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**Topic under **Precision measuring

**Source:** www.aspe.net

**File size:** **145.31 KB**

**File type:** **pdf**

**Last download on:**
Thu Apr 12, 2018 02:53:55 AM

__Short Desciption__:

PRECISION MEASUREMENT OF SMALL DIAMETER HOLE IN A METALLIC OBJECT ... University of Science and Technology, Hong Kong INTRODUCTION ... with different probe Z level. 1.0 mm Z Axis Actuator L ...

__Summary__:

There are a number of industrial applications
such as in the aerospace and disk drive
industries, which require precision measurement
of small diameter holes with high aspect ratio.
Some of the standard measurement systems,
such as optical techniques, while capable of
characterizing holes on the surface of the work
piece, would face difficulties in characterizing
the interior of a hole especially if the latter is a
non-through hole. A novel vibroscanning method
has demonstrated the possibility measurement
of a 125um micro hole with level of precision
better than 0.5um [1,2]. However, this technique
requires a special probe, which is not widely
available. Because of this, CMM using
mechanical probe is still commonly used in
industry. However, using CMM for small hole
measurement has certain drawbacks. It is
expensive, time consuming, and is a contact
measuring technique. Also it is difficult to use
CMM for the measurement of very small
diameter holes. Therefore it is desirable to
develop an alternative, more widely available
cost effective precision approach.

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"PRECISION MEASUREMENT OF SMALL DIAMETER HOLE IN A METALLIC OBJECT"

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