Special Issue; Products for Industrial Machinery - NTN

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NTN TECHNICAL REVIEW No742006 Introduction of an Award-Winning Product 2005 Monozukuri Buhin Taisho Grand Prix Machine Component Award Monodrive Two-Way Feeder Toshio OGUSU The Monodrive Two-Way Feeder is a parts feeder where parts can be moved in two directions (the line supply side and the other side) by one driving unit. This reduces the driving unit and controller set from two pieces to only one piece. Therefore, the feeder becomes smaller and lighter, with reductions in power consumption, cost, and maintenance. 1. Introduction NTN’s Monodrive Two-Way Feeder is a unique compact vibratory parts feeder optimized for feeding many part types in smaller lots, and boasting greatly decreased floor space requirements compared with conventional bowl-type parts feeders. As many bulk parts and components are now manufactured in plants outside Japan, automatic assembly lines in Japan are increasingly required to be capable of producing more product types in smaller lot sizes, thereby demands are growing for less expensive, more compact parts feeding devices. So far, the conventional parts feeder systems used for this purpose have generally consisted of a cylindrical bowl feeder type that aligns the parts by vibration and a linear feeder type that feeds the parts to the assemblers. In this arrangement, the floor space required for the bowl feeder section is often great. Therefore, believing that a unique driving unit capable of the entire process of parts alignment and feeding would dramatically raise user satisfaction, the author began his commitment to the development and commercial release of the Monodrive Two-Way Feeder product. The design concept and novel operating principle of this product have been highly evaluated, and it even received the 2005 Monozukuri Buhin Taisho Machine Component Award sponsored by Nikkan Kogyo Shimbun, Ltd., a leading Japanese industrial paper. This award was given to outstanding machine components among those developed or brought to market in the 2005 business year. In this report, the author would like to introduce this unique product to the readers. 2. Overview of the Monodrive Two-Way Feeder Photo 1 shows the appearance of the author’s monodrive two-way feeder. In Table 1, the features of the author’s monodrive two-way feeder design are compared with those of conventional compact vibratory parts feeder systems. Various compact parts feeder designs that do not employ bowls have been available (Table 1). However, these products have drawbacks, including the need for two driving units and the difficulty of adjustment of the entire system. Requiring multiple assemblies, conventional parts feeder systems that use two linear feeders do not satisfy the needs for less expensive, compact parts feeding systems. Therefore, the author tried various ideas for parts feeding systems in which one linear feeder unit could feed the parts. As a result of these attempts, the author has incorporated a vibrationdirection switching leaf spring unit (Photo 2) into a conventional linear feeder. Thus, the author has Product Engineering Department Precision Equipment Division -104-
Monodrive Two-Way Feeder Flow direction of workpieces Alignment chute (aligns workpieces and supplies them to the next process) Driving unit (1 linear feeder) Return trough (stores workpieces and supplies them to the alignment chute) Photo 1 Monodrive Two-Way Feeder Controller: 1 unit Conventional designs Return feeder 1 Linear feeder x 2 Return feeder 2 Drum feeder Monodrive two-way feeder Table 1 Space-saving parts feeding method (vibration type) Type System Advantages Disadvantages 1 lower driving unit +2 chutes Rotary hopper + linear feeder Linear feeder + return chute Both feeders are controlled independently of the others 1 drive unit and 1 controller Storage of workpieces 1 drive unit and 1 controller Easy adjustment and maintenance Easy storage and input of workpieces 2 sets of drive units and controllers are necessary Difficulty of adjustment (for resonance point with 2 vibration systems) System-specific control is impossible Difficulty in supplying workpieces 2 sets of drive units and controllers are necessary System-specific control is impossible Vibration-direction switching leaf spring (forward-backward) Workpieces in return trough Workpieces in chute Linear-feeder leaf spring (forward-backward) Photo 2 Composition of leaf spring (Monodrive Two-Way Feeder) -105-
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88th Anniversary Special Issue; Pro
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NTN TECHNICAL REVIEW No.742006 Pref
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Trends in Recent Machine Tool Techn
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Development of a New Grease Lubrica
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