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Manufacturing Engineering and Technology
... The 1000 s (16 min and 40 s) tests have been of special interest since many tool manufacturers specify a tool life of approximately 15 min. In fact, this has been verified in dry tests [27]. trials conducted (Figure 12). ...
... The 1000 s (16 min and 40 s) tests have been of special interest since many tool manufacturers specify a tool life of approximately 15 min. In fact, this has been verified in dry tests [27]. ...
Machining titanium alloys, particularly Ti6Al4V, pose significant challenges in manufacturing engineering. The combination of high strength and low thermal conductivity makes Ti6Al4V a particularly difficult material to machine. One of these difficulties is the rapid wear and short tool life of cutting tools, which substantially increases manufacturing costs. To address this issue, the texturing of cutting tools, especially using laser-based techniques, has garnered significant attention due to its potential to enhance the tribological performance of textured surfaces. In this paper, by means of a groove design applied to a tungsten carbide (WC) disc by laser surface texturing (LST), its behavior and wear have been evaluated after subjecting it to tribological pin-on-flat tests by confronting it with Ti6Al4V pins with different reciprocating times (250 s, 500 s, 750 s and 1000 s) in lubricated and dry conditions. In addition, these same tests have been replicated without textures for comparison. Through conducting this research, we expect to gain new insights into texturing processes and their influence on friction and sliding behavior under lubricated conditions. Additionally, the study aims to evaluate how lubricant retention capacity varies to reduce friction and wear across different testing durations. The results show better behavior with textures, reaching a higher rate of volume loss in the titanium pins. The main conclusions obtained after these tests are that textures offer a better performance in tests up to 800 s. In addition, after this time, the lubricant begins to lose its properties, becoming an abrasive paste.
... For applications requiring high strength and heat resistance, including those in the aerospace, medical, and electronic industries, advanced materials have been developed in recent decades. These materials include ferrous alloys, cobalt-chromium alloys, and composites [9,15]. These materials have significant corrosion resistance and the capacity to maintain superior strength at high temperatures. ...
... These materials outperform more traditional engineering materials in terms of strength and toughness. However, since converting a final component costs half of the product's final cost, applications of these materials are currently not expanding [9,10]. Low cutting speed and reduced cut depth because of increased tool wear are to blame for this. ...
... The casting process is conducted using large sand molds. Casting tolerances depends on the item size and according to [8] the tolerances are in the range of 1.6-4 mm. Additionally cores can be slightly shifted, leading to deviating geometry. ...
This report covers some initial aspects of development of the mobile InnoMill machining cell. The new machining paradigm where the machine is mounted on the workpiece is compared to the old paradigm where the workpiece is mounted inside the machine, and differences are discussed. Parametric studies of the workpiece case study of the InnoMill project, the Vestas V112-3.0MW wind turbine hub, are performed to supply insight regarding load capacity etc. for the machine designers. The hub finite element model is validated using experimental results from Operational Modal Analysis performed on the hub. Furthermore, the InnoMill concept is described, and work regarding the 6 degree of freedom parallel kinematic manipulator which is present in the concept is performed. A numerical procedure accounting for base deflections due to static loading is proposed and implemented. Additionally, a six degree of freedom spring-mass model vibrational response is compared to vibrational response obtained from experiments on the 6 degree of freedom parallel kinematic manipulator at Aarhus University. The model, which is based on assumptions commonly found in literature, is rejected. Finally, an outlook for the remaining part of the PhD project is presented.
... The text is a standard materials and processes text often used in the sophomore or junior year of industrial or mechanical engineering programs. 4 The course has one credit hour of "lecture" credit meeting in the classroom, in addition to the two credit hours of laboratory (four actual hours per week in the lab, meeting two hours, two days a week). The classroom meeting builds on text homework and applications. ...
... Forging processes involve deformation metal blanks under high pressure and temperature to produce components with improved mechanical properties and grain structure. Casting techniques, including investment and sand casting, are utilized to manufacture complex-shaped bearing components in large quantities with cost-effective production [20]. Additionally, additive manufacturing (3D printing) advancements have enabled the fabrication of custom-designed bearings with intricate geometries and optimized material properties, offering flexibility and agility in bearing production [21]. ...
This comprehensive study looks at the evolution, guiding concepts, types, applications, challenges, and recent
advancements in bearings in engineering contexts. From prehistoric societies to the industrial revolution, bearing
development may be traced back through time, including significant inventions that shaped modern engineering
methods. Fundamental principles provide clarity on key concepts for optimizing bearing performance, including
load distribution, friction reduction, and lubrication. A range of bearing types, from complex fluid and magnetic
bearings to traditional ball and roller bearings, that exhibit versatility in engineering applications are examined.
Innovation is driven by advancements in materials and production techniques, like ceramics, polymers, and
additive manufacturing, which enhance the performance and sustainability of bearings. Opportunities for
preventative maintenance and increased operational effectiveness are presented by new advancements in sensor
technology and smart bearings. The disadvantages are discussed along with a summary of engineering bearing
types and uses.
Material removal processes, or machining (encompassing milling, turning, and drilling), constitute an indispensable facet of manufacturing. To attain optimal machining performance—characterized by a high material removal rate, minimal tool wear, and superior surface finish—cutting conditions (such as the depth of the cut, feed rate, and cutting speed) must be meticulously optimized. Traditionally, this optimization has been contingent upon datasets collected from a singular, reliable source. However, in the paradigm of smart manufacturing, this data dependency is transitioning from a single source to a confluence of heterogeneous, open sources. Accordingly, this study elucidates a systematic approach for harnessing open-source machining datasets in a cogent and efficacious manner. Specifically, an open data source pertaining to turning operations, comprising 1013 records related to tool wear, is studied. From this corpus, 289 records corresponding to mild steel (JIS code: S45C) undergo rigorous analysis via Analysis of Variance (ANOVA), Signal-to-Noise Ratio (SNR), and possibility distributions. The empirical findings reveal that possibility distributions exhibit superior efficacy over ANOVA and SNR in extracting salient insights for optimization. Nevertheless, in certain scenarios, an integrative approach leveraging all three methods is requisite to attain optimal results. This study thus proffers a pragmatic computational framework, augmenting the optimization of machining within the purview of smart manufacturing.
Occupational Safety and Health (OHS) is an important aspect that must be implemented in the plantation sector which has a high risk of accidents, including in melon plantations in Lamongan Regency. This study aims to increase awareness and understanding of farmers and workers regarding the implementation of OHS through a community service program with a qualitative approach based on case studies. The activities were carried out in two stages, namely preparation and implementation, which involved collecting information about working conditions and training in the form of socialization, interactive discussions, demonstrations of the use of personal protective equipment (PPE), and direct practice in the field. The results showed a significant increase in participants' understanding and awareness of the importance of OHS, which was reflected in their enthusiasm in participating in the activities and their commitment to implementing OHS standards. Support from the village government and community leaders strengthened the sustainability of this program. This study concluded that a participatory approach with case studies was effective in increasing OHS awareness in the plantation sector and could be replicated in other agricultural sectors.
In the current study, the emphasis was on finding experimental results on machinability of Glass fibre reinforced plastic composite with milling machine. Study is carried out with objectives of examination of cutting parameter on GFRP materials. Speed , feed, depth of cut & number of flute are consider for analyzing effect on surface finish & cutting forces of composites. Design of experiment is carry out by Taguchi’s L18 orthogonal array. To find out more about the machining parameters on GFRP composite using end mill of cemented carbide, an analysis of variances (ANOVA) utilizing Minitab 15 software was finally carried out.
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