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Study on the effect of variable laser power on residual stress distribution in laser directed energy deposition of Ti6Al4V 研究激光定向能沉积 Ti6Al4V 过程中可变激光功率对残余应力分布的影响
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-23 DOI: 10.1016/j.cirpj.2024.10.011
Di Wu , Jiyuan Tian , Maocheng Liao , Man Zhao , Gang Liu
In the laser directed energy deposition (LDED) process, cyclic thermal stress loading induces significant temperature variations on the surface and subsurface of the workpiece during repeated heating, leading to the formation of residual tensile stress during cooling. This adversely affects the mechanical properties of the parts, causing deformation and defects. In this study, a heat transfer model and a three-dimensional stress model were established based on finite element analysis. A variable laser power (VLP) deposition strategy was proposed to dynamically simulate the temperature and stress fields of Ti6Al4V titanium alloy under different deposition strategies. The model was validated by collecting substrate temperature variations using thermocouples and measuring residual stress with an X-ray diffractometer (XRD). Experimental results showed that the temperature error between the simulation and the experiment ranged from 6.25 % to 10.12 %, with an average stress simulation error of 6.92 %. Among the four strategies, the samples using the VLP strategy showed a reduction in the average substrate temperature by 12.68 % to 15.08 % compared to the other three strategies. The maximum principal stress in the layer was reduced by 7.8 % to 32.14 %, and the residual stress distribution was more uniform in all directions. The microstructure of the deposition layer further indicated that the VLP strategy improves residual stress distribution and leading to better deposition quality.
在激光定向能沉积(LDED)工艺中,循环热应力加载会在反复加热过程中引起工件表面和次表面显著的温度变化,导致冷却过程中形成残余拉伸应力。这会对零件的机械性能产生不利影响,导致变形和缺陷。本研究在有限元分析的基础上建立了传热模型和三维应力模型。提出了可变激光功率(VLP)沉积策略,以动态模拟不同沉积策略下 Ti6Al4V 钛合金的温度场和应力场。通过使用热电偶收集基底温度变化并使用 X 射线衍射仪(XRD)测量残余应力,对模型进行了验证。实验结果表明,模拟和实验之间的温度误差在 6.25 % 到 10.12 % 之间,平均应力模拟误差为 6.92 %。在四种策略中,使用 VLP 策略的样品与其他三种策略相比,基底平均温度降低了 12.68 % 至 15.08 %。层中的最大主应力降低了 7.8% 至 32.14%,残余应力在各个方向的分布更加均匀。沉积层的微观结构进一步表明,VLP 策略改善了残余应力分布,从而提高了沉积质量。
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引用次数: 0
Digital dynamic modeling and topology optimized design of shell face mills 壳面碾磨机的数字动态建模和拓扑优化设计
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-22 DOI: 10.1016/j.cirpj.2024.10.005
E. Ulular , Y. Altintas , A. Liljerehn
This paper presents digital modeling of shell face mills in milling cylinder heads. The cutter's structural dynamics and its mode shapes are predicted using a Finite Element system. The geometries of the cutter body and inserts are imported from their Computer Aided Design (CAD) models. The insert edge is discretized into small segments to model its varying normal rake and inclination angles, which affect the cutting mechanics. The cutter is dynamically assembled with the target machine tool spindle using the receptance coupling method. A general dynamic cutting force model, which considers the varying edge geometry and inserts’ run-outs, is developed and used to predict cutting forces and chatter stability diagrams. The proposed model is experimentally verified to demonstrate the feasibility of the systematic application of physics-based digital design and analysis of tools for the mass machining of specific parts. The cutter body shape is optimized to increase the stiffness of the bending mode shape that caused chatter via topology optimization, which led to five-fold increase in the absolute stable depth of cut.
本文介绍了用于铣削气缸盖的壳体端面铣刀的数字建模。使用有限元系统对铣刀的结构动力学及其模态形状进行了预测。刀体和刀片的几何形状是从计算机辅助设计(CAD)模型中导入的。刀片边缘被离散化为小段,以模拟其不同的法向斜角和倾角,这些都会影响切削力学。刀具与目标机床主轴之间的动态装配采用容纳耦合方法。建立了一个考虑到不同刀刃几何形状和刀片跳动的通用动态切削力模型,并用于预测切削力和颤振稳定性图。对所提出的模型进行了实验验证,以证明系统应用基于物理的数字设计和分析工具对特定零件进行大规模加工的可行性。通过拓扑优化,优化了刀体形状,增加了导致颤振的弯曲模式形状的刚度,使绝对稳定切削深度增加了五倍。
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引用次数: 0
Effect of technology multiplier: A framework for analysis of innovation perspectives on production segment allocation 技术乘数的影响:从创新角度分析生产部门分配的框架
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-22 DOI: 10.1016/j.cirpj.2024.10.002
Florian Stamer , Roman Girke , Shun Yang , Jung-Hoon Chun , Gisela Lanza
In the realm of production systems, determining the optimal segment allocation remains a central concern. While several existing models address this issue, a significant gap remains as many overlook the critical role of innovation and lack a holistic perspective. This paper presents a model that emphasizes innovation capabilities and introduces the concept of a “Technology Multiplier” underscoring the compounding influence of technology and innovation on production segment allocation decisions. Within this work, we focus on preliminary studies to establish the “Technology Multiplier” concept employing an Analytical Hierarchy Process (AHP) with sensitivity analysis. The validity of our approach is demonstrated through four case studies from three industries, illustrating the relevance of our elaborated metrics for the concept of “Technology Multipliers”. In particular, a leading automotive company uses our findings to reach a more appropriate strategic decision aligned with innovation and production growth, compared to its previous decisions. These results not only demonstrate a robust fit with our proposed metrics but also indicate that our framework lays the foundation for further research on the “Technology Multiplier”, enriching the decision-making process for production segment allocation.
在生产系统领域,确定最佳的分部分配仍然是一个核心问题。虽然现有的一些模型可以解决这一问题,但由于许多模型忽视了创新的关键作用,缺乏整体视角,因此仍然存在很大差距。本文提出了一个强调创新能力的模型,并引入了 "技术乘数 "的概念,强调技术和创新对生产部门分配决策的复合影响。在这项工作中,我们将重点放在初步研究上,通过分析层次过程(AHP)和敏感性分析来确立 "技术乘数 "的概念。我们通过对三个行业的四个案例进行研究,证明了我们的方法的有效性,说明了我们为 "技术乘数 "概念制定的指标的相关性。特别是,与之前的决策相比,一家领先的汽车公司利用我们的研究成果,做出了更符合创新和生产增长的战略决策。这些结果不仅证明了我们提出的度量标准非常适合,而且还表明我们的框架为进一步研究 "技术乘数 "奠定了基础,丰富了生产部门分配的决策过程。
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引用次数: 0
Digital tooth surface precision control model in spiral bevel gear processing through surface synthesis method combined with GEMS 通过表面合成法与 GEMS 相结合,建立弧齿锥齿轮加工中的数字齿面精度控制模型
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-22 DOI: 10.1016/j.cirpj.2024.10.006
Peng Chen, Sanmin Wang
This paper presents an innovative digital tooth surface precision control model(DTS-PCM) for spiral bevel gears, focusing on the contact parameters derived from the surface synthesis method(SSM) and the pinion tooth surface contact control parameters under Gleason expert manufacturing system(GEMS). This model enables the direct derivation of tooth cutting adjustment parameters for Gleason machine tools, facilitating a seamless integration of design theory with practical processing. Firstly, a novel method for accurately determining the curvature parameters of pinion tooth surfaces, based on predefined contact parameters, has been developed using ease-off topology. Then, based on the pinion gear cutting pitch cone model, a coupled tooth line vector transformation model is proposed to calculate the principal curvature parameters of the nodes. Additionally, a set of equations for the pinion tooth surface contact control parameters is derived, and a formula for calculating the pinion gear cutting adjustment parameters is provided. Finally, two sets of pinion tooth surface contact control parameters were obtained using DTS-PCM: the calculated tooth contact analysis(TCA) and ease-of-topology results. The findings demonstrate that the proposed method is largely consistent with the outcomes of the GEMS calculations, thereby validating the accuracy of DTS-PCM. This indicates that the method can be directly integrated with GEMS software, facilitating practical applications that shorten the design and processing cycle.
本文提出了一种创新的弧齿锥齿轮数字齿面精度控制模型(DTS-PCM),重点是由表面合成法(SSM)推导出的接触参数和格里森专家制造系统(GEMS)下的小齿轮齿面接触控制参数。该模型可直接推导格里森机床的齿面切削调整参数,促进了设计理论与实际加工的无缝结合。首先,在预定义接触参数的基础上,利用易切拓扑学开发了一种精确确定小齿轮齿面曲率参数的新方法。然后,基于小齿轮切削节锥模型,提出了一个耦合齿线矢量变换模型,用于计算节点的主曲率参数。此外,还推导出一组小齿轮齿面接触控制参数方程,并提供了小齿轮切削调整参数的计算公式。最后,利用 DTS-PCM 获得了两组小齿轮齿面接触控制参数:计算出的齿面接触分析(TCA)和易拓扑结果。研究结果表明,所提出的方法与 GEMS 计算结果基本一致,从而验证了 DTS-PCM 的准确性。这表明该方法可直接与 GEMS 软件集成,从而促进实际应用,缩短设计和加工周期。
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引用次数: 0
Sustainable additive manufacturing supply chains with a plithogenic stakeholder analysis: Waste reduction through digital transformation 通过多利益相关者分析实现可持续的增材制造供应链:通过数字化转型减少废物
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-21 DOI: 10.1016/j.cirpj.2024.10.004
Saliha Karadayi-Usta
The Additive Manufacturing (AM) industry is of paramount importance as means of personalized design capabilities by rapid prototyping, using exact amount of required materials avoiding waste, and applying Industry 4.0 technologies with digital transformation ability. The characteristics of AM are regarded as the prerequisites for sustainability in the manufacturing industry. However, there are limited papers discussing the stakeholders and sustainability objectives in a single comprehensive analysis. Hence, the purpose of this research is to identify the degree of each stakeholder to achieve the objective of sustainability in AM supply chain by proposing a novel Plithogenic Fuzzy MACTOR approach. Results reveal that the customers are in triggering position to shape entire AM supply chain as the demand generators. Workforce is a significant player in the AM supply chain by creating the design, manufacturing, marketing, and communicating to provide the collaborations in this business segment. Academia positions here a supportive role to enable the whole supply chain members in terms of delivering technological advancements, training people, and providing the workforce. The AM manufacturers and material / software / printer suppliers are the key players leading to the supply chain by producing the main business products. Thus, a practitioner can interpret its position in the AM supply chain and understand the requirements of sustainability points in detail. Besides, this study provides a theoretical contribution to the literature by extending the MACTOR analysis with Plithogenic sets via including a different uncertainty measure.
快速成型制造(AM)工业作为通过快速原型设计实现个性化设计能力、使用精确数量的所需材料避免浪费以及应用具有数字化转型能力的工业 4.0 技术的手段,具有极其重要的意义。AM 的特性被视为制造业可持续发展的先决条件。然而,通过单一的综合分析来讨论利益相关者和可持续发展目标的论文却非常有限。因此,本研究的目的是通过提出一种新颖的 Plithogenic Fuzzy MACTOR 方法,确定各利益相关者对实现 AM 供应链可持续发展目标的影响程度。研究结果表明,客户作为需求产生者,对整个 AM 供应链的形成具有触发作用。劳动力在 AM 供应链中扮演着重要角色,他们创造设计、制造、营销和交流,为这一业务领域提供合作。学术界在提供技术进步、培训人员和提供劳动力方面发挥着支持整个供应链成员的作用。AM 制造商和材料/软件/打印机供应商是供应链的主要参与者,生产主要的商业产品。因此,从业人员可以解释其在 AM 供应链中的位置,并详细了解可持续性要点的要求。此外,本研究还通过加入不同的不确定性度量,将 MACTOR 分析与 Plithogenic 集进行了扩展,从而为相关文献做出了理论贡献。
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引用次数: 0
Fast thermal simulation of WAAM processing: toward manufacturing strategy evaluation WAAM 加工的快速热模拟:面向制造战略评估
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-19 DOI: 10.1016/j.cirpj.2024.10.007
Nicolas Béraud, Yann Ledoux, El-Haddi Mechekour, Frédéric Vignat, Franck Pourroy
Managing the quality of parts produced by the Wire Arc Additive Manufacturing (WAAM) process presents a significant challenge, particularly due to the complexity of thermal control. Effective thermal management is crucial for minimizing defects, making fast and accurate thermal simulations essential for testing and optimizing various manufacturing strategies. This article proposes a rapid simulation that decouples the calculation of heat conduction from convection and radiation. The proposed simulation is described and validated against experimental data. The influences of spatial and temporal discretization are examined. In conclusion, this developed approach provides a fast and efficient simulation of a manufacturing strategy for improvement.
管理线弧快速成型制造(WAAM)工艺生产的零件质量是一项重大挑战,特别是由于热控制的复杂性。有效的热管理对于最大限度地减少缺陷至关重要,因此快速准确的热模拟对于测试和优化各种制造策略至关重要。本文提出了一种快速模拟方法,将热传导与对流和辐射的计算分离开来。本文对所提出的模拟进行了描述,并根据实验数据进行了验证。文章研究了空间和时间离散化的影响。总之,所开发的方法为改进制造策略提供了快速高效的模拟。
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引用次数: 0
A new characterization methodology for assessing machinability through cutting energy consumption 通过切削能耗评估加工性能的新表征方法
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-19 DOI: 10.1016/j.cirpj.2024.10.008
Kai Ma , Zhanqiang Liu , Bing Wang , Delin Liu
Improving machinability has consistently been an essential research topic in the machining community. However, a rapid and effective method to characterize machinability from the fundamental essence of machining is still lacking. This work proposed a new characterization methodology for assessing machinability from the principle of cutting energy consumption. An original Drop Hammer based Orthogonal Cutting (DHOC) test machine driven by gravitational potential energy was developed to conduct the machinability test. Using the Cutting Distance with Equal Energy (CDEE) method, machinability can be assessed by measuring the cutting distance without expensive measuring apparatus. Therefore, the cutting distance indicator can simplify the test procedure. Meanwhile, the CDEE method avoids the necessity for precisely calculating the consumptions of various complex cutting energies. Moreover, in-situ measurements coupled with the Digital Image Correlation (DIC) technique and Electron Back-Scattered Diffraction (EBSD) characterizations were utilized to evaluate the deformation characteristics and surface integrity during the CDEE tests. The proposed CDEE method has been validated from three aspects involving materials, cutting tools, and surface modification technology. Furthermore, a machinability optimization procedure based on the CDEE method has been proposed. The cutting distance indicator was used as an optimization objective for optimizing technology parameters to improve machinability. This CDEE method based on the DHOC test machine proved to have high application potential for the characterization and optimization of machinability.
提高加工性能一直是机械加工领域的重要研究课题。然而,目前仍缺乏一种快速有效的方法,从机械加工的根本本质出发来表征机械加工性能。这项工作提出了一种从切削能耗原理评估加工性能的新表征方法。为了进行加工性测试,我们开发了一种由重力势能驱动的基于落锤正交切削(DHOC)试验机。使用等能量切割距离(CDEE)方法,无需昂贵的测量仪器,只需测量切割距离即可评估可加工性。因此,切削距离指示器可以简化测试程序。同时,CDEE 方法避免了精确计算各种复杂切削能量消耗的必要性。此外,在 CDEE 试验过程中,还利用原位测量、数字图像相关(DIC)技术和电子背散射衍射(EBSD)特性来评估变形特征和表面完整性。从材料、切削工具和表面改性技术三个方面对所提出的 CDEE 方法进行了验证。此外,还提出了基于 CDEE 方法的可加工性优化程序。切削距离指标被用作优化技术参数以提高加工性能的优化目标。事实证明,这种基于 DHOC 试验机的 CDEE 方法在表征和优化加工性能方面具有很大的应用潜力。
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引用次数: 0
Layer-level fabrication of continuous functionally graded materials (cFGMs) via Powder Bed Fusion – Laser Beam technology 通过粉末床熔融-激光束技术在层级上制造连续功能分级材料 (cFGM)
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-19 DOI: 10.1016/j.cirpj.2024.10.009
Paolo Posa , Vito Errico , Andrea Angelastro, Sabina Luisa Campanelli
