scholarly journals ROLE OF SUSTAINABLE TECHNIQUES IN MANUFACTURING PROCESS: A REVIEW

Author(s):  
RAJEEV SHARMA ◽  
Binit Kumar Jha ◽  
Vipin Pahuja

Customary mineral based liquids are as a rule broadly utilized in cooling and greases in machining activities. Nonetheless, these cutting liquids are the suitable wellspring of numerous natural and organic issues. To kill the evil impacts related with cutting liquids, it is important to move towards practical machining methods. Such sustainable machining techniques utilize minimize the amount of cutting liquid, fluid nitrogen, vegetable oil or packed air as a cooling-oil medium. The liquids utilized in economical machining strategies are viewed as absolutely biodegradable and Eco-friendly. This paper is a careful survey of the relative multitude of current environmental friendly machining methods as of now rehearsed in the metal cutting cycle. It has been likewise discovered that these economical machining strategies more often than not give better outcomes as far as improved surface nature of the machined part, upgraded apparatus life, less cutting temperatures and slicing powers when contrasted with traditional wet machining techniques. The principle motivation behind this survey work is to recognize the diverse supportable strategies and empower the utilization of such procedures in metal machining, so that, the reducing interaction turns out to be more expense powerful and climate inviting.

1998 ◽  
Vol 2 ◽  
pp. 115-122
Author(s):  
Donatas Švitra ◽  
Jolanta Janutėnienė

In the practice of processing of metals by cutting it is necessary to overcome the vibration of the cutting tool, the processed detail and units of the machine tool. These vibrations in many cases are an obstacle to increase the productivity and quality of treatment of details on metal-cutting machine tools. Vibration at cutting of metals is a very diverse phenomenon due to both it’s nature and the form of oscillatory motion. The most general classification of vibrations at cutting is a division them into forced vibration and autovibrations. The most difficult to remove and poorly investigated are the autovibrations, i.e. vibrations arising at the absence of external periodic forces. The autovibrations, stipulated by the process of cutting on metalcutting machine are of two types: the low-frequency autovibrations and high-frequency autovibrations. When the low-frequency autovibration there appear, the cutting process ought to be terminated and the cause of the vibrations eliminated. Otherwise, there is a danger of a break of both machine and tool. In the case of high-frequency vibration the machine operates apparently quiently, but the processed surface feature small-sized roughness. The frequency of autovibrations can reach 5000 Hz and more.


Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4171
Author(s):  
Rabia Ikram ◽  
Badrul Mohamed Jan ◽  
Akhmal Sidek ◽  
George Kenanakis

An important aspect of hydrocarbon drilling is the usage of drilling fluids, which remove drill cuttings and stabilize the wellbore to provide better filtration. To stabilize these properties, several additives are used in drilling fluids that provide satisfactory rheological and filtration properties. However, commonly used additives are environmentally hazardous; when drilling fluids are disposed after drilling operations, they are discarded with the drill cuttings and additives into water sources and causes unwanted pollution. Therefore, these additives should be substituted with additives that are environmental friendly and provide superior performance. In this regard, biodegradable additives are required for future research. This review investigates the role of various bio-wastes as potential additives to be used in water-based drilling fluids. Furthermore, utilization of these waste-derived nanomaterials is summarized for rheology and lubricity tests. Finally, sufficient rheological and filtration examinations were carried out on water-based drilling fluids to evaluate the effect of wastes as additives on the performance of drilling fluids.


Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 580
Author(s):  
Francisco J. G. Silva

Though new manufacturing processes that revolutionize the landscape regarding the rapid manufacture of parts have recently emerged, the machining process remains alive and up-to-date in this context, always presenting itself as a manufacturing process with several variants and allowing for high dimensional accuracy and high levels of surface finish [...]


Author(s):  
Rajeev Sharma ◽  
Binit Kumar Jha ◽  
Vipin Pahuja ◽  
Sagar Sharma

2019 ◽  
Vol 56 (4) ◽  
pp. 857-864
Author(s):  
Jana Ghitman ◽  
Raluca L. Stan

The main goal of this research study was to understand the role of the vegetable oil in the obtaining process of nanoparticles by emulsion solvent evaporation method, respectively the effect of the vegetable oil upon the final characteristics of hybrid PLGA-pomegranate vegetable oil (PMG) nanoparticles. Colloids with mean diameter around 125.6 nm (PLGA-np) and 141.7 nm (PLGA-PMG-np) were obtained. It was noted that the addition of the vegetable oil has a key role in the primary emulsification process leading to hybrid colloids with improved the uniformity (PdI) and stability of hybrid nanoparticles.


