Engineering 22
Working
Drawings-2
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22 – Engineering Design Graphics
1
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Standard Borders
 Almost All Engineering Firms Have Some
Standard/Default Elements That are
Included in all Engineering Drawings
 These Elements are incorporated into
Standard “Borders & Title-Blocks”
• When you First Go to Work for a Design
Firm find the standard “Border” or “Frame”
and make sure you understand the
meanings of the all the elements
Engineering 22 – Engineering Design Graphics
2
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Example of Std Border
Remember
This?
Engineering 22 – Engineering Design Graphics
3
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Anatomy of a Working Dwg
Rev. Block
Zone No.
Zone Ltr.
Note Block
Note Indicator
BoM BallTag
On-Dwg BoM
FOIA Disclaimer
Engineering 22 – Engineering Design Graphics
4
Title Block
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Anatomy of a Working Dwg
Zone Block
Section/View Line
Separate-Sheet
Parts List
Detail Bubble
Engineering 22 – Engineering Design Graphics
5
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Anatomy of a Title Block
 Drawing Title Block
 Drawing Number
 Release Block
 Revision Level
 Tolerance Block
 Dwg Sheet Size
 Matl-Spec Block
 Dwg Scale
 BoM Table Headings
 Company ID Block
 Dwg Sheet: No. & Cnt
 Co. Division ID
Engineering 22 – Engineering Design Graphics
6
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Zoning & Reving
Zone 7B (or B7)
Engineering 22 – Engineering Design Graphics
7
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Notes & Comments - 1
 Revisions Must be Carefully
Documented; Especially if they affect
• Form (physical Shape)
• Fit (mounting, or interface locations)
• Function (how it works)
 Zoning on Sections & Details is Optional
for 1 or 2 sheet drawings
 Rev’s should be Zoned UnLess
meaning is “obvious”
Engineering 22 – Engineering Design Graphics
8
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Notes & Comments - 2
 Show Parts & Assemblies
in their most “Natural”
Position as implied
by function or Mounting
 Part Number Formats Vary Widely
• Watkins-Johnson Co. →
– 967852 or 984377-003
• Olympus Japan → SS0251E0
• Dawn VME → 11-1011310-12
Engineering 22 – Engineering Design Graphics
9
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Drawing SCALE Interpretation
 Typical Scale CallOut
SCALE 1:16
Length On DRAWING
Length in REAL WORLD
• Example: Length In REAL WORLD = 73.75”
73.75 in RW
1 in DW G

 4.61 in DW G
16 in RW
Engineering 22 – Engineering Design Graphics
10
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Architect/CE Scale Example
 Recall Scale Definition
Size on
DRAWING
XY
Size in REAL
WORLD
 Example - Given Scale: 2” = 1’-0”
• Drawing Size →
6"DWG
Scaling UP Find
3'RW  0"RW
Engineering 22 – Engineering Design Graphics
11
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
mm Scale Example
 A Scale DOWN Example
• Given Scale: 1mm = 30mm
• Use TAPE MEASURE to Determine Real
World Size = 6810 mm (22.34 ft)
 Calculate Length of this Line on DWG
mmDW G
LDW G  LRW 
mmRW
1 mmDW G
LDW G  6810mmRW 
 227mmDW G
30 mmRW
Engineering 22 – Engineering Design Graphics
12
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Drawing SCALE Alternative
 Some Other Common Scale CallOuts
SCALE 1=10 or SCALE 1/4
Length On DRAWING
Length in REAL WORLD
 Watkins-Johnson
Engineering 22 – Engineering Design Graphics
13
 Olympus
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
The Std Chabot Engr Dwg Frame
Engineering 22 – Engineering Design Graphics
14
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Using The Drawing Frame
 The Chabot Engineering Drawing
Frame Should be used for Formal
Engineering Drawings
 The FRAME should be SCALED Up or
Down to fit the FULL SCALE Object
• i.e., the OBJECT is
Drawn at 1:1, then
the Frame-Border
is adjusted to fit
Engineering 22 – Engineering Design Graphics
15
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
1st vs. 3rd Angle Projection
Projection Box
Frontal Pln
Front V.
