. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Correct Method of Holding the Blowpipe with Relationto the Line of Figure 261.—Incorrect Method of Applying Filling Is Also Held at the Wrong Angle withRelation to the Line of Weld. The joined. (See Figure 262.) When the metal operated onexceeds %-inch in thickness, the end of the filling rod maybe plunged into this molten bath, which will graduallyabsorb it and thus increa
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Correct Method of Holding the Blowpipe with Relationto the Line of Figure 261.—Incorrect Method of Applying Filling Is Also Held at the Wrong Angle withRelation to the Line of Weld. The joined. (See Figure 262.) When the metal operated onexceeds %-inch in thickness, the end of the filling rod maybe plunged into this molten bath, which will graduallyabsorb it and thus increase its own volume. Never melt the filling rod when it is not touching orplunged into the molten metal. You will never produce a 328 SHEET METAL WORKERS MANUAL satisfactory weld by allowing melted drops from thefilling rod to fall on the heated parts. This bad practiceis illustrated by Figure 261. Some operators prefer a zigzag motion as shown in Bof Figure 259, instead of the figure 8 motion. While spreading the heat is beneficial, yet at the sametime the weld should be made as quickly as possible, keep-
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