Autocad 2007 3d Drawing Tutorial
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| Auto cad 2007_Chem-Eng21.blogspot.com |
TUTORIAL 1
AutoCAD 2007
3D Modeling
Required Competencies
Before starting this tutorial, you should have been able to:
• Use the 3D Modeling tools available in previous releases of AutoCAD
• Use AutoCAD at an intermediate to a dvanced level
• Manipulate the UCS
The new 3D modeling tools in AutoCAD 2007 allow you to model complex freeform shapes that previously were not possible to model in AutoCAD. This tutorial assumes that t he user is completely familiar with creating precise 2D sketches of arcs, lines, polylines, and splines in any location as well as the 3D tools from previous releases.
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| 3D Modeling Workspace |
1 . The first thing I would do is turn off the grid. In almost 20 years of doing CAD I have not had anyone give me a convincing reason for using a grid except for a few narrowly defined cases. I consider the use of a grid the mark of an amateur. Notice that t here is a new tool in the tray marked DUCS. The Dynamic User Coordinate System will allow you to sketch on planar faces of solids without having to manually change the UCS.
I would also turn on the LWT lineweight and experiment with the Settings display scale to get a thickness you can easily see.
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| Figure 1 |
2 . You may need to experiment with background settings to see you sketch linework.
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| figure 2 |
3 . In the upper right hand corner of the screen you will find the new Dashboard .
4 . If you move the mouse to the gray b ar in each of the control panels a down pointing chevron will appear that will reveal more tools if you click on it.
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| figure 4 |
5 . Right Mouse Button (RMB) click in one of the control panels of the D a s h bo ard and s et the visibility of the control panels as shown. Expand the 3D Make control panel. This will give you access to both t he 2D Draw and the 3D Make tools.
Figure 5
6 . In the lower right corner of the screen you will find the Tool Pallets. I prefer to have the Modify tab selected. (You should know how to customize the Tool Pallets from previous releases.) I prefer to have t he tool description text turned off and I have added a few tools that I use often, particularly Shell, which were left off of the Dashboard. Unfortunately, the Dashboard cannot be modified.
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| figure 6 |
7. Open the file named Tutorial 1. Turn off all layers except the Polysolid layer and make the Polysolid layer the active layer. I have set the delobj = 0 that all entities will be preserved. Set the Visual Style to Realistic.
• Select the Polysolid tool and RMB Select Object and click on the wireframe sketch.
Undo and then experiment with different settings for Justify, Width, and Height.
• Select the Polysolid tool and RMB Select Width, experiment with the settings.
• Select the Polysolid tool and RMB Select Height, experiment with the settings.
• Select the Polysolid tool and RMB select Justify, experiment with the settings.
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| figure 7 |
8 . You should be able to figure out how to use the se tools on your own. Pyramid is new.
Figure 8
9 . Turn off all layers except the Extrude Surfaces layer and make it the active layer.
Select the Extrude tool and extrude the arc, polyline, spline a nd line as surfaces.
Surfaces in previous releases of AutoCAD were of limited value, but in Auto C AD 200 7 surfaces can be used to edit solids.
Figure 9
10 . Turn off all layers except the PressPull layer and make it the active layer. Do a
List (li) on the entities a nd notice that there is a polyline, line, arc, and spline.
Figure 10
11 . Select the Presspull tool (or hold Ctrl + Alt) and click inside the closed boundary and pull up a solid. In previ o us releases you would have had to have a closed polyline boundary to get somet hing similar.
Figure 11
12 . Draw a circle on the face of the solid. (You might want to turn off osnap and s et your active color to something other than the solid color. (I will assume after this that you are an experienced 3D user and not bother you with the obvious.)
Notice that with the n ew Dynamic UCS that you did not have to reset your UCS
to the top of the solid to draw a circle on that face. Try drawing another circle on
one of the vertical planar faces.
Figure 12
13 . Select the Presspull tool again and click in the circle and move the cursor below the solid to "press" a hole through the solid. Repeat for the circle on the vertical face. In previous releases you would have had to create a solid cylinder and then subtract. If you wanted to "match machine" drill through multiple parts you can use the Presspull tool multiple times and the individual parts will remain separate parts with m atching holes.
Figure 13
14 . Turn off all layers except the Revolved Surfaces layer and make it the active layer. Revolve the spline and arc about the vertical line as surfaces. 
Figure 14
15 . Turn off all layers except the Sweep l ayer and make it the active layer. Start the Sweep command a nd select the green triangle as the object to sweep a nd the polyline rectangle as the path.
Figure 15
16 . Start the Sweep command again a nd select the red semi‐circle as the object to sweep. Hold down the Ctrl key and select the top edge of the triangular profile solid as the sweep path. Undo this step.
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| figure 16 |
17 . Type in the command XEDGES and select the swept triangular profile solid. The xedges command extracts the edges of a solid. Join the extracted top edges of the solid into a polyline. Sweep the s e mi‐circle along the joined polyline path.
