ENGINEERING NEWS IN BRIEF
Issued by the Asian TOP Panel, June 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)
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.
(1) 2006 China Materials Week Will Be Held in Ningbo in November (Source: CMES)
(2) Test Investigation on Hydraulic Losses in Discharge Passage of Axial-flow pump
(3) New Method on Parametric Design of Addendum Binder Surface and Drawing
Process Complementary for Automotive Panel Rawing Die (Source: CMES)
(4) Development of Personalized Materials from Human Hair Proteins(Source: JSME)
(5) Wide area of Applications Using Microbubbles (Source: JSME)
(6) JSME the Executive Board Members (2006) (Source : JSME)
(7) Analysis of a Plate-type Piezoelectric Composite Unimorph Actuator Considering Thermal Residual Deformation (Source : KSME)
(8) The Prediction of Etching Characteristics Using Spray Characteristics in Etching Process of Lead-Frame (Source : KSME)
(9) Ubiquitous-Based Mobile Control and Monitoring of CNC Machines for
Development of u-Machine (Source : KSME)
(1)2006 CHINA MATERIALS WEEK WILL BE HELD IN NINGBO IN NOVENBER
2006 China Material Week (CMW), organized by Chinese Mechanical Engineering Society and Ningbo Municipal People's Government, will be held on November 22 to 24 in Ningbo, China. The CMW mainly focus on the new materials and industrialization.
The CMW includes main presentations and sub-meeting presentations. Many academicians and experts will join the main presentations and make the presentations on developments of science and technology related to Ningbo' s predominant and potential industries.The presentations could also focus on the research status of their nations or research institutions as well as the individual research fruits. There will be sub-meeting presentations brought by outstanding domestic middle-aged and young scientists and overseas Chinese scientists. Their topics will related with communication materials, new energy materials, chemistry engineering and polymer materials and advanced materials preparation, shaping and handling. We will also hold the communication and trade talk between enterprises and research institutions during the Material Week.
Please do not hesitate to contact us if you are interested in this event, and we also collect excellent papers in material field.
For details, please contact:
Mrs. Tian Yuan
Tel: +86 10 68594819
Fax: +86 10 68533613
(2)TEST INVESTIGATION ON HYDRAULIC LOSSES IN DISCHARGE PASSAGE OF AXIAL-FLOW PUMP
QIU Baoyun HUANG Jiyan Yangzhou University,
YUAN Shouqi Jiangsu University,
Under the influence of guide blade discharge circulation, discharge bend pipe secondary flow, the flow in the 1-channel discharge passage of an axial flow pump is complicated spiral flow, the discharge in the left channel is bigger than that in the right one as for 2-channel passage, and the passage hydraulic losses are abnormal. The section current energy of the passage is measured and determined with 5-hole probes accurately. The hydraulic loss characteristics are determined and analyzed. The methods deducing the hydraulic losses are investigated. The results indicate that the passage hydraulic losses are not proportional to the flow discharge. Compared with circle pipe, the hydraulic losses of divergent discharge passage are smaller and the pump assembly efficiency is higher with 10%-30%. As for 1-channel passage , axial-flow pump outlet circulation is too big usually, the passage hydraulic losses are big too, but small circulation can slightly reduce hydraulic losses. As for 2-channel passage, discharges in 2 channels are not equal and the hydraulic losses increase. The outlet guide blade with small discharge circulation or without circulation could reduce discharge passage hydraulic losses and pump assembly efficiency increases with 6%-11%.
(3)NEW METHOD ON PARAMETRIC DESIGN OF ADDENDUM BINDER SURFACE AND DRAWING PROCESS COMPLEMENTARY FOR AUTOMOTIVE PANEL RAWING DIE
CHEN Tao LI Guangyao Hunan University
A new method of addendum and binder surface design is proposed. Using this method, the design of addendum surface and binder surface is completed in CAE preprocessor instead of in CAD systems as ordinary methods do. It improves the efficiency of the tool design. After the design is completed, it can automatically produce a clean and connected mesh. This method provides convenient way to model true drawbead and improve the simulation's precision. Many applications have proved this method is suitable for automotive engineering.
