By Eric Bornemann Roll Bender ELM 4701 November 2008

 Roll benders/(ring rolls) are widely used in the metal fabrication industry  CNC rollers are ideal for repeat jobs and or parts  Typical uses include hand rails, motorcycle frames, radii gussets Background Information

Design and fabricate a CNC Roll Bender Problem Statement

Existing Example Top roll Drive rolls

 Minimum Capacity (steel) -Angle 2 x2 x ¼” -Square 1 ¼” -Square tube 2 x 2 x 1/8” -Schedule 40 pipe 2” -Round 1 ¼” -Channel 2 ½” Design Requirements  User Interface -Top roll position display -Ability to store and recall common positions -Manual controls for top and drive rolls

Bending Method Concept Selection Single PinchTriple Pinch Stationary Drive Rolls Part Drive Rolls Pinch

Control Method Concept selection Method One  User selects die package  User inputs material length  User inputs required radius  User presses go  Top roll indexes appropriately  Drive rolls feed part through  Top roll returns to top position Method Two  User sets top roll to desired position  Saves location  Recalls program when desired  Insert part and press SET  Top roll indexes appropriately  Manually feed part through  Press RESET  Top roll returns to top position

User Interface E-Stop OnOff Viewer Screen Keypad 7 Seg. Top Roll Drive Rolls SetReset

Controller Concept Selection Requirements -Flash memory -Compatibility with user interfaces -Ease of mounting -Ease of programming PLC -Meets requirements -More practical HMI options directly compatible with PLC

Questions ?