scholarly journals Applying of Pressing Technology to Forming Finger-Joint Profile for Wood Splicing

2021 ◽  
Vol 346 ◽  
pp. 01033
Author(s):  
Olga Rubleva
Keyword(s):  
High Energy ◽  
Milling Process ◽  
Finger Joint ◽  
End Joining ◽  
Regulatory Requirements ◽  
Milling Tool ◽  
Series Of Experiments ◽  
The Cost ◽  
High Energy Consumption ◽  
Pressing Technology

Splicing of wood lengthwise is widely used in the manufacture of various products. The basic method of forming the finger joint profile is milling. This method has a number of disadvantages: high cost of the milling tool, necessity of its periodic sharpening; high energy consumption of the milling process, design constraints on the geometric parameters and strength of fingers (tenons). An alternative to milling is a new way of forming such joints elements as mortise and tenons by pressing along the grain. This method allows obtaining mortises in the form of fairly accurate rectangular imprints on the ends of the blanks. The use of a punching tool instead of a cutting one avoids chips and reduces the cost of the aspiration system. Previously, rectangular tenons were used only for L-type box joints. The aim of the study is to prove the possibility of using the cold end pressing technology to form the mortises and tenons profile for end joining that meet regulatory requirements. A series of experiments on pressing the elements of joints profile in the form of multiple tenons has shown that the achieved accuracy and roughness meet the requirements for the manufacture of joints intended for lengthwise splicing. Assessment of the strength of the joints showed their compliance with the regulatory requirements. The conducted research confirms confirms the possibility of using the pressing technology to form the profile of the finger joint for wood splicing.

Research on Tool Wear Form in Micro Turn-Milling Process

2012 ◽  
Vol 184-185 ◽  
pp. 663-667 ◽  
Author(s):  
Lin Hui Zhao ◽  
Jian Cheng Zhang ◽  
Wei Su
Keyword(s):  
Tool Wear ◽  
Small Diameter ◽  
Milling Process ◽  
Milling Tool ◽  
Key Factor ◽  
Part Surface ◽  
End Mills ◽  
Series Of Experiments ◽  
Turn Milling ◽  
Wear Condition

In micro machining, turn-milling tool wear is a key factor for part surface quality. This paper carries on experiments on end mills wear in micro turn-milling machining, aiming to research the wear form and provide some reference data for developing wear standard of small diameter end mills. To measure wear condition of end mills, machine vision technique is utilized. This paper designs and sets up an online end mill wear measurement system for a micro turn-milling process center. With a series of experiments on small diameter end mills, wear conditions of different cutting positions are researched. Based on analysis of experiment data, wear characteristics and wear rule for micro turn-milling process are summarized in this paper.

scholarly journals Process Intensification and its Applications - A Critical Review

2020 ◽  
Vol 13 (4) ◽  
pp. 402-412
Author(s):  
Sarthak Vaidya ◽  
Haribalakrishnammal Vaidyanathan ◽  
Sonali R Dhokpande
Keyword(s):  
Energy Consumption ◽  
Residence Time ◽  
Industrial Waste ◽  
Process Intensification ◽  
High Energy ◽  
Alternative Pathways ◽  
New Process ◽  
Micro Reactors ◽  
The Cost ◽  
High Energy Consumption

The problems faced by the various industries are high energy consumption which further increases the cost of production followed by reduced productivity and conversion, longer residence time, and pollution caused by industrial waste. Many researchers have found various alternative pathways to overcome these drawbacks. The same products were obtained in a better way by process intensification. Any process can be intensified either by introducing entirely a new process or by combing two or more conventional methods to form a new hybrid process e.greactive distillation, micro-reactors, etc. Due to an increase in population and less availability of land, reducing the chemical plant footprints is highly appreciable which is possible by process intensification. In this paper, we have reviewed the majority of the processes that have been intensified into a new process such as bioprocesses, extraction, distillation, leaching, Biofuels production, Desalination, etc.

