Sheet Metal Bend Relief Size

When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb.

Sheet metal bend relief size. One benefit of a bend relief is that it makes the part easier to produce. Extrude hole size position guidelines creating an extruded hole using a punching process requires extreme pressure force. When is a bend relief required. Select a hard edge bend face flange face or 3d solid entire model.

This option is straight forward. Assume the thickness is 1 mm a ratio to thickness equals to 4 will create a 4 mm per side square relief fig 5 for the obround relief the ratio to thickness options works in a similar manner. Choose create relief in the sheet metal menu. For a 3 width ratio when the part is 1 mm in thickness the width of the slot will be 3 mm.

The bigger the bend relief the easier it is to align over the end of the tooling. At minimum the size of the bend relief should equal the material thickness plus the inside bend radius. Click the create relief tool button on the sheet metal ribbon tab. Bend relief is provided at the end of bending edge in sheet metal design to avoid any crack tearing in the corner.

Bend radii minimum bend sizes it is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Relief height is generally kept greater than two times of sheet thickness plus bend radius. Use this document to choose values that are both manufacturable and meet your needs. Enter relief size by bend radius ratio or force bend reliefs auto auto.

For example if you make a partial flange as above using all the defaults the software makes relief cuts at the end of the bends as shown to the right. Not every bend requires a bend relief. Synchronous sheet metal is pretty cool even cooler than just normal synchronous modeling if you ll excuse that word. For example if you were bending a piece of sheet metal perfectly in half with no cutouts you could create the bend accurately without including a bend relief.

Select an item see the note below. You should also incorporate the use of bend relief cuts with a thickness of at least the thickness of the material with strong preference for bend relief cuts of a thickness equal to material thickness plus 1 64 inches. First utilize minimal bend radius of internal bend radius equal to material thickness. If it is ok for the metal to rip the minimum bend relief is zero.

Type smreliefcreate in the command bar.