Zhoumingju Jiang , Ang Liu (2) , Dawen Zhang , Xiwei Xu , Yun Dai
{"title":"Customization and personalization of large language models for engineering design","authors":"Zhoumingju Jiang , Ang Liu (2) , Dawen Zhang , Xiwei Xu , Yun Dai","doi":"10.1016/j.cirp.2025.03.001","DOIUrl":"10.1016/j.cirp.2025.03.001","url":null,"abstract":"<div><div>Large language models (LLMs) are increasingly used in design and manufacturing, yet directly employing general-purpose LLMs for conceptual design often leads to unmanufacturable concepts. This paper aims to adapt general-purpose LLMs for design-specific tasks. A new framework is presented to customize a general-purpose LLM into a design-specific model based on design-relevant data and Retrieval-Augmented Generation (RAG). Another complementary framework is presented to personalize the design-specific LLM by integrating design reasoning with prompting techniques. A design experiment, using patent documents as the design-relevant data, demonstrates that customization and personalization can improve LLM effectiveness in conceptual design, especially by enhancing concept feasibility.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 191-195"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A novel approach to milling cutter temperature analysis with cutting fluid consideration","authors":"Thomas Bergs (2) , Hui Liu","doi":"10.1016/j.cirp.2025.04.020","DOIUrl":"10.1016/j.cirp.2025.04.020","url":null,"abstract":"<div><div>This study investigates heat transfer to the tool and the cooling efficiency of flood cooling under various cutting conditions using experiments and simulations. An experimental apparatus was developed to measure tool temperature during side milling with cutting fluid. Furthermore, a computationally efficient multiscale simulation method, combining engagement simulation and orthogonal cutting simulation, is introduced to predict process forces and heat transfer to the tool. The findings indicate that accurate orthogonal cutting models enable the multiscale simulation to predict cutting forces and heat transfer. The higher computation speed compared to chip-forming simulations makes the proposed method well-suited for industrial applications.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 119-122"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ni Chen, Huiwen Chen, Bo Yan, Zhiyuan Mao, Ahsan Imran, Guolong Zhao, Ning He
{"title":"Improving cutting performance of nickel-based alloy by graphene modified diamond tools","authors":"Ni Chen, Huiwen Chen, Bo Yan, Zhiyuan Mao, Ahsan Imran, Guolong Zhao, Ning He","doi":"10.1016/j.cirp.2025.04.034","DOIUrl":"10.1016/j.cirp.2025.04.034","url":null,"abstract":"<div><div>Inconel 718 is widely used in aerospace due to thermomechanical properties, but machining causes rapid tool wear. This study develops a covalent diamond-nanographite-graphene (CDGG) tool using nanosecond lasers and flywheel cleavage to convert sp³ diamond into sp² graphene, welds it onto a carbide handle, and sharpens cutting edges. The friction-wear tests and cutting experiments show that CDGG tool’s apparent friction coefficient is 49–59 % lower than diamond tool, rake face wear depth is 55–65 % lower than diamond tool, 75–85 % lower than ceramic tool. Graphene forms self-lubricating layers, minimizes wear, and enhances Inconel 718 machining efficiency and tool durability.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 145-149"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kristian Martinsen (3) , Thawin Hart-Rawung , Jon Holmestad , Johan Andreas Stendal , Sverre Gulbrandsen-Dahl , Ole Runar Myhr
{"title":"Hybrid modelling predicting forming behavior with variations in AlMgSi1 alloys","authors":"Kristian Martinsen (3) , Thawin Hart-Rawung , Jon Holmestad , Johan Andreas Stendal , Sverre Gulbrandsen-Dahl , Ole Runar Myhr","doi":"10.1016/j.cirp.2025.03.005","DOIUrl":"10.1016/j.cirp.2025.03.005","url":null,"abstract":"<div><div>This paper shows how hybrid modeling combining a physics-based Precipitation Model and a data-driven Gaussian Process Regression model can be used to predict flow stress curves of different variants of AlMgSi1 alloys. The approach can be a step towards a methodology to manage higher variability in input material, such as remelted contaminated post-consumer aluminum scrap. Data from laboratory compression tests of six different compositional variations of AlMgSi1 with different contents of Si, Cu, and Mg was used. The proposed hybrid model aligns well with experimental results both within the training data range and inputs beyond the training range.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 369-373"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vision-based robotic disassembly of aircraft engines with YOLO-SAM: a novel method for task orientation estimation","authors":"Angelo Moroncelli , Sylvain Populus , Armand Rossi , Emanuele Carpanzano (1) , Loris Roveda","doi":"10.1016/j.cirp.2025.04.063","DOIUrl":"10.1016/j.cirp.2025.04.063","url":null,"abstract":"<div><div>The growing demand for sustainable end-of-life management in aerospace has increased the need for robotic disassembly. This paper presents a novel pipeline for aircraft engine disassembly, operating in automatic and semi-automatic modes with state-of-the-art vision-based techniques. The key contributions are: (1) a method combining the Segment Anything Model (SAM) with YOLO for detecting removable bolts, independent of engine model and adaptable to various worn bolt types using vision-only perception; and (2) a SAM-based approach for estimating task orientation, ensuring precise tool alignment. Validated in simulations and real-world tests, the pipeline demonstrates high accuracy and adaptability for solutions in aerospace manufacturing.