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Design and Fabrication of a Power Rotary Slicing Machine 动力旋转切片机的设计与制造
IF 1.4 Q2 Social Sciences Pub Date : 2023-06-30 DOI: 10.14445/23488360/ijme-v10i6p102
Oladebeye Dayo Hephzibah, Adefidipe Ebenezer Rotimi, Maliki Omeiza Bayode, Elegbeleye Kayode Edward
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引用次数: 0
The Effect of Design Parameters on the Discharge of a Transparent Cylinder Single-Acting Reciprocating Pump 设计参数对透明圆筒单作用往复泵流量的影响
IF 1.4 Q2 Social Sciences Pub Date : 2023-06-30 DOI: 10.14445/23488360/ijme-v10i6p104
Ekong Godwin I, Essien Promise J, Udom Evans J
- This project presents the Effect of Design Parameters on the Discharge of a Single-acting Reciprocating Pump for use in the Mechanical Engineering laboratory of the Akwa Ibom State University (AKSU). The project provides a portable positive displacement pump for demonstrating the movement of fluids in the laboratory. The component consists of a-transparent piston-cylinder assembly, suction pipe, delivery pipe, suction valve, delivery valve, crank, and connecting rod mechanism powered by an electric motor. During the operation of this apparatus, there will be visual movement of the piston during the suction and delivery stroke per each cycle. The pump piston has a diameter of 0.100 m, a stroke length of 0.305 m, and a designed speed of 20 r.p.m. The suction head and delivery are 0.762 m and 1.585 m, respectively. The practical operations were performed, and data was collected. The reciprocating pump principles were applied for the pressure head analysis during the suction and delivery strokes. The parametric analysis carried out includes the acceleration head during the suction stroke at the beginning of the delivery stroke and the pressure head in the middle of the stroke and at the end of the suction stroke. Analyses were performed, and the results indicate a pump discharge of delivery.0008 m3/s with work done by the pump of 18.40 Nm/sec. Further studies were performed for four different piston diameters, stroke lengths, and speeds. The results were used in the computation analysis for the discharge and work done by the pump.
-本项目介绍了设计参数对用于Akwa Ibom州立大学(AKSU)机械工程实验室的单作用往复泵流量的影响。该项目提供了一种便携式容积泵,用于在实验室中演示流体的运动。该组件由透明活塞-气缸组件、吸入管、输送管、吸入阀、输送阀、曲柄和由电动机驱动的连杆机构组成。在本设备的运行过程中,在每个循环的吸入和输送行程中,活塞会有明显的运动。泵柱塞直径为0.100 m,行程长度为0.305 m,设计转速为20转/分,吸入扬程为0.762 m,输出量为1.585 m。进行实际操作,收集数据。应用往复泵原理对吸、输行程压头进行了分析。所进行的参数分析包括输送行程开始时吸入行程中的加速度压头和行程中及吸入行程结束时的压力压头。进行了分析,结果表明,泵的流量输送。0008立方米/秒,泵做的功为18.40纳米/秒。对四种不同的活塞直径、冲程长度和速度进行了进一步的研究。计算结果用于泵的流量和做功的计算分析。
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引用次数: 0
Modeling and stability analysis of a sliding bead from a problem-based learning perspective 基于问题学习的滑头建模与稳定性分析
IF 1.4 Q2 Social Sciences Pub Date : 2023-06-19 DOI: 10.1177/03064190231178881
B. Roccia, Guillermo R. Bossio, F. Mazzone, C. Gebhardt
In this work, we adopt a problem-based learning approach to develop an integrative bachelor project that relies on competences acquired from basic courses in mathematics, mechanics and computation. In this sense, the proposed project tries to pave the way from “apparently disconnected” concepts gained through previous studies toward the field of computational mechanics. On this basis, we study the motion of a particle along an arbitrary curve in space subject only to the gravitational field, the so-called sliding bead. Although this is a classic problem in mechanics, it has a substantial richness from a theoretical and practical point of view where the student reinforcing abstract skills and exploring different aspects of its numerical solution are allowed. Along this path, we start with the modeling process. This is followed by a stability analysis of the governing differential equations. Later on, we present a moderate introduction to classical numerical time integration by considering several numerical schemes and the well-known Matlab add-on Simulink. Finally, we present a brief discussion about how the proposed project allows articulating concepts of mathematics, mechanics, and computation in engineering programs of studies at horizontal and vertical levels.
