{"title":"Droplet spatter suppression in laser lap welding of galvanized sheets using additional coaxial annular laser source","authors":"Yi Qi , Genyu Chen , Dezheng Liu","doi":"10.1016/j.optlastec.2022.107902","DOIUrl":null,"url":null,"abstract":"<div><p>This study is to prevent droplet spatter in laser welding of galvanized sheets. Three-dimensional welding simulation model is also established and analyzed to reveal the relationship between keyhole oscillation and flow behavior. It is found major reason for droplet spatter is the impact force of the reflux and eddy of the metal pool toward the keyhole. Keyhole oscillates seriously and reflux impact causes energy exchange discontinuity, making the keyhole opening intermittent closed in traditional Gaussian laser source alone. While certain output proportion of coaxial annular and Gaussian laser source could considerably improve impact resistance on the reflux and suppress droplet spatter obviously. Weld appearance is relatively beautiful and harmonious, with few undercuts, collapses and humps.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"149 ","pages":"Article 107902"},"PeriodicalIF":5.0000,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Laser Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030399222000597","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 3
Abstract
This study is to prevent droplet spatter in laser welding of galvanized sheets. Three-dimensional welding simulation model is also established and analyzed to reveal the relationship between keyhole oscillation and flow behavior. It is found major reason for droplet spatter is the impact force of the reflux and eddy of the metal pool toward the keyhole. Keyhole oscillates seriously and reflux impact causes energy exchange discontinuity, making the keyhole opening intermittent closed in traditional Gaussian laser source alone. While certain output proportion of coaxial annular and Gaussian laser source could considerably improve impact resistance on the reflux and suppress droplet spatter obviously. Weld appearance is relatively beautiful and harmonious, with few undercuts, collapses and humps.
期刊介绍：
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
