Substrate Optimization for Hybrid Manufacturing

Volume 2A: 45th Design Automation Conference ◽

10.1115/detc2019-98068 ◽

2019 ◽

Author(s):

Brandon R. Massoni ◽

Matthew I. Campbell

Keyword(s):

Additive Manufacturing ◽

Manufacturing Process ◽

State Of The Art ◽

Cost Effective ◽

Hybrid Manufacturing ◽

Viable Option ◽

New Approach ◽

Process Plans ◽

Type Size ◽

Effective Additive

Abstract While advances in metals additive manufacturing continue to make additive a viable option in more scenarios, these processes are generally slower and more expensive than subtractive methods, like machining. The combination of both additive and subtractive, often called hybrid manufacturing, can be used to get the benefits of both processes, while reducing cost. However, dividing a part into the most cost effective additive and subtractive features is often time-consuming and non-intuitive. In this paper, we present a new approach that optimizes the type, size, and position of a substrate within a part. The resulting hybrid manufacturing configuration enables engineers to reach the most cost-effective compromise between additive and machining. A fully implemented method has been developed and tested on several realistic engineering parts. The results are intuitively useful and push the state-of-the-art forward in generating hybrid manufacturing process plans.

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Evaluation and Optimization of a Hybrid Manufacturing Process Combining Wire Arc Additive Manufacturing with Milling for the Fabrication of Stiffened Panels

Applied Sciences ◽

10.3390/app7121233 ◽

2017 ◽

Vol 7 (12) ◽

pp. 1233 ◽

Cited By ~ 18

Author(s):

Fang Li ◽

Shujun Chen ◽

Junbiao Shi ◽

Hongyu Tian ◽

Yun Zhao

Keyword(s):

Additive Manufacturing ◽

Manufacturing Process ◽

Hybrid Manufacturing ◽

Stiffened Panels ◽

Wire Arc Additive Manufacturing

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State of the Art on Robust Design Methods for Additive Manufacturing

Lecture Notes in Mechanical Engineering - Advances on Mechanics, Design Engineering and Manufacturing III ◽

10.1007/978-3-030-70566-4_14 ◽

2021 ◽

pp. 80-85

Author(s):

Youssef Malyani ◽

Myriam Orquéra ◽

Dominique Millet

Keyword(s):

Additive Manufacturing ◽

Robust Design ◽

Manufacturing Process ◽

State Of The Art ◽

Design Methods ◽

Complex Geometries

AbstractAdditive Manufacturing (AM) technologies allow to produce functional parts with complex geometries that cannot be manufactured by conventional processes. However, the complexity of the product is increased and causes new constraints in the manufacturing process. Therefore, these new processes lead particularly to new needs in design methods. The objective of this paper is to explore and form an overall view of design methods, especially, robust design (RD) methods. Robust design is defined here as a methodology that enables to design a product with optimal performances and insensitivity to small variations of the inputs of the manufacturing process. In this contribution a state of the art of robust design methods applied to AM will be carried out.

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Automated post machining process planning for a new hybrid manufacturing method of additive manufacturing and rapid machining

Rapid Prototyping Journal ◽

10.1108/rpj-04-2017-0057 ◽

2018 ◽

Vol 24 (7) ◽

pp. 1077-1090 ◽

Cited By ~ 3

Author(s):

Niechen Chen ◽

Prashant Barnawal ◽

Matthew Charles Frank

Keyword(s):

