. Railway mechanical engineer . Fig. 2—Punch Equipped with Tools for Multiple Punching ofPlates are mounted on the punch blocks in the same way that thedie holders are held in place, that is, by means of T-headbolts. Z-bars are also handled in pairs with a special set-up, for either web or flange punching. For this work, highand low die holders, and long and short punch spindles arerequired. As the clearance between housings is approxi-mately 39 inches, plates or sills up to 36 inches in widthcan be punched. The design of this tool is such that it can be fitted upvery readily with coping tools
. Railway mechanical engineer . Fig. 2—Punch Equipped with Tools for Multiple Punching ofPlates are mounted on the punch blocks in the same way that thedie holders are held in place, that is, by means of T-headbolts. Z-bars are also handled in pairs with a special set-up, for either web or flange punching. For this work, highand low die holders, and long and short punch spindles arerequired. As the clearance between housings is approxi-mately 39 inches, plates or sills up to 36 inches in widthcan be punched. The design of this tool is such that it can be fitted upvery readily with coping tools, or it can be converted into 386 RAILWAY MECHANICAL ENGINEER Vol. 93. No. 6 a gate shear, guillotine type shear, angle and channel shear,or bar shear. The adaptability of this multiple punch for use in con-nection with a spacing table is shown in Fig. 4, in which. Fig. 3—Set-Up of Tools for Blanking Out Web of Channel amiPunching at Each Side in Pairs the spacing carriage (of the hand-operated type) is shownin the foreground in place on the roll table. The trailercarriage, for guiding the trailing end of the plate orother member while goingthrough the punch is shownsomewhat indistinctly on end of the roll table. Themovement of the spacing car-riage in advancing the platethrough the punch can bemade entirely automatic bythe use of a motor mountedon the carriage and drivingthrough a clutch arrangementand gear train to the pinionsthat are to be seen in the il-lustration adjacent to the car-riage wheels. However, asthe rollers of the roll tableare all equipped with ballbearings, the heaviest platecan be moved by hand withremarkable ease. Whether motor or handdriven, the spacing betweenholes or rows of holes, asthe case may be, lengthwiseof the plate, is automaticallycontrolled by means of a full-sized templet which is fast-ened to the si
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
