Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
1997-05-28
2001-05-29
De Cady, Albert (Department: 2784)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C700S044000, C700S105000
Reexamination Certificate
active
06240330
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a novel method for optimizing a manufacturing production of a workpiece.
INTRODUCTION TO THE INVENTION
An indicia of current manufacturing practices is that, if a process results in a partial product which is outside its ideal values for a parameter list corresponding to a completed workpiece, the partial product is either sent back to be reworked, or is scrapped. This practice, however, may result in unacceptable waste.
SUMMARY OF THE INVENTION
Our work centers on a critique of the capabilities and viability of the foregoing representative current manufacturing practices, to an end of disclosing novel methodology which can minimize the waste and inefficiency of the type immanent in the current practices.
A centerpiece of our novel methodology comprises corrective feedforward actions by subsequent (with respect to identification of in-process workpiece status) manufacturing processes.
In overview, the novel method is suitable for optimizing manufacturing production of a workpiece, and
specifying ideal values for a parameter list corresponding to a completed workpiece;
subjecting the workpiece to an initial manufacturing process to an end of producing the completed workpiece in satisfaction of the ideal values;
monitoring the manufacturing process for ascertaining the status of the in-process workpiece with respect to the ideal values; and
providing feedforward corrective action to the manufacturing process conditioned by the status of the in-process workpiece.
An important advantage of the novel method as defined is that the approach is general and is capable of correcting the effects of out-of-specs manufacturing process conditions, including the salvaging of partial product, thereby obviating a need for rework or scrap.
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patent: 5229948 (1993-07-01), Wei et al.
patent: 5379237 (1995-01-01), Morgan et al.
patent: 5457625 (1995-10-01), Lim et al.
patent: 5608660 (1997-03-01), Morgan et al.
patent: 2-71962 (1990-03-01), None
patent: 4-44208 (1992-02-01), None
Kurtzberg Jerome M.
Levanoni Menachem
Cady Albert De
Chase Shelly A
International Business Machines - Corporation
Kaufman, Esq. Stephen C.
McGinn & Gibb, P.C.
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