If m is the effective mass of the follower, then the driving force required to accelerate the follower. Example of cam action concept and definition of cam. Ppt cam and follower powerpoint presentation free to. Lab manual theory of machines me3003 mechanical engineering.
The exact profile of the cam can be obtained by taking observations. Experimental and theoretical research of cams wearing of cams. Instead of an inner ring, they have a threaded solid stud pin. Pdf lab manual of theory of machine irshad ahmad khan. Norton, design of machinery introduction to cam design.
Such followers constitute cam follower mechanisms, which transform the circular motion of the cam into a linear or angular motion of the follower. Introduction of cams and types of cam and followers. The xo plot can be used to find out the velocity and acceleration of the follower system. Take a pencil and a book to do an experiment as shown above. Experimental analyses are done with the objectives of.
Pdf mechanical error analysis of disk cam mechanisms. Sagar institute of research and technology, bhopal experiment no. They are based on either needle or cylindrical roller bearings. Cam mechanisms are widely used because with them, different types of motion can be possible. Cams are used to convert rotary to linear reciprocating motion.
The accuracy of the output or the follower will depend on the cam and follower being in contact at all times. 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. Me 4201 machine design lab section 3 group 4 experiment 4 cam follower experiment jordan gautreau khalil hamed dallas amond michael mannino abstract a cam follower system is a very simple mechanism used to control and convert one type of motion to another type of motion. Make the book an inclined plane and use the pencil as a slider use your hand as a guide. 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. Pdf analytic analysis of a cam mechanism researchgate. Title to study various types of cam and follower arrangements. Providing the cam and follower remain in contact, this is a one degreeoffreedom dof system.
Cams cam a mechanical device used to transmit motion to a follower by direct contact. Barrel ball input propulsion onoff mechanism cam and follower implementation cam and follower project group 1 jeff adkins brok dawley huynh ngoc lu guangyu alex nowysz the basics computer aided conceptual design and modeling of a device that uses cam and follower mechanism. The dynamic synthesis and analysis of the one degree of freedom model, mechanism. Mechanical error analysis of disk cam mechanisms with a. Comparison of a range of follower on an eccentric circular cam. To plot follower displacement vs cam rotation for various cam. The cam follower is supported by a rigid frame which controls the motion and keep safe the device from irregular motions and damage. Request for material recommendation for cam and follower. A cam and follower mechanism is a profiled shape mounted. Group 1 cam and follower project by jeff adkins on prezi. The driver is called the cam and the driven member is called the follower. This article will discuss the calculation method of the velocity of cam follower.
Cam is a mechanical member for transmitting a desired motion to a follower by direct contact. I have a very small radial disk cam with an oscillating roller follower that has high contact stress between the cam and roller. One or the other motion will depend on the configuration of the mechanism and, specifically, on the position of the follower with regard to either the cam. Then, a new threemass, twodegreeoffreedom dynamic model was created. 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. The cam transfers rotational motion into linear motion by rotating the cam by a shaft connected to an electric motor. The linear cam moves backwards and forwards in a reciprocating motion.
Cad design is downloaded to cam in discrete increments by computer. Experimental set with eccentric cam and flat face follower, spanner, tachometer and motor drive. The analysis process also focus on the jump force of follower, that effect of vibration factor in cam mechanism system. Depending upon the accuracy the cam follower are selected and according to speed variation. In future, the analytical results will be complemented by experiment. Background and theory the cam follower experiment is a representation of a mechanical system in 4 which a cam is used to increase the mechanical efficiency of the system. Dynamic study of the cams by obtaining the jerk angle of a cam presented in the miniature model. Typical industrial cam follower systems include a force closed cam joint and a follower train containing both substantial mass and stiffness. Camfollower report final me 4201 machine design lab. Follower looses contact with cam surface when cam rotates beyond particular speed due to inertia forces.
