Sheet Metal Hem

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

Sheet metal hem. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. A combination of two hems can create strong. In sheet metal hems are used to create folds in sheet metal in order to stiffen edges and create an edge safe to touch. Hems have drawbacks however.

With plated steel parts the interior of the hem can be very difficult to cover for corrosion control. Hems are commonly used to hide imperfections and provide a generally safer edge to handle. This can be a serious problem because the inside of the hem is easy to wet but challenging to dry. Typical parts for this type of assembly are hoods doors trunk lids and fenders.

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. 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. Hems can be useful as a way to stiffen a sheet metal panel. Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances.

Abn sheet metal hand seamer 3 inch straight jaw manual metal bender tool sheet metal bending pliers flattening tool 4 5 out of 5 stars 144 27 89 27. In sheet metal hemming means to fold the metal back on itself. Hems are most often used to remove a sharp untreated edge and make it safe for handling.