PROBLEM 1 : A pentagonal prism , 30 mm base side & 50 mm axis is standing on Hp on it’s base whose one side is perpendicular to Vp. It is cut by a section plane 450 inclined to Hp, through mid point of axis. Draw Fv, sec.Tv & sec. Side view. Draw development of surface of remaining solid. here to edit.
Construction
For sectional views :
Step 1 . Draw three views of standing prism.
Step 2 . Locate sec.plane in Fv as described.
Step 3 . Project points where edges are getting Cut on Tv & Sv as shown in illustration.
Step 4 . Join those points in sequence and show Section lines in it.
Step 5 . Make remaining part of solid dark.
For Development : Draw development of entire solid. Name from cut-open edge i.e. A. in sequence as shown. Mark the cut points on respective edges. Join them in sequence in st. lines. Make existing parts dev.dark.
For sectional views :
Step 1 . Draw three views of standing prism.
Step 2 . Locate sec.plane in Fv as described.
Step 3 . Project points where edges are getting Cut on Tv & Sv as shown in illustration.
Step 4 . Join those points in sequence and show Section lines in it.
Step 5 . Make remaining part of solid dark.
For Development : Draw development of entire solid. Name from cut-open edge i.e. A. in sequence as shown. Mark the cut points on respective edges. Join them in sequence in st. lines. Make existing parts dev.dark.
PROBLEM 2 : A cone, 50 mm base diameter and 70 mm axis is standing on it’s base on Hp. It cut by a section plane 450 inclined to Hp through base end of end generator.Draw projections, sectional views, true shape of section and development of surfaces of remaining solid.
Construction
For sectional views :
Step 1 . Draw three views of standing cone.
Step 2 . Locate sec.plane in Fv as described.
Step 3 . Project points where generators are getting Cut on Tv & Sv as shown in illustration.
Step 4 . Join those points in sequence and show Section lines in it.
Step 5 . Make remaining part of solid dark.
For Development :
Draw development of entire solid. Name from cut-open edge i.e. A. in sequence as shown. Mark the cut points on respective edges. Join them in sequence in curvature. Make existing parts dev.dark.
For sectional views :
Step 1 . Draw three views of standing cone.
Step 2 . Locate sec.plane in Fv as described.
Step 3 . Project points where generators are getting Cut on Tv & Sv as shown in illustration.
Step 4 . Join those points in sequence and show Section lines in it.
Step 5 . Make remaining part of solid dark.
For Development :
Draw development of entire solid. Name from cut-open edge i.e. A. in sequence as shown. Mark the cut points on respective edges. Join them in sequence in curvature. Make existing parts dev.dark.