US 2014/0200709 A1Published application

Machining Condition Estimating Apparatus and Machining Condition Estimating Method

AssigneeHitachi Metals, Ltd.

InventorsKoji UTSUMI, Shigeyoshi FUJIHARA, Tadashi KITAMURA, Kenichi INOUE, Shinji KAYAMA

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Abstract

A machining condition estimating apparatus, for estimating a long life-time machining condition, by suppressing boundary wears, from among plural numbers of choices of machining conditions, without building up database, comprise: a means for defining an analysis model presenting shapes of a tool and a cutting material, to be a target of analysis, and various kinds of machining condition parameters relating to relative positions between the tool and the cutting material; a means for setting up an initial value for use of analysis and change volume of the machining condition parameter as analysis parameters; a means for conducting geometric calculation of contact length, over which the tool and the cutting material of the model contact with, for each analysis parameter; a means for producing a distribution waveform, plotting the contact length “Lci” for each position “γi” of a point on each blade edge calculated, on “γi”−“Lci” coordinates, thereby to calculate a ratio of movement length of a boundary portion with respect to the maximum contact length (boundary movement rate) and a ratio of width, over which a tool blade contacts with the cutting material (contact rate); a means for searching the analysis parameter, with which the boundary movement rate or the contact rate comes to maximum, respectively; and a means for outputting a long life-time machining condition selected from the analysis parameters searched.

Claims10

Dependent claims

A machining condition estimating apparatus, for estimating a machining condition to suppress a wear volume of a tool when conducting cutting work in a work machine, comprising:

an analysis model data defining portion, which is configured to define an analysis model presenting shapes of a tool and a cutting material, to be a target of analysis, and various kinds of machining condition parameters relating to relative positions between the tool and the cutting material;
an analysis parameter setup portion, which is configured to set up an initial value for use of analysis and change volume of the machining condition parameter as analysis parameters;
a tool/cutting material contact geometric calculation portion, which is configured to calculate coordinates “G”, at which the cool and the cutting tool of the analysis mode contact, and center coordinates P of the cutting material, for each combination of the analysis parameters set up, and to calculate a position “γi” of a point “i” and contact length “Lci”, for each point “i” on a blade edge divided into “N” pieces;
a contact condition calculation portion, which is configured to calculate a boundary movement rate “Lr” indicative of a ratio between a contact length “Lb” of a region where the contact length “Lci” changes gradually in accordance with change of “γi”, and a maximum contact length “Lt” at a point “i”, at which the contact length is longest, and a contact angle “γr” indicative of a ratio between an angle presenting maximum width, over which a tool blade contacts with the cutting material, and a predetermined blade angle, by producing a distribution waveform with plotting the contact length “Lci” for the each point “i” calculated on a chart, presenting “γi” on a horizontal axis and “Lci” on a vertical axis, thereby to memorize in a memory portion;
a machining condition searching portion, which is configured to search a machining condition presented by the analysis parameter, with which the boundary movement rate “Lr” reaches come to be maximal, or a machining condition presented by the analysis parameter, with which the contact angle “γr” come to be maximal, from among the boundary movement rates “Lr” or the contact angles “γr”, which are calculated for all of combinations of analysis parameters, and
an estimation result output portion, which is configured to output the machining condition searched.

3 more elements

A machining condition estimating method, for estimating a machining condition to suppress a wear volume of a tool when conducting cutting work in a work machine, comprising the following steps of:

an analysis model data defining step for defining an analysis model presenting shapes of a tool and a cutting material, to be a target of analysis, and various kinds of machining condition parameters relating to relative positions between the tool and the cutting material;
an analysis parameter setup step for setting up an initial value for use of analysis and change volume of the machining condition parameter as analysis parameters;
a tool/cutting material contact geometric calculating step for calculating coordinates “G”, at which the cool and the cutting tool of the analysis mode contact, and center coordinates P of the cutting material, for each combination of the analysis parameters set up, and to calculate a position “γi” of a point “i” and contact length “Lci”, for each point “i” on a blade edge divided into “N” pieces;
a contact condition calculating step for calculating a boundary movement rate “Lr” indicative of a ratio between a contact length “Lb” of a region where the contact length “Lci” changes gradually in accordance with change of “γi”, and a maximum contact length “Lt” at a point “i”, at which the contact length is longest, and a contact angle “γr” indicative of a ratio between an angle presenting maximum width, over which a tool blade contacts with the cutting material, and a predetermined blade angle, by producing a distribution waveform with plotting the contact length “Lci” for the each point “i” calculated on a chart, presenting “γi” on a horizontal axis and “Lci” on a vertical axis, thereby to memorize in a memory portion;
a machining condition searching step for searching a machining condition presented by the analysis parameter, with which the boundary movement rate “Lr” reaches come to be maximal, or a machining condition presented by the analysis parameter, with which the contact angle “γr” come to be maximal, from among the boundary movement rates “Lr” or the contact angles “γr”, which are calculated for all of combinations of analysis parameters;
and
an estimation result output step for outputting the machining condition searched.

4 more elements

Dependencies are inferred from the claim text.