Hemming In Sheet Metal

Hemming is a metalworking process where a sheet metal edge is mechanically bent to fit an uneven surface or simply roll over onto itself.

Hemming in sheet metal. Seams are commonly used in the food industry on canned goods on amusement park cars in metal roofing and in the automotive industry. Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances. Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials. In sheet metal hemming means to fold the metal back on itself.

Hemming is a metalworking process that involves rolling the edge of sheet metal over and onto itself essentially creating an area of two layers. When working with a brake press hems are always created in a two step process. The two newly formed layers then lie flush with each other. In car part production hemming is used in assembly as a secondary operation after deep drawing trimming and flanging operations to join two sheet metal parts outer and inner together.

Automotive body panels and automotive parts such as deck lids trunk lids doors hoods and tailgates are formed by hemming process. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. In this process usually a sheet is bent with the help of inner sheet in three different stages. During this process the edge of sheet metal is folded over.

Sheet metal is available in a variety of gauges. 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.