Bancada de trabalho Desenho de Peças (PartDesign)

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Workbench PartDesign.svg

Com o próximo lançamento do FreeCAD versão 0.17, a bancada de trabalho Desenho de Peças beneficiará de importantes alterações. Este documento reflete esta nova versão. Para utilizadores do FreeCAD 0.16 , por favor consulte a antiga página PartDesign Legacy.

A Bancada de Desenho de Peças fornece ferramentas avançadas para modelar peças solidas complexas e baseia-se numa Metodologia de edição de recursos. Esta é foca-se principalmente, mas não apenas, na criação de peças mecânicas. Esta esta intrincadamente ligada com A bancada Esboço (Sketcher).

The PartDesign Workbench is intrinsically related to the Sketcher Workbench. The user normally creates a Sketch, then uses the PartDesign Pad tool to extrude it and create a basic solid, and then this solid is further modified.

While the Part Workbench is based on a constructive solid geometry (CSG) methodology for building shapes, the PartDesign Workbench uses a parametric, feature editing methodology, which means a basic solid is sequentially transformed by adding features on top until the final shape is obtained. See the feature editing page for a more complete explanation of this process, and then see Creating a simple part with PartDesign to get started with creating solids.

The bodies created with PartDesign are often subject to the topological naming problem which causes internal features to be renamed when the parametric operations are modified. This problem can be minimized by following the best practices described in the feature editing page, and by taking advantage of datum objects as support for sketches and features.

PartDesign Example.png

Ferramentas

The Part Design tools are all located in the Part Design menu and the PartDesign toolbar that appear when you load the Part Design workbench.

Structure tools

These are tools to organize the Model tree.

  • Std Part.png Part: adds a new Part container in the active document and makes it active.
  • Group.svg Group: adds a Group in the active document's Model tree.

These are tools to organize the Model tree.

  • Geofeaturegroup.svg Part: adds a new Part container in the active document and makes it active.
  • Group.svg Group: adds a Group in the active document's Model tree.

Part Design Helper tools

  • PartDesign Body.png Create body: Creates a Body in the active document and makes it active.
  • Sketcher NewSketch.svg Create sketch: creates‎ a new sketch on a selected face or plane. If no face is selected while this tool is executed, the user is prompted to select a plane from the Tasks panel. The interface then switches to the Sketcher Workbench in sketch editing mode.
  • Sketcher MapSketch.svg Map sketch to face: Maps a sketch to a previously selected plane or a face of the active body.

Part Design Modeling tools

Datum tools

Additive tools

These are tools for creating base features or adding material to an existing solid body.

  • PartDesign Pad.svg Pad: extrudes a solid from a selected sketch.
  • PartDesign Revolution.svg Revolution: creates a solid by revolving a sketch around an axis. The sketch must form a closed profile.
  • PartDesign Additive Loft.svg Additive loft: creates a solid by making a transition between two or more sketches.
  • PartDesign Additive Pipe.svg Additive pipe: creates a solid by sweeping one or more sketches along an open or closed path.

Subtractive tools

These are tools for subtracting material from an existing body.

  • PartDesign Pocket.svg Pocket: creates a pocket from a selected sketch.
  • PartDesign Hole.svg Hole: creates a hole feature from a selected sketch. The sketch must contain one or multiple circles.
  • PartDesign Groove.svg Groove: creates a groove by revolving a sketch around an axis.
  • PartDesign Subtractive Loft.svg Subtractive loft: creates a solid shape by making a transition between two or more sketches and subtracts it from the active body.
  • PartDesign Subtractive Pipe.svg Subtractive pipe: creates a solid shape by sweeping one or more sketches along an open or closed path and subtracts it from the active body.

Transformation tools

These are tools for transforming existing features. They will allow you to choose which features to transform.

  • PartDesign Mirrored.svg Mirrored: mirrors one or more features on a plane or face.
  • PartDesign LinearPattern.svg Linear Pattern: creates a linear pattern based on one or more features.

Dress-up tools

These tools apply a treatment to the selected edges or faces.

  • PartDesign Fillet.svg Fillet: fillets (rounds) edges of the active body.
  • PartDesign Chamfer.svg Chamfer: chamfers edges of the active body.
  • PartDesign Draft.svg Draft: applies an angular draft to selected faces of the active body.
  • PartDesign Thickness.svg Thickness: creates a thick shell from the active body and opens selected face(s).

Boolean

  • PartDesign Boolean.svg Boolean operation: imports one or more Bodies or PartDesign Clones into the active body and applies a Boolean operation.

Extras

Some additional functionality found in the Part Design menu:

  • Migrate: migrates files created with older FreeCAD versions. If the file is pure PartDesign feature-based, migration should succeed. If the file contains mixed Part/Part Design/Draft objects, the conversion will most likely fail.
  • WizardShaft.svg Shaft design wizard: Generates a shaft from a table of values and allows to analyze forces and moments. The shaft is made with a revolved sketch that can be edited.
  • PartDesign InternalExternalGear.svg Involute gear: creates an involute gear profile that can be used by a Pad.

Contextual Menu tools

  • PartDesign MoveTip.svg Set tip: redefines the tip, which is the feature exposed outside of the Body.
  • Move object after other object: allows reordering of the Body tree by moving the selected sketch, datum geometry or feature to another position in the list of features.

Preferences

  • Preferences-general.svg Preferences...: Preferences available in PartDesign Tools.
  • Fine-tuning: Some extra parameters to fine-tune PartDesign behavior

Tutorials

Links