An acoustic emission-based method for determining contact between a tool and workpiece at the microscale

被引：19

作者：

Bourne, Keith A. ^{[1
]}

Jun, Martin B. G. ^{[2
]}

Kapoor, Shiv G. ^{[1
]}

Devor, Richard E. ^{[1
]}

机构：

[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

[2] Univ Victoria, Dept Mech Engn, Victoria, BC V8W 2Y2, Canada

来源：

JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME | 2008年 / 130卷 / 03期

关键词：

D O I：

10.1115/1.2917285

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An acoustic emission-based touch-off detection system has been developed to determine contact between a rotating microtool and a workpiece surface with micron-level accuracy. The system has been implemented on an existing three-axis microscale machine tool. The system has been tested with microendmills as small as 50 mu m in diameter and microdrills as small as 254 mu m in diameter. The accuracy of the system has been found to depend on tool geometry and workpiece surface characteristics and is generally on the order of 1 mu m. An analytical model has been constructed to predict touch-off detection error. The calibrated model has been shown to predict surface overshoot and undershoot trends quite well. Simulations have shown that touch-off error is dominated by part surface roughness.

引用

页码：0311011 / 0311018

页数：8

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