Improvements in or relating to hydraulically-operated press brakes or guillotines

摘要

1,005,114. Guillotines; press brakes. STEEL CONSTRUCTION & ENGINEERING CO. (NOTTS) Ltd. Aug. 4, 1964 [Aug. 9, 1963], No. 31459/63. Headings B3E and B3W. A guillotine or press-brake of the type in which the movable tool holder is actuated directly by a pair of hydraulic rams, one at each end of the beam supporting the movable tool, is characterized in that the side frames each comprise an upright plate, a pair of plates flanking and secured to at least an upper portion of the upright plate and extending beyond one upright edge, the extensions being curved oppositely and secured together at their outer ends to form an upright cylindrical shell with open ends, a cylinder having an open end and an integral closed end secured in the said shell with the closed end uppermost, and a rigid projection extending from a lower portion of the upright plate beyond the same upright edge as that beyond which the flanking plates extend. The machine comprises side frames 10A, 10B, top and bottom beams 11 and 12, hydraulic cylinders 13A, 13B and a movable beam 15 having guides 16 vertically movable on slides 17. The fixed tool 19 is supported by a bolster 18 welded to the bottom beam 12. Each side frame comprises a plate 21 and flanking plates 22 with extensions 23 curved oppositely and welded at 25 to form a cylindrical shell 26. The rear and upper edges of the plates 22 are joined by a welded strip 30 and there are plug welds 31 between the plates 21 and 22. Each cylinder 48 has an integral end 49, an open end 50, and a flange 51 abutting the lower end 27 of the shell 26. The cylinder is retained by a flanged ring 52 bolted to the cylinder and resting on the end 26 of the cylindrical shell. The open end of the cylinder is closed by a bolted cap 54.