Tutorials for 1996 ASME DET and CIE Conference

Expert Witnesses

Saturday, August 17, 2:00pm-5:00pm

Engineers and scientists have become very visable in the courtroom with the advent of the strict liability concept in tort law. The role of the engineer in this process is not generally understood by the technical community or the lay public. In this tutorial the participants will learn about the "behind the scenes" activities, and the part that the expert plays in the process, taught by two engineer- experts.

Organizers: Dr. H.J.Sneck, Professor Emeritus, Rensselaer Polytechnic Institute, Troy, New York. Dr S. Derby, Associate Professor, Rensselaer Polytechnic Institute, Troy, New York.

Process and Information Modeling: Applied to Business Process Re-engineering

Saturday, August 17, 2:00pm-5:00pm

Business Process Re-engineering efforts stress fundamental rethinking and radical simplification of processes to achieve dramatic improvements in measures of performance. Most re engineering revolves around part definitions, product structures, and integration with design and production activities. A coherent methodology to achieve these goals provides much needed structure while embarking on what is still a novel activity. In this tutorial, the students are introduced to the benefits of information modeling and process modeling and simulation techniques, and other enabling technology and implementation issues associated with BPR efforts. Specially emphasized are the similarities between many of the key elements of information and process modeling and what is often considered Best Practice in BPR. The analysis and design activities of BPR benefit significantly from the abstraction and modeling guidelines of successful information and process modeling.

Organizer: Dr. Ravi Rangan, Technical Director, SDRC Seattle Competence Center.

Spatial Mechanism Design

Sunday, August 18, 9:00am-12noon

In this tutorial a unified design theory for spatial 4C linkages is presented. This theory unifies the dyad synthesis of spatial 4C mechanisms, spherical 4R mechanisms, and planar 4R mechanisms. Moreover, it is shown that this design theory is a generalization of the well-known planar 4R design theory. The implementation of the design theory into computer-aided design software is presented: SPHINX for design of spherical 4R mechanisms; and SPADES for design of spatial 4C mechanisms. Furthermore, the manufacture of spatial and spherical linkages is discussed. Interactive graphics software, a mechanism design kit, and notes are provided to each participant.

Organizers: Dr. Pierre M. Larochelle, Assistant Professor, Department of Mechanical Engineering, Florida Institute of Technology.
Andrew P. Murray, Research Associate, Department of Mechanical Engineering, University of California, Irvine, J. Michael McCarthy, Professor, Department of Mechanical Engineering, University of California, Irvine.

Virtual Prototyping: Using Computer Simulations to Quickly Optimize System Designs

Sunday, August 18, 9:00am-12noon

This tutorial will demonstrate the virtual prototyping capabilities of Mechanical Dynamics' ADAMS software by address three common design problems: i) designing cams for an industrial packaging application; ii) designing the suspension system for a new automobile; and iii) designing a robot arm for a satellite servicing system. The tutorial will focus on the design aspects that require an understanding of how the component parts, as well as the complete system, will move. This includes analysis of contacts and collisions, flexibility, prescribed motions, and forced motions through visualization capabilities including animation, enhanced animation, sensor readouts, and plotting. The analysis techniques are applied, along with sensitivity studies and optimization, to achieve refined virtual product designs, undergoing a similar set of validation tests that a physical prototype would undergo.

Organizer: Patrick J. McNally, Director of Software Products, Mechanical Dynamics Inc.

A New Paradigm for Plastic Part Assembly (Snap Fits)

Sunday, August 18, 1:00pm-4:00pm

Integral Attachment Features are features formed into plastic parts that provide attachment between parts by establishing part location, transferring service loads, eliminating degrees of freedom, and absorbing tolerances. The two key attributes of an integral attachment are: i) that it be integral to a part, and ii) that its primary purpose be to provide some attachment functionality. The goal is to design snap fits as integral attachments to create fastenerless assemblies in plastic parts. This tutorial will present snapfits as a new paradigm for assembly. The nesting of plastic parts will be discussed as well as new information for the sizing of cantilever snap hooks. Part nesting is usually not considered or only considerd in a very ad-hoc manner.

Organizer: Dr. Anthony F. Luscher, Assistant Professor in the Department of Mechanical Engineering at Ohio State University.