To get familiar with the most common types of planar rotary cams by using a software. F mf af let s be the follower spring stiffness and xo the initial compression of the spring. The velocity of any cam follower can be calculated using the deferential method provided you have the equation relating the angular. M and constant acceleration cams with a roller follower. Cam and followers are mainly used to transfer rotory motion cam into reciprocating of oscillating motion of follower. This is a plate cam with the follower riding in a groove in the face of the cam. A1928 basically the same as the popular type cam follower, this model is provided with tapped holes for piping on the stud head and the thread.
Experimental study of engine camfollowers enrico ciulli 1, bruno piccigallo 2, dagoberto vela 1department of mechanical, nuclear and manufacturing engineering, university of pisa, italy email. Cams theory of machines engineering reference with. During analysis data will be process, high speed will be select from the types of speed of cam in follower system. A cam is a mechanical member for transmitting a desired motion to a follower by direct contact. Cam and follower free download as powerpoint presentation. When rolling on a surface, cam and follower pair, tooth gears. Study of a cam and its follower movement according to the displacement diagram and lay out theoretical and actual cam profile. Cam follower with a tapped hole for greasing model cft speci. Pdf cam mechanisms are integral parts of many products. An experimental study of the effects of cam speeds on cam. Traditionally, in a cam follower system, the cam is often operated at a constant speed and the motion characteristics of the follower are determined once the cam displacement curve is designed.
It becomes a twodof system once the cam and follower. The cam follower does not have to move up and down it can be an oscillating lever as shown above. Cam analysis machine tm1021 theory of machines tecquipment. The driver is called cam and driven is called follower.
Clearance the radial internal clearances of cam followers. Cam mechanism is a case of a higher pair with line contact. The cam analysis machine cam has been designed to enable students. A cam is a mechanical device used to transmit motion to a follower by direct contact. However, the manufacturing of cams is expensive and the wear effect due to the. A familiar example is the camshaft of an automobile engine, where the cams drive the push. 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. A cam is a m echanical m e m ber used to i m part d esired motion to a f ollower b y direct contact.
What is cam and follower types of followers explained. This activity may be accomplished on the basis of the theory, experiment. For an assembled conjugate cam mechanism with two separate oscillating roller followers serving as a conjugation measuring fixture, when the cams rotate, the variation of the subtending angle. The cam may be rotating or r e c i pro c ating where a s the f oll o wer m ay be rot a tin g, reciprocating or oscillating.
It also obtains critical design output parameters of roller cams. To study various type of cam and follower arrangements. Experimental method of cam mechanisms with roller follower sizes measuring with digital photograph. Iko designs and manufactures a broad selection of cam followers to meet the diverse needs of applications including machine tools, industrial robots, electronic parts production and office automation equipment. From the kinematic point of view, the approach by varying. In this interactive package the user has options to select i follower motions, ii cam functions, iii motion segments, and iv cam angle increments.
There are three major parts in the setup as shown below. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate. Hello everyone, i would like to ask if anyone could please help me with the following situation. For this experiment rotate the system manually for taking reading, arrange the set up. As the cam rotates, the follower rises and falls in a process known as reciprocating motion. Download as ppt, pdf, txt or read online from scribd. Camshaft is the brain of the engine must include cam lobes, bearing. Knief edge follower, roller follower, spherical follower, flat faced follower.
The cam follower is might be gravity type or spring loaded. Tsai department of mechanical engineering, national cheng kung university, tainan 70101, taiwan, republic of china m. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. Angle of cam rotation curve for different cam follower pairs. Research article cam follower mechanism simulation. A cam follower is a bearing that incorporates needle style rollers between a stud and a. It shows how they convert rotary to linear motion, and helps students understand their limits of use before the onset of bounce. When you move the book smoothly upward, what happens to the pencil. Background and theory the cam follower experiment is a. Application of cam and follower types of cams types of cam followers concept and definition. After the model was validated, a controlled impact and overtravel mechanism was designed, manufactured, and assembled to a simplified industrial cam follower system, the cam dynamic test machine cdtm. Follower driven in a cam follower pair, the cam normally rotates while the follower may translate or oscillate. Clearance the radial internal clearances of cam followers are shown in table 4.
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