Page:Sheet Metal Drafting.djvu/38

Illustrative Examples

1000 bread pans 4"×8"×2" deep with ½" flare on all sides are to be made. The size of the body pattern is 7½" by 8½". The size of the end pattern is: top 4½", bottom 3½", depth 2½".

Example of Problem 4A.

Fig. 37.

Ans. (a) 36 blanks for body.
⁠(b) 38 blanks for ends.

Example of Problem 4C.

1 piece 1½"×25½" =	38.25	sq. in.
1 piece 4½"×1"=	04.50	sq. in.
Total	42.75	sq. in.	Ans. 42.75 sq. in., waste from bodies.

Example of Problem 4D.

length	08.5"
×			Total waste 42.75÷36=1.18 sq.
width	07.875"		in., waste per blank.
	66.93	sq. in., area of body

(Area) 66.93	1.11800	(waste)	.017
	0.6693
	0.51070
	0.46851
		Ans.	1.7%	, waste per body blank.