Home instruction for sheet metal workers . Reverse the sheet in the position A, Fig. 258, and make a bendon dot 7 to the required angle, bringing A in the position B and place it in the brake A, Fig. 259, where it mustbe forced into the brake so that the upper leaf can be closed ondot 6, in doing so a strikes against the lower leaf and makesa slight curve in the rabbet of the bar at b. Make bend on dot 6at right angles, bringing A in the position shown by the dottedoutline C V. The angle b is now pressed together with thethumb and finger, bringing C into its proper position, as shown
Home instruction for sheet metal workers . Reverse the sheet in the position A, Fig. 258, and make a bendon dot 7 to the required angle, bringing A in the position B and place it in the brake A, Fig. 259, where it mustbe forced into the brake so that the upper leaf can be closed ondot 6, in doing so a strikes against the lower leaf and makesa slight curve in the rabbet of the bar at b. Make bend on dot 6at right angles, bringing A in the position shown by the dottedoutline C V. The angle b is now pressed together with thethumb and finger, bringing C into its proper position, as shownby the solid outline B. The sheet is now reversed on dot 5, Fig. 260, A, and A bentaround as far as it will go, as indicated by B. Leaving the sheetin the brake, draw out to dot 2, Fig. 261, A, and make a bendon dot 2, as far as possible, as indicated by B. Open full thejaws of the brake, insert the bend just made and close to a hemedge, Fig. 262. Reverse the sheet in the position A, Fig. 263, 198 Home Instruction for Sheet Metal Workers. Figs. 254-265. Bending Operation on Brake in Making Finished Curbfor Top and Sides of Skylight. Construction of Flat Skylight 199 and make a square bend on dot 4, as shown by B. Again reversethe sheet, A, Fig. 264, and make another square bend on dot 3,bringing the sheet into the position B. Open the jaws of the brake as far as possible and place angle5 into them, as shown by A, 5, 2, Fig. 265. Close the upper leafslowly until bend 9, shown on the dotted lines, almost reaches thebend 4 in B, when it can be seen whether the joint 9 4 will springtogether tight. If there is any doubt that 9 and 4 in B will notmeet, simply press together the angle at a and close the upperleaf C with a quick motion on bend 5, which will cause bends 9and 4 to spring together. It will probably be necessary for the student to try these bend-ing operations a number of times before he becomes proficient,and it is well to cut short pieces of curbs, about 3 or 4 in. long,
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
