Operating Properties of Deep Hole Boring Tools with Modified Design

Area of Science:

• Mechanical Engineering
• Materials Science

Background:

• Deep hole boring tools are critical in precision manufacturing.
• Optimizing tool design can enhance performance and reduce vibrations.
• Previous designs may have limitations in stability and material damping.

Purpose of the Study:

• To investigate a revised design for a deep hole boring tool.
• To evaluate the impact of structural modifications, specifically to the shank, on tool performance.
• To assess the viability of using polymer concrete and rubber-doped polymer concrete in tool shanks.

Main Methods:

• Theoretical analysis using 3D modeling and Finite Element Method (FEM) for strength testing.
• Experimental modal analysis and static analysis to compare dynamic and static properties of original and prototype tools.
• Operational boring tests on various workpiece materials to evaluate surface geometric structure (SGS) parameters like roughness (Ra, Rz).

Main Results:

• Theoretical analysis showed reduced displacement for modified shanks: 14.59% for polymer concrete and 4.84% for rubber-doped polymer concrete (SBR-styrene butadiene rubber).
• Experimental tests compared dynamic and static properties of the original and prototype boring bars.
• Operational tests assessed surface geometric structure (SGS) parameters, including roughness (Ra, Rz), during boring.

Conclusions:

• Modified deep hole boring tool designs with polymer concrete or SBR-styrene butadiene rubber-doped polymer concrete shanks demonstrated reduced displacement in theoretical and experimental stages.
• Despite initial positive findings in theoretical and experimental analyses, the operational study indicated that the revised boring bar design is not recommended for practical application.