There is no standard ratio in FSW process, but i think it might be existed a logic ratio between these 4 parameters for each material.
for instance, depending on the pip outer diameter and its thickness, which are making limitation in diameter of the shoulder if extend the shoulder’s diameter to provide enough temperature due to complete plunging, extra flash will occurred.
To prevent flashes to get an optimum quality of weld, less influx will be logical decision which lead to insufficient touch and friction between the shoulder and pip.
this is a challenging!
You are correct that there is no standard ratio for shoulder diameter, pin diameter, workpiece thickness, and outer pipe diameter in rotational friction stir welding (RFSW). However, some general guidelines and principles can be followed to optimize these shoulder diameters for a specific material and application. The shoulder primarily generates heat through friction and contains the material flow within the weld region. The shoulder diameter should be large enough to provide sufficient frictional heat and prevent material escape. However, it is not so large that it causes excessive flash or affects the tool's ability to traverse the workpiece.
The resulting flash was studied in our below studies which can help you:
Raheem K. Al-Sabur and Ahmad K. Jassim, Friction Stir Spot Welding Applied to Weld Dissimilar Metals of AA1100 Al-alloy and C11000 Copper, 2018 IOP Conf. Ser.: Mater. Sci. Eng. 455 012087. doi:10.1088/1757-899X/455/1/012087
A K. Jassim, Raheem Al-Sabur, Studying the Possibility to Weld AA1100 Aluminum Alloy by Friction Stir Spot Welding, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Vol:11, No:9, 2017
Dear Dr. R. Al-Saburi
Many thanks for your comments. I will check the article and back to you.
- Badges
- Science topic
- Similar topics
- Biological Science
- Physiology
- Physiological Processes
- Stress