Martina Panico, M. Durante, A. Langella, L. Boccarusso
{"title":"Numerical and theoretical approach to evaluate the clamping force and the interlayer gap extent during drilling of stacked materials","authors":"Martina Panico, M. Durante, A. Langella, L. Boccarusso","doi":"10.1177/09544054241238477","DOIUrl":"https://doi.org/10.1177/09544054241238477","url":null,"abstract":"In the aeronautical industry, one-shot drilling of stacked materials is a widely adopted and established solution. However, ongoing discussions persist, particularly regarding the issue of interlayer gap formation that arises when two or more unsealed materials are drilled together. This study aims to present a simplified and reproducible theoretical model based on the equation of the elastic curve applied to structural schemes that discretize and describe the interlayer gap phenomenon in the drilling process. The model is designed to estimate the extent of the interlayer gap phenomenon and predict the clamping force required for its reduction when an end-effector is employed as a clamping device during the drilling of stacked sheets. Experimental and finite element analyses were conducted to validate the results of the proposed theoretical model. Each model was developed and applied to a real structural unit of a fuselage panel, considering actual boundary conditions in terms of structural constraints and geometric features of the assembly. The results obtained in this study demonstrate that the proposed one-dimensional theoretical model consistently aligns with experimental and numerical observations obtained through finite element analysis. This offers an effective and readily implementable solution in an industrial context as a tool for sizing the clamping force exerted by a clamping device.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140230420","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}
Aru Ranjan Singh, Thomas Bashford-Rogers, Kurt Debattista, Sumit Hazra
{"title":"Deep Learning Approach for automatic detection of split defects on sheet metal stamping parts","authors":"Aru Ranjan Singh, Thomas Bashford-Rogers, Kurt Debattista, Sumit Hazra","doi":"10.1177/09544054241236224","DOIUrl":"https://doi.org/10.1177/09544054241236224","url":null,"abstract":"Sheet metal stamping processes are used primarily for high-volume products produced for a range of sectors, from white goods manufacturing to the automotive and aerospace sectors. However, the process is susceptible to defects. Due to the numerous potential defects that may arise in the stamping product, human inspectors are often deployed for their detection. However, they are unreliable and expensive, especially when operating at production speeds equivalent to the stamping rate. This study investigate CNN-based automatic inspection for stamping defects. The study carried out two sets of experiments. All the Experiments yielded high classification accuracy, recall and precision demonstrating the viability of the CNN method for defect detection in the sheet metal stamping process. Additionally, this study revealed that in limited data confounding factors can be a challenge. The second experiment further explored the impact of small neck defects, harsh lighting and reflections on defect detection. The observations indicated that the model struggled to identify defects occluded by reflections, particularly small neck defects.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140247399","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}
Alexia Torres-Salcedo, Ignacio Puertas-Arbizu, C. J. Luis-Pérez
{"title":"Development of a machining strategy to manufacture SiSiC nuts by EDM","authors":"Alexia Torres-Salcedo, Ignacio Puertas-Arbizu, C. J. Luis-Pérez","doi":"10.1177/09544054241236217","DOIUrl":"https://doi.org/10.1177/09544054241236217","url":null,"abstract":"Today, the high-precision manufacturing of small cavities in difficult-to-machine materials is still a challenge, even more so if they need to be threaded. The machining time, the wear suffered by the electrodes and the surface finish are determining factors in the efficiency of the threading process. However, there is scant literature on this subject so there is a need to study the process and the parameters involved. Thus, this study presents a novel machining strategy for the manufacture of nuts using die-sinking electrical discharge machining (EDM). Moreover, the novelty of this strategy is that it is carried out in a single stage and with a conventional EDM generator. To do so, a design of experiments (DOE) methodology has been followed. First, the optimal machining conditions are determined by studying the influence of EDM parameters on operation variables and mathematical models are developed using multiple linear regression. These models allow the behavior of the response variables under study to be predicted. Finally, this machining strategy developed from the previous experimental results is validated in the manufacturing process of a final part, specifically a square nut. It can be concluded that the mathematical model is good enough to predict the experimental results. Thus, the new method presented and described in this present study allowed a nut to be obtained with a real arithmetic mean deviation of the roughness profile (Ra) value of 1.27 μm whereas the predicted value from the model was 1.28 μm. To do so, the machining conditions selected were: 4 A (current intensity), 5 µs (pulse time) and 0.4 (duty cycle), which also gave a material removal rate (MRR) value of 0.5370 mm3/min. The machining strategy proposed here may be used for future research works related to the manufacturing of mechanical joints made of conductive ceramic materials.