Advances in Science and Technology Research Journal最新文献_第7页

Application of Coordinate Measuring Machines for Analysis of a Controlled Radius Based on Linear Regression 基于线性回归的受控半径分析中坐标测量机的应用

Advances in Science and Technology Research Journal Pub Date : 2024-04-01 DOI: 10.12913/22998624/182928

M. Magdziak

引用次数: 0

Investigations of the Effect of Heat Treatment and Plastic Deformation Parameters on the Formability and Microstructure of AZ91 Alloy Castings 热处理和塑性变形参数对 AZ91 合金铸件成型性和显微组织的影响研究

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/174932

Krzysztof Majerski, Ewa Siemionek, M. Szucki, Piotr Surdacki

{"title":"Investigations of the Effect of Heat Treatment and Plastic Deformation Parameters on the Formability and Microstructure of AZ91 Alloy Castings","authors":"Krzysztof Majerski, Ewa Siemionek, M. Szucki, Piotr Surdacki","doi":"10.12913/22998624/174932","DOIUrl":"https://doi.org/10.12913/22998624/174932","url":null,"abstract":"The article discusses the influence of heat treatment and metal forming parameters on formability and the structure of the AZ91 cast magnesium alloy. The aim of the article is to determine the optimal parameters of homogenization and plastic deformation of sand castings made of the AZ91 alloy in order to improve their properties and structure. In this study, sand castings made from the AZ91 alloy were examined. In the first stage, the castings were homog - enized at: 385 °C, 400 °C, 415 °C and 430 °C with argon as a shielding gas for 24 hours and then quenched. Sub-sequently the upsetting tests were conducted at 380 ° C; 400 ° C; 420 ° C; 440 ° C for two deformation values: ε = 0.7 and ε = 1.1. After upsetting, the samples were water-and air-cooled. At this stage, a visual assessment was made and samples without cracks were subjected supersaturation at 415 ° C for 6 h, and artificial aging at 175 ° C for 24 h. Vickers hardness tests and microstructure assessment were carried out, at individual stages of testing. Based on the results obtained from the upsetting, structure and hardness tests, the most favorable homogenisation and plastic deformation conditions were determined for AZ91 alloy sand castings. The best results are achieved by homogenizing sand castings at 415 °C for 24 h. Among the tested parameters for conducting metal forming processing in the range of 380–440 °C and deformation values: ε = 0.7 and ε = 1.1, forging of sand-cast AZ91 magnesium alloy at 420 °C and deformation of ε = 0.7 with water cooling seems to be the most favourable. The final heat treatment applied after the deformation process consists of supersaturation at 415 °C for 6 hours water quenching as artificial aging at 175 °C for 24. This combination of heat and plastic treatment parameters of castings allows for improvement of the structure and properties of sand castings made of the AZ91 alloy.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139896905","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

Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine 铣床双轴旋转工作台的创新设计和加工验证

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/178528

Wei-Zhu Lin, Jian-Xuan Xiao, Yung-Chih Lin, Bo-Wei Chang, Jui-Pin Hung

{"title":"Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine","authors":"Wei-Zhu Lin, Jian-Xuan Xiao, Yung-Chih Lin, Bo-Wei Chang, Jui-Pin Hung","doi":"10.12913/22998624/178528","DOIUrl":"https://doi.org/10.12913/22998624/178528","url":null,"abstract":"This study was aimed to develop a dual-axis rotary table for small and medium-sized five-axis milling machines. The rotation and tilting axis of swivel table were respectively driven by servo motor with gear reducer to achieve low speed, high torque, high rigidity and high precision machining capability. Essentially, the dynamic interaction between the workpiece and the cutter in the cutting process is an important factor that affects the machining performance, which also implies that the structural characteristics of the rotary table with the tilting angle will affect the cutting performance of the five-axis machine. Therefore, at the design stage of a five-axis machine tool, it is a prerequisite to evaluate change of dynamic characteristics of the rotary module within the desired feeding range. To this purpose, this study employed the finite element method to analyze the dynamic characteristics of the rotary table under different configurations. In order to evaluate the application feasibility of the dual-axis module on a milling machine, ISO S-shaped machining tests were carried out. Meanwhile, considering the influence of machining vibration on the surface quality of the work piece, the vibration induced at spindle tool and rotary table were assessed for comparisons and used to evaluate their variations with the milling cycles. Based on various experimental results, it is confirmed that the proposed dual-axis rotary table has good structural dynamic charac - teristics with stable vibration features during a small batch production tests. Current results clearly demonstrate the potential and capability of the proposed dual-axis rotary table in practical application and commercialization.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139897428","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

Abrasion Resistance of Nickel- and Iron-base Hardfacings 镍基和铁基硬质合金的耐磨性

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/175969

Tadeusz Hejwowski, D. Łukasik

引用次数: 0

Performance of a Cam-Type Pulse Continuously Variable Transmission 凸轮式脉冲无级变速器的性能

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/178176

Stanisław Pabiszczak

引用次数: 0

Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests 从循环加载试验中得出的 Chaboche 各向同性-机械硬化模型参数的计算鉴定方法

