What process involves folding the edge to produce a smooth edge and add strength?

What process involves folding the edge to produce a smooth edge and add strength?

• A. Beading
• B. Hemming
• C. Flange
• D. Gasket

Answer: (B)

Hemming is the process of folding the edge of the sheet metal back onto itself to create a smooth, finished edge and to add strength. This folding hides burrs, reduces sharpness, and helps stiffen the edge, improving durability where the edge meets another part or is handled. Beading, by contrast, adds stiffness with a raised ridge but doesn’t smooth the edge; flanging creates a mounting lip along the edge; and a gasket is a sealing material, not an edge finish. So hemming best delivers both a smooth edge and added strength.

Hemming is the process of folding the edge of the sheet metal back onto itself to create a smooth, finished edge and to add strength. This folding hides burrs, reduces sharpness, and helps stiffen the edge, improving durability where the edge meets another part or is handled. Beading, by contrast, adds stiffness with a raised ridge but doesn’t smooth the edge; flanging creates a mounting lip along the edge; and a gasket is a sealing material, not an edge finish. So hemming best delivers both a smooth edge and added strength.