Likewise when you are trying to develop a flat pattern you will have to make a deduction from your desired part size to get the correct flat size. As this happens you gain a small amount of total length in your part. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. You can import text files and paste in ranges of cells.Understanding the Bend Allowance and consequently the Bend Deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated. You can also edit bend tables with a text editor or spreadsheet. You can access the integrated editor to create and edit bend tables in either text files or spreadsheets. Since aluminum deforms differently than steel, create a separate bend table file for each material type. Typically, a bend table file contains a bend table for each sheet thickness that is used. You can customize the sample spreadsheet by copying and editing tables.Ī bend table file can contain multiple bend tables as long as the tables are for different materials or thicknesses. Each cell in such a table requires measured sample pieces to ensure the highest accuracy.Ī sample bend table is available in a spreadsheet.

A useful bend table for a particular shop floor machine has a full-range of angles and bend radii.

If a part has only 90 degree bends of a single bend radius, there is no benefit in using a bend table versus adjusting the uniformly applied KFactor value. If a part uses only a single bend radius, a bend table requires only a single column. If a specific bend angle or bend radius is not in the table, the flat pattern analyzer interpolates between adjacent cells to determine a value.Ī bend table for a particular part needs rows for only the angles used within the part. A bend table contains bend deductions for the specified material thickness at specific bend radii and bend angles. When you select Bend Table as the unfolding method in the Sheet Metal Styles dialog box, the flat pattern analyzer uses a bend table to create the flat pattern. Because a bend table can take into account specific (nonlinear) equipment behavior, the piece parts produced from models using bend tables are closer in tolerance to the folded model.

You can generate flat patterns by unfolding sheet metal features using a uniformly applied linear KFactor, a bend table, or custom unfolding equation. When unfolding, if a bend radius or angle does not correspond to a specific entry, a process interpolates between adjacent values in the table. A bend table is a table of bend deductions arranged in rows and columns.Įach row in a bend table specifies a bend angle.

Bend deduction table