Patent GB-818878-A (GB)
Title: Rolling mill
Inventor: HITCHCOCK JOHN HUBERT
IPC: B21B1/18
Filed: 1957-08-09
Abstract: 818,878. Rolling. MORGAN CONSTRUCTION CO. Aug. 9, 1957, No. 25162/57. Class 83 (4). In a rolling mill with a series of roughing stands, a series of intermediate stands and a series of highspeed rod-finishing stands, the intermediate stands include two stands having relatively large rolls, each preceded by a stand on the same pass line having relatively small rolls. A mill preceded by a billet unscrambler and a reheating furnace, Fig. 2, consists of roughing stands 1-7, intermediate stands 8-15 and rod-finishing stands 16-21. Two of the intermediate stands 13 and 15, Fig. 3, have large rolls 94, 95, Fig. 3, and each is preceded by a stand, 12 and 14 respectively, which has smaller rolls 84, 85. The stands 13, 15 are operative when rolling heavy products and the stands 12, 14 idle, the reverse applying when rolling small products with the exception of the rolling of sizes below 5/16 inch diameter when stands 12-15 are all in use. The stands 12-15 are provided with a parallelogram roll-adjusting mechanism 86 as well as a screwdown 88 and an hydraulic roll-lifting apparatus 87. The stands 14 and 15 may be provided with vertical precision finishing rolls in an attached housing 111. The stands are either individually driven, driven in pairs or in the case of finishing stands 16-21 are driven by a motor 64. The mill may roll wire-rod or bars from 0.207 to 2 inch diameter, wire-rod up to ¢ inch diameter being finished in stands 16 to 21 as required, while precision rounds #-¢ inch diameter and rod sizes 9/16-1“ inch are finished in stands 12 and 14. Large rounds 1<SP>5</SP>/ 16 -2 inch diameter are finished in the stands 13 and 15 and are delivered to a cooling bed served by a hot run-out table 14 with a flying shear. The large rounds are reversed between stands 9- 14 on skew Y-reversing tables 68, 71, 74 and 76 having motor-driven inclined rolls which urge the bars against guides as they leave and approach the stands, the rollers also acting to feed the bars to the stand. In multistrand rolling of small rounds guide pipes 66 are located between stands 7 and 8 and the stock is guided from stand to stand of the intermediate series in the grooves 107 of repeaters 67, 69, 73, 75 and 77 which are detachable from the reversing tables. The work is further guided between stand 1 by guide troughs such as 72. The wire-rod up to ¢ inch diameter after finishing in one or other of the rolls 16 to 21 is delivered to the laying reels 22, the finished coils being carried away by reel conveyers 23 to a main conveyer and a hook carrier. Precision rod #-¢ inch diameter and rod between <SP>9</SP>/ 16  and 1“ inch diameter is finished in stand 14 and may be delivered through pipes to the pouring reels 18 and then to the conveyer or alternatively may pass to the cooling bed. Square bars, concrete reinforcing bar, hexagons and nut flats may be rolled, finishing in either stand 14 or 15 depending on the size of the product. Using stands 13 and 15 as leader and finishing passes angles up to 4 X 4 inch and up to 4 inch beam and channel sections may be rolled. During the rolling of rod and like products the vertical edging stands E1, E2, E3, E4 are idle. The mill is provided with strap handling apparatus and coilers. A crop and cobble shear 65 is provided between stands 7 and 8. U.S.A. Specification, 2,105,258 is referred to.