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Riveted Joints
                      Hareesha N G
                Dept. of Aeronautical Engg
           Dayananda Sagar College of Engineering
                       Bangalore-78


04/04/13              Hareesha N Gowda, DSCE, Blore-78   1
Introduction
•   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.
•    The rivets are used to make permanent fastening between the
    plates such as in structural work, ship building, bridges, tanks
    and boiler shells.
•   The riveted joints are widely used for joining light metals.




    04/04/13               Hareesha N Gowda, DSCE, Blore-78        2
Types of Rivet Heads




04/04/13      Hareesha N Gowda, DSCE, Blore-78   3
Types of riveted joints
1. Lap joint
2. Butt joint
• 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 kept
  in alignment butting (i.e. touching) each other and a cover plate
  (i.e. 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 joint
   04/04/13                  Hareesha N Gowda, DSCE, Blore-78           4
              Lap joint
Important Terms Used in Riveted Joints
• The following terms in connection with the riveted joints are
   important from the subject point of view :
1. Pitch. It is the distance from the centre of one rivet to the centre of
   the next rivet measured parallel to the seam as shown in Fig. It is
   usually denoted by p.
2. Transverse pitch. It is the perpendicular distance between the centre
   lines of the successive rows as shown in Fig. It is usually denoted by
   pt.
3. Diagonal pitch. It is the distance between the centres of the rivets in
   adjacent rows of zig-zag riveted joint as shown in Fig. It is usually
   denoted by pd.
4. Margin or marginal pitch. It is the distance between the centre of
   rivet hole to the nearest edge of the plate as shown in Fig. It is usually
   denoted by m.
   04/04/13                  Hareesha N Gowda, DSCE, Blore-78           5
Proportions of dimensions of riveted joints
•   Thickness of plate
       t = Thickness of the plate
•    Diameter of rivets.
the diameter of the rivet hole (d) may be determined by using

•       Distance of centre of the rivet from edge of the plate =
        1.5d
•       Margin , m=d
•       Longitudinal Pitch p=3d
•       Transverse pitch pt = 0.8P for chain riveting
                           = 0.6P for zig-zag riveting
•       Thickness of butt strap.
             Single cover plate t1 = 1.125 t
             Double cover plate t2 = 0.7 to 0.8t
    04/04/13                  Hareesha N Gowda, DSCE, Blore-78     6
• Types of Riveted joints




  04/04/13          Hareesha N Gowda, DSCE, Blore-78   7
• Double Riveted lap joints




  04/04/13          Hareesha N Gowda, DSCE, Blore-78   8
• Double Riveted Zig zag Lap joint




  04/04/13          Hareesha N Gowda, DSCE, Blore-78   9
• Single riveted, single strap butt joint




  04/04/13            Hareesha N Gowda, DSCE, Blore-78   10
• Single riveted, double strap butt joint




  04/04/13           Hareesha N Gowda, DSCE, Blore-78   11
• Double riveted, double strap chain butt joint




  04/04/13          Hareesha N Gowda, DSCE, Blore-78   12
• Double riveted, double strap zig zag butt joint




  04/04/13           Hareesha N Gowda, DSCE, Blore-78   13
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Riveted joints

  • 1. Riveted Joints Hareesha N G Dept. of Aeronautical Engg Dayananda Sagar College of Engineering Bangalore-78 04/04/13 Hareesha N Gowda, DSCE, Blore-78 1
  • 2. Introduction • 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. • The rivets are used to make permanent fastening between the plates such as in structural work, ship building, bridges, tanks and boiler shells. • The riveted joints are widely used for joining light metals. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 2
  • 3. Types of Rivet Heads 04/04/13 Hareesha N Gowda, DSCE, Blore-78 3
  • 4. Types of riveted joints 1. Lap joint 2. Butt joint • 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 kept in alignment butting (i.e. touching) each other and a cover plate (i.e. 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 joint 04/04/13 Hareesha N Gowda, DSCE, Blore-78 4 Lap joint
  • 5. Important Terms Used in Riveted Joints • The following terms in connection with the riveted joints are important from the subject point of view : 1. Pitch. It is the distance from the centre of one rivet to the centre of the next rivet measured parallel to the seam as shown in Fig. It is usually denoted by p. 2. Transverse pitch. It is the perpendicular distance between the centre lines of the successive rows as shown in Fig. It is usually denoted by pt. 3. Diagonal pitch. It is the distance between the centres of the rivets in adjacent rows of zig-zag riveted joint as shown in Fig. It is usually denoted by pd. 4. Margin or marginal pitch. It is the distance between the centre of rivet hole to the nearest edge of the plate as shown in Fig. It is usually denoted by m. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 5
  • 6. Proportions of dimensions of riveted joints • Thickness of plate t = Thickness of the plate • Diameter of rivets. the diameter of the rivet hole (d) may be determined by using • Distance of centre of the rivet from edge of the plate = 1.5d • Margin , m=d • Longitudinal Pitch p=3d • Transverse pitch pt = 0.8P for chain riveting = 0.6P for zig-zag riveting • Thickness of butt strap. Single cover plate t1 = 1.125 t Double cover plate t2 = 0.7 to 0.8t 04/04/13 Hareesha N Gowda, DSCE, Blore-78 6
  • 7. • Types of Riveted joints 04/04/13 Hareesha N Gowda, DSCE, Blore-78 7
  • 8. • Double Riveted lap joints 04/04/13 Hareesha N Gowda, DSCE, Blore-78 8
  • 9. • Double Riveted Zig zag Lap joint 04/04/13 Hareesha N Gowda, DSCE, Blore-78 9
  • 10. • Single riveted, single strap butt joint 04/04/13 Hareesha N Gowda, DSCE, Blore-78 10
  • 11. • Single riveted, double strap butt joint 04/04/13 Hareesha N Gowda, DSCE, Blore-78 11
  • 12. • Double riveted, double strap chain butt joint 04/04/13 Hareesha N Gowda, DSCE, Blore-78 12
  • 13. • Double riveted, double strap zig zag butt joint 04/04/13 Hareesha N Gowda, DSCE, Blore-78 13
  • 14. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 14
  • 15. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 15
  • 16. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 16
  • 17. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 17
  • 18. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 18
  • 19. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 19
  • 20. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 20
  • 21. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 21
  • 22. 04/04/13 Hareesha N Gowda, DSCE, Blore-78 22