在这项工作中,我们采用了一种基于问题的学习方法来开发一个综合学士项目,该项目依赖于从数学、力学和计算基础课程中获得的能力。从这个意义上说,拟议的项目试图从以前的研究中获得的“明显脱节”的概念向计算力学领域铺平道路。在此基础上,我们研究了粒子在只受引力场作用的空间中沿着任意曲线的运动,即所谓的滑动珠。尽管这是力学中的一个经典问题,但从理论和实践的角度来看,它有着丰富的内容,学生可以加强抽象技能,探索其数值解的不同方面。沿着这条路,我们从建模过程开始。接下来是对控制微分方程的稳定性分析。稍后,我们将通过考虑几种数值格式和著名的Matlab插件Simulink,对经典的数值时间积分进行适度的介绍。最后,我们简要讨论了拟建项目如何在水平和垂直水平的工程研究项目中阐明数学、力学和计算的概念。
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引用次数: 0
Given-Find-In Order To-Subjected To (GFIS) method for the problem statement in set-based design 基于集合设计中问题陈述的给定按顺序查找(GFIS)方法
IF 1.4 Q2 Social Sciences Pub Date : 2023-06-15 DOI: 10.1177/03064190231181339
J. C. Fernández-Caballero, Alberto A. Hernández-Luna, D. Sobek, R. Ramírez-Mendoza
The Given-Find-Solution (GFS) method is a widely used procedure to systematically understand “what the problem is” in engineering problems. Nevertheless, the GFS method does not provide a clear guide on how to handle uncertainty, feasibility, and preference for design problems. Addressing this issue is crucial since the designer usually requires making assumptions to be able to propose functional solutions. The Given-Find-In Order To-Subjected To (GFIS) method and roadmap are here proposed to systematically state a design problem and requirements using fuzzy desirability functions to handle uncertainty, feasibility, and preference. The GFIS method lists the parameters, variables, specifications, restrictions, and preferences to facilitate the decision-making process. A comparative study was conducted with undergraduate students from Tecnológico de Monterrey enrolled in the course Design Methodologies. The students solved a band brake design problem before and after applying the GFIS method, and their performance was compared. The results showed a significant improvement in their decision-making ability, their capability to find feasible solutions, and the time required to make a design proposal.
给定求解(GFS)方法是一种广泛使用的程序,用于系统地理解工程问题中的“问题是什么”。然而,GFS方法并没有就如何处理设计问题的不确定性、可行性和偏好提供明确的指导。解决这个问题至关重要,因为设计者通常需要做出假设才能提出功能解决方案。本文提出了Given Find In Order To Subjected To(GFIS)方法和路线图,使用模糊期望函数来处理不确定性、可行性和偏好,系统地陈述设计问题和需求。GFIS方法列出了参数、变量、规范、限制和偏好,以便于决策过程。对蒙特雷技术学院参加设计方法学课程的本科生进行了比较研究。学生们在应用GFIS方法前后解决了一个带式制动器的设计问题,并对他们的性能进行了比较。结果表明,他们的决策能力、寻找可行解决方案的能力以及提出设计方案所需的时间都有了显著提高。
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引用次数: 0
Students’ project for instrumentation and automation of a manually operated torsion testing machine with educational purposes 具有教育目的的手动扭转试验机的仪器仪表和自动化学生项目
IF 1.4 Q2 Social Sciences Pub Date : 2023-06-12 DOI: 10.1177/03064190231182125
Wagner Rossi de Oliveira Filho, Geraldo Lúcio de Faria, Ronilson Rocha, Sidney Cardoso de Araújo
From the pedagogical point of view, a very interesting initiative for engineering schools is to engage their students in design, renovation, or maintenance projects of laboratory equipment. It allows engineering students to work on real projects, with all the difficulties that arise in field testing, and to gain hands-on experience from the confrontation of practical situations and challenges, which presents positive outcomes regarding learning objectives and program appreciation. This article presents an engineering project developed by students for instrumentation and automation of an old manually operated torsion testing machine, for execution of accurate mechanical tests and reliable physical replications of real-world industrial processes on laboratory scale. An electrical resistive furnace is incorporated into the torsion testing machine to also allow hot torsion tests with controlled temperature. In addition to students’ skills development, this project yields a completely functional instrumented and automated torsion testing machine, with a controlled temperature electrical furnace and other features that have been used in Bachelor, Master, and Doctoral projects, laboratory classes, and new research.
