Appeal No. 1996-4124
Application No. 08/307,088
compared to a stored nominal value. On page 3 of the
specification, Appellant identifies that the nominal value is
determined by storing all actual values during the machining
of a workpiece free of flaws. Appellant identifies on page 9
of the specification that the feed rate of the machining tool
is controlled in accordance with the comparison of the
measured force, such that the feed rate can be reduced before
a flaw occurs. On page 7 of the specification, Appellant
identifies that the workpiece is a gear box gear wheel. On
page 4 of the specification, the Appellant states that the
machining is performed by a grinding disc which can
simultaneously grind two tooth flanks.
Independent claim 28 is representative of the invention:
28. A method of preventing machining flaws
in a tooth wheel, which are caused by a grinding
disc which simultaneously grinds two adjacent
tooth flanks of adjacent teeth of the tooth
wheel, when the grinding disc is applied against
the two adjacent tooth flanks with excessive
force during grinding, said method comprising
the steps of:
determining nominal grinding forces applied
by the grinding disc to a test tooth wheel
produced without any machining flaws and storing
nominal force values;
continuously measuring a grinding
force which is applied by the grinding disc
to the tooth wheel in two axes extending at
4
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