13 Pressworking of Sheet Metal Flashcards
When metal is loaded in a manner to cause fracture is known as
Shearing
When metal is loaded past it’s elastic limit to cause plastic flow usually by the application of tension or bending loads
Bending or drawing
The tool member with the recess whole, or depression is called the
Die
The member that enters the hole or depression of the die
Punch
Methods that can provide a high accurate means for thickness measurement of sheet metal
Ultrasonic UT and Eddy current ET
Methods suitable for detecting tears and cracks that can result from irregularities in the materials or process used in sheet metal
UT, PT, and ET
Shearing, slitting, cut off, parting, dinking, and blanking are all
Stock preparation and blank producing operations
Punching, slotting, perforating, seminotching, notching, lansing, and piercing are all
Hole making operations
Trimming and shaving are
Finishing operations
Straight-line cutting performed on a squaring shear that has permanently mounted, or opposed straight blades
Shearing
Intended to cause localize plastic flow about one or more of linear axes in the material without causing fracture
Bending
Operation that may include simple bending, multiple bends, and drawing is known as
Forming
Involves bending, stretching, and compression of metal over a wide areas
Drawing
Method used to form sheet metal, held under tension with sufficient force to exceed the yield point and pulled down over, or wrapped around, the single form block
Stretch forming
Method used for manufacturing cylindrical drawn shapes
Spinning
