Experimental study of engine cam followers enrico ciulli 1, bruno piccigallo 2, dagoberto vela 1department of mechanical, nuclear and manufacturing engineering, university of pisa, italy email. The optimum design of camfollower mechanisms is considered in this paper. View and download suzuki madura gv700gl service manual online. Me 4201 machine design lab section 3 group 4 experiment 4camfollower experiment jordan gautreau khalil hamed dallas amond michael mannino abstract a camfollower system is a very simple mechanism used to control and convert one type of motion to another type of motion. Instruction manual to download this manual or others, go to. The cam follower motion is complex and the motion of the cam is transferred to the follower system by direct contact under conditions of high temperatures, no lubrication and high contact stresses.
I have used a cam mate to mate my cam and follower and when i move it in model view it works fine, they stay together. Norton, design of machinery introduction to cam design. With so few miles over its 5 years or so of existence it has no dealer service history. Check for potential problems by installing a clean and well oiled cam and lifter set in the block and turning the cam over with a speed handle. The cam and follower mechanism is widely used for operating the inlet and exhaust valves of internal combustion engines. Each cam has its own roller, but the rollers are mounted on the same reciprocating or oscillating follower. 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. Pdf lubrication analyses of cam and flatfaced follower.
Different cam profiles are available which can alter the timing, volume, and duration of the pump shot. Cam and follower design basics design of cam profiles and. Standard stud cam followers are recommended where loads and shock are moderate. Cam and follower mechanism in engine theory of machines. Mcgill products provide solutions to a wide variety of industrial applications. Uniform velocity the cam follower rises and falls at a constant speed. Most suitable as a guide roller for cam mechanisms and linear motion of automated machines and dedicated machines. Mcgill cf 58 n sb flat cam follower inch camrol cf series, 0. To overcome this problem, a design methodology is proposed here to overcome. Request for material recommendation for cam and follower request for material recommendation for cam and follower.
Follower driven in a cam follower pair, the cam normally rotates while the follower may translate or oscillate. 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. Cad design is downloaded to cam in discrete increments by computer numerical. The cam is the driver member and the follower is the driven member. The follower shown in figure 4 c is a flatfaced follower.
Accuracy cam followers are manufactured with the dimensional tolerances shown in table 4. Before going to the actual design of cam profile, lets look at the basic terminologies. My 2009 griso 1200 has only done a couple thousand miles and is running just fine. The crowned style cam follower is used where the track may not be exactly aligned and square with the cam follower. Although we checked the errors, but if you mark some error, let us known in the comment box. The material in this ebook also appears in the print version of this title.
Apr 26, 2017 i am trying to find the theoretical acceleration of a flat faced cam follower but it keeps flying off when i simulate it. If it suffers the dreaded cam follower problem, is it much of a problem to fix it myself. The driver is called the cam and the driven member is called the follower. Your cam will be toasted as well, even if you can see any visual damage beside, why take the chance. A free powerpoint ppt presentation displayed as a flash slide show on id. Some say lubrication, some say parts quality, some say corrosion. It is known that geometric parameters such as the base circle of the. Cam mechanisms are widely used because with them, different types of motion can be possible.
Clearance the radial internal clearances of cam followers are shown in table 4. Cam and follower design basics design of cam profiles. 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. Vgroove cam followers operate at higher speeds than other cam followers. Computer aided kinematic analysis and simulation of the cam follower mechanism m v ingalkar 1 and c r patil corresponding author. Learn vocabulary, terms, and more with flashcards, games, and other study tools. While technicians were working on them, i took a bunch of pictures and wanted put together a simple write up to show you guys how this failure happens, what the consequences are, the repair scale, and preventative measures. The accuracy of the output or the follower will depend on the cam and follower being in contact at all times. The contact conditions can affect the performance of the cam follower system dramatically by means of severe wear. Followers are usually selected to have standard shapes so it is. A common example of a cam follower is a keycutting machine that uses one key as a cam for cutting a copy of the key. Our standard integral flange construction of stud version bearings helps maintain bearing. The lifters should rotate and, if they dont, look down through the lifter bores and see if the bores are offset correctly relative to the cam lobe. Mcgill camrol cam follower bearings ahr international.
This analysis is an important step for fixing an optimum size of a cam 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. Remember, it may take a balance of both cam follower and spring adjustments to get the system working best for the application. A camfollower mate is a type of tangent or coincident mate. A cam is a mechanical device used to transmit motion to a follower by direct contact.
The cam follower is a compact bearing with a highrigidity shaft and a builtin needle bearing. Two technicians are diagnosing a problem with an ohv v8 with flatbottom lifters. Application of cam and follower types of cams types of cam followers concept and definition. This video explains how to draw displacement diagram in case of follower motion with s. Cam profile draw,for simple harmonic motion youtube. Mcgill cam followers have become known as a global leader as well as mcgills needle bearings and spherical roller bearings and cam yolk. This should take care of the stress problems at the cam lowpoint, and then free things up so there is more flexibility with what can be done at the cam midpoint to. Mcgill has an enormous inventory with ready to ship bearings and cam followers in the power transmission. Crxbec eccentric stud crowned hex slot emerson bearing. Simple line follower robot complete project report ebook free download pdf. Mar 18, 20 introduction of cams and types of cam and followers.
