Category Archive for: Mastering 3D Solids

Finding the Properties of a Solid

All of this effort to create a solid model isn’t just to create a pretty picture. Once your model is drawn and built, you can obtain information about its physical properties. In this section, you will look at a few of the commands that let you gather such information. Finding a Model’s Mass Properties You can find the…

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Drawing a Cross-Section

One element of your drawing that is missing is a cross-section. AutoCAD will draw a cross-section through any part of the solid model. In the following exercise, you will draw such a cross-section. 1. First, save your drawing so you can return to this stage (in case you don’t want to save the results of the following steps).…

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Editing Solids

Basic solid forms are fairly easy to create. The refinement of those forms requires some special tools. In this section, you’ll learn how to use some familiar 2D editing tools to edit a solid as well as some new tools. You’ll also be introduced to the Slice tool that lets you cut a solid into two pieces. Splitting a…

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Creating Hidden-Line Views

You aren’t quite finished yet. Typically, orthographic projections, such as the top, front, and right-side view, will show the hidden portions of the model with dashed lines. For example, theholes toward the right end of the bracket would be shown dashed in the front view. You could set up the viewports to do a hidden-line removal at plot time,…

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Creating the Orthogonal Views

Now you are ready to create the orthogonal views. The next part will seem simple compared with the steps you had to take to set up the title block and viewport. 1. Click the Setup View tool on the Solids toolbar, or choose Draw >Solids :> Setup >View. 2. At the Ucs/Ortho/ Auxary /Section/<Exit>: prompt, type O.J.…

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Creating Complex Primitives

As you learned earlier, you can convert a polyline into a solid using the Extrude option on the Solids toolbar. This process lets you create more complex primitives. In addition to the simple straight extrusion you’ve already tried, you can also extrude shapes into curved paths, or you can taper an extrusion. Tapering an Extrusion Next, you’ll take…

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Separating a Divided Solid

While in the process of editing solids, you may end up with two separate solid forms that were created from one solid, as shown in Figure 18.42.Even though the two solids appear separated, they act like a single object. In these situations, Auto- CAD offers the Separate tool in the Solids Editing toolbar. To use it, just click…

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Turning a Solid into a Shell

In many situations, you’ll want your 3D model to be a hollow, rather than solid mass. The Shell tool lets you convert a solid into a shell. Here’s an example of how it might be used. 1. Choose the Shell tool from the Solids Editing toolbar. 2. Click the model. The entire model is highlighted, AutoCAD assumes…

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Creating Solid Forms

In this section, you will begin to draw the object shown in Figure 18.4.In the process, you will explore the creation of solid models by creating primitives and then setting up special relationships between them. .. Displaying the Solids Toolbar All of the commands you will use to create the solids primitives, and many of the commands you…

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Moving a Surface

The first tool you’ll try is the Move tool. The Move tool moves the surface of a solid. 1. Open the Solided it . This file is set up with the Hidden Shade mode turned on so you can see the form more easily. . 2. Click the Move Faces tool in the Solids Editing toolbar,…

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