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MODEL FOR PREDICTING THE RESULTS OF TENSILE TEST WITH STRAIN RATE DEPENDENT PLASTICITY AND THE STRAIN DISTRIBUTION AT THE END OF THE STRAIN PROCESS 应变率相关塑性拉伸试验结果预测模型及应变过程结束时的应变分布
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023007
JOZEF KMEC, JOZEF PAVELKA, JAROSLAV SOLTES
{"title":"MODEL FOR PREDICTING THE RESULTS OF TENSILE TEST WITH STRAIN RATE DEPENDENT PLASTICITY AND THE STRAIN DISTRIBUTION AT THE END OF THE STRAIN PROCESS","authors":"JOZEF KMEC, JOZEF PAVELKA, JAROSLAV SOLTES","doi":"10.17973/mmsj.2023_10_2023007","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023007","url":null,"abstract":"In this article, the attention was focused on the possibilities of determining material properties (at the reference strain rate), which are obtained from the experiment using a suitable material model, Curve fitting toolbox, custom-made software (Matlab computing core), which are necessary for the results prediction of the tensile test with plasticity depending on the rate of deformation or for the strain distribution at the end of the strain process in material samples.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547287","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
PAYBACK CALCULATION REFINEMENT OF INDUSTRIAL ROBOT APPLICATIONS 工业机器人投资回报计算精细化应用
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023077
DAVID ZENISEK, TOMAS BROUM, MICHAL SIMON
{"title":"PAYBACK CALCULATION REFINEMENT OF INDUSTRIAL ROBOT APPLICATIONS","authors":"DAVID ZENISEK, TOMAS BROUM, MICHAL SIMON","doi":"10.17973/mmsj.2023_10_2023077","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023077","url":null,"abstract":"The paper focuses on describing and applying a refined method of investment payback calculation related to industrial robot applications. Industrial robots play an important role in modern manufacturing companies, therefore it is important to precisely determine the investment payback of robot applications. In the first part of the paper, we introduce payback calculation theory in general and the current approaches to payback calculation of robot applications in practice. Subsequently, we point out that current approaches seem insufficient due to tracking only a limited number of costs and savings. Subsequently, we attempt to identify all identifiable costs and savings related to robotic applications, then we present a refined method to determine the payback of robot applications more precisely. The method is then applied in a case study performed in an industrial enterprise. Finally, we evaluate how significantly this refined method differs from the calculation used in practice and these findings are summarised.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547428","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
THERMO-MECHANICAL PROPERTIES OF ABS MATRIX COMPOSITE FILAMENT REINFORCED WITH MULTI-LAYER GRAPHITE OXIDE COMPOSITE FIBERS FOR FDM 3D PRINTING FDM 3d打印用多层氧化石墨复合纤维增强abs基复合长丝的热力学性能
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023054
THANH-DUNG DO, MINH-THUYET NGUYEN, THAI-HUNG LE
{"title":"THERMO-MECHANICAL PROPERTIES OF ABS MATRIX COMPOSITE FILAMENT REINFORCED WITH MULTI-LAYER GRAPHITE OXIDE COMPOSITE FIBERS FOR FDM 3D PRINTING","authors":"THANH-DUNG DO, MINH-THUYET NGUYEN, THAI-HUNG LE","doi":"10.17973/mmsj.2023_10_2023054","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023054","url":null,"abstract":"The properties of plastic filaments have an essential role in the printability and properties of printed products made by 3D printing FDM. Therefore, graphite oxides reinforced ABS plastic filament were fabricated to investigate the properties change for the purpose of improving the properties of products printed from ABS plastic. Graphite oxides reinforced ABS plastic filament with 1 %, 3 % and 5 % content, respectively, was fabricated and tested for mechanical properties, printability, and printing temperature, which showed some changes in properties compared to original ABS plastic filaments.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547433","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
WAYS OF CREATING NC PROGRAMS 创建nc程序的方法
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023015
ANTON PANDA, PATRIK SOROCIN, PETER MICHALIK
