Session: 06-01-01 Product And Process Design

Paper Number: 89080

89080 - Dynamic Design of Machines Sub-Assemblies : A New Original Approach 

Modern Machine Designs have not only to be pursued on many different antagonist technical constrains types (The complexity of the multifactorial "inverse problem" of machines design) in order to meet their "technical viability" and "technical reliability" and also to meet the potentially targeted budget (or the “minimum technically safe reachable budget”), they have also more and more to de delivered within a given shorter and shorter period of time: they are thus subjected to “availability constrains”. To try to solve the first technical requirements, some authors analyzed in details the Design Process and tried to synthesize it through some original approaches (House of Quality QFD, TRIZ, Double Diamond, …). Some very useful methods are especially described in the German Standard VDI 2221 to VDI 2223 and based on the work of PAHL & BEITZ, 1996. They were also later completed by a cost approach to assess the Product Design Budget (VDI 2225, 1998), the goals being to adequately and systematically qualify the technical and the economical relevance of new Designs by identifying and weighting their requested main and auxiliary functions. Nevertheless, those methods are mainly valid for "unique designs", “product design at large” of medium to high value goods or machinery, developed in “non competitive environments”. The nowadays highly stressed competitive environments are pulling down (sometimes drastically) the targeted or attended budgets and also very often shorten the requested and contractual delivery times. To be able to answer such a “Machine Design Challenge” she or he faces, the Designer should, at the minimum, be highly skilled or long terms experienced in the discipline, make use of what is sometimes called “Catalog Parts based Design” and/ or at least, be able to find some “design parades” for meeting the overall Design Problem objectives and constraints. Based on the original concept of the ”generalized safety ratios”, the current work intends to completely revisit the "Details Design Phase" in order to structure a systematic, rational and fast design procedure in the way of a new “design heuristic”. This heuristic initiated on the customer specification by specific components selection criteria also allows the fast and methodologic treatment of "variation designs" by the exploitation of a combinatory design scheme of the different selected machine elements. The algorithmic steps here followed reduced also quickly “a large design solution space” of potential solutions into a shorter one of “admissible design combinations” and leads to a “Designer's Design Dashboard” fed by different sets of useful technical, economical and availability KPI's allowing, in such a way, to the Designer to get a clear and dynamique view of the constraints she or he should potentially release or strengthen to try to find a solution to her or his “Machine Design Problem”. This Dashboard also helps the Designer to approach the “optimal solution” to this overall technically, economically and timely constrained Machine Design Environment. A typical industrial case study of a Machine Sub-Assembly will illustrate the Methodology followed here.

Presenting Author: Pierre DUPONT Schaeffler Group - UMONS Faculté Polytechnique de MONS (FPMs)

Presenting Author Biography: Please See &quot;ASME Referral Drive&quot; for Bio.<br/><br/>MS Mechanical Engineering from University of MONS (UMONS Polytechnics), MONS Belgium<br/>DEA in Applied Sciences from University of LOUVAIN, Belgium <br/>Executive Master in Business Administration from Free University of BRUSSELS, BRUSSELS, Belgium<br/>25 Years of Professional Machine Design Experience for the Schaeffler Group, Germany &amp; Belgium, EU<br/>12 Years of Lecturer of &quot;Machine Design Projects&quot;, UMONS, Faculty of Engineering (FPMs) <br/>Scientific &amp; Technical Collaborator at UMONS, Faculty of Engineering (FPMs) - Machine Design Chair &amp; Material Sciences Chair<br/><br/>Many thanks.

Authors:

Pierre DUPONT Schaeffler Group - UMONS Faculté Polytechnique de MONS (FPMs)