Hemming Process Sheet Metal

During this process the edge of sheet metal is folded over.

Hemming process sheet metal.

Sheet metal is available in a variety of gauges. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Typical parts for this type of assembly are hoods doors trunk lids and fenders. Roller hemming combines standard industrial robots equipped with a standard roller hemming head that follows the contour of the outer flanges of a sheet metal component optimally hemming it over an inner panel which is precisely nested in a die.

The hem is primarily used for reinforcement safety and edge appearance figure 4. Seams are commonly used in the food industry on canned goods on amusement park cars in metal roofing and in the automotive industry. 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. Or the hemming process simulation and validation are taken care of by specialist biw teams using autoform s data exchange capabilities.

In the hemming process the bend is started with an acute tool set and then flattened in flattening dies figure 6. Hemming is a sheet metal forming process in which sheets are joined by bending it to 180. The process uses traditional hydraulically operated stamping presses to hem closure parts and being the last forming process in stamping it largely determines the external quality of such automotive parts as doors hood and trunk lid. The two newly formed layers then lie flush with each other.

A seam is a method of joining two pieces of sheet metal together figure 5. 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. These new hemming process analysis capabilities may be harnessed by viewing the hemming validation as an extension of the regular stamping process simulation placing it into the hands of a specialist already familiar with the simulation of sheet metal forming processes.

Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials. Our flexible process offers numerous advantages over traditional techniques including reduced capital investment costs with superior dimensional quality. 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 presses are widely used in automotive manufacturing for hemming of sheet metal body components.

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