[Realization of algorithm on finishing optimization-tool-path generation for high-speed machining molar crown]

Area of Science:

• Biomaterials Engineering
• Manufacturing Technology
• Computer-Aided Design/Manufacturing (CAD/CAM)

Context:

• Molar crowns present significant manufacturing challenges due to their small size, thin walls, and complex occlusal surfaces with intricate cusps, ridges, and fossae.
• Conventional machining methods struggle to achieve the required speed and precision for fabricating molar prostheses.
• The complexity necessitates advanced digital manufacturing techniques for efficient and accurate production of dental restorations.

Purpose:

• To develop and present an algorithm for rapid offset-based machining of STL (Standard Tessellation Language) formatted molar crowns.
• To enhance the machining velocity and improve the surface precision of molar crowns.
• To generate efficient finishing toolpaths for high-speed milling of dental prostheses.

Summary:

• An algorithm utilizing entity rapid offset based on STL format was developed for machining complex molar crowns.
• The method incorporates Zigzag toolpath planning and micro-machining cutters to generate finishing toolpaths for high-speed milling.
• A molar all-crown made of aluminum alloy was successfully machined on a Mikron UCP800 high-speed machine center, demonstrating the algorithm's effectiveness.

Impact:

• The developed algorithm significantly increases machining velocity and improves surface precision for molar crowns.
• The generated toolpaths are efficient, resulting in a reduced number of toolpaths and smooth cutter feed.
• This advancement offers a faster and more accurate method for producing dental prostheses, potentially improving patient outcomes and reducing chair time.