Method for performing delta volume decomposition and process planning in a turning step-nc system
AssigneePostech Foundation
InventorsSuk-Hwan Suh, Sang-Uk Cheon, Byeong-Eon Lee
Life of this patent
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Abstract
A profile of a finished part is recognized based on an inputted CAD data. A delta volume for the finished part is decomposed based on information on cutting tools and the profile. Thereafter, a dependency graph representing precedence relation between the decomposed delta volumes is generated. And then, a process sequence graph representing process plans is generated based on the dependency graph. The delta volume decomposition is performed based on information on cutting tools and a machine configuration as well as part geometry, such that the decomposed delta volumes are suitable to be cut away from a raw stock by the cutting tools.
Claims13
A method for performing delta volume decomposition and process planning in a turning STEP-NC system, comprising the steps of:
- (a) based on a CAD data file including geometry information on a raw stock and a finished part, recognizing a profile of the finished part;
- (b) setting a machine configuration of a turning machine based on the recognized profile;
- (c) splitting the profile based on the machine configuration;
- (d) decomposing a delta volume corresponding to each of the split profiles;
- (e) generating a dependency graph based on the decomposed delta volumes, wherein the dependency graph represents operational precedence relations between the decomposed delta volumes;
- (f) generating a PSG (process sequence graph) representing a process plan based on the dependency graph;
- (g) editing the decomposed delta volumes and/or the PSG;
- and
- (h) generating a part program based on the PSG.
A method for decomposing a delta volume for use in a turning STEP-NC system, comprising the steps of:
- (a) splitting a profile of a finished part into N profiles based on a setup and/or a machine configuration, wherein N is a positive integer;
- (b) recognizing an inherent delta volume based on information on each of the split profiles;
- (c) updating an input profile by calculating a union of the inherent delta volume and the profile of the finished part;
- (d) based on the input profile, determining a reference line such that a minimum number of monotone chains are obtained based on the reference line;
- (e) determining a maximum monotone chain by connecting the monotone chains;
- and
- (f) selecting a first turning tool and recognizing a primary delta volume and/or an uncut delta volume based on information on the first turning tool and the maximum monotone chain.
Dependencies are inferred from the claim text.