There is not a general classification for cam mechanical systems. The contact pressure distribution on the cam and follower surface is calculated by imposing the boundary conditions of contact force, lubricant damping value and. They offer high dynamic and static load carrying capability, and antifriction performance, in a compact design. A model of the cam and follower system is made to predict the contact pressure distributions on the follower body at different cam lift positions. Cf 12v uur table 1 types and model numbers of cam followers type shape stud with a hexagon socket stud with a driver groove with a tapped hole for greasing. Hexagonal hole eccentric collar mcgill add suffix add suffix add suffix add prefix ina skf iko thk add suffix uu remove suffix r add suffix a ntn add suffix add suffix smith add suffix s add suffix c add suffix b add suffix e. A simple toy based on a cartoon character ed the handyman is controlled by a cam and follower. There are two main types of impacts, a striking impact and a force. It is a popular type of cam follower provided with a driver groove on the head of the stud. Here we are presenting some solved problems based on cam profiles. Cam follower with grease nipple a hex wrench can be used to. A according to type of shape 1 radial or disc cam 2 cylinrical cam 3 translation or wedge cam 4 conjugate cam 5 globoidal cam 6 spherical cam types of cams 2.
However, the functional embodiments and functions of each subsystem have relatively few possibilities. This analysis is an important step for fixing an optimum size of a cam and follower. Our cam followers can support the high radial and axial loads which might arise from improper alignments. Introduction of cams and types of cam and followers. Cam followers are often used on conveyors, process transfer lines, such as those used int industries such as. A cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to follow cam lobe profiles. Types and model numbers of the cam follower the cam follower is divided into several types as indicated in table 1. Cam follower mechanism plays a significant role as it utilized to drive a minute machine component seamlessly. The objective of this paper is to modelling design and analysis of a cam and follower. Cam is a very important topic in the kinematics of machines or theory of machines. Current simulations of camfollower system dynamics correlate. This cam follower is made of low alloy, throughhardened chromium steel for durability and heat tolerance, and has lubrication holes on the studs flange side, threadside end face, and shank for reapplying lubricant. The follower arm swings or oscillates in a circular arc with respect to the follower pivot.
Modelling, design and analysis of cam and follower a. In the cam follower with seals, a special thrust washer is employed for the sliding surface inside the bearing to improve heatseizure resistance. Cam and follower are widely used in regulating, opening and closing of valves inlet and exhaust in the internal combustion engines. Cam and follower cam follower the cam and follower is a device which can convert rotary motion circular motion into linear motion movement in a straight line. As the cam rotates in an anticlockwise direction, the. The driver is called the cam and the driven member is called the follower. Analysis and usage of cams and their followers engineering.
The follower system revolves with respect to the center line of the vertical shaft. In a cam and follower system, the cam is a mechanical element often in the form of a flat piece of metal tooled into an oblong shape that rotates or slides. To rotate the follower the cam lobe has to operate on one side of it. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. An optimum design of cam mechanisms with roller follower. Cam followers leading uk supplier of cam follower bearings.
Cam mechanism article about cam mechanism by the free. Outer ring seal side plate stud mavin the webstore. What are the applications of different types of cam. Type of cams, type of followers, displacement, velocity and acceleration time curves for cam. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate. A cam is a mechanical device used to transmit motion to a follower by direct contact. The cam follower is a compact bearing with a highrigidity shaft and a builtin needle bearing. The basic purpose of using the cam follower is converting the rotary motion of the cam to. As the cam turns, driven by the circular motion, the cam follower. The purpose of this study is to improve the systems performance on production line of camfollower used to regulate the flow of fuel into the cylinder engine through value stream mapping at a. This video explains the concept of cam and follower mechanism used in an engine, with the help of a live example that shall prove to be helpful for engineering students.