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140247870","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":"Identification of MAG welding metal droplet transfer patterns based on features of input power","authors":"Xiaoqing Lv, Haoyang Su","doi":"10.1177/09544054241236514","DOIUrl":"https://doi.org/10.1177/09544054241236514","url":null,"abstract":"An experimental platform was built for simultaneous acquisition of the input and output electrical signals as well as droplet transfer images during the welding process. By analyzing the rectifier circuit of the welder, the calculation method of the instantaneous input power, the instantaneous input power envelope, and the input pulsating energy (EP) were given. The input pulsating energy was found to better characterize the dynamical change process at the output terminal upon comparison. Then, the short circuiting transfer, free transfer and mixed transfer patterns were obtained by varying the wire feeding speed and the given voltage. Based on the standard variance (SD) and coefficient of variation of the input pulsating energy (v(Ep)), the parameter variations in different transition patterns and the stability of the transition process were compared and analyzed. The results reveal that the v(Ep) was greater than 18% for short circuiting transfer and less than 9% for free transfer.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246757","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}
Xirui Cao, Zhi Lin, C. Yue, Zhongguang Yu, X. Liu, Desheng Hu
{"title":"Construction and application of online parametric modeling platform for face milling cutters based on WebGL and Open CASCADE","authors":"Xirui Cao, Zhi Lin, C. Yue, Zhongguang Yu, X. Liu, Desheng Hu","doi":"10.1177/09544054241236814","DOIUrl":"https://doi.org/10.1177/09544054241236814","url":null,"abstract":"The secondary development of traditional commercial CAD/CAE software has been widely used in the process of cutting tools design and optimization. However, limited by copyright and hardware configuration, the effect of this development is limited, and the secondary development can no longer meet the needs of rapid and accurate cutting tools design. With the rapid development of Internet, online cutting tools CAD software based on Web has become a new development direction with its characteristics of specialization and lightweight. In order to build an online cutting tools CAD software, an online parametric design platform for indexable face milling cutters is established based on Web development technology, Open CASCADE and Three.js. The platform can quickly generate a 3D basic model for NC machining programing and a 3D detailed model for finite element simulation of cutting process according to ISO 13399. Based on the built platform, the finite element simulation model of cutting process of indexable surface milling cutter is established. The establishment of the model can play an important role in improving the design efficiency and reducing the design cost for the optimal design of this kind of milling cutter.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140247625","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}
Jiantao Zhao, Ya Chen, Lida Shen, Haozhe Pang, Ziyang Yu, Kai Zhou, Dazhi Huang, Dongsheng Wang
{"title":"One-step preparation of high performance Ni-MoS2 self-lubricating coatings via jet electrodeposition on additive manufactured aluminum alloy","authors":"Jiantao Zhao, Ya Chen, Lida Shen, Haozhe Pang, Ziyang Yu, Kai Zhou, Dazhi Huang, Dongsheng Wang","doi":"10.1177/09544054241232316","DOIUrl":"https://doi.org/10.1177/09544054241232316","url":null,"abstract":"Composite coatings with solid lubricants can improve the tribological performance of aluminum alloy parts prepared by Laser Powder Bed Fusion (LPBF). In this study, Ni-MoS2 self-lubricating composite coatings were one-step prepared on additive manufactured aluminum alloy surface via jet electrodeposition. The properties and lubrication performance of the coatings prepared using composite electrolyte with different MoS2 particle diameters and concentrations were investigated. The lubrication mechanism of the composite coating was discussed. The results showed that 0.8 μm MoS2 had less agglomeration than 80 nm, resulting in a uniform surface. The lubrication performance of the composite coating was affected by MoS2 particles content and coating hardness. With the increase of MoS2 concentration in the composite electrolyte, the friction coefficient and wear rate decreased, and achieved the best lubrication performance of 0.12 friction coefficient and 0.11 mg/m wear rate when MoS2 composite electrolyte is 5 g/l and MoS2 is 0.8 μm. However, the addition of soft MoS2 decreased the coating hardness, lower hardness will cause lubrication failure.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443106","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":"The impact of mechanical properties on the cutting performance of Al2O3-based ceramic cutting tools for green turning of hardened steel","authors":"Xiuying Ni, Jun Zhao, F. Gong","doi":"10.1177/09544054241229490","DOIUrl":"https://doi.org/10.1177/09544054241229490","url":null,"abstract":"The utilization of green turning as an alternative to grinding has the potential to enhance the processing efficiency of hardened steel while also preserving the environment. However, the intermittent turning of hardened steel necessitates the tool to possess exceptional comprehensive mechanical properties. Consequently, this study aimed to investigate the impact of mechanical properties on the cutting performance of three Al2O3-based ceramic cutting tools, namely SG4, CC650, and CC670 by conducting interrupted turning experiments on hardened steel at both low and high speeds. The findings revealed that for different ceramic tool, it was not the smaller the speed, the smaller the cutting force when intermittently cutting hardened steels. In general, an optimal cutting speed existed where the workpiece material softened at a faster rate than the tool material due to cutting heat, resulting in minimized main cutting forces. Consequently, during the initial cutting stage, the cutting force of CC670 measured at 110 m/min was slightly higher than that at 230 m/min. The primary failure mechanism of CC670 at high speeds was mechanical fatigue. In high-speed cutting scenarios where tool failure was not primarily caused by thermal shock, the tool CC670, possessing superior mechanical properties, demonstrated a longer lifespan. When the multiple mechanical performance indices do not consistently reach their maximum values simultaneously under the current process conditions, an ideal cutting tool structure would feature a tool nose characterized by exceptional hardness and chemical stability, while the remaining section of the cutting tool should demonstrate high fracture toughness and flexural strength.