. 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 . ylene in a welding flame willcarbonize the metal. This should be avoided, except inspecial cases where it is desired to carbonize mild steel. PREPARATION FOR WELDING The operator should remember that any job to bewelded must be properly prepared, cleaned, lined up,etc., before the blowpipe is lighted. Butt Welding.—Metals of % inch in thickness or lessare usually butt welded without beveling (see F
. 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 . ylene in a welding flame willcarbonize the metal. This should be avoided, except inspecial cases where it is desired to carbonize mild steel. PREPARATION FOR WELDING The operator should remember that any job to bewelded must be properly prepared, cleaned, lined up,etc., before the blowpipe is lighted. Butt Welding.—Metals of % inch in thickness or lessare usually butt welded without beveling (see Figure250). In welding metal parts more than % inch in thick-ness, the entire thickness of each side should be beveledat an angle of about 45° (Figure 251). Beveling insures OXY-ACETYLENE WELDING AND CUTTING 321 penetration of the weld entirely through the metal. Thisis especially necessary in heavy sections. When the metalis more than % inch thick, and it is possible to weld Figure 250.—Example of Butt Joint Before Welding on Thin SheetMetal up to % Inch in Thickness, Where Beveling Is Unnecessary. Figure 251.—Bevel Employed on Metal Less than % or % Inch andOver ys Inch in Figure 252.—Example of Beveling and Welding Sections Over % Inclfc in Thickness. Parts Are Beveled and Welded on Both Sides, as Shown.
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
