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Educational Model Layout Design 教学模型布置图设计
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2022.022
Maksym Danyliuk
{"title":"Educational Model Layout Design","authors":"Maksym Danyliuk","doi":"10.21496/ams.2022.022","DOIUrl":"https://doi.org/10.21496/ams.2022.022","url":null,"abstract":": The article deals with the design of an educational training device for solving control systems for regulating the water level in the reservoir. The system allows several options for operation with different control algorithms. The device can be connected to the control system for practical training activities in the educational process.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121964029","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
Modelling the Heat Loss of a Building 模拟建筑物的热损失
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2022.021
Davide Rigo, M. Velička
{"title":"Modelling the Heat Loss of a Building","authors":"Davide Rigo, M. Velička","doi":"10.21496/ams.2022.021","DOIUrl":"https://doi.org/10.21496/ams.2022.021","url":null,"abstract":": The aim of this paper is to calculate the heat loss and annual energy demand for heating of an administrative building for three variants of thermal-technical design and their evaluation. The heat losses were determined according to the legislation in force and in accordance with the normative requirements. The calculations made can be used in the next phase for the design of the heat source and heating system for heating and for the design of forced ventilation with heat recovery. Based on the optimum choice of technical equipment, it is also possible to evaluate the investment and operating costs for the installation of the different heating and ventilation concepts. Given the current significant increase in energy prices, the present topic is very topical.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128029074","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
Application of Quality Tools in Solving a Production Problem 质量工具在解决生产问题中的应用
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2022.009
Š. Markulík, Róbert Kozel, Maroš Begáni, Katarina Vaskovicova, Tomas Gazda, Ján Kán
{"title":"Application of Quality Tools in Solving a Production Problem","authors":"Š. Markulík, Róbert Kozel, Maroš Begáni, Katarina Vaskovicova, Tomas Gazda, Ján Kán","doi":"10.21496/ams.2022.009","DOIUrl":"https://doi.org/10.21496/ams.2022.009","url":null,"abstract":": The article focuses on the issue of automotive products. The product is a component necessary for the proper functioning of the engine in a car. The application of various quality tools represents the identification and subsequent elimination of defects to improve the manufacturing process. The aim was to reduce the proportion of complaints related to product malfunction and to increase the overall control of the manufacturing process. This includes activities such as identification, analysis, and elimination of the root cause of the claimed product function. Standard tools used to identify and analyse the root cause of the problem such as Ishikawa, Pareto, 4Wh1 were used. It usually focuses on inventory reduction, machine optimization, process synchronization. In addition to basic quality tools, process capability or microscopic analyses were also used. The system quality management tool of auditing was also used. The root cause of the problem was identified. Measures were subsequently taken and savings of more than EUR 50,000 were achieved.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122797437","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
Characterization of Machined Surfaces of Al-based Automotive Alloys with Different Levels of Si Content under Up Milling and Down Milling Operation 上铣削和下铣削下不同Si含量铝基汽车合金加工表面的表征
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2022.008
Salman Ahammed, Asif Razin, Maglub Al-Nur, S. Kaiser
{"title":"Characterization of Machined Surfaces of Al-based Automotive Alloys with Different Levels of Si Content under Up Milling and Down Milling Operation","authors":"Salman Ahammed, Asif Razin, Maglub Al-Nur, S. Kaiser","doi":"10.21496/ams.2022.008","DOIUrl":"https://doi.org/10.21496/ams.2022.008","url":null,"abstract":": This paper aims to investigate and compare the characteristics of machined surfaces and chips formation of aluminium-based automotive alloys with varying silicon content. The milling operations are performed using horizontal milling machine under two peripheral up milling and down milling methods with an HSS slab milling cutter. The experiment has conducted for different cutting speeds in dry condition while the depth of cut and machining feed are kept constant throughout the evaluation. The study reveals that the down-milled surface has higher hardness and better surface finish resulting in lower roughness as the cutting force is compressive in nature. On the contrary, the up-milled surface has lower hardness and micro cracks on it, which resulted in relatively higher surface roughness as the cutting force is tensile shear in nature. In addition, the surface hardness increases with the increment of silicon content in the alloys for both milling methods for the presence of hard Si rich intermetallics. The chips produced during up milling are shorter whereas the chips produced during down milling are longer for creation of higher temperature and pressure. Higher Si added alloy shows the curly like chips for its lower elongation behaviour. Fracture behaviour of higher Si alloy also confirms crack propagation obtained by the massive cleavage of the brittle and plate-types Si rich intermetallics.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"164 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127529092","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
