MATERIAL HANDLING Flashcards
______metal is achieved by hammering or rolling metal under pressure.
Stretching
This process is used when the length of a piece of metal, especially on the inside of a bend, is to be reduced.
SHRINKING
______ is folding, pleating, or corrugating a piece of sheet metal in a way that shortens it by turning down a flange on a seam.
Crimping
_______ involves shaping or forming malleable metal by hammering or tapping—usually with a rubber, plastic, or rawhide mallet.
Bumping
A proper set up of the sheet metal brake is necessary because accurate bending of sheet metal depends on _________ to be formed and the required radius of the part
the thickness and temper of the material
The _______ are ordinarily used to make straight bends.
cornice brake and bar folder
The concave flange is formed by ______
stretching
the convex flange is formed by _____
shrinking
______ is one of the most difficult methods of hand forming sheet metal because there is no exact forming block to guide the operation. The depression or pit has a tendency to shift from the hammering, which necessitates periodic readjustment during the bumping process. The degree of shifting depends largely on the contour or shape of the piece being formed, and whether glancing blows must be struck to stretch, draw, or shrink the metal
Sandbag bumping
A _____, often found at the intersection of stringers and formers, is the offset formed on a part to allow clearance for a sheet or another mating part. Use of the _______ maintains the smooth surface of a joint or splice.
joggle
The amount of offset is usually small; therefore, the depth of the joggle is generally specified in _______.
thousandths of an inch
The distance between the two bends of a joggle is called the __________.
allowance
______, also referred to as the ring test or coin test, is widely used as a quick evaluation of any accessible surface to detect the presence of delamination or debonding.
Tap testing
Manufacturers of other aircraft, such as highspeed high-performance jets, are required to utilize various methods of incorporating _______ into their structures to make them conductive.
aluminum
