Dimensioning Sheet Metal Flat Pattern

Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness.

Dimensioning sheet metal flat pattern.

A part file can contain only one flat pattern. K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern. To convert a multi body. Calculator will calculate the necessary dimensions for the construction flat pattern segments lobsterback bend elbow tee piece frustum cone and truncated pipe truncated cone with an accessible vertex and triangulation method.

My boss dimensions from outside the flange walls and thinks. You can create a flat pattern from a sheet metal model and display the correct iproperties for a folded model and a flat pattern. I think this is the better way because you can acquire your cutting length without a flat pattern by adding the inside lengths fold allowance. You can use this sheet metal flat pattern calculator to calculate this increase in length.

Calculation flat pattern used as a template for cutting the pipe producing with wall thickness s 0. Derive each body to a unique part file and then activate each part to flatten. When producing drawings of sheet metal components i dimension from inside the flange walls. This is a common occurrence when manufacturers receive a sheet metal layout dimensioned in the flat pattern.

For example when sheet metal of length l is bend. After bending the total length a b is larger than length l. If you create multiple sheet metal bodies in a single part file the flat pattern command is disabled. These dimensions may seem helpful but after your manufacturer makes bend deductions based on their capabilities and other bending factors your dimensions will become unusable.