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Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society最新文献

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My History for Weldin 我的焊接历史
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/JJWS.90.295
Kyohei Maeda
{"title":"My History for Weldin","authors":"Kyohei Maeda","doi":"10.2207/JJWS.90.295","DOIUrl":"https://doi.org/10.2207/JJWS.90.295","url":null,"abstract":"","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"90 1","pages":"295-297"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68677802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Innovation of Steel Manufacturing Process Using Cyber Physical System 基于网络物理系统的钢铁制造工艺创新
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/JJWS.90.69
O. Yamaguchi
{"title":"Innovation of Steel Manufacturing Process Using Cyber Physical System","authors":"O. Yamaguchi","doi":"10.2207/JJWS.90.69","DOIUrl":"https://doi.org/10.2207/JJWS.90.69","url":null,"abstract":"","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"90 1","pages":"69-75"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68679952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Simulation of Wire+arc Additive Manufacturing Process by GMAW Weld Pool Model 基于GMAW焊池模型的线材+电弧增材制造过程数值模拟
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/JJWS.90.98
Y. Ogino
{"title":"Numerical Simulation of Wire+arc Additive Manufacturing Process by GMAW Weld Pool Model","authors":"Y. Ogino","doi":"10.2207/JJWS.90.98","DOIUrl":"https://doi.org/10.2207/JJWS.90.98","url":null,"abstract":"","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"36 1","pages":"98-101"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68680624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of multi-spectral camera for biomedical use to two-color temperature measurement in welding phenomena 生物医学用多光谱相机在焊接双色温度测量中的应用
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/qjjws.39.241
K. Nomura, H. Okuda, T. Sano
{"title":"Application of multi-spectral camera for biomedical use to two-color temperature measurement in welding phenomena","authors":"K. Nomura, H. Okuda, T. Sano","doi":"10.2207/qjjws.39.241","DOIUrl":"https://doi.org/10.2207/qjjws.39.241","url":null,"abstract":"This study tested a two-color temperature measurement method using a multi-spectral camera designed for biomedical use. We selected the images of 735 nm and 930 nm as wavelengths. Two calibrations were performed before using them for temperature conversion. One was sensitivity calibration between wavelengths, which was conducted by heating the steel surface coated with blackbody spray from the opposite surface and comparing it with the temperature measured by thermography. Another calibration was a pixel shift that took into account the array of elements. This is a correction peculiar to a multi-spectral camera, and it was possible to eliminate a steep temperature error at the end of the temperature discontinuity. In this report, the electrode temperature of the gas tungsten arc was reported as an application example.","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67995927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Study on Reducing Oxygen Content in Weld Metals for Narrow Groove GMA Welding with a Local CO2 Adding Nozzle 局部添加CO2喷嘴降低窄坡口GMA焊焊缝金属氧含量的研究
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/qjjws.39.301
Tomoaki Nakashima, Y. Kisaka, F. Kimura, M. Ohara, S. Tashiro, Manabu Tanaka
{"title":"A Study on Reducing Oxygen Content in Weld Metals for Narrow Groove GMA Welding with a Local CO2 Adding Nozzle","authors":"Tomoaki Nakashima, Y. Kisaka, F. Kimura, M. Ohara, S. Tashiro, Manabu Tanaka","doi":"10.2207/qjjws.39.301","DOIUrl":"https://doi.org/10.2207/qjjws.39.301","url":null,"abstract":"高靭性を要求される一部の低合金鋼 (炭素鋼 )を対象とし たGMA(MIG)溶接では,アーク安定化のためにCO2やO2な どの酸化性のガスを微量に含む不活性ガスがシールドガス として用いられており ,この酸化性ガスの混合割合が増 加するほど溶接金属中の酸素量が増加し,靱性が低下する ことが知られている .アークの安定と溶接金属の高靭性 を両立させる方法として,酸化性ガスの添加割合を低減さ せた溶接法が種々検討されている.例えば,特殊形状のノ ズルを用いて不活性ガスと活性ガスを個別にアーク雰囲気 中へ添加する方法が検討されており ,ビードオンプレー ト溶接において溶接金属中の酸素量を数十 ppm程度に低減 できることが報告されている. 一方で,高能率なアーク溶接法である狭開先溶接法が, 特に自動化が容易なMAG/MIG溶接において適用されて いる.しかしながら,上述の溶接法を狭開先溶接に適用 しようとすると,アークの偏向が発生し,溶接欠陥の要因 となる等,課題が多い為 に実用化に至っていない. そこで本研究では,小型かつ軽量の特殊ノズルを用い、 さらにショートパルスアークと組合わせて狭開先溶接への 適用を試みた.実施内容として,主ガスとして不活性ガス (Ar) を,局所添加ガスとして活性ガス (CO2)をそれぞれ個別に狭 開先内に導入することが可能な Fig. 1に示す特殊形状のノズ ルを作製した.そして様々な活性ガス添加条件やアーク溶 接条件下での溶接実験を行い,それらの条件が溶接金属中 の酸素量やアーク現象に及ぼす影響について調査した.さ らに,当該溶接を模擬したシミュレーションを実施し,活","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67996001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automatic penetration bead welding technology in horizontal position using weld pool image recognition 利用焊缝池图像识别技术实现水平位置自动焊透
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/qjjws.39.309
Keitaro Ozaki, N. Furukawa, Akira Okamoto, Keito Ishizaki, Yuji Kimura, Takeshi Koike
{"title":"Automatic penetration bead welding technology in horizontal position using weld pool image recognition","authors":"Keitaro Ozaki, N. Furukawa, Akira Okamoto, Keito Ishizaki, Yuji Kimura, Takeshi Koike","doi":"10.2207/qjjws.39.309","DOIUrl":"https://doi.org/10.2207/qjjws.39.309","url":null,"abstract":"While automatic welding process has been introduced at the manufacturing site today to improve the welding efficiency and weldment quality, there are still some joint which is difficult to be automatically welded. Horizontal penetration bead welding in Shipyard, for instance, where weld pool shape varies easily and tracing technique for its variation is required, is manually welded by skilled welder. In order to automate such skillful welding, our research team works on development of weld pool recognition technique with visual sensor and control robot system. In this research, feature points of weld pool are recognized by using CNNs based learning model in real time