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Mechanism Research and Discussion of the Quality of Precision Machining of a Fifth-order Variable-diameter Pipe Using Abrasive Flow 磨料流精密加工五阶变径管质量的机理研究与探讨
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-06-15 DOI: 10.5545/sv-jme.2020.6554
Junye Li, Wang Lixiong, Hengfu Zhang, Jinglei Hu, Xin-ming Zhang, Weihong Zhao
{"title":"Mechanism Research and Discussion of the Quality of Precision Machining of a Fifth-order Variable-diameter Pipe Using Abrasive Flow","authors":"Junye Li, Wang Lixiong, Hengfu Zhang, Jinglei Hu, Xin-ming Zhang, Weihong Zhao","doi":"10.5545/sv-jme.2020.6554","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6554","url":null,"abstract":"*Corr. Author’s Address: Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing, Changchun University of Science and Technology, Changchun 130022, China, fstving@163.com 358 Mechanism Research and Discussion of the Quality of Precision Machining of a Fifth-order Variable-diameter Pipe Using Abrasive Flow Li, J. – Wang, L. – Zhang, H. – Hu, J. – Zhang, X. – Zhao, W. Junye Li – Lixiong Wang – Hengfu Zhang – Jinglei Hu – Xinming Zhang* – Weihong Zhao Ministry of Education, Key Laboratory for Cross-Scale Microand Nano-Manufacturing, Changchun University of Science and Technology, China","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78865922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Influence of Local Porosity on the Mechanical Properties of Direct Metal Laser-Sintered 1.2709 Alloy 局部孔隙率对直接金属激光烧结1.2709合金力学性能的影响
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-06-15 DOI: 10.5545/sv-jme.2020.6573
I. Hatos, I. Fekete, D. Harangozó, H. Hargitai
{"title":"Influence of Local Porosity on the Mechanical Properties of Direct Metal Laser-Sintered 1.2709 Alloy","authors":"I. Hatos, I. Fekete, D. Harangozó, H. Hargitai","doi":"10.5545/sv-jme.2020.6573","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6573","url":null,"abstract":"Powder bed metal printing has demonstrated its potential for the direct manufacturing of complex parts. It has great flexibility compared to conventional manufacturing. There are also some difficulties and problems, e.g., because the process stops during production. When the process is restarted, the first layer may be thicker due to technological limitations. In this paper, the effects caused by the presence of these thicker layers were investigated. The possibility of re-melting the layers to reduce porosity were also analysed. A tool steel powder grade 1.2709 was used to produce samples with an increased thickness of melted layers.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74443005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Transient Feature Learning-Based Intelligent Fault Diagnosis Method for Planetary Gearboxes 基于瞬态特征学习的行星齿轮箱智能故障诊断方法
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-06-15 DOI: 10.5545/sv-jme.2020.6546
Qin Bo, Zixian Li, Yan Qin
{"title":"A Transient Feature Learning-Based Intelligent Fault Diagnosis Method for Planetary Gearboxes","authors":"Qin Bo, Zixian Li, Yan Qin","doi":"10.5545/sv-jme.2020.6546","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6546","url":null,"abstract":"Sensitive and accurate fault features from the vibration signals of planetary gearboxes are essential for fault diagnosis, in which extreme learning machine (ELM) techniques have been widely adopted. To increase the sensitivity of extracted features fed in ELM, a novel feature extraction method is put forward, which takes advantage of the transient dynamics and the reconstructed high-dimensional data from the original vibration signal. First, based on fast kurtosis analysis, the range of transient dynamics of a vibration signal is located. Next, with the extracted kurtosis information, with variational mode decomposition, a series of intrinsic mode functions are decomposed; the ones that fall into the obtained ranges are selected as transient features, corresponding to maximum kurtosis value. Fed by the transient features, a hierarchical ELM model is well-trained for fault classification. Furthermore, a denoising auto-encoder is used to optimize input weight and threshold of implicit learning node of ELM, satisfying orthogonal condition to realize the layering of its hidden layers. Finally, a numerical case and an experiment are conducted to verify the performance of the proposed method. In comparison with its counterparts, the proposed method has a better classification accuracy in the aiding of transient features.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82913106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Peak Temperature Correlation and Temperature Distribution during Joining of AZ80A Mg Alloy by FSW – A Numerical and Experimental Investigation FSW焊接AZ80A镁合金过程中峰值温度相关性及温度分布——数值与实验研究
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-06-15 DOI: 10.5545/sv-jme.2020.6566
P. Sevvel, S. Babu, R. S. Kumar
