Consideration of Rotation Direction Vibration of Natural Fiber Gears Made from Only Bamboo Fibers Extracted with a Machining Center

2018 ◽  
Vol 2018.12 (0) ◽  
pp. D01
Author(s):  
Takayuki Yanagawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Shota Matsui ◽  
Keiji Ogawa ◽  
...  
Keyword(s):  
Natural Fiber ◽  
Rotation Direction ◽  
Machining Center ◽  
Bamboo Fibers

scholarly journals Driving Performance of Natural Fiber Gears Made Only from Bamboo Fibers Extracted with a Machining Center

2020 ◽  
Vol 14 (2) ◽  
pp. 280-293
Author(s):  
Tetsuya Kawabata ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Hiromichi Nobe ◽  
◽  
...  
Keyword(s):  
Bending Strength ◽  
Natural Fiber ◽  
Spur Gear ◽  
Hot Press ◽  
Machining Center ◽  
Machine Element ◽  
Press Method ◽  
Bamboo Fibers ◽  
Plastic Gears ◽  
Press Molding

Plastic gears are light and can be used without any lubricant, but they have low strength and an adverse effect on the environment. Therefore, a new gear that maintains these advantages while mitigating the disadvantages has been proposed. The development of sustainable and reproducible natural materials is desired to address these environmental problems. Therefore, in this study, a method was devised to extract high-quality and precise bamboo fibers using a machining center. Then, the hot press method was used to produce a novel spur gear made from only bamboo fibers, which is a green and organic machine element with a complicated shape. The present paper describes the characteristics of the proposed bamboo fiber gears, considering experimental results, including the hot press molding conditions, and the influence of fiber length on tooth bending strength, root strain, and vibration due to meshing teeth.

Basic Performance of Natural Fiber Bevel Gears Made From Only Bamboo Fibers Extracted With a Machining Center

2020 ◽  
Author(s):  
Tetsuya Kawabata ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Masao Nakagawa ◽  
Hiromichi Nobe
Keyword(s):  
Natural Fiber ◽  
Pressing Method ◽  
Bevel Gears ◽  
Machining Center ◽  
Module Size ◽  
New Type ◽  
Bamboo Fibers ◽  
Mechanical Elements ◽  
Plastic Gears ◽  
Black Color

Abstract Metal gears can transmit large torque. The disadvantages associated with metal gears are the noise produced and necessity of lubricants. Plastic gears are advantageous because they are lightweight and can be used without lubricants. However, plastic gears have relatively low strengths and damaging environmental effects. We propose the development of a new type of gear that overcomes the disadvantages associated with metal and plastic gears whilst maintaining their advantages. To address environmental issues within manufacturing, it is particularly important to utilize sustainable and reproducible natural materials. Therefore, we devised a method for extracting high-quality and high-precision bamboo fibers using a machining center. Bamboo bevel gears, which are complex-shaped mechanical elements, were manufactured using the hot-pressing method. This paper outlines the performance and characteristics of the molded bamboo bevel gears. We investigated the degree of burning and strength of the bamboo fiber gears at various cutting and forming conditions. The results demonstrated that the degree of burning (black color) did not affect the gear strength, and the gear strength was at a maximum when the fiber length was 50% of the module size.

Driving Performance of Natural Fiber Gears Made From Only Bamboo Fibers Extracted With a Machining Center

2018 ◽  
Author(s):  
Takayuki Yanagawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Syota Matsui ◽  
Hiromichi Nobe
Keyword(s):  
Natural Fiber ◽  
Spur Gear ◽  
Tooth Root ◽  
Hot Press ◽  
Acceleration Measurement ◽  
Machining Center ◽  
Machine Element ◽  
Press Method ◽  
Bamboo Fibers ◽  
The Relationship

The advantages of a plastic gear are that it is light and can be used without any lubricant, and its disadvantages are that its strength is low and it has large environmental impact. Therefore, the development of a new gear that maintains the advantages while negating the disadvantages has been proposed. The development of sustainable and reproducible natural materials is particularly desired to address environmental problems. Therefore, in this study, a method was devised to extract high quality and highly precise bamboo fibers using a machining center. Then, the hot press method was used to produce a spur gear, which is a machine element with a complicated shape. The present paper describes the characteristics of the bamboo fiber gears investigated through experiments. The results of tooth root strain measurement showed the relationship between rotation speed and tooth root strain. In addition, we calculated the theoretical value of tooth root strain and compared it with the experimental value. The experimental value was lower than the calculated value. The results of acceleration measurement showed that that tooth root strain is associated with acceleration.