during CO 2 welding on V-groove joint with gap variation. The chemical composition of the flux cored wire is specially designed for bridge performance and back bead quality. It is adopted the straight stepped weaving to adapt a weld pool shape with gap variation. In order to reduce work processes of ceramic backing attachment, with and without ceramic backing welding has been studied in this research. From the images by a CMOS camera, it is confirmed that the pool lead length and width ( PL L , PL W ) which are calculated by feature points are recognized with high accuracy by CNNs learning model. On the other hand, it is also found that a large corpus of labeled images is required to obtain the high performance of learning model. In order to reduce costly expert annotation, we propose a self-training method which uses unlabeled images. As a result, it is confirmed that the PL L and PL W are recognized accurately by the self-training method proposed. Finally, results of demonstration of automatic welding with real time image recognition and robot control are described. These results show that horizontal penetration bead welding with and without ceramic backing is possible to be automated by robot system proposed.","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67996045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inherent Strain Analysis Using Experimental Multi-layer Model for Electron-Beam-Melted Parts 基于多层实验模型的电子束熔化件固有应变分析
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/QJJWS.39.1
S. Tadano, Y. Nakatani, T. Hino, Haruki Ohnishi, Daisuke Tsuji, Tooru Tanaka
{"title":"Inherent Strain Analysis Using Experimental Multi-layer Model for Electron-Beam-Melted Parts","authors":"S. Tadano, Y. Nakatani, T. Hino, Haruki Ohnishi, Daisuke Tsuji, Tooru Tanaka","doi":"10.2207/QJJWS.39.1","DOIUrl":"https://doi.org/10.2207/QJJWS.39.1","url":null,"abstract":"In additive manufacturing of metal products, predicting deformations induced during the process is indispensable for improving the quality of the products and reducing the post-process machining time. Finite element analysis (FEA) based on the inherent strain method using a voxel mesh is an effective prediction method due to its reasonable analysis time, and to efficiently implement the prediction, a method of easily and accurately defining the inherent strain value is required. In this study, an analysis method based on multi-layer model theory was proposed to evaluate the inherent strain applicable to electron beam melting. The inherent strains obtained by the analysis were - 0.835% and - 3.42% for 12Cr steel and Co alloy, respectively. As a verification result using the FEA based on the analyzed inherent strain, the out-of-plane deformation of the base plate and the thickness of the manufactured parts were evaluated with accuracies of ± 2.0mm and ± 0.5mm, respectively.","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67996155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Evaluation of Butt Joint Produced by a Hot-Wire CO2 Arc Welding Method 热丝CO2弧焊对接接头的评价
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/QJJWS.39.96
S. Wonthaisong, S. Shinohara, K. Shinozaki, R. Phaoniam, Motomichi Yamamoto
{"title":"Evaluation of Butt Joint Produced by a Hot-Wire CO2 Arc Welding Method","authors":"S. Wonthaisong, S. Shinohara, K. Shinozaki, R. Phaoniam, Motomichi Yamamoto","doi":"10.2207/QJJWS.39.96","DOIUrl":"https://doi.org/10.2207/QJJWS.39.96","url":null,"abstract":"The purpose of this study was to develop a high-efficiency and low-heat-input CO 2 arc-welding process using hot-wire feeding. A previous paper showed that the proposed hot-wire CO 2 arc-welding process has the potential to simultaneously achieve both high efficiency and low heat input. This paper investigated the production of a sound joint with only two welding passes on a butt joint of 20mm-thick steel plates with no defects or unstable welding phenomena using the developed hot-wire CO 2 arc-welding process. Welding condition optimization was investigated using high-speed imaging and cross-sectional observations. The optimized conditions, which were the combinations of the welding current and hot-wire feeding speed as 350A and 7.5m/min, 400A and 5m/min, 450A and 5m/min, 500A and 5m/min, derived to avoid the presence of defects and molten metal precedence, which achieved sound welded joints possessing adequate properties of strength and toughness.","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67996243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
FEM Simulation of Stress Fields During Resistance Spot Welding 电阻点焊应力场的有限元模拟
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/JJWS.90.194
Manabu Fukumoto, H. Ueda
{"title":"FEM Simulation of Stress Fields During Resistance Spot Welding","authors":"Manabu Fukumoto, H. Ueda","doi":"10.2207/JJWS.90.194","DOIUrl":"https://doi.org/10.2207/JJWS.90.194","url":null,"abstract":"","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"90 1","pages":"194-198"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68676925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Technique for Preventing Solidification Cracking at the end part in One-Side Submerged Arc Welding 防止单面埋弧焊端部凝固裂纹的技术
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI: 10.2207/JJWS.90.269
Hiroyoshi Yokota
{"title":"A Technique for Preventing Solidification Cracking at the end part in One-Side Submerged Arc Welding","authors":"Hiroyoshi Yokota","doi":"10.2207/JJWS.90.269","DOIUrl":"https://doi.org/10.2207/JJWS.90.269","url":null,"abstract":"","PeriodicalId":39980,"journal":{"name":"Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society","volume":"90 1","pages":"269-271"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68677708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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