The client had to renew a wore down rotor with knife segments for which they didn't have any documentation. Rotor was not operating well anymore and renewal was absolutely necessary.
Problem definition:
- a need for renewal of a product without any production documentation or 3D model
- critical production, no time for long downtimes
- large wear made it impossible to do direct copying
- complex geometry prevents the usage of manual technics of 3D modelling
- demands for high accuracy due to rotary motion
Solution
With the use of leading equipment for 3D scanning and reverse engineering we successfully performed the following:
- 3D scanning of 4 positions (2 positions of knives, rotor and push-knife segment) with the accuracy of 0,03 mm
- reverse engineering (creation of functional CAD model) of all segments based on scanned data
- reconstruction of wore down areas according with customer's instructions
Benefits
- dimensional accordance of replacement parts
- short production down-time because of scanning
- restored original functionality and productivity of the equipment
Wore down rotor with mounting spots for the segment of push-knife
Push-knife segment
Interim comparisson of scanned vs CAD data
Final result (half), representing actual state and prepared for further CAD/CAM operations
