The spring constant is 20 nmm and the spring has an initial compression of. Camfollower report final me 4201 machine design lab. A p l i e d m echan e ornal of lie j mechanical ngineering. The visualization of the cam and follower and the simulation of working process of cam follower mechanism are presented. Rodriguez me3070 introduction to cams 10 camfollower a camfollower mechanism is. Overview the typical functions of a cam follower are to provide antifriction support of linear movement or to follow the surface of a cam. Kinematic pairs according to nature of mechanical constraint a closed pair. Me6401 kinematics of machinery kom syllabus unit i basics of mechanisms. Generally, the contour of the cam follower is characterised by a circular arc, which is sufficient for the conventional valve train.
Definitions of cam and follower uses types of followers and cams terminology. A few examples are mating spur gears, rack and pinion, cam and follower. Introduction, classification of cams, classification of followers, basic terminology used. The chemical processes of photosynthesis occurring independent of light is called dark reaction. Cams and followers video lecture from chapter cams and followers in theory of machine for mechanical engineering students. Feb 03, 2016 a cam is a rotating or sliding piece in a mechanical linkage that drives a mating component known as a follower. Cad cam method is widely used to explain any software system capable of describing parts with geometry. Mechanism, robotics, kinematics mechanical design 101. Download pdf of cad and cam practical mechanical engineering offline reading, offline notes, free download in app, engineering class handwritten notes, exam notes, previous year questions, pdf free download.
The coordinates of the visualized cam contour coordinates can be used in the cnc milling machine for the production of the real cam. Among these is a nice presentation by anurag purwar on quaternions and clifford algebras course notes. Photosynthetic pathways c, c and cam dark reaction. Computer aided kinematic and dynamic analysis of cam and follower. Syllabus, question banks, books, lecture notes, important part a 2 marks questions and important part b 16 mark questions, previous years question papers collections. Some contain additional notes by the professor inserted after the class was taught. Depending on the cam follower mechanism involved, the mechanical constraints involved in using design d may not be sustainable under dynamic operation. What is cam and follower types of followers explained with.
Cam and follower lecture free download as powerpoint presentation. Computer aided kinematic and dynamic analysis of cam and. Instead of precisely following the intended cam lobe or curve, the valve loses lift with some slight shift in valve timing points. If the cylindrical surface is replaced by a conical one, a conical cam results. Antenna theory notes hand written complete classroom notes download. The data required for various functions are passed from one application software to another in a seamless manner. Download as ppt, pdf, txt or read online from scribd. Only define start and stop position of the follower. Download notes of kinematics of machines nme 502 notes. The accuracy of the output or the follower will depend on the cam and follower being in contact at all times. Here you can download the free lecture notes of computer aided design and manufacturing notes pdf cad cam notes pdf materials with multiple file links to download. When the elements of a pair are held together mechanically, it is.
Design of cam and follower system using basic and synthetic. Path and or one or more of its derivates are carefully specified. It is very hard to find the configuration of the complete mechanism as a function of orientation of the cam analytically. However, the manufacturing of cams is expensive and the wear effect due to the. Analytical model, camfollower, servo motor introduction cams are commonly used in opening and closing of valves in internal combustion engines. The displacement function of a cam follower mechanism is given by y. Due to its capability to ensure complex output motion, the disc cam mechanism with translating roller follower is one of the most popular and used systems among the different cam follower types.
Photosynthetic pathways c 3, c 4 and cam dark reaction or blackmans reaction or path of carbon in photosynthesis this is the second step in the mechanism of photosynthesis. A cam pair can be replaced by one binary link with two turning pairs. The displacement function of a camfollower mechanism is given by y. Theoretical focus is given to fundamental computer aided design cad and computer aided manufacturing cam concepts. The offset e is negative if the follower is located below the x axis. A cam pair can be replaced by one binary link with two turning pairs at each end. Tech,manutech, 2017, 3rd semester lecture notes, notes, pdf free download, engineering notes. The cam accepts an input motion rotary motion or linear motion and imparts a resultant motion linear motion or rotary motion to a follower.
Cadcam method is widely used to explain any software system capable of describing parts with geometry. The roller follower operates in a groove cut on the periphery of a cylinder. The spring constant is 20 nmm and the spring has an initial compression of 10 mm, when the roller follower is in its lowest position. Previous year exam questions of theory of machine of bput. Norton, design of machinery introduction to cam design. A cam a part of the cam follower mechanical system, which complex peripheral profile depends on follower movement rule is an important mechanism and used popular in automatic mechanical. A cam follower system is a very simple mechanism that is used for control and conversion of one type of motion. Instead of precisely following the intended cam lobe or curve, the valve loses lift. The visualization of the cam and follower and the simulation of working process of camfollower mechanism are presented. This is a plate cam with the follower riding in a groove in the face of the cam. Proper design of cam and follower is required for perfect tuning between opening and closing of valves with cam shaft speed. Cad cam systems pdf notes free download, computer aided. We can classify cam mechanisms by the modes of inputoutput motion, the configuration and arrangement of the.