{"title":"Peak Temperature Correlation and Temperature Distribution during Joining of AZ80A Mg Alloy by FSW – A Numerical and Experimental Investigation","authors":"P. Sevvel, S. Babu, R. S. Kumar","doi":"10.5545/sv-jme.2020.6566","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6566","url":null,"abstract":"A quadratic equation has been developed based on experimental measurements to estimate the peak temperature in the FSW process during the joining of AZ80A Mg alloys. The numerical simulation of the FSW process was performed by employing COMSOL software to predict & calculate the distribution of temperature on the various regions of the parent metal and the welded joints. The predicted and FEA simulated results of the distribution of peak temperatures were found to be consistent with the experimental values. In addition to this, a parametric experimental investigation was conducted to identify the most influential process parameter which plays a significant role in the peak temperature distribution during FSW of AZ80A Mg alloy. Linear contributions by the input process parameters of FSW namely, traversing speed, rotating tool speed & axial force on the peak temperature were observed to be 32.82%, 23.58% and 21.76% respectively.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84232666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Research on a Path-Tracking Control System for Articulated Tracked Vehicles 铰接式履带车辆路径跟踪控制系统研究
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-05-20 DOI: 10.5545/sv-jme.2019.6463
Da Cui, Guoqiang Wang, Zhao Huanyu, Wang Shuai
{"title":"Research on a Path-Tracking Control System for Articulated Tracked Vehicles","authors":"Da Cui, Guoqiang Wang, Zhao Huanyu, Wang Shuai","doi":"10.5545/sv-jme.2019.6463","DOIUrl":"https://doi.org/10.5545/sv-jme.2019.6463","url":null,"abstract":"To achieve path-tracking control of articulated tracked vehicles (ATVs), a control system is designed according to the structural characteristics of the ATVs. The distance deviation and heading angle deviation between the vehicle and the pre-set trajectory are employed as input variables to the controller to control the relative deflection angle of the hinge of the vehicle and the velocity of the sprockets and realize the function of the path tracking control. The effects of two control algorithms are simulated with a RecurDyn/Simulink co-simulation; the results show that the fuzzy proportional-integral-derivative (PID) has a better control effect and precision when compared with the PID method. To verify the effect of the proposed controller, a scaled model test platform that is based on visual navigation is developed. Physical experiments were conducted to show the efficacy of the proposed path-tracking control system, which can effectively track the pre-set trajectory and achieve an optimal control outcome.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79185694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Application of the Thin Slice Model for Determination of Face Load Distribution along the Line of Contact and the Relative Load Distribution Measured along Gear Root 薄片模型在确定接触面载荷沿接触线分布和沿齿轮根相对载荷分布中的应用
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-05-20 DOI: 10.5545/sv-jme.2020.6555
Wiktor Kamycki, S. Noga
{"title":"Application of the Thin Slice Model for Determination of Face Load Distribution along the Line of Contact and the Relative Load Distribution Measured along Gear Root","authors":"Wiktor Kamycki, S. Noga","doi":"10.5545/sv-jme.2020.6555","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6555","url":null,"abstract":"*Corr. Author’s Address: Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, Al. Powstańców Warszawy 12, 35-629 Rzeszów, Poland, wiktor.kamycki@gmail.com 300 Application of the Thin Slice Model for Determination of Face Load Distribution along the Line of Contact and the Relative Load Distribution Measured along Gear Root Kamycki, W. – Noga, S. Wiktor Kamycki* – Stanisław Noga Rzeszów University of Technology, Faculty of Mechanical Engineering and Aeronautics, Poland","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86727541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Preliminary Comparison of the Performance of Thermodynamic Models of the Subsonic Ejector and Turbofan 亚音速喷射器与涡扇热力学模型性能的初步比较
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-05-20 DOI: 10.5545/sv-jme.2019.6379
V. Martinaitis, Dovydas Rimdžius, Juozas Bielskus, Giedrė Streckienė, Violeta Motuzienė
