Anna Mičietová, Miroslav Neslušan, Zuzana Florková, Mária Čilliková
This paper analyses surface after laser beam machining with respect of surface height irregularities, residual stress state as well as microstructure on the low alloyed steel S 235. Surface after laser beam machining is investigated due to its specific nature resulting into coating delamination. This coating delamination can be found especially in the regions in which component shape or/and curvature of the profile is altered. Especially the components corners suffer from the delamination due to exten-sive surface heating and presence of brittle oxides layer. The thickness of this oxides layer is hetero-geneous with respect of the component thickness as well as the component geometry. It was found the oxides layer is the thermally initiated process since in these regions the underlying matrix also exhibits the higher thickness of the heat affected zone and higher degree of the hardening expressed in term of HV0.1. Furthermore, also the compressive residual stresses exhibit higher amplitudes in the region remarkably affected by the thermal cycle.
{"title":"Analysis of the Coating Delamination after Laser Beam Cutting","authors":"Anna Mičietová, Miroslav Neslušan, Zuzana Florková, Mária Čilliková","doi":"10.21062/mft.2023.070","DOIUrl":"https://doi.org/10.21062/mft.2023.070","url":null,"abstract":"This paper analyses surface after laser beam machining with respect of surface height irregularities, residual stress state as well as microstructure on the low alloyed steel S 235. Surface after laser beam machining is investigated due to its specific nature resulting into coating delamination. This coating delamination can be found especially in the regions in which component shape or/and curvature of the profile is altered. Especially the components corners suffer from the delamination due to exten-sive surface heating and presence of brittle oxides layer. The thickness of this oxides layer is hetero-geneous with respect of the component thickness as well as the component geometry. It was found the oxides layer is the thermally initiated process since in these regions the underlying matrix also exhibits the higher thickness of the heat affected zone and higher degree of the hardening expressed in term of HV0.1. Furthermore, also the compressive residual stresses exhibit higher amplitudes in the region remarkably affected by the thermal cycle.","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135396158","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}
Vladimír Bechný, Miroslav Matuš, Richard Joch, Mário Drbúl, Jozef Holubják, Andrej Czán, Michal Šajgalík, Jaromír Markovič
Casting with a disposable pattern is a method employed to produce intricate-shaped castings. This manufacturing technique falls into the near-net shape methods category, which ensures that the result-ing castings closely resemble the final components. Its primary application lies in industries where pre-cision and complex castings are of paramount importance. Typically, castings manufactured using this method utilize higher-cost materials. The focus of this study centres on the utilization of reverse engi-neering in the production, modification, and inspection of wax injection moulds during the casting pro-cess. Within the scope of this investigation, a non-contact method employing the Kreon arm with the Aqulion scanner was implemented. This method facilitated the generation of a digital scan, serving as the foundation for designing and validating the mould for subsequent practical application.
{"title":"Design of an Injection Mould Utilizing Experimental Measurements and Reverse Engineering","authors":"Vladimír Bechný, Miroslav Matuš, Richard Joch, Mário Drbúl, Jozef Holubják, Andrej Czán, Michal Šajgalík, Jaromír Markovič","doi":"10.21062/mft.2023.072","DOIUrl":"https://doi.org/10.21062/mft.2023.072","url":null,"abstract":"Casting with a disposable pattern is a method employed to produce intricate-shaped castings. This manufacturing technique falls into the near-net shape methods category, which ensures that the result-ing castings closely resemble the final components. Its primary application lies in industries where pre-cision and complex castings are of paramount importance. Typically, castings manufactured using this method utilize higher-cost materials. The focus of this study centres on the utilization of reverse engi-neering in the production, modification, and inspection of wax injection moulds during the casting pro-cess. Within the scope of this investigation, a non-contact method employing the Kreon arm with the Aqulion scanner was implemented. This method facilitated the generation of a digital scan, serving as the foundation for designing and validating the mould for subsequent practical application.","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395528","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}
Muhammad Wafiuddin Suhami, Norfariza Ab Wahab, H. Boejang, Khairum Hamzah, Hiroyuki Sasahara
In today's manufacturing industry, composites are widely used. This is primarily due to the highly variable material properties that can be obtained by combining various materials as reinforcements and matrices. However, modern environmental concerns have pushed researchers and engineers to seek materials from organic and renewable sources. The study will look into composite surface roughness during the cutting process, which will involve milling with a CNC router machine. A portable surface roughness tester will be used to obtain a surface roughness average (Ra) reading, and microscopes will be used to examine the composite surface roughness behaviour under a microscope. Based on the results of the experiment, 82 wt.% vinyl ester resin on coconut fibre composite provides the best material properties. With a constant feed rate of 500 mm/min applied to spindle speeds of 5,000, 20,000, and 30,000 rpm, the 5,000 rpm showed the best surface roughness average performance compared to the other two. Further research focusing on feed rates may be required to better deduce the material machining data.
