Abstract:
The middle-convex and varying ellipse piston is the key
component of an internal-combustion engine. In general, the
piston is machined by non-circular section CNC lathe, but the
measuring of piston profile is manipulated by off-line. Because
the off-line measuring reference is different from the machining
reference, the measurement result is diverse from the actual.
Measurement result is diverse from the actual dimension. A new
method to measure the middle-convex and varying ellipse piston
profile, which is known as on-line measuring, is presented. By
using this kind of method, the high measurement accuracy can be
gained, as well as meeting the production requirement.
Key words: Middle-convex and
varying
ellipse piston On-line measure Non-circular section
*
This project
is support by National Natural Science Foundation of China (No.59675066).
Manuscript received on December 26, 2000; revised manuscript April
12, 2001
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