Analytical Analysis of a Pillar Crane for Handling of Sludge Pumps Breakdown 柱式起重机处理污泥泵故障的分析分析
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2022.005
M. Blatnický, M. Brezani, J. Dižo
{"title":"Analytical Analysis of a Pillar Crane for Handling of Sludge Pumps Breakdown","authors":"M. Blatnický, M. Brezani, J. Dižo","doi":"10.21496/ams.2022.005","DOIUrl":"https://doi.org/10.21496/ams.2022.005","url":null,"abstract":": The article presents a technical description of a boom for handling sludge pumps. It is used in an object No. 900, a block V2 of the nuclear power plant in Jaslovské Bohunice. It is an object of a chemical water treatment plant belonging to the block V2. The boom is used at regular inspections of sludge pumps type 80 KD F150 9.5-A0-03 and for the needed handling with them during their operation. The boom of sludge pump designed for a load capacity of 120 kg was damaged during operation because the consequence of work the sludge pump was not considered during its design. This was causing a gradual accumulation of sludge around the suction openings of the pump. Therefore, the pump sometimes adhered to the bottom of the tank. In order to lift the pump thus adhered, it was subsequently necessary to apply approximately the four-times greater tensile force, for which the boom was no longer dimensioned. Therefore, it is important to optimize that state.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121281546","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
Use of Duplex PVD Coatings to Increase the Life of Moulds and Cores for die Casting of Aluminium Alloys in the Automotive Industry 使用双相PVD涂层提高汽车工业铝合金压铸模具和芯的寿命
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2022.003
J. Brezinová, J. Viňáš, M. Džupon, D. Jakubéczyová, J. Březina, Henrich Sailer, J. Hašuľ, Michal Považan
{"title":"Use of Duplex PVD Coatings to Increase the Life of Moulds and Cores for die Casting of Aluminium Alloys in the Automotive Industry","authors":"J. Brezinová, J. Viňáš, M. Džupon, D. Jakubéczyová, J. Březina, Henrich Sailer, J. Hašuľ, Michal Považan","doi":"10.21496/ams.2022.003","DOIUrl":"https://doi.org/10.21496/ams.2022.003","url":null,"abstract":": The paper presents the results of research aimed at increasing the life of moulds and cores for high-pressure aluminium casting. The castings produced are intended for the automotive industry. Local impulse heating was applied to the surface of the base material of the Uddeholm Dievar moulds. Three heating rates were used. After surface treatment, structural analysis was performed. PVD coating nACRo 3 was applied to the surface treated in this way. Coating deposition was performed by Larc technology. The quality of the coating was evaluated on the basis of the Scratch test and the Mercedes test. After laser treatment of the material surface and application of nACRo 3 coating, the surface microgeometry was evaluated according to ISO 25 178. The coated surface was then immersed in an Al – Si-based alloy melt at a temperature of 680 ± 20°C and remaining in the melt for 120 and 300 min. Experimental work has confirmed that the resistance of the mould surface has significantly increased.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128047608","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
Comparison of Simulated Machining Time with Real Machining Time at Free-form Surfaces Milling 自由曲面铣削模拟加工时间与实际加工时间的比较
Acta Mechanica Slovaca Pub Date : 2022-03-01 DOI: 10.21496/ams.2021.036
Zuzana Grešová, Peter Ižol
{"title":"Comparison of Simulated Machining Time with Real Machining Time at Free-form Surfaces Milling","authors":"Zuzana Grešová, Peter Ižol","doi":"10.21496/ams.2021.036","DOIUrl":"https://doi.org/10.21496/ams.2021.036","url":null,"abstract":": The presented results are part of more extensive experiments, which aim to verify the reliability of the results provided by CAM systems in the production of parts with shaped surfaces. The article deals with the comparison of production times obtained from programming and simulation systems with real production times. For production planning and organization processes, information on estimated production time is an important input. A free-form sample was designed for the experiment. Finishing of the sample surfaces was accomplished by 3-axis and 5-axis milling using three different strategies. The machining times obtained by the simulation in the CAM system, the times from the simulation mode of the machine control system and the real machining times were evaluated. Data discrepancies were shown, with in almost all cases the real machining times being longer than the times given by the simulations. The results were supplemented by outputs from software that optimizes the feed during milling thus reducing the production time. The tests proved the validity of its use.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131480122","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
