3D AutoCAD 2010 for Starters and Others. . .
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3D AutoCAD 2010 for Starters and Others. . .
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Saturday January 02, 2010
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Swing Arm Construct the Swing Arm model as displayed in Figure1. Use proper drawing setup with layers, dimension style and text styles and use viewports wherever possible. Prepare a plan how to construct the swing model. Save the drawing as Swing Arm.
To construct this model, apply the following plan or prepare your own plan.
Start with two box primitives. Create one box 60x130x85 and then create another box 20x130x70 inside the first box and subtracted this box from the first box to create the lip with the two mounting holes on the top left side of the swing. Use the DUCS on the top of the box and place the two mounting holes and then select PRESSPULL to create the holes.
Create the center cutout of the swing using two different diameter (110/30 & 100/30) CYLINDERS placed on the top surface and then extruded downwards to different depths. Use SUBTRACT to remove the cylinders to create the cavities.
Create the lip around the 30 diameter swing arm bore hole at the bottom. Use the CYLINDER command for the raised lip. Use PRESSPULL for the hole, and the FILLET command for the lip rounding. The bore hole CHAMFER can be constructed either using the CHAMFER command or placing a CONE..
Figure 1 Completed the swing arm model in SE Isometric view with dimensions. Create the base plate extension on the right next. The rounded portion with the sloped surface may be best created by extruding separate pieces and then moving them into place using the ALIGN command. Once in place, use the UNION command to integrate the pieces.
Figure 2 Placing appropriate construction lines help constructing sub-objects.
Figure 3 Viewport display allows verification of the construction progress and proper placement of sub-objects.
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