A project report on cam follower utility in internal. The cam follower is used in a wide range of applications such as cam mechanisms of automatic machines, dedicated machines as well as carrier systems, conveyors, bookbinding machines, tool changers of machining centers, pallet changers, automatic coating machines, and sliding forks of. 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. 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. To select the right cam follower bearing for a cam or track system, consider the load magnitude and type, speed, deflection, misalignment and lubrication. Cad cam method is widely used to explain any software system capable of describing parts with geometry. A cam is a mechanical device used to transmit motion to a follower by direct contact. Load magnitude and direction affect the bearing type and size that would best. Applications and best practices for carter cam follower. The important point is that contact between the cam and the follower must be sustained. Module 10 lecture 2 kinematics of machines youtube. In a cam follower pair, the cam normally rotates at uniform speed by a shaft, while the follower may is predetermined, will translate or oscillate according to the shape of the cam.
Automated types of machinery, cam and follower are used in different parts which are automated in motion. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. There are so many different applications of cam and follower mechanism. Nptel mechanical engineering computer aided design. A cam is a mechanical member used to impart desired motion displacement to a follower by direct contact either point or line contact.
Choose from assorted cam follower types, including full complement needle rollers, stud, heavy stud, crowned and yoke. Elements of mechatronicselectromechanical electromechanical elements refer to. A translating follower is free to rotate about its axis of. Cam follower can absorb more shock than normal and can reduce distortion. Co 4 a understand the mechanism of brittle and ductile fracture of materials. It is normally connected with a prime mover, which rotates it. Some cam designs capture the follower in a groove to maintain contact. Cams and followers video lecture from chapter cams and followers in theory of machine for mechanical engineering students. The cam follower is might be gravity type or spring loaded. It is the technology concerned with the use of digital computers to perform certain functions in design and production.
Applications and best practices for carter cam follower bearings. Download nirali theory of machines pdf online2021 by r r. Analysis and simulation of cam follower mechanism using. Design of cam and follower system using basic and synthetic. In cases where the follower is in the vertical plane, the weight of the follower may be sufficient to maintain contact. The cam follower mechanism modelling is based on the kinematic and dynamic results. Cam and follower design basics design of cam profiles. 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. Nptel mechanical engineering computer aided design and. Example of cam action concept and definition of cam. Aug 20, 2018 cam is a mechanical element which is used to deliver the reciprocating or oscillating motion to another machine element known as follower. Includes geared systems, camfollower systems and linkages rigid links. Elements of mechatronicselectromechanical electromechanical.
Nptel provides elearning through online web and video courses various streams. Apr 02, 20 cad cam systems pdf notes free download, computer aided design pdf notes introduction. Download free sample of theory of machines book pdf from nirali prakashan with instant activation at best price in india. Free crash course lecture 35 cam and followers theory of. Cam and follower is a type of assembly, both works together in any machine element. I could use something if i had too, only once at assembly, but the device needs to be maintenance free. Chain and sprocket lever linkage wheelaxle springs. Ppt cam and follower powerpoint presentation free to. As indicated by the definition, the applications of computeraided manufacturing fall into two broad. Mar 18, 20 introduction of cams and types of cam and followers.
The follower system revolves with respect to the center line of the vertical shaft. Generally, manual handling in industries has been reduced to the minimum. Two bodies with a cam follower joint which allows sliding are shown in fig. A cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to follow cam lobe profiles. 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 synchronization. If you like this article then please share with your friends. Cams cam a mechanical device used to transmit motion to a follower by direct contact. Dec 06, 2014 4 draw the cam profile for conditions same as in 3, with follower off set to right of cam center by 5mm and cam rotating counter clockwise. Mechanical engineering kinematics of machines nptel. Cam followers and track rollers grainger industrial supply.
Nptel provides elearning through online web and video courses various. Buy nirali theory of machines pdf online2021 by r r utturkar. Sure short revision, theory of machines cam and follower. Similarly, the contact between the involute curves that form the meshing teeth of two gears are cam joints, as is a wheel rolling on a surface.
From a functional view point, a cam and follower arrangement is very similar to the linkages discussed throughout this book. However, the load rating is lower compared to the fullcomplement design, as there are fewer and shorter. Pin the second link to the free end of the first link. View lab report 240212365 camfollower labreport from mechanical msd210 at university of pretoria. Cams with translating and oscillating followers, globoidal cams with oscillating followers and twodimensional disk cams with translating and oscillating roller followers. Camfollower systems are frequently used in all kinds of machines. The first internal test manual examination will be based on modules i and ii and the. Cams theory of machines engineering reference with. Simple harmonics, constant velocity and acceleration types, displacement, velocity and acceleration of follower, cams with specified contours. Asok kumar mallik department of mechanical engineering iit kanpur. Lower and higher pairs, degrees of freedom, various types of mechanisms, their inversions and.
