Dec 21, 2017 design of socket and spigot cotter joint part number name of part 1 shaft or rod 2 socket 3 spigot 4 cotter 5 socket collar 6 spigot collar mr. The bearing stud is tapered and threaded, and fits into a tapered hole in the steering knuckle. Cotter joint article about cotter joint by the free. Let a be the event it rains today and b be the event that it rains tomorrow. Sleeve and cotter joint is a type of joint used to typically connect two similar coaxial cylindrical rods. Cotter joints may be used in areas subject to corrosion during operation, resulting in difficulty in turning rusty bolts and nuts of threaded connections. Design of gib and cotter joint for strap end of a connecting rod. Cotter joints can be quickly assembled as well as disassembled. Spigot joint article about spigot joint by the free. Spigot joint article about spigot joint by the free dictionary. It is required to design a cotter joint to connect two steel rods of equal diameter. The locking device may be a taper pin or a set screw used on the lower end of the cotter.
These effects result from the way the joint is loaded, as well as how the joint responds to the load. Cotter joints are used to connect two rods, subjected to tensile or compressive forces along their. Joints between the piston rod and the cross need of the steam engine. Design of cotter joint bending strength of materials scribd. Clean joint clean the joint thoroughly with a rag and then apply plenty of grease to the gasket. Design a socket and spigot joint to resist a tensile load of 28 kn. This ensures tightness of the joint in operating condition and prevents loosening of the parts socket and spigot cotter joint notation used. 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. Rods may be of different cross sections like circular or square.
Spigot and socket joint definition and meaning collins. In this case one end of the first rod is enlarged in diameter to some. Computer aided design using any sotware such as auto cad ideas etc. Basic elements design types of key and design, design of socket. It is a multivariate generalization of the probability density function pdf, which characterizes the distribution of a continuous random variable. It is not used for connecting shafts that rotate and transmit torque.
All the parts of the joint are made from same material with following allowable stresses. Joint design joint design loads can be applied to bolted joints in a number of different ways, each of which produces unique effects on the joint. The joint is made by caulking in spun yarn jute and then filling the remainder of the joint space by molten lead and then thoroughly caulking the lead. An introduction to the analysis and design of bolted. Design of socket and spigot cotter joint part number name of part 1 shaft or rod 2 socket 3 spigot 4 cotter 5 socket collar 6 spigot collar mr. Based on these three stated assumptions, we found the conditional distribution of y given x x. The joint probability density function joint pdf is a function used to characterize the probability distribution of a continuous random vector. Socket and spigot cotter joint is used to connect circular rods. It contains a sleeve and two wedge shaped tapered cotters. Describe procedures associated with the welding process. It is usually used in connecting a piston rod to the crosshead of a reciprocating steam engine, a piston rod and its extension. The molten lead solidifies quickly and makes the joint water tight.
P load on the joint or pull acting on rods, d diameter of the rod, d1 outer diameter of socket,d2 diameter of spigot or inside diameter of socket, d3 outside diameter of spigot collar,d4 diameter of socket collar, t1 thickness of spigot collar, a distance from the end of the slot to end of spigot, c thickness. Problem 3 two rod ends of a pump are joined by means of a cotter and spigot and socket at. The design of these types of joints are discussed, in detail, in the following pages. Sleeve cotter joint pdf the working of the cotterandsleeve and cotterand gib are shown below. While the items shown in table 1 are those in regular production at the publication date and the commonly used sizes are normally stocked, this handbook is not a stock list. 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. Shearing away of socket if dw example draw two socks at random, without replacement, from a drawer full of. Muttagi, slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Spigot and socket joint, joints in water supply pipes. A cotter is driven tightly through the slots in the rods which are kept slightly mis aligned. Mathematics stack exchange is a question and answer site for people studying math at any level and professionals in related fields.
Notch sensitivity, design stress for variable and repeated loads, fatigue stress concentration factor, endurance diagrams. Cotter joint is used to connect two rods or components which are subjected to tension or compression. The joint cumulative function of two random variables x and y is defined as fxyx, y px. Is there still some simple rule to differentiate this and get the pdf.
