Day 4 Progress Check Flashcards
Which is a recommended method for marking layout lines on sheet metal?
Grease pencils
If the bend radius is 5/32 inches, the material thickness is 0.040 inches, and the bend angle is 45°, what is the bend allowance?
0.136 inches
Which factor affects the minimum bend radius?
Temper of the metal
The neutral axis of a bent sheet metal part is defined as:
The area that does not stretch or shrink during bending
Which of the following statements about the grain direction of sheet metal is true?
The bend lines should lie at a 90° angle to the grain if possible
What is the purpose of the sight line when bending sheet metal?
To ensure the bend occurs between the bend tangent lines
In a U-channel with a 45° bend and a 135° bend, if the bend radius is 5/32 inches and the material thickness is 0.050 inches, what is the total developed width (TDW)?
10.396 inches
For a bend angle other than 90°, how is the setback calculated?
Setback = K(Bend Radius + Material Thickness)
If the bend radius is 5/32 inches and the material thickness is 0.040 inches, what is the setback for a 90° bend?
0.134 inches
What is the bend allowance?
The distance between the two tangent lines on a flat layout
What is the purpose of the K-value in calculating the setback for bends other than 90°?
It is a constant that accounts for the bend angle
If the bend radius is 5/32 inches, the material thickness is 0.040 inches, and the bend angle is 45°, what is the setback?
0.081 inches
If the bend radius is 3/32 inches, the material thickness is 0.040 inches, the F1 length is 1 inch, the F2 length is 2 inches, and the F3 length is 1 inch, what is the total developed width (TDW) for a 90° U-channel bend?
3.816 inches
How is the bend allowance calculated for a bend angle other than 90°?
BA is obtained from a bend allowance chart
In a U-channel flat layout, how many setbacks are present on the F2 flat?
2
