After aligning the socket and spigot ends, a cotter is drivenin through the slots. What are the applications of socket and spigot cotter joint. The two ends of the pipes which are to be jointed together are brought in perfect level near one another and after placing one hard rubber washer between flanges are bolted. Joints used in pipes water conveyance water engineering. Socket and spigot cotter joint is used to connect circular rods.
Cotter joint is widely used to connect the piston rod and cross head of the steam engine, so as a joint between the piston rod and the tailor pump rod, foundation bolt etc. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. Let, p load carried by the rods, d diameter of the rods. Design procedure of cotter joint, socket and spigot joint. 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 socket cotter spigot. Mar 30, 2017 socket and spigot cotter joint is connecting two rods in such a way that it can transfer axial compression or tensile load. The ends are normally made by forging and rectangular hole is also created.
China spigot and socket joints manufacturers select 2020 high quality spigot and socket joints products in best price from certified chinese expansion joint manufacturers, ductile iron pipe suppliers, wholesalers and factory on. The subject of this project is the modeling and analysis of cotter joint. Failure of cotter joint may causes accident, so it is necessary to design cotter joint to withstand under tension without failure the effective design of mechanical device. A cotter is driven tightly through the slots in the rods which are kept slightly mis aligned. Appropriate slots are cut in the sleeve and in the cylindrical rods. Cotter joint uses one or two cotters to connect two rods rigidly transmitting forces and motion, with no rotation of the rods 3. Cotter joint is used to connect two rods subjected to axial tensile or compressive loads. In a socket and spigot cotter joint, one end of the rods say a is provided with a socket type of end as shown in fig. Cotterjoints for circularrods socket and spigot joint ii cotterjoints for roundrods sleeve and cotter joint iii cotterjoints for square rods gib and cotterjoint 3.
Cotter joint is widely used to connect the piston rod and cross head of. Socket and spigot cotter joint 3d cad model library. A spigot joint is a type of pipe fitting connection that is inserted into another pipe fitting. In this case one end of the first rod is enlarged in diameter to some. Socket and spigot cotter joint the socket and spigot cotter joint is shown in fig. Cotter joints socket and sleeve and cotter gib and cotter 4. One end of the rod is formed into a socket and the other into a spigot fig. Socket and spigot cotter joint and its design engineers gallery. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Cotter is then motivated firmly during a hole in order to create passing connection among. A cotter joint for connecting two rods along which tension or compression act is made with ends of the rod especially made. The sliding rubber ring is installed using a soft soap lubricant.
In this, the rod ends are modified instead of using a sleeve. For example two rods may be joined coaxially and when they are pulled apart they should not. A cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. 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. The socket and the spigot are provided with a narrow rectangular slot.
China spigot and socket joints, spigot and socket joints. The assembly and dismantling of parts of the cotter joint is quick and simple. Cotter joint is used to connect two rods or components which are subjected to tension or compression. 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.
Spigot is formed on one of the rods and socket is formed on the other. It contains a sleeve and two wedge shaped tapered cotters. Cotter joint is used to connect two rods subjected to axial tensile or. A cotter joint is temporary fastening and using to connect rapidly two coaxial rods or bars which are.
Cotter joint is widely used to connect the piston rod and cross head of the steam engine, so as a joint between the piston rod. Spigotandsocket joint article about spigotandsocket. Socket and spigot cotter joint is connecting two rods in such a way that it can transfer axial compression or tensile load. Cotter joint the cotter joint offers the following advantages. A socket is formed by expanding the end of one rod in which the spigot end of the other rod is inserted. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. Cotter and knuckle joints understanding engineers gallery. Design of cotter joint cotter joint is also called as socket and spigot joint. 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. Design procedure of cotter joint, socket and spigot joint design of machine. 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 as shown in fig 8. In knuckle joint the two views of which are shown in fig. Chapter 7 cotter and knuckle joints machine design.