(4) DEVELOPMENT OF PERSONALIZED MATERIALS FROM HUMAN HAIR PROTEINS
Shunichi KOBAYASHI, Shinshu University
Toshihiro FUJII, Shinshu University
Human hair is valuable source of biocompatible materials, because it is individually collected in large quantities. A rapid and convenient protein extraction method was developed for quantifying human hair components and called the "Shindai method". The novel three kinds of methods (Pre-cast, Post-cast, and soft post-cast methods) were also developed to form human hair protein films. Human hair protein particles were prepared from the wet protein films by the mechanical stimuli. Significant degradation of the protein was not found after the mechanical stimuli. Furthermore,
any significant degradation was not found in the samples stored for 8 months, indicating that the protein particle is excellent in respect of stability. Thus, human hair protein films and particles could be the personal self-reusable materials for various products.
(5) WIDE AREA OF APPLICATIONS USING MICROBUBBLES
Shu TAKAGI, The University of Tokyo
Microbubbles are now expected for the wide area of applications. One of the important applications is water treatment. Since microbubbles have large specific surface area and long residential time in the water, they have an advantage on the mass transfer through the surface or adsorption on it. This characteristic can be effectively used to purify the water. Therefore, there is a large demand to have an efficient microbubble generator developed for the water treatment. Here in this article, we present the technique to generate microbubbles using venture tube. Microbubbles are also used in the medical field. Microbubbles less than 5 microns have been already used as a contrast agent of blood vessels under ultrasound irradiation. These microbubbles are also used to cauterize cancer cells by focusing the ultrasound. These medical application techniques are also presented.
(6)JSME THE EXECUTIVE BOARD MEMBERS (2006)
President: Nobuhide KASAGI (The University of Tokyo)
President-elect: Shinobu SAITO (Ishikawajima-Harima Heavy Industries Co., Ltd.)
Vice Presidents: Masashi KATSUKI (Emeritus Professor Osaka University)
Masaki SHIRATORI (Yokohama National University)
Masato TANAKA (The National Institution for Academic Degrees and University Evaluation)
Executive Board directors
General Affairs: Koji KIMURA (Tokyo Institute of Technology)
Masaaki SATO (Tohoku University)
Hideshi FUKUMOTO (Hitachi, Ltd.)
Shin MORISHITA (Yokohama National University)
Budget and Finance: Katsuyuki OSAWA (Toyota Central R&D Labs.,Inc.)
Yoshinari OKI (Sankyo Tateyama Aluminium,Inc.)
Tsutomu HAENO (Nippon Steel Corporation)
Publishing: Hideo INABA (Okayama University)
Hiroyuki KAWADA (Waseda University)
Itaru TAKAYANAGI (ISUZU Technical Center Co., Ltd.)
Masaomi TSUTSUMI (Tokyo University of Agriculture and Technology)
Shigeo FUJIKAWA (Hokkaido University)
Toshio KODAMA (Mitsubishi Heavy Industries, Ltd.)