{"title":"Preliminary Comparison of the Performance of Thermodynamic Models of the Subsonic Ejector and Turbofan","authors":"V. Martinaitis, Dovydas Rimdžius, Juozas Bielskus, Giedrė Streckienė, Violeta Motuzienė","doi":"10.5545/sv-jme.2019.6379","DOIUrl":"https://doi.org/10.5545/sv-jme.2019.6379","url":null,"abstract":"Flow-mixing is common in technological processes, and both ejectors and turbofans can produce an interaction between flows with different energy potentials. Ejectors have been extensively used, and their analytical models have been widely presented. To the best of the authors’ knowledge, there is a lack of studies exploring the efficiencies of turbofans. The goal of this paper is to compare thermodynamic processes in these devices. Their efficiencies are compared in terms of compression and entrainment ratios. A comprehensive one-dimensional subsonic thermodynamic models of the ejector and turbofan are presented. The quantitative indices are obtained for the same initial conditions expressed as the ratio of differences in enthalpies for ideal compression and ideal expansion. When initial conditions are equal to the numeric value of the combination of the isentropic efficiency of the evaluated components (numerical case 0.16), both devices have the same efficiencies; at lower initial conditions (numerical case 0.10), a turbofan’s entrainment ratio is 1.5 times and compression efficiency 1.25 times higher; at higher values of initial conditions (numerical case 0.28), the ejector is more efficient. Such distinctive characteristics of turbofans and the nature of their variation may correspond to the specific application areas of technological equipment that require certain flow-mixing parameters.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83011394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on the Influence of Metallic Powder in Near-Dry Electric Discharge Machining 金属粉末对近干电火花加工影响的研究
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-04-15 DOI: 10.5545/sv-jme.2019.6475
S. Sundriyal, Vipin, R. S. Walia
{"title":"Study on the Influence of Metallic Powder in Near-Dry Electric Discharge Machining","authors":"S. Sundriyal, Vipin, R. S. Walia","doi":"10.5545/sv-jme.2019.6475","DOIUrl":"https://doi.org/10.5545/sv-jme.2019.6475","url":null,"abstract":"Near-dry electrical discharge machining (ND-EDM) is an eco-friendly process. In this study, an approach has been made to make the machining process more efficient than ND-EDM with the addition of metallic powder with the dielectric medium to machine EN-31 die steel. Powdermixed near-dry EDM (PMND-EDM) has several advantages over the ND-EDM or conventional electrical discharge machining (EDM) process, such as a higher material removal rate (MRR), fine surface finish (Ra), sharp cutting edge, lesser recast layer, and lower deposition of debris. The output response variables are MRR, Ra, residual stress (RS) and micro-hardness (MH) of the machined surfaces. Further study of the workpiece was performed, and a comparative study was conducted between ND-EDM and PMND-EDM. In this proposed method of machining, the MRR, Ra, and MH increased by 17.85 %, 16.36 %, and 62.69 % while RS was reduced by 56.09 %.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88113917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Internal Friction of Ball Bearings at Very Low Temperatures 极低温下球轴承的内摩擦
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-04-15 DOI: 10.5545/sv-jme.2019.6398
J. Sikorski, W. Pawłowski
{"title":"Internal Friction of Ball Bearings at Very Low Temperatures","authors":"J. Sikorski, W. Pawłowski","doi":"10.5545/sv-jme.2019.6398","DOIUrl":"https://doi.org/10.5545/sv-jme.2019.6398","url":null,"abstract":"Results of the study on the internal friction of steel ball bearings made of X65Cr14 alloy and ceramic bearings made of zirconium oxide operating at temperatures lowered by liquid nitrogen down to –195 °C are presented in this paper. Standard grease added by the manufacturer, while graphite and molybdenum disulphide powder were used for lubrication of the bearings during the measurements. Tests were also carried out to examine the performance of the bearings operating without lubrication. The power of bearing internal friction versus temperature was measured. The lowest bearing internal friction was observed for molybdenum disulphide, whose effective lubricating performance was verified for both types of ball bearings. Graphite powder was almost equally effective with the advantage of being suitable for use in machines that come into contact with food.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80270518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift 大扬程垂直升船机机-液-结构-流体耦合系统纵摇稳定性分析
IF 1.7 4区 工程技术
Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-04-15 DOI: 10.5545/sv-jme.2019.6467
Yang Zhang, Duanwei Shi, Tong Xiao, Ji Zhou, Xionghao Cheng
{"title":"Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift","authors":"Yang Zhang, Duanwei Shi, Tong Xiao, Ji Zhou, Xionghao Cheng","doi":"10.5545/sv-jme.2019.6467","DOIUrl":"https://doi.org/10.5545/sv-jme.2019.6467","url":null,"abstract":"*Corr. Author’s Address: School of Power and Mechanical Engineering, Wuhan University, Wuhan, China, dwshi@whu.edu.cn 266 Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift Zhang, Y. – Shi, D.W. – Xiao, T. – Zhou, J. – Cheng, X.H. Yang Zhang1,2 – Duanwei Shi1,2,* – Tong Xiao2 – Ji Zhou2 – Xionghao Cheng2 1Wuhan University, Key Laboratory of Hydraulic Machinery Transients, China 2Wuhan University, School of Power and Mechanical Engineering, China","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86042882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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