Design and analysis of riveted joints
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This document discusses riveted joints. It defines a rivet as a short metal pin used to hold together two metal plates by expanding the headless end. A riveted joint uses multiple rows of rivets inserted into the overlapping portion of two plates to strengthen the connection. There are different types of rivet heads. The design process for riveted joints involves calculating plate thickness, rivet diameter, rivet pitch, forces on the joint, and joint efficiency.
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This document discusses rivets, rivet joints, and riveting methods. It describes rivets as short cylindrical rods with a head and tapered tail used to fasten metal parts. There are two main types of rivet joints: lap joints, where one plate overlaps the other; and butt joints, where plates are aligned with a cover plate. Rivets are typically made of steel, aluminum, or other metals. Riveting can be done cold or hot, by hand or machine. The riveting process involves placing rivets through drilled or punched holes and forming the rivet ends to secure the plates tightly together. Rivet joints are commonly used in shipbuilding, aircraft construction,
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- It provides details on the essential qualities, failures, strength, and efficiency of riveted joints. Specific guidelines are given for the design of boiler joints, including assumptions made and determining the thickness, diameter of rivets, pitch, number of rows, and overlap for longitudinal butt joints and circumferential lap joints.
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The document discusses various mechanical fastening methods used to assemble parts. It describes threaded fasteners like screws, bolts, and nuts which allow for disassembly. It also covers permanent fastening methods like rivets and eyelets. Interference fits that create an interference during or after assembly to hold parts together are also discussed, including press, shrink, and expansion fits. The document provides details on the use, advantages, and considerations for each fastening method.
Fasteners.pdf
Threaded fasteners such as bolts and screws join components together through the transformation of rotational motion into linear motion. There are various thread standards that specify attributes like diameter, pitch, class of fit, and thread type. Early threaded fasteners lacked standardization but efforts in the 18th-19th centuries established conventions for sizes. Modern standards include metric and unified external and internal thread systems.
Hand tools and instruments
This document discusses various hand tools used in electrical work, including screwdrivers, nutdrivers, pliers, wire strippers, cutters, hammers, wrenches, punches, saws, drills, clamps, soldering equipment, and measuring instruments. It provides details on the purpose and proper use of each tool. Care and maintenance of tools is emphasized, such as cleaning tools after use, sharpening blades, not using tools improperly, and replacing damaged tools.
Sheet metal operations1class
Sheet metal working involves forming metal into thin, flat pieces that can be cut and bent into various shapes. Common materials for sheet metal include steel, aluminum, brass, and copper. Sheet metal has many applications and can be formed through processes like cutting, bending, drawing, and joining. Thickness of sheet metal is measured by gauge, with higher gauges being thinner.
4.main content final copy edited (2)
1. The document discusses various engineering drawing codes, symbols, and standards including abbreviations, IS codes, and presentation rules.
2. Welding symbols and their components like arrow lines, reference lines, weld size, finish symbols, and unwelded lengths are defined. Riveted joint types and rivet head forms are also covered.
3. Screw thread terms such as crest, root, pitch, and types including V-thread, square thread, and metric threads are explained. Keys, fasteners, and threaded components like bolts, nuts, and taps are also discussed.
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- 2. Introduction 1. Q1. What is a Rivet? -> A short metal pin or bolt for holding together two plates of metal, its headless end being beaten out or pressed down when in place. 2. Q2. What is a Riveted Joint? -> Rivets are inserted on the overlapping portion. Single or multiple rows of rivets are used to give strength to the joint. Depending upon the number of rows the riveted joints may be classified as single riveted lap joint, double or triple riveted lap joint etc. 3. Q3. What does a Rivet significes? ->A rivet is a permanent mechanical fastener.
- 3. Objective Design of a Riveted Joint. • Rivets: • Riveted Joints:
- 4. Types Of Rivets 1. Buton Head 2. Counter Sunk Head 3. Oval Counter Head 4. Pan Head 5. Conical Head 6. Tubular Rivets
- 5. Design Of Riveted Joints 1. Firstly we've to measure the forces acting on the joint. 2. Then we've to calculate the thickness of the Plate [ t = P*D/2*σt*ηl ]. 3. Then if t>8mm we've to use Unwin's formula i.e. d' = 6.05√t ; d' = Nominal dia and d can be found out from a table 10.5. If t<8mm then dia can be find out by equating Shearing Strength and Crushing Strength. 4. Pitch of Rivet: Pmin = (2.25 to 2.5)*d Pmax= Ct+41 ; Value of C will be in Table 10.7 5. Determine 4 Forces i.e. Ft,Fs,Fc,Fst. 6. Efficiency = (Least among Ft,Ft,Fc and Fst)/P*t*σt
- 6. Thank You... Submitted by... 1.Amartya Roy 2.Amrit Pratik 3.Aman Mishra 4.Adnan Ashrafi 5.Anuraag Dubey 6.Anuraag Poddar