Accuracy of geometry data exchange using STEP AP242

Bijnens, John; Kellens, Karel; Cheshire, David

doi:10.1016/j.procir.2018.09.048

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Previous studies used AP203 and AP214 for G code generation, but both types of Application Protocol (AP) contain their respective weaknesses. Additionally, AP203 and AP214 are STL files, according to Yang et al, [15], although STL files are widely used in the field of additive manufacturing, however, these STL file does not contain geometrical and surface topology information, making these STL files unsuitable for extracting feature information quickly. These gaps can be overcome by using the STEP AP242 file model used to extract surface features and tolerance information.…”

Section: Results Of Cases Studymentioning

confidence: 99%

Advancements in CNC Machining: Rectangular Boss Feature Validation and Toolpath Precision using STEP AP242 and B-Rep Data Structure

Siti Nurul Akmal Yusof,

Raja Fatin Najiha Raja Anuar,

Saiful Bahri Mohamed

et al. 2024

ARAM

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In the context of a CNC machining application, this study proposes an alternate approach for creating toolpaths designed explicitly for machining rectangular bosses utilizing the STEP AP242 file format as a data source. The suggested methodology ensures data accuracy and integrity maintenance by extracting exact geometric information from digital models using Geometric Data Extraction (GDE) tools. The value of the Cartesian multi-point decimal point in the data structure and variations in the reference number of the Cartesian point every time a user accesses and converts to a STEP (AP203) file are two drawbacks of AP203 when compared to the widely utilized AP203 in prior technique studies. This method makes it possible to create G-code efficiently, which is necessary for managing computer numerical control (CNC) machines, by utilizing the power of STEP AP242 and GDE. The process entails finding and separating the rectangular island milling features in the STEP AP242 files, taking out critical geometric characteristics, and creating toolpaths that are optimal for CNC machining. Through this approach, the final G-code instructions are guaranteed to be precisely calibrated to consider every island feature's distinct quality while preserving overall machining efficiency. Several real-world case studies and valuable applications are investigated to confirm the efficacy of the suggested method. The results show significant increases in productivity, decreased waste material, and improved precision of CNC machining, all of which contribute to a more effective and economical production process.

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Section: Results Of Cases Studymentioning

confidence: 99%

Advancements in CNC Machining: Rectangular Boss Feature Validation and Toolpath Precision using STEP AP242 and B-Rep Data Structure

Siti Nurul Akmal Yusof,

Raja Fatin Najiha Raja Anuar,

Saiful Bahri Mohamed

et al. 2024

ARAM

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“…However, this expanded with the advent of Siemens JT format and the Adobe 3D pdf format which allowed data sharing without the original CAD modelling package. Data exchange has been greatly improved with development of the vendor neutral STEP AP242 [18] format which allows the communication of the full semantic MBD specification within a STEP solid model, although conversion between STEP242 and proprietary data types has been found to vary [19]. A study of the global aerospace sector identified the majority of benefits from MBD will be found within the manufacturing and inspection [7].…”

Section: Overview Of Tps Literaturementioning

confidence: 99%

Model Based Definition: Finally, the Engineering Drawing Killer?

Garland¹,

Wade²,

Glithro³

et al. 2019

DS 95: Proceedings of the 21st International Conference on Engineering and Product Design Education (E&PDE 2019), Universit

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Engineering drawing has stood as the universal method of translating design intent since the first standard was formalised in 1927 as BS308. Further development of national and international standards has been informed by advances in CADCAM technology and the need for transfer of complex yet unambiguous definition between organisations. The emergence of model-based definition (MBD) has driven a new workflow where engineering drawing is no longer required. Instead, the dataset includes semantic, machine readable, tolerancing of surfaces and features for integration into manufacturing and metrology procedures. Despite the advantages of MBD, it has been largely ignored in UK higher education. However, MBD is the ideal method for teaching and learning geometrical tolerancing since it ignores the theoretically exact dimensions and housekeeping, concentrating on the functional limits. Further, it utilises the 3D workspace that students are increasingly familiar with.

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