The joint cdf has the same definition for continuous random variables. Following are the three commonly used cotter joints to connect two rods by a cotter. An introduction to the analysis and design of bolted connections. Sleeve cotter joint pdf the working of the cotter and sleeve and cotter and gib are shown below. 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 of cotter joint free download as powerpoint presentation. Joint distributions statistics 104 colin rundel march 26, 2012 section 5. Appropriate slots are cut in the sleeve and in the cylindrical rods. Design of socket and spigot joint bending mechanics. Describe the different types of welded joint designs. Allowable tensile stress 90 mpa allowable crushing stress 120 mpa allowable shear stress 60 mpa. Pdf process design of a ball joint, considering caulking. A ball joint consists of a bearing stud and socket enclosed in a casing. The cotter is usually made of mild steel or wrought iron.
This increases the bearing area and permits drilling while making the slots. Notice that taking the complement doesnt give the joint cdf, so we cant just differentiate and flip signs. The maximum permissible stresses are 55 mpa in tension. Design procedure of cotter joint, socket and spigot joint. Instructions the parts and assembly of the cotter joint is.
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 end of the rod which goes into a socket is also called spigot. Cotter joint a detachable joint that is fastened or adjusted by a wedge. Nov 07, 2009 design procedure for the spigot and cotter joint to understand the design steps let take a question and solve it step by step. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 9. Design of socket and spigot cotter joint the socket and spigot cotter joint is shown in fig. Design a helical compression spring for a maximum load of n for a deflection of. What are the practical application of cotter joint. The computeraided design cad files and all associated. Describe procedures associated with expansion and contraction. 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.
Basically, cotter joint is used in which there is no angular displacement between two rod o the other hand the knuckle joint is used in which there is necessity of angular displacement for e. We have already seen the joint cdf for discrete random variables. Based on the four stated assumptions, we will now define the joint probability density function of x and y. Interpret the different types of diagrams associated with welding. Some of the various load types include tensile, shear and bending. A cotter joint is a simple and compact connection and is easily assembled and disassembled. Mar 01, 2016 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. Cotter joints cotter is a flat, wedgeshaped piece of steel cotter joint uses one or two cotters to connect two rods rigidly transmitting forces and motion, with no rotation of the rods applications. X and y are jointly continuous with joint pdf fx,y e. Ch12 contents contents cotter and knuckle joints c h a p t.
The cotter is locked in position by means of a screw as shown in fig. In a socket and spigot cotter joint, one end of the rods say a is provided with a socket. Assume the following stresses for socket, spigot and cotter. One of the rods is formed into a socket by enlarging its end while the other rod, called spigot end is formed with enlarged diameter and an integral collar the spigot is put inside the socket and the cotter is driven through the slots in socket and spigot ends. Anuj gupta introduction a cotter joint is a temporary fastening and is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. The socket and the spigot are provided with a narrow rectangular slot. A socket is formed by expanding the end of one rod in which the spigot end of the other rod is inserted. Determine the joint pdf from the conditional distribution and marginal distribution of one of the variables. All values are for oil quenched condition and for single heat only.
Design of cotter joint bending strength of materials. They are used on virtually every automobile made and work similarly to the ball and socket design of the human hip joint. Cotter and knuckle joints understanding engineers gallery. Design a cotter joint subjected to a tensile load of 35 kn and a. Design of gib and cotter joint for strap end of a connecting. Worked examples multiple random variables example 1 let x and y be random variables that take on values from the set f. Cut bevel cut a 65 0 bevel approx in the spigot end. Spigot is formed on one of the rods and socket is formed on the other. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.
The low chamfer angle of the wedge assures tightness of the joint and provides selfbraking, which prevents the wedge from falling out. Spigot and socket jointcotter joint rods, having axial tensile or compressive forces are connected by cotter joints. Cotter joint article about cotter joint by the free dictionary. An approach to design of cotter joint using genetic. Design of socket and spigot cotter joint linkedin slideshare. Socket and spigot cotter joint is connecting two rods in such a way that it can transfer axial compression or tensile load. Gib and cotter joint socket and spigot cotter joint p load carried by the rods, d diameter of the rods, d 1 outside diameter of socket, d 2 diameter of spigot or inside diameter of socket, d 3 outside diameter of spigot collar, t 1 thickness of spigot collar, d 4 diameter of socket collar, c. Connection of piston rod to the crosshead of an engine, pump or compressor connection of a valve rod to its stem a rod connecting a steam cylinder to a base plate in a marine engine in a cotter. Aim design and drawing of cotter joint function a cotter joint is. Cotter joints use a transverse wedge with cylindrical or conical surfaces, and a longitudinal wedge.
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