Figure 17
18 . Undo back to the xedges command. Notice that right angle of the swept triangle follows the rectangular path. Delete t he swept solid. Start the Sweep tool and select the red triangle as the sweep object and the rectangle as the sweep path. Change the Visual Style to 3D wireframe a nd notice that the rectangular path runs through the middle of the triangular profile. If the profile is not perpendicular to the path AutoCAD realigns the middle of the profile to the path. Therefore you may need to explicitly locate your sweep profile.
Figure 18a
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| figure 18b |
19 . Delete the solid. Type in the command UCS with the ZAxis and Object options and click on the e nd of t he 3D spline. Repeat the UCS with ZA and O options and click on the other end of the 3D spline. Repeat selecting different entities. In AutoCAD 2007 t he new ZAxis option for setting the UCS makes it very easy to set to a line, arc, polyline or spline end. Set the UCS back to World.
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| Figure 19 |
20 . Sweep the red circle along the line, polyline rectangle, 2D spline, and the 3D spline. Undo and then sweep along the 3D spline using the Alignment, No options. Delete the solid.
Figure 20
21 . Sweep the square tube region along the line as shown.
Figure 21
22 . Sweep the region along the 3D spline path (this one may t a ke a few seconds to complete). Undo the sweep.
Figure 22
23 . Sweep the region again this time using the Twist option and enter 2 7 0° as the twist angle.
Figure 23
24 . Sweep the region along the rectangular polyline path .
Figure 24
25 . Sweep the blue line as a surface along the line path, rectangular polyline, 2D
polyline, and 3D polyline paths.
26 . If you haven't already done so, e xp and the 3D Make control panel to reveal the new Helix command.
Figure 26
27 . Turn off all layers except the Loft layer and make it the active layer.
Figure 27
28 . Loft the line to the arc and the polyline rectangle to the circle. Experiment with the Loft Settings. After experimenting undo a nd Loft with t he Smooth Fit surface control.
Figure 28
29 . Turn on the Loft with Guides layer and loft the polyline rectangle to the circle with the Guides option a nd select the 16 guides.
Figure 29
30 . Examine the different results.
Figure 30
31 . Turn on the Loft with Path layer and loft the circles and arcs along the arc paths.
Figure 31
32 . Turn off all layers except the Planar Surface layer and ma ke it the active layer.
Select the P l anar Surface tool and choose the Object option and then click on the circle the polyline rectangle and all of the edges of the irregular shape comprised
of a polyline, arc, and spline.
Figure 32
33 . If you haven't already done so, e xp and the 3D Make control panel to reveal the
Thicken Surface tool a nd use it to thicken the planar surfaces.
Figure 33
34 . Draw some closed sha p es on t he thickened surface solids. With DUCS active you do not have to change ucs to planar faces.
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| figure 34 |
35 . In AutoCAD 20 07 is no longer necessary to create a 3D solid to imprint on a planar face of another solid. Select the Imprint tool and imprint the planar closed boundaries on the planar faces. Use the Color Faces on the Solids Editing toolbar to change the face colors. 
Figure 35
36 . I don't h a ve any examples for the Section Plane and the Flatshot tools at this
time. I use t he solview, soldraw, or solprof com mands to create 2D layout views. I guess if you wanted these views as modelspace blocks you might find t hese useful. I would be interested in hearing about your implementation of t hese
tools (please include dwg files if you contact me).
Figure 36
37 . Turn off the visibility of all of the layers except the Helix layer and make it the active layer.
Figure 37
38 . Sweep the blue polyline rectangle along the helix and spiral paths. Experiment with the Helix tool to cre ate various helix/spiral curves.
Figure 38
39 . Turn off all layers except the Slice layer and make it the active layer. If you examine the entities you will find a solid and two lofted surfaces.
Figure 39
40 . Select the Slice tool and following the command prompts select the solid, then slice with Surface option, and finally the side of the solid to keep.
Figure 40
41 . Repeat Slice for the other side and place the surfaces on the Hidden Surfaces layer. With combinations of extruded, revolved, planar, swept, and lofted surfaces used as Split tools complex freeform solid shapes can be modeled in AutoCAD 2007.
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| figure 41 |
42 . I do not h a ve any uses for the Convert to Solids or Convert to Surfaces tools at this time.
Figure 42
43 . Turn off all layers except the Ctrl Select layers a nd make it the active layer.
Experiment with selecting faces, edges, or vertices while holding the Ctrl key and
then editing the shape.
Figure 43
44 . You can also Thicken many surfaces to solids. Go back to the surfaces created earlier and try using the Thicken command. Experiment with different distances
– both neg a tive and positive.
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| figure 44 |
45 . Check the Help files for new information on the following System Variables or
Commands:
delobj
3dalign vs align
solidhist legacyctrlpick
Shift + Spacebar cycle pick
To be continued..!
Source: https://chem-eng21.blogspot.com/2016/02/tutorial-autocad-2007-3d-modeling.html
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