Верстак PartDesign

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Revision as of 18:36, 4 May 2020 by Baritone (talk | contribs)
После выпуска FreeCAD 0.17 верстак PartDesign сильно изменился. Эта документация соответствует версии 0.17 и выше. Насчёт FreeCAD 0.16, пожалуйста, смотрите страницу PartDesign Legacy.


PartDesign workbench icon

Introduction

Верстак PartDesign предоставляет расширенные инструменты для моделирования сложных твердых деталей. Он в основном сосредоточен на создании механических деталей, которые можно изготовить и собрать в готовый продукт. Тем не менее, созданные тела могут быть использованы в целом для любых других целей, таких как архитектурный дизайн, анализ методом конечных элементов или механической обработки и 3D-печати.

PartDesign Workbench неразрывно связан с верстаком Sketcher. Пользователь обычно создает эскиз, затем использует инструмент PartDesign Pad для его выдавливания и создания основного тела, а затем это тело дополнительно модифицируется.

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.

Инструменты

Все инструменты проектирования деталей находятся в меню Part Design и на панели инструментов PartDesign, которая появляется при загрузке рабочей среды проектирования деталей.

Инструменты структуры

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: 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.
  • 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.

  • 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.

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.

Transformation tools

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

  • Mirrored: mirrors one or more features on a plane or face.
  • 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.

  • 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(s).

Boolean

  • 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. introduced in version 0.17
  • 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.
  • Involute gear: creates an involute gear profile that can be used by a Pad.

Contextual Menu tools

  • Set tip: redefines the tip, which is the feature exposed outside of the Body.

Preferences

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

Учебники

Ссылки