Design Of Cotter And Knuckle Joint Pdf Worked
File Name: design of cotter and knuckle joint worked.zip
- Mechanical joint
- Cotter and Knuckle Joints Understanding
- Machine Design Unit 4 Design of Riverted Cotter Knuckle Joints New
- Study & Analysis of Knuckle Joint with the Replacement of Material by Using Teflon
Design and analysis of knuckle joint stress mechanics. Design a knuckle joint for a tie rod of a circular section to sustain a maximum pull of 70 kn. Dec 18, 20 for the knuckle joint described in prob. Design of cotter joint animation cotter joint assembly drawing.
Design of various types of riveted joints under different static loading conditions, eccentrically loaded riveted joints. Design of Cotter joints. Design of Knuckle joints. Types of Fasteners: Permanent Fasteners 1. Welded Joints 2. Riveted Joints. Thread Joints a. Bolted Joints b. Screws Joints 2. Keys 3. Coupling 4. Pins Joints a.
Cotters Joints b. Knuckle Joints 5. Pipe Joints. The Fastenings may be classified into the following two groups: 1. The Permanent Fastenings are those fastenings which cannot be disassembled without destroying the connecting components.
The Temporary or Detachable Fastenings are those fastenings which can be disassembled without destroying the connecting components. Riveted Joints: The rivets are used to make permanent fastening between the two or more plates such as in structural work, ship building, bridges, tanks and boiler shells. The riveted joints are widely used for joining light metals.
A rivet is a short cylindrical bar with a head integral to it. The cylindrical portion of the rivet is called shank or body and lower portion of shank is known as tail. Notes also available at www. The function of rivets in a joint is to make a connection that has strength and tightness. The strength is necessary to prevent failure of the joint. The tightness is necessary in order to contribute to strength and to prevent leakage as in a boiler or in a ship hull The frame or body of ship.
When two plates are to be fastened together by a rivet as shows below, the holes in the plates are punched and reamed or drilled. Punching is the cheapest method and is used for relatively thin plates and in structural work. Since punching injures the material around the hole, therefore drilling is used in most pressure-vessel work. Material of Rivets The material of the rivets must be tough and ductile.
They are usually made of steel low carbon steel or nickel steel , brass, aluminum or copper, but when strength and a fluid tight joint is the main consideration, then the steel rivets are used. The rivets for general purposes shall be manufactured from steel conforming to the following Indian Standards: 1. IS: Reaffirmed Specification for hot rolled rivet bars up to 40 mm diameter for structural purposes; or 2. IS: Reaffirmed Specification for high tensile steel rivet bars for structural purposes.
The rivets for boiler work shall be manufactured from material conforming to IS: Reaffirmed Specification for steel rivets and stay bars for boilers. Manufacture of Rivets The rivets may be made either by cold heading or by hot forging. If rivets are made by the cold heading process, they heat treated so that the stresses set up in the cold heading process are eliminated.
If they are made by hot forging process, care shall be taken to see that the finished rivets cool gradually. Note: when the diameter of rivet is 12 mm or less generally cold riveting is adopted. Types of Rivets 1. Button Head 2. Counter sunk Head Types of Riveted Joints 1. According to purpose 2. According to position of plates connected 3. According to arrangement of rivets 1. According to purpose: a Strong Joints: b Tight joints: In these Joints strength is the only criterion.
Eg: Beams, Trusses and Machine Joints. These joints provide strength as well as are leak proof against low pressure. Eg: Reservoir, Containers and tanks. These are the joints applied in boilers and pressure vessels and ensure both strength and leak proofness. Oval counter Head 4. Pan Head 5. Conical Head. According to position of plates: A. Lap Joint: A lap joint is that in which one plate overlaps the other and the two plates are then riveted together.
Butt Joint: A butt joint is that in which the main plates are touching each other and a cover plate i. Strap is placed either on one side or on both sides of the main plates. The cover plate is then riveted together with the main plates. Butt joints are of the following two types: a. In a single strap butt joint, the edges of the main plates butt against each other and only one cover plate is placed on one side of the main plates and then riveted together.
In a double strap butt joint, the edges of the main plates butt against each other and two cover plates are placed on both sides of the main plates and then riveted together. According to arrangement of rivets: a. A single riveted joint is that in which there is a single row of rivets in a lap joint as shown in Fig.
