Patent GB-1100465-A (GB)
Title: Improvements in or relating to roller feeds for strip processing machine tools
Inventor: HAWKINS HAROLD FREDERICK
IPC: B21D43/09
Filed: 1964-06-24
Abstract: 1,100,465. Metal sheet feeds; straightening. HUMPHRIS & SONS Ltd. 22 June, 1965 [24 June, 1964 (2)], Nos. 26121/64 and 26123/64. Headings B3E and B3W. [Also in Division B6] A pinch roller unit for feeding strip material comprises a pair of side plates 10, Fig. 2, and 11, Fig. 1, joined by transverse plates 12, 13 14, a roller 15 mounted in bearings 16 carried in the plates 10 and 11 and a roller 17 mounted in bearings 18 which are supported by a pivoted carrier. The carrier comprises two arms 19 connected by three welded plates 20, 21, 22, the arms 19 being pivoted on a fixed shaft 23 extending through the plates 10 and 11. An hydraulic or pneumatic ram 24 acts on the plate 20 to force the upper roller against the lower roller. The rollers are separated by spring loaded rods 30 which act on extensions 31 of the arms 19. In a modification the rollers are urged together by springs and are separated by cams 32 acting on the rods 30. A flat horizontal fed plate 35 is arranged with its upper surface in a plane which contains the line of contact of the rollers. Guide wheels 36 are provided on the plate and are arranged so that portions of the wheels enter a groove extending transversely of the plate 35, the strip to be guided thus has a line contact with the sides of the wheels. The pinch rollers are driven through gear wheels 40 provided at the ends of the rollers. The gears 40 mesh respectively with gears carried on the fixed shaft 23 and stub shafts 43. These latter gears also mesh with one another. The drive mechanism may be a rock and pinion or a crank. In a modification, Figs. 5 to 9 (not shown), the gears at one end of the rollers are in mesh and at the other end the lower roller has a one-way clutch 61 and a gear wheel 62 which meshes with a quadrant 63, pivoted on a shaft 65. The quadrant is connected by a link 64 to a crank driven by the press. A brake 68 on the lower pinch roller prevents back lash. The rollers may be driven by an hydraulic motor. A leveller unit, Figs. 12 and 14 (not shown), comprises two side plates 75, 76 carrying a series of lower rollers (77) connected by a gear train 82. The end wheels 83 of the train extend beyond the side plates to facilitate meshing these wheels with the gear wheels on the lower pinch rolls of two pinch roller units mounted close against each end of the leveller so that the drive for the leveller can be taken from the pinch rolls. The upper rollers are connected together by a gear train 85 and the two trains are connected by further gear wheels. The upper rollers are adjustable by moving the chocks (79) by a number of adjustable rods (89), Fig. 13 (not shown). A measuring roll unit, Figs. 15 and 16 (not shown), comprises two end plates (90, 91) connected by a member (92) and carrying a lower measuring roller (94). An upper roller (93) is carried in blocks (95, 96) and can be forced against the lower roller by an hydraulic ram (98). One end (99) of the lower roller is adapted for connection to a drive cable leading to a measuring and controlling unit. The various units may be assembled in any desired relationship on a common base plate and may also be combined with a reciprocating gripper feed mechanism and a shear.