When there is a requirement of a small amount of flexibility or angular moment, knuckle joint is used. System is used in order to gain the advantage over simple manufacturing of. Design of cotter joint to connect piston rod and crosshead. Always buy new cotter pins whenever you need to install or adjust them. A bolted joint adds to a part count a bolt, a nut, washers, thread lubricant, thread locking compound.
Cotter joint is used to connect two rods or components which are subjected to tension or compression. Dimensions can be determined using these empirical relations and the strength equations can be then used as a check. What are the applications of sleeve and cotter 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.
Oddly enough, a common joint venture mistake often cited by participants in failed joint ventures is cutting yourself too good a deal. Due to wedge action there is very strong tightening force which prevents loosening mf parts. Difference between temporary joining and permanent joining. A cotter is a term for a clump of tangled hair or animal fur, in some parts of northern england. It includes the various applications of the joints and also the comparison of the joints. It is assembled by hammering in the cotter and dismanteled by removing cotter. And the bolts, nuts, and washers come in specific sizes with specific threads, with specific hole sizes and tolerances, for specific applications if you need a high quality joint, youve got to keep track of all that and make sure the. A joint venture created to complete a certain task or project. Cotter joint is widely used to connect the piston rod and crosshead of a steam engine, as a joint between the piston rod and the tailor pump rod, foundation bolt, etc. Very high tightening force due to wedge action, which prevents loosening of parts in service. Cotter joint a detachable joint that is fastened or adjusted by a wedge. Design a cotter joint of socket and spigot type, which may be subjected to a pill or push of 30 kn. 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. In a socket and spigot cotter joint, one end of the rods say a is provided with a socket type of end as.
This joint is the simplest cotter joint in existence. A simple simulation of one type of joint in the mechanisms. So you can deliberatley make a bear with loose joints, so the arms swing around, or you can joint tight. 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. Cotter joints may be used in areas subject to corrosion during operation, resulting in difficulty in turning rusty bolts and nuts of threaded connections. Cotter joints use a transverse wedge with cylindrical or conical surfaces, and a longitudinal wedge. The assembly consists of inserting the spigot end into the socket end and putting the cotter into their common slot. 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.
It is quite rigid and can take both tensile and compressive loads. If you have to make many joints or mass produce a product, it is a good idea to test different joint solutions in the material before finalising your design. Strength of temporary joint is comparatively lower. The advantage is that they quite a bit stronger than a butt joint. Aug 17, 2009 7 bolts offer much better joint quality than a screw, mostly because the threads are more tightly controlled. 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.
Universal joint is a positive mechanical joint used for connecting shafts, whose axes are inclined at an angle to each other. A double r iveted joint is th at in which th ere are tw o rows of riv ets in a lap joint a s shown in fig. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 9. Function a cotter joint is used to connect one end of a rod is provided with a. There is no relative angular movement between rods.
Many joint ventures are corporations or limited liability companies. Revenues, expenses and asset ownership usually flow through the joint venture to the participants, since the joint venture itself has no legal status. 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. Cotter joint is used to connect two rods subjected to axial tensile or compressive loads. Apr 08, 2017 design procedure of cotter joint, socket and spigot joint design of machine duration. Rectangular rods and dissimilar cylindrical rods cannot be connected using. Advantages and disadvantages of joint ventures joint ventures are one of the most popular entities used to respond to tenders in south africa. A cotter joint is a simple and compact connection and is easily assembled and disassembled. Formed with an agreement which outlines the rights and obligations of every involved party, it is a common structure used to explore new opportunities while limiting the personal risks involved. This paper presents a theoretical model and a simulation analysis of bolted joint deformations. A cotter joint for connecting two rods along which tension or compression act is made with ends of the rod especially made. It has uniform thickness and the width dimension is given a slight taper. What are the advantages and disadvantages of a rabbet joint.
Knuckle joint, cotter joint and turn buckle the article contains the questions and answers related to the design of joints including knuckle joint, turn buckle and cotter joint. Cotter joint is widely used to connect the piston rod and crosshead of a steam engine, as a joint between the piston rod and the tailor pump rod, foundation bolt etc. This increases the bearing area and permits drilling while making the slots. May 02, 2018 cotter pins come in a variety of materials including steel, stainless steel and copper. When the cotter is hammered, the rods are drawn together and tightened. A cotter joint for connecting two rods along which tension. What are the advantages and disadvantages of bolting. See, a cotter joint can be used anywhere you require two shafts of circular, rectangular or square cross section, there are different ways how a cotter caan be used. The main advantages to using setscrews or tap bolts are the strength and tightness of the joints and the ability to tighten or loosen the joints without weakening the joint. Etsy is the home to thousands of handmade, vintage, and oneofakind products and gifts related to your search.
May 08, 2017 the cotter is usually made of mild steel or wrought iron. One rod end carries a spigot the end to be inserted while the other rod end is finished in form of a socket. The joint venture brings along many advantages to the firm as long as the objectives accomplished. For instance, when installing a cotter pin where corrosion is a problem, you may need to use stainless steel. So normally these are the different kinds of joints which uses cotter. Other than welding, rivet joint and adhesive joint are also permanent joining processes. Autocad mechanical practice drawings pdf free download.
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. 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 collar the spigot is put inside the socket and the cotter is driven through the slots in socket and spigot ends. Disadvantages are that they take more skill and special tools to. What are the advantages of forming a joint venture. What is a cotter joints a cotter is a flag wedge shaped piece of steel. The question that arises is whether to use a joint venture or a consortium in responding to a tender. Mar 27, 2012 cotter and knuckle joints hareesha n g dept. A joint venture is a partnership and, like all partnerships, functions well and rewards the participants best if it is structured as a.
