engineering design and presentation solid modeling solid modeling drawing unt in partnership with...

Engineering Design and Presentation

Solid Modeling

Solid Modeling Drawing

UNT in partnership with TEA, Copyright © . All rights reserved.

UNT in partnership with TEA. Copyright ©. 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


Preparation

System software (CAD) with necessary features: 1. draw in three dimensions (width, height, and depth) 2. command - for geometry3. generators - to control the viewing of drawing geometry4. modifiers - for changing the drawing5. 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.


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.)


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, extrude1 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.UNT in partnership with TEA. Copyright ©. All rights reserved.

Drawing 1Start with these four, three-view drawings – Parts 1, 2, 3, 4 below and

project all points around to show alignment of one object.


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).

TOP

FRONT RT. SIDE

EXTRUDE FRONT VIEW .75 INCHES TO FINISH.WHY FRONT VIEW? BECAUSE IT SHOWS THEMOST OF OBJECT IN SOLID FORMAT, AND ALL IHAD TO DO WAS TO ADD DEPTH ONTO THEOBJECT THAT ALREADY HAD WIDTH & HEIGHT.

0.75

0.75TOP

FRONT RT. SIDEWIDTH

DE

PT

H

TO FINISH OBJECT PLACE DEPTH ONTO THE WIDTH AND HEIGHT ALREADYGIVEN IN FRONT VIEW.


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.

TOP

FRONT RT. SIDE

1

2From the top choose this part and with apolyline line extrude it 1.5 inches byplacing the height on depth

Move it, align it tomidpoint and unionit to form one part.

You can do this many ways


Part 3 - What view would you pick to turn this drawing into a parametric solid? (front view)

TOP

FRONT RT. SIDE

1.00

1.00 1.00

2.50

1.00

Part 3 - What view would you pick to make a parametric solid? .You only need one move. Hint - place the height onto thewidth.


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.

FRONT

TOP

RT. SIDE

PART 4 What 2 Parts would best describe the object?The command you would use is extrude. What secondpart would you pick? Then also extrude. Now move tomidpoint and union it.

If you picked 1 and 2 you are right.

1

2

0.50

2.00

1.50

1.00


Parts 1- 4 extruded & colored


Drawing 2 See if you can turn these three-view drawings into solids.


Drawing 2Lets 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.


Drawing 2 as Solid Model


Drawing 3 – three-view Copy all drawings and insert into CAD, then shade these to get better picture.


Drawing 3Three 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.


Drawing 4


Drawing 5


Apply Parametric Modeling To Your Own Drawing


engineering design and presentation solid modeling solid modeling drawing unt in partnership with...

Documents

view outline

view drawings parts

solid format

dimensions width

dimensional drawing

midpoint of number

d associative parametric

viewing of drawing geometry4