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140454277","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":"Temperature prediction model of bone drilling considering the effect of tool wear","authors":"Yufei Feng, Yuan Tao, Shanshan Hu, Fan Yang, Hongqun Tang, Genge Zhang","doi":"10.1177/09544054241229776","DOIUrl":"https://doi.org/10.1177/09544054241229776","url":null,"abstract":"Biomass bone is biologically active and sensitive to heat; excessive temperatures would destroy the biological activity of the bone tissue or even cause bone necrosis. Therefore, it is vital to control the drilling temperature in clinical surgery for internal fixation of fractures. This paper focused on the influence of tool wear on the drilling temperature during the bone drilling process. The effect of three drilling parameters, the tool diameter, machine spindle speed and tool feed speed, on three dynamic characteristics, the drilling force, drilling temperature and tool wear, was investigated through bone drilling experiments. A prediction model of the bone drilling temperature considering the effect of the amount of wear was established based on Archard wear theory and the heat source method, and was in good agreement with the experimental results. The predicted results showed that worn bits produced drilling temperatures up to 3.4°C higher than those of new bits, and the maximum error in the prediction of the drilling temperature was 11.04%. The temperature model better extended the applicability of the existing temperature models.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139960526","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":"Predictive analysis of the precision remaining useful life of CNC machine tools based on meta-action unit","authors":"Junfa Li, Minghui Gu, Yulong Li, Shutao Wen, Genbao Zhang","doi":"10.1177/09544054241229488","DOIUrl":"https://doi.org/10.1177/09544054241229488","url":null,"abstract":"Taking into consideration the dynamic characteristics of motion error propagation in CNC machine tools, in order to enhance the accuracy of PRUL (precision remaining useful life) prediction analysis, this paper presents a precision degradation modeling approach based on MAU (meta-action unit) for CNC machine tools. Firstly, from the perspective of motion, the CNC machine tool is divided into the smallest unit by the decomposition of FMA (Function-Motion-Action). Secondly, the MBS (multi-body systems) theory is used to topologically describe the motion relationship between the MAU, and the spinor theory is used to model the motion error. Thirdly, considering the influence of multiple error sources on the PRUL of the CNC machine tool MAU, the motion transmission ratio is used to synthesize multiple error sources, and combined with the constructed error model, the precision degradation model of MAU is constructed, and its PRUL is accurately predicted. Finally, the CNC turntable is selected as the experimental subject to compare the proposed method with commonly used methods in terms of rationality, applicability, and simplicity, and the results verify the applicability and correctness of the method proposed in this paper.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139961287","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 laser texturing process on properties of composite coated cemented carbide ball-end milling cutter milling titanium alloy","authors":"Xin Tong, Shoumeng Wang","doi":"10.1177/09544054241229496","DOIUrl":"https://doi.org/10.1177/09544054241229496","url":null,"abstract":"To explore the strengthening mechanism of the laser texturing process on the surface of composite coating (AlCrN/AlTiSiN) cemented carbide and improve the application rate of laser texturing process in the field of tool cutting. Firstly, the influence of laser texturing process on the surface properties of composite coated cemented carbide was compared and analyzed. Secondly, a test platform for milling titanium alloy with composite coated cemented carbide ball-end milling cutters with different meso-geometry features parameters (blunt round edge radius and micro-texture distance from cutting edge) was built. Finally, the influence analysis and the optimization of geometric characteristic parameters were carried out with milling force, tool wear and workpiece surface roughness as dependent variables. It is concluded that the laser texturing process can significantly improve the phase structure of the composite coating and improve the quality of the coating. The influence of meso-geometry features on milling force, tool wear, and workpiece surface roughness and the parameter optimization of a single dependent variable are obtained by the milling test. Based on the genetic algorithm, the optimal meso-geometry features parameters of the carbide ball-end milling cutter are obtained, that is, the blunt round edge radius is 20.15 μm, and the micro-texture distance from cutting edge is 119.463 μm. It provides a practical basis for the application of laser-textured coating technology in the field of cutting tools.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139961691","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}