Manufacturing Letters最新文献_第6页

Coupled 3D non-orthogonal constitutive model for woven composites in preforming and compaction processes 预成型和压实过程中编织复合材料的三维非正交耦合结构模型

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.049

Deyong Sun , Wanrui Zhang , Jianchao Zou , Yifeng Xiong , Chongrui Tang , Weizhao Zhang

{"title":"Coupled 3D non-orthogonal constitutive model for woven composites in preforming and compaction processes","authors":"Deyong Sun , Wanrui Zhang , Jianchao Zou , Yifeng Xiong , Chongrui Tang , Weizhao Zhang","doi":"10.1016/j.mfglet.2024.09.049","DOIUrl":"10.1016/j.mfglet.2024.09.049","url":null,"abstract":"<div><div>Woven composites are considered promising for lightweight applications with great environmental and economic benefits. One of the most promising techniques for mass-production of woven composite parts with complex geometry is closed-mold thermoforming including preforming, compaction/consolidation and curing steps. The ignored effects on non-uniform thickness deformation and compaction modulus caused by preforming are considered in the coupled 3D non-orthogonal constitutive model to capture the coupled material behaviors during preforming and compaction. The in-plane tension, compression and shear modulus in the model are calibrated using tension, bending and bias-extension experiments, respectively. Meanwhile, the out-plane compaction experiments are designed, with high-accuracy measurement method for the initial thickness and deformation process, to obtain the material properties of sheared woven composites. These experiments can be regarded as one benchmark for compaction tests of woven composites. The new material model has been implemented in Abaqus software and validated by the bias-extension experiments.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 412-420"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434300","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

Data analytics for working performance analysis in production management 生产管理中用于工作绩效分析的数据分析

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.011

Yuxin Wang, Yishu Yang, Ray Y. Zhong

引用次数: 0

Mid-spatial frequency reduction via zero-depth of cut rapid-feed passes in face-turning 通过面车加工中的零切削深度快速进给通道降低中空间频率

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.054

Aravind Shriram, Nithya Srimurugan, Sathyan Subbiah

{"title":"Mid-spatial frequency reduction via zero-depth of cut rapid-feed passes in face-turning","authors":"Aravind Shriram, Nithya Srimurugan, Sathyan Subbiah","doi":"10.1016/j.mfglet.2024.09.054","DOIUrl":"10.1016/j.mfglet.2024.09.054","url":null,"abstract":"<div><div>The single point diamond turning process (SPDT) is used widely in creating optical grade mirror surfaces on several engineering materials ranging from polymers, and metals, to brittle materials such as silicon and germanium. In visual optic mirror applications, mid-spatial frequency (MSF) errors generated during the SPDT process interfere with the visible spectrum of light thereby affecting the image quality. To overcome these errors, a post-processing operation of polishing the optical mirrors is required. The post-processing step not only increases the complexity of the manufacturing process but also leads to minor geometrical form changes in the mirror which affects performance. To avoid post-processing and minimize MSFs formed during turning- a novel method to modify the toolpath during the machining process has been proposed in this paper. The suggested toolpath strategy comprises two consecutive operations: i) employing variable low feed rates with the specified depth of cut (DoC) and ii) executing rapid traverse rates with zero depth of cut for a predetermined number of passes. The effectiveness of the proposed strategy is tested by carrying out facing experiments in a micro-precision CNC lathe. The power spectral density (PSD) content of the machined surface is then analyzed to check for any improvement in the frequency characteristics. The results show that the frequency errors generated by the toolpath in normal turning operations can be minimized, distributing the resulting PSD peak over a wide range of spatial frequencies. From the PSD plots, it is observed that there is a decrease of 77% and 85.82% in the peak intensity values when compared with surfaces machined at constant feedrates of 150 μm/rev and 200 μm/rev respectively. This method can be applied to nanoprecision SPDT machines to improve the surface quality and to eliminate the MSF errors of the visual optical grade mirrors without the need for post-processing.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 451-456"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434209","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

Thermal profile modeling and microstructural evolution in laser processing of Inconel 625 plates by comparison of analytical and numerical methods 通过比较分析和数值方法，建立因科镍合金 625 板材激光加工过程中的热曲线模型和微观结构演化

