Engineering Design and Presentation Solid Modeling Solid Modeling Drawing UNT in partnership with TEA, Copyright ©. All rights reserved. Copyright © Texas Education Agency, All rights reserved.

Lesson Objectives Students will construct a solid modeling drawing using system software (CAD) that can draw in three dimensions (width, height, and depth). –Define terms associated with lesson –Define CAD terms – solids and 2-D associative –Identify solid modeling tools –Identify views and 2-D associative parametric parts and where to find the missing 3-D part –Identify and use shapes to add a third dimension to make a solid associative of the parametric object –Follow storyboard to complete solid modeling drawing Copyright © Texas Education Agency, All rights reserved.

Preparation System software (CAD) with necessary features: 1. draw in three dimensions (width, height, and depth) 2. command - for geometry 3. generators - to control the viewing of drawing geometry 4. modifiers - for changing the drawing 5. editor - for editing and variations NOTE: Solid modeling is unlike a two dimensional drawing that draws a series of two drawings to show all its features. Software is becoming more user friendly and subject to the way drafting was first derived. Copyright © Texas Education Agency, All rights reserved.

STORYBOARD 1. Start with these four, three view drawings – Part 1, 2, 3, 4, and project all points around to show alignment of one object. 2. Part 1 – Outline the front view with a polyline. Extrude (.75) inches to finish. Why front view? Because it shows the most of the object in solid form and all we had to do was to add depth onto the object. The width And height already exist in front view. Just add depth as shown (.75). 3. Part 2 - Select the view or part of the object that has one process to turn it into a solid. In front view, choose number 1 outlined in green, polyline the green part, (all the same depth) and extrude it 1 inch. (Move it to the right.) Copyright © Texas Education Agency, All rights reserved.

STORYBOARD 4. Part 2 - From the top choose number 2 and outline with a polyline, extrude it (1.5) inches by placing the height onto the depth. Move it, align it to midpoint, and union it to form one part. 5. Part 3 - What view would you pick to turn this drawing into a parametric solid? (front view) Outline front view with a polyline, extrude 1 inch. Is part 3 finished? (yes) 6. Part 4 – What part best describes this object? (1 of right side view) The command you would use is extrude. What second best part would you pick? ( 2 of right side view) Then also extrude. Now move number 1 to midpoint of number 2 midpoint and union, as shown in slide 10. Use dimensions as given. Copyright © Texas Education Agency, All rights reserved.

Drawing 1 Start with these four, three-view drawings – Parts 1, 2, 3, 4 below and project all points around to show alignment of one object. Copyright © Texas Education Agency, All rights reserved.

Part 1 - Extrude front view (.75) inches to finish. Why front view ? Because it shows the most of the object in solid format, and all I had to do was to add depth onto the object. The width and height already exist. With width and height given in front view just add depth as shown (.75). Copyright © Texas Education Agency, All rights reserved.

Part 2 - From the top choose this part and with a polyline extrude it (1.5) inches by placing the height onto the depth. Move it, align it to midpoint, and union it to form one part. Copyright © Texas Education Agency, All rights reserved.

Part 3 - What view would you pick to turn this drawing into a parametric solid? (front view) Copyright © Texas Education Agency, All rights reserved.

Part 4 - What part best describes this object? (1 of right side view) The command you use is extrude. What second best part would you pick? (2 of right side view) Then also extrude. Now move number 1 to midpoint of number 2 midpoint and union. Copyright © Texas Education Agency, All rights reserved.

Parts 1- 4 extruded & colored Copyright © Texas Education Agency, All rights reserved.

Drawing 2 See if you can turn these three-view drawings into solids. Copyright © Texas Education Agency, All rights reserved.

Drawing 2 Lets start with top view (shows most overall shape). Extrude up (.48) inch and place in two (.25) inch holes and subtract out the space. Place to side. Extrude back part (2.13) inches. Move to side. Extrude part 3 back (1.50) of a inch, and move to side. Rotate part 2 and part 3 parallel to part 1 position and stack them on top to finish object, as shown in part 5. Copyright © Texas Education Agency, All rights reserved.

Drawing 2 as Solid Model Copyright © Texas Education Agency, All rights reserved.

Drawing 3 – three-view Copy all drawings and insert into CAD, then shade these to get better picture. Copyright © Texas Education Agency, All rights reserved.

Drawing 3 Three parts - red trace in a polyline for the overall shape and extrude down (.50) inches. Second, place in a (.25) hole and subtract out hole. Yellow draw in with a polyline for its overall shape and extrude it (.50) of a inch. Part magenta polyline in over shape and extrude back (.75). Place in red parallel top of yellow (as shown) place in magenta to the midpoint of yellow (as shown) and move to right side. Copyright © Texas Education Agency, All rights reserved.

Drawing 3 as Solid Model Copyright © Texas Education Agency, All rights reserved.

Drawing 4 Copyright © Texas Education Agency, All rights reserved.

Drawing 4 as Solid Model Copyright © Texas Education Agency, All rights reserved.

Drawing 5 Copyright © Texas Education Agency, All rights reserved.

Drawing 5 as Solid Model Copyright © Texas Education Agency, All rights reserved.

Apply Parametric Modeling To Your Own Drawing Copyright © Texas Education Agency, All rights reserved.