Metal web handling method, apparatus and coil construct
OwnerJohn W. Rogersinventor
Life of this patent
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Abstract
The disclosure includes method and apparatus for handling elongated webs of sheet metal, and a sheet metal construct formed as an intermediate product and comprising a parent coil pre-divided into a plurality of daughter coils. In one method sequence, separation can be completed by the end user of the coil just before it is fed into a press or the like. In another method sequence, separation is completed during wrapping of the parent coil. In still other sequences, completion of separation can be accomplished at stages intermediate these two. Slitting may be done directly off a mill. Edge trim strip may be wound as part of the parent coil to simplify scrap handling, and may be used to protect the coil in transit.
Claims24
A method of shearing an elongated web of sheet metal by opposed rotary shearing cutters into a plurality of laterally spaced, elongated strips having continuous, oppositely facing, frangibly interconnected side edges defining uninterrupted parting lines between adjacent strips, comprising the steps of:
- (a) passing said web between said rotary cutters;
- (b) maintaining the surface of said web contiguous with the edges of said cutters;
- and
- (c) causing the cooperating edges of said cutters to penetrate the surface of said web over the full circumference of said edges, said penetration being to the point of severance of said web over a portion of the length of said parting line and to a point short of severance over another portion thereof producing a residuum of partially sheared unsevered metal interconnecting the oppositely facing side edges of adjacent strips.
In slitting apparatus having cooperating rotary slitting cutters which engage the opposite surfaces of an elongated web of sheet metal in shearing relationship to define a parting line and which force the metal downwardly on one side of said parting line and upwardly on the other side thereof whereby a step is formed in the web along said parting line to an extent sufficient to effect severance of said web along said parting line, the improvement which comprises:
- (a) means associated with said cutters for reducing the extent of said step to less than that required for severance of said web;
- and
- (b) means downstream of said cutters in the material flow sense for urging the soformed step back into the plane of said web without severing said web.
A method of shearing an elongated web of sheet metal by opposed rotary shearing cutters along an uninterrupted parting line defined by the oppositely facing side edges of the the sheared metal and containing a residuum of partially sheared unsevered metal interconnecting said side edges maintaining the sheared parts of said web together, comprising the steps of:
- (a) passing said web between said rotary cutters;
- (b) continuously maintaining the surfaces of said web contiguous with the edges of said cutters to form by the cooperative engagement of said cutter edges with said web a step in said sheet metal along said parting line to an extent sufficient to cause said sheet metal to break apart;
- and
- (c) at selected locations along said parting line reducing the degree of engagement of at least one of said cutter edges with said web to reduce the extent of said step to less than that required to cause said sheet metal to break apart, whereby said step of reduced extent provides said residuum of partially sheared unsevered metal connecting the sheared parts of said web together.
A method of shearing an elongated web of sheet metal by opposed rotary shearing cutters into a plurality of laterally spaced strips frangibly interconnected along uninterrepted parting lines between adjacent strips, comprising the steps of:
- (a) passing the metal web between said rotary cutters;
- (b) continuously maintaining the surfaces of said web contiguous with the edges of said cutters to form by the cooperative engagement of said cutter edges with said web a step in said sheet metal along said parting line to an extent sufficient to cause said sheet metal to break apart;
- and
- (c) maintaining the so-formed severed strips of sheet metal in contiguous side-by-side relation while pressing said strips along said parting lines to form a longitudinal joint between adjacent strips.
Dependencies are inferred from the claim text.