Measurement of Cooling Time in Welding
Khatri, Rajesh (2020)
Khatri, Rajesh
2020
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2020071119534
https://urn.fi/URN:NBN:fi:amk-2020071119534
Tiivistelmä
The purpose of the thesis was to develop a simplified method to evaluate the cooling time of Heat Affected Zone (HAZ) based on surface temperature measurement (infrared camera) to avoid using thermocouples. This thesis work was commissioned by HAMK Tech, one of the research units of Häme University of Applied Sciences.
The thesis project started with welding in the HAMK laboratory in Riihimäki where welding was carried out using Universal Robot (UR). The Robot was used for precise and uniform welding. A thermal camera was used to measure the surface temperature and thermocouples were used to measure the inner temperature in HAZ. Thus, obtained data was recorded analyzed and simulated in ANSYS to eliminate the use of thermocouples. Welding simulation in ANSYS was carried out with the same boundary conditions, materials properties, and geometry as in the real experiments. This research project simplified the overall process of evaluation of cooling time in Heat Affected Zone (HAZ).
This thesis describes all the procedures carried out during the research project to obtain the solution and it provides co-relation which can be used in the welding process to evaluate the cooling time. Cooling time in the heat-affected zone during welding can be measured without using thermocouples with the help of this thesis work which will save a significant amount of time and effort. This thesis work is useful and can be used as a reference while evaluating cooling time during welding in the future and it serves as a document for further research on heat measurement in welding.
The thesis project started with welding in the HAMK laboratory in Riihimäki where welding was carried out using Universal Robot (UR). The Robot was used for precise and uniform welding. A thermal camera was used to measure the surface temperature and thermocouples were used to measure the inner temperature in HAZ. Thus, obtained data was recorded analyzed and simulated in ANSYS to eliminate the use of thermocouples. Welding simulation in ANSYS was carried out with the same boundary conditions, materials properties, and geometry as in the real experiments. This research project simplified the overall process of evaluation of cooling time in Heat Affected Zone (HAZ).
This thesis describes all the procedures carried out during the research project to obtain the solution and it provides co-relation which can be used in the welding process to evaluate the cooling time. Cooling time in the heat-affected zone during welding can be measured without using thermocouples with the help of this thesis work which will save a significant amount of time and effort. This thesis work is useful and can be used as a reference while evaluating cooling time during welding in the future and it serves as a document for further research on heat measurement in welding.