Sheetmetal Flashcards
What is done with the stem of a friction lock rivet?
Trimmed flush with head
Example of self plugging rivet?
Cherry lock, Cherry Max or Huck
Tool to install Cherry lock?
Hand or air puller
Proper rivet shop head?
1 1/2 dw x 1/2 d tall
What is bonded honey comb construction?
Laminator (two metal sides bonded to honeycomb)
Materials used in bonded honey comb?
Stainless, titanium, magnesium, plywood, glass nylon and cotton cloth
What are some causes of delamination in honeycomb?
Sonic vibe, liquid, internal condensation,manu. Flaw
What is potting compound used for?
Hole filling in honeycomb
What is done with the damaged area of honeycomb?
Must be removed
What causes crazing?
Stress, improper handling, and harmful solvents
How do you drill Plex?
Back up with wood feed drill slowly
What should be done to a twist drills used to drill Plex?
60° tip angle, zero rake on cutting edge, back lip angle increased to 12° to 15°
Calculations made when bending sheet metal? 
Bend allowance and setback
What must be done where to bends intersect?
Relief holes drilled
What type of weathering damage may be found on aluminum aircraft?
Corrosion
Methods of forming sheet metal?
Shrinking, stretching, bumping, crimping and folding
Factors of setback?
Radius and thickness
Purpose of lightning holes?
Reduce weight
What is a joggle?
Offset formed to allow clearance
Total length of a rivet installation?
Grip link and one and a half times shrank diameter
Proper material and repair?
Same as original
Single row spacing and ED of protruding heads?
2D (2x Rivet diameter) Edge distance and 3D rivet spacing
Describe rivet head markings?
1100, 5056, 2024, 2117, 2017
Dimpling versus countersink?
Material thickness
Most common rivet failure?
Shear
Replace a 2024 with 2117?
For 5/32 Or use next larger size of 2117