{"title":"Characteristics of Coconut Fibre Combined with Vinyl Ester Composites Through Material Testing and Machining","authors":"Muhammad Wafiuddin Suhami, Norfariza Ab Wahab, H. Boejang, Khairum Hamzah, Hiroyuki Sasahara","doi":"10.21062/mft.2023.071","DOIUrl":"https://doi.org/10.21062/mft.2023.071","url":null,"abstract":"In today's manufacturing industry, composites are widely used. This is primarily due to the highly variable material properties that can be obtained by combining various materials as reinforcements and matrices. However, modern environmental concerns have pushed researchers and engineers to seek materials from organic and renewable sources. The study will look into composite surface roughness during the cutting process, which will involve milling with a CNC router machine. A portable surface roughness tester will be used to obtain a surface roughness average (Ra) reading, and microscopes will be used to examine the composite surface roughness behaviour under a microscope. Based on the results of the experiment, 82 wt.% vinyl ester resin on coconut fibre composite provides the best material properties. With a constant feed rate of 500 mm/min applied to spindle speeds of 5,000, 20,000, and 30,000 rpm, the 5,000 rpm showed the best surface roughness average performance compared to the other two. Further research focusing on feed rates may be required to better deduce the material machining data.","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395668","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}
Lenka Bartosova, Marcel Kohutiar, Michal Krbata, Jana Escherova, Maros Eckert, Milan Jus
The presented work deals with the study of the effect of increasing the doses of irradiation by accel-erated electrons on the sliding properties of polymer materials. Due to the influence of radiation, sur-face roughness changes occur on the surface of the experimental materials, which lead to changes in the properties of the coefficient of friction on the selected polymer materials. Three types of polymer materials PET, PTFE and PE2000C were used for the experimental research, which, due to their properties, are used for different types of sliding products. A steel ball of G40 material was used as a pressure material, which moved along a linear path on which the load was increased from 10 N to 100 N. Electron beam accelerators with the conversion of electrons to X-rays combine the advantages of a high ability to penetrate gamma photons sources and high performance of electron beam devices. The application possibilities of the device are wide due to the dual mode of operation (electron beam or X-ray beam) and a wide range of applicable doses and also dose rates.
{"title":"The Influence of Accelerated Electron Irradiation on the Change of Tribological Behavior of Polymeric Materials PET, PTFE & PE2000C","authors":"Lenka Bartosova, Marcel Kohutiar, Michal Krbata, Jana Escherova, Maros Eckert, Milan Jus","doi":"10.21062/mft.2023.068","DOIUrl":"https://doi.org/10.21062/mft.2023.068","url":null,"abstract":"The presented work deals with the study of the effect of increasing the doses of irradiation by accel-erated electrons on the sliding properties of polymer materials. Due to the influence of radiation, sur-face roughness changes occur on the surface of the experimental materials, which lead to changes in the properties of the coefficient of friction on the selected polymer materials. Three types of polymer materials PET, PTFE and PE2000C were used for the experimental research, which, due to their properties, are used for different types of sliding products. A steel ball of G40 material was used as a pressure material, which moved along a linear path on which the load was increased from 10 N to 100 N. Electron beam accelerators with the conversion of electrons to X-rays combine the advantages of a high ability to penetrate gamma photons sources and high performance of electron beam devices. The application possibilities of the device are wide due to the dual mode of operation (electron beam or X-ray beam) and a wide range of applicable doses and also dose rates.","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395960","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}
Jakub Jopek, Marek Góral, Barbara Koscielniak, Kamil Ochal, Marcin Drajewicz, Magdalena Mokrzycka, Tadeusz Kubaszek, Kamil Dychton, Kamil Gancarczyk, Andrzej Gradzik, Pawel Kwasniewski, Wojciech Gluchowski
Jakub Jopek, Marek GĂłral, Barbara Koscielniak, Kamil Ochal, Marcin Drajewicz, Magdalena Mokrzycka, Tadeusz Kubaszek, Kamil Dychton, Kamil Gancarczyk, Andrzej Gradzik, Pawel Kwasniewski, Wojciech Gluchowski
Jakub Jopek, Marek G³ral, Barbara Koscielniak, Kamil Ochal, Marcin Drajewicz, Magdalena Mokrzycka, Tadeusz Kubaszek, Kamil Dychton, Kamil Gancarczyk, Andrzej Gradzik, Pawel Kwasniewski, Wojciech Gluchowski
