A knowledge-based multipass welding distortion estimation method for a multi-robot welding off-line programming and simulation software

Lund, Hannu; Penttilä, Sakari; Skriko, Tuomas

doi:10.1016/j.promfg.2020.10.043

Cited by 6 publications

(2 citation statements)

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“…Depending on the needs and the requirements of the welding and quality measures, various sensor technologies can be utilized during welding. Sensoring and measuring can be conducted before, during, and/or after welding, e.g., by means of laser triangulation scanning [37], which can enable jigless multi-robot welding applications [38]. The quality and adaptivity data can also be gathered with other optical devices and systems (active or passive vision) [39], thermographic cameras, as well as acoustic emission, magnetic field, and radiographic sensors.…”

Section: Quality Managementmentioning

confidence: 99%

Overview on the digitized production of welded steel structures

2022

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This paper presents a concept and practical topics involved in digitized production. The term “production” denotes the design, fabrication, and service life of a product, which in this case elaborates on welded steel structures. This includes the required information for guiding all the process stages of the chosen material back to its re-melting, following the material flow in a fully digitized form. This concept enables an increase in production quality at a higher level while minimizing the risk of human errors. Automation of the short-run production of steel structures for demanding applications is also a key goal, together with securing a cost-efficient process. Typically, such structures are fabricated from high- or ultra-high-strength steels. Though challenging, reaching these aims seems to be realistic by applying advanced fatigue design methods, using high-quality robotic welding and receiving information about the real loading of the structure.

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Section: Quality Managementmentioning

confidence: 99%

Overview on the digitized production of welded steel structures

2022

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“…However, the prerequisite for these technologies to increase deposition rate is to increase the welding current. The heat input of base metal increases accordingly, which is prone to defects such as undercut [9] and welding deformation [10] .…”

Section: Introductionmentioning

confidence: 99%

Suppression of humping bead in high-speed triple-wire gas indirect arc welding

Wang

Zhang

Dong

et al. 2022

Int J Adv Manuf Technol

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：Triple-wire gas indirect arc welding (TW-GIA) is a new technology with the advantages of low heat input and high deposition rate. However, the humping bead restricts the improvement of welding efficiency. In this article, the high-speed cameras and infrared thermal imaging system were used to characterize the formation mechanism of the TW-GIA humping bead. The physical model was established to discuss the force mechanism of the weld poor. And The influence of process parameters on humping bead was studied. The results showed that the increase of the welding angle reduced the arc pressure and droplet impact force in the opposite direction of welding, which was beneficial to eliminate the hump. When the welding height was lower than 3 mm, the excessive arc pressure led to the humping bead with arc crater. When the welding height was greater than 20 mm, the distance between the droplets of side wires was far, forming the humping bead with "double bead" defect. In addition, the flow distance of the liquid metal shortened as the welding current decreased, which could suppress the humping bead. When the ratio of the total wire feeding speed to the welding speed was 10, the critical current was 360 A, and the critical current increased as the ratio increased. The maximum TW-GIA welding speed of bead on plate was 4.2 m/min, which was 137% higher than that of high-speed GMAW.

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