Design and machining of cylindrical cams with translating. Research article modeling and nonlinear response of the cam follower obliqueimpact system yongfengyang, 1 yulu, 1 tingdongjiang, 1,2 andnalu 1 institute of vibration engineering, northwestern polytechnical university, xi an, china. Analysis and usage of cams and their followers engineering essay. In chapter 9, a simple kinetostatic model of a cam follower system was presented. 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. Since the above limits do not equal 0, the sequence converges neither in the meansquared sense, nor in the. Probability foundations for electrical engineers july. The three terminals are called the source, drain, and gate. Cam and follower mechanism and their types mechanicalmaster. 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.
D r s1 s1 stud diameter outer main dimensions diameter outer ring width threaded overall length shoulder height f d model no. It is very hard to find the configuration of the complete mechanism as a function of orientation of the cam analytically. Select the reactions tab in the nodal value selection dialog to select nodal values for reactions for presentation. Fe analysis of tangent cam for different positions of the roller follower. Cam and follower surfaces in line contact are considered.
The general equations of curvature analysis for a 3link cam follower mechanism are based on the layout of the general coordinate systems, the matrix method, the basic kinematic relationship of contact surfaces, and the definitions of limit functions. Ignacio valiente, jose luis perez diaz, david mauricio alba lucero y efren diez jimenez. Hindi theory of machines for mechanical engineering by. The use of algebraic polynomials to specify the follower motion is a new choice for cam. Convergence of random variables and related theorems lim n. Computer aided design nptel online videos, courses iit. Cams convert rotaryoscillating or linear motion into a. Cam and follower, motion, mechansims, machine mechdesigner. Below are some animations of some cam mechanisms to illustrate how they generally work. Nov 25, 2014 a project report on cam follower utility in internal combustion engine 1. The algorithm is based on the concept that a cam and its follower must have a common normal at the contact point. Cam and follower are widely used in regulating, opening and closing of valves inlet and exhaust in the internal. Introduction to machine design, methodology, strength, rigidity, fracture, wear, and material considerations in design, use of standards, selection of materials and processes. Similarly, for camfollower mechanisms also we will restrict our discussion only to planar or two dimensional, that means all the points of the mechanism will move.
Nptel interact live with the course instructor prof. In this work an attempt is made to study the static as well as dynamic analysis of cam at low speed. Properly designed cam follower systems for industrial machine. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses. Industrial automation and control nptel online videos. Add contact forces to a cam follower mechanism modeled in simmechanics. 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. Eccentric type cam followers in these bearings, an eccentric collar is assembled. Cam mechanisms are widely used because with them, different types of motion can be possible.
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. What are the applications of different types of cam followers. Cam profile is improved such that the follower lift curve matches a desired polynomial equation at the desired design speed given the cam. An optimum design of cam mechanisms with roller follower for. Dynamic analysis of high speed cam follower system using matlab. Given planar cam profiles and follower types, this paper analyzes their displacement diagrams numerically. From now we will term cam and follower mechanism as cam. That model is sufficient for determining and thus avoiding by design the condition of gross follower jump due to inadequate spring force and or preload. Numerical analysis of planar cam follower mechanisms. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. Lecture series on industrial automation and control by prof. The method is based on the calculation of a harmonic transfer matrix for the system, using the prin.
So when theta and beta is zero, the spring on the follower does not resist the motion of the arm. So, if we draw a horizontal tangent to the base circle, this is the lowest position of the follower when this point s was vertical. Feel free to get in touch with us regarding any issue. A cam follower, also known as a track follower,1 is a specialized type of roller or needle bearing designed to follow cams. Modeling contact forces in a cam follower video matlab. In static analysis to study the deflection of cam and follower with. Cam follower with tapped greasing hole model cft b3. Instant centers of a cam and follower finding ics without using effective linkage. Cam may be rotating or reciprocating while a follower may be rotating, reciprocating and oscillating. Are you looking for nptel lectures on shear wall design.