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.091

Stephanie B. Lawson, Milad Ghayoor, Xianzhe Fu, Ali Tabei, Andy Fan, Somayeh Pasebani

{"title":"Thermal profile modeling and microstructural evolution in laser processing of Inconel 625 plates by comparison of analytical and numerical methods","authors":"Stephanie B. Lawson, Milad Ghayoor, Xianzhe Fu, Ali Tabei, Andy Fan, Somayeh Pasebani","doi":"10.1016/j.mfglet.2024.09.091","DOIUrl":"10.1016/j.mfglet.2024.09.091","url":null,"abstract":"<div><div>Microstructural evolution of materials under specified process conditions and parameters can be predicted by thermal modeling of additive manufacturing laser processes. The objective of this study was to develop, analyze and compare two methods for prediction: an analytical method and a numerical method for laser processing of Inconel 625 material. These methods were compared with experimental results for thermal profiling, and the effect of thermal profiles on microstructure of the experimental samples was explored. Maximum temperature and cooling rate of the numerical method were shown in good agreement, while the analytical method proved more challenging when compared to the experimental results for three laser parameters. Cooling curves were correlated with microstructure in terms of grain size, morphology, and orientation, with findings trending with parameter adjustments. This research supports the numerical modeling approach as a method for examining optimal laser processing conditions for Inconel 625 that is ideally suited for complex fluid flow analyses.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 730-741"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434370","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

Optical inspection of stator slots for electric motors 对电机定子槽进行光学检测

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.014

Sean Wagner, John Agapiou

{"title":"Optical inspection of stator slots for electric motors","authors":"Sean Wagner, John Agapiou","doi":"10.1016/j.mfglet.2024.09.014","DOIUrl":"10.1016/j.mfglet.2024.09.014","url":null,"abstract":"<div><div>An optical non-contact inspection system was developed for measuring the slots in stator lamination stacks. To avoid passing go/no-go gage blocks through the slots, a machine vision system is instead used to measure the stator core slots and identify the presence of burrs within the slots. Utilizing telecentric optics along with an alignment monitoring system configured to monitor and orient the stator core, the core slots can be oriented relative to the imaging axis for further metrology measurements. Among these measurements, the smallest opening dimensions (slot width and depth) of each slot due to misalignment of laminations and the detection of burrs along the edges of the slots throughout the length of the lamination stack are critical for full stator assembly. Advanced image processing algorithms were developed to obtain sub-pixel accuracy which is required to measure the slots. This, used in conjunction with a robust vision calibration technique, increases the feasibility of building a device that can be implemented as a production inspection system. Experiments show the reliability of the computer vision approach and how it can be used in the inspection of slots in lamination stacks.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 103-112"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434344","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

Implementation strategy for launch and performance improvement of high throughput manufacturing inspection systems 启动高产能制造检测系统并提高其性能的实施战略

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.018

J. Patrick Spicer , Debejyo Chakraborty , Michael Wincek , Jeffrey Abell

{"title":"Implementation strategy for launch and performance improvement of high throughput manufacturing inspection systems","authors":"J. Patrick Spicer , Debejyo Chakraborty , Michael Wincek , Jeffrey Abell","doi":"10.1016/j.mfglet.2024.09.018","DOIUrl":"10.1016/j.mfglet.2024.09.018","url":null,"abstract":"<div><div>Product technologies are changing rapidly in advanced automotive propulsion systems. These products are driving the need for new manufacturing processes and new inspection methods. To keep new propulsion systems affordable and ensure these new products are introduced with high quality, automotive manufacturers are seeking automated inspection solutions with low cost and near-zero error rates to inspect 100% of the items. In this paper, a progressive deployment strategy of a hybrid inspection system is presented and studied in the context of technology development and rapid deployment. It enabled us to begin with human inspection and gradually phase-in automated inspection technology, while almost never failing to identify a bad item. This strategy was applied successfully to inspect ultrasonic welds in lithium ion battery packs. At the time of this study, a 75% reduction in human inspection was achieved with prospects for further reduction. Actual results from the implementation of this strategy in production are presented. Recommendations are made regarding the most appropriate time to employ this strategy and how it could increase the use of advanced automated in-line inspection technologies.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 143-152"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434348","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

