Outer Contour-Driven Ruled Surface Generation for Linear Hot-Wire Rough Machining.

Area of Science:

• Manufacturing Engineering
• Computer-Aided Design (CAD)
• Computational Geometry

Background:

• Linear hot-wire machining requires efficient toolpath generation to avoid collisions.
• Manual design of toolpaths can be time-consuming and suboptimal.
• Generating collision-free surfaces is crucial for automated manufacturing processes.

Purpose of the Study:

• To propose a novel method for generating collision-free ruled surfaces for linear hot-wire rough machining.
• To develop an iterative algorithm that optimizes ruled surfaces for maximum material removal.
• To demonstrate the effectiveness and practicality of the proposed method through physical examples.

Main Methods:

• A novel observation: ruled surfaces from smooth curves approximating contour lines without collision enable material removal.
• An iterative algorithm alternating between viewpoint computation (using a genetic algorithm) and constrained curve optimization (using adaptive fitting).
• Collision-free constraint is maintained throughout the curve approximation process.

Main Results:

• The proposed method successfully generates a small set of collision-free ruled surfaces.
• Physical examples demonstrate the feasibility and practicability of the technique.
• The automated method achieves lower errors compared to manual designs for the same number of cuts.

Conclusions:

• The developed iterative algorithm effectively generates optimal ruled surfaces for hot-wire machining.
• The method offers a significant improvement over manual design in terms of accuracy and efficiency.
• This approach enhances automated manufacturing by providing precise and collision-free toolpath generation.