There are so many different applications of cam and follower mechanism. However, the manufacturing of cams is expensive and the wear effect due to the. Cam followers skf cam followers studtype track rollers are designed to run on all types of tracks and to be used in cam drives, conveyor systems, etc. Application of cam and follower types of cams types of cam followers concept and definition. A cam is a mechanical device used to transmit motion to a follower by direct contact. Cam and follower design basics design of cam profiles and. Cam followers are often used on conveyors, process transfer lines, such as those used int industries such as. This type of follower can be used with a steep cam motion and does not jam. A cam is a rotating machine element which gives reciprocating or oscillating motion to another element known as follower. Cam follower roller bearings stud type track follower. The cam and the follower have a line contact and constitute a higher pair. Analysis and simulation of cam follower mechanism using.
When the flanks of the cam connecting the nose and base circles are of convex circular arc, such cams are referred as circular arc cams. The follower is pivoted at a suitable point on the frame and oscillates as the cam makes rotary motion. The cam drives the two tools positively away from the danger zone the plunger is moved to the left, and the workhead is moved upwards. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. Simulation model of cam follower mechanism with 345 polynomial cam profile. The data required for various functions are passed from one application software to another in a seamless manner. Cam followers, roller followers misumi online shop. Introduction of cams and types of cam and followers. Models with stud diameters ranging from 3 to 30 mm are prepared, and are suitable for a. The base circle is the smallest circle with its centre at the cam centre that can be drawn tangential to the cam. How to download notes directly in pdf format from nptel quora. The velocity of any cam follower can be calculated using the deferential method provided you have the equation relating the angular. Norton, design of machinery introduction to cam design. The follower system revolves with respect to the center line of the vertical shaft.
Majority of video courses on nptel do not offer lecture notes for download. Skf cam followers studtype track rollers are designed to run on all types of tracks and to be used in cam drives, conveyor systems, etc. Accelerating the mass of the outer ring normally requires the largest part of moment mt. Lower and higher pairs, degrees of freedom, various types of mechanisms, their inversions and.
Since the cam follower is supported in a cantilever position, the mounting hole diameter should be prepared without play between the stud and the hole especially when heavy shock loads are applied. Introduction the cams are usually rotated at uniform speed by a shaft, but the follower motion is predetermined and will be according to the shape of the cam. Automated types of machinery, cam and follower are used in different parts which are automated in motion. Although we checked the errors, but if you mark some error, let us known in the comment box. How to download notes directly in pdf format from nptel. Solved problems based on cam profiles engineering tutorials. Consider a cam with a follower that rises with a parabolic motion from a dwell to another dwell such that the total lift is and the total rotation angle is. Cam and follower mechanism and their types mechanicalmaster.
For example, the product data is created during design. Straight edged cam or tangent cam circular arc cam. During the time that the follower is stationary, the cam is in a dwell period. What are the applications of different types of cam. Additionally, misumi offers a variety of cad data for free download. The driver is called the cam and the driven member is called the follower. Cam is a very important topic in the kinematics of machines or theory of machines. Module 10 lecture 1 kinematics of machines youtube.
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. Thrust disk type cam followers these bearings have special resin thrust disk washers superior in wear and heat resistance between the. With the rotation of the cam, the follower the shaft with the roller at bottom in the above picture gets oscillated or translated according to the profile of the cam. Cam and follower lecture free download as powerpoint presentation.
Instead of an inner ring, they have a threaded solid stud pin. This is likely to prevent further damage to the mechanisms. Module 3 hr gears terminology, fundamental law of gearing, involute profile. We will discuss the differential method for finding relation between the angular velocity of a cam and the linear velocity of a follower. It is normally connected with a prime mover, which rotates it. Cam follower nominal life the basic static load rating c 0 refers to the static load with constant direction and magnitude, under which the calculated contact stress in the center of the contact area between the roller and the raceway under the maximum load is 4000 mpa. During the other half revolution of the cam, the follower rises and then falls.
Cams classification of cams and followers, nomenclature, description and analysis of follower motion, pressure angle. Nptel syllabus kinematics of machines video course s note on the model curriculum prepared by aicte five of the seven topics listed under the heading kinematics of machine belongs to dynamics. Ribbed barrel cam with oscillating roller follower. More than 14 million products are available in our online shop. Cam is a rotating element which provides an oscillation or reciprocatory motion to another part connected with the cam. Explain what a cam is, how it is used, and the typical types of cams identify force closed and form closed followers and explain the benefits and limitations of each describe the primary types of cam motion programs introduction to cam design source. The follower arm swings or oscillates in a circular arc with respect to the follower pivot.
