Author:
Kapil Sajan,Joshi Prathamesh,Yagani Hari Vithasth,Rana Dhirendra,Kulkarni Pravin Milind,Kumar Ranjeet,Karunakaran K.P.
Abstract
Purpose
In additive manufacturing (AM) process, the physical properties of the products made by fractal toolpaths are better as compared to those made by conventional toolpaths. Also, it is desirable to minimize the number of tool retractions. The purpose of this study is to describe three different methods to generate fractal-based computer numerical control (CNC) toolpath for area filling of a closed curve with minimum or zero tool retractions.
Design/methodology/approach
This work describes three different methods to generate fractal-based CNC toolpath for area filling of a closed curve with minimum or zero tool retractions. In the first method, a large fractal square is placed over the outer boundary and then rest of the unwanted curve is trimmed out. To reduce the number of retractions, ends of the trimmed toolpath are connected in such a way that overlapping within the existing toolpath is avoided. In the second method, the trimming of the fractal is similar to the first method but the ends of trimmed toolpath are connected such that the overlapping is found at the boundaries only. The toolpath in the third method is a combination of fractal and zigzag curves. This toolpath is capable of filling a given connected area in a single pass without any tool retraction and toolpath overlap within a tolerance value equal to stepover of the toolpath.
Findings
The generated toolpath has several applications in AM and constant Z-height surface finishing. Experiments have been performed to verify the toolpath by depositing material by hybrid layered manufacturing process.
Research limitations/implications
Third toolpath method is suitable for the hybrid layered manufacturing process only because the toolpath overlapping tolerance may not be enough for other AM processes.
Originality/value
Development of a CNC toolpath for AM specifically hybrid layered manufacturing which can completely fill any arbitrary connected area in single pass while maintaining a constant stepover.
Subject
Industrial and Manufacturing Engineering,Mechanical Engineering
Reference18 articles.
1. Domain decomposition and space filling curves in toolpath planning and generation,1998
2. Generation of fractal toolpaths for irregular shapes of surface finishing areas;Journal of Material Processing Technology,2002
3. Space-filling curves in tool-path applications;Computer-Aided Design,1994
4. A tool-path generation strategy for wire and arc additive manufacturing;International Journal of Advance Manufacturing Technology,2014
5. Automated torch path planning using polygon subdivision for solid freeform fabrication based on welding;Journal of Manufacturing System,2004
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