US 4,994,980 A · Automatic machining scheduling method based on an expert system

Abstract

An automatic machining scheduling method based on an expert system is provided, which can optimize and facilitate the assignment of processes in a large-scale production system to individual machine tools, based on expert experience accumulated as a database, thereby enabling effective operation of the production system. When requested quantities for respective machine models to be produced are input (S1), the machining time of each jig involved in a respective machine model and the usage form of each jig are read from the related files, and the former is multiplied by the latter, to obtain the total machining time for each of the machine tools (S2, S3). A day or week production matrix is created based on the ratio of the calculated time of each of the machine tools to the operating time thereof per day (S4-S7). It is determined whether a machining schedule including a pattern identical to the machining pattern of the matrix is registered (S10, S11). If the machining schedule is registered in the file, the registered schedule is used (S12-S15).

Claims5

Dependent claims

An automatic machining scheduling method based on an expert system, comprising the steps of:

(a) obtaining a total machining time required for each of a plurality of machine tools to machine various component parts of machines to be produced, based on requested quantities of respective machine models;
(b) comparing the required total machining time of each of the machine tools, obtained in said step (a), with a predetermined operating time for the corresponding machine tool per a first predetermined period, and determining whether the first predetermined period or a second predetermined period longer than the first predetermined period should be used as a unit time for creating a machining schedule;
(c) creating a production matrix in accordance with the unit time determined in said step (b) and based on the requested quantities of respective machine models;
(d) retrieving a machining pattern coinciding with the production matrix created in said step (c), from among various machining patterns registered previously;
and
(e) retrieving a machining schedule corresponding to the machining pattern retrieved in said step (d), from among various machining schedules registered previously.

3 more elements

Dependencies are inferred from the claim text.

Automatic machining scheduling method based on an expert system

Life of this patent

Automatic machining scheduling method based on an expert system

Life of this patent

Abstract

Claims5