| 摘要 |
<p>1,138,803. Shearing. STEEL CONSTRUCTION & ENG. CO. (NOTTS) Ltd. 19 Dec., 1967 [14 Jan., 1967], No. 2090/67. Heading B3W. An hydraulically-operable guillotine has vertical guides for its blade-carrying beam 8 and has its rams 19 inclined downwardly and forwardly at an angle corresponding closely to the plane of the resultants of the cutting forces and the shear forces acting on the movable blade during cutting. A cross-beam 5 transmits the reactions of the rams to side frames 2, and guidebars 47 are slidable in vertical grooves at the ends of the beam 8, the grooves being disposed forwardly of the beam 5 to enable the bars 47 to be removed without first removing the beam 8. The bars 47 are secured in grooves 46 in the side frames 2 and the grooves in the beam 8 are wider than the bars 47, the sliding fit of which is maintained by means of wedge blocks 48, Fig. 6, and screws 49, and the clearance provided enables the beam 8 to be tilted. Spring-loaded thrust-pins 50 extend from the bottoms of the grooves in the beam 8 into contact with the bars 47 to centralize the beam between the side frames. The beam 5 is of fabricated boxsection with the ends 9 sealed so that the beam serves as a reservoir for the hydraulic system. Pairs of gusset plates 17 carry pivots 18 for the upper anchorages of the rams 19. The beam 8 is fabricated from a bottom plate 39 and a front plate 40 both welded to a blade backing strip 41, a back strip 42 and a top strip 43, end pillars 45 with grooves for the bars 47, end gussets 53, intermediate gussets 54, 55 and pairs of smaller gussets 56 carrying pivots 57 for the lower anchorages of the rams 19. The side frames 2 consist of L-shaped plates which are connected to one another by means of a fabricated box. section reinforcing beam 7 the top of which affords a support table 30 for workpieces. The beam 7 is extended by support arms 34 dovetailing into the front of the beam. A clamping bar 58 for the workpieces is operable by a pair of rams 59 supported by brackets carried by the side frames. A plate 38 directs scrap material to the rear of the machine for ready removal. An adjustable back stop comprises a stop-rod 63 supported by a block 64 slidable along a rod 65.</p> |