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. Pdf the principal factors that affect the characteristics of contact problem between cam and follower vary enormously during the operating cycle of. Mcgill was established in 1937 when the first cam follower was invented in the needle bearing style. The geometry of cam follower systems page 1 engines. Mcgill is the one source solution for all your cam follower needs. I used photos posted by him quite extensively in this document and the process as a general guide with some notations. Cams are widely used as low cost control systems, such as clothes washers and dryers. 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. Vgroove cam followers vgroove cam followers carry both radial and axial loads, compensate for misalignment, and absorb heavy shocks. A cam follower mate is a type of tangent or coincident mate. Optimum design of camroller follower mechanism using a new.
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. Mcgill offers the broadest range of cam follower bearings in the marketplace. The lifters should rotate and, if they dont, look down through the lifter bores and see if the bores. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate.
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. They have vshaped grooves and follow a vtrack in conveyor systems. Feb 03, 2016 however, a roller follower can possibly jam during steep cam displacements. Regal is a leading supplier of high quality bearings and accessories designed to fit a wide variety of applications and work conditions. Modelling, design and analysis of cam and follower a. 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. Slightly bend the cam follower to adjust for linkage that bottoms out. So if we want the cam to reach a maximum velocity of 10 thou per degree of rotation the cam follower must have a. The optimum design of a cam mechanism is a very interesting problem in the contact mechanics today. The shape of the cam and follower combine to define the displacement function. They have formulated these problems as a quadratic problem formulation and a linear programming. This type of follower can be used with a steep cam motion and does not jam.
Instruction manual to download this manual or others. 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. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. We had a similar problem and there seems to be no clear explanation why it happens. The following picture shows three followers which stay in contact with the cam as it rotates. A flatfaced follower consists of a follower that is formed with a large, flat surface available to contact the cam. Design of cam and follower system using basic and synthetic curves. Here we are presenting some solved problems based on cam profiles. Camrol inch dimension cam followers are available from 1 2. Cam and follower the linear cam moves backwards and forwards in a reciprocating motion. This paper presents a method for designing of a radial cam on the worksheet of mathcad including the calculation of follower s displacements, values of its velocities and accelerations, the optimization of the contour of a cam by choosing the. The cam converts rotary motion of one element into reciprocating linear motion or into oscillatory motion. Although cam synthesis problems in which the cam is constrained by the. The basic purpose of using the cam follower is converting the rotary motion of the cam to.
Ppt cam and follower powerpoint presentation free to. They eliminate problems of clearances, preloading and wear compensation. Depending on how long you run the engine once the tappets shit the bed, you dont need to mess with the valves and its easy to replace if you decide to go with the same oem flat tappet cam setup. A follower runs over the complex shape of the surface and generates a corresponding translation or rotation. This will prevent any drivability problems that could be. The contact conditions can affect the performance of the camfollower system dramatically by. Example of cam action concept and definition of cam. Eccentric studs allow for a more precise mounting and alignment. Lee and patterson 1995 conducted a more detailed mixed lubrication analysis for the camroller contact by considering the surface roughness effect on the elastohydrodynamic film thickness. I am trying to find the theoretical acceleration of a flat faced cam follower but it keeps flying off when i simulate it. The roller friction coefficient at the camfollower interface is in the order of 0. Introduction of cams and types of cam and followers. Predictions of cam follower wear in diesel engines. However, the manufacturing of cams is expensive and the wear effect due to the.
Learn fundamental concepts and terminology learn how to. Request for material recommendation for cam and follower request for material recommendation for cam and follower john2004 mechanical op 23 mar 06 19. You can see an application of the cam follower in another article here about the internal combustion engine. Technician b says that the lifter is worn and must be replaced.
One response to kinematics of the camfollower mechanism. They are available in two basic mounting styles for use in mechanical automation or linear motion applications. Appendix e cadcam for a medical instrument cam mechanism. Various types of cam follower are used for different types of applications. Technician a says that the camshaft is worn and must be replaced. They all buy a cam and follower set from lycoming and install it. It allows you to mate a cylinder, plane, or point to a series of tangent extruded faces, such as you would find on a cam. I think cam and follower spalling have not much to do with the engine shop. Optimal design and sensitivity analysis of flexible cam mechanisms. 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. Nut, washer, and grease nipple are available as accessories. The valve covers have been removed and the engine is running. Cam is a very important topic in the kinematics of machines or theory of machines. So if we want the cam to reach a maximum velocity of 10 thou per degree of rotation the cam follower must have a radius of at least 10 x 57.
Camfollower report final me 4201 machine design lab. Feb 16, 2017 4b engineers whtsapp group for 2020,2021,2022 pass out students 4b engineers whtsapp group 2019 pass out stu. I would like to thank bj mcgee for posting the original photos and providing the stepbystep instructions on how to replace the cam follower. 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.