Chris V. Nielsen (2) , Paulo A.F. Martins (1) , Niels Bay (1)
{"title":"Slipline solution to asperity deformation under combined high normal pressure and subsurface deformation","authors":"Chris V. Nielsen (2) , Paulo A.F. Martins (1) , Niels Bay (1)","doi":"10.1016/j.cirp.2025.03.030","DOIUrl":"10.1016/j.cirp.2025.03.030","url":null,"abstract":"<div><div>A new set of slipline fields, along with a corresponding calculation procedure, offers an analytical solution to the flattening of asperities under high normal pressure and subsurface deformation. This new solution integrates existing slipline fields for asperity flattening at high normal pressures with those related to indentation and provides a statically admissible transition to uniform subsurface deformation under plane strain conditions. The calculation procedure effectively manages the transition from one slipline field to another, accounting for increments in both the real contact area ratio and the longitudinal strain associated with subsurface deformation. The new solution is validated against numerical simulations.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 375-379"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611897","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}
Ludger Overmeyer (2) , Marvin Raupert , Matthias Pusch , Tjorben Griemsmann , André Katterfeld , Christoph Lotz
{"title":"Laser powder directed energy deposition and substrate-free single layer powder bed fusion under micro- and lunar gravity conditions","authors":"Ludger Overmeyer (2) , Marvin Raupert , Matthias Pusch , Tjorben Griemsmann , André Katterfeld , Christoph Lotz","doi":"10.1016/j.cirp.2025.03.031","DOIUrl":"10.1016/j.cirp.2025.03.031","url":null,"abstract":"<div><div>In-Space Manufacturing (ISM) needs material-efficient processes or the usage of locally available resources. This article presents two successfully applied approaches: Laser Powder Directed Energy Deposition (LP-DED) realized in microgravity on Earth for the first time using Ti-6Al-4V and substrate-free single layer powder bed fusion (PBF) under lunar gravity using LX-I50 regolith simulant. The Einstein-Elevator, a third-generation drop tower, is used to simulate the environmental conditions of space regarding gravity. The research results confirm the feasibility and open up new perspectives for space research, particularly concerning resource-efficient manufacturing technologies in future missions.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 297-301"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611902","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}
Hitomi Yamaguchi (1) , Fukuo Hashimoto (1) , Eraldo da Silva (2) , Chi Fai Cheung (1)
{"title":"Advances in magnetic field-assisted finishing","authors":"Hitomi Yamaguchi (1) , Fukuo Hashimoto (1) , Eraldo da Silva (2) , Chi Fai Cheung (1)","doi":"10.1016/j.cirp.2025.04.097","DOIUrl":"10.1016/j.cirp.2025.04.097","url":null,"abstract":"<div><div>Magnetic Field-Assisted Finishing (MAF) is a process that removes material by means of magnetic-abrasive tools suspended in a magnetic field. The unique behavior of magnetic-abrasive tools has given rise to various derivatives. This paper reviews the progression of MAF over the past century starting with a historical review, MAF fundamentals, and variations of MAF (e.g., polishing, edge finishing, and mass finishing). The status of MAF process modeling and a new approach to process modeling are introduced. The advantages and limitations of MAF are shown by discussing the material-removal characteristics. Lastly, potential applications and future directions for MAF research are suggested.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 2","pages":"Pages 921-944"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663234","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":"Future-Proof Production Scheduling and Control","authors":"Marcello Urgo (2) , Gisela Lanza (1) , Rok Vrabič (2) , Dávid Gyulai","doi":"10.1016/j.cirp.2025.04.095","DOIUrl":"10.1016/j.cirp.2025.04.095","url":null,"abstract":"<div><div>Traditional production scheduling and control are increasingly inadequate in light of the rapid evolution of manufacturing technology, the growing impact of unforeseen disruptions, and the generally increasing complexity of production. A framework for future-proof production scheduling and control is introduced to close this gap, providing a comprehensive overview of future requirements and the necessary technologies and approaches. Robust decision criteria are derived, explained and filled with major recent advances in production scheduling and control, digital twins, artificial intelligence, and knowledge formalisation. Emerging trends are discussed, and an outlook for future research and decision-making is derived.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 2","pages":"Pages 971-991"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663236","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}
Seulah Park , Sukkyung Kang , Dong Geun Kim , Sanha Kim (2)
{"title":"Mitigation of Cu dishing in chemical mechanical polishing using micro-structured pads","authors":"Seulah Park , Sukkyung Kang , Dong Geun Kim , Sanha Kim (2)","doi":"10.1016/j.cirp.2025.03.016","DOIUrl":"10.1016/j.cirp.2025.03.016","url":null,"abstract":"<div><div>Dishing is a critical defect in chemical mechanical polishing (CMP) that affects the mechanical reliability and electrical performance of hybrid bonding interfaces in semiconductor packaging. This study explores that micro-structured pad with well-defined asperity design can minimize CMP dishing. A theoretical model identifies asperity area, height variation, and modulus as key factors influencing contact pressure and dishing. Experimental results validate the model, demonstrating a 69% reduction in dishing with a soft cylindrical pad compared to a commercial pad. This improvement is attributed to increased real contact area and uniform pressure distribution due to minimized height variation and material compliance.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 465-469"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611559","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}
