Procedia CIRP最新文献_第10页

Well-informed neural network: an approach for the prediction of the width of flank wear land in turning processes 充分信息神经网络：车削过程中侧面磨损面宽度预测方法

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.02.016

S. Stemmer , B. Papenberg , L. Langenhorst , J. Sölter , D. Meyer , A. Fischer , K. Tracht , B. Karpuschewski

{"title":"Well-informed neural network: an approach for the prediction of the width of flank wear land in turning processes","authors":"S. Stemmer , B. Papenberg , L. Langenhorst , J. Sölter , D. Meyer , A. Fischer , K. Tracht , B. Karpuschewski","doi":"10.1016/j.procir.2025.02.016","DOIUrl":"10.1016/j.procir.2025.02.016","url":null,"abstract":"<div><div>Precise information on the current state of the tool wear is essential in machining processes in order to produce workpieces with an adequate surface quality as well as to use the full tool capacity and save valuable resources. In this work, different artificial neural networks are developed and compared to a regression model to predict the width of flank wear land by using measured cutting force as input data. In particular, a “well-informed” neural network approach is introduced. This is inspired by physics-informed neural networks, in which differential equations are taken into account, but uses empirical knowledge instead. Turning experiments with three different feeds were conducted and tool wear was measured at several process times until tool failure. Measured data for two of the feeds were used for training and data for the third feed were used for testing. As a result in the test scenario, the well-informed neural network with pre-knowledge based on Kienzle’s cutting force equation yielded the highest accuracy in tool wear prediction, outperforming both a regression approach with no artificial neural network extension and an artificial neural network with no pre-knowledge. By changing the datasets used for training and testing, the results also reveal a better extrapolation capability compared to the artificial neural network without pre-knowledge.</div><div><span><span><span><svg><path></path></svg><span><span>Download: <span>Download Acrobat PDF file (241KB)</span></span></span></span></span></span></div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"133 ","pages":"Pages 84-89"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Static stiffness analysis of an electronically preloaded rack and pinion feed drive system 电子预加载齿轮齿条进给传动系统的静刚度分析

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.01.012

Oier Franco , Xavier Beudaert , Ibai Ulacia , Kaan Erkorkmaz , Jokin Munoa

引用次数: 0

Development of an engineering drawing detection and extraction algorithm for quality inspection using deep neural networks 基于深度神经网络的工程图纸检测与提取算法研究

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.01.023

Madania Mahira Agritania , Mohammad Mi’radj Isnaini

引用次数: 0

Study on the electron dynamics of MoS2 under ultraviolet femtosecond laser irradiation 紫外飞秒激光辐照下二硫化钼的电子动力学研究

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.01.006

Huimin Qi, Jinshi Wang

{"title":"Study on the electron dynamics of MoS2 under ultraviolet femtosecond laser irradiation","authors":"Huimin Qi, Jinshi Wang","doi":"10.1016/j.procir.2025.01.006","DOIUrl":"10.1016/j.procir.2025.01.006","url":null,"abstract":"<div><div>As a promising two-dimensional (2D) material, MoS<sub>2</sub> exhibits considerable potential for applications in miniaturized optoelectronic devices. Although extensive research has been conducted on laser processing techniques for patterning or thinning MoS<sub>2</sub>, studies on the interaction mechanisms between lasers and MoS<sub>2</sub> relatively limited. This paper employs first-principles methods based on time-dependent density functional theory (TDDFT) to systematically investigate the excited-state properties of MoS<sub>2</sub> under ultraviolet laser irradiation, which enhances our understanding of the interaction processes between femtosecond lasers and 2D materials. The study explores the impact of laser intensity on energy deposition, photoinduced current, and the distribution of electron-hole pairs. The results indicate that the modulus of the optical conductivity decreases rapidly with increasing laser intensity, highlighting a more pronounced saturation absorption effect in the current. Additionally, a phase transition was observed at a laser intensity of 5×10<sup>12</sup> W/cm<sup>2</sup>, providing new insights into laser-induced phase transitions. By analyzing the spatiotemporal distribution of charge carriers, the study elucidates the mechanisms of charge carrier transport. These simulation results establish a foundation for optimizing laser processing techniques for MoS<sub>2</sub>.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"132 ","pages":"Pages 31-36"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on drilling machinability of CFRP: Tool geometry, hole quality and process monitoring analysis CFRP钻削可加工性试验研究：刀具几何形状、孔质量及过程监控分析

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2024.09.016

Iker Urresti Espilla , Martin Telleria , Iñigo Llanos , Luis Norberto López de Lacalle

