{"title":"Real-time control of nugget formation in spot welds","authors":"Alan A. Richard, Alan C. Traub, Riccardo Vanzetti","doi":"10.1016/0303-1268(80)90163-7","DOIUrl":null,"url":null,"abstract":"<div><p>In the mass production of resistance spot welds for commercial use, several uncontrollable variables tend to produce welds of varying quality. We describe a microprocessing technique which is used with an infrared thermal sensing method to ensure weld uniformity. An optical fiber bundle “pipes” infrared radiation from a heated zone near the weld. A detection system provides a thermal signature of this zone, which reflects the progress of the heating inside the weld. A “standard” weld is made by trial and error, its thermal signature to serve as a model for all later welds of the same type. By controlling the welding-machine power in real time, the microprocessor ensure that all such welds will have the same thermal signature and, thus, the same quality.</p></div>","PeriodicalId":100495,"journal":{"name":"Euromicro Newsletter","volume":"6 5","pages":"Pages 296-303"},"PeriodicalIF":0.0000,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0303-1268(80)90163-7","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Euromicro Newsletter","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0303126880901637","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
In the mass production of resistance spot welds for commercial use, several uncontrollable variables tend to produce welds of varying quality. We describe a microprocessing technique which is used with an infrared thermal sensing method to ensure weld uniformity. An optical fiber bundle “pipes” infrared radiation from a heated zone near the weld. A detection system provides a thermal signature of this zone, which reflects the progress of the heating inside the weld. A “standard” weld is made by trial and error, its thermal signature to serve as a model for all later welds of the same type. By controlling the welding-machine power in real time, the microprocessor ensure that all such welds will have the same thermal signature and, thus, the same quality.