Sheet Metal Flat Pattern Layout

Keep default values in calculator as zero.

Sheet metal flat pattern layout.

Bend lines must be determined to develop a flat pattern for sheet metal forming. Therefore it is important to have the value correct in cad software. Here are the steps to be followed to calculate sheet metal flat length. Before a sheet metal part is formed make a flat pattern to show how much material is required in the bend areas at what point the sheet must be inserted into the forming tool or where bend lines are located.

The k factor is used to calculate flat patterns because it is related to how much material is stretched during bending. Use k factor calculator to calculate k factor values. Enter flange length internal radius and thickness values. However to match the other dimensions that are included it would require your manufacturer to work with incorrect or unachievable sheet metal forming factors.

The flat pattern drawing doesn t always list these factors. Value of bend deduction and flat pattern are shown in result section. Importance of the k factor in sheet metal design. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage.

View the cone instructions below to learn how to manually layout the flat pattern for a truncated cone in single or multiple gore sections. The layout may either be done on the material to be used or on a piece of paper. It allows you to determine either the size of raw material needed or the number of gore sections to fit on your available material.