Feasibility of 5G-enabled process monitoring in milling operations 在制粉作业中实现 5G 工艺监控的可行性

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.024

Liwen Hu , Baihui Chen , ElHussein Shata , Shashank Shekhar , Charif Mahmoudi , Ivan Seskar , Qingze Zou , Y.B. Guo

{"title":"Feasibility of 5G-enabled process monitoring in milling operations","authors":"Liwen Hu , Baihui Chen , ElHussein Shata , Shashank Shekhar , Charif Mahmoudi , Ivan Seskar , Qingze Zou , Y.B. Guo","doi":"10.1016/j.mfglet.2024.09.024","DOIUrl":"10.1016/j.mfglet.2024.09.024","url":null,"abstract":"<div><div>5G monitoring holds immense potential for revolutionizing manufacturing processes by enabling real-time data transmission, remote control, enhanced quality control, and increased efficiency. However, it also presents challenges related to 5G monitoring infrastructure. To explore 5G’s potential for process monitoring, this study introduces a novel 5G-enabled architecture designed to address the challenges, enhancing the process monitoring’s efficiency, accuracy, and reliability in the case of milling operation. To investigate the feasibility of this sophisticated 5G network for process monitoring, two testbeds, i.e., the 5G robotic milling testbed and the 5G CNC milling testbed, have been developed. An accelerometer and a laser scanner have been retrofitted with 5G communications capability to capture critical process signals in the testbeds, respectively. It has shown that the sensor data can be upstreamed to a 5G edge server for data analytics and visualization in ultra-low latency. This work highlights the transformative impact of 5G communication on process monitoring for time-critical manufacturing.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 200-207"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434272","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

Stereolithography-assisted sodium alginate-collagen hydrogel scaffold with molded internal channels 立体光刻辅助海藻酸钠-胶原蛋白水凝胶支架与模塑内部通道

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.045

Chi Wang, Yingge Zhou

{"title":"Stereolithography-assisted sodium alginate-collagen hydrogel scaffold with molded internal channels","authors":"Chi Wang, Yingge Zhou","doi":"10.1016/j.mfglet.2024.09.045","DOIUrl":"10.1016/j.mfglet.2024.09.045","url":null,"abstract":"<div><div>Fabricating internal vascular networks within a hydrogel scaffold is essential for facilitating the supply of nutrients, oxygen, and metabolism exchange required by the encapsulated cells. The challenges in current hydrogel scaffold fabrication involve the difficulty of building adequate internal channels, poor scaffold geometry precision, and low cell viability caused by the fabrication process and polymer material properties. Stereolithography (SLA) stands out as a 3D printing technique distinguished by its superior production efficiency, advanced precision, and remarkable resolution in crafting intricate custom geometries. These attributes establish it as an innovative approach for templates in scaffold fabrication, potentially surpassing the fused deposition modeling (FDM)-based template strategy. Meanwhile, it exerts less shear stress on the cells compared to the direct bioprinting process. This novel strategy enables the fabrication of hydrogel vascular structure within the precision of 500 µm in both channel diameter and wall thickness. In this paper, various sodium alginate and collagen (SA-Col) composite hydrogels with varying collagen concentrations have been investigated to identify the optimal ratio for fabricating hydrogel scaffolds with channels.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 375-383"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434248","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

Metallurgical characteristics and mechanical properties of dissimilar friction stir welded DH36 steel and UNS G10080 steel joints DH36 钢和 UNS G10080 钢异种摩擦搅拌焊接接头的冶金特性和机械性能

