A study of LCA : Exammation of environmental load by a difference of a design and manufacturing process

2002 ◽  
Vol 2002.40 (0) ◽  
pp. 307-308
Author(s):  
Yukitatsu KASHIMURA ◽  
Hiroaki SAITO
Keyword(s):  
Manufacturing Process ◽  
Environmental Load ◽  
Design And Manufacturing

DESIGN AND MANUFACTURING PROCESS OF A UAV COMPOSITE WING SPAR

2018 ◽  
Author(s):  
Pablo M. N. Araujo ◽  
Thiago R. Costa ◽  
Eduardo C. Silva
Keyword(s):  
Manufacturing Process ◽  
Design And Manufacturing ◽  
Wing Spar ◽  
Composite Wing

The Bus Factor in Conceptual System Design: Protecting a Design Process Against Major Regional and World Events

2021 ◽  
Author(s):  
Douglas L. Van Bossuyt ◽  
Ryan M. Arlitt
Keyword(s):  
System Design ◽  
Design Process ◽  
Manufacturing Process ◽  
Storage System ◽  
Disease Outbreaks ◽  
Industrial Sector ◽  
Conceptual System ◽  
Design And Manufacturing ◽  
Renewable Energy Generation ◽  
Virtual Events

Abstract We introduce a method to help protect against and mitigate possible consequences of major regional and global events that can disrupt a system design and manufacturing process. The method is intended to be used during the conceptual phase of system design when functional models have been developed and component solutions are being chosen. Disruptive events such as plane crashes killing many engineers from one company traveling together, disease outbreaks killing or temporarily disabling many people associated with one industrial sector who travel to the same conference regularly, geopolitical events that impose tariffs or complete cessation of trade with a country that supplies a critical component, and many other similar physical and virtual events can significantly delay or disrupt a system design process. By comparing alternative embodiment, component, and low-level functional solutions, solutions can be identified that better pass the bus factor where no one disruptive event will cause a major delay or disruption to a system design and manufacturing process. We present a simplified case study of a renewable energy generation and storage system intended for residential use to demonstrate the method. While some challenges to immediate adoption by practitioners exist, we believe the method has the potential to significantly improve system design processes so that systems are designed, manufactured, and delivered on schedule and on budget from the perspective of significant disruptive events to design and manufacturing.

Robust Tolerance Design Considering Process Capability and Quality Loss

1999 ◽  
Author(s):  
Chang-Xue (Jack) Feng ◽  
Ravi Balusu
Keyword(s):  
Manufacturing Process ◽  
Lead Time ◽  
Process Capability ◽  
Concurrent Design ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Quality Loss Function ◽  
Capability Indices ◽  
Design And Manufacturing

Abstract Tolerance design bridges design and manufacturing. Concurrent design of tolerances and manufacturing processes may ensure the manufacturability, reduce the manufacturing and other related costs, decrease the number of fraction nonconforming (or defective rate), and shorten the production lead time. Since process capability indices relate tolerance specifications to manufacturing process capabilities, it is quite natural to apply them to concurrent design of tolerances and processes. As process shifts often exist in a manufacturing process, using Cp does not yield a good estimation of fraction nonconforming. Index Cpk does not precisely measure process shift either, but Cpm does. Therefore, this research compares the applications of Cp, Cpk and Cpm based on a numerical example of non-linear mechanical tolerance synthesis. In addition, the Taguchi quality loss function is used together with the manufacturing cost as the objective function.

scholarly journals Research on innovative design of a new rope knotter

2019 ◽  
Vol 11 (9) ◽  
pp. 168781401987832
Author(s):  
Yanmei Meng ◽  
Hao Chen ◽  
Yuan Liang ◽  
Johnny Qin ◽  
Qinchuan Zhao ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Success Rate ◽  
Manufacturing Process ◽  
Complex Structure ◽  
Large Angle ◽  
Innovative Design ◽  
Design And Manufacturing ◽  
Physical Tests ◽  
Gear Mechanism ◽  
Cycle Diagram

Aiming at the complex structure and high manufacturing process requirements of traditional knotter, this article proposes a new rope knotting method. Based on the knotting method, a knotter is designed to use a new mechanism which is made up of two new incomplete gear mechanisms to drive rope clamping mechanism and rope hooking and griping mechanism. First, a kinematic cycle diagram of the knotter is determined, and the structures of each key mechanism are designed. Then, a virtual prototype of the knotter is established by Unigraphics and imported into Automated Dynamic Analysis of Mechanical Systems to analyze the kinematic of each key mechanism. The success rate is 98.4% through 500 physical tests on the physical model of the knotter. The results indicate that the knotting method is reliable. The knotter can meet the requirements of structure, posture, and coordination during knotting process. The new knotter has no separate mechanism for cutting rope and tripping out of the rope buckle. Therefore, the structure is simplified and reduces the design and manufacturing difficulties. Furthermore, the new incomplete gear mechanism solves the problem that in the conventional incomplete gear mechanism, the driven gear can swing at a large angle or even cannot be locked in the case when the locking arc of the passive gear is too short.

scholarly journals Automotive leaf spring design and manufacturing process improvement using failure mode and effects analysis (FMEA)

2020 ◽  
Vol 12 ◽  
pp. 184797902094243
Author(s):  
Tauseef Aized ◽  
Muhammad Ahmad ◽  
Muhammad Haris Jamal ◽  
Asif Mahmood ◽  
Syed Ubaid ur Rehman ◽  
...  
Keyword(s):  
Failure Mode ◽  
Process Improvement ◽  
Manufacturing Process ◽  
Structural Member ◽  
Leaf Spring ◽  
Risk Priority Number ◽  
Human Safety ◽  
Leaf Springs ◽  
Design And Manufacturing ◽  
Quality And Reliability

Nowadays human safety and comfort are the most considerable parameters in designing and manufacturing of a vehicle, that is why every organization ensures the quality and reliability of components used in the vehicle. Leaf spring is also a component of vehicle which plays an important role in human safety and comfort. It acts as a structural member and an integral part of suspension system. It is important to eliminate the failures in designing and manufacturing process of leaf springs because of its importance in functionality and safety of vehicle. In this research, failure mode and effects analysis has been used to analyze and reduce the risks of 42 possible failures that can occur in automotive leaf spring. It starts from determining, classifying, and analyzing all potential failures and then rating them with the help numeric scores. The four numeric scores namely severity, occurrence, detection, and Risk Priority Number (RPN) are used to find the high potential failures of semi-elliptical leaf springs. In the end, actions are recommended for RPN greater than 250, to increase quality and reliably of product.

scholarly journals Influence of specimens' design and manufacturing process on microtensile bond strength to enamel: laboratory and FEA comparison

2010 ◽  
Vol 13 (2) ◽  
pp. 253-260 ◽  
Author(s):  
Fernanda Tranchesi Sadek ◽  
Antônio Muench ◽  
Isis Andréa Poiate ◽  
Edgard Poiate Junior ◽  
Paulo Eduardo Capel Cardoso
Keyword(s):  
Bond Strength ◽  
Manufacturing Process ◽  
Microtensile Bond Strength ◽  
Design And Manufacturing
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