An Experimental Investigation into Trochoidal Milling for High-Quality GFRP Machining

Area of Science:

• Materials Science
• Manufacturing Engineering
• Polymer Composites

Background:

• Glass Fiber Reinforced Polymer (GFRP) is a critical material in various industries.
• Machining GFRP presents challenges due to its abrasive nature and anisotropic properties.
• Optimizing machining strategies is essential for efficient and high-quality production.

Purpose of the Study:

• To compare the effectiveness of trochoidal (adaptive) milling versus conventional milling for GFRP.
• To evaluate the impact of different end mill geometries on machining performance.
• To identify optimal machining parameters for GFRP components.

Main Methods:

• Six coated solid carbide end mills with varying geometries were tested under identical conditions.
• Key performance indicators assessed included cutting forces, surface quality, dimensional accuracy, burr formation, chip characteristics, and tool wear.
• Comparative analysis between trochoidal and conventional milling strategies was performed.

Main Results:

• Trochoidal milling achieved up to 23% faster cycle times and higher material removal rates (MRRs).
• Conventional milling offered superior dimensional control and surface finish in specific areas.
• A four-tooth cutter with a 10° helix angle and aluminum-oxide coating showed the best overall performance, balancing tool wear and surface finish (Ra as low as 1.36 μm).
• Trochoidal milling effectively managed cutting forces and reduced machining time, despite potentially higher RMS cutting forces in conventional milling.

Conclusions:

• Trochoidal milling is a viable and efficient method for GFRP machining, offering significant time savings.
• Conventional milling excels in achieving precise dimensional accuracy and specific surface finishes.
• A hybrid approach, utilizing trochoidal roughing followed by conventional finishing, presents a promising strategy for maximizing both efficiency and accuracy in GFRP component manufacturing.