Patent GB-190428682-A (GB)
Title: Improvements in and relating to Machines or Mechanism for Rolling, Straightening and Finishing Round Metal Bars or Tubes.
Inventor: FARMER JOHN
Filed: 1904-12-29
Granted: 1905-11-16
Abstract: 28,682. Farmer, J. Dec. 29. Rolling straightening.-A mill of the kind described in Specifications No. 4425, A.D. 1877, and No. 3913, A.D. 1888, for rolling, straightening, and finishing bars or tubes is provided with two or more pairs of edge-running skew rolls A, A'. The back and front rolls A<1>, A may be simultaneously adjustable towards and from each other, the work resting on a vertically adjustable V-grooved support, or, as shown, the back rolls A<1> may be adjustable only for purposes of alignment with the side supports H, I of the vertically-adjustable, work-supporting tables G<1>, the front rolls A baiug moved to vary the pass. In three-pair mills, the middle pair may be out of line with the other pairs to facilitate the straightening of the work, and the succeeding passes may be smaller and smaller. The rolls A, A<1> are driven from the main shaft O by intermeshing wheels N secured to or in one with bevel-wheels M which gear with bevel-wheels L on'the roll spindles. Antifriction rollers M', Fig. 11, are preferably interposed between each wheel M and each housing D<1>, which is rotatably and slidably mounted in bearings E fitted with separate cap3 E<1>, E<2>, or the caps E' may be tied together in pairs by bars E<3>. Each back roll A' is rapidly adjusted by a screw A<2> and a hand.wheel A<4>, and finely adjusted by a worm A<5> mounted in slot or eccentric bushes A<6> which can be rotated by a handle A<16> to engage the worm A<5> with the wheel A<4>. Any backlash may be taken up, for example, during adjustment, by a weight R<3>, a spring R' or one on the end of the housing, a hydraulic cylinder R<5>, screws D<4> abutting against the front end of the housing D', and screws D<7>, preferably of copper, engaging the roll spindle. The worm gear A<4>, A<5> may be replaced by bevel gear. The simultaneous adjustment of the front rolls A is effected by nuts A<9>, longitudinally fixed in the housings D<1> but prevented from rotating therewith by side wings which engage grooves in the bearings E, screws AS, bevel-wheels or worm gearing A", A<12>, and a shaft J which can be rotated by power or by a hand-wheel K. The shaft J may be mounted in eccentric bearings A<13> fitted with handles J<9> so that the worms and wheels A<12>, A<11> may be disengaged and the rolls A rapidly and independently adjusted by hand-wheels applied to the squared ends of the screws A<8> or otherwise ; the fine adjustment of the rolls A relatively to each other is effected by having the shaft J in sections angularly adjustable with respect to each other, having the worms A<12> loose on the shaft J, or the wheels A<11> loose on the screws A<8> and capable of being clutched thereto in any angular positions. Various means for so effecting the said adjustment are described in the Specification. The skewing of the back and front rolls in opposite directions is effected by sectors D<8> on the housings and by rack-bars T which are moved in opposite directions by rack-and-pinion gearing or by screws T<5> operated by bevel or worm gearing T<7>, T<8> and a belt-driven shaft T<9>. This skewing-mechanism may be dispensed with, the housings being then rotated by tommy-bars placed in holes D<9> through angles indicated by pointers O<1> and graduated scales S on the housings and bearing caps E<2>, and then locked by set-screws in the caps and grooves in the housings. When the work has passed nearly once through the machine, it may be returned by reversing the driving-engine or the main shaft 0, instead of the skew of the rolls. The side supports H, Figs. 3 and 5, of the tables G<1> are not attached to the tables, and have curved faces forming a continuation of the surfaces of the rolls A, A<1> when in their unskewed positions ; or rollers I of the same size as, and aligned with, the rolls may be used. The work is kept up to the plates or rollers H, I by rollers H<1> or plates on weighted levers I<3> controlled by ropes I<7>. The detached scale falls through openings F<2> in the frame F.