Additive Manufacturing ◽

Process Planning ◽

Manufacturing Process ◽

Machining Process ◽

Hybrid Manufacturing ◽

High Quality ◽

Content Type ◽

Machining Process Planning ◽

Quality Surface ◽

High Quality Surface

PurposeThe purpose of this paper is to present a new method for automated post machining process planning for a hybrid manufacturing process. The manufacturing process is expected to generate complex functional parts by taking advantage of free form surface creation from additive manufacturing and high-quality surface finishing from CNC milling. Design/methodology/approachThe hybrid process starts with additive manufacturing to generate a near net shape part with pre-defined machining allowances on surfaces requiring high quality surface or tight tolerances, along with integrated fixture geometry. The next step is to conduct automated machining process planning to determine critical parameters such as setup angle, tool selection, depth, tool containment, and consequently, the NC code to machine the part. FindingsThis method is shown to be a feasible solution for rapidly creating functional parts. The tests have been conducted to validate the method developed in this paper. Originality/valueThis paper introduces a new automated post machining process planning method for integrating additive manufacturing with a rapid milling process.

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In Search of a Better Heuristic Algorithm for Simplification of Switching Function - A Challenge to ESPRESSO

INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY ◽

10.24297/ijct.v3i1b.2752 ◽

2012 ◽

Vol 3 (1) ◽

pp. 121-126

Author(s):

Subhajit Guha ◽

Uma Mitra ◽

Pinki Dey ◽

Samar Sen Sarma

Keyword(s):

Heuristic Algorithm ◽

Heuristic Algorithms ◽

State Of The Art ◽

Fitness Function ◽

Minimum Cost ◽

Cost Effective ◽

Switching Function ◽

Combinatorial Explosion ◽

New Approach ◽

Intractable Problem

Finding minimum cost switching function is a n intractable problem. The number of prime implicant of a typical switching function is of the order of 3n [5][13]. When fitness function with respect to cost is the only goal, the existing algorithms require faces combinatorial explosion [20]. The allurement of approximation and heuristic algorithms in this area has already generated ESPRESSO algorithm. We find that our algorithm presented here is at least equal or more cost effective than the ESPRESSO algorithm. The paper shows a new approach for attainment of our claim. We hope the algorithm presented here is a new attachment to the existing state of the art technology.

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On-line and Off-line Strategies for Preventing Depression

European Psychiatry ◽

10.1016/s0924-9338(09)70483-3 ◽

2009 ◽

Vol 24 (S1) ◽

pp. 1-1

Author(s):

F. Smit ◽

P. Cuijpers

Keyword(s):

Population Health ◽

Disease Burden ◽

Cost Effective ◽

Preventive Interventions ◽

Viable Option ◽

Substantial Impact ◽

New Approach ◽

Self Help ◽

On Line ◽

New Strategies

Depression is associated with a formidable disease burden and has substantial economic ramifications. Its burden can only be partially alleviated through treatment. To make a more substantial impact on population health, we need primary prevention to reduce the number of new cases, and we need to do a better job about preventing relapses and recurrences. In this symposium we will present the latest evidence that prevention is a viable option: it is effective and cost-effective when offered as CBT-based self-help (bibliotherapy), and as preventive cognitive therapy for relapses and recurrences. The last couple of years witnessed a new approach to improving population health when some of these preventive interventions became available as internet-based interventions. These on-line interventions can be well structured and conducted either as pure self-help or with support by a therapist. We assume that on-line interventions are acceptable, because people can access these interventions in the privacy of their homes, at times they find convenient, and at a pace that suits them best. We also expect that these interventions can be cost-effective, especially when offered as self-help. Finally, we expect that on-line interventions have great potential to reach many people. It is therefore interesting to outline some of these new strategies and present evidence of their (cost) effectiveness.

