ENGINEERING NEWS IN BRIEF

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                  ENGINEERING NEWS IN BRIEF
                        E-Mail Newsletter

                               No.49
             Issued by the Asian TOP Panel, January 2006

           The Chinese Mechanical Engineering Society (CMES)
           The Institution of Engineers, Indonesia (PII)
           The Japan Society of Mechanical Engineers (JSME)
           The Korean Society of Mechanical Engineers (KSME)

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    According to the agreement made in the 2nd Asian TOP Panel Meeting,
the ENGINEERING NEWS IN BRIEF (E-mail newsletter) has now been edited
by the CMES for the year 2006.

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[Contents]

(1) 2006 International Forum on Welding Technologies in Steel Construction
    (Source: CMES)
(2) The 2006 International Mechanical Engineering Education Conference
    (Source: CMES)
(3) A Study on Muli-axis NC Machining Processes for Continuous Indexing Globoidal
     Cams (Source: CMES)
(4) Optimum Tool Path Generation for 5-Axis Control Machining Considering Change
     in Tool Attitude (Source: JSME)
(5) Ultra-high Acceleration and High-speed Linear Motor Mechanism That Can Move
     at Over 100G and 10m/s (Source: JSME)

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(1) 2006 International Forum on Welding Technologies in Steel Construction

2006 International Forum on Welding Technologies in Steel Construction (IFWT 2006) sponsored by Chinese Mechanical Engineering Society (CMES) and its Welding Institution will be held on May 12-15, 2006 in Beijing.
The Forum will focus on: the features and key technologies in welding manufacturing for steel constructions of architecture, bridge, locomotive and vehicle; new materials, new equipments and new technologies; standard system, industrial regulation and their applications; representative engineering achievements, special or key productions; environment protection, health effects, resource utilization and energy saving; welding quality inspection, non-destructive test, reliability and life evaluation; maintenance, repairing and mutuality technology in steel construction engineering and production; innovation in joint and allied technology in steel construction.
The Forum will be consisted of presentations, technical visit and picture exhibition. We are collecting papers for publishing proceedings while holding the forum, and the paper should be submitted to us before March 31, 2006.

For details, please contact with:
Ms. Wu Jing & Mrs. Yuan Tian
International Forum on Welding Technology
Chinese Mechanical Engineering Society (CMES)
46 Sanlihe Road. Beijing 100823, China
Tel: +86 10 6859 4821 / 6859 4819 Fax: +86 10 6853 3613
Email: wuj@cmes.org, tianyuan@cmes.org

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(2) The 2006 International Mechanical Engineering Education Conference

The 2006 International Mechanical Engineering Education Conference under the joint sponsorship of the Chinese Mechanical Engineering Society (CMES) and the American Society of Mechanical Engineers (ASME) will be held on March 31 to April 4, 2006 in Beijing, China.
The theme of the conference is “Mechanical Engineering Education and Global Industry”, with its five major plenaries: “Engineer 2020 Global Perspectives”, “Innovation & International Collaboration in Graduate Education & Research”, “Undergraduate Education & International Collaboration”, “Global Industry / University Partnerships”, “Accreditation Practices around the Globe”.
During the 2006 International ME Education Conference, the conference will allow time for the matched institutions to get together and begin communication in the International Partnership Program (IPP). Participants will be invited to the International Forum and an exhibit hall of invited paper presentations and university and company exhibits.
Please announce this event among your members concerned and encourage them to
join with us in Beijing’s early spring. We anticipate that this meeting will be the largest gathering of Mechanical Engineering Deans, Department Heads, and faculty leaders ever assembled. For more information,

please visit http://www.asmeconferences.org/meed2006.

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(3) A Study on Muli-axis NC Machining Processes for Continuous Indexing Globoidal      Cams

Hu Zihua Zhang Ping, Xiangtan University

The profile equations for defining spatial indexing globoidal cams were deduced by spatial tooth principle. Processes for four-axis NC machining and five axis NC machining were respectively developed systematically based on generating method and resembling freeform surface method. One of spatial indexing globoidal cams was successfully milled by applying the above multi-axis machining methods for developing a NC rotary table with high mechanical properties. It is founded the massive basis for comprehensive research on CAD/CAM CNC integrated system for continuous indexing globoidal cams.

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(4) Optimum Tool Path Generation for 5-Axis Control Machining Considering Change
     in Tool Attitude

Koichi MORISHIGE, The University of Electro-Communications

The 5-axis control machining has a lot of advantages in the machining of complex shapes. The major problem in 5-axis control machining is the tool interference with workpiece. Some commercial 3-dimensional CAM software is already offered, which considers the tool interference problem and allows us the interference-free 5-axis control machining. However, the policy of the above CAM software to the tool interference avoidance is that the tool attitude is modified only where the tool interference is detected.
Thus, the tool attitude suddenly changes with the redundant movement. Because such movement causes over and under cutting, it should be avoided as much as possible. We have already proposed a tool path generation method for 5-axis control machining using an original configuration space. In the latest study, tool attitudes after interference avoidance are decided by referring to configuration space information for the whole of machining surface. The continuousness of the tool attitude change in the direction of not only toolfeed but also pickfeed is considered, and the method for generating the cutter location data for the optimum 5-axis control machining is developed. As a result, the usefulness of the devised method is experimentally found.

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(5) Ultra-high Acceleration and High-speed Linear Motor Mechanism That Can Move
     at Over 100G and 10m/s

Kaiji SATO, Tokyo Institute of Technology

The linear motion mechanisms play important roles in industrial machines and the importance of their acceleration and velocity performances is recently increasing. The linear motor mechanism in this research is designed so that the mechanism can move at over 100G(980m/s2) for industrial machine, from practical standpoint. For the design, the effects of part shape and assemble errors, and the performance limitation of power supply systems are considered. The maximum applied currentand voltage are set to 20A and 280V, respectively. This is a PM linear synchronous mechanism.
The experimental linear motor mechanism has 1.5m working range and generates thrust larger than 4400N. The mechanism can move at over 100G and 10m/s. Precision positioning controllers are designed for themechanism and the positioning performance is evaluated experimentally.

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Editor : Tian Ruizhu
           The Dept. of Internationa Affairs
           Chinese Mechanical Engineering Society