THE MECHANICAL DEVELOPMENT OF A SHIP FRAME BENDER IN SCALE. PART I

The shipbuilding process must be made less labor intensive and more capital intensive. This report concerns the design of a computer-controlled system for the cold forming of ship frames. A machine is described which will permit cold forming of profiles by a method based on the production of a series of local deformations by means of pure moment bending rather than the more conventional three point bending. The use of pure moment bending permits the separation of the plane of moment application and the plane of deformation. This permits the design of a machine with the unique capability of bending beams with symmetrical and non-symmetrical cross-sections without out-of-plane deformation. A second advantage of this new bending process is the uniformity of the bending moment and the absence of shear forces in the bent section of the beam. The design of a one-sixth scale bending mechanism is presented, its bending efficiency is discussed relative to more conventional bending mechanisms, and the general control algorithm is described for computer-controlled operation of the bending mechanism.

• Corporate Authors:

  Case Western Reserve University

  Digital Systems Laboratory
  Cleveland, OH  United States  44106

  National Science Foundation

  Research Applied to National Needs
  Washington, DC  United States  20550
• Authors:
  • Mergler, H W
  • Wright, DKJ
  • Kicher, T
  • Savage, M
• Publication Date: 1974-6

Media Info

• Pagination: 165 p.

Subject/Index Terms

• TRT Terms: Automation; Bending moments; Cold forming; Cold working; Computers; Hulls; Information processing; Machine tools; Numerical control; Productivity; Shipbuilding; Shipyards
• Uncontrolled Terms: Ship hulls
• Old TRIS Terms: Cold bending; Frame bending machines; Shipyard mechanization
• Subject Areas: Construction; Data and Information Technology; Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00154611
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NSF/RA/T-74/164
• Contract Numbers: NSF-GI-35994
• Files: TRIS
• Created Date: May 31 1977 12:00AM