5. Step bend

Exercise 5: Suction hood 

 

In this exercise you will learn to

• Modeling a part using cross sections and lofting. Thus creating the main shape of the desired hood. 

• To create a sheet metal part with the tangential offset function.

• To create the Step bends that are required for the Unbend (Flatten sheet projection)

• To create a 3D unbend.

Functions to be used:

• Sketching + operation: Cross Section
  

• Lofting > Boss (Skinning)
  

• Tangential offset.
  

• Step Bend

• Unbend

Create a new part

• File > New > Part.
  

  • Enter the label (which is also the name of the model and by default will be the name of the drawing).

  • Enter the archive information by clicking Arc.Data.

  • Select the project where the model will be saved.

  • OK.

Create the first cross section

• New Sketch > To horizontal (XY) plane.
  

Sketch the shape

• The function: Two point rectangle.

  • Sketch a rectangle symmetrically about the vertical axis of the central cross.

• Add the Conincident constraint between the upper horizontal line and the central cross.

• Add the Symmetry constrain between the vertical lines and the center cross.

• Add the Distance constraints.

  • 800 and the formula: WIDTH.

  • 400 and the formula: DEPTH.

• Click the two points in the bottom corner.

• The function: Round.

  • 150 and the formula: R1.

• 

Operation

• Cross Section.

Create the second cross section

• Click  the first cross section.

• Right-click function: New Sketch > Parallel.

  • Enter the value: 400 and the formula: HEIGHT.

Sketch the shape

• The function: Two point rectangle.

  •  Sketch a rectangle symmetrically about the vertical axis of the central cross.

• Add the Conincident constraint between the upper horizontal line and old line, if needed.
  

• Add the Symmetry constrain between the vertical lines and the center cross.

• Add the Distance constraints.

  •  400 and the formula: WIDTH2.

  • 200 and the formula: DEPTH2.

• Click the two points in the bottom corner.

• The function: Round.

  • 30 and the formula: R2.

• 

Operation

• Cross Section.

Use cross sections to create a part

• Click both cross sections (Remember Ctrl key with later cross section).

• The function: Lofting > Boss.

  • The Loft dialog opens.

• Accept defaults.

• OK.

Create step bendings

Step bends must be created on each surface to be separately.

• Click the face, shown in the figure.

• Right-click function: Step Bend.
  

  • Number: 7 and the formula: PCS.

  • Radius: 4 and formula: RADIUS

• OK.

• Click the face, shown in the figure.

• Right-click function: Step Bend.

  • Number: 7 and the formula: PCS.

  • Radius: 4 and formula: RADIUS.

• OK.

Create a sheet metal part

• Choose one of the oblique faces.

• Right-click function: Tangential Offset.

  • Value (Sheet metal thickness): 1.

  • Click: In (the direction the material is added relative to the selected surface.)

• OK.

Create a 3D unbend

• Activate the ribbon of Sheet metal part.

• The function: Unbend.

• Accept the face selected by the program or select a face.

Create rebend

• The function: Rebend.

• Note that if no features have been added to the unfolded part, the Rebend function removes the Flatten Sheet feature.

Save the model

• File > Save or click or press

Further processing of the model (These are presented in Exercise 5 "Drawing on model")

You can add a material item to the model with the right-click function Item Data.

• These will also appear in the parts list of the model drawing.

You can create a drawing for the model:

• In the feature tree, select Drawings.

• Right-click function: New Drawing.

Download the hood model (VX_SMD7.vxz) here.

Video

Duration 1m 50s

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