Cross Breaking Sheet Metal

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Cross breaking sheet metal.

The functionality seems to be there in the solidworks cross break command on the sheet metal toolbar but upon inspection the cross break it inserts is merely cosmetic. In most applications this will be sufficient since the distortion on the actual component will be minimal. A cross break in sheet metal is when multiple obtuse bend angles of approximately 170 are made across a flat section thin metal. So on the same page they mention.

We used the following equipment to produce this video. A second bend is made across this initial one leaving an x impression on the sheet. The crossing ridges stiffen the face of the metal and help prevent is from buckling under a load. Cross breaks in hvac or duct work design cross breaks are used to stiffen sheet metal.

The cross break is not a geometric entity and does not alter the geometry of the part. Cross breaks are most commonly in an x shape forming a slight pyramid shape in the metal without overly distorting it. To form the operator marks the bend line on the sheet as a guide then lines it up with punch tip and performs a shallow bend. Cross braking is a technique performed using a press brake.