KOMPAS-3D v24

In this section:

Objects, used as a section of a revolution element

Dependence of the revolution operation result on the section parameters

Section of a revolution element

Notes on using sketches and sketch areas in section

Objects, used as a section of a revolution element

One or more model objects can be selected as the cross-section of the revolution element. These objects can be:

•sketch or closed area in sketch (see section Using sketches in operations),

•face,

•3D curve,

•edge.

The set of selected objects can be arbitrary.

If necessary, you can draw a contour or sketch without interrupting the command and add it to the set of section objects.

Notes on using sketches and sketch areas in section

The types of section objects and their shape affect the result of the construction.

Construction of a toroid and spheroid

There are two types of construction for the rotation element: toroid and spheroid.

Construction type Toroid is available for cross-section objects regardless of type and shape.

Construction type Spheroid is available only for open sketches and open contours constructed along the lines of a flat object, provided that the axis of rotation lies in the plane of the section. For these objects, you can select between a spheroid and a toroid — the corresponding buttons are available on the Parameters panel. If the section includes other objects, the buttons for selecting the construction type are not available.

More about types of rotation element construction...

The ability to build a solid and thin-walled element

The characteristics of the selected objects determine whether a solid or thin-walled element can be obtained. More about solid and thin-walled elements...

Both construction options are available for some objects, while for others only thin-walled elements can be constructed. Examples of solid and thin-walled elements are shown in the figures.

The rotating element can be either solid or thin-walled in the following cases:

•All objects in the section are flat and closed.

•The intersection objects are open, but the following conditions are met:

•all objects in the section are sketches and/or contours constructed along sketch lines or flat face edges.

•in the construction Type group, the Spheroid button is pressed.

Section of a revolution element

To set the cross-section of a rotational element, use the elements in the Main section of the Parameter panel.

•To select existing objects as a section, click in the Section field and specify the required objects in the Design tree or in the model's graphics area. Specifying a sketch and an area in the sketch has some special features.

•To create a new object (contour or sketch), follow these steps.

•To build a contour, click the Create contour button to the right of the Section field. The process of creating a contour will launch. Select the objects included in the outline and click the Create object.

•To create a sketch, click the button Create a sketch to the right of the Section field. The process of creating a sketch will be launched, and then the system will go to sketch mode to build geometry. Perform the steps necessary for construction and complete the work in sketch mode.

After completing the process of creating a contour/sketch, the system returns to the revolution operation process. The created contour/sketch appears in the Design tree and is automatically added to the set of revolution element section objects.

The names of the objects selected as a section are displayed in the Section field as a list.

If necessary, you can change the set of section objects. To do this, click in the Section field and edit the list by deleting and adding objects.

If the section is a sketch (an area in the sketch), you can edit the sketch without interrupting the command. To do this, select it in the Section field and click the Edit button next to the field. Editing the contour is performed in a similar manner if it is used as a cross-section.

Notes on using sketches and sketch areas as section

You can either select an entire sketch or an area within the sketch as a section, which is created by the intersection of sketch contours or limited by one of them (see section Using sketches in operations).

•To select the required sketch, specify one of its objects in the graphic area of the model or specify the sketch itself in the Design tree. In the Section field, the sketch name will be displayed.

•To select an area in the sketch, click inside this area. In the field Section, the sketch name and the word Region will be displayed.

A sketch may contain one or more contours.

When selecting a sketch with multiple closed contours, as well as areas within the sketch, keep the following in mind.

•If the contours intersect, the cross-section of the rotational element is obtained by combining the areas bounded by these contours.

•If the contours do not intersect (also if separate areas are specified), the following construction options are possible.

•Element with holes — a section is a non-continuous area in a sketch or a sketch containing nested contours with a nesting level of 1.

•Element made of separate parts — a section is several separate areas in a sketch or a sketch containing separate contours or contours nested within each other with a nesting level greater than 1.

To construct a rotation element, the axis of rotation (or its extension) must not intersect any of the contours of the selected sketch. However, some of the contour points may lie on the axis (or its extension):

•for closed circuits — any of their points and/or sections,

•for open circuits — only their lateral points.

When selecting an area in the sketch, the boundary of the area must not cross the selected axis of rotation (or its extension). Some points on the boundary of the area may lie on the axis (or its extension).