从教学的角度来看,工程学校的一个非常有趣的举措是让学生参与实验室设备的设计、翻新或维护项目。它允许工程专业的学生在实际项目中工作,克服现场测试中出现的所有困难,并从实际情况和挑战的对抗中获得实践经验,这在学习目标和项目欣赏方面带来了积极的结果。本文介绍了一个由学生开发的工程项目,用于旧手动扭转试验机的仪器仪表和自动化,用于在实验室规模上执行准确的机械测试和真实世界工业过程的可靠物理复制。电阻炉被纳入扭转试验机中,也允许在受控温度下进行热扭转试验。除了学生的技能发展外,该项目还生产了一台功能齐全的仪器化和自动化扭转试验机,具有可控温度电炉和其他功能,已在学士、硕士和博士项目、实验室课程和新研究中使用。
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引用次数: 0
Analysis and Predict Surface Roughness in the Hard Turning of Hardened SKD11 Steel using Mixed Ceramic Inserts 混合陶瓷刀片淬硬SKD11钢硬车削表面粗糙度分析与预测
IF 1.4 Q2 Social Sciences Pub Date : 2023-05-25 DOI: 10.14445/23488360/ijme-v10i5p101
Minh Tuan Ngo
- SKD11 steel is a high-carbon and high-chromium alloy tool steel used to do cold work or hot work dressing dies, sides of rollers, and screw heading molds. The hardened SKD11 steel has a high hardness of 58-62HRC, good wear resistance, and good toughness. Hard turning is an important process because manufacturers continually seek ways to manufacture their parts with lower cost, higher quality, rapid setups, lower investment, and smaller tooling inventory while eliminating non-value-added activities where Surface roughness is an important parameter determining the accuracy and quality of parts. In this paper, an analysis of the surface roughness of SKD11 steel in hard turning with mixed ceramic inserts is performed based on variables like cutting speed, feed, and depth of cut. The feed rate is the most significant parameter affecting the surface roughness in the machining process. Prediction of surface roughness considering the simultaneous effect of cutting parameters is very difficult. Here, a mathematical model is developed based on the simultaneous effect of depth, cutting speed, and feed rate. Moreover, the developed model is validated using different sets of cutting conditions and found in close agreement with experimental results.