One response to kinematics of the camfollower mechanism. Design of cam and follower system using basic and synthetic. The following terminologies are used to draw cam profile. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate. Learn fundamental concepts and terminology learn how to. Camcentric adjustable cam followers are used where accurate positioning is required. Cam mechanisms are widely used because with them, different types of motion can be possible.
A familiar example is the camshaft of an automobile engine, where the cams drive the push. The scheme of cam follower me hafig 1 shows the scheme of a cam follower mechanism. The follower is known as a radial follower if the line of. Mar 18, 20 cam is a very important topic in the kinematics of machines or theory of machines.
Standard type cam followers these are the basic type bearings in cam follower series. Theory of machines institute of advanced studies in. What are the applications of different types of cam followers. Clevis mounting provides support on both sides of the cam follower and permits use of a high strength pin. Mar 24, 2019 cam and follower combination belongs to the category of higher pairs. 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.
Balancing on the other hand, the model curriculum of. Me 316 kdom department academic mentorship program. Cam followers, roller followers select, configure, order. Nptel syllabus kinematics of machines video course s. Mechanical engineering kinematics of machines nptel. In this case we want to keep the radius of the cam as shorter as possible to minimize this effect. Jan 24, 2008 lecture series on kinematics of machines by prof. Here we are presenting some solved problems based on cam profiles. This moment tends to jam the follower in its guides.
Clearance the radial internal clearances of cam followers are shown in table 4. A cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to follow cam lobe profiles. Computer integrated manufacturing cim encompasses the entire range of product development and manufacturing activities with all the functions being carried out with the help of dedicated software packages. Madhusudan rao department of mechanical engineering,iit delhi. The follower shown in figure 4 c is a flatfaced follower. Cam introduction, classification of cam and follower based on different aspects, follower motion, derivation of velocity, acceleration and jerk for different cases, tangent cam with roller. A frame is one which supports the cam and guides the follower. Radial or disc cams a cam in which the follower moves radially from the centre of rotation of the cam is known as a radial or a disc cam fig. Tushar kiran et al analysis and simulation of cam follower mechanism using polynomial cam profile 214 int. The coordinates of the visualized cam contour coordinates can be used in the cnc milling machine for the production of the real cam. Follower driven in a cam follower pair, the cam normally rotates while the follower may translate or oscillate.
In this type, as the cam rotates, the follower reciprocates or translates in the guides. Asok kumar mallik department of mechanical engineering iit kanpur. Internal combustion engine to close and open the outlet valve and intake valve. Module 12 4 hr determine of basic dimensions and synthesis of cam profiles, graphical and analytical methods, cams with specified contours. Cam and follower definition and types explained with images. 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. When the flanks of the cam connecting the nose and base circles are of convex circular. Feb 03, 2016 however, a roller follower can possibly jam during steep cam displacements. Cam follower analysis cams introduction a cam is a mechanical device used to transmit motion to a follower by direct contact. Yoke type cam followers are available with and without seals, and with crowned outer rings.
Cam and follower design basics design of cam profiles. This article will discuss the calculation method of the velocity of cam follower. A familiar example is the camshaft of an automobile engine. They are particularly useful for reducing clearance or. The scheme of camfollower me hafig 1 shows the scheme of a camfollower mechanism. Computer aided design nptel online videos, courses iit. Then, a new threemass, twodegreeoffreedom dynamic model was created. Computer aided design lecture series on computer aided design by dr. Cams cam a mechanical device used to transmit motion to a follower by direct contact. Example of cam action concept and definition of cam. A follower controlled by a pearshaped cam remains motionless for about half a revolution of the cam. Cam and follower mechanism is a widely used method of motion transformation. Sep 09, 2018 majority of video courses on nptel do not offer lecture notes for download.
The relevance and role of cams in modern machine systems has made their continuous study necessary and. Cam followers, roller followers misumi online shop select. A flatfaced follower consists of a follower that is formed with a large, flat surface available to contact the cam. Another part associated with the cam is called follower. Nptel video lectures, iit video lectures online, nptel youtube lectures. Some courses might have presentations or quiz papers uploaded, but rest of them just have transcripts which is pretty useless to refer as notes.
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