Mar 18, 20 cam is a very important topic in the kinematics of machines or theory of machines. Type of cams, type of followers, displacement, velocity and acceleration time. From a functional viewpoint, a cam and follower arrangement is very similar to the linkages. Introduction cams are widely used in many types of machines because. The follower is pivoted at a suitable point on the frame and oscillates as the cam makes rotary motion. Keywords vap function, harmonic function, displacement law, cam follower mechanism, pressure angle. Here follower response by two methods are presented first one is using johns. The cam accepts an input motion rotary motion or linear motion and imparts a resultant motion linear motion or rotary motion to a follower. 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. The contact strain of the surface of the contact areas of the said type of. Kinematic and dynamic study of camfollower mechanism of.
Consequently, this type of follower is used when quick motions are required. On the runningin behavior of camfollower mechanism. This mechanism is very important in modern day engineering to incorporate a system with controlled movement. Operationally, it is categorized as a nonconformal contact where the imposed load acting on a relatively small contact area causes the pressure across the lubricant film to drastically increase to the extent that the elastic deformation in the contacting surfaces becomes significant. Cam mechanisms are widely used because with them, different types of motion can be possible. The driver is called cam and driven is called follower. Join the grabcad community today to gain access and download. Follower driven in a cam follower pair, the cam normally rotates while the follower may translate or oscillate. A flatfaced follower consists of a follower that is formed with a large, flat surface available to contact the cam.
One of the major applications of cam mechanism is valve actuation of internal combustion ic engines. The analysis of cam follower mechanisms, however, is lesser known and not introduced in undergraduate textbooks, even though it is a practical tool. However, the manufacturing of cams is expensive and the wear effect due to the. The basic purpose of using the cam follower is converting the rotary motion of the cam to the translating or oscillatory motion of the follower. Here we are presenting some solved problems based on cam profiles. Learn fundamental concepts and terminology learn how to. This paper presents a method for designing of a radial cam on the worksheet of mathcad including the calculation of followers displacements, values of its velocities and accelerations, the optimization of the contour of a cam by choosing the.
Patel me scholar, department of mechanical engineering, north maharashtra university, jalgaon abstract the objective of this paper is to modelling design and analysis of a cam and follower. Cam devices are versatile, and almost any arbitrarilyspecified motion can be obtained. Pdf in this paper, proper lumpedparameter models of cam systems are discussed as suitable tools for design. Cam and follower definition and types explained with images. 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. The sources of impact in cam follower mechanisms could be the result of. Cam mechanism is a case of a higher pair with line contact. Pdf a formclosed camfollower mechanism for a breath.
Optimization of cam follower mechanism to increase mechanical. The general kinematic pair of a cam mechanism intechopen. The accuracy for this system is depended upon the cam and follower being in contact at all times. Example of cam action concept and definition of cam. Analysis and usage of cams and their followers engineering essay. Cam follower roller bearings stud type track follower. In this work an attempt is made to change the flat face of follower to a curved face follower, so that the required point contact. As an example let us combine the parabolic motion curve blended with the. Cam mechanisms are one of the basic objects in the design of. Cam and follower design basics design of cam profiles and. Cam and follower mechanism in engine theory of machines. Feb 03, 2016 a cam is a rotating or sliding piece in a mechanical linkage that drives a mating component known as a follower. Cam and follower mechanism and their types mechanicalmaster. The transformation of one of the simple motions, such as rotation, into any other motions is often conveniently accomplished by means of a cam mechanism a cam mechanism usually consists of two moving elements, the cam and the follower, mounted on a fixed frame.
Numerical analysis of planar cam follower mechanisms. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. The follower is known as a radial follower if the line of. This work deals with the follower response determination for a given prescribed cam motion for single dof cam mechanism. The main purpose of the work presented in this paper was to study the kinematic and dynamic of motion characteristics of the cam follower mechanism of the cutting file machine. Pdf an optimum design of cam mechanisms with roller follower.