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.046

Pardeep Pankaj , Pankaj Biswas , Dave Kim

{"title":"Metallurgical characteristics and mechanical properties of dissimilar friction stir welded DH36 steel and UNS G10080 steel joints","authors":"Pardeep Pankaj , Pankaj Biswas , Dave Kim","doi":"10.1016/j.mfglet.2024.09.046","DOIUrl":"10.1016/j.mfglet.2024.09.046","url":null,"abstract":"<div><div>The present study expanded the scientific comprehension of the friction stir welding process for dissimilar steels, namely high-strength shipbuilding grade DH36 steel and UNS G10080 steel. The effect of tool traverse speed and plunge depth on temperature history, microstructure characteristics, and mechanical properties is investigated experimentally. The metallographic characterizations were examined through an optical microscope and field emission scanning electron microscopy equipped with an energy-dispersive X-ray system. Microhardness, impact, and tensile tests were carried out on the friction-stir-welded specimens. Increasing the plunge depth and reducing the traversal speed resulted in an augmentation of the peak temperature, primarily attributable to higher heat generation. Within the range of process parameters used, the tool produced complex material movement, resulting in swirl-like and vortex-intercalated features, particularly adjacent to the stir zone/workpiece interface. These vortex-like features exhibited dynamically recrystallized fine-grained microstructures. The grain size in the stir zone and the thermo-mechanically affected zone is reduced by increasing the plunge depth and decreasing the traverse speed due to enhanced dynamic recrystallization, subsequently improving the hardness and toughness values. In the stir zone, the microstructure revealed the acicular-shaped bainite ferrite in the DH36 steel and the Widmanstatten ferrite in the UNS G10080 steel. The microhardness contours revealed the uneven hardness distribution across the weld cross-section due to the microstructural heterogeneity in the dissimilar steels. The maximum welding efficiency of 106 % and toughness of 46 J are obtained at 40 mm/min traverse speed with a plunge depth of 0.2 mm, which is attributed to sufficient heat generation and grain refinement.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 384-394"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434252","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

Phase formation and mechanical analysis of sintered Ni25Al25Co15Fe15Mn8Ti7Cr5 high entropy alloy 烧结 Ni25Al25Co15Fe15Mn8Ti7Cr5 高熵合金的相形成和力学分析

IF 1.9

Manufacturing Letters Pub Date : 2024-10-01 DOI: 10.1016/j.mfglet.2024.09.019

Emmanuel Olorundaisi , Bukola J. Babalola , Ufoma S. Anamu , Moipone L. Teffo , Ngeleshi Michel Kibambe , Anthony O. Ogunmefun , Peter Odetola , Peter A. Olubambi

{"title":"Phase formation and mechanical analysis of sintered Ni25Al25Co15Fe15Mn8Ti7Cr5 high entropy alloy","authors":"Emmanuel Olorundaisi , Bukola J. Babalola , Ufoma S. Anamu , Moipone L. Teffo , Ngeleshi Michel Kibambe , Anthony O. Ogunmefun , Peter Odetola , Peter A. Olubambi","doi":"10.1016/j.mfglet.2024.09.019","DOIUrl":"10.1016/j.mfglet.2024.09.019","url":null,"abstract":"<div><div>In recent years, the pursuit of cutting-edge materials has intensified, with a focus on affordability, lightweight characteristics, and exceptional performance under high-temperature conditions, to serve as alternatives to Ni-base superalloys and other conventional alloys. Potential materials suitable for high-temperature structural applications with lightweight characteristics are intermetallics such as NiAl, and TiAl, but pose numerous fabrication challenges and poor ductility behaviour at room temperature. In view of this, a novel Ni<sub>25</sub>Al<sub>25</sub>Co<sub>15</sub>Fe<sub>15</sub> Mn<sub>8</sub>Ti<sub>7</sub>Cr<sub>5</sub> high entropy alloy (HEA) was fabricated using spark plasma sintering (SPS). The alloy was developed at a sintering temperature of 850 °C, a heating rate of 90 °C/min, a pressure of 50 MPa, and a dwelling time of 5 min. X-ray diffraction, scanning electron microscopy, and Vickers hardness tester were used to investigate the phase formation, microstructure, and mechanical properties of the HEA, respectively. The microstructure of the sintered HEA shows a homogenous dispersion of the alloying metals. The sintered microstructures showed a mixture of simple and complex phases. The grain size analysis shows that the sintered HEA exhibited a lower grain size of 2.28 µm and a refined crystallite size of 3.159 µm. The microhardness value and relative density of the sintered HEA are 135.8 HV and 99.56 %, respectively.</div></div>","PeriodicalId":38186,"journal":{"name":"Manufacturing Letters","volume":"41 ","pages":"Pages 153-159"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434349","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