June 2008

Cognitive and systematic design

MM (Modern Machinery) Science Journal, June 2008
W. Ernst EDER
Royal Military College of Canada (retired),
Kingston, Ontario, Canada

Following a lively discussion at the AEDS-SIG Workshop 2005, I had the pleasure of reading the doctoral thesis by Kalevi Nevala [2005a]. The following is a summary and interpretation of comments I made to Dr. Nevala. In discussions or considerations of design engineering problems and engineering designers, different words are often used. Designing is a process of transforming information about a future technical process and/or technical system, performed by iterative interacting between external representations and mental models. My comments are based on the pioneering work of Vladimir Hubka [1974, 1976, 1978, 1982, 1984, 1988a, 1988b, 1992 and 1996] with additions [Eder 1992, 1996 and 2008].

Keywords: cognitive approaches, systematic and methodical approaches
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Numerical and analytical modelling of a pallet used at a machining centre at high speed

MM (Modern Machinery) Science Journal, June 2008
Lubomír Novotný, Jiří Marek
Toshulin, a. s., Design department, Hulin, Czech Republic

A workpiece manipulation assembly includes two main parts. 1. A base permanently connected to a spindle. 2. A pallet manipulated by a rotary manipulation table from working place to setting place & vice versa. This assembly is rotating around the spindle axis. The FEM analysis and analytical analysis of the workpiece exchange manipulation system of vertical turning centre, deals with stress and deformation of an assembly that is composed by the base, the palette and the other parts, at high revolution load. As requirements of customers increase – revolutions of the workpieces increase. This leads to increase the load of parts.

Keywords: machine tool, high speed, workpiece pallet exchange, FEM
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Problem of metamorphic structures in service robotics

MM (Modern Machinery) Science Journal, June 2008
Technical University of Kosice, Faculty of Mechanical Engineering,
Department of Production Technique and Robotics, Kosice, Slovakia

Recent trends in the development of robots confirm that the concept of metamorphic – self-regulating structures has found its recent form in theoretical as well as practical robotics. This development direction is topical also for service robotics where the effects of this concept can be used more intensively in the benefit of utility features of service robots. The paper shows theoretical and design approaches to the solution of metamorphic service robots. It gives selected specific questions and problems connected with its design and construction. It submits the studies and designs of service robots solved on the principle of metamorphic – self-regulating structures.

Keywords: robot, functional structure, kinematic structure, ametamorphic structure, module
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Exploring Efficiency of Tool Coating via Deep Drawing of Cylindrical Cups

MM (Modern Machinery) Science Journal, June 2008
Jaromir AUDY1, Emil EVIN2
1Edith Cowan University, School of Enterprise and Technology, Bunbury, Australia
2Technical University Kosice, Kosice, Slovakia

The present investigation was set up to examine both predicted and experimental values of forces, power, press work and friction in drawing cups from low carbon steel blanks using the same die set but in different uncoated and TiN coated conditions. The results showed a good agreement between predicted and experimental values. In addition, the findings demonstrated that the TiN coated tools reduced the friction at a tool – blank – die – interface (by about 5%), which in turn reduced the forces, power and work (by about 7%) and improved the final product quality, when compared to the performance of uncoated tools.

Keywords: deep drawing, cylindrical cups, tool geometry, tool surface treatment, steel blanks, forces, work, power, friction, product quality
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