1 blueprint reading for the machine trades, sixth edition unit 5: orthographic projection of...

1

Blueprint Reading for the Machine Trades, Sixth

Edition Unit 5: Orthographic Projection of Inclined Planes

Russ Schultz and Larry Smith

PowerPoint presentation created by LaVonne Vichlach

Schultz and Smith: Blueprint Reading for the Machine Trades, 6th edition

© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.2

Foreshortened Views Inclined angles

are at right angles to two of six principal views

Appears as an edge on those two views

Remaining views are foreshortened



Foreshortened Views Plane a appears as

edge in top and bottom views

Foreshortened in other four-twice visible and twice hidden

Always study adjacent views to determine true shape



Foreshortened Views Line “E” is created by the edge of principal

plane “V” Both surfaces in the right hand view

represent the true shape



Foreshortened Views Line “I” is created by the intersection of

inclined plane “W” and the principal plane “X” The right hand view represents one

foreshortened and one true shape



Foreshortened Views No line is created when curved surface “Y”

runs tangent with the principal plane “Z” Combines foreshortening and true shape



Surface Identification 4E: Edge view of surface

I: Intersection of surfaces

F: Foreshortened surface

T: True shape

Identify the condition for circle #1.

T






T: True shape


E






T: True shape


T






T: True shape


E






T: True shape


T






T: True shape


E






T: True shape


T






T: True shape


F






T: True shape


I






T: True shape


E






T: True shape


T






T: True shape


E






T: True shape


I






T: True shape


F






T: True shape


T



Enter the letters into the balloons.

AB

C

D EFG H D

J

J

K

L

L

L

M

N

A

Surface Identification 5



Place the letters from the pictorial views onto their respective surfaces in the orthographic views.




A B

DB

C





EC

B

D

A D





CB

DAC





F

B

DA

CHG

E





F

B D

AC

E

C





B

B

DA

C

E





B

B

D

A

CE E





Angular Dimensions Inclined planes dimensioned two ways

Coordinate method Angular method

Angular method uses one linear and one angular dimension-allows variation to increase with distance from vertex

Coordinate controls accuracy more than angular



Angular Dimensions Most angular

dimensions held from vertical or horizontal centerline

Easy to calculate other angle from 90

All triangles have 180



Angular Dimensions Right triangle

always has 90 angle

Other two angles add up to 90

180 total in triangle



Angular Dimensions Isosceles triangle

has 2 sides equal Two angles are

also equal



Angular Dimensions Equilateral

triangle has three equal sides

Also has three equal angles



Angular Dimensions



1. Are the inclined planes dimensioned by the coordinate method or the angular method?Angula

r

Angular Block



2. What is the tolerance assigned to the angular dimensions?

030’

Angular Block



3. What is the tolerance on the liner dimensions?

.020

Angular Block



4. What type of line was drawn on the front and the top views to permit them to be shortened?Long

Break

Angular Block



5. How many hidden lines would appear on a bottom view?

1

Angular Block



6. How many hidden lines would appear on a left side view?

0

Angular Block



7. How many inclined planes does the object contain?

2

Angular Block



8. How many principal planes does the object contain?

8

Angular Block



9. How much tolerance accumulates with dimension “A?”

.04

Angular Block



10. What is the MMC of the overall height?

1.32

Angular Block



Enter the dimension for the letter “A.”

.60

Angular Block



Enter the dimension for the letter “B.”

.60

Angular Block



Enter the dimension for the letter “C.”

.70

Angular Block



Enter the dimension for the letter “D.”

.50

Angular Block



Enter the dimension for the letter “E.”

1.20

Angular Block



Enter the dimension for the letter “F.”

.60

Angular Block



Enter the dimension for the letter “G.”

45

Angular Block



Enter the dimension for the letter “H.”

.80

Angular Block



Enter the dimension for the letter “I.”

.20

Angular Block



Enter the dimension for the letter “J.”

135

Angular Block



1. IS

Enter the appropriate letters to describe the surfaces using:

PS: For principal surface

IS: For inclined surface

CS: For curved surface2. PS

3. PS

4. IS




5. IS




CS: For curved surface6. PS

7. IS

8. PS




9. PS




CS: For curved surface10. CS

11. PS

12. CS




13. CS




CS: For curved surface14. IS

15. CS

16. IS




17. CS





19. CS

20. PS




21. PS





23. PS

24. IS




90

Three sets of parallel lines-calculate the correct angle for each of the following letters:

A

Angular Calculations 1



180


B




40


C




50


D




40


E




130


F




140


G




230


H




220


I




320


J




50

Based on the 40 angular dimensions (NTS) found on the top view, calculate the angular dimensions for the following letters:

A




40


B




50


C




40


D




50


E




40


F




40


G




100


H




Included Angle Included angle is

angular measurement taken From one surface to

another Across a conical shape Always less than 180°

Drill points and countersinks commonly dimensioned by included angles



130

Calculate the angles using the objects to the left.

1. Included angle between A and B:




140

Calculate the angles using the objects to the left.

2. Included angle between A and C.




40

Calculate the angles using the objects to the right.

3. Included angle between A and D.




125


4. Angle “E”




55


5. Angle “F”




35


6. Angle “G”




42


7. Angle “H”




47 45’


8. Angle “I”




47


9. Angle “J”




91


10. Angle “K”




Circle the letter that identifies the correct orthographic view for each of the pictorial views shown.

View Selection 5



View Selection 5




Add the missing lines to the top and/or right side views only. Include the hidden lines.