Song Yuan , Chi Fai Cheung (1) , Alborz Shokrani (2) , Zejin Zhan , Chunjin Wang
{"title":"Atomic-level flat polishing of polycrystalline diamond by combining plasma modification and chemical mechanical polishing","authors":"Song Yuan , Chi Fai Cheung (1) , Alborz Shokrani (2) , Zejin Zhan , Chunjin Wang","doi":"10.1016/j.cirp.2025.03.024","DOIUrl":"10.1016/j.cirp.2025.03.024","url":null,"abstract":"<div><div>This paper presents an atomic-level flat polishing method based on hydroxyl (•OH) oxidation combining plasma modification and chemical mechanical polishing (CMP) of polycrystalline diamond (PCD). The PCD surface was firstly modified using •OH generated by He-based H<sub>2</sub>O<sub>2</sub> plasma leading to the formation of an approximately 30 nm thick uniform oxidation layer on the PCD surface composed of carbon-oxygen mixed layer and oxygen-rich layer. Reactive force field molecular dynamics (ReaxFF MD) simulations explained the plasma modification mechanism. The modified layer was then removed using CMP resulting in an atomic-level flat surface with arithmetical mean height (Sa) of 0.366 nm.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 441-445"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611554","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":"Design and control of flexible handling systems based on mobile cooperative multi-robot-systems","authors":"Tobias Recker, Annika Raatz (2)","doi":"10.1016/j.cirp.2025.04.059","DOIUrl":"10.1016/j.cirp.2025.04.059","url":null,"abstract":"<div><div>This study introduces a scalable control framework for Cooperative Multi-Robot Systems (cMRS), enhancing flexibility in manufacturing by adapting single-robot motion sequences to multi-robot setups. The framework addresses kinematic overdetermination via a Virtual Robot Model (VRM), which centralizes motion specification without straining computational resources, allowing seamless scaling. Experimental results demonstrate that cMRS configurations with varying robot numbers can achieve object transport and handling with accuracy comparable to single-robot systems under admittance control. Although larger configurations show increased maximum tracking errors, average accuracy remains stable, demonstrating the framework’s effectiveness for scalable cooperative robotics.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 25-29"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611793","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":"Constellation-based robotic visual servoing method for fault diagnosis of used printed circuit board assemblies","authors":"Bence Tipary , Gábor Erdős (2) , Zsolt Kemény","doi":"10.1016/j.cirp.2025.04.080","DOIUrl":"10.1016/j.cirp.2025.04.080","url":null,"abstract":"<div><div>The mainstream of diagnostic approaches of printed circuit board assemblies is optimised for large-scale industrial production, and is less suited for repair and maintenance during later stages of the product life-cycle. Main challenges include sparse documentation, small batch sizes and high product diversity, to which existing solutions are too costly, bulky or parameter-sensitive for industrial use. The paper presents a novel approach using computer vision, visual servoing and digital twins for robotic positioning of a measuring probe head. Subject to patent application, the method has proven its feasibility and affordability in live industrial practice with 99.80% success rate.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 43-47"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611796","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":"Sub-surface sinking effect of reinforcement particle in laser assisted machining of metal matrix composites","authors":"Omkar Mypati , Zhirong Liao (2) , Shusong Zan , Rachid M'Saoubi (1) , Dragos Axinte (1)","doi":"10.1016/j.cirp.2025.04.041","DOIUrl":"10.1016/j.cirp.2025.04.041","url":null,"abstract":"<div><div>Aluminium-based SiC particle-reinforced metal matrix composites are widely used in engineering applications due to their exceptional mechanical properties. However, their machining remains challenging due to the mismatch of material properties between the brittle SiC particles and the ductile aluminium matrix, causing tool wear and surface damage. To mitigate these issues, laser inverse problem scanning is utilised to strategically melt the top layer aluminium matrix, allowing the SiC particles to sink and promoting more ductile Al-matrix. The strategic hybrid laser milling approach optimises particle sinking, reduces tool wear and enhances surface integrity by minimising particle fracture, pullout and refining microstructure.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 93-97"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611802","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":"Physics-based modelling and validation of dynamically varying thermal and mechanical residual stress fields in finish machining of aerospace alloys","authors":"Julius Schoop, I.S. Jawahir (1)","doi":"10.1016/j.cirp.2025.04.078","DOIUrl":"10.1016/j.cirp.2025.04.078","url":null,"abstract":"<div><div>While the physics of chip formation have been widely studied, there remains a need for greater qualitative and quantitative understanding of the way thermal and mechanical loads, and particularly their dynamic variability across length and time scales affect both the magnitude and variability of machining-induced residual stress (MIRS). This paper leverages an advanced in-situ characterization technique along with a physics-based process model to accurately and quickly predict key MIRS variables for aerospace alloys Inconel 718 and Ti-6Al4V. Our analysis clearly shows opportunities for digitally enabled predictability of engineered surface integrity to evaluate the fatigue performance of aerospace alloys more effectively.</div></div>","PeriodicalId":55256,"journal":{"name":"Cirp Annals-Manufacturing Technology","volume":"74 1","pages":"Pages 109-112"},"PeriodicalIF":3.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611805","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}