Traditionally, many basic forms of motion curves have been developed or applied to cam follower mechanisms, including simple polynomial curves and. Cam is a mechanical element which is used to deliver the reciprocating or oscillating motion to another machine element known as follower. Design of cam and follower system using basic and synthetic. A cam follower, also known as a track follower,1 is a specialized type of roller or needle bearing designed to follow cams. Design of camfollower mechanism using vap function in the. The cam and follower mechanism is widely used for operating the inlet and exhaust valves of internal combustion engines. Rbc roller cam followers needle roller cam followers lbf. The current cam and follower mechanism in four stroke internal combustion engine employs a flat follower. 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. Introduction of cams and types of cam and followers.
Cam may be rotating or reciprocating while a follower may be rotating, reciprocating and oscillating. Analysis and simulation of cam follower mechanism using. Simulation model of cam follower mechanism with 345 polynomial cam profile. G student department of mechanical engineering 1, ambajogai, maharashtra, india 1 email. Cam and follower combination belongs to the category of higher pairs. The driver is called the cam and the driven member is called the follower. When the motion of the follower is along an axis which is passing through the centre of the cam, then these types of followers comes under the radial followers. Erdman and sandor 1997 illustrate the three types of cam design functions in. In this type, as the cam rotates, the follower reciprocates or translates in the guides. Analytical kinematic analysis of cam mechanisms in mechdev. You can see an application of the cam follower in another article here about the internal combustion engine.
From now we will term cam and follower mechanism as cam. 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. The cam follower is a compact bearing with a highrigidity shaft and a builtin needle bearing. Various types of cam follower are used for different types of applications. Cam follower mechanism plays a significant role as it utilized to drive a minute machine component seamlessly. Solved problems based on cam profiles engineering tutorials. This type of follower can be used with a steep cam motion and does not jam. A cam follower mechanism is a sliding piece on a linkage that is used to convert rotary motion into linear motion or viceversa. Apr 01, 2018 a cam is a mechanical member which impart desired motion to the follower by direct contact. The cam converts rotary motion of one element into reciprocating linear motion or into oscillatory motion. The cam and follower mechanism are widely used in automobile industry. A cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to follow cam lobe profiles. This analysis is an important step for fixing an optimum size of a cam and. Pdf a computational approach for cam size optimization of.
Cam is a mechanical member for transmitting a desired motion to a follower by direct contact. The grabcad library offers millions of free cad designs, cad files, and 3d models. Cam and follower is a type of assembly, both works together in any machine element. Cam follower introduction a cam follower mechanism is a. Coding for other cam follower and yoke roller types optional features seals cylindrical o. Although we checked the errors, but if you mark some error, let us known in the comment box. The use of a cam and follower mechanism is prevalent in industrial machines. Cam and followers are the example of higher pair due to the line contact between them. The cam is the driver member and the follower is the driven member. Pdf cam mechanisms are integral parts of many products.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. Camshaft is the brain of the engine must include cam lobes, bearing. Cam and follower mechanism types and functions mechtics. Model cfhra eccentric cam follower with hexagon socket spherical outer ring. A formclosed camfollower mechanism for a breath simulator machine 3 3. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate. The cam follower mechanism designed with the vap function has smaller follower accelerations, as well as lower pressure angles than the one with harmonic function. A cam is a mechanical device used to transmit motion to a follower by direct contact. Design of cam and follower system using basic and synthetic curves. Jan 17, 2014 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. Mar 07, 20 i make this video by using the 3d via composer. The output accuracy of the system corresponds to the motion of the follower. An optimum design of cam mechanisms with roller follower for combined effect of impact and high contact loads. The follower shown in figure 4 c is a flatfaced follower.
A computational approach for cam size optimization of disc camfollower mechanisms with translating roller followers article pdf available in journal of mechanisms and robotics 54. A camfollower forms higher pair as they have point contact at the junction. Optimization of cam follower mechanism to increase mechanical efficiency mr. The paper deals with a configuration of a cam mechanism with a fla t follower that is. The abovementioned knife edge follower, roller follower and flatfaced followers are the radial follower. Cam follower roller bearings, stud type inch and metric.
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