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This tutorial will guide you how to create screw using AutoCad. One of the most common questions that comes up when beginners are learning AutoCAD 3D is how to create a cut thread. The new 3D modeling tools in AutoCAD 2007 allow you to model true helical paths that previously were not possible to model in AutoCAD. This tutorial assumes that the 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. Open the file named Tutorial 4 Threads.dwg. We are going to cut M10 x 1.5 threads. Check the Machinery’s Handbook for complete information on thread forms. Turn off all layers except the Rod Sketch and Rod Solid layers and make the Rod Solid layer the active layer. Revolve the Rod Sketch as shown. Turn on the External Threading Tool and Helix Path layers, Make the Helix Path layer the active layer. Select the Helix tool and then select the Center snap point of the end of the rod. (Tip: By selecting a circle center point we automatically set the z?axis perpendicular to the circle if DUCS is turned on.) And then track along the axis going a couple of turns beyond the end of the rod. (Tip: If your z?axis happens to be pointing in the wrong direction you can track the axis of the helix by pausing over the center of the start end and then tracking in desired direction of the axis.) If you are going to rapid prototype the part via an stl file you might want to make a copy of the thread cut shifted along the axis the desired clearance distance. Subtract the Sweep and make sure the rod is on the Rod Solid layer and turn off the other layers. Extrude the larger circle that is tangent to the hexagon with a taper of 45° (or 45°) beyond the length of the nut.

Tags : rapid prototype, snap point, threading tool, stl file, rod tip, 3d tools, polylines, modeling tools, ducs, splines, previous releases, dwg, wrong direction, helix, tutorial assumes that

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