Missing Lines 1




Missing Lines 1



Slots And Grooves

Dovetail slots & tee slots (T-slots)-common used to produce reciprocating movement

E.G.-cross feed on a lathe Depth always measured

from surface from which it is cut

Profile view is most descriptive-shows depth and width



Slots And Grooves

Length of slot is distance over which it extends for function

Included angle of dovetail slot or vee groove is the angle between the two sides



Slots And Grooves

V-grooves and slots are machined with one tool

Dovetails and T-Slots require two operations Machine primary

opening Finish form tool



Refer to the two views above, then enter the appropriate dimensions in the table provided.

.35 .40 .70

.60 .30 1.40

.95 .45 2.10

.65 .55 2.80

Groove & Slot Exercise



1. What is the overall height of the block?

2.50

Sliding Tool Block

Sliding Tool Block



2. What is the depth of the block?

2.00

Sliding Tool Block



3. What is the depth of the vee groove?

.75

Sliding Tool Block



4. What is the depth of the dovetail slot?

.25

Sliding Tool Block



5. What is the width of the vee groove?

1.50

Sliding Tool Block



6. What is the length of the dovetail slot?

2.50

Sliding Tool Block



7. What is the length of the vee groove?

1.00

Sliding Tool Block



8. What is the included angle of the vee groove?

90°

Sliding Tool Block



9. What is the included angle of the dovetail slot?

60°

Sliding Tool Block



10. What view shows the profile of the vee groove?

Front

Sliding Tool Block



11. What view shows the profile of the dovetail slot?

Right-side

Sliding Tool Block



12. How many inclined surfaces does the block contain?

4

Sliding Tool Block



13. How much tolerance accumulates with dimension “A”?

±.03

Sliding Tool Block



Enter the dimension for the letter “A”

.50

Sliding Tool Block



Enter the dimension for the letter “B”

.25

Sliding Tool Block



Enter the dimension for the letter “C”

1.25

Sliding Tool Block



Enter the dimension for the letter “D”

.25

Sliding Tool Block



Enter the dimension for the letter “E”

2.00

Sliding Tool Block



Enter the dimension for the letter “F”

1.00

Sliding Tool Block



Enter the dimension for the letter “G”

.50

Sliding Tool Block



Place the letters from the front views into their positions in the top view for #1.

A

B

C




A

B

C

DPlace the letters from the front views into their positions in the top view for #2.




A

B

C

DPlace the letters from the front views into their positions in the top view for #3.




A

B

C

D

E





A

B

C

D

E

FPlace the letters from the front views into their positions in the top view for #6.




A

B

C

D

E

FPlace the letters from the front views into their positions in the top view for #7.




Refer to the drawing to determine the values for the angular dimensions for each letter.

A=120°




B=135°

C=125°





D=56°

E=16°





F=90°

G=66°





H=99°

I=100°J=40°





K=89°

L=28°M=14°





1. What is the tolerance on the height dimension?

±.01

Angular Base



2. What is the MMC of the 3.812 dimension?

3.817

Angular Base



3. How many inclined planes does the object contain?

4

Angular Base



4. What angle is the bottom of the base from vertical?

81°30’

Angular Base



5. What angle is the 28°47’ surface from vertical?

61°13’

Angular Base



6. What is the maximum angular dimension for the 28°47’ surface? (Include the tolerance in your answer.)

29°17’

Angular Base



7. What is the included angle between the two bottom inclined surfaces? (See balloon 7.)

163°

Angular Base



8. What is the included angle between the two top inclined surfaces? (See balloon 8.)

106° 13’

Angular Base



9. How many lines in the side view represent intersections of surfaces only, not edges?

3

Angular Base



10. How many lines in the top view represent intersections of surfaces only, not edges?

7

Angular Base



Enter the dimensions for the letter

.56

A

Angular Base



.58


B



.11


C

Angular Base



.33


D

Angular Base



.22


E

Angular Base



.78


F

Angular Base



1.07


G

Angular Base



1.906


H

Angular Base



1.00


I

Angular Base



.85


J

Angular Base



Circle the letter that represents the correct right side view the the shape shown

View Selection B



View Selection B




Add the missing lines to complete the view. Include all hidden lines.

Missing Lines 2



Missing Lines 2




View Selection 7

Select the correct orthographic view to correspond with the arrowhead for each pictorial view shown.



View Selection 7




View Selection 8

Each balloon represents the position of a missing view. Select the correct view.



View Selection 8




1. What is the length of the tee slot?

3.48

Tool Slide



2. What is the depth of the dovetail slot?

.32

Tool Slide



3. What is the length of the dovetail slot?

1.10

Tool Slide



4. How much tolerance can accumulate in the full depth of the tee slot?

±.020

Tool Slide



5. How many inclined surfaces does the tool slide contain?

6

Tool Slide



6. What angle is created between the two sides of the dovetail slot?70°

Tool Slide



7. What angle is created between the two outside edges in the top view?

40°

Tool Slide



8. What is the MMC of the overall depth of the tool slide? (Top and right side views.)1.00

Tool Slide



9. What is the MMC of the drilled holes? (Observe separate tolerance for drilled holes.)

.248

Tool Slide



10. How many lines (include hidden) in the front view represent surface intersections only, not edges?

12

Tool Slide



What is the dimension for the letter

40°

A

Tool Slide




80°

B




50°

C

Tool Slide




35°

D

Tool Slide




.52

E

Tool Slide




.46

F

Tool Slide




.10

G

Tool Slide




.58

H

Tool Slide




.30

I

Tool Slide




.58

J

Tool Slide



Sketch additional shapes that would correspond with the orthographic views shown to the left.

Similar View Sketches



Add the missing right-sides view to each of the objects shown above.

Missing View 3




Missing View 3



The front side and right-side views are complete, with no missing lines. Can you solve the top view?

Brain Teaser




Brain Teaser

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