What type of roll is used for turning edges to receive stiff wire?

• A. Beading rolls
• B. Wiring rolls
• C. Turning rolls
• D. Flanging dies

Answer: (C)

The correct answer is turning rolls. Turning rolls are specifically designed to form a turn or edge on metal sheets or plates, which is crucial when preparing edges to receive stiff wire. These rolls help create an appropriate angle and contour for the edge, ensuring that the stiff wire can be securely attached or fitted.

Turning rolls are commonly used in manufacturing processes where precise edge formations are necessary, such as in the aerospace industry for structural components. This technique helps provide stronger joints and better overall durability of the assembly, which is essential in aviation structural mechanics.

In contrast, beading rolls are primarily used for creating beaded edges rather than turning edges, wiring rolls are focused on preparing wire to fit into grooves or holes, and flanging dies are designed for producing flanges and might not create the specific type of edge required for receiving stiff wire. Understanding the specific functions of these tools helps choose the right one for the job, ensuring efficiency and effectiveness in aircraft structure fabrication.