SheetMetal Extrude

Description
The SheetMetal Extrude tool extends a sheet metal face.


 * [[Image:Involute-Gear example.png]]

Usage
To Extend the face:
 * 1) Start with a base plate or sheet, select a thin face representing the thickness of the metal sheet
 * 2) Click on the [[Image:SheetMetal_Extrude.svg|24px]] Extrude tool to extend the face.


 * The workbench does not have a tool to create a base plate, so you need to start your model with one of the following methods:
 * Method 1: Part_Box.svg Part Cube
 * Method 2: An extruded solid made with Part_Extrude.svg Part Extrude from either a:
 * Draft_Rectangle.svg Draft Rectangle or a
 * Draft_Wire.svg Draft Wire or a
 * Sketcher_NewSketch.svg Sketch
 * Method 3: PartDesign_Body.svg PartDesign Body containing either an
 * PartDesign_AdditiveBox.svg additive box or a
 * PartDesign_Pad.svg PartDesign Pad made from a Sketcher_NewSketch.svg Sketch.


 * If you start with a PartDesign_Body.svg PartDesign Body, you can mix Sheet Metal features with PartDesign features such as PartDesign_Pocket.svg pockets or PartDesign_Hole.svg holes.


 * In an extension operation, set.

Data

 * : Bend angle.
 * : Extends the wall on the left side.
 * : Extends the wall on the right side.
 * : Gap from the left side.
 * : Gap from the right side.
 * : Invert bend direction.
 * : Length of the wall.
 * : Bend miter angle on the left side.
 * : Bend miter angle on the right side.
 * : Bend radius.
 * : Rectangle or Round. Enabled only when a gap value is set.
 * : Relief depth. Enabled only when a gap value is set.
 * : Relief width. Enabled only when a gap value is set.
 * : K factor (also known as neutral factor) for the bend. Used to calculate bend allowance when unfolding.
 * : False (default) or True. If true, unfolds the bend.


 * : Pitch diameter (not changeable, is calculated automatically).


 * : With the helix angle β a helical gear is created (positive value → rotation direction right, negative value → rotation direction left).
 * : Default is 0,25 (see also the information in ).
 * : creates a double helix gear (see also the information in )
 * : Default is 0,00. This value is used to change the tooth height.
 * : Value of the gear width.
 * : Module is the ratio of the reference diameter of the gear divided by the number of teeth (see also the information in ).
 * : Default is 6, change of the involute profile. Changing the value can lead to unexpected results.
 * : If helix angle β is given and is enabled, gear parameters are internally recomputed for the rotated gear.
 * : Default is 0,00, generates a positive and negative profile shift (see also the information in ).
 * : generates a simplified display (without teeth and only a cylinder in pitch diameter).
 * : Number of teeth (see also the information in )
 * : changes the profil of the tooth root (see also the information in ).


 * : Default is 20 (see also the information in ).


 * : Default is 0,00. Backlash, also called lash or play, is the distance between the teeths at a gear pair.
 * : backlash decrease or  backlash increase (see also the information in ).

View
The parameter descriptions of the tab will be found in Property editor, further below at.

Limitations
Limitation are not known yet.

Scripting
Use the power of python to automate your gear modeling: