Digital design and manufacturing process comparison for new custom made product family – a case study of a bathroom faucet

In literature, there are a number of indexes suggested that serve as the indicator of commonality among product components, modules and variants. However, as these elements are increasingly interconnected with aspects other than the component view, the existing commonality metrics are unable to effectively model these aspects due to their limitation in capturing relevant information for analysis. Therefore, there exists a need to consider multiple design and manufacturing aspects in commonality metrics so that a comprehensive view of the commonality among product variants can be presented. In the current representation schemes proposed for product family modeling, ontology is one of the most promising ones to model the complex semantic relations among various elements in a product family. Nevertheless, the research and application of ontology in the analysis of a product family has so far received little attention. In this paper, we proposed a framework to generate a semantically annotated multi-facet product family ontology. Using a case study of a laptop computer family, we suggest and demonstrate a new commonality analysis approach based on the semantically annotated multi-facet laptop product family ontology. Together with a new method of deriving product variants based on the aforementioned ontology, our approach illustrates the merits of using semantic annotation in assisting ontology based product family analysis.

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Integration of Knowledge Engineering and 3D Printing for Digital Design and Manufacturing — A Case Study

Proceedings of the 1st International Conference on Progress in Additive Manufacturing ◽

10.3850/978-981-09-0446-3_060 ◽

2014 ◽

Cited By ~ 1

Author(s):

Danni Chang ◽

Chun-Hsien Chen

Keyword(s):

3D Printing ◽

Knowledge Engineering ◽

Digital Design ◽

Design And Manufacturing

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Cumulative Inaccuracies in Implementation of Additive Manufacturing Through Medical Imaging, 3D Thresholding, and 3D Modeling: A Case Study for an End-Use Implant

Applied Sciences ◽

10.3390/app10082968 ◽

2020 ◽

Vol 10 (8) ◽

pp. 2968 ◽

Cited By ~ 3

Author(s):

Jan Sher Akmal ◽

Mika Salmi ◽

Björn Hemming ◽

Linus Teir ◽

Anni Suomalainen ◽

...

Keyword(s):

Computed Tomography ◽

Additive Manufacturing ◽

Medical Imaging ◽

3D Modeling ◽

Computer Aided Design ◽

Digital Design ◽

Worst Case ◽

Custom Made ◽

End Use

In craniomaxillofacial surgical procedures, an emerging practice adopts the preoperative virtual planning that uses medical imaging (computed tomography), 3D thresholding (segmentation), 3D modeling (digital design), and additive manufacturing (3D printing) for the procurement of an end-use implant. The objective of this case study was to evaluate the cumulative spatial inaccuracies arising from each step of the process chain when various computed tomography protocols and thresholding values were independently changed. A custom-made quality assurance instrument (Phantom) was used to evaluate the medical imaging error. A sus domesticus (domestic pig) head was analyzed to determine the 3D thresholding error. The 3D modeling error was estimated from the computer-aided design software. Finally, the end-use implant was used to evaluate the additive manufacturing error. The results were verified using accurate measurement instruments and techniques. A worst-case cumulative error of 1.7 mm (3.0%) was estimated for one boundary condition and 2.3 mm (4.1%) for two boundary conditions considering the maximum length (56.9 mm) of the end-use implant. Uncertainty from the clinical imaging to the end-use implant was 0.8 mm (1.4%). This study helps practitioners establish and corroborate surgical practices that are within the bounds of an appropriate accuracy for clinical treatment and restoration.

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Application of Product Line Commonality Index (PCI) in a Family of Products

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.564.650 ◽

2014 ◽

Vol 564 ◽

pp. 650-655 ◽

Cited By ~ 1

Author(s):

M. Oliver Rubio ◽

O. Julian Mora ◽

G. Alvaro Guarin ◽

I. Pablo Carrizosa

Keyword(s):

Product Family ◽

Value Added ◽

Product Line ◽

Effective Management ◽

Aesthetic Appearance ◽

Design And Manufacturing ◽

Bicycle Frame ◽

Market Needs ◽

Commonality Index

Currently many companies base their marketing strategy around a family of products. Thus, they regularly add new variations to products in order to meet changing market needs, or to attract new customers. Although the basic functionality remains unchanged across products, new features, aesthetic appearance and technologies are incorporated in each new product. This if it is not checked, can generate the “complexity of the product,” which leads to a loss of productivity or quality. Thus, the effective management of product variations in design and manufacturing is challenging. The key is minimizing the non-value added variations through models within a range of options without limiting customers. This article discusses the factors that contribute to the "complexity of the product” and this is done through the product line commonality index (PCI) , which measures the level of common parts in a product family. A case study of bicycle frame displays its implementation and functionality. The index shows the possibility that the products in a family share parts effectively (modularity) and reduces the total number of parts (multifunctionality).

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Towards 3D printing of a monocoque transtibial prosthesis using a bio-inspired design workflow

Rapid Prototyping Journal ◽

10.1108/rpj-06-2021-0136 ◽

2021 ◽

Vol 27 (11) ◽

pp. 67-80

Author(s):

Luca Gabriele De Vivo Nicoloso ◽

Joshua Pelz ◽

Herb Barrack ◽

Falko Kuester

Keyword(s):

3D Printing ◽

Human Motion ◽

Optimization Techniques ◽

Digital Design ◽

Digital Workflow ◽

Content Type ◽

Prosthetic Devices ◽

Custom Made ◽

Design And Manufacturing ◽

Transtibial Prosthesis

Purpose There are over 40 million amputees globally with more than 185,000 Americans losing their limbs every year. For most of the world, prosthetic devices remain too expensive and uncomfortable. This paper aims to outline advancements made by a multidisciplinary research group, interested in advancing the restoration of human motion through accessible lower limb prostheses. Design/methodology/approach Customization, comfort and functionality are the most important metrics reported by prosthetists and patients. The work of this paper presents the design and manufacturing of a custom made, cost-effective and functional three-dimensional (3D) printed transtibial prosthesis monocoque design. The design of the prosthesis integrates 3D imaging, modelling and optimization techniques coupled with additive manufacturing. Findings The successful fabrication of a functional monocoque prosthesis through 3D printing indicates the workflow may be a solution to the worldwide accessibility crisis. The digital workflow developed in this work offers great potential for providing prosthetic devices to rural communities, which lack access to skilled prosthetic physicians. The authors found that using the workflow together with 3D printing, this study can create custom monocoque prostheses (Figure 16). These prostheses are comfortable, functional and properly aligned. In comparison with traditional prosthetic devices, the authors slowered the average cost, weight and time of production by 95%, 55% and 95%, respectively. Social implications This novel digital design and manufacturing workflow has the potential to democratize and globally proliferate access to prosthetic devices, which restore the patient’s mobility, quality of life and health. LIMBER’s toolbox can reach places where proper prosthetic and orthotic care is not available. The digital workflow reduces the cost of making custom devices by an order of magnitude, enabling broader reach, faster access and improved comfort. This is particularly important for children who grow quickly and need new devices every few months or years, timely access is both physically and psychologically important. Originality/value In this manuscript, the authors show the application of digital design techniques for fabricating prosthetic devices. The proposed workflow implements several advantageous changes and, most importantly, digitally blends the three components of a transtibial prosthesis into a single, 3D printable monocoque device. The development of a novel unibody transtibial device that is properly aligned and adjusted digitally, greatly reduces the number of visits an amputee must make to a clinic to have a certified prosthetist adjust and modify their prosthesis. The authors believe this novel workflow has the potential to ease the worldwide accessibility crisis for prostheses.

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Case study: Sonic effect of product setup on perceived quality: an approach to home appliance design

Noise Control Engineering Journal ◽

10.3397/1/376732 ◽

2019 ◽

Vol 67 (5) ◽

pp. 373-379

Author(s):

Sasan Ghaffari ◽

Hassan Sadeghi Naeini ◽

Karmegam Karuppiah ◽

Aminreza Shokouhi ◽

Saba Beizaei

Keyword(s):

Delphi Method ◽

Manufacturing Process ◽

Perceived Quality ◽

Dramatic Effect ◽

Design And Manufacturing ◽

Home Appliance ◽

Two Phases

This study focuses on the correlation between home appliance products' setup sound and users' perceived sense of reliability and quality. â–œSetup soundâ–? stands for the click sound emitted by the components involved in the use of the products. Research was conducted through a survey of 15 participants' experiences in two phases: first while interacting with our three case products and then while merely listening to their setup sounds. As an outcome, we were able to figure out how particular product sound attributes affect perceived senses of reliability and quality in users. Using the Delphi method, further investigation was conducted regarding the user's perceptions through suggesting and analyzing some other factors. Based on this study, setup sound can have a dramatic effect on user's perceived sense of reliability in some cases, although it cannot be considered as the single contributing factor to an effective setup. For a perception of reliability and quality to be properly conveyed to the users, a cohesive set of affecting features must be considered and accurately imbedded in the design and manufacturing process.

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Perancangan dan Pembuatan Alat Bantu Meja Putar untuk Mesin Cnc 4 Axis

Jurnal Riset Teknologi Industri ◽

10.26578/jrti.v10i2.2568 ◽

2016 ◽

Vol 10 (2) ◽

pp. 162-171

Author(s):

Hafid Hafid ◽

Tatang Sutisna

Keyword(s):

Processing Time ◽

Rotary Table ◽

Engineering Process ◽

Cnc Machine ◽

Economical Analysis ◽

Machining Center ◽

Design And Manufacturing ◽

The Cost ◽

Productivity And Competitiveness

The design and manufacturing of the rotary table with the specification Ø 170 mm (6 inches) for CNC machine 4 axis has been done. The objective of manufacturing a rotary table is to increase the efficiency of CNC machine Hardford 4 axis to be above 80% in line machining center CV. IM’s workshop. The engineering methods was taken, consist of: working preparation, manufacturing of working drawing, engineering process, the manufacturing and testing. The prototype has been tested and operated, the resulting of increasing productivity of which were as follows: the process of assembling was increased to be 3 time ( before 1 time) and processing time for a specific case reduced from 5 hours to 3 hours, number of operators for the case of assembling the rotary reduced to 1 person (before 4 persons), safety and security become to be better. The results show increased efficiency of CNC machine Hardford, from under 50% to be above 80%. Based on the economical analysis obtained by the cost of good sold (C.G.S) of the rotary table is IDR 34.060.000. The results presented in this paper is expected to be case study for developing a business of the metal and engineering SMEs domestic to the effort of improving efficiency, quality, productivity and competitiveness in global market.ABSTRAKPerancangan dan pembuatan alat bantu meja putar (rotary table) dengan spesifikasi teknis Ø 170 mm (6 inci) untuk mesin CNC 4 axis telah dilakukan. Tujuan pembuatan rotary table adalah untuk meningkatkan efisiensi mesin CNC Hardford 4 axis di atas 80% pada line machining center Bengkel CV. IM. Metode rancang bangun yang dilakukan, meliputi: persiapan kerja, pembuatan gambar kerja, proses engineering, pembuatan dan uji coba. Prototip tersebut telah diuji coba dan dioperasikan dengan hasil peningkatan produktivitas sebagai berikut: proses pengerjaan bongkar pasang meningkat menjadi 3 kali (sebelumnya 1 kali) dan waktu pengerjaan untuk kasus tertentu berkurang dari 5 jam menjadi 3 jam, jumlah operator untuk kasus bongkar pasang rotary berkurang menjadi 1 orang (sebelumnya 4 orang), keselamatan kerja dan keamanan menjadi lebih baik. Hasil peningkatan berupa efisiensi mesin CNC Hardford 4 axis dari sebelumnya di bawah 50% menjadi di atas 80%. Berdasarkan hasil perhitungan analisis ekonomi diperoleh harga pokok produksi (HPP) alat bantu meja putar adalah sebesar Rp. 34.060.000. Bahasan ini diharapkan menjadi contoh kasus bagi pengembangan usaha IKM logam dan mesin dalam negeri untuk meningkatkan efisiensi, mutu, produktivitas dan keunggulan daya saing di pasar global.Kata kunci: alat bantu meja putar, mesin CNC, harga pokok produksi

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