PartDesign Workbench/zh

Introduction
The PartDesign Workbench provides advanced tools for modeling complex solid parts. It is mostly focused on creating mechanical parts that can be manufactured and assembled into a finished product. Nevertheless, the created solids can be used in general for any other purpose such as architectural design, finite element analysis, or machining and 3D printing.

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.



Tools
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.


 * [[Image:Std_Part.png|32px]] Part: adds a new Part container in the active document and makes it active.
 * [[Image:Group.svg|32px]] Group: adds a Group in the active document's Model tree.

These are tools to organize the Model tree.


 * [[Image:Std_Part.png|32px]] Part: adds a new Part container in the active document and makes it active.
 * [[Image:Group.svg|32px]] 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.


 * PartDesign_NewSketch.png 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.


 * [[Image:Sketcher_EditSketch.png|32px]] Edit sketch: Edit the selected Sketch.


 * [[Image:Sketcher_MapSketch.png‎|32px]] Map sketch to face: Maps a sketch to a previously selected plane or a face of the active body.

Datum tools

 * PartDesign Point.png Create a datum point: creates a datum point in the active body.


 * PartDesign Line.png Create a datum line: creates a datum line in the active body.


 * PartDesign Plane.png Create a datum plane: creates a datum plane in the active body.


 * PartDesign CoordinateSystem.png Create a local coordinate system: creates a local coordinate system attached to datum geometry in the active body.


 * PartDesign ShapeBinder.png Create a shape binder: creates a shape binder in the active body.


 * PartDesign Clone.png Create a clone: creates a clone of the selected body.

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


 * PartDesign_Pad.png Pad: extrudes a solid from a selected sketch.


 * PartDesign_Revolution.png Revolution: creates a solid by revolving a sketch around an axis. The sketch must form a closed profile.


 * PartDesign AdditiveLoft.png Additive loft: creates a solid by making a transition between two or more sketches.


 * PartDesign AdditivePipe.png Additive pipe: creates a solid by sweeping one or more sketches along an open or closed path.


 * PartDesign_CompPrimitiveAdditive.png Create an additive primitive: adds an additive primitive to the active body.


 * PartDesign AdditiveBox.png Additive box: creates an additive box.


 * PartDesign AdditiveCone.png Additive cone: creates an additive cone.


 * PartDesign AdditiveCylinder.png Additive cylinder: creates an additive cylinder.


 * PartDesign AdditiveEllipsoid.png Additive ellipsoid: creates an additive ellipsoid.


 * PartDesign AdditivePrism.png Additive prism: creates an additive prism.


 * PartDesign AdditiveSphere.png Additive sphere: creates an additive sphere.


 * PartDesign AdditiveTorus.png Additive torus: creates an additive torus.


 * PartDesign AdditiveWedge.png Additive wedge: creates an additive wedge.

Subtractive tools
These are tools for subtracting material from an existing body.


 * PartDesign Pocket.png Pocket: creates a pocket from a selected sketch.


 * PartDesign Hole.png Hole: creates a hole feature from a selected sketch. The sketch must contain one or multiple circles.


 * PartDesign Groove.png Groove: creates a groove by revolving a sketch around an axis.


 * PartDesign SubtractiveLoft.png Subtractive loft: creates a solid shape by making a transition between two or more sketches and subtracts it from the active body.


 * PartDesign SubtractivePipe.png 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.


 * PartDesign_CompPrimitiveSubtractive.png Create a subtractive primitive: adds a subtractive primitive to the active body.


 * PartDesign SubtractiveBox.png Subtractive box: adds a subtractive box to the active body.


 * PartDesign SubtractiveCone.png Subtractive cone: adds a subtractive cone to the active body.


 * PartDesign SubtractiveCylinder.png Subtractive cylinder: adds a subtractive cylinder to the active body.


 * PartDesign SubtractiveEllipsoid.png Subtractive ellipsoid: adds a subtractive ellipsoid to the active body.


 * PartDesign SubtractivePrism.png Subtractive prism: adds a subtractive prism to the active body.


 * PartDesign SubtractiveSphere.png Subtractive sphere: adds a subtractive sphere to the active body.


 * PartDesign SubtractiveTorus.png Subtractive torus: adds a subtractive torus to the active body.


 * PartDesign SubtractiveWedge.png ‎Subtractive wedge: adds a subtractive wedge to the active body.

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


 * [[Image:PartDesign_Mirrored.png|32px]] Mirrored: mirrors one or more features on a plane or face.


 * [[Image:PartDesign_LinearPattern.png|32px]] Linear Pattern: creates a linear pattern based on one or more features.


 * [[Image:PartDesign_PolarPattern.png|32px]] Polar Pattern: creates a polar pattern of one or more features.


 * [[Image:PartDesign_MultiTransform.png|32px]] Create MultiTransform: creates a pattern with any combination of the other transformations.

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


 * PartDesign Fillet.png Fillet: fillets (rounds) edges of the active body.


 * PartDesign Chamfer.png Chamfer: chamfers edges of the active body.


 * PartDesign Draft.png Draft: applies an angular draft to selected faces of the active body.


 * PartDesign Thickness.png Thickness: creates a thick shell from the active body and opens selected face(s).

Boolean

 * PartDesign Boolean.png 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.


 * [[Image:PartDesign_WizardShaft.png|32px]] 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.


 * [[Image:PartDesign_InternalExternalGear.png|32px]] Involute gear: creates an involute gear profile that can be used by a Pad.

Contextual Menu tools

 * PartDesign MoveTip.png Set tip: redefines the tip, which is the feature exposed outside of the Body.


 * Move object to other body: moves the selected sketch, datum geometry or feature to another 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

 * [[Image:Std_DlgParameter.png|32px]] Preferences...: Preferences available in PartDesign Tools.
 * [[Image:Std_DlgParameter.png|32px]] Fine-tuning: Some extra parameters to fine-tune PartDesign behavior

Tutorials

 * How to use FreeCAD, a website describing the workflow for mechanical design.
 * Creating a simple part with PartDesign v0.17
 * Basic Part Design Tutorial 017
 * PartDesign Bearingholder Tutorial I (needs updating)
 * PartDesign Bearingholder Tutorial II (needs updating)

Links

 * What's new in PartDesign Next
 * Updated PartDesign workflow
 * FC v0.17dev: Part Design Next Usecases and Best practices
 * Sandbox:Part Design Next