Machine Drawing

Welded Joints 173

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d:\N-Design\Des11-1.pm5

110

Drill after

welding

8

Z6

8

Z6

(^15121215)
Z6 Z6

3

2

1

55

12

R20

f 30

f 20

55 4

R12

Z6 Z6

f 12

Z6 Z6

6

10

6080

(c)

Fig. 11.13 Shaft support

THEORY QUESTIONS

11.1 What is welding and what type of fastesning is it?
11.2 What are the advantages of welding over riveting?
11.3 What are the materials that can be joined by welding?
11.4 By what means, the location of a weld is specified?
11.5 Categorise the welding symbols.
11.6 How is a weld shown on the drawing?
11.7 Explain the meaning of ‘‘arrowside’’ and ‘‘other-side’’, with reference to welded joints.
11.8 Why the edges of various parts to be welded are prepared?
11.9 What are the important rules to be observed while applying weld symbols?
11.10 Give the welding process abbreviations, for the following:
(a) Explosion welding,
(b) Electro-slag welding,
(c) Forge welding, and
(d) Oxy-acetylene welding.
11.11 Explain the following welding process symbols:
(a) CAW (b) GMAW
(c) GTAW (d) OAW
(e) EBW (e) RW

DRAWING EXERCISES

11.1 Through sketches, indicate the various types of welding joints.

11.2 Sketch and explain the two conventional signs used for welding as per BIS.

11.3 Sketch the following welding symbols along with the respective illustrations:

(a) Single V-butt weld,

(b) Single bevel butt weld,