Patent GB-1325111-A (GB)
Title: Combination rolling mills
IPC: B21B13/06
Filed: 1971-04-19
Abstract: 1325111 Rolling milts BLAW-KNOX CO 19 April 1971 [2 March 1970] 23345/71 Heading B3M A rolling mill suitable for rolling beams, plates or structural products (i.e. products rolled to their finished shape using grooved rolls) includes two stands 1 and 4 in tandem (Fig. 1 in plan) each of which is loadable with a rollcontaining cartridge, the stand 1 having one fixed housing 2 and one movable one 3, and the stand 4 being shiftable out of the mill rolling line. Roller tables 8, 12 and 13 are located on the entry and exit sides of the stands, the tables 12 and 13 being movable bodily respectively along and transverse to the rolling line. For rolling beams, Fig. 2, the stand 1 houses a universal cartridge 5 and the stand 4 a cartridge 6, the cartridges being shown in the Figure after movement out of the stands and on to a roll-changing carriage 14. To insert alternative cartridges 28 and 29 into the stands, the carriage is shifted by a cylinder 23 until the cartridges are aligned with the stands. The cartridges are then inserted in the stands by cylinders 31 and 32. With the cartridges 28 and 29 the mill is adapted for rolling plates, the housing 3 of the stand 1 first being moved outwardly to accommodate the greater width of the product. For rolling structural products, Fig. 4, the stand 4 is shifted out of the rolling line, and a cartridge 33 is inserted in the stand 1. The roller table 12 is moved along the rolling line to take the place of the stand 4, and the table 13 is shifted laterally to take the place of the table 12. A typical cartridge (Fig. 17, in plan) has side walls 93 connected by end yokes 112, the walls being provided with shelves for supporting the roll chocks. Screw-downs 113 and balance cylinders 114 are provided for the vertical rolls, the screw-downs being coupled at 112 with driving shafts 123 when the cartridge is inserted in a mill. The horizontal rolls are adjustable by the screw-downs 73, 74, 64 and 66 of the stand (Fig. 10). The holes 143, 146 and 147 in the walls of the cartridge serve both to locate the cartridge within the stand, with the help of connectors 14, 145 and 142, and to supply coolant and lubricant to the rolls of the cartridge. For this latter purpose the connectors and walls are provided with suitable connecting passages (Figs. 25-29, not shown). Alternative holes 143 are provided to accommodate different positions of the movable housing 2 (Fig. 10), the housing being located in position by a detent 92 and recesses 89. Wheels are located at the bottom of the cartridge, the wheels running on rails 26 in the stand. The wheels can either drop into recesses in the rails, when the cartridge is located in position, or can support the cartridge during rolling. Axial adjustment of the horizontal rolls in the cartridge is possible by wedge assemblies between the roll chocks and the cartridge walls (Fig. 20, not shown), the assemblies are movable vertically by screws and co-operate with vertical slots in the wedges to shift the wedges axially. The stands are clamped to supporting rails 37-39, Fig. 7, by hydraulically operated arms 43 and clamps 41 and 46. Guides 170 and 57 are provided adjacent the stands, the guides 170 each being in the form of a pair of shoes which can be pivoted out of the rolling line. The shoes are adjustable by screws (Fig. 20, not shown) both to vary the separation of the shoes and to shift them both laterally off the rolling line. The roller tables are pivotable about axes 161 to suit them to different workpiece thicknesses. The screw downs of the stand 1 are coupled by splined shafts (Fig. 11, not shown) so that they operate in synchronism despite changes in the spacing of the housings.