Course is intended for undergraduate mechanical engineering students involving on understanding kinematics of mechanisms, simple mechanism study, velocity and acceleration analysis of mechanisms, problem solving on belt drives, rope drives, using. Knief edge follower, roller follower, spherical follower, flat faced follower. Engineering dictionary pdf download this is the good pdf format dictionary, it will help you guys. Cad and cam practical pdf download lecturenotes for free. Pdf synthesis of cam mechanisms used for the exact design of cam profile for desired movement. Sep 16, 2017 cam and followers are mainly used to transfer rotory motion cam into reciprocating of oscillating motion of follower. Cam and follower systems are used in many common applications such as pumps and in the camshaft of an engine. Among these is a nice presentation by anurag purwar on quaternions and clifford algebras.
The course outlines modern solid modeling design, analysis, simulation, and manufacturing of mechanical systems. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. In a kinematic pair, if one element has got only one definite motion relative to the other, then the motion is called constrained motion. Learn fundamental concepts and terminology learn how to. Types of follower motion uniform velocity simple harmonic motion. The higher pairs may be classi ed according to the nature of the.
Pdf theory of machines lecture notes meen 222dp handout. Introduction to mechanisms and kinematics basic definitions machines are devices used to accomplish work. If the circular arc is substituted by a spline, it is possible to assign different curvatures to the follower. Knief edge follower, roller follower, spherical follower, flat. 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. Cad originated from early computer graphic systems, and evolved with the development of interactive computer graphics and geometric modeling technology. Previous year questions of theory of machine tm of bput bput, b. From a functional viewpoint, a cam and follower arrangement is very similar to the linkages. Classification of mechanisms basic kinematic concepts and definitions degree of freedom, mobility kutzbach criterion, grueblers. A link that makes complete revolution is called the crank. The relative motion is pure translation as in a reciprocating cam activating a knifeedge. Cam and followers are mainly used to transfer rotory motion cam into reciprocating of oscillating motion of follower.
Computer aided design and manufacturing pdf notes cad cam pdf notes book starts with the topics covering computers in industrial manufacturing, raster scan graphics coordinate. Roller follower often, you can just have the cam slide on the follower this requires very good hardness of the cam and follower and excellent lubrication but, sometimes a roller followers is used standard designs are available in catalogs. Cams can be classified according to their motion program. It is known that geometric parameters such as the base circle of the. Rodriguez me3070 introduction to cams 10 cam follower a cam follower mechanism is a linkage in which a contoured shape cam acts as. Download me6401 kinematics of machinery kom books lecture notes syllabus part a 2 marks with answers me6401 kinematics of machinery kom important part b 16 marks questions, pdf books, question bank with answers key, me6401. If the cam follower mechanism is relatively light and stiff. Cam mechanisms are widely used because with them, different types of motion can be possible. Analytical model, cam follower, servo motor introduction cams are commonly used in opening and closing of valves in internal combustion engines. Pdf me8492 kinematics of machinery kom books, lecture. What is cam and follower types of followers explained. The camrol cam follower from mcgill was designed to withstand the intermittent shock, loading. If the cam angular ve lo city is c on st an t at 100 r p m, determine the displacement, velocity, and acceleration of the follower at a cam angle of 60.
Find materials for this course in the pages linked along the left. This course is intended for second year diploma automotive technology students with emphasis on study of basics on mechanisms, kinematic analysis of mechanisms, gear drives, can drives, belt drives and study on governor mechanisms. Lecture notes design and manufacturing i mechanical. Cad cam systems pdf notes free download, computer aided design pdf notes introduction. Download link is provided and students can download the anna university me8492 kinematics of machinery kom syllabus question bank lecture notes part a 2 marks with answers part b marks and part c 15 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials.
Cam and follower are widely used in regulating, opening and closing of valves inlet and exhaust in the internal combustion engines. Pear heart circular drop cam follower cam and follower a follower is a component which is designed to move up and down as it follows the edge of the cam. Cam bearing clearancethese bearings require oil clearance to keep the bearing alive but the cam moves within the limit of clearance and this movement takes away from theoretical valve action. The relevance and role of cams in modern machine systems has made their continuous study necessary and. The follower arm swings or oscillates in a circular arc with respect to the follower pivot. The link opposite to the fixed link is called coupler and the fourth link is called lever or rocker if it oscilates or another crank if rotates. I am pleased to provide these notes that i have used in my theory of machines mechanisms and robotics classes over the past years. The follower system revolves with respect to the center line of the vertical shaft. Designers always expect the accuracy position of follower motion during all operating periods. Pdf synthesis of cam mechanism based on given program. Path andor one or more of its derivates are carefully specified.
But, in the given problem follower is a floating link of a constrained mechanism. Cam mechanism usually consists by cam, follower and roller. For example, the product data is created during design. Due to its capability to ensure complex output motion, the disc cam mechanism with translating roller follower is one of the most popular and used systems among the different camfollower types. It is the mechanical portion of amachine that has the function of transferring motion and forces from a power source to an output.