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 55-59"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Printability assessment and modelling for process optimization of 3D Aerosol Jet® printed high aspect ratio microstructures","authors":"Elisabetta Ceretti (2) , Mohit Sharma , Eleonora Ferraris (2) , Paola Serena Ginestra , Miriam Seiti","doi":"10.1016/j.cirp.2025.04.062","DOIUrl":"10.1016/j.cirp.2025.04.062","url":null,"abstract":"<div><div>The printability assessment of high-aspect-ratio structures in additive manufacturing is critical for ensuring dimensional accuracy and functional properties. This study proposes a method to evaluate print quality by quantifying metrics, including accuracy, shape fidelity and line edge quality, using advanced imaging and predictive analysis. A printability index is developed to relate these metrics to process parameters, here applied to Aerosol Jet® Printing. By validating structures’ quality and optimizing parameters, the index effectively improves process stability, reduces defects, and enhances structural precision. This approach provides a robust tool for process optimization, ensuring consistent results in complex high-aspect-ratio designs, further advancing printing scalability and reproducibility.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 287-291"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Removal mechanism of diamond/Al composites in blasting erosion arc machining","authors":"Lin Gu (2) , Lijie Jiang , Kelin Li , Xiaoka Wang","doi":"10.1016/j.cirp.2025.04.019","DOIUrl":"10.1016/j.cirp.2025.04.019","url":null,"abstract":"<div><div>Diamond/Al composites are promising materials for thermal management, but the presence of diamond particles makes them extremely difficult-to-cut. To address this challenge, blasting erosion arc machining (BEAM) is suggested for its high efficiency. The removal mechanism, particularly the influence of diamond particles, was first studied through magnetohydrodynamics and heat transfer simulations. Further analysis revealed how differences in the thermal properties between the reinforcements and the matrix result in distinct solid-liquid-gas phase transitions. The debris morphology and composition were analyzed to further clarify the removal mechanism. Experiments confirmed the high-efficiency machining performance of BEAM in diamond/Al composites.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 245-249"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Florian Morczinek , Martin Dix (3) , Rafael Wertheim (1)
{"title":"Characterization of the high-pressure suspension jet for efficient cutting and abrasive circularity","authors":"Florian Morczinek , Martin Dix (3) , Rafael Wertheim (1)","doi":"10.1016/j.cirp.2025.04.067","DOIUrl":"10.1016/j.cirp.2025.04.067","url":null,"abstract":"<div><div>To optimize the workpiece removal process and maximize the fraction of reusable abrasive particles, it is necessary to ascertain the characteristics of the high-pressure suspension jet process, including the kinetic energy of the particles in the jet. In this study, the particle velocity and the change in their size were measured and analyzed. It was found that due to breakage the average particle size decreases by up to 35 % during the acceleration process in the nozzle. The results showed that the particle size has insignificant influence on particle velocity, while the kinetic energy of an average particle decreased by up to 72 %.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 333-337"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of layer thickness in laser powder bed fusion of HWTS 50 hot work tool steel","authors":"Sasan Dadbakhsh , Sinesh Vadakkekkara , Ashik Mansingh Anila , Lorena Emanuelli , Massimo Pellizzari , Faraz Deirmina","doi":"10.1016/j.cirp.2025.03.004","DOIUrl":"10.1016/j.cirp.2025.03.004","url":null,"abstract":"<div><div>This work optimises and analyses the processing of a new lean tool steel (Osprey® HWTS 50), using laser powder bed fusion (PBF-LB) at 80 °C preheating and different layer thicknesses (20 µm vs. 40 µm). Full density is reached via a higher volumetric energy density (VED) for the lower layer thickness. After optimising contours, reducing surface roughness and ensuring no microcrack formation, the tensile properties are rather comparable in both cases (UTS ∼ 1500 MPa, elongation ∼ 10–12%). However, yield strength, hardness and residual stresses are slightly higher for the lower layer thickness. The geometrical freedom for intricate features is nevertheless comparable.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 293-296"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carlos M.A. Silva , João P.M. Pragana , Rui F.V. Sampaio , Ivo M.F. Bragança , Paulo A.F. Martins (1)
{"title":"Advanced double-flush riveting for multistage forming tools","authors":"Carlos M.A. Silva , João P.M. Pragana , Rui F.V. Sampaio , Ivo M.F. Bragança , Paulo A.F. Martins (1)","doi":"10.1016/j.cirp.2025.03.040","DOIUrl":"10.1016/j.cirp.2025.03.040","url":null,"abstract":"<div><div>This paper presents a novel double-flush riveting process for creating lap joints in sheet metal parts. The process involves punching, forging, and shaving to produce countersunk holes with precise geometry, followed by compression of cylindrical rivets into the holes of two overlapped sheet parts to create form-closed mechanical interlocks. Experimental and numerical analyses examine the influence of the primary process parameters on interlock quality and required forming and destructive forces. The investigation is a step forward in joining technology by offering a simple alternative to welding, bonding, and mechanical joining, with seamless integration into multistage forming tools.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 399-403"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}