GB1461859A - Plant for straightening elongate workpieces - Google Patents

Abstract

1461859 Straightening by rolling T H KIESERLING & ALBRECHT 17 Oct 1974 [18 Oct 1973] 45093/74 Heading B3M Apparatus for straightening an elongate workpiece comprises a plurality of aligned straightening stations each having a fixed roll supporting the workpiece and a roll movable towards and away from the workpiece, and a common shaft for simultaneously moving all the adjustable rolls, the workpiece being fed to the stations in a direction transverse to the line of stations. Fig. 2 shows one station of a skewrolling machine wherein each upper roll is raised to allow the workpiece to be fed in or out, as well as being adjustable to accommodate different workpiece diameters. All the upper rolls are raised together by rotation of a crankshaft 14, connected to each roll by a con. rod 64. The crankshaft is driven at its mid-point by a hydraulic piston and cylinder and toothed quadrant arrangement, Fig. 6 (not shown), or by the arrangement in Fig. 9, where transmission 38, 39 is driven by shaft 35 equipped with brake 36 and connectible by clutches 34, 43 to either of pulleys 30, 31 driven by belts 32, 33, whereby the crankshaft can be driven at slower speed for that part of each revolution where the rolls are being lifted off the rotating workpiece, to ensure precise simultaneity of movement. The effective lengths of all rods 40 can be adjusted simultaneously by a screw-thread arrangement 65, Fig. 2, operable by a splined head (29) on each rod meshing with a fixed pinion (28) driven by a common shaft (13). Workpiece guides 55 are raised simultaneously with the upper rolls by pitmans 54, 56 on shaft 14.