66 Machine Drawing
dharm
d:\N-Design\Des4-1.pm5 Seventh Print
X
X
X–X
Auxiliary viewshows the half sectional view from the front. It may be noted that a centre line is used to separate
the halves of the half section. Students are also advised to note the representation of the cutting
plane in the view from above, for obtaining the half sectional view from the front.
(a) (b)(c)Fig. 4.4 Method of obtaining half sectional view4.4 Auxiliary Sections
Auxiliary sections may be used to supplement the
principal views used in orthographic projections. A
sectional view projected on an auxiliary plane,
inclined to the principal planes of projection, shows
the cross-sectional shapes of features such as arms,
ribs and so on. In Fig. 4.5, auxiliary cutting plane
X-X is used to obtain the auxiliary section X-X.
Fig. 4.5 Auxiliary section