Sökning: "Laser beam welding"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Laser beam welding.

1. 1. Study of process parameters in laser beam welding of copper hairpins

   Kandidat-uppsats, Högskolan i Skövde/Institutionen för ingenjörsvetenskap

   Författare :Dan Lönn; David Spångberg; [2022]
   Nyckelord :Laser Welding; Hairpin Welding; Copper Laser Welding; Process Parameter; Multi-Physical Simulation; Computed Tomography Scan; Design of Experiment;

   Sammanfattning : This study had the purpose to further the use of industrial lasers in the manufacturing of hairpin electric motors by optimizing the process of contacting the hairpins. A problem with laser beam welding of copper is the porosity created in the process which can lead to increased resistance of the welded region along with degraded mechanical properties. LÄS MER

3. 2. Welding methods for electrical connections in battery systems

   Kandidat-uppsats, Uppsala universitet/Institutionen för teknikvetenskaper

   Författare :Alec Chamberlain; Harald Larsson; Louise Nilsson; Daniel Vasquez; Samir Schouri; Elin Myrsell; Sally Walin; [2019]
   Nyckelord :Resistance spot welding; laser beam welding; ultrasonic welding; battery cell; electrical performance; weld quality; cost analysis; automation degree; production yield;

   Sammanfattning : The demand for high energy battery assemblies is growing in sectors such as transportation. Alongwith it is the need for reliable, efficient and cost-effective ways to electrically connect the batteries toensure their performance. Battery cells are most often put into modules or packs when produced forelectrically driven vehicles. LÄS MER

4. 3. Using gallium nitride nanowires as STM probes

   Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Författare :Karolis Sulinskas; [2018]
   Nyckelord :STM; STS; Nanowire; GaN; InAs; Semiconductors; Physics and Astronomy;

   Sammanfattning : Gallium nitride (GaN) nanowires grown using catalyst-free metal organic vapor phase epitaxy were used as scanning tunneling microscope (STM) probes. The probes were prepared by placing a GaN nanowire on a tungsten STM probe using a nanomanipulator in a scanning electron microscope (SEM) and welding them together using an electron beam induced platinum deposition. LÄS MER

5. 4. A Study in How Welding Parameters Affect the Porosity in Laser Welded High Pressure Die Cast AM50 Magnesium Alloy

   Master-uppsats, KTH/Materialvetenskap

   Författare :Edwin Bergstedt; [2017]
   Nyckelord :Laser welding; AM50; Die Cast; Magnesium; Porosity;

   Sammanfattning : There are a need for reducing the weight of vehicles, one solution is to implement cast lightweight materials such as the high pressure die cast AM50 magnesium alloy. The weldability of this cast alloy is poor and to implement the use of the alloy commercially a welding process is needed that limits the porosity of the weld. LÄS MER

7. 5. Evaluation of an External Axis for Tool Manipulation in Robotized Laser Beam Welding

   Magister-uppsats, Högskolan Väst/Avdelningen för produktionssystem (PS)

   Författare :Civan Ulucan Dayan; [2017]
   Nyckelord :Welding applications; manipulation; twincat; external axis; osition accuracy;

   Sammanfattning : Laser beam welding applications are widely used in the industry. However, laser beam welding applications have a very small position tolerance to an offset. In this project, the offset is defined as the distance between the point, which the laser tool welds, and the point which laser tool should weld the weld joint. LÄS MER