It has socket end,spigot end and cotter as main parts. Permanent joining is beneficial where joint is intended to stay fixed for longer period. Partnering with a business that has complementary abilities and resources, such as finance, distribution channels, or technology, makes good sense. Cotter joint uses one or two cotters to connect two rods rigidly transmitting forces and motion, with no rotation of the rods 3. Let us look at some of the advantages of a joint venture that mentioned below. No matter what youre looking for or where you are in the world, our global marketplace of sellers can help you find unique and affordable options. Someone please correct me if im wrong, ive never used a plastic safety joint. The cotter key is used with a special nut and bolt that contains a hole for the key. What are the practical application of cotter joint. It is also known as universal coupling, u joint, cardan joint and hookes joint. Cotter joint the cotter joint offers the following advantages. 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. The applications of the sleeve and cotter joint is the joint between the piston rod and crosshead of the engine. Among temporary joining processes, fasteners, cotter joint, knuckle joints, etc.
Advantages of cotter joints cotter joints can be easily made, and the parts always occupy exactly the same relative positions after reassembly the joints can be used to connect similar pipes tubes. Instructions the parts and assembly of the cotter joint is. Temporary joining is beneficial where frequent assembly and disassembly are required. Depending on the type of application, the shapes of the parts of universal joint may vary. This is a small cylindershaped device that is typically inserted into a hole to prevent movement. Here are some of the key advantages and disadvantages of a joint venture to consider.
Autocad mechanical practice drawings pdf free download autocad exercise book. Socket and spigot cotter joint and its design engineers. An even tighter fit can be achieved with the third solution. 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. Hello dosto, mera name h ankit ras aur le k aaya hu mechanical guru ka ek aur latest episode aur ajj hum baat karenge.
Some standard proportions for dimensions of the knuckle joint are taken as. Pros and cons of welded joint are discussed in the following. Despite presence of many alternative processes, welding offers many advantages over others. Cotter joint article about cotter joint by the free. In the whole assembly the cotter is the part with least material and easy to replace, hence for this economical and practical reason cotter is kept weakest, so that it can be replaced on failure.
Now this kind of cotter joint is known as a socket and spigot type cotter joint. The cotter is locked in position by means of a screw as shown in fig. It is not suitable to connect rotating shafts which transmit torque. Cotter river, a river in the australian capital territory. Sleeve cotter joint pdf the working of the cotter andsleeve and cotter and gib are shown below. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. The joint can also be used to connect similar pipes, tubes. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. It is not at all suitable to connect rotating shafts which transmit torque. 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. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
A permanent joint cannot be dismantled without breaking parts. Also choose the size of the cotter pin according to the size of the hole. Cotter joint article about cotter joint by the free dictionary. Square key of side d4 each and length l is used to transmit torque t from the shaft of diameter d to the hub of a pulley. It is essential to properly install a cotter pin it can mean the difference between life and death when working with machinery or structural assemblies. Cotter gets locked because of the frictional force of the contacting surfaces. The assembly and dismantling of parts of the cotter joint is quick and simple. Following are the three commonly used cotter joints to connect two rods by a cotter. A joint venture, like a general partnership is not a separate legal entity. Unlike the universal joint, a cotter joint does not allow angular.
Taper is usually 1 in 24 and provides mainly two benefits. Select the correct cotter pin material for your project. Cotter joints are used to connect two rods, subjected to tensile or compressive forces along their. Aim design and drawing of cotter joint function a cotter joint is. Oct 20, 2009 cotter jointsnut and bolts are more traditional and they give you more control on how tight or loose a joint is. The ends are normally made by forging and rectangular hole is also created. 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. However, if the joint is guided, the rods may support a compressive load. A cotter is essentially a tapered piece of mostly the same material as that of the shaft, the cotter is accompanied by a sleeve or a gib which gives rises to components that use sleevecotter or gibcotter joint. Socket and spigot cotter joint is used to connect circular rods. Cotter joint these types of joints are used to connect the end of a rod or bar to a shaft. If you have very long joints, it can be a good idea to make the arcs longer. The main advantages to using setscrews or cotter pins is that you only need to have access to one end of the joint in order to tighten or loosen them. Knuckle joint has mainly three components eye, fork and pin as shown in figure 8.
Joints types of joints temporary joint semi permanent joint. Cotter joint is widely used to connect the piston rod and crosshead of a steam engine, as a joint between the piston rod and the tailor pump rod. Advantages of cotter joints cotter joints can be easily made, and the parts always occupy exactly the same relative positions after. To help you with this we have compiled a list of advantages and. Cut section of socket and spigot joint 3272012 2 hareesha n g, dsce, blore78. What are the advantages and disadvantages of bolting against. Cotter joint is used to connect two rods subjected to compressive or axial tensile loads. Some of the parts are a bit more challenging than others, but none of them are meant to be difficult. Once the joint venture has met its goals the entity ceases to exist. The assembly consists of inserting the spigot end into the. The low chamfer angle of the wedge assures tightness of the joint and provides selfbraking, which prevents the wedge from falling out. Manufacturing method of cotter joint copy free download as powerpoint presentation. All the parts of the joint are made of the same material with the permissible stresses, 55 mpa in tension, 70 mpa compression and 40 mpa in shear. Design procedure of cotter joint, socket and spigot joint.
A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. Mar 06, 2017 hello dosto, mera name h ankit ras aur le k aaya hu mechanical guru ka ek aur latest episode aur ajj hum baat karenge. It is also known as universal coupling, ujoint, cardan joint and hookes joint.
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