Home instruction for sheet metal workers . <-ECUALS X DIAM. -^ Fig. 93. Fie. 94 Fig. 92. Forming the Cove. Figs. 93-4. Pattern for Tube and Appearance AfterBeading for Flanging. It will be noticed that the decimal point is before four figureson the first line and before one figure on the second, or a totalof five; for that reason place the decimal point before five figuresin the answer, which will read 7 and 85 hundredths, or nearly7J/S in. (), the length from B to C, Fig 93. A lap is allowed for grooving or soldering, after which thetube is rolled up and soldered, as explained
Home instruction for sheet metal workers . <-ECUALS X DIAM. -^ Fig. 93. Fie. 94 Fig. 92. Forming the Cove. Figs. 93-4. Pattern for Tube and Appearance AfterBeading for Flanging. It will be noticed that the decimal point is before four figureson the first line and before one figure on the second, or a totalof five; for that reason place the decimal point before five figuresin the answer, which will read 7 and 85 hundredths, or nearly7J/S in. (), the length from B to C, Fig 93. A lap is allowed for grooving or soldering, after which thetube is rolled up and soldered, as explained in connection with Fig. 95. Flanging the Tube. 17 on stripping. The tube is then ready to be flanged outy2 in. The gage is set on the small turning machine, and thetube passed through the machine a few times, when it will havethe appearance enlarged at A, Fig. 94. This small groove actsas a guide when flanging, Fig. 95. Notice how this is done. Thesquare head stake A is placed in the) bench, the groove of thetube B placed on the corner of the stake, and holding the tubeat an angle, the stretching hammer C is used to gradually stretchthe metal in turning over the flange in the position shown by thedotted line a. It requires a little practice in using this blows are given along the outer edge of the flange, so 70 Home Instruction for Sheet Metal Workers as to expand the metal, which allows the flange to turn, until ithas the position shown by D, after which the flange is dressedflat with mallet E. As a rule when the beginnerflanges any tube for thefirst time he is not apt tokeep it in a true
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
