An investigation of the effects of autobrazer parameter variations on the quality of return bend joints

Autor:	B Thrift, A S Penaherrera, Emmanuel I. Agba, E W Jones
Rok vydání:	1997
Předmět:	Leak Materials science business.industry Mechanical Engineering Process (computing) Mechanical engineering Structural engineering Temperature measurement Industrial and Manufacturing Engineering Thermocouple Electromagnetic coil Heat exchanger Brazing Process control business
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 211:443-450
ISSN:	2041-2975 0954-4054
DOI:	10.1243/0954405971516400
Popis:	A temperature monitor that can record brazing temperatures inside an autobrazer for process control and qualification was developed. The monitor was made of a heat exchanger coil instrumented with multiple thermocouples at statistically selected return bend joints that had a high or low probability of leaking. The brazing temperatures recorded at the selected return bends were compared with control temperature profiles for high-quality brazed joints. The results clearly accentuated the disparities in the heating rates, the cooling rates and the peak bonding temperatures between the non-leaking joints and the leaking joints. The autobrazer process parameters were then correlated with a number of leaks and leak locations to determine how to configure the autobrazer and control the process variables to ensure similar brazing conditions at all joints. By so doing, the repeatability of the brazing process and the production of high-quality joints was guaranteed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3959d4c211911a8a62f60f638b2a4818 https://doi.org/10.1243/0954405971516400 Zobrazit plný text záznamu