Cogging

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Note the uniform colour of the ingot  - ex the soaking pits.

 

An ingot in the first stages of rolling in the cogging mill.

This was a 2-high 41.5 inch reversing mill reconditioned by Davy United and installed in 1950. The large dial is the screwdown indicator reading from 0-24 " in 1/4" increments and shows the gap between top and bottom rolls. A second operator mans the controls to the manipulators. Side guard manipulators were on both sides of the mill and tilting fingers on the ingoing side.

Cogging reduced the ingot section to a bloom which was of a pre-determined size for the roughing mill. The ends were cropped by an electrically operated shear and the crop ends were returned to the Bessemer and electric arc furnaces as scrap.

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