Permissible shear stress for the cotter material, and. The design procedure for knuckle joint was explained in. Design of cotterknuckle joint, threaded and riveted joint, eccentric loading. The permissible stresses for knuckle pin are 110 mpa and 55 mpa. Machine design unit 4 design of riverted cotter knuckle.
Design of solid and hollow shafts based on strength for torsion, bending and combined loads. Here, catia v5 software is used to create components of knuckle joint. For analysis, it is intended to design the model of knuckle joint in cad software. Cotter joint socket and spigot, knuckle joint pin joint for two rods. Various cases have been reported of failures in a knuckle joint due to poor design and strenuous loading condition. The student shall gain appreciation and understanding of the design function in mechanical engineering, the steps involved in designing and the relation of design activity with manufacturing activity. Mechanical joints may be temporary or permanent, most. In this lesson ajnan had given detailed explanation on 4 different modes of failure in knuckle joint components.
Video lecture on design procedure of cotter joint, socket and spigot joint from design of cotter joint, knuckle joint,levers and offset links chapter of design. There is always axial or linear line of action of load. Introduction to the design process factor influencing machine design, selection of materials based on mechanical properties preferred numbers, fits and tolerances direct, bending and torsional stress equations impact and shock loading calculation of principle stresses for various load combinations, eccentric loading design of curved. Secure data aggregation technique for wireless sensor. It is a mechanical joints which is used to become a fixed attaches to something or. Video lecture on design procedure of knuckle joint from design of cotter joint, knuckle joint,levers and offset links chapter of design. The structural design was carried out using solidworks software and then. College of energy and environmental engineering ceee.
Engineering metallurgy chapter 6 free download as powerpoint presentation. A cotter is a flat wedge shaped piece of rectangular cross section and its width is tapered either on one side or on both sides from one end to another for an easy adjustment. Two gaussian rvs x and y are jointly gaussian if their joint pdf is a 2d gaussian pdf. Sleeve cotter joint pdf the working of the cotter andsleeve and cotter and gib are shown below. Stresses in threaded fasteners, effect of initial tension, design of threaded fasteners under static, dynamic and impact loads, design of eccentrically loaded bolted joints. What is a cotter joints a cotter is a flag wedge shaped piece of steel. Design of knuckle joint a knuckle joint is used to connect two rods which are under the action of tensile load, when small amount of flexibility or angular moment is necessary. Pins, keys, splines, knuckle joint, cotter joint, design of threaded joints, initial tension, riveted joints, joints for pressure vessels, welded joints.
Before going into detailed steps to design the dimensions of the knuckle joint, it is essential to get oriented with all its components and their functions. A knuckle joint is a mechanical joint used to connect two rods which are under a tensile load, when there is a requirement of small amount of flexibility, or angular moment is necessary. Tech courses on pe starting from 2011 second year third semester a. Ppt knuckle joint powerpoint presentation free to view. The permissible tensile and shear stress for knuckle joint are 80 mpa and 40 mpa respectively. In this article, i am going to publish the detailed design procedure for knuckle joint. A cotter is a flat wedgeshaped piece of steel which is used to connect rigidly two rods which transmit motion in the axial direction tensile or compressive forces without rotation.
Since the cotter is in double shear, therefore shearing area of the cotter 2 b t and shearing strength of the cotter 2 b t equating this to load p, we have p 2 b t from this equation. Keywords cotter joint, design, modeling, analysi, catiav5r20, ansys r15. Engineering metallurgy chapter 6 hardness sintering. Threaded fasteners bolted joints including eccentric loading, knuckle joints, cotter joints welded joints, riveted joints. Translation dictionary english dictionary french english english french spanish english english spanish.
Develop parametric design and the conventions of formal engineering drawing 2. So in most of the design handbook the normal distribution taken is triangular. Introduction, design procedure, weight reduction of levers, handles and paddles, hand levers and foot levers, cranked levers 5. Download fulltext pdf a reweighted smoothed l0norm regularized sparse reconstructed algorithm for linear inverse problems article pdf available may 2019 with 12 reads. Courses of study indian institute of technology delhi. In cotter joint clearance is also provided between cotter and slots to allow driven cotter to draw two parts together cotter is tapered a to withstand back movement due to impact load b due to taper shape, it is easy to remove cotter and dismantle the joint c for having perfect assembly of this joint when cotter is inserted in slot through. Two 35 mm shafts of printing machine are connected by a flanged coupling. Examine a design critically and with understanding of cad the student learn to interpret drawings, and to produce designs using a combination of 2d and 3d software. Cotter and knuckle joint part 1 mechanical engineering. The column is to be supported on concrete pedestal of m 20 grade.
