7.8 Flashcards
What can make a rivet harder to form ?
Having a long grip length.
Why shouldn’t rivets be used in areas subject to tension ?
They have low tensile strength to shear
What’s the 3 riveted joints ?
Lap joints
Flush joints
Joggle joints
Why Is a lap joint not really used ?
Not aerodynamically smooth
Why is a joggle joint used ?
To allow the two pieces of metal to be on the same plane rather than pulling it against skin
What chapter in the SRM is it to identify the rivet spacing and edge margin
51
What’s the pitch of a rivet ?
Space between centre of one rivet to centre of the next rivets hole in a row.
How far should an edge margin normally be from the edge of the metal to centre of rivet ?
2D - 2.5D times rivets shank diameter.
What’s the spacing of rivets ?
Distance between rivet rows and are normally 4 - 5D
What’s an sphere influence ?
Area of metal over which rivet achieves watertight joint ( normally 5D )
When do you use a rivet cutter ?
To cut end of shank when a rivets required length is unavailable.
How many blows per minute does a slow hitting rivet gun strike ?
900 - 2500
How long does it take for a rivet gun to upset a rivet ?
1 - 3 seconds
What’s the two most common skin pins used ?
Cleco fasteners
Gripper pins
When is a cleco wing nut fastener used over cleco pin >
When there is a higher clamp pressure required
( has clamping force of 0 - 135 kg )
What way do you twist rivet shaver to make it cut deeper ?
Clockwise
What’s the most common used countersink angle on a countersink tool ?
100 degrees
How much smaller should the pilot on a micro stop countersink tool be to the hole ?
0.002 inch
What’s the three methods of dimpling ?
Coin dimpling
Radius dimpling
Hot dimpling
