Automatic Welding Research Articles

Вплив складу компонентів шихти порошкових стрічок системи легування C–Fe–Cr–Nb на хімічний склад і структуру наплавленого металу

Automatic Welding, 2022, №08. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Deformation-free TIG welding of AMg6 alloy with application of electrodynamic treatment of weld metal

The Paton Welding Journal, 2022, №08. International Scientific-Technical and Production Journal «The Paton Welding Journal» «The Paton Welding Journal» has been published monthly since 2000 in English, ISSN 0957-798X. «The Paton Welding Journal» is a cover-to-cover English translation of the «Avtomaticheskaya Svarka» (Automatic Welding) journal. The «Avtomaticheskaya Svarka» journal has been published monthly since 1948 in Russian, ISSN 005-111X.

Investigation of heat resistance of plasma coatings from TiAl intermetallic with application of parametric oxidation diagram

The Paton Welding Journal, 2022, №08. International Scientific-Technical and Production Journal «The Paton Welding Journal» «The Paton Welding Journal» has been published monthly since 2000 in English, ISSN 0957-798X. «The Paton Welding Journal» is a cover-to-cover English translation of the «Avtomaticheskaya Svarka» (Automatic Welding) journal. The «Avtomaticheskaya Svarka» journal has been published monthly since 1948 in Russian, ISSN 005-111X.

Exploration of the Automatic Welding Technology and Its Development

Exploration of the Automatic Welding Technology and Its Development

Research and development of weld tracking system based on laser vision

Aiming at the shortcomings of low real-time, low applicability, and low welding precision of automatic welding system, a seam tracking system based on laser vision is designed. Use the laser vision sensor to collect the weld image and transmits it to the industrial control computer for processing. Using a median filter to eliminate noise impacts such as arc and splash. Then, this paper focuses on the combination of an improved image threshold segmentation algorithm is used to solve the optimal threshold to obtain the binary image. And the information of laser stripe and the background are separated, overcomes the problems that the researchers have encountered before, such as the unrecognized global optimal solution, and the inaccuracy of the segmentation caused by system jitter. Finally, combined with the improved upper and lower average method, least square method, and Hough transform, the weld feature points are identified and more ideal real-time weld tracking is realized. The experimental results show that the method can accurately track the weld feature points, and improve the detection speed.

Structural design and kinematic analysis of a welding robot for liquefied natural gas membrane tank automatic welding

Owing to the complex structures of welding materials, special welding conditions, and challenges during the automatic welding of the liquefied natural gas (LNG) ship Mark III’s membrane tank, a series–parallel–series hybrid structure mobile welding robot having sufficient adaptability for welding corrugated plates in membrane tanks was designed in this study. The configuration of the hybrid robot had good workspace characteristics, and it could always maintain a certain distance and angle between the end of the welding torch and the weld line because of its detection and control system coordination. In this study, degrees of freedom, kinematic characteristics, workspace, and adaptability analyses were conducted for the hybrid mechanism. A simulation verification was performed, and a ripple-trajectory-following experiment was conducted using real objects. The simulation and experimental results showed that the welding robot had a reasonable mechanism design, smooth motion, and good terminal distance and angle control, thus meeting the requirements for automatic welding of corrugated plates in membrane tanks.

STUDYING THE CAUSES OF THE “GAS POROSITY” APPEARANCE ON SURFACE OF THE WELDED JOINTS

This article discusses the problem of the appearance of the “gas porosity” on the surface of welded seams during automatic arc welding using a ceramic flux. The factors of the gases’ appearance in the zone of the welded seam considered: increased humidity of the charge components used in the production of flux and the effect of the pyrohydrolysis reaction of calcium fluoride. The samples of fluorspar used to manufacture the flux were tested for moisture content after various storage conditions. The results were compared with the data obtained by heating pure calcium fluoride. They indicate that pure calcium fluoride absorbs less moisture than all the fluorspar samples. Thus, despite the quality control throughout the entire production cycle of the ceramic flux, the purity of the initial charge components directly affects the quality of the final product.

A Seam Tracking Method Based on an Image Segmentation Deep Convolutional Neural Network

Vision-based welding seam tracking is an important and unique branch of welding automation. Active vision seam tracking systems achieve accurate feature extraction by using an auxiliary light source, but this will introduce extra costs and the real-time performance will be affected. In contrast, passive vision systems achieve better real-time performance and their structure is relatively simple. This paper proposes a passive vision welding seam tracking system in Plasma Arc Welding (PAW) based on semantic segmentation. The BiseNetV2 network is adopted in this paper and online hard example mining (OHEM) is used to improve the segmentation effect. This network structure is a lightweight structure allowing effective image feature extraction. According to the segmentation results, the offset between the welding seam and the welding torch can be calculated. The results of the experiments show that the proposed method can achieve 57 FPS and the average error of the offset calculation is within 0.07 mm, meaning it can be used for real-time seam tracking.

Application of Intelligent Technology on Tunnel Steel Structure Factory

At present, the construction of tunnel steel structure factories has been common, but most of them are still on the low end. In addition, the manual processing modes face certain problems, such as high waste rate, low efficiency, and discrete welding of steel components. To address these problems, this paper introduces an intelligent management cloud platform, aiming to realize unmanned control methods and construct an intelligent tunnel steel component processing plant. There are four main production lines in the intelligent steel structure factory. First, an intelligent production line of a tunnel grille arch effectively improves the production efficiency, production quality, and dust removal effect of the grille arch through the automatic welding technology of a reinforcement mechanism-based welding robot. Second, a processing line of a steel pipe for tunnel construction improves the overall processing efficiency, saves costs, and reduces work intensity by using an intelligent numerical control system, a pneumatic clamping device, a plasma cutting hole assembly, and a 360-degree automatic rotation system. Third, an automatic feeding platform of section steel arch production line adopts the six-axis robot sensor clamping connecting plate positioning and six-axis robot sensing three-plane automatic welding system, which not only compensates for the defects of manual production but also realizes the reduction, increases efficiency, and improves welding quality and precision. Fourth, an automatic steel mesh production line saves much labor and enhances site management and production efficiency through vertical and horizontal reinforcement pay-off racks. Overall, in this study, the construction goals of informatization, intellectualization, and personnel downsizing of the tunnel steel structure processing have been achieved.