Multi-material fabrication of metals through Additive Manufacturing (AM) processes is attracting more and more attention in recent years. This work presents a novel methodology that enables the fabrication of continuous functionally graded materials (cFGMs) at the layer level using Powder Bed Fusion – Laser Beam (PBF-LB) technology. This has been achieved by designing and building a customized powder separation system that can be easily installed on a currently operating PBF-LB system with a blade/roller-based powder spreading technique (extremely limited for layer-level multi-material fabrication). This technique overcomes one of the main drawbacks of AM multi-material fabrication by properly joining materials with very different mechanical properties and low compatibility, thus extending the productive capacity of this technology. Two steels, AISI 316 L and 18 Ni Maraging 300, with different physical, chemical and mechanical properties, were used to study the applicability and verify the proposed methodology. A high-resolution optical system was used to monitor, layer by layer, the different laser-matter interactions given by the different materials and thus the presence of a graded transition zone between them. Results in terms of statical mechanical properties, microstructure, chemical analysis and optical monitoring showed that the proposed solution is reliable and cost-effective, paving the way for future applications.
近年来,通过增材制造(AM)工艺进行金属的多材料制造正吸引着越来越多的关注。本研究提出了一种新方法,可利用粉末床熔融-激光束(PBF-LB)技术在层级上制造连续功能分级材料(cFGMs)。这是通过设计和建造一个定制的粉末分离系统实现的,该系统可轻松安装在当前运行的 PBF-LB 系统上,并采用基于刀片/滚筒的粉末铺展技术(对于层级多材料制造而言极为有限)。该技术克服了 AM 多材料制造的一个主要缺点,即可以将机械性能迥异、兼容性低的材料适当连接起来,从而提高了该技术的生产能力。我们使用了两种具有不同物理、化学和机械性能的钢材(AISI 316 L 和 18 Ni 马氏体 300)来研究拟议方法的适用性并进行验证。使用高分辨率光学系统逐层监测不同材料产生的不同激光-物质相互作用,从而监测它们之间是否存在分级过渡区。在静态机械性能、微观结构、化学分析和光学监测方面的结果表明,所提出的解决方案既可靠又具有成本效益,为今后的应用铺平了道路。
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引用次数: 0
Assessment of cutting force coefficient identification methods and force models for variable pitch and helix bull-nose tools 评估可变螺距和螺旋牛鼻子刀具的切削力系数识别方法和力模型
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-15 DOI: 10.1016/j.cirpj.2024.09.010
Joshua Priest , Sabino Ayvar-Soberanis , Javier Dominguez-Caballero , Peace Onawumi , Zekai Murat Kilic , David Curtis
The mechanistic approach is commonly implemented to predict and optimise the cutting forces in milling processes to prevent tool breakages, reduce tool wear, reduce form error, and improve surface quality. To implement this method, the cutting force coefficients (CFCs), that characterise the mechanics of the process, must be calculated. This study compares the accuracy of the predicted cutting forces for variable pitch and helix bull-nose milling tools using a rapid testing (RT) optimisation-based mechanistic CFC identification method that only requires a single angular cut with increasing radial engagement to the traditional mechanistic approach that requires several straight cuts. Along with developing a hybrid technique that combines variation in feed rate and radial engagement. The traditional radial, tangential, and axial (RTA) force model is also compared with the frictional and normal rake face (UV) force model that is independent of the local tool rake and inclination angles which is a necessary for bull nose tools. The RT and the developed hybrid CFC identification method with the UV force model predicted the average Fx, Fy and Fz cutting forces to within 7.1 %, 4.3 %, and 3.8 % error, respectively. These methods were slightly less accurate than the traditional method, however they have significant industrial benefits because they have can be used to identify CFCs with either a single cut, or from any tool-path with chip-load variation, respectively. The RTA force model predicted the average cutting forces similarly to the UV force model, however, the UV force model had lower errors using the rapid RT testing method at the extreme corners of the experimental design space.