Automated types of machinery, cam and follower are used in. If in a four bar kinematic chain all links are free, motion will be unconstrained. When the motion of the follower is along an axis away from the axis of cam center, it is known as a off set follower. It reduces internal friction and provides a larger grease reservoir than conventional fullcomplement needle bearings. Nov 25, 2014 the cam follower is supported by a rigid frame which controls the motion and keep safe the device from irregular motions and damage. Follower driven in a cam follower pair, the cam normally rotates while the follower may translate or oscillate. Depending upon the accuracy the cam follower are selected and according to speed variation. Oct 20, 2020 cams and followers have a wide range of applications in manufacturing industries. Internal combustion engine to close and open the outlet valve and intake valve.
It can be a sewing machine, a cycle or a motor car. When the motion of the follower is along the axis passing through the cam axis, it is known as a radial follower. Cam followers and track rollers from grainger can withstand a variety of mechanical applications. Kinematic chain when kinematic pair are coupled in such a way that the last link is joined. Determine forces required to generate given accelerations of a mechanism. A free powerpoint ppt presentation displayed as a flash slide show on id. If the cylindrical surface is replaced by a conical one, a conical cam results. A wide range of linear motions is available from cams and followers. Develop the design concepts of different types of mechanism with lower pairs and. A screwdriver slot is provided at the flanged end of the stud for the purpose of preventing the stud from turning when the nut is. Cam and follower design basics design of cam profiles and. Analyze displacement, velocity and acceleration of cam follower at different positions of cam with specified contours by. Cam and follower free download as powerpoint presentation. Cams theory of machines engineering reference with worked.
The cam follower rotates on low friction self lubricating bushings, but there will be no lube between the cam profile and roller follower od. Introduction of cams and types of cam and followers. Request for material recommendation for cam and follower. A cam may be rotating or reciprocating whereas the follower may be rotating, reciprocating or oscillating. The cam follower should be drawn up tightly endwise so the bearing endplate is securely backed up by the machine member. Application of cam and follower types of cams types of cam followers concept and definition. Construction is same as previous case, except that the lines drawn from 1,2,3. Module 10 lecture 1 kinematics of machines youtube. A finite trigonometric series is used to represent the displacement curve to cover the entire cycle of cam follower motion by lakshminarayana and kumar 1987. Track rollers can handle applications with a combination of both radial and axial loads.
Cam mechanisms are widely used because with them, different types of motion can be possible. Pdf cam and follower are widely used in regulating, opening and closing of valves inlet and exhaust in the internal combustion engines. Nov 11, 2012 the motion of the follower from a given cam profile the motion imparted to the follower by a given cam profile may be determined graphically using the reverse process that was described in the last paragraph. Cam and follower definition and types explained with images. Computeraided manufacturing cam can be defined as the use of computer systems to plan, manage, and control the operations of a manufacturing plant through either direct or indirect computer interface with the plants production resources. Chapter 7 71 spur, helical, rack and pinion, spur and worm gears 72 two gearing tooth profiles. Caged rollers on some needleroller type cam followers typically in metric series may be used in applications requiring higher speeds or longer prelubricated life. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate. Cad cam systems pdf notes free download, computer aided. A cam follower is a bearing that incorporates needle style rollers between a stud and a thick outer ring. The unique feature of a cam is that it can impart a very distinct motion to its follower.
Pdf theory of machines lecture notes meen 222dp handout. The roller follower operates in a groove cut on the periphery of a cylinder. Cam and followers are the example of higher pair due to the line contact between them. Cam and follower bearing are that they always distribute evenly, regardless of the configuration of the unit. For example, the contact between a cam and its follower is a higher pair called a cam joint. This technology is moving in the direction of greater. Cam and follower the linear cam moves backwards and forwards in a reciprocating motion. I have covered all the types of cams and followers with diagrams but still, if you have any questions about cams and followers then you can ask me in the comments. This is a plate cam with the follower riding in a groove in the face of the cam. Thus, cam follower mechanisms with a higher follower response rate can be designed using the polynomial profiles. Computer aided design and manufacturing notes pdf cad cam pdf notes cad cam pdf notes file to download are listed below please check it latest material links link complete notes. Sensors a variety of physical variables can be measured using sensors, e. Norton, design of machinery introduction to cam design.
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