Hemming Process Sheet Metal

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Hemming process sheet metal.

Automotive body panels and automotive parts such as deck lids trunk lids doors hoods and tailgates are formed by hemming process. When working with a brake press hems are always created in a two step process. Hemming presses are widely used in automotive manufacturing for hemming of sheet metal body components. Complete flange and snap studies are conducted in 3d so potential challenges are overcome in the virtual space prior to die development.

Hemming is a sheet metal forming process in which sheets are joined by bending it usually to 180. In a low volume production hemming process illustrated in fig. Rapid sheet metal has created a series of video sheet metal design technical tips for design engineers. In open hemming sheet metal is folded over but has a small air pocket separating it from the underlying layer.

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. The hem is primarily used for reinforcement safety and edge appearance figure 4. Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance. Typical parts for this type of assembly are hoods doors trunk lids and fenders.

Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances. A seam is a method of joining two pieces of sheet metal together figure 5. Hemming and seaming hemming and seaming are basically the same process. Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials.

The idea was conceived by the engineers at rapid shee. With hemming the edge of sheet metal. Seaming on the other hand is a metalworking process that uses a similar process of rolling sheet metal over and onto itself except it uses a seam to join the two layers. In sheet metal hemming means to fold the metal back on itself.

Hemming method for sheet metal member jp3886386b2 en 2002 01 30. Our dedicated team of sheet metal hemming experts gets involved in the early stages of product development in order to ensure optimum results. In the hemming process the bend is started with an acute tool set and then flattened in flattening dies figure 6.