DiseñoPiezas AditivoTubo

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Additivo loft

Crear un primitivo aditivo

DiseñoPiezas

Ubicación en el Menú
DiseñoPiezas AdditivoTubo
DiseñoPiezas → Additivo Tubo
Entornos de trabajo
DiseñoPiezas
Atajo de teclado por defecto
Ninguno
Introducido en versión
0.17
Ver también
DiseñoPiezas Additivo Loft, DiseñoPiezas Tubo sustractivo

Descripción

El Tubo Aditivo crea un sólido en el Cuerpo activo barriendo uno o más bosquejos (también conocidos como secciones transversales) a lo largo de un camino abierto o cerrado. Si el Cuerpo ya contiene características, la tubería aditiva se fusionará con ellas.

"A la izquierda: secciones transversales (A) y (B) para ser barridas a lo largo del camino (C); Tubo Aditivo resultante a la derecha.

Utilización

La imagen de ejemplo de arriba muestra dos formas de sección transversal diferentes. El texto a continuación describirá el procedimiento con una sola forma. Esto logrará una parte con la misma sección transversal a lo largo de todo el camino.

Create two separate sketches;
- one for the path, e.g two lines connected by a curve as in the image above,
- one for the cross-section shape, e.g. a circle as the first shape in the image above. Instead of a sketch also the face of a 3D object can be used. (introduced in version 0.20)
Arrange the two shapes in 3D correctly. It is recommended to place the origin of the cross-section onto the line of the path. The two sketches should in most cases be orthogonal. This can be done with the 'Map Mode' function (make both sketches visible with Space. Select the cross-section sketch. Select Properties/DataTab/MapMode. Click the appearing ... button at the right side. In the Attachment Dialog select a vertex of the path sketch and select the correct mode to get the two sketches aligned correctly).
Press the Additive pipe button.
In the Select feature dialog select a sketch to be used cross-section and click OK.
- Alternatively, a sketch or a face of a 3D object (introduced in version 0.20) can be selected prior to pressing the Additive pipe button. In that case you will not get a "Select feature' dialog.
In the Pipe parameters under Path to sweep along, press the Object button.
Select the sketch to be used as path in the 3D view. In this case the whole sketch will be used as path.
- Alternatively, single edges of the sketch can be selected by pressing Add Edge and selecting edges in the 3D view. Note that you must press the Add Edge for each edge again. You must select a continous line with no branches.
The other settings should work with the default settings in most cases.
Click OK.

To use more than one cross-section, start with the first cross-section sketch as described above. Then under Section transformation set the Transform mode to Multisection; press Add Section then select a sketch in the 3D view. Repeat for each additional cross-section.

Options

Section Transformation:

Select Constant to use a single profile
Select Multisection to use multiple profiles

Section Orientation:

Standard
This keeps the cross section shape perpendicular to the path. This is the default setting.
Fixed
- Orientation set by first profile and constant throughout. This deactivates the alignment to the path normal vector. That means that the cross-section shape will not rotate with the path. Sweep along a circle to see the effect.
Frenet
- Create minimum possible twisting of profile. For more info, see Frenet-Serret Formulas
Auxiliary
- Specify secondary path to guide pipe.
- For each point P along the sweep path, there will be a corresponding point Q on the auxiliary path.
- As the profile is swept, it will be transformed such that the PQ line is the normal of the sweep path.
- If Curvilinear is set, then the Q points are scaled proportionally along the sweep path, regardless of it's length.
Binormal
- Specify binormal vector in X, Y and Z

Corner Transition

Transformed
Right
Rounded

Propiedades

DatosLabel: name given to the operation, this name can be changed at convenience.
DatosRefine: true or false. If set to true, cleans the solid from residual edges left by features. See Part RefineShape for more details.
DatosSections: lists the sections used.
DatosSpine Tangent: true or false (default). True extends the path to include tangent edges.
DatosAuxiliary Spine Tangent: true or false (default). True extends the auxiliary path to include tangent edges.
DatosAuxiliary Curvelinear: true or false (default). True calculates normal between equidistant points on both spines.
DatosMode: profile mode. See Options.
DatosBinormal: binormal vector for corresponding orientation mode.
DatosTransition: transition mode. Options are Transformed, Right Corner or Round Corner.
DatosTransformation: Constant uses a single cross-section. Multisection uses two or more cross-sections. Linear, S-shape and Interpolation are currently not functional.

Notes

To better control the shape of the pipe, it is recommended that all cross-sections have the same number of segments. For example, for a pipe between a rectangle and a circle, the circle should be broken down into 4 connected arcs.
You can pipe from or toward a single vertex from a sketch or the body. introduced in version 0.20
When you select a vertex as section, it must be the last section of the pipe. Otherwise the pipe body would consist of two solids connected at a single point. This would violates the CAD kernel's definition of a 3D object. You can change the order of the sections by dragging them in the list.
The path can only be from a single sketch, feature or ShapeBinder. In case you want to sweep along several edges from different sketches, use a SubShapeBinder.
The path must not contain branches or T-junctions etc. Loops are allowed.
It can lead to issues if the cross-section is not perpendicular to the path in 3D.
A cross-section cannot lie on the same plane as the one immediately preceding it.
The cross-sections must not contain disjoint or crossing loops.