Design a cotter joint subjected to a tensile load of 35 kn and a. Design procedure of cotter joint, socket and spigot joint design. Enlarged diameter of each rod by empherical relationship. Appropriate slots are cut in the sleeve and in the cylindrical rods. Study and analysis of pin of knuckle joint in train. Manufacturers usually have a model number for each type of knuckle joint they manufacture. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. State the different applications of the cotter joint. Knuckle joint definition of knuckle joint by the free. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. Design a cotter joint subjected to a tensile load of 35 kn and a compressive load of 40 kn. Failure of cotter in shear considering the failure of cotter in shear as shown in fig. The link drive system of the mml2 developed by schuler can be made very flexible during the design of the press.
Images are taken from version 2 me, iit kharagpur research paper. It is uniform in thickness but tapering in width, generally on one side only. These joints may be subjected to tensile or compressive forces along the axes of the rods. The cotter is usually made of mild steel or wrought iron. 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. It is a mechanical joints which is used to become a fixed attaches to something or.
Now this kind of cotter joint is known as a socket and spigot type cotter joint. Sleeve and cotter joint, socket and spigot joint and knuckle joint drawn by r. Design of joint objective questions ies, ias, gate cotters 1. Taper of cotter 1 in 25, and draw of cotter 2 to 3 mm. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. As seen in the assembly the knuckle joint has main four parts. Design of cotter joint free download as powerpoint presentation. Design of cotter joint animation cotter joint assembly drawing. Permissible shear stress for the cotter material, and.
The obvious example is on a bicycle where both pedal bars are separately locked by a. It may also be used to support the compressive load. The various proportions for the sleeve and cotter joint in terms of the diameter of rod d are as follows. Hai friends, the team members of srmechanicalupdates09 are not responsible for any errors,omissions,or damages arising out of use of this information. Chapter 7 cotter and knuckle joints machine design, mechanical engineering mechanical engineering notes edurev notes for mechanical engineering is made by best teachers who have written some of the best books of mechanical engineering.
The function of rivets in a joint is to make a connection. Cotter joints are the joints made with the help of cotter. 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. This increases the bearing area and permits drilling while making the slots. Apr 11, 2020 cotter and knuckle joint part 1 mechanical engineering notes edurev is made by best teachers of mechanical engineering. It is a kind of hinged joint between two rods, often like a ball and socket joint. For analysis, it is intended to design the model of knuckle joint in cad software.
Knuckle joint introduction, parts and applications. There is always axial or linear line of action of load. Your knuckles are the rounded pieces of bone that form lumps on your hands where your. Apr 08, 2017 application of cotter and knuckle joint. Cotter and knuckle joints 61 introduction 62 design of cottered joints a tension failure of the rods at diameter d b tension failure of the rod across slot c tension failure of the socket across the slot d shear failure of the cotter e shear failure of the rod end g crushing failure of the rod or the cotter.
Adjustable screwed joint for round rods turn buckle. A knuckle join t is used to conn ect two rods which are unde r the action of tensile loads. Study and analysis of pin of knuckle joint in train 1ravindra s. A knuckle joint is used to connect the two rods which are under the tensile load when there is requirement of a small amount of flexibility or when angular movement is necessary. Very high tightening force due to wedge action, which prevents loosening of parts in service. Ch12 contents contents cotter and knuckle joints c h a p t e r n 431 12 cotter and knuckle joints 1 introduction 2 types of cotter joints 3 socket. Join the grabcad community today to gain access and download. Nagpur abstract the current paper presents the problem of the failure of the knuckle pin in a railway coupling due to shearing. Now in that class we have designed what is known as knuckle joint that is the. Periasamy abstract the aim of the present project is to study the stresses in knuckle joint using analytical method. Cotter and knuckle joints understanding engineers gallery.
Cotter joint is used to connect two rods or components which are subjected to tension or compression. Watch next videos of design of cotter joint, knuckle joint,levers and offset links. A typical knuckle joint, its components and working principle. 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 of machine for mechanical. Explore the constraint window in inventor and assemble the ballandsocket joint. What are the practical application of cotter joint.
A cotter is a flat wedgeshaped piece of steel as shown in figure. 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. It contains a sleeve and two wedge shaped tapered cotters. Sleeve cotter joint pdf the working of the cotter and sleeve and cotter and gib are shown below. Knuckle joint is used to connect two rods whose axes either coincide or intersect and lie in one plane. Design of various types of riveted joints under different static loading conditions, eccentrically loaded riveted joints. Knuckle joint is used for connecting two rods whose axes. Feb 04, 2017 knuckle joint is a type of mechanical joint used in structures, to connect two intersecting cylindrical rods, whose axes lie on the same plane. Design of cotter joint bending strength of materials. Knuckle and ballandsocket joints indian institute of. Jul 17, 2016 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. Ch12 contents contents cotter and knuckle joints c h a.
