What is Friction stir welding
Friction stir welding utilizes friction heat and plastic deformation heat as welding heat sources.
The friction stir welding process is a process in which a cylindrical or other shaped welding pin is inserted into the joint of the workpiece, and through the high-speed rotation of the welding head, it rubs against the material of the welded workpiece, thereby causing the temperature of the connecting material to rise and soften. Simultaneously stir and friction the materials to complete the welding.
During the welding process, the workpiece should be rigidly fixed on the back cushion, and the welding head should rotate at high speed while moving relative to the workpiece along the seam. The protruding section of the welding head extends into the interior of the material for friction and stirring. The shoulder of the welding head generates heat by friction with the surface of the workpiece, and is used to prevent the overflow of plastic state materials. At the same time, it can also play a role in removing surface oxide films.
FSW has several advantages in the aluminum industry.
Friction welding can be completed faster. Friction welding has higher efficiency. It can be nearly 100 times faster than conventional fusion welding. This means less processing time and lower tool costs
2. More environmentally friendly. Due to its working mode, there are no pollutants or smoke emitted into the air. Friction welding can also reduce carbon dioxide emissions. This is the ideal solution for environmentally friendly welding
3. Security. The metal used in friction welding is forged rather than melted, resulting in fewer defects such as cracks and pores. Moreover, since welding is machine controlled, friction welding can provide consistency that other types of welding cannot guarantee
4.The welds produced by FSW have excellent mechanical properties, such as high strength and fatigue resistance. This makes it particularly suitable for connecting thin aluminum plates commonly used in the aerospace and automotive industries.
5. High repeatability and reliability. FSW is a relatively simple and easy to automate process, which makes it particularly useful for large-scale production. This makes it an ideal choice for the aluminum industry, as it requires high-quality and large-scale production to meet many applications.
In summary, friction stir welding is often used for manufacturing water cold plates due to its advantages.
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