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US 4,048,827 AGranted
Apparatus for forming a large diameter pipe
OwnerXaver Lippinventor
Life of this patent
Estimating the term…
Abstract
An apparatus for helically winding a strip of sheet metal into a large diameter pipe and connecting the edges of the strip by preforming and rabbeting. The edge bending for the rabbet is done in a preforming station and a rabbeting station in which the bends are sequentially and increasingly formed with multiple units at each station. Adjacent units are hinged and devices for adjusting the angular relationship between adjacent units are provided, including spacers and adjustable threaded devices. Gears permit driving multiple units at various adjustment angles.
Claims11
An apparatus for helically winding sheet metal to form a larger diameter pipe comprising
- means for forming and interconnecting adjacent edges of the sheet by rabbeting, said means including a profiling station and a rabbeting station,
- each of said stations including a plurality of processing units and each of said units having pairs of processing rolls for forming said edges, said pairs of rolls being disposed along an arcuate path,
- said units in each station being serially arranged to sequentially form said edges;
- drive means for driving said rolls;
- hinge means interconnecting adjacent ones of said units for relative pivotal adjustment about substantially parallel axes;
- and
- means connected to said units for adjusting the angular relationship between adjacent ones of said units comprising a threaded spindle rotatable about an axis perpendicular relative to said substantially parallel axes and threadedly engaging adjacent ones of said units.
4 more elements
An apparatus for helically winding sheet metal to form a large diameter pipe comprising
- means for forming and interconnecting adjacent edges of the sheet by rabbeting, said means including a profiling station and a rabbeting station,
- each of said stations including a plurality of processing units and each of said units having pairs of processing rolls for forming said edges, said pairs of rolls being disposed along an arcuate path,
- said units in each station being serially arranged to sequentially form said edges;
- drive means for driving said rolls;
- hinge means interconnecting adjacent ones of said units for relative pivotal adjustment about substantially parallel axes;
- means connected to said units for adjusting the angular relationship between adjacent ones of said units;
- and
- rigid spacer means releasably connected between adjacent ones of said units at points spaced from said hinge means.
5 more elements
An apparatus for helically winding sheet metal to form a large diameter pipe comprising
- means for forming and interconnecting adjacent edges of the sheet by rabbeting, said means including a profiling station and a rabbeting station,
- each of said stations including a plurality of processing units and each of said units having pairs of processing rolls for forming said edges, said pairs of rolls being disposed along an arcuate path,
- said units in each station being serially arranged to sequentially form said edges;
- drive means for driving said rolls;
- hinge means interconnecting adjacent ones of said units for relative pivotal adjustment about substantially parallel axes;
- and
- means connected to said units for adjusting the angular relationship between adjacent ones of said units, said means for adjusting including
- second hinge means for pivotally connecting adjacent units;
- means for mounting said second hinge means for sliding movement along said units;
- and
- means for adjusting the location of said second hinge means relative to said first hinge means.
8 more elements
An apparatus for helically winding sheet metal to form a large diameter pipe comprising
- means for forming and interconnecting adjacent edges of the sheet by rabbeting, said means including a profiling station and a rabbeting station,
- each of said stations including a plurality of processing units and each of said units having pairs of processing rolls for forming said edges, said pairs of rolls being disposed along an arcuate path,
- said units in each station being serially arranged to sequentially form said edges;
- drive means for driving said rolls;
- hinge means interconnecting adjacent ones of said units for relative pivotal adjustment about substantially parallel axes;
- and
- means connected to said units for adjusting the angular relationship between adjacent ones of said units,
- said pairs of rolls in two adjacent units including pairs of gear means coaxially connected to said rolls for driving said rolls,
- and wherein said drive means includes
- an intermediate drive gear in meshing relationship with one gear means of one roll in each of said two units,
- said intermediate gear being rotatable about the pivot axis of said hinge means,
8 more elements
An apparatus for helically winding sheet metal to form a large diameter pipe comprising
- means for forming and interconnecting adjacent edges of the sheet by rabbeting, said means including a profiling station and a rabbeting station,
- each of said stations including a plurality of processing units and each of said units having pairs of processing rolls for forming said edges, said pairs of rolls being disposed along an arcuate path,
- said units in each station being serially arranged to sequentially form said edges;
- drive means for driving said rolls;
- hinge means interconnecting adjacent ones of said units for relative pivotal adjustment about substantially parallel axes;
- and
- means connected to said units for adjusting the angular relationship between adjacent ones of said units;
- and wherein each of said stations further includes
- a flat mounting plate for supporting said units;
- means in said plate defining a plurality of elongated holes;
- means in each of said units defining elongated holes;
- attachment means selectably placeable in said holes in said plate and said units to adjustably define the operating positions of said units.
9 more elements
Dependencies are inferred from the claim text.