Abstract
The article considers the force applied to the welding tool during friction stir welding of commercially pure copper M1 and aluminum AD1. A technique for measuring the axial force applied to the tool is presented. The results of the study show that the speed of rotation and feed (welding) of the tool affect the value of the axial force. While maintaining a constant feed rate of the tool, the axial force increases as the speed of its rotation decreases. The maximum value of the force was 28.75 kN at a rotation speed ω= 800 rpm. Increasing the tool speed to 900 and 1000 rpm leads to a decrease in axial force by 15% and 40% of the maximum that occurs at 800 rpm. At a fixed tool speed and increasing welding speed, the change in axial force is negligible.
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