- SKD11钢是一种高碳、高铬合金工具钢,用于做冷作或热作修整模具、滚子侧面、螺丝头模具。硬化后的SKD11钢具有58-62HRC的高硬度、良好的耐磨性和良好的韧性。硬车削是一项重要的工艺,因为制造商不断寻求以更低的成本、更高的质量、快速的安装、更低的投资和更少的刀具库存来制造零件,同时消除非增值活动,其中表面粗糙度是决定零件精度和质量的重要参数。本文基于切削速度、进给量和切削深度等变量,对混合陶瓷刀片硬车削时SKD11钢的表面粗糙度进行了分析。在加工过程中,进给速度是影响表面粗糙度最重要的参数。考虑切削参数同时影响的表面粗糙度预测是非常困难的。在此,建立了基于深度、切削速度和进给速度同时影响的数学模型。此外,利用不同的切削条件对所建立的模型进行了验证,发现与实验结果非常吻合。
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引用次数: 0
Multi-Functional Integrated 3D Printer 多功能集成3D打印机
IF 1.4 Q2 Social Sciences Pub Date : 2023-05-25 DOI: 10.14445/23488360/ijme-v10i5p102
Jing Liao, Chenhui Lu, Chanyuan Xiong, Baohui Qian, Xiaoying Yang
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引用次数: 0
Greek engineering students’ views of the nature of engineering 希腊工程系学生对工程本质的看法
IF 1.4 Q2 Social Sciences Pub Date : 2023-05-22 DOI: 10.1177/03064190231177431
Christina Gioti, Georgios Stylos, K. Kotsis
Nowadays demands on scientific literacy consider nature of engineering as crucial, introducing the scientific and ontological foundations of engineering. As a result, this study was conducted to examine the students’ views on nature of engineering at the Materials Science and Engineering department at University of Ioannina, through the views of first- and fifth-year students. 145 students participated in this research, 75 first-year and 70 graduate students. Participants were asked to complete a questionnaire with open-ended questions that required scientific knowledge, regarding Engineering and Science. After the collection of the questionnaires, statistical processing was carried out regarding the first and the last year student's views, as well as the prospective change of their views during the years of their study. The results of the study revealed that first-year students had already a formed view of engineering; however, their answers tended to be numerous, short and generally formulated, while a complete lack of knowledge on technical engineering issues was observed. At the same time, in elaborated questions that sought to explore their beliefs about nature of engineering, the students’ views were simple, vague, scientifically naive and in some cases non-existent. On the contrary, the fifth-year students seemed to have sufficient and satisfactory knowledge of the cognitive subject, with much more accurate and scientifically correct opinions, mainly regarding technical issues. However, their responses regarding nature of engineering simulated the first-year students, where it was found that the level of assimilation concerning nature of engineering is equally low.
当今对科学素养的要求认为工程的本质至关重要,介绍了工程的科学基础和本体论基础。因此,本研究通过一年级和五年级学生的观点,考察了约阿尼纳大学材料科学与工程系学生对工程本质的看法。145名学生参与了这项研究,其中75名是一年级学生,70名是研究生。参与者被要求完成一份包含开放式问题的问卷,这些问题需要有关工程和科学的科学知识。在收集问卷后,对第一年和最后一年学生的观点以及他们在学习期间观点的预期变化进行了统计处理。研究结果表明,一年级学生已经形成了工程观;然而,他们的答案往往很多,简短而笼统,而对技术工程问题完全缺乏了解。与此同时,在试图探索他们对工程本质的信念的详尽问题中,学生们的观点简单、模糊、科学幼稚,在某些情况下甚至根本不存在。相反,五年级的学生似乎对认知学科有足够和令人满意的知识,他们的观点更加准确和科学正确,主要是关于技术问题。然而,他们对工程性质的反应模拟了一年级学生,发现他们对工程本质的同化程度同样低。
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引用次数: 0
Development and evaluation of a virtual simulation experiment system for the course of fluid mechanics 流体力学课程虚拟仿真实验系统的开发与评价
IF 1.4 Q2 Social Sciences Pub Date : 2023-05-16 DOI: 10.1177/03064190231176130
Peng Shi, Xiaoli Fu, Juntian Yang, Lincheng Dai
Fluid mechanics is a fundamental course in many disciplines such as civil engineering and hydraulic engineering, with broad applicability and practical significance in engineering. However, the abstractness and multiplicity of its basic concepts hinders students’ first-hand experience during traditional classroom learning, and the time and space limitation of its offline experiment often results in unsatisfying teaching effectiveness. To address these challenges, a set of virtual simulation experiment system is developed for the course of fluid mechanics, along with an external support system to maximize its performance. Evaluation based on curriculum objective achievement shows that this experimental system has significantly improved the teaching effectiveness for the course of fluid mechanics. It promotes students’ independent learning skills and their ability utilizing fluid mechanics knowledge to understand, simplify and solve practical engineering problems.
