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Unformatted text preview: INSTRUCTION SHEET: U EML 2023
GEOMETRIC CONSTRUCTION OF A3. 1 a
F CAD Fig. 1. Arc of radius R,
tangent to two circles of radius R1 and R2 RL1 is the radius of the locus of all circles of radius R that are tangent to R1.
RL2 Ie the radlue of the locus of all clrclee of radlue R that are tangent to R2. Fig. 2. Circle of radius R3 tangent to an arc
of radius R, and tangent to a line. RL1 ie the radius of the locus of all circles of radius R that are tangent to R1. .... RL2 is the radius of the locus of all circles of radius R that are tangent to R2. “a Fig. 3. Arc of radius R tangent to two circles
of radius R1 and R2. INSTRUCTION SHEET: U EML 2023 OTHER 1 b
GEOMETRIC CONSTRUCTIONS 0F °
F CAD TRIANGU LATION Given 3 lines A, B, C.
Construct a Triangle 1 C 2 A B
whose sides equal A, B. C.
At point 1. swing arc of length A
At point 2, swing arc of length B DRAW A LINE PARALLEL TO A LINE
R1 1
Given Line B, Construct line A M
parallel to line B. A Swing arcs R1 and R2 from
both ends of B. R1 R1
DRAW A LINE PERPENDICULAR TO A LINE
B
Given: Line A 1 A 2
Construct a Line B that is
perpendicular to Line A
and bisects Line A.
swung equal arcs R1 from ends 1, 2 R2 R1 R1 BISECT AN ANGLE Given: Line A and Line B
of equal length.
Construct Line C to
bisect the angle between R2
Line A and Line B. Draw any are R1.
Swing equal arcs R2 to bisect. DRAW A LINE TANGENT TO ARC Given: Arc B with center at O.
and point P. Construct a line thru P that is
tangent to arc B. PT = POINT OF TANGENC‘ \. P TITLE:
DATE: SNAP RING
1090 STEEL 319$ 5":FS"!°." NS” _ U EML 2023 oF 3F CAD DRAW THE SNAP RING FULL SIZE. Dims are in MM.
DIMENSION THE SNAP RING. DUPLICATE THE DIMENSIONING SHOWN AT LEFI'.
SHOW CENTERLINES FOR ALL ARCS. SHOW CONSTRUCTION ARCS RLA, RLB, RLC, RLD.
REQUIRED TO FIND THE CENTERS OF THE
TANGENT ARCS R12.7 AND R101.6. LOCATE AND LABEL ALL POINTS OF TANGENCY. ADD A GENERAL TOLERANCE NOTE.
THE CENTER OF ¢88.9 IS GIVEN BELOW. I SECT.I EML 2023 . U
'NSTRUCT'ON SHEET SECTIONS and Symbols <3_F CAD Types of Sections Section Jargon Comparison of Views
SECTION LINING FULL SECT'ON CROSS—HATCHING OFFSET SECTION HATCHING BROKEN—OUT SECTION ALIGNED SECTION ASSEMBLY SECTION ,
REVOLVED SECTION MAT '‘ BRASS
REVOLVED and REMOVED SECTION HALF SECTION PHANTOM SECTION II" CONVENTIONAL BREAK PARTIAL VIEW L'— T,
NO SECTION : I : Sectioning Symbols “3'31 $5333?» A
ANSI32 m Steel
m k CUTTING PLANE / ANSI33 Copper Alloys
(Brass, Bronze) Aluminum FULL SECTION Spacing and Direction
of Hatching 75' A
.06 to .12 Typ
CUTTING PLANE/ 45' Typ 15' HALF SECTION EML 2023 SECTIONS and Conventions
...EXAMPLES... A3°2b INSTRUCTION SHEET: (3% NOTE RIB: Thin members
FULL SECTION are not sectiond SECTION A—A 3. CAST IRON 4. CONVENTIONAL BREAKS IN SOLID & HOLLOW
BRONZE CYLINDERS. I". (.I
FULL SECTION I A
9' SECTION 3—3 N \\\\\\\\\\\V
s\\\\\\\\\\\\\\\\\\V §
%
§
§
\\\\\\\\\\\\‘ V k\\\\\
% EML 202.3 SECTIONS and Conventions U
...EXAMPLES... 0F F CAD INSTRUCTION SHEET: 1. HALF SECTION with ALTERNATE SECTIONING Alternate
Sectioning \\\\\w R
E. V
\Li‘
W MATERIAL: STEEL
2. REVOLVED and REMOVED SECTION THRU, 3 HOLES
MATERIAL: CAST IRON PART 1 is a CAST IRON Stepped Cylinder
PART 2 is a STEEL Spacer.
PART 3 is a BRONZE Sleeve. SECTION A— A 4. BROKEN OUT SECTION
3. ALIGNED SECTION of a Crank Arm of an Assembly NAME:I : U EM" 2°23
0F
SIGC I SECT.I I F CAD 1. Draw on OFFSET SECTION view of the STEEL MOUNT. Draw the
proper SECTION LINE in the top view. and complete both views.
NOTE: 3 THRU HOLES 2. Complete the BROKEN OUT section view of the
CAST IRON SLEEVE. BREAK—OUT THIS SIDE —\ NAMES : U EM" 2°23
0F
SIG:I I SECT. I I F CAD 1. Complete the Front view as o
HALF SECTION a 2. Show only the exterior of the
i object in the un—sectioned portion.
MAT’L: CAST IRON 2. Draw a REVOLVED Section of the webbed
MOTOR MOUNT (CAST IRON) ...
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 Spring '10
 Chung
 Line C, radius R1, r2 r1 r1, m Steel

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