Design procedure of cotter joint, socket and spigot joint design. Forsheda 140 lamell sliding rubber seal permits installation with very little force as there is lubricant enclosed within the seals sliding layer, thus there is no friction between. Sleeve and cotter joint is a type of joint used to typically connect two similar coaxial cylindrical rods. In a socket and spigot cotter joint, one end of the rods say a is provided with a socket type of end as. Apr 29, 2020 chapter 7 cotter and knuckle joints machine design, mechanical engineering mechanical engineering notes edurev is made by best teachers of mechanical engineering. The spigot end typically has the same outer diameter as the pipe and is usually fitted into another joint called a. Socket and spigot cotter joint sleeve and cotter joint. A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. The relative position of two bodies connected by a prismatic joint is defined by the amount of linear slide of one relative to the other one. Download as ppt, pdf, txt or read online from scribd.
Download as pptx, pdf, txt or read online from scribd. A spigotandsocket joint for connecting two pipes, comprising a socket end assigned to one pipe and into which a spigot end of the other pipe, which has a support strip, can be inserted and which has a radially inwardprotruding edge with at least one ring segmentshaped recess, and a locking device for locking the spigot end in the socket end. Socket and spigot cotter joint the socket and spigot cotter joint is shown in fig 2. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 9. This one parameter movement identifies this joint as a one degree of freedom kinematic pair. The load is usually acting axially, but it changes its direction and hence the cotter joint must be designed to carry both the tensile and compressive loads. A prismatic joint can be formed with a polygonal crosssection to resist rotation.
The assembly consists of inserting the spigot end into the socket end and putting the cotter into their common slot. Material of two rods and cotter is steel 30 c8 s yt 400nmm2, s yc 2 s yt and s sy 0. 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. Cotter joint socket and spigot joint it is used to connect two coaxial rods under the action of axial tensile or compressive loads. A cotter joint for connecting two rods along which tension or. The cotter is usually made of mild steel or wrought iron. Socket and spigot cotter joint socket and spigot cotter joint loading. Spigot and socket joint pipes are joined and sealed using either a rolling rubber or a sliding rubber ring respectively. Design of spigot and socket cotter let p load carried by the rods. This document is highly rated by mechanical engineering students and has been viewed 1586 times. Use onensks cotter ors sleeve and cotter joints questsm. Cotter joint has mainly three components spigot, socket and cotter as. Cotter joint piston tension physics free 30day trial.
What are the practical application of cotter joint. Each rod is subjected to an axial tensile force of 50 kn. Socket and spigot cotter joint and its design engineers. The disclosed spigotandsocket joint is characterized in that at least four recesses 26 to 29 are provided which are equidistantly disposed in the circumferential direction while the two locking elements are each fitted with two ring segmentshaped locking parts 52, 54 which are interconnected via one respective web 56. Following are the three commonly used cotter joints to connect two rods by a cotter. Sleeve cotter joint pdf the working of the cotterandsleeve and cotterand gib are shown below. Aim design and drawing of cotter joint function a cotter joint is. The socket and spigot cotter joint is shown in fig 2. Nov 07, 2009 cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. 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. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars. Design the joint assuming that the working stresses for both the pin and rod materials to be, 85 mpa in tension, 70 mpa in shear and 140mpa in crushing.
Keys, cotter and unit 5 key, cotter and knuckle knuckle. What is a cotter joints a cotter is a flag wedge shaped piece of steel. 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. One rod end carries a spigot the end to be inserted while the other rod end is finished in form of a socket. Cotter joint design procedure failure animations youtube. A socket is formed by expanding the end of one rod in which the spigotend of the other rod is inserted. Permissible shear stress for the cotter material, and. The effect of stress concentration due to the slot is neglected. The factor of safety for rods, spigot end and socket end is assumed as 6 while for cotter. Design a socket and spigot cotter joint to connect two steel rods of equal diameter. In this case one end of the first rod is enlarged in diameter to some length, just to compensate the loss of material due to rectangular hole made in it to accommodate a cotter. Joint between piston rod and crosshead of steam engine 2.
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