Patent GB-1018016-A (GB)
Title: Apparatus for uncoiling and processing metal strip
IPC: B21C47/34
Filed: 1964-03-19
Abstract: 1,018,016. Uncoiling. PRODUCTION MACHINERY CORPORATION. March 19, 1964 [April 1, 1963], No. 11790/64. Heading B3E. Apparatus for uncoiling and processing a metal strip comprising a coil supporting mandrel, a set of pinch rolls and a first working roll between the pinch rolls and mandrel which defines a horizontal pass for the strip is characterized in that a second working roll is positioned between the first working and pinch rolls below the pass to define a sinuous path for the strip coming from the coil. The apparatus comprises a buggy assembly located in a pit, and movable transversely and vertically to load a coil C on to an expandable mandrel 40, a coil drive mechanism 22, a working stand 24, a tandem pinch roll assembly 26 and a five roll leveller 28. The mandrel 40 is connected to a drag generator which may exert a drag effect on the strip or be used as a coil driving motor, a magnetic brake 46 co-operating with an extension of the generator shaft to hold the mandrel stationary. The coil may also be driven by the mechanism 22 comprising a knurled motor 56 driven, roll 50 mounted on a frame 52, pivotally connected to a stand 24, which is lowered by a pair of hydraulic cylinders 62 to bring the roll into driving contact with the outer convolution of the coil. The two pairs of pinch rolls 70, 72, 80, 82 and the five leveller rolls 90, 92, 94, 96, 98 are motor driven and the upper rolls of each set are provided with vertical adjusting means. The stand assembly 24 comprises rotatably mounted small and large diameter working and backing up rolls 130, 132 and a transversely extending shelf 146, all of which are vertically adjustable, and a fixed position working roll 150, having a larger diameter than that of the roll 130, the upper surface of which is aligned with the nip of the pinch rolls. A threading apron assembly 112 comprises a transversely extending apron 160 pivotally mounted at its ends coaxially with the roll 150 and having forwardly extending cam fingers 172 mounted in a recess 170. A peeler assembly 114 comprises a head 180, having a cam plate 182 and knife-edged fingers 184, which is reciprocated by hydraulic cylinder means along guides 194, 196, the assembly being pivotally mounted on trunnions 206 and tiltable via hydraulic means 210. In operation a coil is located on the mandrel 40 and engaged by the driving roll 50 and the peeler head 180 advanced so that the fingers 184 interengage with the cam fingers 172 and pivot the threading apron 160 into its upper position whilst the fingers engage the leading edge of the coil and deflect it over the apron and roll 150 across the shelf 146, the rolls 130, 132 and shelf having been raised to their uppermost position, into the pinch rolls and leveller units which commence to draw the strip from the coil at which point the roll 50 is declutched so that no driving force is transmitted thereto. Subsequently the peeler head 180 is retracted which allows the threading apron 160 to swing clear and the rolls 130, 132 lowered to engage the strip and deflect it into a sinusoidal path.