• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
AUXILIARY   VIEWS - 14069_167
USE OF REVOLUTIONS

Engineering Aid 3 - Beginning Structural engineering guide book
Page Navigation
  140    141    142    143    144  145  146    147    148    149    150  
Figure 5-25.-Projection of rear auxiliary view. Using  the  procedures  previously  described, follow the steps taken to project and draw the rear auxiliary view in figure 5-25. Sometimes  the  total  auxiliary  view  is  not needed.  Such  a  view  could  possibly  even  make  the drawing   confusing.   In   this   case,   a   PARTIAL AUXILIARY  VIEW  is  used.  Only  the  points  or lines needed to project the line or surface desired are used. This reduces the number of projection lines  and  greatly  enhances  the  clarity  of  the  view. If a partial auxiliary view is used, then it must be labeled  PARTIAL  to  avoid  confusion.  In  figure 5-24, if only the true length of line AB is desired, the   points   A   and   B   would   be   projected   and connected.  The  view  would  be  complete  after  it was  labeled  and  dimensioned. In  some  cases  the  shape  of  an  object  will be  such  that  neither  the  normal  orthographic view  nor  the  auxiliary  views  will  show  the true  size  and  shape  of  a  surface.  When  this occurs,  a  SECONDARY  AUXILIARY  VIEW  is needed  to  describe  the  surface.  The  procedures for projecting and drawing a secondary auxiliary view  are  the  same  as  those  for  a  normal  (or primary) auxiliary view. The reference plane for a   secondary   auxiliary   view   is   located   in   the orthographic  view    from   which   the   primary auxiliary view is projected. Usually, the primary auxiliary plane becomes the secondary reference plane.  The  secondary  auxiliary  plane  is  in  the primary   auxiliary   view,   and   its   location   is determined in the same manner that the primary auxiliary plane is determined. AUXILIARY SECTION.—  An  auxiliary  view maybe  a  sectional,  rather  than  a  surface,  view. In  the  upper  left  part  of  figure  5-26,  there  is  a single-view  projection  of  a  block.  It  is  desired to  show  the  right  side  of  the  block  as  it  would appear if the block were cut away on the plane indicated  by  the  dotted  line,  the  angle  of observation  to  be  perpendicular  to  this  plane.  The desired  view  of  the  right  side  is  shown  in  the auxiliary section, which is projected from a front view  as  shown.  Because  the  auxiliary  plane  of projection  is  parallel  to  the  cutaway  surfaces, these surfaces appear in true dimensions in the auxiliary  section. A  regular  multi-view  of  an  orthographic drawing  is  one  that  is  projected  on  one  of  the 5-16







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.