Hemming In Sheet Metal

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

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. In sheet metal hemming means to fold the metal back on itself. The two newly formed layers then lie flush with each other. Automotive body panels and automotive parts such as deck lids trunk lids doors hoods and tailgates are formed by hemming process.

Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance. Sheet metal is available in a variety of gauges. During this process the edge of sheet metal is folded over. Seams are commonly used in the food industry on canned goods on amusement park cars in metal roofing and in the automotive industry.

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. 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. Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances.

Normally hemming operations are used to connect parts together to improve the appearance of a part and to reinforce part edges. Hemming is a metalworking process that involves rolling the edge of sheet metal over and onto itself essentially creating an area of two layers.