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Manufacturing custom-contoured wheelchair seating: A state-of-the-art review

Prosthetics and Orthotics International ◽

10.1177/0309364619836028 ◽

2019 ◽

Vol 43 (4) ◽

pp. 382-395 ◽

Cited By ~ 2

Author(s):

Susan Nace ◽

John Tiernan ◽

Aisling Ní Annaidh

Keyword(s):

Additive Manufacturing ◽

Literature Review ◽

State Of The Art ◽

Cost Effective ◽

Manufacturing Processes ◽

Cnc Milling ◽

Wheelchair Users ◽

Pressure Injury ◽

Alternative Seating ◽

Seat Insert

Background:Custom-contoured wheelchair seating lowers risk of pressure injury and postural deterioration while custom-contoured wheelchair seating lowers risk of pressure injury and postural deterioration while increasing the stability and functional activity of the wheelchair occupant. Producing custom-contoured seating systems has historically been a labour-intensive process custom-contoured seating systems is historically labour-intensive.Objectives:Evaluate the strengths and limitations of current manufacturing processes for custom-contoured wheelchair seating to suggest potential future manufacturing processes.Study Design:Literature review of the state of the art.Methods:Research conducted through a literature review focused on the performance of different types of custom-contoured wheelchair seating products and processes over the last 40 years. Recent literature in orthotics and prosthetics was also consulted to assess future trends in seating.Results:There are five main manufacturing processes currently used to produce custom-contoured wheelchair seating systems. No single process is yet suitable for all wheelchair users, but many manufacturers are transitioning to computer numerical controlled (CNC) milling to reduce manual labour. Adjustable micro-modular seating and moulded seat insert manufacturing are also prevalent and offer alternative seating to soft foam carving.Conclusion:There is a need in the custom wheelchair seating sector for processes that are fast, cost-effective, produce little to no material waste, and that can effectively maintain a comfortable seating micro-climate. Additive manufacturing may meet these criteria, but further evaluation is required.Clinical relevanceThis review suggests that the custom-contoured wheelchair seating manufacturers are moving away from labour-intensive processes towards digital techniques, like CNC foam milling. Additive manufacturing is a potential new process that may reduce overall costs, the lead time in preparing seats and has the potential to better manage the seating micro-climate.

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New Approach to Non-invasive Visualisation of Cardiac Function – Riskfree Test Can Provide Fast, Cost-effective Diagnosis

European Cardiology Review ◽

10.15420/ecr.2006.1.1t ◽

2006 ◽

Vol 2 (1) ◽

pp. 1

Author(s):

CardioMag Imaging

Keyword(s):

Cardiac Function ◽

Cost Effective ◽

New Approach ◽

Non Invasive ◽

Effective Diagnosis

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Janus – A New Approach to Air Combat Pilot Training

Transactions on Aerospace Research ◽

10.2478/tar-2019-0019 ◽

2019 ◽

Vol 2019 (4) ◽

pp. 7-22

Author(s):

Georges Bridel ◽

Zdobyslaw Goraj ◽

Lukasz Kiszkowiak ◽

Jean-Georges Brévot ◽

Jean-Pierre Devaux ◽

...

Keyword(s):

Low Cost ◽

Cost Effective ◽

High Energy ◽

Training System ◽

Embedded Sensors ◽

Pilot Training ◽

New Approach ◽

Combat Aircraft ◽

Air Combat ◽

The Cost

Abstract Advanced jet training still relies on old concepts and solutions that are no longer efficient when considering the current and forthcoming changes in air combat. The cost of those old solutions to develop and maintain combat pilot skills are important, adding even more constraints to the training limitations. The requirement of having a trainer aircraft able to perform also light combat aircraft operational mission is adding unnecessary complexity and cost without any real operational advantages to air combat mission training. Thanks to emerging technologies, the JANUS project will study the feasibility of a brand-new concept of agile manoeuvrable training aircraft and an integrated training system, able to provide a live, virtual and constructive environment. The JANUS concept is based on a lightweight, low-cost, high energy aircraft associated to a ground based Integrated Training System providing simulated and emulated signals, simulated and real opponents, combined with real-time feedback on pilot’s physiological characteristics: traditionally embedded sensors are replaced with emulated signals, simulated opponents are proposed to the pilot, enabling out of sight engagement. JANUS is also providing new cost effective and more realistic solutions for “Red air aircraft” missions, organised in so-called “Aggressor Squadrons”.

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