Basic Performance of Natural Fiber Bevel Gears Made From Only Bamboo Fibers Extracted With a Machining Center

2021 ◽  
Author(s):  
Kawabata Tetsuya ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Nakagawa Masao ◽  
Hiromichi Nobe
Keyword(s):  
Natural Fiber ◽  
Bevel Gears ◽  
Machining Center ◽  
Basic Performance ◽  
Bamboo Fibers

scholarly journals Basic study on molding and characteristics of pure natural fiber spur gears made from bamboo fibers extracted with a machining center

2014 ◽  
Vol 80 (818) ◽  
pp. DSM0309-DSM0309
Author(s):  
Toshiki HIROGAKI ◽  
Eiichi AOYAMA ◽  
Keiji OGAWA ◽  
Showgo NISHIDA ◽  
Akihiro OISHI ◽  
...  
Keyword(s):  
Natural Fiber ◽  
Spur Gears ◽  
Basic Study ◽  
Machining Center ◽  
Bamboo Fibers

Fabrication of Binder-Free Green Composite Using Bamboo Fibers Extracted with a Machining Center

2010 ◽  
Vol 447-448 ◽  
pp. 760-764 ◽  
Author(s):  
Keiji Ogawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Mitsuaki Taniguchi ◽  
Sachiko Ogawa
Keyword(s):  
Present Report ◽  
Bamboo Fiber ◽  
Hot Press ◽  
Green Composite ◽  
Forming Process ◽  
Machining Center ◽  
Press Forming ◽  
Hot Press Forming ◽  
Binder Free ◽  
Bamboo Fibers

Bamboo grows faster than other renewable natural materials. Bamboo fiber, in particular, has attracted attention as an environmentally superior material. Therefore, we proposed a sustainable manufacturing system using bamboo. An extraction method of bamboo fibers end-milled using a machining center with in-situ measurement is proposed. Bamboo fibers with high precision shape are efficiently acquired. In the present report, we propose the fabrication of binder-free composite by a hot press forming method that only uses bamboo fibers extracted by a machining center. We experimentally demonstrated various hot press forming conditions and achieved proper forming conditions to optimize the forming process. We also made various three-dimensional shapes considering the practical applications of the formed binder-free bamboo fiber moldings.

scholarly journals STUDI PERBANDINGAN SIFAT MEKANIK SERAT BAMBU

2021 ◽  
Vol 5 (2) ◽  
pp. 383
Author(s):  
Gregoria Illya ◽  
Ika Bali
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Performance ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Extraction Methods ◽  
Daily Routine ◽  
Compressive Loads ◽  
Bamboo Fibers ◽  
High Flexibility

Natural fibers have application in almost every item used in our daily routine and been contributing explicitly to the economic prosperity and sustainability in our lives. Among the natural fiber plants, bamboo is the most popular, because of its versatile applications and significant contribution to the environment. Bamboo fibers have been used in various application such as decoration, weaving, paper makin, textile, and high-performance composites for the past many years. They have several advantages such as superior tensile strength, low density, and high flexibility under flexible and compressive loads. In order to meet the requirements of each bamboo application, there is a need to study the mechanical properties of bamboo fibers. This study reviews mechanical properties of bamboo fibers for various species, extraction methods, plant age, sizes, and moisture contents.  Keywords: bamboo fiber; bamboo extraction method; mechanical properties; mechanical testing; tensile strength AbstrakIndonesia kaya akan tanaman yang dapat diambil seratnya untuk diolah menjadi produk yang bermanfaat. Di antara tanaman penghasil serat alami, bambu adalah yang paling populer, karena memiliki aplikasi yang serba guna, mudah tumbuh, tidak memerlukan perawatan dan dapat mengurangi pencemaran udara. Serat bambu telah digunakan dalam berbagai aplikasi seperti dekorasi, perabot, tekstil, kertas dan komposit. Beberapa keunggulan serat bambu adalah memiliki kekuatan tarik yang besar, densitas yang rendah dan fleksibilitas yang tinggi. Dalam rangka memenuhi persyaratan masing-masing aplikasi dari serat bambu, diperlukan studi mengenai sifat mekanik serat bambu. Penelitian ini membandingkan beberapa penelitian yang sudah dilakukan mengenai sifat mekanik serat bambu berdasarkan spesies, metode pengolahan dari batang bambu menjadi serat, umur tanaman, ukuran serat dan kadar kelembaban. Serat bambu yang dihasilkan dapat memiliki sifat mekanik yang optimal jika bambu yang dipilih adalah dari spesies tertentu, memiliki kadar kelembaban yang rendah dan menggunakan metode ekstraksi yang tepat.

scholarly journals Mechanical Performance and Moisture Absorption of Unidirectional Bamboo Fiber Polyester Composite

2018 ◽  
Vol 911 ◽  
pp. 88-94 ◽  
Author(s):  
Omid Nabinejad ◽  
Sujan Debnath ◽  
Jack Kai Beh ◽  
Mohammad Yeakub Ali
Keyword(s):  
Mechanical Properties ◽  
Moisture Absorption ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Bamboo Fiber ◽  
Synthetic Fiber ◽  
Moisture Uptake ◽  
Polyester Composite ◽  
Bamboo Fibers

Bamboo fibers as a natural fiber offer numerous advantages such as high specific strength over synthetic fiber when used as reinforcing fiber for polymer composites. Yet the hydrophilic nature of bamboo fibers with high moisture absorption results in incompatibility in between bamboo fibers and unsaturated polyester resin. An experimental study was carried out to investigate the effects of alkali treatment of bamboo fiber on the mechanical properties and water sorption properties of polyester composite. The result revealed that, the bamboo fiber polyester composite with 5% Alkali treated bamboo fiber possesses the highest mechanical properties. Besides, Alkali treated fibers composite showed a significant reduction in moisture uptake compared to untreated fibers, where composite with 7% Alkali treated showed the lowest moisture uptake.

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