How can AutoCAD stake out solids?

The curves used for lofting must be fully open or fully closed. You cannot use a selection set that contains both open and closed curves.

You can specify the path of the loft operation. Specifying a path gives you more control over the shape of the lofted solid or surface. It is recommended that the path curve start in the plane where the first cross-section is located and end in the plane where the last cross-section is located.

You can also specify guide curves at loft time. Guide curves are another way to control the shape of a lofted solid or surface. You can use guide curves to control how points match the corresponding cross-section to prevent undesirable effects, such as wrinkles in the resulting solid or surface.

Each guide curve must meet the following conditions:

Intersect with each cross-section.

Start with the first cross-section.

Stops at the last cross-section.

You can select any number of guide curves for a loft surface or solid.

When you create a loft surface or solid using only cross-sections, you can also use the options in the Loft Settings dialog box to control the shape of the surface or solid.

When creating loft solids or surfaces, you can use the following table, which shows the objects that can be used.

Don't do the area when lofting, merge the lines into a closed line in the modification command, and then the loft is the solid, cad11,12,13, the lofting command and function are wrong, the generation is a surface, look at the empty body, only just say the way.

The most likely cause is that it is not closed.

The lofting function of CAD is in 3D modeling, so do you know how to use the lofting function of CAD? The following is how I can use the lofting function of CAD, I hope to give you an answer.

The so-called "lofting" is a basic method for building a 3D CAD model. It uses the 3D lofting function to establish several feature sections and easily form 3D solids or classic surfaces.

Figure 1 Loft Function:

In CAD, after executing the Loft command to specify the cross-section of the loft in turn, use the three CAD lofting methods: guide, path, or section only.

1. Guide: Select a number of straight lines, arcs, splines, and polylines as guide curves, and the lofting entity will incorporate the specified guide curve into its boundary when generating, so the guide curve will directly affect the generation of the outline of the dust tomb outside the entity, and the following figure is to select a group of straight lines and curves as the different effects of the guide curve, see Figure 2.

Fig. 22, path: path is different from guide, there can only be one, lofting path must intersect with the plane where all cross sections are located, path will directly affect the generation mode of solid cross-section, the following figure is the effect comparison of selecting straight line and curve as path respectively, see Fig. 3.

Fig.33, Cross-section only: Select only cross-section, and the lofting Hu Liang setting dialog box pops up. In the dialog box, the user can set straight grain, smooth fit, and normal.

Loft parameters such as pointing and draft slope. By setting the lofting parameters, the effect of entity generation is controlled, as shown in Figure 4.

Fig. 4 In the 3D CAD design, the lofting greatly reduces the difficulty of 3D CAD modeling, and the "lofting" function in CAD is undoubtedly very practical for users with modeling needs. With the trouser brother wide household, you only need to draw a few feature sections in CAD, and control the relative position of the sections, you can automatically complete the solid and surface construction between the sections, and generate an ideal 3D model.

In CAD, the loft function can be used to create solid loft commands according to the structure of the object, and the specific methods are as follows:

1. Open CAD and select the drawing you want to loft.

2. Extend the two sides and intersect at one point.

3. Take the state of the bottom edge as the center of the circle, and draw a circle with the length of the bottom edge as the diameter.

4. Select the array, take the bottom edge as the selection object, and the bottom edge as the center.

5. Draw a circle with the end of the bottom edge as the center of the circle, and the intersection point of the array line and the circle as the radius.

6. Draw a circle with the intersection point of the side as the center of the circle, and the intersection point between the circle and the bottom edge as the radius.

7. Select the spline, starting from the end of the bottom edge, the spline is tangent to the green sail drawn, and the yellow line in the figure.

8. Loft the other bottom edge with the same Hu bucket method.

9. Connect the ends of the two lofting curves with straight lines, and the lofting is successful.

1. In AutoCAD 2014, open the [Select Template] dialog box, select the template from it and click the [Open] button.

2. Then draw two rectangular patterns through the menu bar [Common] > [Drawing] > [Rectangle].

3. Then click on the rectangular graphic, by adjusting the position of the graph in the Z-axis direction, the two rectangular planes are parallel and no longer coincide.

4. At this time, click the menu bar [Common] > [Modeling] > [Lofting] option.

5. Select the cross-section in order of lofting, and click the two rectangular boxes respectively.

6. Finally, press Enter, pop up the selection menu, and then enter in turn, and the drawing of the loft body is completed.

7. Final lofting effect.

The region lofts out a surfaceClosing the polyline loft out is solidI randomly drew a 6-sided (out-of-tangent, r=8) and a 5-sided (out-of-tangent, r=5) with a z-axis height of 12.

1. The area is lofted into a curved surface, and in order to see it more clearly, I deleted the top surface

2. Closed polyline lofted into an entity:

Maybe your CAD version is too high.

The 2011 version of CAD generates surfaces instead of solids with region lofts.

You can turn the graph into a polyline and then stake out the inside and out, and then use the difference.

Let's give you a diagram to illustrate your question.

What is CAD Lofting? In CAD, the loft function can be used to create a solid loft according to the structure of the object. What are the tips for CAD lofting? Below I have sorted out the methods for you, I hope you like it.

Use and skills of CAD lofting:

1. Lofting--loft

2. Concept (two sections, or more than two sections, can be points).

3. Demonstration effect

Fourth, the specific use of various parameters in the operation process is explained: guide (g), path (p), cross-section only (c), and setting (s).

By default, it is only for cross-section lofting, which can be set according to your needs).

5. Setting - straight grain: the line segment transition effect appears between the two sections.

6. Setting - Smooth fitting: The transition effect of the system's custom parameters appears on the two sections.

7. Setting-Normal Pointing: Select different options for different effects.

Note the difference in effect:

8. Setting the in-draft slope: by setting the starting point and end angle and the starting point and end point amplitude, different effects are produced.

Dig this9. Path lofting - the cross-section shape is determined, and the solid is created according to the direction of the solid cross-section

Regular section path lofts.

Animation: Irregular cross-section path lofting (cross-sections are points, regular pentagons, regular triangles).

Animation demonstration: 10. Guided lofting - determine the cross-sectional shape, draw the guide line according to the outline of the entity outside the body, and then create the solid.

Two truncated section surfaces and four guide lines).

Animation: Clever application:

1. Draw the shape of an apple.

Draw out the guide line: the direction line of the apple outline.

Draw an auxiliary line, drawing a section (there are two points in the diagram as sections).

Guided lofts. Animation demonstration: 2. Hair dryer shell production.

3. Production of special-shaped rings

Practice questions are practiced

Section loft. Irregular section lofts.

Path loft. Guided lofts.