Framework for Developing Engineering Standards to Obviate Inefficient Trial and Error in Design Process of Engineering Plastic Parts

2021 ◽  
Vol 54 (6) ◽  
pp. 283-303
Author(s):  
Tomohiko Shibata ◽  
Tetsuo Fuchino
Keyword(s):  
Design Process ◽  
Trial And Error ◽  
Engineering Plastic ◽  
Engineering Standards ◽  
Plastic Parts

Mold Flow-Based Mold Flow Analysis of Copier Parts and its Solution Optimization

2012 ◽  
Vol 538-541 ◽  
pp. 1072-1075
Author(s):  
Jun Kai Yang ◽  
Yun Jie Xu
Keyword(s):  
Product Quality ◽  
Design Process ◽  
Flow Analysis ◽  
Production Costs ◽  
Improve Product Quality ◽  
Cooling Process ◽  
Mold Flow Analysis ◽  
Product Design Process ◽  
Plastic Parts ◽  
Mold Flow

Mold flow software is used to conduct mold flow analysis of copier parts, simulate its filling and cooling process, and predict possible defects in the product design process in order to determine the formability of plastic parts and product quality. The optimal mold structure can be obtained by comparing different solutions so as to save production costs and improve product quality and efficiency.

Non-Linear Description of Floating Ring Bearings Rotordynamics

2005 ◽  
Author(s):  
S. E. Di´az ◽  
R. Castro
Keyword(s):  
Design Process ◽  
Period Doubling ◽  
Trial And Error ◽  
Flexible Rotor ◽  
Manufacturing Costs ◽  
Numerical Characterization ◽  
Linear Description ◽  
Non Linear ◽  
Shaft Flexibility

Floating ring bearings are commonly used in automotive turbochargers for their low manufacturing costs. However, the strong non-linearity of this configuration prevents the use of traditional rotordynamic techniques to describe their behaivior, thus relegating its design process to a costly trial and error process. A numerical characterization of this non-linearity is hereby presented for a flexible rotor supported on two FRBs. Non-linear techniques such as Poincare´ and Bifurcation maps, along with traditional rotordynamic techniques, show ranges of periodic, quasiperiodic, and chaotic motion, being the most stable ones related to high unbalance and/or low speeds, though in some cases the periodicity of the motion is reestablished at higher speeds. In all cases chaos is reached through a period doubling route. Shaft flexibility is shown to retard the occurrence of chaos, while excitation of conical motion seems to favor it.

What Engineering Designers Leave Behind: Developing a Cognitive Coding Scheme for Student Design Journals

2010 ◽  
Author(s):  
Sophoria Westmoreland ◽  
Linda C. Schmidt
Keyword(s):  
Design Process ◽  
Cognitive Processes ◽  
Limited Resources ◽  
Engineering Practice ◽  
Trial And Error ◽  
Coding Scheme ◽  
Innovative Solutions ◽  
Design Documentation ◽  
Problem Solving Strategies ◽  
Real World Problems

Some historically successful engineering inventions have been designed by trial and error as was the famous case of Thomas Edison’s light bulb. No contemporary design researcher would advocate a tedious, trial-and-error methodology as the basis for engineering practice. The 21st century engineer is expected to create innovative solutions to real world problems with limited resources and limited time. Successful engineering design methods are those that substitute trial-and-error with practice-based guidance (e.g., TRIZ), mathematical analysis (e.g., optimization), general problem-solving strategies (e.g., functional decomposition and synthesis), or good cognitive thinking strategies (e.g., Synectics). This research is placed in the last category, studying the cognitive processes that can be observed in recorded work of engineering designers. This study is the first step in research intended to go further into the designers mind and reveal new insights about the design process. This paper presents a cognitive coding scheme model to organize and categorize designer “thinking” as recorded in design documentation. The product of this research can be used to instruct curriculum on teaching the design process for students and professional engineers.

Design and Implementation of a MEMS Design Process Description Language- MDPDL

2009 ◽  
Vol 16-19 ◽  
pp. 358-362
Author(s):  
Xiang Tong Yan ◽  
Ping Yu Jiang
Keyword(s):  
Design Process ◽  
Mechanical Design ◽  
Design Flow ◽  
Document Type Definition ◽  
Trial And Error ◽  
Description Language ◽  
Time To Market ◽  
Document Type ◽  
Design And Implementation ◽  
Type Definition

For the complexity and miniaturization of MEMS, MEMS design process is extremely different from general mechanical design process. Commonly the design flow is dominated by “trial-and-error” methods. It is necessary to describe design process of MEMS for reuse. This will help to reduce the number of redesigns and thus decrease the time to market. Based on XML and necessary extensions being made, a MEMS design process description language, called MDPDL, is presented and the syntax and implementation are discussed in detail. The Document Type Definition (DTD) is adopted to define the syntax rules for the tags of MDPDL, considering core activities and related resources of MEMS design process. Finally, an implementation case has been given out to illustrate the efficiency of MDPDL.

An Evaluation of Trial-and-Error Optimal Design Process

2003 ◽  
Vol 2003.13 (0) ◽  
pp. 86-89
Author(s):  
Kazuyuki HANAHARA ◽  
Yukio TADA
Keyword(s):  
Optimal Design ◽  
Design Process ◽  
Trial And Error

A Case Study of Design Process and Development of a Design Enabling Tool for Wright Metal Products

2007 ◽  
Author(s):  
Madhusudan Kayyar ◽  
Joshua D. Summers ◽  
Farhad Ameri ◽  
Sherrill Biggers
Keyword(s):  
Design Process ◽  
Case Based Reasoning ◽  
Trial And Error ◽  
Engineering Analysis ◽  
Rule Based ◽  
Current Design ◽  
Special Expertise ◽  
Metal Products ◽  
Case Based

This case study investigates the design process followed by a small to medium scale enterprise (SME) that primarily depends on special expertise in the form of a few key individuals, who design products mainly based on past experience, augmented by trial and error. This is an inefficient, time consuming, and expensive way of designing products and evaluating their performance. This led to development of a specialized and affordable design enabler that facilitates engineering analysis, noticeably absent in SME’s current design process. Further, the design enabler forms the foundation for extending the scope to include rule-based systems, optimization and case based reasoning that would assist designers in efficient product development.

Juice Extractor Stent Plastic Mould Structure Design

2012 ◽  
Vol 214 ◽  
pp. 173-176
Author(s):  
Xiu Zhong Cao
Keyword(s):  
Design Process ◽  
Cooling System ◽  
Exhaust System ◽  
Structure Design ◽  
Mold Design ◽  
Gating System ◽  
Board Type ◽  
Slide Block ◽  
Plastic Parts ◽  
Plastic Mould

The design of plastic parts structure analysis, confirmed the mould adopts the exactly two cavities, with two points type surface, three board type injection molds. Exhaust systems use the parting surface and lateral slide block clearance, plunger, cooperate with clearance to exhaust, and using a runner filling mold overall layout form. In the mold design process, the design of classification, gating system, exhaust system, cooling system, demoulding mechanism, are introduced in this paper.

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