流体力学是土木工程、水利工程等众多学科的基础课程,具有广泛的适用性和工程实践意义。然而,其基本概念的抽象性和多样性阻碍了学生在传统课堂学习中的第一手体验,其线下实验的时间和空间限制往往导致教学效果不理想。为了解决这些问题,本文针对流体力学课程开发了一套虚拟仿真实验系统,并辅以外部支撑系统,使其性能最大化。基于课程目标实现情况的评价表明,该实验体系显著提高了流体力学课程的教学效果。培养学生的独立学习能力和运用流体力学知识理解、简化和解决实际工程问题的能力。
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引用次数: 0
On students learning experience of fluid power engineering – Impact of simulation software 论学生学习流体动力工程的经验——模拟软件的影响
IF 1.4 Q2 Social Sciences Pub Date : 2023-05-16 DOI: 10.1177/03064190231176133
N. Mandal, Abul Kalam Azad, M. Rasul
The School of Engineering and Technology of Central Queensland University focuses on the continuous development and innovation of best learning and teaching practices to increase student retention and improve their learning experiences. Face to face and distance learning (teaching delivery models) are fundamental aspects of providing quality support to the students’ learning. One incredibly important aspect of students’ learning is to provide relevant industry-related projects and applications of relevant simulation software to mimic the systems. This paper develops students’ essential problem-solving skills and control strategies of fluid power systems in mechanical engineering through the Master of Engineering programs by employing Simulink, SimScape Fluid applications in Matlab software and Energy Plus with Design Builder. The main focus is to ensure that the students achieve the required skills of building fluid circuit models based on physical connections that directly integrate with appropriate symbols and modelling paradigms in fluid power applications to model the appropriate physical models to mimic the industrial fluid power projects selected. The basic ideas and content are to be delivered through weekly lectures and tutorial sessions, and the students’ skills in fluid power systems and software are developed and monitored through weekly workshops scheduled for all projects. The key outcomes of this study are the level of understanding of fluid power systems, development of simulation skills using the software indicated, interpretation of the results the students have obtained and validations of those results. The students must show they have developed appropriate problem-solving skills using simulation software, professional presentation and effective team-building skills. As the students develop appropriate problem-solving and engineering practice skills, their satisfaction and feedback rates improve significantly.
中央昆士兰大学工程与技术学院专注于最佳学习和教学实践的持续发展和创新,以提高学生的保留率并改善他们的学习体验。面对面和远程学习(教学交付模式)是为学生学习提供高质量支持的基本方面。学生学习的一个非常重要的方面是提供相关的行业相关项目和相关仿真软件的应用来模拟系统。本文通过在工程硕士课程中使用Matlab软件中的Simulink、SimScape fluid应用程序和Design Builder中的Energy Plus,培养学生解决机械工程中流体动力系统问题的基本技能和控制策略。主要重点是确保学生达到建立基于物理连接的流体电路模型所需的技能,这些模型直接与流体动力应用中的适当符号和建模范例相结合,以建立适当的物理模型来模拟所选的工业流体动力项目。基本思想和内容将通过每周的讲座和辅导课来传授,学生在流体动力系统和软件方面的技能将通过每周为所有项目安排的研讨会来发展和监测。本研究的主要成果是对流体动力系统的理解水平、使用所指示软件的模拟技能的发展、对学生获得的结果的解释和对这些结果的验证。学生们必须展示出他们已经具备了使用模拟软件解决问题的能力、专业的演讲能力和有效的团队建设能力。当学生发展适当的解决问题和工程实践技能时,他们的满意度和反馈率显著提高。
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引用次数: 2
期刊
International Journal of Mechanical Engineering Education
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