Table of Contents
The cam and follower mechanism is widely used for operating the inlet and exhaust valves of internal combustion engines. They are used in wall clocks and the feed mechanism of automatic lathe machines. They are also used in paper cutting machines and weaving textile machinery.
What are cam followers used for?
The Cam Follower is a compact and highly rigid bearing with a shaft. It contains needle rollers and is used as a guide roller for cam mechanisms or straight motion. Since its outer ring rotates while keeping direct contact with the mating surface, this product is thick- walled and designed to bear an impact load.
What is an example of a cam follower?
A cam follower is a component that is intrinsically tied to a cam. Cams exist in many applications–dishwashers, sprinklers, etc. –but the most well-known example is that of a camshaft in a car. The goal of a cam is to convert rotary motion to linear motion.
Which type of cam follower is used in automobiles?
Q. The cam follower generally used in automobile engines is B. flat faced follower C. spherical faced follower D. roller follower Answer» c. spherical faced follower.
Where are cam mechanisms used?
Cam mechanisms are used in various areas of machine building, such as internal-combustion engines, metal-cutting machines, and machines of the food industry, in which the cam mechanism performs a programmed operation, as well as in automated machines, in which cam mechanisms perform control functions, connecting and.
Which cam follower is used in aircraft?
Roller follower: Roller followers are used in gas and oil engines. They are also used in aircraft engines due to their limited wear at high cam peripheral velocity.
Which car engine uses followers?
knife edge follower.
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.
Where are the roller follower extensively used?
The roller followers are extensively used where more space is available such as in stationary gas and oil engines and aircraft engines.
Can and follower is an example of?
Cam & follower is an example of – Theory of Machines – 1.
Which follower is extensively used in aircraft?
In a roller follower, a roller is held by a pin to the follower assembly. This type of follower is very extensively used in practice, due to the low rate of wear and perfect rolling contact with the cam.
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 types of cam and follower is extensively used in automobile engine?
Q. The cam follower generally used in automobile engines is B. flat faced follower C. spherical faced follower D. roller follower Answer» c. spherical faced follower.
Which of the following are the types of cam?
Types of Cams Wedge or flat cam. Disk or Plate cam. Spiral cam. Cylindrical cam. Heart-shaped cam. Translating cam. Snail drop cam. Conjugate cam.
What is dwell period of cam?
Rise is the motion of the follower away from the cam center, dwell is the motion during which the follower is at rest; and return is the motion of the follower toward the cam center. There are many follower motions that can be used for the rises and the returns.
What offset is provided for a cam follower mechanism?
A cam with a translating flat-face follower is desired to have the follower motion y (θ) = 4[2πθ – θ2], 0 ≤ θ ≤ 2π Contact stress considerations dictate that the radius of curvature of the cam profile should not be less than 40 mm anywhere.
What is meant by jump phenomenon in cam and follower system?
Jumping happens when cam rotates at critical speed above certain value. at jumping, the speed is so high that the follower does not follow the cam and we get a sound of different type. Due to the compressive load applied by the spring, at higher speeds, follower moves without following the cam and thus jumping happens.
Which cam is extensively used in air craft engines?
knife edge follower.
Which cam are widely used in actual practice?
cam axis. The cams are all radial rams. In actual practice, radial cams are widely used due to their simplicity and compactness.
Which one of the follower is widely used?
Roller follower: It is a widely used cam follower and has a cylindrical roller free to rotate about a pin joint.
Is cam and follower an open pair?
4. Which of the following is an open pair?Discussion :: Theory of machines – Section 2 (Q. No. 4) [A]. Ball and socket joint [C]. Lead screw and nut [D]. Cam and follower.
Is typewriter a machine or mechanism?
A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element.
Which type of pair is formed by the cam and follower without a spring?
Explanation: When the two elements of a pair are not connected mechanically but are kept in contact by the action of external forces, the pair is said to be a force-closed pair. The cam and follower is an example of force closed pair, as it is kept in contact by the forces exerted by spring and gravity.
Which following is extensively used in aircraft engines?
The cam follower extensively used in aircraft engines is A. Knife edge follower. Flat faced follower. Spherical faced follower. Roller follower.
What is cylindrical cam?
A cylindrical cam is a 3D cam which drives its follower in a groove cut on the periphery of a cylinder. The follower, which is either cylindrical or conical, may translate or oscillate. The cam rotates about its longitudinal axis, and transmits a translation or oscillation displacement to the follower at the same time.
Why a roller follower is preferred to a knife edge follower?
Answer: In case of knife edge follower there is sliding motion between the contacting surface of cam and follower. Whereas in roller follower there is rolling motion between contacting surfacing and more contact area, therefore rate of wear is greatly reduced.
Which motion of follower is best for high speed?
Hence for the high-speed engine, the cam follower should move with Cycloidal motion.
