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Key Features and Requirements:
High Rigidity and Vibration Dampening: To resist cutting forces and suppress vibrations (preventing chatter), boring bars are typically made from high-strength alloy steels or heavy-metal materials. This ensures machining stability and surface quality.
High Precision: High-quality boring bars are manufactured to very tight tolerances, guaranteeing minimal tool runout after assembly, which is a prerequisite for high-precision hole machining.
Internal Coolant Channels: Modern boring bars are often designed with internal coolant-through channels that deliver cutting fluid directly to the cutting edge, providing effective cooling, lubrication, and chip evacuation.
Modularity and Flexibility: Many boring bars feature a modular design, allowing them to be combined with different extension bars or boring heads to adapt to holes of varying depths and diameters.
Main Types:
1.Roughing Boring Bars: Optimized for metal removal rate, emphasizing extreme rigidity.
Finishing Boring Bars: Used for the final finish pass, requiring supreme accuracy, balance, and vibration dampening, often equipped with fine-adjustment mechanisms.
Modular Boring Bars: Consist of a basic shank, extension bars, and a boring head, offering great machining flexibility.
Twin-Cutter Boring Bars: Feature two symmetrical inserts that balance radial cutting forces, improving machining efficiency and stability.
In summary, the boring bar is a sophisticated link in the machining chain, whose quality and design directly determine the capability to produce accurate, high-quality bores, especially in challenging deep-hole applications.