Kazuo SATO (Nagoya University)
Kenzo NONAMI (Kyushu University)
Toshiaki MURAKAMI (Toshiba Corporation)
Takahiro KONDO (Kyushu University)
Koichi HISHIDA (Keio University)
Masayuki SUZUKI (The Japan Society of Mechanical Engineers)
Masaki KITAGAWA (National Institute for Materials Science)
Seiji CHONAN (Akita Prefectural University)
(7) ANALYSIS OF A PLATE-TYPE PIEZOELECTRIC COMPOSITE UNIMORPH ACTUATOR CONSIDERING THERMAL RESIDUAL DEFORMATION
Sung-Choong Woo and Nam Seo Goo
The actuating performance of plate-type unimorph piezoelectric composite actuators having various stacking sequences was evaluated by three dimensional finite element analysis on the basis of thermal analogy model. Thermal residual stress distribution at each layer in an asymmetrically laminated plate with PZT ceramic layer and thermally induced dome height were predicted using classical laminated plate theory. Thermal analogy model was applied to a bimorph cantilever beam and LIPCA-C2 actuator in order to confirm its validity. Finite element analysis considering thermal residual deformation showed that the bending behavior of piezoelectric composite actuator subjected to electric loads was significantly different according to the stacking sequence, thickness of constituent PZT ceramic and boundary conditions. In particular, the increase of thickness of PZT ceramic led to the increase of the bending stiffness of piezoelectric composite actuator but it did not always lead to the decrease of actuation distance according to the stacking sequences of piezoelectric composite actuator. Therefore, it is noted that the actuating performance of unimorph piezoelectric composite actuator is rather affected by bending stiffness than actuation distance.
(8) THE PREDICTION OF ETCHING CHARACTERISTICS USING SPRAY CHARACTERISTICS IN ETCHING PROCESS OF LEAD-FRAME
Heungcheol Jeong, Gyungmin Choi and Duckjool Kim
Pusan National University
The objective of this study is to predict the etching characteristics using spray characteristics for the optimization on the etching process of Lead-Frame. The etching characteristics such as etching factor, uniformity were investigated on the actual operating conditions. The correlation between the etching characteristics and the spray ones obtained by measurement were analyzed to simulate the etching characteristics according to actual conditions of lead-frame etching process. These conditions of lead-frame process were spray pressure, distance from nozzle tip to substrate, pipe pitch, and nozzle pitch. To improve the etching characteristics in the lead-frame process, effects of the various operating conditions should be understood in detail. The spray characteristics obtained by experiment using PDA system were simulated by the Monte-Carlo method. The etching process model was coded by Java language. It was found that simulation results generally agreed well with the measured results of etching characteristics in lead-frame etching process. The optimal operating parameters were successfully found under variable conditions.
(9) UBIQUITOUS-BASED MOBILE CONTROL AND MONITORING OF CNC MACHINES FOR DEVELOPMENT IF U-MACHINE
Dong-Hoon Kim and Jun-Yeob Song
Korea Institute of Machinery and Materials(KIMM)
This study was an attempt to control and monitor Computerized Numerical Controller (CNC) machines anywhere and anytime for the development of a ubiquitous machine (u-machine). With a Personal Digital Assistant (PDA) phone, the machine status and machining data of CNC machines can be monitored in wired and wireless environments, including the environments of IMT2000 and Wireless LAN. Moreover, CNC machines can be controlled anywhere and anytime. The concept of the anywhere-anytime controlling and monitoring of a manufacturing system was implemented in this study for the purpose of u-manufacturing and u-machines. In this concept, the communication between the CNC controller and the PDA phone was successfully performed anywhere and anytime for the real-time monitoring and control of CNC machines. In addition, the interface between the CNC controller and the developed application module was implemented by Object linking and embedding for Process Control (OPC) and shared CNC memory. For communication, the design of a server contents module within the target CNC was based on a TCP/IP. Furthermore, the client contents module within the PDA phone was designed with the aid of embedded c++ programming for mobile communication. For the interface, the monitoring data, such as the machine status, the machine running state, the name of the Numerical Control (NC) program, the alarm and the position of the stage axes, were acquired in real time from real machines with the aid of the OPC method and by sharing the CNC memory. The control data, such as the start, hold, emergency stop, reserved start and reserved stop, were also applied to the CNC domain of the real machine. CNC machines can therefore be controlled and monitored in real time, anywhere and anytime. Moreover, prompt notification from CNC machines to mobile phones, including cellular phones and PDA phones, can be automatically realized in emergencies.
Editor : Tian Ruizhu
The Dept. of Internationa Affairs
Chinese Mechanical Engineering Society
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