WEEK 11
11.0 ENGINEERING DRAWING ANALYSIS
The goal of engineering drawing is to identify the contents and elements and
understand the details of the parts and objects drawn, in addition to any suggestions
and modifications to be added.
11.1
Solved Example (1)
The figure below (Fig. 11) shows the two views of a cylinder cover, study the
drawing carefully then answer the below questions.
Fig. 11
No
1
2
3
4
5
6
11.2
Answer
Questions
For what purpose this cover is used?
What is the pitch circle diameter of (p 10 mm,
8 holes?
What is the angle between any two adjacent
holes
What is the thickness of the cover?
What is the diameter of the dotted
lines.
Why are the holes located radially?
To close the cylinder
90 mm
45
10 mm ,8 mm
70 mm
Because the cover is circle
Solved Example (2)
The figure below (Fig. 11.1) shows details of a screw jack, study the drawing
carefully then answer the below questions.
Fig. 11.1
Question
Answer
M: Metric thread
16: Nominal diameter
2: thread pitch
1
What is meant by M 16 x 2
2
What is the maximum diameter of part No. (1)?
50 mm
3
What is the total length (X)?
87 mm
4
What is meant by U/Cut 5 x 2 in the bolt view ?
5
What is the shape of the material used inside?
6
What is meant by 2 / 45 °
7
Name the internal machining operations.
It means chamfer operation 2 mm
length & 45° angle
drilling , boring, threading, counter
bore, counter-sink.
8
Name the external machining operations.
parallel turning, taper, u/cut,
threading, knurling.
11.3
It means under-cut with 5 mm
width & 2 mm depth.
Round bar Ø55 mm
QUIZ SHEET 3
1) The figure below Fig. (11.2) Shows the details of C-Clamp study the views
carefully and answer the questions below.
Fig. 11.2
Question
Answer
1
What is the maximum length of the clamped work
piece?
2
What is the section of part No. 1 at X-X?
3
What is the angle of projection of part No. 3 &
No. 4?
4
Why is the type of fit between part No. 1 & No. 4?
5
What is the purpose of hole q> 6 in part No. 2?
6
What is the material required for each part ?
7
Is the true shape of surface a shown on the drawing
? If your answer NO how can you get the true
shape?
The figure below Fig. (11.3) shows the details of a screw jack, study the views
carefully and answer the questions below
Fig. 11.3
Question
1
What is the purpose of the four grooves in the cup?
2
How can we clamp the screw to drilling hole Ø 12?
3
What is the minimum diameter of the handle that
turns the screw?
4
Why is there a gap of 3 mm at bottom of the base?
5
What is the total length of the Nut
Answer