On the basis of the theory of envelopes for a 1parameter family of surfaces, a cam profile with a translating conical follower can be easily designed once the follower motion program has been given. Another part associated with the cam is called follower. Introduction, types of cam, types of follower radial cam offset follower end cam types of cam and follower cam and follower real life examples cam and follower nptel cam and follower mechanism pdf. Cam and follower mechanism types and functions mechtics. Static structural and modal analysis of engine camshaft using. Pdf the cam and follower assembly is been used to convert rotating motion into reciprocating or oscillating motion. Apr 01, 2018 a cam is a mechanical member which impart desired motion to the follower by direct contact. Analysis and simulation of cam follower mechanism using polynomial cam profile pages. The size and the course of force of spring and also the course of force of pin are shown in figure 10 and figure 11. Jul 14, 2018 dont forget to share this lecture note book of cad cam among all your friends and also on your social media pages. Cam and follower, motion, mechansims, machine mechanical. For more videos click on playlist link shown below v kinematics of machinery komtom degree.
Nptel syllabus electrical machines i video course course outline synchronous machines. A project report on cam follower utility in internal. One response to kinematics of the cam follower mechanism. We are always there in your services and we will surely get back to you within minutes, if needed. Cams and followers video lecture from chapter cams and followers in theory of machine for mechanical engineering students.
The cam follower mechanism is versatile and almost any arbitrarilyspecified motion can be achieved. Cams can be classified based on the shape of the cams or the followers or the path that the follower traverses during the operation of the mechanism. Pdf fe analysis of tangent cam for different positions of. Analysis and simulation of cam follower mechanism using. Cam is a rotating element which provides an oscillation or reciprocatory motion to another part connected with the cam. Reactions nodal values robot structural analysis products. Abstracta frequency domain approach to dynamic analysis of traingirder interaction is presented. But, in the given problem follower is a floating link of a constrained mechanism. Cam and follower mechanism is a widely used method of motion transformation. However, the manufacturing of cams is expensive and the wear effect due to the contact stresses is a disadvantage.
If the mass and velocity of the follower as m1 and v1, and the cam mass velocity as m2 and v2 respectively. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Problem on offset knife edge follower cams and followers. A camfollower forms higher pair as they have point contact at the junction. Connections calculation note robot structural analysis.
Norton, design of machinery introduction to cam design. Cams classification of cams and followers, nomenclature, description and analysis of follower motion, pressure angle. Research article modeling and nonlinear response of the cam. In the last lecture, we have discussed cam follower systems and we have discussed two types of followers namely, translating follower and oscillating follower. Mechanical engineering kinematics of machines nptel. This analysis is an important step for fixing an optimum size of a cam and. Computer aided kinematic and dynamic analysis of cam and follower prof. 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. Cams convert rotaryoscillating or linear motion into a linear or reciprocating action to carry out useful work. Get details of nptel lectures on shear wall design. Indranil manna of iit kgp for the course surface engineering for corrosion and wear resistance. You can select the folowing force components for presentation. Frequency domain analysis of trainguideway interaction. This is the level from which the follower starts rising.
These are eccentric cam followers with a onepiece stud that can be mounted in the same mounting holes as those for standard type cam followers. Adjust the cam profile using matlab to vary the valve lift. Lecture notes on renewable energy sources subject code. Notes on the field effect transistor fet the fet is a three terminal device like the bjt, but operates by a different principle. At the bottom of the screen there are the following icons. Then the rates of change of velocity during impact as. Curvature analysis of spatial camfollower mechanisms. Bjt transistor modeling a model is an equivalent circuit that. Software for modeling cam and follower or servodriven packaging, assembly and textile machines, mechanisms with complex motion requirem mechdesigner, by psmotion, is machine design software for the modeling of packaging, assembly and textile machines. Stoddart 1953 improved this method and proposed that vibration of the follower of polydyne cam will be close to zero as long as there is sufficient spring force to keep it in contact.
Computer aided kinematic and dynamic analysis of cam and follower. After calculations of a connection are completed, a calculation note displays, which includes data about the connection and calculation results the results tab. Fixed bias, voltage divider, emitter follower configuration. A simple approach to the profile determination and machining of cylindrical cams with translating conical followers is presented. Cam follower mechanical engineering general discussion. The last step of dynamic analysis of cam mechanism was to find out some forces which operate in spring and also in pin labeled as a point a when is the cam mechanisms in motion. We collected most searched pages list related with nptel. Fx, fy, fz if selected, they add table columns to display reaction forces obtained during the structure analysis xaxis direction, yaxis direction or zaxis. Prepare for examinations and take any number of courses from various topics on unacademy an education revolution hindi theory of machines for mechanical engineering by mukesh agrawal unacademy plus.
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