机械方法通常用于预测和优化铣削过程中的切削力,以防止刀具破损、减少刀具磨损、降低形状误差并提高表面质量。要实施这种方法,必须计算切削力系数(CFCs),这是加工过程的力学特征。本研究使用基于快速测试(RT)优化的机械 CFC 识别方法,对可变螺距和螺旋牛鼻铣刀的切削力预测精度进行了比较,该方法只需要一次角度切削,并增加径向啮合,而传统的机械方法则需要多次直切削。同时还开发了一种混合技术,将进给量和径向啮合的变化结合起来。传统的径向、切向和轴向(RTA)力模型也与摩擦力和法向斜面(UV)力模型进行了比较,后者与牛鼻子刀具所需的局部刀具斜面和倾斜角无关。RT 和开发的混合 CFC 识别方法与 UV 力模型预测的平均 Fx、Fy 和 Fz 切削力误差分别在 7.1%、4.3% 和 3.8% 以内。这些方法的精确度略低于传统方法,但它们具有显著的工业效益,因为它们可分别用于识别单次切削或任何刀具路径的切屑载荷变化的氯氟化碳。RTA 力模型对平均切削力的预测与 UV 力模型相似,但在实验设计空间的极端角落,使用快速 RT 测试方法,UV 力模型的误差更小。
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引用次数: 0
Worker-centered evaluation and redesign of manufacturing tasks for ergonomics improvement using axiomatic design principles 以工人为中心,利用公理设计原则对生产任务进行评估和重新设计,以改善工效学
IF 4.6 2区 工程技术 Q2 ENGINEERING, MANUFACTURING Pub Date : 2024-10-11 DOI: 10.1016/j.cirpj.2024.10.001
Z. Arkouli, G. Michalos, G. Kokotinis, S. Makris
Humans are considered the most valuable resource in manufacturing systems thanks to their craftsmanship, dexterity, and autonomy significantly affecting productivity, quality, and the overall company competitiveness. This paper introduces the SAGE (Systematic Approach to Generating Ergonomic Manufacturing tasks) methodology, a structured approach based on Axiomatic Design principles to integrate Human Factors evaluation early in the operations design phase and redesign manufacturing tasks to improve operators well-being. The primary objective is to mitigate discomfort and safety risks that often lead to musculoskeletal disorders, absenteeism, and production delays. SAGE provides a comprehensive framework for assessing ergonomic aspects of manufacturing tasks and identifying the need for redesign. It offers a detailed set of Functional Requirements (FRs) for reference, assesses FR satisfaction, evaluates task complexity using the Independence Axiom, and examines the intensity of FR satisfaction through the Information Axiom. The methodology includes specific implementation guidelines, ensuring its applicability across diverse manufacturing contexts. Its effectiveness is demonstrated through a large-scale parts assembly case study inspired by the bus and coach industrial sector, where a production engineer evaluated a windows assembly task and identified ergonomic design interventions. A comparative analysis with other relevant methods is finally presented, highlighting the approach's effectiveness.
人被认为是制造系统中最宝贵的资源,因为他们的手工艺、灵巧性和自主性对生产率、质量和公司整体竞争力有着重大影响。本文介绍了 SAGE(生成符合人体工程学的制造任务的系统方法)方法,这是一种基于公理设计原则的结构化方法,用于在操作设计阶段早期整合人因评估,并重新设计制造任务,以改善操作员的福祉。其主要目的是减轻经常导致肌肉骨骼疾病、旷工和生产延误的不适感和安全风险。SAGE 提供了一个全面的框架,用于评估生产任务的人体工程学方面,并确定重新设计的必要性。它提供了一套详细的功能要求(FR)供参考,评估功能要求的满意度,使用独立性公理评估任务的复杂性,并通过信息公理检查功能要求满意度的强度。该方法包括具体的实施指南,确保其适用于各种制造环境。受公共汽车和长途客车工业部门的启发,该方法通过大规模零件装配案例研究证明了其有效性,在该案例研究中,一名生产工程师评估了窗口装配任务,并确定了符合人体工程学的设计干预措施。最后还介绍了与其他相关方法的比较分析,突出了该方法的有效性。
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引用次数: 0
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