{"title":"WAYS OF CREATING NC PROGRAMS","authors":"ANTON PANDA, PATRIK SOROCIN, PETER MICHALIK","doi":"10.17973/mmsj.2023_10_2023015","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023015","url":null,"abstract":"This article comprises several sections that analyze the NC program designed for machine tools. The first section focuses on characterizing the program and highlights the differences between external and internal programming. In the subsequent section, the program's structure specifically tailored for the Fanuc control system is described. It delineates the distribution of words within individual commands, elucidates their structure, and expounds on their significance. Additionally, it elucidates the interpretation of individual addresses, preparatory functions, and auxiliary functions. The final section describes programming methods and provides a concise characterization of each.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547435","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
INFLUENCE OF FUEL COMPONENTS ON COMBUSTION PROCESS OF HOMOGENEOUS FUEL MIXTURE IN THE HCCI ENGINE 燃料组分对hcci发动机均质燃料混合气燃烧过程的影响
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023072
MATUS LAVCAK, MICHAL PUSKAR, MARIETA SOLTESOVA, MELICHAR KOPAS
{"title":"INFLUENCE OF FUEL COMPONENTS ON COMBUSTION PROCESS OF HOMOGENEOUS FUEL MIXTURE IN THE HCCI ENGINE","authors":"MATUS LAVCAK, MICHAL PUSKAR, MARIETA SOLTESOVA, MELICHAR KOPAS","doi":"10.17973/mmsj.2023_10_2023072","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023072","url":null,"abstract":"Nowadays, the research and development activities performed in the area of internal combustion engines are focused on the LTC technologies, especially on the HCCI technology. It is so because these innovative technologies are characterized by high operational efficiency as well as by low emissions of nitrogen oxides (NOX) and particulate matter (PM). The combustion process LTC is able to utilize various fuels. The kind of fuel, together with its physical and chemical properties have a major influence on engine power output and gaseous emissions. The presented scientific contribution deals with analysis of an experimental engine operating with the HCCI combustion, specifically it deals with operational influences of several selected fuel mixtures. There is investigated an influence of the fuel mixtures, which consist of different components with various properties, on the engine power output and on the gaseous emissions. These experimentally applied fuels were created as the mixtures of isooctane and n-heptane using different mixing ratios. The obtained results offer a global view on a real effect of the fuel components applied in the fuel mixtures.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547432","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
INVESTIGATION OF THE FABRICATION PROCESS OF METAL 3D PRINTED POWDER BY MOLTEN ALLOY DISPERSION METHOD USING CENTRIFUGATION AND HIGH-PRESSURE GAS 采用离心分离法和高压气体制备金属3d打印粉末的工艺研究
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023059
DOAN VAN PHUC, VU VAN QUANG, DINH VAN DUY
{"title":"INVESTIGATION OF THE FABRICATION PROCESS OF METAL 3D PRINTED POWDER BY MOLTEN ALLOY DISPERSION METHOD USING CENTRIFUGATION AND HIGH-PRESSURE GAS","authors":"DOAN VAN PHUC, VU VAN QUANG, DINH VAN DUY","doi":"10.17973/mmsj.2023_10_2023059","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023059","url":null,"abstract":"Atomization using centrifugation and high-pressure gas is considered to be a relatively new method of producing metal 3D printing powders. The metal powder made by this method is expected to obtain an adequate small-scaled size with the limitation of satellites stuck to the surface due to the reduction of the gas flow in the dispersion chamber. This work conducted experimental studies with aluminum alloy graded of AlSi10Mg. The particle size distribution of the fabricated metal powder after fabrication was evaluated using standard sieves and the laser diffraction method. In addition, the morphological structure of metal powder particles was examined by scanning electron microscopy method. The investigation results have determined the influence of geometrical and technological parameters of the atomization process, including liquid metal flow, liquid metal overheating, and some structural parameters of equipment on the quantity and quality of the product.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547434","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
DEVELOPMENT OF SMART DISINFECTION MACHINE USING IOT TECHNOLOGY 利用物联网技术开发智能消毒机
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023057
TRUONG DUC PHUC, TRAN VAN THANH, LE TIEN CUONG, NGUYEN HOANG VU, DANG TRAN BACH