{"title":"Experimental study on drilling machinability of CFRP: Tool geometry, hole quality and process monitoring analysis","authors":"Iker Urresti Espilla , Martin Telleria , Iñigo Llanos , Luis Norberto López de Lacalle","doi":"10.1016/j.procir.2024.09.016","DOIUrl":"10.1016/j.procir.2024.09.016","url":null,"abstract":"<div><div>Due to their lightweight and high strength properties, components made of CFRP play a fundamental role in the aerospace industry. Hole-making of these parts is usually required for the following assembly process, with the drilling process of composite parts being one of the most important and critical manufacturing process steps. However, due to the non-homogeneous anisotropic nature of the material and highly abrasive and hard reinforced fibers, CFRP is usually regarded as difficult-to-machine material. Several drilling-induced defects can arise such as delamination, fiber pull-out and uncut fibers, burrs or micro cracking, leading to the rejection of costly aerospace parts. A correct choice of cutting tools and conditions is essential in addition to process monitoring techniques for ensuring desired hole quality. In this context, the present work presents an experimental work where the benchmarking of two cutting tool geometries and cutting conditions are carried out to analyze their effect on the drilled holed quality. Additionally, a novel cutting force-based process monitoring analysis is presented for online hole damage identification, focusing on cutting tool entry and exit regimes. Based on the results of this study, optimum cutting geometries are identified, and the importance of the tool point geometry and tool wear are highlighted as the main aspects affecting the generation of push-out delamination defects. Within this context, the suitability of twist drills with higher point angles is observed, achieving high quality holes. Hence, the present work introduces a drilling process optimization methodology applicable to aerospace assembly industrial processes.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"131 ","pages":"Pages 80-85"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced allowance planning of CFRP composites exploiting the pattern of chopped carbon fibre reinforcement clusters 利用短切碳纤维增强团簇模式的CFRP复合材料余量规划

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2024.09.021

Norbert Geier , Gergely Magyar

{"title":"Advanced allowance planning of CFRP composites exploiting the pattern of chopped carbon fibre reinforcement clusters","authors":"Norbert Geier , Gergely Magyar","doi":"10.1016/j.procir.2024.09.021","DOIUrl":"10.1016/j.procir.2024.09.021","url":null,"abstract":"<div><div>Conventional allowance planning of carbon fibre-reinforced polymer composite plates that must be mechanically machined is based on mainly the analysis of the precision of composite manufacturing technologies. This approach neglects the impact of randomly oriented and positioned chopped fibre reinforcement clusters leading to unpredictable fibre cutting angles and inconsistent quality during machining. To address this issue, we developed an innovative allowance planning method for polymer composites reinforced with chopped fibres. Our approach optimizes the size of the non-uniform allowance to minimize machining-induced burrs on the machined edges by detecting fibre reinforcement clusters on the composite surface through digital image processing and employing a convolution-based optimization of geometric feature patterns. Validation through drilling experiments demonstrated that our method improved the average burr factor by 50% compared to a conventional allowance planning technique. Although the proposed method is recommended to be improved to manage the effects of three-dimensional fibre clusters on burr occurrence, it encourages a novel direction in allowance planning of composites having non-defined directional reinforcements.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"131 ","pages":"Pages 130-135"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Manufacturing and Defect Characterization of Rotationally Molded Hybrid Composite Drive Shafts 旋转模压混合复合材料传动轴的制造与缺陷表征

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2024.09.003

Patrick Schaible , Daniel Büchner , Sebastian Schabel , Jürgen Fleischer

{"title":"Manufacturing and Defect Characterization of Rotationally Molded Hybrid Composite Drive Shafts","authors":"Patrick Schaible , Daniel Büchner , Sebastian Schabel , Jürgen Fleischer","doi":"10.1016/j.procir.2024.09.003","DOIUrl":"10.1016/j.procir.2024.09.003","url":null,"abstract":"<div><div>One way of reducing greenhouse gas emissions is the consistent use of lightweight design. By reducing the moving mass, energy requirements can be lowered. Fibre-reinforced plastic composites are particularly suitable for lightweight components with very high mechanical requirements and a long service life. This article presents the production and investigation the influence of manufacturing process parameters on the defects of rotationally moulded parts using the example of a drive shaft. The hybrid components are manufactured using a rotational moulding process in which braided preforms and load introduction elements are processed in a single step. The elements are intimately bonded by a thermosetting matrix under the influence of temperature and centrifugal force. Different process parameters such as rotational speed, matrix temperature, mould temperature and mould unbalance are varied and the influence on the component properties are investigated. Furthermore, a catalogue of characteristics for the classification of manufacturing defects is created. It can be shown that different types of defects occur along the process chain and suitable measurements to minimize the defects are proposed.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"131 ","pages":"Pages 1-6"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A numerical approach to investigate the microstructural damage of hard cemented carbides 研究硬质合金微观组织损伤的数值方法