{"title":"The Influence of Industrial-Scale Pack-Boroding Process Time on Thickness and Phase Composition of Selected Cold-Work Tool Steels","authors":"Jakub Jopek, Marek Góral, Barbara Koscielniak, Kamil Ochal, Marcin Drajewicz, Magdalena Mokrzycka, Tadeusz Kubaszek, Kamil Dychton, Kamil Gancarczyk, Andrzej Gradzik, Pawel Kwasniewski, Wojciech Gluchowski","doi":"10.21062/mft.2023.069","DOIUrl":"https://doi.org/10.21062/mft.2023.069","url":null,"abstract":"Jakub Jopek, Marek GĂłral, Barbara Koscielniak, Kamil Ochal, Marcin Drajewicz, Magdalena Mokrzycka, Tadeusz Kubaszek, Kamil Dychton, Kamil Gancarczyk, Andrzej Gradzik, Pawel Kwasniewski, Wojciech Gluchowski","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395324","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}
Milan Uhríčik, Peter Palček, Mária Chalupová, Lenka Kuchariková, Lucia Pastierovičová, Denisa Medvecká, Lenka Markovičová, Róbert Balšianka, Alan Vaško
The article deals with the analysis of the structure and fracture surface of aluminum alloy samples. Alu-minum alloy AlMg9 was used as an experimental material. The material from which the samples were made was supplied as cast without heat treatment, and specifically the material was produced by the continuous casting method. The structure of the test material was examined using a Neophot 32 optical microscope, and the fracture surface of the test sample was examined using a scanning electron microscope (SEM). The fatigue life of the aluminum alloy was tested by three-point bending cyclic loading using the parameters - frequency f = 100 Hz, temperature T = 22 ± 5 ℃ and stress ratio R = 0.11. The analysis showed that cast aluminum alloys are very sensitive to casting defects, such as porosity or the content and distribution of intermetallic phases. If large pores or phases are present on or near the surface of the sample, this can be the dominant cause of fatigue crack initiation and reduction of the fatigue lifetime.
{"title":"Structural and Fractographic Analysis of Aluminum Alloy before and After Fatigue Loading","authors":"Milan Uhríčik, Peter Palček, Mária Chalupová, Lenka Kuchariková, Lucia Pastierovičová, Denisa Medvecká, Lenka Markovičová, Róbert Balšianka, Alan Vaško","doi":"10.21062/mft.2023.067","DOIUrl":"https://doi.org/10.21062/mft.2023.067","url":null,"abstract":"The article deals with the analysis of the structure and fracture surface of aluminum alloy samples. Alu-minum alloy AlMg9 was used as an experimental material. The material from which the samples were made was supplied as cast without heat treatment, and specifically the material was produced by the continuous casting method. The structure of the test material was examined using a Neophot 32 optical microscope, and the fracture surface of the test sample was examined using a scanning electron microscope (SEM). The fatigue life of the aluminum alloy was tested by three-point bending cyclic loading using the parameters - frequency f = 100 Hz, temperature T = 22 ± 5 ℃ and stress ratio R = 0.11. The analysis showed that cast aluminum alloys are very sensitive to casting defects, such as porosity or the content and distribution of intermetallic phases. If large pores or phases are present on or near the surface of the sample, this can be the dominant cause of fatigue crack initiation and reduction of the fatigue lifetime.","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134912066","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}
{"title":"Research on Floating Point Accumulation Based on Improved Kahan Algorithm","authors":"Chunling Wang","doi":"10.21062/mft.2023.065","DOIUrl":"https://doi.org/10.21062/mft.2023.065","url":null,"abstract":"","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43496086","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}
{"title":"Exploration and Realization about Teaching Experimental of CNC Machine Tool Based on Virtual Simulation Technology","authors":"Lifu Liu, Wei Li, Xuerui Chen","doi":"10.21062/mft.2023.066","DOIUrl":"https://doi.org/10.21062/mft.2023.066","url":null,"abstract":"","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45423517","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}
{"title":"Mapping and Autonomous Obstacle Avoidance of Mobile Robot Based on ROS Platform","authors":"Peng Qian, Naijia Xu, Cunlong Fu, Shudong Deng","doi":"10.21062/mft.2023.064","DOIUrl":"https://doi.org/10.21062/mft.2023.064","url":null,"abstract":"","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49031120","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}
{"title":"Effect of Milling Parameters on the Surface Roughness of SiCp/Al Materials","authors":"Liang Wang, Yongqiang Pan, Xiaoxin Zhu","doi":"10.21062/mft.2023.063","DOIUrl":"https://doi.org/10.21062/mft.2023.063","url":null,"abstract":"","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41899127","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}
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