effect of temporary tacking on the welding distortion and inherent deformation were analysed in details.

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Section: Measuring Methods Of Welding Distortionmentioning

confidence: 99%

Welding distortion and inherent deformation under temporary tacking and its released states

Huang

Yin

et al. 2016

Science and Technology of Welding and Joining

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“…The focus of pre-process is on weld seam tracking; the in-process stage attaches more importance to the monitoring of keyhole shape stability; the off-process stage mainly deals with the form of molten pool after welding. 90 In addition, using different visual sensors to detect the same position has become a research focus in recent years. As shown in Fig.…”

Section: Advanced Research Of Laser Welding Monitoringmentioning

confidence: 99%

Review of laser welding monitoring

You

Gao

Katayama

2014

Science and Technology of Welding and Joining

192

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Laser welding, as a highly efficient processing technology, has been widely applied to manufacturing industry. This paper makes an overview on real time monitoring of laser welding. It begins with a detailed introduction to six typical sensors (photodiode, visual, spectrometer, acoustical sensor, pyrometer, plasma charge sensor) in laser welding detection. Then it makes a review on multi-sensor fusion technology in both laser welding monitoring and adaptive control. Last, subjects for future research concerning welding monitoring and control have been proposed. The paper concludes that the real-time monitoring of laser welding can provide a great amount of valid information about welding status to help effectively identify weld defects and realize adaptive control.

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“…Most experimental studies were conducted to monitor the welding distortion at limited points in welding history or final distortion shape. The in-situ distortion field measurement is only presented by Shibahara et al [5] and Guo et al [6] so far.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and In-Situ Measurement of Out-of-Plane Distortion in Thin Plate TIG Welding

et al. 2019

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Transient distortion of thin plate in the welding process usually has a complicated mode and large magnitude. Quantitative measurement and prediction of full-field distortion are challenging and rarely reported up to now. In this study, the out-of-plane distortion of a thin plate during the Tungsten Inert Gas (TIG) welding process was measured using the digital image correlation (DIC) method. A simulation model based on thermal elastic–plastic finite element method (FEM) and DIC measured geometric imperfection were developed for accurate prediction of the transient welding distortion. The numerical results and experimental data agreed very well in both out-of-plane deformation modes and magnitudes of the plate at different stages of welding. The maximum out-of-plane distortion was larger than 4 mm during welding which can cause instability of arc length and heat input. The distance change between welding torch and plate surface was investigated under different initial deflections of the plate before welding. The plate with flat geometry shows the minimum transient and final gap change. In addition, the relationship between heat input and welding distortion was clarified through a series of numerical analyses. Optimization of welding heat input can be performed based on numerical results to avoid excessive welding distortion.

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Development of in situ measurement system for welding deformation using digital cameras

Cited by 7 publications

References 8 publications

Welding distortion and inherent deformation under temporary tacking and its released states

Welding distortion and inherent deformation under temporary tacking and its released states

Review of laser welding monitoring

Finite Element Analysis and In-Situ Measurement of Out-of-Plane Distortion in Thin Plate TIG Welding

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