Abstract
After briefly sketching the history of performance trials conducted by the authors' organization, the importance of making forging presses fast acting at minimum capital cost is established. Extracts from trial results taken on presses with direct, steam-intensifier, and accumulator drive are included and discussed. Inherent features particular to each of these drives are distinguished from those common to all, or applying to particular presses only. Of the three kinds of drive considered, the steam-intensifier drive is deemed obsolescent. The advantages and disadvantages of the other two types of drive are reviewed, with special reference to performance. It is concluded that the full benefits of fast-acting presses can only be realized by parallel improvement in manipulation and the development of position control.
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