If the mass and velocity of the follower as m1 and v1, and the cam mass velocity as m2 and v2 respectively. As a result, the manhours for machining and assembly can significantly be reduced because it is unnecessary to align the cam follower with the cam groove and machine the mountinghole area with precision. Polydyne word is basically derived by combining and contracting the words. Therefore, lubrication and mounting from both directions is possible. Description of the cam follower p 5 featuresofthecamfollower 1. Pdf an optimum design of cam mechanisms with roller follower. Cam mechanism a mechanism that usually consists of two moving parts a cam and tappet and a fixed part the support. A familiar example is the camshaft of an automobile engine, where the cams drive the push rods the followers to open and close the valves in. Features and types cam follower features of the cam follower fig.
Cam mechanisms are widely used because with them, different types of motion can be possible. The model is created by the basic needs of an engine with the available background such as forces acting over the cam by means of valve while running at maximum speed. Predictions of cam follower wear in diesel engines. Miniature type cam followers which is provided with a thrust disk made of special. The video explains the entire construction and working of a cam and follower. Needle roller cam followers have a heavy outer ring cross section and a full complement of needle rollers. A general classification of cam and camfollower types.
The most commonly used cam is the cam plate also known as disc cam or radial cam which is cut out of a piece of flat metal or plate. The geometry of cam follower systems page 1 engines. A cam follower roller bearing also called track follower is a specialty roller bearing designed to follow tracks or cams and in a wide range of linear motion systems. Usually a flat faced or roller companion to the camshaft that transfers the action of the camshaft to the rest of the valve train by sliding or rolling on the cam lobe. Here, the follower moves in a plane perpendicular to the axis of rotation of the camshaft. Coding for other cam follower and yoke roller types optional features seals cylindrical o. Various types of cam follower are used for different types of applications. Pdf the problem in the design of a cam is the analyzing of the. And by the motion of follower, a breadth cam mechanism can be classified as two types. Combine with clube cam followers is strongly recommended for full. Several key terms are relevant in such a construction of plate cams. They have a solid threaded pin, or stud, that means they can be attached to machine components easily. It contains needle bearings and is used as a guide roller for cam mechanisms or straight motion.
The topic is a part of the theory of machine stream that deals with the study of. Cam follower bearings cam follower catalog ondrive. Cam and follower design basics design of cam profiles. Breadth cam profile design with oscillating roller follower.
Cam followers are a specialised type of roller or needle bearing designed to follow cam lobes, and they come in many different types. Cam followers 3 cam followers cam followers are available in two types. Analytical kinematic analysis of cam mechanisms in mechdev. Cam lobes are generally half an inch wide or so to generate sufficient stiffness. Most suitable as a guide roller for cam mechanisms and linear motion of automated machines and dedicated machines. They are used as track rollers, cam followers, and in. Ina kr40pp cam follower, stud type, sealed, metric, steel. Stainless steel ball bearing cam and followers with bearing diameters ranging from 14 to 78 inch. Research article cam follower mechanism simulation. Then the rates of change of velocity during impact as. However, the manufacturing of cams is expensive and the wear effect due to the. A cam follower, also known as a track follower,1 is a specialized type of roller or needle bearing designed to follow cams.
Computer aided kinematic and dynamic analysis of cam and. Proper design of cam and follower is required for perfect tuning between opening and closing of valves with cam shaft speed. The unit can be installed and maintained without concern for installation space, thereby boosting operating e. The relevance and role of cams in modern machine systems has made their continuous study necessary and.
Although we checked the errors, but if you mark some error, let us known in the comment box. You can see an application of the cam follower in another article here about the internal combustion engine. Terms used in cam and follower theory of machine youtube. Cam follower roller bearings stud type track follower. Cam followers come in a vast array of different configurations, however the most defining characteristic is how the cam follower mounts to its mating part. This is the maximum distance that the cam pushes the follower when the valve is open. Hardened steel roller bearing types of cam followers with bearing diameters ranging from 14 to 34 inch. Model cfra cam follower with hexagon socket spherical outer ring. Available in inch and metric sizes with static load ratings to 2250 lbs.
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