Author(s):  
Lalginthang Khongsai ◽  
Mayanglambam ManiBabu

The unique way of timekeeping strategy, involving pengkul (a traditional bamboo trumpet) as a communication or signalling device within the Lom institution demonstrates the early Kuki people’s technological adaptability and cognitive development. Pengkul has been an important musical instrument of the early Kuki people since time immemorial. It plays a significant role in traditional Kuki society as a means of public communication and conveyor of time and event rather than a mere instrument of merriments. Firstly, the article focuses on the procurement of raw materials, manufacturing process, uses, maintenance, repairing, and discard pattern of the pengkul. Secondly, the article focuses on the role of pengkul as a communication or signalling device within the organization of the village workforce called “ Lompi.” Wherein, pengkul remains as a guiding element of the socioeconomic survival strategy adopted by the traditional Kukis. Thirdly, the article further analyzes the myths and traditional beliefs associated with pengkul to delineate the ideational aspect of pengkul within their concept of the supernatural realm.


2017 ◽  
Vol 2 (2) ◽  
pp. 127-142
Author(s):  
Johar Maknun

ABSTRAKSI: Nilai-nilai luhur budaya yang dimiliki kelompok masyarakat di Indonesia sudah merupakan milik bangsa sebagai potensi yang tak ternilai untuk pembangunan dan kemajuan bangsa. Di lingkungan masyarakat tradisional Jawa Barat terbangun sains asli yang berbentuk pesan, adat-istiadat yang diyakini oleh masyarakatnya, dan disampaikan secara turun-temurun tentang bagaimana harus bersikap terhadap alam. Masyarakat adat yang tidak mendapatkan pengetahuan formal tentang peran gas oksigen, karbondioksida, serta siklus karbon di alam, menerapkan pengetahuan tradisional berupa amanat leluhur untuk menjaga hutan dan air dengan cara tidak menebang hutan sembarangan. Teknologi yang berkembang pada masyarakat tradisional Sunda, salah satunya, bisa diamati pada bangunan tradisional berupa rumah panggung. Sistem kekuatan pada rumah panggung menggunakan ikatan, sambungan “pupurus”, dan pasak. Tidak ada paku, mur, dan baut, karena dilarang oleh adat dan bertentangan dengan aturan leluhur mereka atau tabu. Nilai-nilai luhur dan budaya lokal tersebut tetap dipertahankan dan diwariskan kepada generasi berikutnya yang hidup di era modern. KATA KUNCI: Sains Modern dan Tradisional; Teknologi Ramah Lingkungan; Kearifan Lokal; Masyarakat Sunda; Rumah Panggung. ABSTRACT: “The Concept of Science and Technology in Traditional Communities in West Java Province, Indonesia”. The noble values of culture owned by community groups in Indonesia have belonged to the nation as an invaluable potential for the development and progress of the nation. In the West Java traditional community, the original science in the form of messages, customs that are believed by the community, and passed down from generation to generation about how to behave towards nature. Indigenous peoples who do not get formal knowledge of the role of oxygen gas, carbon dioxide, and the carbon cycle in nature, applying traditional knowledge of ancestral mandates to preserve forests and water by not cutting down forests indiscriminately. The technology that developed in Sundanese traditional society, one of them, can be observed in the traditional building in the form of a stage house. The power system of the house on stilts uses ties, connections, and pegs. There were no nails, nuts, and bolts, for it was forbidden by custom and against their ancestral rules or taboos. These valuable values and local cultures are maintained and passed on to the next generation living in the modern era.KEY WORD: Modern and Traditional Science; Environmental Friendly Technology; Local Wisdom; Sundanese People; Stage House.About the Author: Dr. Johar Maknun adalah Dosen Senior pada Program Studi Pendidikan Teknik Arsitektur FPTK UPI (Fakultas Pendidikan Teknologi dan Kejuruan, Universitas Pendidikan Indonesia), Jalan Dr. Setiabudhi No.229 Bandung 40154, Jawa Barat, Indonesia. Alamat emel: [email protected] to cite this article? Maknun, Johar. (2017). “Konsep Sains dan Teknologi pada Masyarakat Tradisional di Provinsi Jawa Barat, Indonesia” in MIMBAR PENDIDIKAN: Jurnal Indonesia untuk Kajian Pendidikan, Vol.2(2), September, pp.127-142. Bandung, Indonesia: UPI [Indonesia University of Education] Press, ISSN 2527-3868 (print) and 2503-457X (online). Chronicle of the article: Accepted (January 25, 2017); Revised (April 30, 2017); and Published (September 30, 2017).


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