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Multipurpose innovative nozzle design for wire-feed laser metal deposition

Kafle, Suman (2018)

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Diplomityö

Kafle, Suman
2018

School of Energy Systems, Konetekniikka

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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2018120749977

Tiivistelmä

The objective of this research work is to design innovative nozzle for wire-feed laser metal deposition with integration of wire feeding nozzle, smoke suction technique and shielding gas supply all in single nozzle head. The design considers the benefit provided by wire-feed laser metal deposition compared to other AM methods.
The work was commissioned by Lappeenranta University of Technology. All the data related to design were taken from previous research works and know-how of current LMD process. Various designs were explored with design-to-use concept in mind. Progressive iterative design approach was adopted to find suitable shielding gas delivery angle and wire feeding angle along with uniform distribution of shielding gas during the process. Process monitoring sensor channel was integrated paving a way for further in-situ monitoring integration in future. Cooling of the nozzle itself was implemented with the addition of water-cooling chamber around the nozzle. Removal of process smoke and metal plumes was achieved with pressure air and suction set up integrated in nozzle right above the process area providing an opportunity to replace cross-jet feature currently used during laser processing applications.
Final design is an innovative nozzle which can be used for wire feed LMD process with improved direction independency and has integrated feature of shielding gas supply, cross-jet, shielding gas supply, process monitoring window and wire feeder nozzle.
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PL 20
53851 Lappeenranta
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LUT-yliopisto
PL 20
53851 Lappeenranta
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