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.02.057

Muslum Guven , Cyprien Wolff , Mohammed Nouari

{"title":"A numerical approach to investigate the microstructural damage of hard cemented carbides","authors":"Muslum Guven , Cyprien Wolff , Mohammed Nouari","doi":"10.1016/j.procir.2025.02.057","DOIUrl":"10.1016/j.procir.2025.02.057","url":null,"abstract":"<div><div>Hard cemented carbides are frequently used in applications requiring high hardness and wear resistance. In machining process, around 90% of cutting tools are made of tungsten carbide (WC) with different binder contents of cobalt (Co). In this application, the WC-Co is subjected to different wear mechanisms such as abrasion, adhesion, and diffusion. Several models have been developed in the literature to estimate the tool life but only few of them consider the microstructure of cutting tools. At this scale, intergranular and transgranular fracture, which highly contribute to the overall damage of the tool, can be observed. In this work, a numerical modelling based on a finite-element approach has been developed to investigate the microstructural damage as a precursor to the wear process. The aim is to establish a wear model for machining that takes into account the microstructure of the WC-Co tool. This work is a first step of this model. The microstructure of a representative elementary volume (REV) of WC-Co is generated by an algorithm based on a Voronoi tessellation. To reproduce the mechanical behavior of the WC and Co phases, Drucker-Prager and Johnson-Cook yield criteria have been used. In addition, the damage behavior of the WC/WC and WC/Co interfaces and the WC and Co phases have been simulated by cohesive interface and ductile damage models, respectively. The microstructure has been subjected to different contact pressures on one of its faces by a sliding rigid body. Microstructure damage was found to increase progressively with increasing contact pressure. First qualitative comparisons of the numerical results with experiments from the literature confirmed the good consistency of the model with experimental observations.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"133 ","pages":"Pages 328-333"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient 3D Simulation of electrolyte flow in a removal device for the determination of process input parameters according to DIN SPEC 91399 根据DIN SPEC 91399确定工艺输入参数的去除装置中电解液流动的瞬态三维模拟

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.02.051

Nils Paucke , Alexander Thielecke , Richard Petermann , Gunnar Meichsner , Matthias Hackert-Oschätzchen

{"title":"Transient 3D Simulation of electrolyte flow in a removal device for the determination of process input parameters according to DIN SPEC 91399","authors":"Nils Paucke , Alexander Thielecke , Richard Petermann , Gunnar Meichsner , Matthias Hackert-Oschätzchen","doi":"10.1016/j.procir.2025.02.051","DOIUrl":"10.1016/j.procir.2025.02.051","url":null,"abstract":"<div><div>Pulsed Electrochemical Machining (PECM) is based on the principle of anodic metal dissolution with pulsed direct current. To ensure the charge transfer between the anode (workpiece) and the cathode (tool), an electrically conductive medium, the electrolyte, flows in the working gap between the two electrodes.</div><div>The removal results of PECM are essentially influenced by the current density distribution in the working gap and by the material to be processed. For these reasons, removal experiments according to DIN SPEC 91399 are important to determine process input parameters for the process design.</div><div>In this study, transient 3D simulations of electrolyte flow in a PECM removal device, which is suitable for experiments according to DIN SPEC 91399, are shown. The influence of the parameters pressure difference and working distance on the flow rate and the flow velocity field in the working gap are analysed to gain a deeper understanding of the determination process. Afterwards experimental results are discussed, which show a correlation between flushing marks on X90CrMoV18 samples and the flow velocity field from the simulations.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"133 ","pages":"Pages 292-297"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Online Monitoring for Milling Stability Boundary Considering Tool Wear 考虑刀具磨损的铣削稳定边界在线监测

Procedia CIRP Pub Date : 2025-01-01 DOI: 10.1016/j.procir.2025.02.052

Yuyue Yu , Xiaoming Zhang , Han Ding

{"title":"The Online Monitoring for Milling Stability Boundary Considering Tool Wear","authors":"Yuyue Yu , Xiaoming Zhang , Han Ding","doi":"10.1016/j.procir.2025.02.052","DOIUrl":"10.1016/j.procir.2025.02.052","url":null,"abstract":"<div><div>Stability of the machining process is a prerequisite to ensure the dimensional accuracy and high-quality surface of parts in the milling process. Considering the milling process of titanium alloy with severe tool wear, the stability domain boundary changes significantly with changing machining dynamics. Therefore, the online stability prediction is especially important to improve machining efficiency and surface quality. Firstly, according to simulation and experimental results of the stability domain, the machine learning binary classification method Support Vector Machine is introduced to calculate the initial domain boundary. During the tool wear process, the stability identification method based on energy entropy is applied to determine whether the current machining state has changed, and an incremental learning model based on sequential minimal optimization algorithm to update the stability boundary. An online monitoring model for the position and shape of stability domain boundary is established. To verify the proposed method, the milling experiments with tool wear as the single variable is carried out to demonstrate the accuracy of method in practical application.</div></div>","PeriodicalId":20535,"journal":{"name":"Procedia CIRP","volume":"133 ","pages":"Pages 298-303"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0