Method of determining unacceptable deviations from process param

Details Method of determining unacceptable deviations from process param Method of determining unacceptable deviations from process param

Filed on

1992-09-09

Date issued

1994-06-28

Examiner

Bradley, Paula A.

Patent Class

Metal founding

SubClass

Process

SubSubClass

With measuring, testing, inspecting, or condition determination

Other Related Categories

B22D 1720

Type

Patent

Status

active

Patent number

053238370

Description

ABSTRACT:
A computer implemented method of determining unacceptable deviations from process parameters associated with manufactured parts, for use with die-casting machines. The method includes entering in a data base empirically determined parameter values for the manufacture of good parts, constantly acquiring during a preproduction phase actual manufacturing parameter values as a set of parameters for each of a predetermined number of manufactured parts, testing the quality of the predetermined number of parts produced during the preproduction phase, classifying the acquired sets of parameters for each preproduction phase manufactured part as good or reject based on the testing, and storing the classified acquired sets of parameters for each preproduction phase manufactured part. Reject parts arising in a subsequent production phase are determined without quality inspection thereof by constantly acquiring during the production phase actual manufacturing parameter values as a set of parameters for each production phase manufactured part, and comparing acquired sets of parameters for each production phase manufactured part with the classified acquired sets of parameters for each preproduction phase manufactured part.

REFERENCES:
patent: 4094055 (1978-06-01), Morimoto
patent: 4335778 (1982-06-01), Motomura et al.
patent: 4469164 (1984-09-01), Ishikawa et al.
patent: 4844146 (1989-07-01), Kikuchi
patent: 4874032 (1989-10-01), Hatamura
patent: 4884621 (1989-12-01), Ban et al.
patent: 4954063 (1990-09-01), Iwamoto

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