The field of evolutionary medicine examines the possibility that some diseases are the result of tradeoffs made in human evolution. Design of various types of riveted joints under different static loading conditions, eccentrically loaded riveted joints. The maximum permissible stresses are 55 mpa in tension. Allowable tensile stress 90 mpa allowable crushing stress 120 mpa allowable shear stress 60 mpa. Design of one way, cantilever slabs, continuous and two way slab unit i. Basic concept in design for flexure, assumptions, design constants. Designing and building furniture you have to consider a lot. Design a cotter joint to transmit a load of 90 kn in tension or compression. The failure of cotter joint may causes accident so it is necessary to design cotter joint to withstand under tension without failure. Failure of the socket in cotter and knuckle joints 435 fig.
Assume the following stresses for socket, spigot and cotter. Here is the diagram showing the exploded view of knuckle joint. In a sleeve and cotter joint, the cut slots are always made a little bit wider than the width of the cotters in order to promote wedging action of the cotters over the slots. Now in that class we have designed what is known as knuckle joint that is the. Tech in pe for the students who were admitted in academic session 20102011 1 recommended structure for forthcoming semester of b. Design of solid and hollow shafts for strength and rigidity design of shafts for combined bending and axial loads. Introduction to the working stress method of rcc design.
Sleeve and cotter joint, socket and spigot joint and. Human evolution and osteoporosisrelated spinal fractures. What is the difference between cotter joint answer sahil knuckle joint is used to connect two rods whose axes either coincide or intersect and lie in one plane, which are subjected to transmit axial tensile force on other hand cotter joint is used to connect two coaxial rods, which are subjected to either axial force or axial compressive. A cotter joint is a temporary fastening and is used to connect rigidly two co axial rods or bars which are subjected to axial tensile or compressive force. This document was uploaded by user and they confirmed that they. Visvesvaraya technological university scheme of teaching and examination and syllabus b. Selected experiments in applied mechanics laboratory. A design procedure of cotter joint cotter joint introduction before going into detailed steps to design and find dimensions of cotter joint, it is necessary to understand clearly the various components, their functions and assembly of cotter joint.
Lat lau lav lb lbr lc l cl ld ldg ldr lev lg lght lh lib lin ft lino lng lr ls lt left, angle laboratory ladder latitude laundry lavatory pound, pounds lumber laundry chute linen closet leader drain landing leader level long length left hand library linear. Also design the knuckle joint to carry axial tension of n. It is uniform in thickness but tapering in width, generally on one side only. Split muff coupling, protected type flanged coupling, pin bush type flexible coupling, oldhams coupling and universal coupling hooks joint l1, l2, l3 8. Writing introductory help requests is a key part of developing new professional connections, such as through email and other online messaging systems.
Design procedure of cotter joint, socket and spigot joint. Types of temporary joints cotter joints, knuckle joint and fasteners. This document is highly rated by mechanical engineering students and has been viewed 242 times. This paper presents the design and an experimental evaluation of introassista webbased tool that. Machine design unit 4 design of riverted cotter knuckle joints new free download as pdf file. The design procedure for knuckle joint was explained in this article. The knuckle joint assembly consists of the following major components. Design a knuckle joint to connect two circular mild steel rods which are subjected to a tensile load of 63kn. The knuckle joint is a type of joint which is used in steering system in between the steering rod and pinion of the steering gear, as the line of the action axis of both the mechanical parts are intersecting and lies in different planes, so it is. Cotter joint uses one or two cotters to connect two rods rigidly transmitting forces and motion, with no rotation of the rods. Failure occurs when the maximum normal stress is equal to the tensile yield. Following are the three commonly used cotter joints to connect two rods by a cotter.
