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New approach towards the machining process after laser cladding

Shen Xuehui, Su Hao, Wang Jiatian, Zhang Changsheng, Xu Chonghai, Bai Xiaolan

Archives of Civil and Mechanical Engineering

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2021

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Vol. 21, no. 1

136--152

EN

As a chip-free and high-efficiency three-dimensional forming technology, laser cladding has been successfully applied in the green manufacturing and remanufacturing of some high-end engineering parts/components. However, in most cases, cladding coatings need to be machined due to the poor surface finishing by sole laser cladding technique. The study aims to explore an effective way to replace the current machining process after laser cladding, which is supposed to be incapable of satisfying the various technical requirements of some high-demand engineering parts/components. With this purpose, three new surface strengthening processes, i.e. ultrasonic roller burnishing at ambient temperature (URB), ultrasonic roller burnishing at warm temperature (UWB), and UWB coupled with continuous heat treatment (UWB/HT), were proposed and comparatively explored. The contact stresses between the contact pairs in URB were calculated and analyzed in theory. A set of ultrasonic roller burnishing equipment was self-manufactured to perform the experiment. Comparing with the conventional process, the three new processes were evaluated mainly from aspects of surface finishing, the adhesion behavior and corrosion resistance of the finished surface. Summarily, ultrasonic warm burnishing coupled with continuous heat treatment (UWB/HT) is considered to have the greatest potential to achieve the effective machining after laser cladding with excellent surface finishing over the other two strategies, which is expected to further advance the application of laser cladding technique particularly in the fabrication of some high-demand products serving in harsh conditions.

2

The product strength analysis of woven bag made from recycled mineral water plastic cups based on the polypropylene content

Sudjono Hary, Pratikto, Surachman, Sugiono Sugiono

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2020

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Vol. 29, No. 2

259--272

EN

The increasing amount of plastic wastes has become a threat to the sustainability of all ecosystem in this Earth. This paper aims to provide an alternative utilization of plastic wastes as the raw material in the manufacturing process of woven bag products with a quality control in its tenacity. The initial phase of this research is a literature review on the concept of green manufacturing, woven bag quality, compositions of plastic wastes and woven bag manufacturing proses. Furthermore, it is followed by a data measurement in a form of tenacity test using a thread test gauge (tenacity). There are two types of the condition in the manufacturing process of woven bag production compared by increasing the temperature as much as 10°C in all the extraction machines. The measurement result shows that the average tensile strength in the production process of the woven bag made from the wastes of mineral water plastic cups with 10% composition and extraction temperature for the first condition is 3.38 g per 1 denier and the second condition is 4.76 g per 1 denier. The result of second condition manufacturing (increasing the extraction temperature by 10°C) after comparing it with the quality required by Standard National Indonesia (SNI) as much as 4 to 6 g per 1 denier is considered good quality. Therefore, through the concept of green manufacturing, the utilization of plastic wastes might provide a substitution to the part of plastic core raw material in the woven bag production. This research is designed to be the beginning of innovation to acquire raw materials for the woven bag, furthermore, the optimization toward the machine setting and innovation on plastic wastes raw materials become the foundation in increasing the tenacity.

3

Podstawy projektowania i optymalizacji ekologicznych procesów obróbki skrawaniem

Grzesik W.

Mechanik

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2013

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R. 86, nr 3

153--154, 156, 158, 160, 162, 164

PL

Obecny stan obróbki skrawaniem na tle strategii zrównoważonego wytwarzania (ZW). Koncepcje w zakresie oszczędzania energii w obrabiarkach i procesach technologicznych obróbki. Uwzględnienie czynnika energochłonności i emisji CO2 w fazie projektowania i optymalizacji procesu obróbki. Możliwości doskonalenia i optymalizacji procesów technologicznych przez modelowanie numeryczne MES. Praktyczne rozwiązania i efekty uzyskane z tytułu dostosowania procesów technologicznych obróbki do wymagań zrównoważonego wytwarzania.

EN

Current state of machining technology in terms of sustainable manufacturing. Conceptions of the energy reduction in machine tools and machining processes including cutting and grinding operations. Consideration of the energy consumption and CO2 emission in the process design and optimization. Possibilities and practical effects resulting from numerical modeling of the machining process. Case studies and results obtained when using eco efficiency strategy.

4

Green manufacturing in machinery industry

Bashkite V., Moseichuk V., Karaulova T.

Journal of Machine Engineering

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2009

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Vol. 9, No. 4

94--106

EN

Green manufacturing cuts across every aspect of manufacturing including product development, process technologies, energy consumption and material flow. Becoming green can be viewed as a process where we start using more eco-friendly manufacturing resources that have low embedded energy and come from renewable resources. Green Manufacturing covers the whole life cycle of product, from requirements specification, design, manufacturing, and maintenance to final discarding. Green design is the most significant part of product's life cycle. Term "green" means that design should consider the product's impact on the environment and causes minimal pollution. This term includes such important approaches as design for the environment (DFE), design for disassembly (DFD), and design for recycling (DFR). Manufacturers can think about the end-of-life approaches across a wide range of products they use in production processes, for example, different machines, machine-tools, material handling equipment, cranes, etc. The analysis of current end-of-life practices identifies significant improvements to product design that reduce the impact of manufactured goods on the environment as whole. The scope of this paper is to describe possible product's end-of-life strategies on the basis of material handling equipment case study.