{"title":"DEVELOPMENT OF SMART DISINFECTION MACHINE USING IOT TECHNOLOGY","authors":"TRUONG DUC PHUC, TRAN VAN THANH, LE TIEN CUONG, NGUYEN HOANG VU, DANG TRAN BACH","doi":"10.17973/mmsj.2023_10_2023057","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023057","url":null,"abstract":"In this study, the authors developed a smart, high power of disinfection machine using IoT technology. This disinfection machine generates super fine fog from H2O2 solution by utilizing pressure-swirl airblast atomizer. This machine sprays the H2O2 fog into the air inside the operating room in hospitals to disinfect and make the environment clean. The operation of the disinfection machine is totally remote controlled via mobile application using Bluetooh Low Energy (BLE) communication technology. All operating parameters are remotely, real time monitored and controlled. In addition, the machine operation history of are fully collected and stored both on a memory card in control circuit board and on cloud database. Furthermore, the heat generation from the integrated circuits (ICs) or chip and electronic components on the control printed circuit board (PCB) is also studied in order to prevent the overheating of the components which cause malfunction or instability of the machine. The results show that the temperature of all the electronic components on the control PCB during working is within the temperature allowance, and the disinfection machine works well.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135548339","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: 1
TESTING OF TRANSFER SIGNAL QUALITY OF RF-BASED SYSTEM 基于射频系统的传输信号质量测试
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023011
PATRIK SARGA, ROBERT RAKAY, ALENA GALAJDOVA
{"title":"TESTING OF TRANSFER SIGNAL QUALITY OF RF-BASED SYSTEM","authors":"PATRIK SARGA, ROBERT RAKAY, ALENA GALAJDOVA","doi":"10.17973/mmsj.2023_10_2023011","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023011","url":null,"abstract":"The article deals with the creation of an IoT system based on the Hardwario platform. In the first part, the options for signal transmission were analyzed. The selected and tested system utilizes radio frequency signal propagation at 868 MHz. Signal quality was tested in indoor and outdoor conditions, where the reliability of the proposed solution was verified. Systems built on the proposed solution can be used for remote monitoring of desired parameters on a sufficiently large area.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547422","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 FATIGUE OF HIGHLY FORMED BODIES 高度成形的身体的疲劳
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023039
JAROMIR KASPAR, PETR BERNARDIN, VACLAVA LASOVA
{"title":"THE FATIGUE OF HIGHLY FORMED BODIES","authors":"JAROMIR KASPAR, PETR BERNARDIN, VACLAVA LASOVA","doi":"10.17973/mmsj.2023_10_2023039","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023039","url":null,"abstract":"Fatigue of cold formed parts is an important consideration especially in the automotive industry. Methods exist for predicting the fatigue of parts where the plastic deformation during forming is less than the uniform elongation. Nevertheless, many stamped parts include areas where forming strain exceeds uniform elongation. These areas are also very important in terms of high cyclic fatigue. Fatigue tests were carried out on these highly formed bodies. The results are presented in this paper. Also, a simple method is proposed for avoiding some common mistakes in fatigue evaluation.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547425","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: 1
AUTONOMOUS MOBILE ROBOT PATH PLANNING BASED ON ENHANCED A* ALGORITHM INTEGRATING WITH TIME ELASTIC BAND 基于时间弹性带增强a *算法的自主移动机器人路径规划
MM Science Journal Pub Date : 2023-10-04 DOI: 10.17973/mmsj.2023_10_2023052
THAI-VIET DANG
{"title":"AUTONOMOUS MOBILE ROBOT PATH PLANNING BASED ON ENHANCED A* ALGORITHM INTEGRATING WITH TIME ELASTIC BAND","authors":"THAI-VIET DANG","doi":"10.17973/mmsj.2023_10_2023052","DOIUrl":"https://doi.org/10.17973/mmsj.2023_10_2023052","url":null,"abstract":"Path planning is the core technology to realize mobile robot navigation. The enhanced A* algorithm with a time elastic band method (TEB) is utilized to aim at the collision problem in a complex environment. A grid-based method transfers the complex environment to a simple grid-based map. The mobile robot's position is determined based on information from the given maps. Optimizing the search point strategy and removing redundant path points reduces the path length and computational scale. The approach yields a safe trajectory in the local path using a time elastic band. The collision cost function combined with the preview deviation angle tracking method ensures the minimum collision-free distance to obstacles and the shortest path. Furthermore, the third-degree B-spline curve will improve the performance of the mobile robot path at the steering angles. Simulated results illustrate the correctness of the proposed method.","PeriodicalId":18723,"journal":{"name":"MM Science Journal","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547427","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
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