The locking device may be a taper pin or a set screw used on the lower end of the cotter. Solve the design of circular rectangular water tank. The allowable limits of tensile, shear and crushing strength are 60 nmm2, 40 nmm2 and 75 nmm2. Manufacturers usually have a model number for each type of knuckle joint they manufacture. Knuckle joint assembly drawing sectional front top view mechanical drafting md knuckle joint design procedure problems and questions assembly drawing of knuckle joint knuckle joint assembly drawing in hindi easy way important for polytechnic engineering student machine drawing sleeve and cotter joint socket spigot knuckle joint drawing you machine. Hope you got clear explanation, if you like my efforts do share, rate and comment. Knuckle joint can be classified into a large number of types based on its size, shape, specification, application and other criteria. Most mechanical joints are designed to allow relative movement of these mechanical parts of the machine in one degree of freedom, and restrict movement in one or. A knuckle joint is used to connect two rods which are under a tensile load. Knuckle joint introduction, parts and applications. Spinal fractures are the most common osteoporosisrelated fracture in humans, but are not observed in apes, even in cases.
Pdf transient analysis and optimization of a knuckle joint. A cotter is a flat wedge shaped piece of rectangular crosssection and its width is tapered either on one side or both sides from one end to another for an easy adjustment. Design a cotter joint to connect two mild steel rods. The effective design of mechanical device or assembly demand the predictive knowledge of its behavior in working condition. Pdf knuckle joint is used to provide movement between rods while transferring force along the pin axis. After completion of this unit students are able to design cotter joint, knuckle joint and shafts. Design of joint objective questions ies, ias, gate cotters 1. Volume 6 archives international journal of engineering and. Oct 19, 2011 the field of evolutionary medicine examines the possibility that some diseases are the result of tradeoffs made in human evolution. What are the practical application of cotter joint. Unitii design under static loading simple elements like cotter and knuckle joints a. Joint k kal kc ks kw kitchen kalamein kitchen cabinet kitchen sink kilowatt l lab lad. Cotter and knuckle joints understanding engineers gallery.
Design of cotter jointssocket and spigot cotter joint only, knuckle joint, turn buckle. Sleeve and cotter joint, socket and spigot joint and knuckle joint drawn by r. It is required to design a cotter joint to connect two steel. Design of solid and hollow shafts for strength and rigidity design of shafts for combined bending and axial loads shaft sizes bis code. Design of cotter joint bending strength of materials. Aeronautical enginee iii effective from academic year 2018. Front and top view of knuckle joint evangelinterior. The cotter is usually made of mild steel or wrought iron. Threaded fasteners bolted joints including eccentric loading, knuckle joints, cotter.
Now this kind of cotter joint is known as a socket and spigot type cotter joint. Basic idea of design, factor of safety, modes of failure, theories of failure, design under static and fatigue loading. A cotter is a flat wedgeshaped piece of steel as shown in figure4. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. The effect of stress concentration due to the slot is neglected. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. Some standard proportions for dimensions of the knuckle joint are taken as. The taper varies from 1 in 48 to 1 in 24 and it may be increased up to 1 in 8, if a locking device is provided. Shall be able to choose proper materials to different machine elements depending on their physical and mechanical properties. Design procedure of knuckle joint design of machine. Magnetic properties magnetic properties of materials arise from the spin of the electrons and the orbital motion of electrons around the atomic nuclei. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Keys, keyways and splines rigid sleeve or muff, flange coupling only and flexible couplings universal coupling only.
Check the shear strength of the key against the normal strength of the shaft. Failure of cotter joint may causes accident, so it is necessary to design cotter joint to. A cotter joint is a temporary fastening and is used to connect rigidly two. Pdf a reweighted smoothed l0norm regularized sparse. About knuckle joint design procedure of knuckle joint ppt is not asked yet. The length of the strut between centre to centre intersections is 3 m. Very high tightening force due to wedge action, which prevents loosening of parts in service. As seen in the assembly the knuckle joint has main four parts. Rods, having axial tensile or compressive forces are connected by cotter joints. A cotter joints is a flat wedge link piece of steel of rectangular cross section which is inserted through the rods at high angle to their axes.
Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Mar 04, 2020 cotter and knuckle joint part 1 mechanical engineering notes edurev is made by best teachers of mechanical engineering. Match list i with list ii and select the correct answer using the code given below the lists. A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. Failure of cotter in shear considering the failure of cotter in shear as shown in fig. Electrical engineering ug syllabus transformer capacitor. When there is a requirement of a small amount of flexibility or angular moment, knuckle joint is used. Dimensions can be determined using these empirical relations and the strength equations can be then used as a check.
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