. American engineer and railroad journal . Mr. (i. S. Glllon, of New York, pre-sented a paper on Hydrostatic Tools in Railway Service, inthe addenda of which Is presented a heavy t>h;iftiu« pre» de-signed by the Watson-StillmaE Company, New forifor an Eastern shop. Through the courtesy of Mr. Stillmanwe reproduce an engraving of this press, together with threeother important hydraulic- lools. This same shafting press Mr. Stillman says is suitable forforging the standard M. C. B. axles. It was originally de-signed for low pressure and a long stroke, and is operated bya low-pressure pump with
. American engineer and railroad journal . Mr. (i. S. Glllon, of New York, pre-sented a paper on Hydrostatic Tools in Railway Service, inthe addenda of which Is presented a heavy t>h;iftiu« pre» de-signed by the Watson-StillmaE Company, New forifor an Eastern shop. Through the courtesy of Mr. Stillmanwe reproduce an engraving of this press, together with threeother important hydraulic- lools. This same shafting press Mr. Stillman says is suitable forforging the standard M. C. B. axles. It was originally de-signed for low pressure and a long stroke, and is operated bya low-pressure pump with an air accumulator and lugh-press-ure intensifier. The high pressure being used only on tinworking stroke; that is, the low-pressure pump moves theplunger to its upward position and the high pressure aclonly on the downward working stroke. The drawback cylin-der marked C is single-acting, the water being forced intothe cylinder through the pipe a, from the low-pressure pump,through an accumulator at a pressure of l!Ji) lbs. per sq. Triple Acting Forgin? Independent Speed Cylinders. The high-pressure drives the plunger P through a stroke of 16ins. as often as 12 times a minute and exerts a pressure of4,000 lbs. per sq. in. on the work. A more satisfactory set ofvalves and cylinders for operating such a press, in which theblows of the plunger can be made as frequent as the metalcan be worked, is shown in the accompanying engraving, inconnection with the triple-acting forging press. The move-ments of the plunger are all done by low pressure, the highpressure being thrown in, as the die is brought to the work,thus making a very economical machine. This tool is itself a most valuable one for forging and isadapted to forming a large number of small articles from sheetand bar iron. There are three drawback cylinders for with-drawing the large rams, and two small cylinders placed be-tween the rods. Besides the large reversing cylinder, speedcylinders are provided, th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
