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학술대회자료
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한국경영과학회 한국경영과학회 학술대회논문집 한국경영과학회/대한산업공학회 2003 춘계공동학술대회
발행연도
2003.5
수록면
209 - 217 (9page)

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ISO 14649 (data model for STEP-NC) is a new interface scheme or language for CAD-CAM-CNC chain under established by ISO TC184 SC1. Up to this point, the new language is mainly made for milling and turning, and other processes such as EDM will be completed in the future. Upon completion, it will be used as the international standard language for e-manufacturing paradigm by replacing the old machine-level language, so called M&G code used since 1950's. With the rich information contents included in the new language, various intelligent functions can be made by the CNC as the CNC knows what-to-make and how-to-make. In particular, On-Machine Inspection required for quality assurance in the machine level, can be done based on the information of featurebased tolerance graph. Previously, On-Machine Inspection has been investigated mainly for milling operation, and only a few researches were made for turning operation without addressing the data model. In this thesis, we present a feature-based on-machine inspection process by the 4 Tasks: 1) proposing a new schema for STEP-NC data model, 2) converting the conventional tolerance scheme into that of STEP-NC, 3) modifying the tolerance graph such that the tolerance can be effectively measured by the touch probe on the machine, and 4) generating collision-free tool path for actual measurement.
Task 1 is required for the incorporation of the presented method
in the ISO 14649, whose current version does not much include the
detailed schema for tolerance. Based on the presented schema, the
tolerance represented in the conventional drafting can be changed
to that of STEP-NC (Task 2). A special emphasis was given to Task 3 to make the represented tolerance accurately measurable by the touch probe on the machine even if the part setup is changed.
Finally, Task 4 is converting the result of Task 3 into the motion of touch probe. The developed schema and algorithms were illustrated by several examples including that of ISO 14649 Part 12.

목차

Abstract

1. 서 론

2. FBOMM Tasks and Processes

3. Turning_Feature_Tolerance - New schema for STEP-NC data model

4. Tolerance Feature Analysis

5. Tolerance Datum Analysis process

6. Inspection Path Generation

7. Illustrative Example

8. 결 론

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