Concurrent Engineering Fundamentals

Sunday, August 18, 1:00pm-4:00pm

The course gives you the fundamental techniques, concepts of Concurrent Engineering that is revolutionizing the manufacturing industry. It also describes the performance indicators to meeting the world class competitiveness challenges that industries are facing in 1990's. With Concurrent Engineering: Fundamentals, you will learn eight proven techniques to bring new products to market faster. The course features a Part on process reengineering to help you discover your company's strengths and weaknesses and techniques how to overcome them. You will learn on how to make improvements in key categories such as quality, cost effectiveness, DFX, responsiveness, customer satisfaction, etc. models, metrics and methodology.

Organizer: Dr. Biren Prasad, Senior Engineering Consultant, Electronic Data Systems (EDS), a subsidiary of General Motors.

Designing Mechanisms with LINCAGES

Sunday, August 18, 1:00pm-4:00pm

The computer can play an invaluable role in the design of mechanical linkages. The initial stage of computer-aided mechanism design is kinematic synthesis-the creation of the dimensions of the linkage that best fits the required task. This tutorial will concentrate on linkage synthesis, using several industrial examples to illustrate the power of these tools. The LINCAGES-4 software will be demonstrated. Computer methods allow the designer to explore thousands of solutions at a time yielding solutions in orders of magnitude faster than graphical or trail and error methods. The connection of kinematic synthesis to other kinematic and dynamic CAD tools will also be discussed.

Organizer: Dr. Arthur G. Erdman, P.E., a Professor in the Design and Manufacturing Division of Mechanical Engineering Department at the University of Minnesota.

Computational Geometry in Design, Manufacturing and Robotics

Sunday, August 18, 4:00-7:00pm

This course deals with continuous computational geometry and its applications in design, manufacturing and robotics. It covers the basic principles of Bezier and B-spline techniques but has a coverage that goes beyond curves and surfaces to include line trajectories, motions, and sweeps. The theory is applied to problems in design, manufacturing, and robotics. These include problems in design of power transmission equipment such as gears, Numerical Control Machining including non-conventional manufacturing operations such as Electric Discharge Machining, and Robotics path planning and programming. Examples from industrial applications are used throughout the course.

Organizers: Dr. Bahram Ravani, Professor, Department of Mechanical Engineering, University of California, Davis. Dr. Michael G. Wagner Assistant Professor, Institute of Geometry, Technical University of Vienna.

Introduction to Virtual Reality in Mechanical Design

Sunday, August 18, 4:00-7:00pm
Virtual reality can be seen as a logical evolution of existing human-computer interfaces. Virtual reality techniques attempt to remove the barriers of the traditional computer interface, consisting of the keyboard, monitor and mouse, and allow the user to experience the "reality" of a computer-generated scene. This computer technology holds the potential to revolutionize the way in which engineers rely on computers to help build, test, and verify designs. Some of the areas where VR can contribute to increase engineering productivity are in the areas of design, prototyping, design for maintenance and assembly, factory planning, networked design, and concurrent engineering.This tutorial explores the history of virtual reality, presents the enabling technologies needed to develop VR applications, and examines current applications of VR focused on engineering design.

Organizer: Dr. Judy Vance, Assistant Professor, Department of Mechanical Engineering at Iowa State University.

Tutorial Schedule

Saturday, August 17:

  1. Expert Witnesses, cost: $60.
  2. Process and Information Modeling: Applied to Business Process Re-engineering, cost: $60.

Sunday, August 18:

  1. Spatial Mechanism Design, cost: $90.
  2. Virtual Prototyping: Using Computer Simulations to Quickly Optimize System Designs, cost: $60.
  1. A New Paradigm for Plastic Part Assembly (Snap Fits), cost: $60.
  2. Concurrent Engineering Fundamentals, cost: $60.
  3. Designing Mechanisms with LINCAGES, cost: $60.
  1. Computational Geometry in Design, Manufacturing and Robotics, cost: $60.
  2. Introduction to Virtual Reality in Mechanical Design, cost: $60.

Stephen J. Derby
Associate Professor
DETC Tutorials Coordinator
518-276-6991, derbys@rpi.edu