Patent GB-116928-A (GB)
Title: An Improved Process And Apparatus for Rolling Metals.
Inventor: MCKIBBIN JOHN BECK
IPC: B21B1/38
Filed: 1917-06-28
Abstract: 116,928. McKibbin, J. B., and Sugden, E. J. June 28, 1917. Angular bending; rolling.-Apparatus for rolling sheet metal, whereby a slab may be reduced in thickness and doubled upon itself any desired number of times to form a pack ready for the final shearing whereby a number of separate similar sheets are produced comprises a heating furnace A wherein the slab is initially heated, a mill B for trimming the edges of the slab, rolls 8 for increasing the length and reducing the thickness of the slab, rolls 17, 18 for doubling the sheet, reheating furnaces E wherein the blank is passed to and fro a number of times, further reducing rolls 50, rolls G for again doubling the blank, and further rolls 54 from which it passes to additional reheating furnaces, and so on according the required reduction in thickness and increase in length. The blank from the furnace A passes down an inclined slide 2 to a conveyer 3 and is guided by a curved guide 2<1> and rolls 4 to grooved edging-rolls 5 from which it passes to one 9' of a pair of feed tables with driven feedrollers 11, 11<a>, 11<b>, 11<c> connected to raising and lowering-mechanism which is arranged in either side of a three-high mill C having rolls with plural faces 8a, 8b for single and double thicknesses. The slab is passed through the lower rolls of 8<a> and is returned on elevating the table 10 through the upper rolls to the front of the mill C. It is then moved on to rollers 11<b> and passed beneath the lower of the rolls 8<b> to the table 10. The blank is then doubled by the rolls of the doubler D and returned to the front of the mill through the upper rolls of 8b. The slab is then moved forward through the lower rolls of 8b and then passes to a re-heating furnace E, the upper roll of the doubler D having been moved out of the way by means of a fluid-pressure cylinder 23, Fig. 8. The roll 17 of the doubler D is adjusted with its bearing 19 towards the roll 18 by a transverse yoke 20 and a lever provided with a foot treadle. The cylinder 23 is secured to a spindle 26 which is tapered at 27 and toothed at 44, Fig. 14, to engage a spindle 29 driven by wheels 32, 33, 34. A semi-circular returning-guide 24, Fig. 11, surrounds the back portion of the roll 18 and a depressing guide 25 is mounted above it. The doubler has a stationary table 35 and a verticallymoving table 36 forming the end of a cylinder with a projection 36a which is moved downwardly to double the blank. The reheating-furnaces E comprise series of geared carrying rollers 45, terminal feed-rollers 47, and reversing guides 47a, and are connected by a bridge 48. The blank thus travels at successively higher and lower levels and is finally received at the original level by a table 49. The blank then passes to a two-high reducing mill F, a stationary table 51, a doubler G, a two-high mill H, reheating furnaces I, I, Fig. 1<a>, two-high mills J, feed-table 55, and to a doubler K which produces eight-ply pack which is passed through the fourth two-high mill L. The ends of the blank and the doubled-ends are sheared off to produce the separate sheets. When the blank is comparatively narrow and requires a longer exposure to the heat, the construction of furnace shown in Fig. 15 is used. The blank is initially heated in the furnace A<1> and passes to the reheating-furnace A<2> provided with elongated feed-rolls 58, 59, and water-cooled geared rollers 60. The blank travels to and fro at successively higher levels, is then shifted laterally by guides and travels to and fro at successively lower levels, the lateral shifting being repeated a number of times, and the blank is then passed out of the furnace at the level at which it entered, and is fed to a second similar furnace and then to a three-high mill C and forward as previously described.