PartDesign: Elica additiva

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Elica Additiva

Posizione nel menu
Part Design → Crea una funzione additiva → Elica additiva
Ambiente
PartDesign
Avvio veloce
Nessuno
Introdotto nella versione
0.19
Vedere anche
Elica sottrattiva

Descrizione

Lo strumento Elica additiva crea un solido facendo scorrere uno schizzo selezionato o un oggetto 2D lungo un percorso elicoidale.

Il profilo (B), viene fatto scorrere attorno all'asse (A) per produrre l'elica solida (C)

Utilizzo

  1. Select the sketch to be swept into a helix. A face on the existing solid can alternatively be used.
  2. Press the PartDesign AdditiveHelix button.
  3. Set the Helix parameters (see next section).
  4. Inspect the Helix in the view window, to ensure that the parameters do not result in a self intersecting helix.
  5. Press OK.

Opzioni

Quando si crea un'elica additiva, la finestra di dialogo Parametri dell'elica offre diversi parametri che specificano come deve essere fatto scorrere lo schizzo.

Asse

This option specifies the axis about which the sketch is to be swept.

  • Normal sketch axis: selects the normal of the sketch that runs through the sketch origin as axis. introduced in version 0.20
  • Vertical sketch axis: selects the vertical sketch axis. This is the default for new helices.
  • Horizontal sketch axis: selects the horizontal sketch axis.
  • Construction line: selects a construction line contained in the sketch used by the Helix. The drop down list will contain an entry for each construction line. The first construction line created in the sketch will be labelled Construction line 1.
  • Base (X/Y/Z) axis: selects the X, Y or Z axis of the Body's Origin;
  • Select reference...: allows selection in the 3D view of an edge on the Body, or a datum line.

Modalità

This controls what parameters will be used to define the helix. The choices are:

  • Pitch-Height-Angle: definition via the height per turn and the overall height
  • Pitch-Turns-Angle: definition via the height per turn and the number of turns
  • Height-Turns-Angle: definition via the overall height and the number of turns
  • Height-Turns-Growth introduced in version 0.20: definition via the overall height, the number of turns and the growth of the helical radius. So a Height of zero leads to a path in form of a spiral. A Height and Growth of zero to leads to a path in form of a circle.

Passo

La distanza tra le spire dell'elica.

Altezza

La lunghezza dell'elica (centro-centro).

Numero giri

The number of turns in the helix. Define as Height/Pitch

Angolo cono

Angolo del cono che forma un avvolgimento attorno all'elica. Intervallo consentito: [-89°, +89°].

Sinistrorsa

Se selezionato, la direzione di rotazione dell'elica viene invertita da quella predefinita in senso orario a quella antioraria.

Invertita

Se selezionato, la direzione dell'asse dell'elica viene invertita rispetto a quella predefinita.

Aggiorna la vista

If checked, the helix will be shown in the view, and updated automatically on every change of the parameters.

Preferenze

  • An additive helix that does not intersect the body will be visible in the preview if Tools → Edit parameters... → BaseApp → Preferences → Mod → PartDesign → AdditiveHelixPreview is set to true. The default for this preference is false. introduced in version 0.20

Proprietà

  • DatiPitch: The axial distance between two turns.
  • DatiHeight: The total length of the helix (not accounting for the extent of the profile)
  • DatiTurns: The number of turns (does not need to be a whole number)
  • DatiLeft Handed: See Left Handed.
  • DatiReversed: See Reversed.
  • DatiAngle: The rate at which the radius of the helix increase along the axis. Allowable range: [-89°, +89°].
  • DatiReference axis: The helix axis
  • DatiMode: The helix input mode (pitch-height, pitch-turns, turns-height)
  • DatiOutside: Not used (Used in SubtractiveHelix)
  • DatiHas Been Edited: If false, the tool will propose an initial value for pitch based on the profile bounding box, so that self intersection is avoided.
  • DatiRefine: true or false. If set to true, cleans the solid from residual edges left by features. See Part RefineShape for more details.
  • DatiProfile: Either a sketch containing a closed contour, or a face.
  • DatiMidplane: Not used.
  • DatiUp to face: Not used.
  • DatiAllow multiple face: Not used.

Note

Esempi

Example helix using a B-spline in the sketch
Example helix where the helix axis is normal to the sketch plane resulting in a "Pad with twist" effect.