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. Unit 2 design of temporary design of temporary connections. 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. View notes cotter and knuckle joint from none at lovely professional university. The knuckle joint assembly consists of the following major components. Knuckle joint is yet another to join rods to carry axial force. The examples of tapered keys are a taper sunk key b saddle key c. Sleeve cotter joint pdf the working of the cotter andsleeve and cotter and gib are shown below. Knuckle definition and meaning collins english dictionary. Here is the diagram showing the exploded view of knuckle joint. Design of temporary unit 2 design of temporary connections connections structure 2. 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. A knuckle joint is designed for increasing the capacity to withstand load. It is used to transmit axial tensile force and permits limited angular movement between rods, about the axis of the pin.
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 more others. 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. A free powerpoint ppt presentation displayed as a flash slide show on id. Eye is formed on one of the rods and fork is formed on the other. X and y are jointly continuous with joint pdf fx,y. Instructions the parts and assembly of the cotter joint is. Sleeve and cotter joint, socket and spigot joint and. During transportation variable stresses act on knuckle joint which causes failure of 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.
Cotter joint is a flat wedge shaped piece of steel. Knuckle joint has mainly three components eye, fork and pin as shown in figure 8. Some standard proportions for dimensions of the knuckle joint are taken as. Cut section of socket and spigot joint 3272012 2 hareesha n g, dsce, blore78. Ppt knuckle joint powerpoint presentation free to view. Which material is used for manufacturing of knuckle joint. Knuckle joint can be classified into a large number of types based on its size, shape, specification, application and other criteria. 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. The cotter is locked in position by means of a screw as shown in fig. Cotter joints are used to connect two rods, subjected to tensile or compressive forces along their. A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another.
View notes ch12 from mechanical 403 at anna university chennai regional office, coimbatore. Match list i with list ii and select the correct answer using the code given below the lists. Following are the three commonly used cotter joints to connect two rods by a cotter. Design and analysis of knuckle joint stress mechanics. This document is highly rated by mechanical engineering students and has been viewed 249 times. The joint allows a small angular moment of one rod relative to another. 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. The effect of stress concentration due to the slot is neglected. The material used for the cotter joint has following allowable stress values allowable stress in tension 50 mpa, shear stress 35 mpa crushing stress 90 mpa. Outside diameter of eye or fork mm thickness of each eye. Design procedure of cotter joint, socket and spigot joint design of machine duration.
It is specially designed to withstand tensile loads. The enlarged ends of the rods butt against each other with a common sleeve over them. Contents contents cotter and knuckle joints c h a p t e r n 431 12 cotter and knuckle joints 1. Explain the design process for knuckle joint with neat sketch. Chapter 7 cotter and knuckle joints machine design. Cotter and knuckle joint cotter and knuckle joints 431 1. Knuckle joint is widely used to connect valve rod and eccentric rod, in the link of a cycle chain, levers, tie rod joint for roof truss and many other links. This permits design of the motion characteristics in accordance with the requirements of the parts to be. A knuckle joint may be readily disconnected for adjustments or repairs. Dimensions can be determined using these empirical relations and the strength equations can be then used as a check.
Mechanical forging presses with knuckle joint partspecific motion characteristics. Knuckle joint by harsha vardhan punna s guided by dr. State the different applications of the knuckle joint. The parts and assembly of the knuckle joint and ballandsocket joint are shown below. Here, catia v5 software is used to create components of knuckle joint. Meaning, pronunciation, translations and examples log in dictionary. The design of these types of joints are discussed, in detail, in the following pages. 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. The design procedure for knuckle joint is made to calculate.
Cotter gets locked because of the frictional force of the contacting surfaces. Ch12 contents contents cotter and knuckle joints c h a p t. Knuckle joint is used to connect two rods subjected to axial tensile loads. Joint densities and joint mass functions example 1.
Machine design unit 4 design of riverted cotter knuckle joints new free download as pdf file. The material used for the joint may be steel or wrought iron. Machine design unit 4 design of riverted cotter knuckle. Design procedure of cotter joint, socket and spigot joint. This is used to connect rigidly two rods which transmit motion in the axial direction, without rotation. Mar 27, 2012 cotter and knuckle joints hareesha n g dept. Sleeve and cotter joint is a type of joint used to typically connect two similar coaxial cylindrical rods.
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