. 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 . Figure 145.—Single Edges formed on Sheet Metal. sheet metal. In forming this edge in the folder, set thegauge to the required width, then insert the metal in themachine, holding it firmly against the gauge with the lefthand. Grasp the handle with the right hand and bringthe folding bar over until it rests on top of the handle of the machine is now brought to its formerposition and the m
. 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 . Figure 145.—Single Edges formed on Sheet Metal. sheet metal. In forming this edge in the folder, set thegauge to the required width, then insert the metal in themachine, holding it firmly against the gauge with the lefthand. Grasp the handle with the right hand and bringthe folding bar over until it rests on top of the handle of the machine is now brought to its formerposition and the metal removed from the machine, com-pleting the operation. 163 164 SHEET METAL WORKERS MANUAL Double Edge.—The double lock, shown in Figure 146,while used in certain work, is most commonly utilized tostrengthen sheet metal forms. When used for this pur-pose it is known as a double hemmed edge. This edge is. Figure 146.—Double Hemmed Edges. formed in the folder in the same manner as the singleedge. After the latter is formed, the sheet is turned over,
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
