Hemming In Sheet Metal

Hemming is a metalworking process that involves rolling the edge of sheet metal over and onto itself essentially creating an area of two layers.

Hemming in sheet metal.

Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials. 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. Hemming is a sheet metal forming process in which sheets are joined by bending it to 180.

Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance. In this process usually a sheet is bent with the help of inner sheet in three different stages. In sheet metal hemming means to fold the metal back on itself. When working with a brake press hems are always created in a two step process.

Sheet metal is available in a variety of gauges. Hemming is a metalworking process where a sheet metal edge is mechanically bent to fit an uneven surface or simply roll over onto itself. Normally hemming operations are used to connect parts together to improve the appearance of a part and to reinforce part edges. During this process the edge of sheet metal is folded over.

Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled 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.