DEVELOPMENT OF A DIGITAL TWIN OF MOTOMAN MH-50 INDUCTRIAL ROBOT-MANIPULATOR FOR WELDING OPERATIONS OF COMPLEX STRUCTURES

At the present time automatic welding machines are used for welding operations in the production of electric-welded pipes. However, industrial robots are used when welding complex structures consist of pipes of different diameters and bending radius. Unlike welding machines, robots move according to a set coordinate, thus making it possible to obtain welding constructions that “classical” welding machines are not able to perform or require considerable time for their readjustment. Moreover, welding robots-manipulators can perform additional operations: pre-cleaning of the joint, weld preparation and cleaning from dirt. Methods of setting (setting coordinates) of welding robots-manipulators are considered. It was noted that when making settings on the robot's panel it is necessary to stop the technological process, therefore a more rational way is the preliminary imitation of the welding process by using a digital twin of an industrial robot. Using of digital twins of robots-manipulators is often connected with serious financial expenses, therefore development on the basis of the simplified mathematical model of the digital twin is actual, that allows fulfilling the technological process of welding of new kinds of difficult designs by virtual way. Here is a description of a digital twin of an industrial robot-manipulator Yaskawa Motoman MH50-35, developed in Matlab Simulink environment. The main task of developing the digital twin was to create a system of automatic control of the rotation angle on the basis of the position regulator. The elaborated digital twin was tested; the accuracy of processing the wrist rotation assignment is +-0.0001 rad, there is no position overshoot, and the time of a full wrist revolution reaches 1.07 s. The possibility has been shown to use the developed twin as a digital twin of an industrial welding robot taking into account the accepted assumptions.

Корозійна тривкість плазмових покриттів, отриманих з композиційних порошків на основі TiAl з доданням неметалевих тугоплавких сполук

Automatic Welding, 2022, №07. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Corrosion resistance of plasma coatings produced from composite TiAl-based powders with the addition of non-metallic refractory compounds

The Paton Welding Journal, 2022, №07. International Scientific-Technical and Production Journal «The Paton Welding Journal» «The Paton Welding Journal» has been published monthly since 2000 in English, ISSN 0957-798X. «The Paton Welding Journal» is a cover-to-cover English translation of the «Avtomaticheskaya Svarka» (Automatic Welding) journal. The «Avtomaticheskaya Svarka» journal has been published monthly since 1948 in Russian, ISSN 005-111X.

Ефективність комбінованого газошлакового захисту при MIG наплавленні мідних сплавів на сталь

Automatic Welding, 2022, №07. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Calculated evaluation of stress-strain states of welded joints of aluminium AMg61 alloy under the action of electrodynamic treatment of weld metal in the process of fusion welding

The Paton Welding Journal, 2022, №07. International Scientific-Technical and Production Journal «The Paton Welding Journal» «The Paton Welding Journal» has been published monthly since 2000 in English, ISSN 0957-798X. «The Paton Welding Journal» is a cover-to-cover English translation of the «Avtomaticheskaya Svarka» (Automatic Welding) journal. The «Avtomaticheskaya Svarka» journal has been published monthly since 1948 in Russian, ISSN 005-111X.

Structure and properties of welded joints of Ni<sub>3</sub>Al intermetallic

The Paton Welding Journal, 2022, №07. International Scientific-Technical and Production Journal «The Paton Welding Journal» «The Paton Welding Journal» has been published monthly since 2000 in English, ISSN 0957-798X. «The Paton Welding Journal» is a cover-to-cover English translation of the «Avtomaticheskaya Svarka» (Automatic Welding) journal. The «Avtomaticheskaya Svarka» journal has been published monthly since 1948 in Russian, ISSN 005-111X.

Застосування шаруватого композиційного матеріалу на основі сплавів алюмінію та титану для отримання зварних тришарових стільникових панелей

Automatic Welding, 2022, №07. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Струмопідвідний кристалізатор в електрошлакових технологіях

Automatic Welding, 2022, №07. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Наплавлення пресового інструмента для обробки кольорових металів самозахисним порошковим дротом ПП-50Х6В2ГСМФА

Automatic Welding, 2022, №07. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Корозійно-механічна тривкість зварних з’єднань сплаву АМг5М, отриманих у різних просторових положеннях стиків

Automatic Welding, 2022, №07. Journal «AVTOMATICHESKAYA SVARKA» Monthly scientific-technical and production journal. ISSN: 0005-111X, Since 1948. Russian version of «The PATON Welding Journal» Text in Russian, contents and summaries in English. The Journal presents a wide range of scientific-technical and promotion information in the field of technologies, equipment and materials for welding, surfacing, brazing, and deposition of protective coatings.

Metallurgical processes in the weld metal at electron beam welding of 01570 aluminium alloy

The Paton Welding Journal, 2022, №07. International Scientific-Technical and Production Journal «The Paton Welding Journal» «The Paton Welding Journal» has been published monthly since 2000 in English, ISSN 0957-798X. «The Paton Welding Journal» is a cover-to-cover English translation of the «Avtomaticheskaya Svarka» (Automatic Welding) journal. The «Avtomaticheskaya Svarka» journal has been published monthly since 1948 in Russian, ISSN 005-111X.