Hemmed Seam Sheet Metal

Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance.

Hemmed seam sheet metal. Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials. Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances. The edges of metal. Seaming on the other hand is a metalworking process that uses a similar process of rolling sheet metal over and onto itself except it uses a seam to join the two layers.

You ll often find seams on metal roofs. Basically they dont work. The video shows exemplarily how. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself.

Roller hemming is a mechanical joining technology well suitable to produce form locking linkages of large sheet structures. With hemming the edge of sheet metal is folded so that it becomes flush with the area onto which it s rolled. Rather the two layers of the folded sheet metal are joined using a seam. With seaming the edge of sheet metal is folded but it doesn t sit flush.

Am i missing something here or are manual work arounds required when. Hemming is a metalworking process where a sheet metal edge is mechanically bent to fit an uneven surface or simply roll over onto itself. And while hems or seams reinforce a sheet metal edge their main purpose is to improve appearance by hiding burrs and rough edges on metal back splashes and other sheet metal installations. This appears to be something to do with hems and seams being 180 degree bends.

Seams are commonly used in the food industry on canned goods on amusement park cars in metal roofing and in the automotive industry. In sheet metal hemming means to fold the metal back on itself.