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Ch74-I044963.fm Page 365 Tuesday, August 1, 2006 9:45 PM
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STUDY ON-MACHINE WORK PIECE MEASUREMENT ON 5-AXIS
CONTROLLED MACHINING CENTER
Shunsuke Nakamura 1 Yukitoshi Ihara 2
'Major in Mechanical Engineering, Osaka Institute of Technology Graduate School,
5-16-1 Omiya, Asahi-ku 535-8585 Osaka, JAPAN
"Department of Mechanical Engineering, Osaka Institute of Technology,
5-16-1 Omiya, Asahi-ku 535-8585 Osaka, JAPAN

ABSTRACT

The study presents an application of machined work piece measurement system with the laser
displacement sensor and Cs axis control on five-axis controlled machining center. Generally,
post-process measurement of multi-face machined product is carried on a coordinate measuring
machine (CMM), however, this way cannot achieve either high productivity because of loading and
unloading of work piece nor low cost with expensive CMM. To solve this problem, On-machine work
piece measurement with the laser displacement sensor is proposed in this paper. The main objective of
this research is to establish work piece measurement system on five-axis controlled machining center
and to develop measurement software for On-machine work piece measurement, which collaborate
commercial CAD/CAD software.

KEY WORDS
On-machine measurement, five-axis controlled machining center, work piece measurement, mold
machining
INTRODUCTION

Nowadays the style design becomes increasingly important for consumer electronics and consumer
goods industries. Thus die/mold shape becomes too complicate to be machined for conventional 3-axis
machining center with high speed and high accuracy. In addition, even for industrial parts such as
automotive parts or aircraft parts, not only complex shape which 5-face machining is needed but also
high dimensional accuracy for expanded function and capacity are required. On this ground, demand
of 5-axis machining center increases rapidly, which enables to machine complex shape parts by
obtaining cutting tools' multiple degree of freedom. Generally, one axis measurement by using caliper
or micrometer is not suitable for products that are machined by 5-axis machining center because it is
too complicate to be measured all form and dimensions. Thus, in real manufacturing process,
machined products are loaded to expensive measurement-only machine such as CMM. What is more, a
large amount of time is needed for complex shape measurement even by measurement-only machine.
In this reason, total productivity is not so high although 5-axis machining center is introduced for
efficient machining. Thus, manufacturer who use 5-axis machining center is eager to get quicker and