1st-Ang. Note Front Surface
is Projected BACKWARDS
Profile Pln
Lside V.
Horizontal Pln
Top V.
3rd Angle
USA, Asia
1st Angle
(Europe)
Engineering 22 – Engineering Design Graphics
16
1st Ang Proj
Horizontal Pln
Top V.
Profile Pln
Lside V.
Frontal Pln
Front V.
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
1St Angle Projection
 The USA Conventionally Uses the SoCalled “THIRD” Angle Projection
Produced by Unfolding the “Glass Box”
 The European “FIRST” Angle
Convention Essentially Projects the
SHADOW of An Object Projected Onto
a Screen BEHIND it.
 The 3rd Angle (USA type) Technique is
Much More Intuititive
Engineering 22 – Engineering Design Graphics
17
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
1st Angle Projection
 Note
• Rearward Projectors
• “Opposite” Positioning of the Views
Engineering 22 – Engineering Design Graphics
18
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Who’s on First, I-Don’t-Know’s
On Third (c.f. Abott & Costello)
FIRST Angle Proj
THIRD Angle Proj
“Third Angle Projection”
Symbol Appears in Almost
all Dwg Title Blocks
Engineering 22 – Engineering Design Graphics
19
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
1st & 3rd Angles Summarized
 In FIRST-ANGLE projection,
each view of the object is
projected in the direction
(sense) of sight of the object,
onto the interior walls of the
box
Engineering 22 – Engineering Design Graphics
20
 In THIRD-ANGLE projection,
each view of the object is
projected opposite to the
direction (sense) of sight,
onto the (transparent)
exterior walls of the box
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
All Done for Today
Projection
Quadrants
ReVealed
Engineering 22 – Engineering Design Graphics
21
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Engr/Math/Physics 25
Appendix
f x   2 x  7 x 
9x  6
3
2
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22 – Engineering Design Graphics
22
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Using Std Frame Demo - 1
1. Open Title Block
4. Zoom Out 0.3x
• Chabot_TitleBlock_ 5. Make Rectangle
D_BMayer_050909
around object
.DWG
6. EyeBall to see if
2. Save Std Border as
HEIGHT or WIDTH
• 987654will be Frame
321_Weld_Assy.D
Scaling Factor
WG
3. Open Design File
•
Example_Insert_int
o_DwgBorder_90661201.
DWG
Engineering 22 – Engineering Design Graphics
23
•
Choose WIDTH
6. Use DIST to
Measure Rectangle
Width at ≈ 91.5
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Using Std Frame Demo - 2
7. Zoom in On Border
8. Erase the
Unneeded Objects
& Notes
•
Leaves Clean
Border Template
9. Measure “Working
(open) Width” of
Border at ≈32
Engineering 22 – Engineering Design Graphics
24
10. Calc ScaleUp MIN
Factor at
•
91.5/32 =2.86
11. Allow 10% on Each
side for Working
ScaleUp Factor
•
•
2.86*1.2 = 3.43
Use 3.5
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Using Std Frame Demo - 3
12. ScaleUp Border by
3.5x using Bot-Rt
pt with NODE opt
13. Move Rect &
WeldFrame BlockContents to
Expanded Border
14. Erase Rectangle
15. Enter Object BoM
into Frame Bom
Engineering 22 – Engineering Design Graphics
25
•
•
Note that Obj BoM
is NOT Scaled
Same as Broder
This is a Good
Reason for Putting
BoM separate Sht
16. Copy (type) 4 items
from Ylw BoM into
Border BoM
•
Copy at least one
BoM Line
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Using Std Frame Demo - 4
17. Fill In Title Block
Using Double-Click
to Activate AttEdit
•
•
20. Move Border &
Contents to 0,0
•
Use Lower-Lt Node
p/n = 987654-321
Scale: 1 = 3.5
18. Fill in Rev Block
•
Show Rev.0 as
initial Release per
ECO 007536
19. Erase Unused Rev
Lines
Engineering 22 – Engineering Design Graphics
26
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
Demo Result
Engineering 22 – Engineering Design Graphics
27
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt
A Cool Assy
Engineering 22 – Engineering Design Graphics
28
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-23_Working_Drawings-2.ppt