A double riveted joint is that in which there are two rows of rivets in a lap joint as shown in Fig. Important terms of Riveted joints: 1. Pitch p : 2.
Back pitch Pb : 3. Diagonal pitch Pd : 4. Margin m : The Distance between two adjacent rivet holes in a row. The Distance between two adjacent rows of rivets. The smallest distance between centers of two rivet holes in adjacent rows of ZIG-Zag riveted joints. It is the distance between center of a rivet hole and nearest edge of the plate.
Modes of Failures of a Riveted Joint 1. Tearing of the plate at the section weakened by holes: Due to the tensile stresses in the main plates, the main plate or cover plates may tear off across a row of rivets as shown in Fig. In such cases, we consider only one pitch length of the plate, since every rivet is responsible for that much length of the plate only.
The resistance offered by the plate against tearing is known as tearing resistance or tearing strength or tearing value of the plate. Shearing of the rivets: The plates which are connected by the rivets exert tensile stress on the rivets, and if the rivets are unable to resist the stress, they are sheared off as shown in Fig.
It may be noted that the rivets are in single shear in a lap joint and in a single cover butt joint, as shown in Fig. But the rivets are in double shear in a double cover butt joint as shown in Fig. The resistance offered by a rivet to be sheared off is known as shearing resistance or shearing strength or shearing value of the rivet.
Shearing resistance or pull required to shear off the rivet per pitch length, Theoretically, in double shear When the shearing resistance Ps is greater than the applied load P per pitch length, then this type of failure will occur. Crushing of the plate or rivets: Sometimes, the rivets do not actually shear off under the tensile stress, but are crushed as shown in Fig. Due to this, the rivet hole becomes of an oval shape and hence the joint becomes loose. The failure of rivets in such a manner is also known as bearing failure.
The area which resists this action is the projected area of the hole or rivet on diametral plane. The resistance offered by a rivet to be crushed is known as crushing resistance or crushing strength or bearing value of the rivet. Download for free Report this document. Riveted Joints Fasteners Temporary Fasteners 1. Pipe Joints The Fastenings may be classified into the following two groups: 1.
Conical Head c Strong-Tight Joints: 2. In single shear Theoretically, in double shear Shearing resistance or pull required to shear off the rivet per pitch length, See Full Reader. Embed Size px x x x x Cotter and knuckle joint Education. Information Clamp Cylinder Cotter Joint, Knuckle Joint, Turnbuckle Detailed Syllabi of the Courses for B.
Cotter and Knuckle Joints Understanding
Lets see the drawing of Knuckle joint in Orthographic Representation. The Advantages of Cotter Joint are as follows. The socket and the spigot are provided with a narrow rectangular slot. But do you know about the Animation softwares in Engineering? The piston rod and the crosshead in a steam engine are usually connected by means of a Cotter joint b Knuckle joint c Ball joint d Universal joint [IES] 9.
A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. 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 pin joint, also called a revolute joint, is a one- degree-of-freedom kinematic pair. It constrains the motion of two bodies to pure rotation along a common axis. The joint doesn't allow translation, or sliding linear motion.
PDF | 1. Design of various types of riveted joints under different static Machine Design: Design of Riverted, Cotter, Knuckle Joints The rivets for boiler work shall be manufactured from material conforming to IS: –.
Machine Design Unit 4 Design of Riverted Cotter Knuckle Joints New
Cotter joint is used to connect two rods subjected to axial tensile or compressive loads. It is not suitable to connect rotating shafts which transmit torque. Axes of the rods to be joined should be collinear.
A Knuckle Joint is used for the application of the Tie rod joint of jib crane or Tension link in the structure of the bridge. In this article, I am going to present a detailed explanation of the design procedure for Knuckle Joint and Cotter Joint. When there is a requirement of an angular moment or a small amount of flexibility, the Knuckle joint is used. There is a single eye at one end of the rod and Double-eye on the end of another rod which is also called Fork End. Both, Single eye and Double-eye Fork End are connected employing a Knuckle pin inserted through the eye.
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Study & Analysis of Knuckle Joint with the Replacement of Material by Using Teflon
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Joint. 4. Design of Socket and. Spigot Cotter Joint. 5. Sleeve and Cotter Joint. Following are the three commonly used cotter joints to connect two rods by a cotter: In case the induced tensile stress is more than the allowable working stress.