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FastSHAPES Lobster Back Bend software program

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Lobster Development Software

FastSHAPES® is the generic name for a suite of Plate & Sheet development software programs specifically designed for heavy fabrication where the main jointing technology is welding.

The LOBSTER software module is for the development of tapered segmental bends, commonly known as lobster back bends, in sheet and plate.

TECHNICAL DESCRIPTION
LOBSTER provides a multi-gored bend between two ducts.
Ducts have circular cross-sectional shape.
Duct size remains constant between inlet and outlet.
From 2 to 10 gores permitted.
Bend angle from 1 degree to 180 degrees.
Collars optional, integral when specified
Bend radius on inside, outside or centreline of bend.
Up to 8 longitudinal seams per gore.
Uses Triangulation development method as standard.
Also `AutoNest' & radial line development.

downarrowDATA REQUIREMENTS
bullet pointInternal diameter
bullet pointPlate thickness
bullet pointBend Angle
bullet pointBend Radius and location (inside/outside/centreline)
bullet pointNumber of Gores
bullet pointCollar lengths (optional)
bullet pointLongitudinal Seam Locations
bullet pointGreen, and seam offset dimensions.
bullet point'AutoNest' seam location data (optional)

OUTPUT
bullet pointFastCAM file
bullet pointDXF (2D) file
bullet pointCoordinate Table
bullet pointA 3D DXF file describing the complete structure.

PROGRAM REFERENCE
M3FS13 : LOBSTER
DOC : FastSHAPES Terminology and more on Lobsterback Fabrication
YOUTUBE : Associated tutorial on FastCAM TV

OTHER REFERENCES
M3FS9 : OBCONE (Oblique Cone = Circular Transitions )
M3FS11 : BEND (Rectircular cross-section bends)
M3FS12 : ELBOW (Reducing circular cross-section bends)
M3FS21 : PENSTOCK (General right-circular-conical bends)



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lobster back bend development for sheet metal and plate lobster data layout