Advanced Catia sheetmetal

This tutorial provides sheetmetal introduction and toolbars available with explanation.

  1. Step 1: Contents To be discussed

     1.Introduction Sheet metal Introduction

     2.Primary walls and secondary walls

     3.Sheetmetal parameters

     4.K factor and Y-factor

     5.Various sheet metal tools

     6.Creating sheet metal components

  2. Step 2: Parameters

    Sheet metal depends on certain parameters


     2.Bend Radius

     3.Bend angle

  3. Step 3: Bend Allowance Formula

    L= ᴫ/2 * R + (Y*T)θ/90


    L= Developed length

    R=Inside Radius


    Θ=Bend angle


  4. Step 4: Y-factor

    Y=K* ᴫ/2

    Default value will be 0.5

    In CATIA k-factor value is around 0.4005

  5. Step 5: Mouse Controls

  6. Step 6: Entering Sheetmetal Parameter

  7. Step 7: Default Bend Allowance value

    K Factor

    Physically, the neutral fiber represents the limit between the material compressed area inside the bend and the extended area outside the bend. Ideally, it is represented by an arc located inside the thickness and centered on the bend axis.

    This formula can be deactivated or modified by right-clicking in the K factor field and choosing an option from the contextual menu. It can be reactivated by clicking the Apply DIN button. Moreover, the limit values can also be modified. 

  8. Step 8: Various Bend Extremities

  9. Step 9: Various Bend Extremities

    Ø Minimum with no relief (default option): the bend corresponds to the common area of the supporting walls along the bend axis, and shows no relief.

    Ø Square relief: the bend corresponds to the common area of the supporting walls along the bend axis, and a square relief is added to the bend extremity. The L1 and L2 parameters can be modified if needed.

    Ø Round relief: the bend corresponds to the common area of the supporting walls along the bend axis, and a round relief is added to the bend extremity. The L1 and L2 parameters can be modified if needed

    Ø Linear: the unfolded bend is split by two planes going through the corresponding limit points (obtained by projection of the bend axis onto the edges of the supporting walls).

    Ø Tangent: the edges of the bend are tangent to the edges of the supporting walls.

    Ø Maximum: the bend is calculated between the furthest opposite edges of the supporting walls.

    New Functionalities 

    Local fold and unfold of bends – We can now fold planar faces, as well as unfold cylindrical or conical faces in folded views, without changing the flattened view.

    Overlap detection - A new command now lets you check overlapping areas on flat views.

    Mirror - We can now mirror a given sheet metal feature. This duplicates a sheet metal feature symmetrically with respect to a plane.

    Hybrid Design - We can now create wireframe and surface features within the same solid body which impacts the behavior of overlapping and local fold/unfold of bends.

  10. Step 10: Enhanced Functionalities


    Additional possibilities are now available when creating a cutout: We can choose a direction for the cutout that is different from, or equal to, the normal direction. Additionally, the extrusion can now be of lesser length than the thickness. We can also now specify several supports for the cutout, instead of just one previously.

    Stamp recognition

    Stamps can now be recognized as Generative Sheetmetal Design stamps.

    Half-pierce for stamps

    The new half pierce feature is available for circular stamps, curve stamps and surface stamps.

    New options for surface stamps

    Additional possibilities are now available when creating surface stamps. We can now define a stamp based on profile containing a punch and die sketch, a 3D curve sketch or a sketch with several inner contours. 

    Flange pattern

    We can now create a pattern from a flange on rectangular, circular or user-defined patterns.


    Selecting a ruled surface is now possible when creating a hopper.

    Document chooser integration

    We can now customize the document environment (Tools > Options > General > Document tab) in order to select documents or paths using various interfaces (folder, Enovia, and so on). The interface can be customized for a folder or DLName path selection interface

  11. Step 11: Creating Walls

  12. Step 12: Rolled Walls

    Surfacic hoppers are defined by a ruled surface selected by the user or created thanks to the loft command.

    Defining a surfacic hopper via a loft is highly recommended since it allows detection of all canonical segments. The two sketches used to define the loft can be on parallel or non parallel planes.

    The reference wire and the invariant point, used to unfold the hopper, must lie on the surface, as well as the tear wire. 

  13. Step 13: Different Workbenches

  14. Step 14:

  15. Step 15: