Laser welding of cylindrical parts
Närhi-Ratkovskaia, Olga (2011)
Närhi-Ratkovskaia, Olga
Hämeen ammattikorkeakoulu
2011
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2011102614031
https://urn.fi/URN:NBN:fi:amk-2011102614031
Tiivistelmä
The purpose of this paper is to conduct the laser welding work of the cylindrical parts, particularly fuel filters, according to the safety instructions. The welding was followed by the additional test for a gas resistance of filters. The topic was commissioned by the company Laserplus Oy, located in Hämeenlinna.
The aim of the project on laser welding of filters was to find out optimum parameters for the company’s welding. Optimum parameters include the minimum laser power with optimum speed and maximum allowed focus distance from the surface of the welded part that will be appropriate for the company.
Before tests conducting the theory on laser, laser welding, and laser techniques were studied.
The experiment was done in five main steps:
-Preparing the equipment for the laser welding and checking the rotating speeds;
-Weld trial pieces;
-Making samples and microscopic examination of trial laser welding pieces;
-Filters welding and testing them for the leakage;
-Making samples and microscopic examination of laser welded filters.
During the experiment the main mechanical laboratory of HAMK, the robotic cell and the chemistry laboratory was used. Filters were received from the company and the material of filters was stainless steel. It was decided to use an ytterbium fiber laser YLR-1000 for welding.
The results of this work were 12 welded filters that were all tested under the water for the gas resistance and three of them were examined under the microscope. The conclusion is the rotational speed of 5,5 m/min, which was stated by the company, is good speed for the power of 600 W and also 1000 W, the maximum focus distance from the surface can be +2 mm, for longer distances the welding was not good enough.
The aim of the project on laser welding of filters was to find out optimum parameters for the company’s welding. Optimum parameters include the minimum laser power with optimum speed and maximum allowed focus distance from the surface of the welded part that will be appropriate for the company.
Before tests conducting the theory on laser, laser welding, and laser techniques were studied.
The experiment was done in five main steps:
-Preparing the equipment for the laser welding and checking the rotating speeds;
-Weld trial pieces;
-Making samples and microscopic examination of trial laser welding pieces;
-Filters welding and testing them for the leakage;
-Making samples and microscopic examination of laser welded filters.
During the experiment the main mechanical laboratory of HAMK, the robotic cell and the chemistry laboratory was used. Filters were received from the company and the material of filters was stainless steel. It was decided to use an ytterbium fiber laser YLR-1000 for welding.
The results of this work were 12 welded filters that were all tested under the water for the gas resistance and three of them were examined under the microscope. The conclusion is the rotational speed of 5,5 m/min, which was stated by the company, is good speed for the power of 600 W and also 1000 W, the maximum focus distance from the surface can be +2 mm, for longer distances the welding was not good enough.