PROCEDURE:
1. DRAW THE DISPLACEMENT DIAGRAM
DRAW THE DIAGRAM WITH THE SCALE
PROVIDED
DISPLACEMENT DIAGRAM
INLINE ROLLER FOLLOWER
2. DRAW EACH SEGMENT OF THE MOTION
SEGMENT 1: RISE TO LIFT OF 2CM IN 60°
DIVIDE SEGMENT 1 INTO 6 EQUAL DIVISIONS.
DRAW STRAIGHT LINE FROM INITIAL TO FINAL
POINT OF THE SEGMENT 1 TO CONSTRUCT THE
CONSTANT VELOCITY RISE. THEN LABEL POINTS
OF INTERSECTION BY "a" TO "g".
g
f
e
SEGMENT 2: DWELL OF 1CM IN 30°
DRAW STRAIGHT HORIZONTAL LINE FROM
LAST POSITION TO THE FINAL POINT OF THE
SEGMENT. SAME LABEL THE INTERSECTION "g"
TO ENDPOINT.
d
4. TRANSLATE THE DISPLACEMENT INTO THE
CAM PROFILE.
a. DRAW THE ROLLER FOLLOWER PARALLEL
TO THE Y-AXIS OF DISPLACEMENT DIAGRAM.
b. DRAW VERTICAL LINE PASSING THROUGH
IT AND THE CENTER OF CAM CENTER.
c. PROJECT EACH POINT OF THE
DISPLACEMENT TO THE VERTICAL LINE AND
EXTEND IT USING ARCS CONCENTRIC TO THE
BASE CIRCLE .
d. TRANSLATE EACH POINT IN THE VERTICAL
LINE TO THE CORRESPONDING ANGULAR
DIVISION MADE IN THE BASE CIRCLE.
e. LABEL EACH POINT WITH THE LABELS USED
IN THE DISPLACEMENT DIAGRAM
b
h
i
j
40mm
k
l
b
a
m
m
a
g
60°
30°
60°
OUTSTROKE DWELL RETURN
STROKE
210°
DWELL
SCALE OF THE DISPLACEMENT DIAGRAM :
CAM ANGLE: 10mm = 30°
FOLLOWER DISPLACEMENT: 1cm = 1cm
DIMENSION OF DISPLACEMENT DIAGRAM:
STROKE, H = 40mm
1 rev = 360/30 =12 cm
g
h
i
j
k
PRIME CIRCLE: R50mm
l
m
BASE CIRCLE: R40mm
CAM PROFILE
5. TRACE THE CAM PROFILE
DRAW EACH ROLLER ON THE POINTS. THEN,
DRAW LINE TANGENTIAL TO THE BOTTOM OF
THE CIRCLES REPRESENTING THE ROLLER.
DRAW THE CAM PROFILE
PROBLEM:
c
c
f
SEGMENT 3: FALL OF 2CM IN 60°
DIVIDE SEGMENT 1 INTO 6 EQUAL DIVISIONS.
DRAW STRAIGHT LINE FROM INITIAL TO FINAL
POINT OF THE SEGMENT TO CONSTRUCT THE
CONSTANT VELOCITY RISE. THEN LABEL POINTS
OF INTERSECTION BY "g" TO "m".
SEGMENT 4: DWELL IN 210° (TO COMPLETE 1REV)
DRAW STRAIGHT HORIZONTAL LINE FROM
LAST POSITION "m" TO THE FINAL POINT OF THE
SEGMENT. LABEL THE LAST POINT "m".
3. PREPARE THE BASE CIRCLE OF THE CAM.
DRAW THE BASE CIRCLE WITH A RADIUS OF
4cm NEAR TO THE DIAGRAM. DIVIDE THE CIRCLE
ACCORDING TO THE DIVISIONS IN THE
DISPLACEMENT DIAGRAM. DRAW THE GUIDING
LINES FOR EACH ANGULAR DIVISION.
d
e
g
PITCH CIRCLE
A CAM IS TO GIVE THE FOLLOWING MOTION TO A ROLLER FOLLOWER:
NAME:
1. OUTSTROKE DURING 60° OF CAM ROTATION
3. RETURN STROKE DURING NEXT 60° OF CAM ROTATION
2. DWELL FOR THE NEXT 30° OF CAM ROTATION
4. DWELL FOR THE REMAINING 210° OF CAM ROTATION
THE STROKE OF THE FOLLOWER IS 40 mm AND THE MINIMUM RADIUS OF THE CAM IS 40 mm. THE ROLLER RADIUS IS 10 mm. THE ROLLER
FOLLOWER MOVES WITH UNIFORM VELOCITY DURING BOTH THE OUTSTROKE AND RETURN STROKES.
ANDREZA, LEMUEL V.
PROFESSOR:
ENGR. RODELIO PADRIQUE
PLATE 2:
INLINE ROLLER FOLLOWER WITH
CONSTANT VELOCITY
DATE SUBMITTED:
APRIL 12, 2021