Tribological Characterization of Electrolytic Hard Chrome Coatings 电解硬铬涂层的摩擦学特性
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2021.021
M. Eckert
{"title":"Tribological Characterization of Electrolytic Hard Chrome Coatings","authors":"M. Eckert","doi":"10.21496/ams.2021.021","DOIUrl":"https://doi.org/10.21496/ams.2021.021","url":null,"abstract":"Electrochemical chromium plating is one of the most widely used surface treatments for metallic materials. This treatment results in a surface layer highly resistant to mechanical wear, temperature and corrosion. In this paper, the experimental material is in the form of a tube made of AISI 304 stainless steel, on the surface of which chromium layers have been deposited by three different companies dealing with electrochemical plating. Tribological tests were performed on a UMT Tribolab device with dry friction of balls made of AISI 52100 steel and ZrO 2 ceramics, both with a diameter of 4.762 mm. Measurements were performed at different loads. In the experiments, the courses of friction coefficients were evaluated, and after the measurement, the amount of material removed during friction was determined from the cross-sections of the formed grooves. Furthermore, the influence of the hardness of individual chromium layers and counterparts on tribological behaviour was investigated. The hardness of the counterpart proved to be important, since in the case where the counterpart is softer than the surface layer, the wear was greater than in the opposite situation.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127619381","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
Propane Gas Thermoelectric Generator with Microcontroller Integrated Development Environment Hot Side Temperature Control 基于单片机集成开发环境的丙烷燃气热电发电机热侧温度控制
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2022.004
F. Onoroh, Adeyinka Abdulquadri Oluwo, L. O. Agberegha
{"title":"Propane Gas Thermoelectric Generator with Microcontroller Integrated Development Environment Hot Side Temperature Control","authors":"F. Onoroh, Adeyinka Abdulquadri Oluwo, L. O. Agberegha","doi":"10.21496/ams.2022.004","DOIUrl":"https://doi.org/10.21496/ams.2022.004","url":null,"abstract":"A thermoelectric generator consists of various thermocouples arranged in series. A voltage is generated when a temperature gradient exists across the junctions of the thermocouples. This research modelled, developed and tested a thermoelectric generator with hot side temperature control using propane gas, in a microcontroller integrated development environment to protect the modules from excessive high temperatures. The models were solved using MATLAB for pictorial representation of the performance of the generator with temperature gradient, hot and cold side temperatures. The thermoelectric generator was developed using ten SP-184827145-SA modules. The temperature control circuitry consists of an ATMEGA32 microcontroller, DS18B30 temperature sensors, stepper motor, computer interface and power supply unit whose sole aim is to regulate the gas supply and hence control the flame temperature. The maximum open circuit voltage gotten was 25 V at 300 secs with hot side temperature of 120°C and cold side temperature 30°C, with an efficiency of 3.6%. It was also found out that the higher the temperature gradient the higher the voltage produced.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122052948","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 Effect of Montmorillonite on the Thermal Properties of Polyvinylpyrrolidone 蒙脱土对聚乙烯吡咯烷酮热性能影响的研究
Acta Mechanica Slovaca Pub Date : 2021-12-16 DOI: 10.21496/ams.2022.001
V. Krasinskyi, Solomiia Onysko
{"title":"Investigation of the Effect of Montmorillonite on the Thermal Properties of Polyvinylpyrrolidone","authors":"V. Krasinskyi, Solomiia Onysko","doi":"10.21496/ams.2022.001","DOIUrl":"https://doi.org/10.21496/ams.2022.001","url":null,"abstract":"The influence of montmorillonite (MMT) on the thermal properties of polyvinylpyrrolidone (PVP) was studied by differential thermal and thermogravimetric analyses. It was found that the samples of the montmorillonite-polyvinylpyrrolidone mixture are characterized by higher thermal stability than the sample of pure PVP. It is shown that the degree of increase in the temperature of the beginning of destruction depends on the ratio of the mixture's components. It was found that the composition MMT:PVP = 1:7 has the highest heat resistance (260 °C), while pure PVP begins to degrade at a temperature of 200 °C.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122984504","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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