Twisted Extrude

In this Task 

A 2D polygonal shape will be extruded upwards using a 45º twist.

Associated Tasks 

Drawing a new sketch polygon for the twisted extrusion.

Using the Simple Extrude tool with a Draft Angle.

Before you Start 

View is set to Isometric South East.

Workplane is set to Plane by World.

Take Note 

Model is displayed in Wireframe, with Form Building Edges deactivated.

Twisted Extrude

Ribbon : Draw | Draw 3D | Twisted Extrude

Default Menu : Draw | 3D Object | 3D Profile Based | Twisted Extrude

Palette : 3D Model | 3D Object | Twisted Extrude

The Twisted Extrusion tool extrudes a profile perpendicular to the Workplane to create a solid object, allowing modeling features such as twisting and tapering to be created.This extrusion tool can create a bi-directional above/below Workplane extrusion and modeling features such as a twist or taper can be applied at any position along the length of the extrusion.

Place the Workplane on the top most surface, shown below. Use Workplane by Facet to do this.

Switch to Plan view, then using the center of the original construction circle, insert an 8 sided (vertex mode) polygon using the vertex point of the extrusion to define the radius, shown below.

Right click onto the Twisted Extrude tool and select the Twisted Extrude Shape page.

Input the values shown below to create the twisted extrusion:

Setting the Twist shape

Turn the view to an isometric view, then left click onto the Twisted Extrusion tool. Select the newly drawn polygon profile. Extrude upwards to a height of 20.

The result is shown below.

Place a final polygonal shape on the top most profile, to the exact size as the top edge of the extruded shape. Remember to place the Workplane on the top surface and use the center of the original construction circle as the center of the Polygon.

Select the Simple Extrude tool and right click to change the draft angle to -80. Extrude the new profile upwards by 20 so that the result is similar to the illustrations below.

Showing the twisted extrusions with different draft angles