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/175930

Marta Wójcik, A. Gontarz, A. Skrzat, G. Winiarski

{"title":"Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests","authors":"Marta Wójcik, A. Gontarz, A. Skrzat, G. Winiarski","doi":"10.12913/22998624/175930","DOIUrl":"https://doi.org/10.12913/22998624/175930","url":null,"abstract":"The Chaboche-Lemaitre combined isotropic-kinematic hardening model (CKIH) gives an overall information about the material behaviour under cyclic loading. The identification of hardening parameters is a difficult and time-consuming problem. The procedure of the parameters identification using the experimental hysteresis curve obtained in a cyclic loading test under strain control is presented in details here for a S235JR construction steel. The last stabilized cycle extracted from the hysteresis curve is required for the identification of hardening parame - ters. The model with three backstresses is tested here. The optimization algorithm is also used for the improvement of the agreement between experimental and numerical data. In order to include some uncertainty of experiment and the identification procedure, the authorial algorithm written on the basis of the fuzzy logic soft-computing method is applied here. The results obtained show that the identification procedure presented in this paper ensures the good agreement between the experimental tests and numerical calculations. The correct selection of parameters associated with the hardening is essential for the right description of material behaviour subject to loading in different engineering problems, including in metal forming processes.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"266 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139894087","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

Performance and Emission of the Aircraft with Hybrid Propulsion During Take-Off Operation Cycle 采用混合推进系统的飞机在起飞运行周期内的性能和排放情况

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/177254

M. Pawlak, Michał Kuźniar

{"title":"Performance and Emission of the Aircraft with Hybrid Propulsion During Take-Off Operation Cycle","authors":"M. Pawlak, Michał Kuźniar","doi":"10.12913/22998624/177254","DOIUrl":"https://doi.org/10.12913/22998624/177254","url":null,"abstract":"The paper presents the energy consumption and emissions of pollutants in the exhausts during the take-off opera - tion mission of a Short Take-Off and Landing (STOL) aircraft equipped with a traditional and hybrid propulsion system. This research is part of the contemporary trend of research aimed at reducing the impact of aviation on the natural environment. The analyzed propulsion system consists of turbine engines and electric motors cooperating with them. In this work, on the basis of data from flight tests, the energy requirement for the aircraft to perform the intended mission was determined. On this basis, fuel consumption and the corresponding pollutant emissions were determined for an aircraft with a traditional power unit. For comparison, an aircraft with a hybrid propulsion system with the same mass as an aircraft with a traditional propulsion system was used. Then, energy consumption, fuel consumption and emission of CO 2 , CO, NO x , VOC, PM 10 and PM 2.5 were obtained for both aircraft variants. The most important results of the conducted research include a reduction in CO 2 emissions by 23% and NO x emissions by 46% in the case of the hybrid propulsion. This indicates potential benefits of using hybrid propulsion in aviation.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"2010 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139897136","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

Improves the Brake Working of the Rescue Winch to Control the Stop Brake Process 改进救援绞车的制动工作，控制停止制动过程

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/177662

Truong Giang Duong, Van Tinh Nguyen

引用次数: 0

The Influence of Printing Parameters on Leakage and Strength of Fused Deposition Modelling 3D Printed Parts 打印参数对熔融沉积建模三维打印部件泄漏和强度的影响

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/178330

M. Szczęch, Wojciech Sikora

{"title":"The Influence of Printing Parameters on Leakage and Strength of Fused Deposition Modelling 3D Printed Parts","authors":"M. Szczęch, Wojciech Sikora","doi":"10.12913/22998624/178330","DOIUrl":"https://doi.org/10.12913/22998624/178330","url":null,"abstract":"Fused deposition modelling (FDM) 3D printing technology has become popular for producing prototypes and final parts in various industries, including the automotive, aerospace, and medical sectors. The leakage of such components is often an important factor in determining their possible applications. This paper focuses on researching the influence of printing parameters on leakage and relating the results to the strength of parts produced using this tech - nology. The printing parameters considered were temperature and layer height. PLA (polylactic acid) was chosen as the material due to its biodegradability and biocompatibility. Leakage measurements were carried out using an empty cylinder-shaped vessel filled with air under pressure. The leakage value was observed as a pressure drop over time. It was shown that 3D-printed FDM vessels are not perfectly leak-proof, but the value of observed leakage may be acceptable for selected applications (leakage below 2.5 Pa/s). The results showed a high correlation between the height of the printed layer in both the leakage and strength of the tested samples, while reducing the height increased the tightness and strength of the 3D-printed parts. The effect of printing temperature was less significant.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"246 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139897658","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 the Extrusion Cavity Shape on the Ultimate Extrusion Force Value During Pellet Extrusion Through Multiple-Cavity Dies 通过多腔模挤压颗粒时挤压腔形状对最终挤压力值的影响

Advances in Science and Technology Research Journal Pub Date : 2024-02-01 DOI: 10.12913/22998624/177029

J. Górecki, Wiktor Łykowski, Maria Gumeni

{"title":"Influence of the Extrusion Cavity Shape on the Ultimate Extrusion Force Value During Pellet Extrusion Through Multiple-Cavity Dies","authors":"J. Górecki, Wiktor Łykowski, Maria Gumeni","doi":"10.12913/22998624/177029","DOIUrl":"https://doi.org/10.12913/22998624/177029","url":null,"abstract":"The article describes the results of experimental research that allowed us to compare the influence of the form - ing channel shape and its length on the limit value of the force occurring in the process of extruding crystallized carbon dioxide using multi-channel dies. To carry out the research, the authors adopted a method described in the literature, which allows for experimenting using a sublimating material under normal conditions, at a temperature of -78.4°C. Analysis of variance was used for the statistical analysis of the experiment results, which allowed to determine the level of statistical significance of differences between individual populations. Additionally, based on the median and regression values, an attempt was made to fit a function describing the change in the tested values as a function of geometric parameters. This allowed for comparison of the impact of individual variables. The authors did not observe the research results in the available literature, they would discuss the influence of the channel shape of multi-channel systems on the value of the confining force. Therefore, according to the authors, the presented results constitute an important supplement to the available knowledge.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"28 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139896939","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