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160 Forging- Stamping - Heat Treating
Manufacturing Arrangement.
The Bow of material starts at the receiving platform
adjacent to the railway siding, Fig. 5, where
the bar stuck and other materials are brought into
storage racks through the north entrance. For example,
raw material for forgings is sheared to length,
is then passed to Bradley hammers to receive initial
breaking down and thence to the drop hammers where
a suitable number of passes brings the work to finished
forging dimensions. The material after passing
through various pickling, heat treating and straightening
operations, is moved to the second floor for machining
operations and final inspection. It is then
transferred to the erecting floor or placed in finished
stores.
After the rough stock is broken down on the
Bradley hammer. Fig. 4, it is reheated, drop forged
and trimmed. Before the next forging operation the
blade must be pickled to remove the scale. If pickling
fails to remove all traces of scale it must be chipped
May, 1925
or ground off, otherwise the following forging operations
will further inbed the scale. On certain types
of blades it is necessary to put them through as many
as six d;op forging operations, each followed by trimming
and pickling.
At the present time material is transported from
one department to another by means of hand trucks.
This is not particularly objectionable as the quantity
of material is small. However, special racks or baskets
are being installed in the forge shop to facilitate
the handling of material. With the new system, the
partly forged blades after being trimmed will be
placed in monel metal baskets, conveyed to the pickling
department and placed in the pickling tanks without
removing the blades from the baskets. After completing
the p.ckling operations, the basket containing
the blades will be returned to the forge shop for the
next forging operation. This method will eliminate
two handlings of the blades for each pickling and on
blades requiring several forging operations will represent
a considerable saving.
FIG 6 (Upper left)-Machine operations. (Upper right)-Small rolling mill and reel. (Center)—Draw bench reel type (Lower
left)—.Large draw bench. (Lower right)—Straightening rolls for drawn stock. ' ype' ^ower