PartDesign Legacy/es

El banco de trabajo de Diseño de Piezas pretende proporcionar herramientas para modelar piezas sólidas complejas y está basado en una metodología de edición de operaciones. Está intrínsecamente vinculado con el el banco de trabajo Croquizador.

What is a single contiguous solid? This is an item like a casting or something machined from a single block of metal. If the item involves nails, screws, glue or welding, it is not a single contiguous solid. As a practical example, PartDesign would not be used to model a wooden chair, but would be used to model the subcomponents (legs, slats, seat, etc). The subcomponents are combined using the Assembly, Part or Draft workbench.



Conceptos básicos de funcionamiento
Los croquis son los bloques de construcción elementales para la creación y edición de piezas sólidas. El proceso de trabajo se puede resumir así: Un croquis conteniendo geometría 2D se crea primero, después una herramienta de creación de sólidos se utiliza sobre el croquis. De momento las herramientas disponibles son:


 * Saliente que extruye un croquis
 * Cavidad que crea una cavidad en una pieza existente
 * Revolución que crea un sólido revolucionando un perfil alrededor de una eje
 * Muesca' que crea una muesca en un sólido existente

Se han planeado más herramientas para las versiones futuras.

Un concepto muy importante en el entorno de Diseño de Pieza es el soporte de croquis. Los croquis pueden crearse en planos estándar (XY, XZ, YZ y planos paralelos a ellos) o sobre la cara de un sólido existente. En este último caso, el sólido existente se convierte en el soporte del croquis. Varias herramientas sólo trabajarán con croquis que tengan un soporte, por ejemplo, cajera - sin un soporte no existirá nada de donde eliminar material!

Después de que una geometría sólida ha sido creada se puede modificar con chaflanes y redondeos o transformada, por ejemplo con simetría o matrices.

El entorno de Diseño de Piezas está pensado para crear un sólido conectado individual. Los sólidos múltiples serán posibles con el entorno de ensamblaje.

As we create a model in the Part Design Workbench, each feature takes the shape of the last one and adds or removes something, creating linear dependencies from feature to feature as the model is created. Hence a "Cut" feature is not only the cut hole itself, but the whole part with the cut. As a new feature is added to the model, FreeCAD turns off visibility of the old features. The user usually should only have the newest item (feature) in the model tree visible, because otherwise the other phases of the model overlay each other, and holes are filled in by the earlier model features that didn't yet have those holes.

To toggle visibility of an object on or off, select it in the hierarchy tree and press the Spacebar. Usually everything but the last item in the hierarchy tree should be greyed out and therefore not visible in the 3D view.

Las herramientas
Las herramientas de Diseño de Piezas están ubicadas en el menú Diseño de Piezas que aparece cuando se carga el módulo de Diseño de Piezas.

Estas incluyen las herramientas del Entorno del Croquizador, de modo que el módulo de Diseño de Piezas es así dependiente de este.

Properties
There are two types of feature properties accessible through tabs at the bottom of the property editor:
 * : properties related to the "visual" display of an object.
 * : properties related to the "physical" parameters of an object.

View



 * : Indicates if a box showing the overall extent of the object is to be displayed. Value False, or True (Default, False).
 * : Indicates if the feature control points are to be displayed. Value False, or True (Default, False).
 * : Sets the accuracy of the polygonal representation of the model in the 3d view (tessellation). Lower values = better quality. The value is in percent of object's size (deviation in mm = (w+h+d)/3*valueInPercent/100, where w,h,d are the bounding box dimensions).
 * :Display mode of the feature, Flat lines, Shaded, Wireframe, Points [[IMAGE:Vue_DisplayModePartDesign_fr_00.png|96px]]. (Default, Flat lines).
 * : Lighting One side, Two side [[IMAGE:Vue_Lighting_fr_00.png|96px]]. (Default, Two side).
 * : Gives the color of the line (edges) (Default, 25, 25, 25).
 * : Gives the thickness of the line (edges) (Default, 2).
 * : Gives the color of the points (ends of the feature) (Default, 25, 25, 25).
 * : Gives the size of the points (Default, 2).
 * : Allows selection of the feature. Value False, ou True (Default, True).
 * : Give the color shape (default, 204, 204, 204).
 * : Sets the degree of transparency in the feature of 0 to 100 (Default, 0).
 * : Determines the visibility of the feature (like the bar ). Value False, or True (Default, True).

Data


Every feature has a placement that can be controlled through the Data Properties table. It controls the placement of the part with respect to the coordinate system. NOTE: The placement properties do not affect the physical dimensions of the feature, but merely its position in space! If you select the title Placement, a button with appears to the right. Clicking this button, opens the Tasks_Placement options window.

An angle is set here, and the axis that the angle acts upon is set with the axis property. The feature is rotated by the specified angle, about the specified axis. A usage example might be if you created a revolution feature as required, but then needed to rotate the whole feature by some amount, in order to allow it to line-up with another pre-existing feature.

The exact value of rotation comes from the angle property (above). This property takes three arguments, which are passed as numbers in the x, y, and z boxes in the tool. Setting a value for more than one of the axes will cause the part to be rotated in each axis, by the angle value multiplied by the value for the axis. For example, with an angle of 15° set, specifying a value of 1.0 for x, and 2.0 for y will cause the finished part to be rotated 15° in the x-axis AND 30° in the y-axis.

This takes three arguments, which are passed as numbers to the x, y, and z boxes in the tool. Setting a value for more than one of the boxes will cause the part to be translated by the number of units along the corresponding axis.



PS: The displayed properties can vary, depending on the tool used.

Tutorials
Only for a development version of FreeCAD that is not currently available as a binary or installer:
 * PartDesign Bearingholder Tutorial I
 * PartDesign Bearingholder Tutorial II


 * PartDesign tutorial


 * Basic Part Design Tutorial
 * Sketcher tutorial