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1
Content available remote Developing High Quality Human Resources of High-Tech Agricultural Enterprises in Vietnam
Hien Le Thi
Annals of Computer Science and Information Systems
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2021
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Vol. 28
145--150
EN
Globalization and Industrial revolution 4.0 impact increased to the businesses in general and agricultural high-tech enterprises in particular. Businesses focus on applying high technology to improve efficiency in production, business activities and create a sustainable competitive advantage for businesses. Therefore, the human factor, especially the development of high-quality human resources for high-tech agricultural enterprises, should be concerned and play a decisive role. This paper focuses on analysing the current situation of developing high-quality human resources through Recruitment and Selection, Training and Development and Compensation of enterprises. The results show that the above activities still have many limitations, especially Recruitment, Selection and Compensation. From there, the author proposes some suggestions to improve the development of quality human resources of high-tech agricultural enterprises in Vietnam.
2
Content available Development of a high-speed mirror-like finish polishing technology for minute parts based on a linear motor
Tanabe Ikuo, De Sousa Gama Valerio, Ise Yoshifumi, Takahashi Satoshi, Isobe Hiromi
Journal of Machine Engineering
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2019
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Vol. 19, No. 1
71--85
EN
As high speed, high acceleration and stable drive on machine tools is constantly growing in demand, the use of linear motors in machine tools has increased. On the other hand, in order to achieve a high degree of quality, the need for mirror-like finish surfaces on industrial products has also considerably increased. This research explores the use of linear motors to develop a high-speed fine polishing process that achieves a mirror-like finish surface on small parts. The first stage of this process consisted in developing a polishing device, which was composed of a NC milling machine, a linear motor drive and a polishing head. Specifically, a polishing head attached to a linear motor drive was coupled with the spindle of a NC milling machine. A substitute for a small linear motor drive was obtained from a commercially available shaver, while the polishing head was made of propylene. The polishing head elaboration process, linear motor drive properties, lapping agent and the optimum polishing conditions were investigated in several experiments. The evaluation consisted in the high-speed polishing of minute areas on flat surfaces using the selected optimum conditions. It is concluded that, (1) the proposed system was able to achieve a mirror-like finish surface, (2) when compared to polishing with an ultrasonic motor, the machining time of the proposed system was reduced by half, (3) the proposed system was able to achieve a mirror-like finish on a 3 mm square sided area.
3
Content available Lapping system for improvement of geometrical accuracy using lathe machine
Soe Y. H., Tanabe I., Iyama T., Da Cruz J. R.
Journal of Machine Engineering
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2012
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Vol. 12, No. 1
28--40
EN
The geometrical accuracy of the products are essential for high quality and interchangeability. Lapping processing is mostly using for final improvement of geometrical accuracy. Geometrical accuracy includes cylindricity, circularity and straightness. In this paper, lapping processing using a normal lathe was investigated for improvement of geometrical accuracy. Firstly, normal turning process is taken and then, the lapping process is performed using the same lathe. The lapping tool consists of a lapping head made of polypropylene (PP), a coil spring for supplying lapping pressure and holder for fitting on tool post. Lapping slurry is composed by mixing water, PEO (Polyethylene Oxide) and diamond grain. This lapping slurry is supplied between the work piece and the lapping head during lapping processing. The lapping head is made to contact and leave from work piece in regular intervals for catching new grains and removing chips. The optimum lapping condition was investigated for high productivity and high accuracy by experiments. It is concluded from the results that; (1) The geometrical accuracy were improved by using developed lapping system with ordinary lathe machine. (2) The optimum lapping condition was revealed experimentally. (3) The surface roughness and dimensional accuracy are also improved using this developed lapping system.
4
Content available Lapping for mirror-like finish on cylindrical inner and end surfaces using the lathe with linear motor
Moe A. L., Tanabe I., Iyama T., Nasu F.
Journal of Machine Engineering
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2010
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Vol. 10, No. 1
13--25
EN
Lapping is an old traditional machining process that has been useful all along in the human history. Uniform surface finishing by manual hand lapping on cylindrical inner and end surfaces are very difficult. Additionally, the geometrical form accuracy and productivity are lower. In a previous study, the new lapping method for outer cylindrical surface using the lathe with linear motor has been reported. However, this method could not be applied directly for the cylindrical inner and end surfaces. Therefore, lapping for mirror-like finish on cylindrical inner and end surfaces using the lathe with linear motor is investigated. In this study, lapping tool was modified from previous study to be suited for the cylindrical inner and end surfaces. Then, lapping methods for inner and end surfaces were developed for uniform mirror-like finish. Surface roughness and geometrical form accuracy improvement were measured for both surfaces. The optimum conditions for high productivity and high quality mirror-like surfaces were investigated. It was concluded from the results that, the developed lapping system was able to process mirror-like surface on cylindrical inner and end surfaces. Moreover, the optimum conditions for the mirror-like surfaces were revealed experimentally.
5
Content available High speed lapping for mirror-like finish using the lathe with linear motor
Moe A. L., Tanabe I., Iyama T., Nasu F.
Journal of Machine Engineering
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2010
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Vol. 10, No. 1
26--38
EN
Several machines with linear motor have been developed for high productivity. The characteristics of these machines are high speed, high acceleration and deceleration with stable behaviors of feed. Moreover, mirror-like surface is required to add high quality on the most products. In this study high speed lapping by using the lathe with linear motor was investigated for mirror-like surface. Lapping was performed after turning with the same lathe Lapping tool consists of a lapping head, a spring and holder on the tool post to assemble the linear motor lathe. The spring is used to supply lapping pressure. Lapping slurry consists of water, PEO ( Polyethylene Oxide) and diamond grain. This slurry was supplied between a work piece and lapping head. Then, high speed lapping was performed. During the process, the lapping head temporarily left from work surface in order to catch some new grains and removed some chips. The optimum combination of both the spindle speed and the feed speed was investigated for high quality and productivity experimentally. Surface roughness and form accuracy were measured. It was concluded from the results that (1) Mirror-like surface was obtained by the high speed lapping, and (2) Optimun conditions for efficient high speed lapping was revealed experimentally.
6
Pomiar właściwości wstęgi w maszynie papierniczej. Cześć 7, Czujniki zawartości popiołu
Ginalski T.
Przegląd Papierniczy
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2000
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R. 56, nr 11
639--640
7
Pomiar właściwości wstęgi w maszynie papierniczej. Cz. 2, Czujniki gramatury
Ginalski T
Przegląd Papierniczy
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1998
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R. 54, nr 3
156--157
8
Pomiar właściwości wstęgi w maszynie papierniczej. Cz. 1, Układy trawersujące
Ginalski T
Przegląd Papierniczy
|
1998
|
R. 54, nr 2
89--90
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