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When the motion of the follower is along an axis away from the axis of the cam centre, it is called off-set follower. Offsets are required in cam and followers to reduce wear and side thrust.
- What is the purpose of a cam and follower mechanism?
- What is undercutting in cam follower mechanism?
- What are the necessary elements of a cam mechanism?
- What offset followers?
- What is cam purpose?
- What is the maximum value of pressure angle of cam?
- What is throw cam?
- Which type of cam is used for high speed engine?
- What is pressure angle in cam explain its significance?
- What is Prime circle in cam?
- At which parameter the cam size is defined *?
- How many types of cam are there according to motion?
- What is the difference between radial follower and offset follower?
- What is cam angle?
What is the purpose of a cam and follower mechanism?
A cam and follower mechanism is a profiled shape mounted on a shaft that causes a lever or follower to move. Cams are used to convert rotary to linear (reciprocating) motion. As the cam rotates, the follower rises and falls in a process known as reciprocating motion.
What is undercutting in cam follower mechanism?
Graphically when laying out the cam profile, first the successive positions of the follower according to the cam motion curve is drawn while keeping the cam fixed. ... This is known as “undercutting” and occurs whenever the radius of curvature of the cam profile is less than the radius of the roller ( ).
What are the necessary elements of a cam mechanism?
Cam is a driver member and follower is a driven member. A cam mechanism consists of three elements: a) the cam, b) the follower (or follower system), c) and the frame. The follower is in direct contact with the cam.
What offset followers?
Offset follower: The center line of the follower does not pass through the center line of the cam shaft. The amount of offset is the distance between these two center lines. The offset causes a reduction of the side thrust present in the roller follower.
What is cam purpose?
A camshaft acts as a timing device that controls the opening and closing of the intake and exhaust valves, as well as setting the valve overlap that occurs at the top dead centre on the exhaust stroke. The shaft is constructed with several journals that ride on bearings within the engine.
What is the maximum value of pressure angle of cam?
15° 20°
What is throw cam?
Stroke or throw: The greatest distance or angle through which the follower moves or rotates. It is the maximum distance of followers from the base circle. ... It is the smallest circle of a cam profile drawn from the center of rotation of the cam.
Which type of cam is used for high speed engine?
Explanation: Cycloidal motion curve has the best dynamic characteristics. The acceleration is finite at all times and the starting and ending acceleration is zero. It will yield a cam mechanism with the lowest vibration, stress, noise and shock characteristics.
What is pressure angle in cam explain its significance?
The pressure angle represents the steepness of cam profile, is the angle between the normal to the pitch curve at a point and the direction of the follower motion. ... But ultimately, the purpose of a cam is to get the desired motion using the cam and follower mechanism. Hence the direction of motion cannot be changed.
What is Prime circle in cam?
The prime circle of a cam is. ... the smallest circle drawn to the cam profile from the center of rotation of a radial cam.
At which parameter the cam size is defined *?
Explanation: Cam size depends upon base circle. Throw of a cam is the maximum distance of the follower from base circle.
How many types of cam are there according to motion?
There are two types of Head Cams. First is Single Head Cam and the second is Multiple Head Cam. Cam is Rotating about minor axis or respect to Follower.
What is the difference between radial follower and offset follower?
Rotating Cam, Translating Follower
If the motion is along the axis passing through the center of rotation of the cam, then it is called a radial inline follower, whereas if the motion is along an offset from the axis, it is called a radial offset follower.
What is cam angle?
A. During which the follower returns to its initial position. Of rotation of the cam for a definite displacement of the follower. Through which, the cam rotates during the period in which the follower remains in the highest position.
