Bancada de trabalho Desenho de Peças (PartDesign)

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Introduction

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 uses a feature based methodology. A component is represented by the Body object container. The Body defines a local coordinate system and contains the cumulative features that define the component. Most features are based on parametric sketches and are either additive or subtractive. For example, the Pad tool adds the extruded sketch to the developing solid, the Pocket tool subtracts the extruded sketch. Each feature is cumulative and builds on the result of preceding features. It is also possible to use primitives (Cylinder, Sphere, etc.) as well as solids created outside the Body as features.

See the feature editing page for a more complete explanation of this process, and then see Creating a simple component with PartDesign to get started with creating solids.

The Part Workbench provides an alternative constructive solid geometry (CSG) methodology for building shapes. For a detailed discussion of the Part Workbench versus the Part Design Workbench see Part and Part Design.

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.

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

These tools are in fact not part of the PartDesign Workbench. They belong to the Std Base system. They were developed in v0.17 with the intention that they would be useful to organize a model, and create assemblies; as such, they are very useful when working with bodies created with this workbench.

  • Part: adds a new Part container in the active document and makes it active.
  • Group: adds a Group container in the active document, which allows organizing the objects in the tree view.

Part Design Helper tools

  • Create body: creates a Body object in the active document and makes it active.
  • Create Sketch:
  • 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.
  • Attach sketch: attaches a sketch to geometry selected from the active body.
  • Validate sketch: verifies the tolerance of different points and adjusts them.
  • Create a datum:

Part Design Modeling tools

Additive tools

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

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

Subtractive tools

These are tools for subtracting material from an existing body.

  • Pocket: creates a pocket from a selected sketch.
  • Hole: creates a hole feature from a selected sketch. The sketch must contain one or multiple circles.
  • Groove: creates a groove by revolving a sketch around an axis.
  • Subtractive loft: creates a solid shape by making a transition between two or more sketches and subtracts it from the active body.
  • 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.
  • Subtractive helix: creates a solid shape by sweeping a sketch along a helix and subtracts it from the active body.
  • Create a subtractive primitive:

Boolean

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

Dress-up tools

These tools apply a treatment to edges or faces.

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

Transformation tools

These are tools for transforming existing features.

  • Mirrored: mirrors one or more features.
  • Create MultiTransform: creates a pattern by combining any of the transformations mentioned above, as well as the Scaled transformation.
    • Scaled: scales one or more features. This is not available as a separate transformation tool.

Extras

Some additional functionality found in the Part Design menu:

  • Sprocket: creates a sprocket profile that can be padded.
  • Involute gear: creates an involute gear profile that can be padded.
  • 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.

Context Menu items

  • 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.

Items shared with the Part workbench

  • Appearance: determines appearance of the whole part (color transparency etc.).

Obsolete tools

  • Migrate: migrates files from FreeCAD versions below 0.17 to version 0.17. This tool is not available in version 1.0 and above.

Preferences

  • Preferences: preferences available for PartDesign Tools.
  • Fine tuning: some extra parameters to fine-tune PartDesign behavior.

Tutorials

Examples

For some ideas of what can be achieved with Part Design tools, have a look at: PartDesign examples.