. Forging of iron and steel, a text book for the use of students in colleges, secondary schools and the shop . Fig. 110 are the same as described above; but the process is more difficult. Bending Plates. â In bending large work to various outlines many devices areused, such as cast irontemplates, or bendingblocks. Their design andcontruction are a matterof cost. When only a fewsimple pieces are to bebent the cost of even asimple block would beprohibitive, but whenmany pieces are wanted all alike, elaborate blocks may be made. Fig. Ill shows a block for bending flat bars. It can be made for any
. Forging of iron and steel, a text book for the use of students in colleges, secondary schools and the shop . Fig. 110 are the same as described above; but the process is more difficult. Bending Plates. â In bending large work to various outlines many devices areused, such as cast irontemplates, or bendingblocks. Their design andcontruction are a matterof cost. When only a fewsimple pieces are to bebent the cost of even asimple block would beprohibitive, but whenmany pieces are wanted all alike, elaborate blocks may be made. Fig. Ill shows a block for bending flat bars. It can be made for any radius or even for differently shaped curves, and the working edge (a) can be made with a T or L section; so that shapes also can be bent. The block consists of a heavy cast-iron plate of the desired shape with a means suitable for fastening it to a bench or leveling block. The end of the piece to be bent is held in the groove (a) by the clips (b), which are fastened to the plate by bolts or pins in some of the holes. Fig. Ill and by the pin (c), slippedthrough the slots in (6). As the piece is bent moreclips are added, which process holds it to the blockuntil the required amount of the piece is bent to therequired shape. Fig. 112 shows a bending block forgeneral work, fitted with a screw. Upon this blockbars can be straightened or bent at most any block is pierced with numerous circular and slotted BENDING AND TWISTING 75 holes, which receive pins to form the necessary supportsfor the piece in bending. At (a) is a block securelyfastened to the plate, in which is a thread to movethe screw (6) in or out to put pres-sure on the work. In operation theplate is very simple. Pins are placedin the holes, the piece is forced be-tween them, and is bent to the desiredshape. The screw is useful in straight-ening stock and is used as follows: âPins are placed in holes (c), the ⢠r.âI D râi i :::,) L__) oO u.° a 0 6 oo° 1â1 â m 0 CT3 iâ> C=3 o c rv n era 0°
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
