DisegnoPezzo IngranaggioEvolvente
DisegnoPezzo IngranaggioEvolvente |
Posizione nel menu |
---|
DisegnoPezzo → Ingranaggio Evolvente... |
Ambiente |
DisegnoPezzo |
Avvio veloce |
Nessuno |
Introdotto nella versione |
- |
Vedere anche |
Nessuno |
Description
Descrizione
Questo strumento consente di creare un profilo 2D dell'evolvente di un ingranaggio. Questo profilo 2D è completamente parametrico, e può essere estruso con la funzione DisegnoPezzo Pad di PartDesign.
Per informazioni più dettagliate consultare le voci di Wikipedia per: Gear e Involute Gear
For more detailed information see Wikipedia's entries for: Gear and Involute Gear
Usage
Create the profile
Utilizzo
Create a spur gear
- Select the gear profile in the tree.
- Press the PartDesign Pad button.
- Set the pad's DatiLength to the desired face width of the gear.
- Click OK
Create a helical gear
- Select the gear profile in the tree.
- Press the PartDesign AdditiveHelix button.
- Choose as Axis the normal of the gear profile, that is Normal sketch axis introduced in version 0.20. (In earlier versions the Base Z axis can be used as long as the profile's plane has not been altered.)
- Choose a Height-Turns mode.
- Set the DatiHeight to the desired face width of the gear.
- To set the desired helical angle an Expressions for the DatiTurns is required.
- Click the blue icon at the right of the input field.
- Enter the following formula:
Height * tan(25°) / (InvoluteGear.NumberOfTeeth * InvoluteGear.Modules * pi)
, where25°
is an example for the desired helical angle (also known as beta-value) andInvoluteGear
is the DatiName of the profile. - Click OK to close the formula editor.
- Click OK to close the task panel.
Hint: To make the helical angle an accessible parameter, use a dynamic property:
- Select the profile.
- In the Property editor activate the Show all option in the context menu.
- Again in the context menu, select Add Property. Note: this entry is only available when Show all is active.
- In the Add Property dialog:
- Choose
App::PropertyAngle
as Type. - Set
Gear
as Group. - Set
HelicalAngle
as Name (without a space). - Click OK
- Choose
- Now a new property DatiHelical Angle (space added automatically), with an initial value of
0.0°
, becomes available. - Assign the desired helical angle to the new property.
- In the formula of the DatiTurns property of the AdditiveHelix, you can now reference
InvoluteGear.HelicalAngle
instead of the hard coded value of e.g.25°
; again assumingInvoluteGear
is the DatiName of the profile.
Properties
- External gear: True o false
- Alta precisione: True o False
- Modulo: Diametro diviso per il numero di denti.
- Numero di denti: Impostare il numero di denti.
- Angolo di pressione: Angolo acuto tra la retta di pressione e la normale alla congiungente i centri degli ingranaggi. Di default è 20 gradi. (Altre info)
Tutorials
Correlazioni
PartDesign
- Structure tools: Part, Group
- Helper tools: Create body, Create sketch, Edit sketch, Map sketch to face
- Modeling tools
- Datum tools: Create a datum point, Create a datum line, Create a datum plane, Create a local coordinate system, Create a shape binder, Create a sub-object(s) shape binder, Create a clone
- Additive tools: Pad, Revolution, Additive loft, Additive pipe, Additive helix, Additive box, Additive cylinder, Additive sphere, Additive cone, Additive ellipsoid, Additive torus, Additive prism, Additive wedge
- Subtractive tools: Pocket, Hole, Groove, Subtractive loft, Subtractive pipe, Subtractive helix, Subtractive box, Subtractive cylinder, Subtractive sphere, Subtractive cone, Subtractive ellipsoid, Subtractive torus, Subtractive prism, Subtractive wedge
- Transformation tools: Mirrored, Linear Pattern, Polar Pattern, Create MultiTransform, Scaled
- Dress-up tools: Fillet, Chamfer, Draft, Thickness
- Boolean: Boolean operation
- Extras: Migrate, Sprocket, Involute gear, Shaft design wizard
- Context menu: Set tip, Move object to other body, Move object after other object, Appearance, Set colors
User documentation
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Start, Surface, TechDraw, Test Framework, Web
- Hubs: User hub, Power users hub, Developer hub