Mechanochemical Nitride Synthesis

2007 ◽  
Vol 554 ◽  
pp. 51-57 ◽  
Author(s):  
Derek P. Thompson
Keyword(s):  
High Temperatures ◽  
Mechanochemical Synthesis ◽  
Room Temperature ◽  
High Energy ◽  
Milling Process ◽  
High Price ◽  
Diamond Machining ◽  
Structural Applications ◽  
The Cost ◽  
Frequent Criticism

A frequent criticism of nitride materials during the last 30 years, and especially those designed for structural applications has been that the cost is too high by a factor of (say) 10. In the competition with cheaper materials (albeit with poorer properties and shorter lifetimes), users have generally preferred to go for the cheaper option, rather than the more expensive nitrides. Despite many attempts to address this issue, the cost of nitride processing has remained high – due to the high price of starting materials, the high temperatures needed for firing, and also the finishing costs (often involving diamond machining), and this has been a major factor limiting the market share enjoyed by these materials. A number of studies have been reported recently using the technique of mechanochemical synthesis, in which nitrogen is incorporated (usually via ammonia) into the starting powders during a high-energy milling process (at room temperature). In the subsequent firing, considerably lower temperatures are needed to produce the resulting final nitride product(s). In this presentation, the technique of mechanochemical synthesis is discussed, the range of materials that have been produced are reviewed, and the potential of this technique for reducing the cost of bulk nitride production is reviewed.

scholarly journals Green Buildings - A Solution to India’s High Energy Consumption

2021 ◽  
pp. 37-48
Author(s):  
Deeptha .
Keyword(s):  
Heat Insulation ◽  
Green Buildings ◽  
High Energy ◽  
Embodied Energy ◽  
Construction Techniques ◽  
New Ideas ◽  
New Construction ◽  
Architectural Principles ◽  
The Cost ◽  
High Energy Consumption

This paper is to bring into knowledge, a proficiency, which would help us to fight against energy crises using new construction techniques. It discusses the needs and benefits of sustainable Green buildings. It focuses on coming up with new ideas to build green buildings with minimum Embodied Energy. High energy conservation in buildings can be achieved by insulating materials (powerful device for designing and building) and by improving the construction envelope heat safety, which then controls the building envelope's transmissivity. Since the orientation of buildings and their protection from the sun cannot be implemented freely in the urban environment where it is densely built, heat insulation and adoption of bioclimatic architectural principles becomes the need. Green buildings, at the decreased ranges of consumption of resource and energy, the design of green buildings will meet the needs of users. This is a wise approach to use India’s energy in this period of crisis. These buildings will replace most of our present building methodologies. “Energy can neither be created nor destroyed”, hence application of this paper is aimed at utilizing the irrelevant energy consumed in building processes and providing comfort at the cost of sustainability.

Development of the energy management system of an industrial enterprise (on the example of company «Sebryakovcement»)

2021 ◽  
pp. 94-104
Author(s):  
Т.А. Забазнова ◽  
Т.В. Секачева ◽  
С.Е. Карпушова
Keyword(s):  
Energy Management ◽  
Management System ◽  
High Energy ◽  
Industrial Enterprise ◽  
Energy Management System ◽  
Industrial Enterprises ◽  
Cost Of Production ◽  
The Cost ◽  
The Competitiveness Of Enterprises ◽  
High Energy Consumption

В нашей стране затраты на топливо и энергию составляют от 10 до 40% себестоимости продукции. Такой высокий уровень энергоемкости увеличивает затраты предприятия, связанные с производством продукции, и, как результат, снижает его конкурентоспособность. Поэтому реализация энергосберегающих программ на промышленных предприятиях становится первоочередной задачей. Стратегическое управление энергоэффективностью позволит поэтапно оптимизировать работу и значительно сократить расходы предприятия. В статье проведены анализ и оценка активности промышленного предприятия АО «Себряковцемент» с учетом оценки энергоемкости его деятельности. Для развития существующей системы управления энергозатратами промышленного предприятия предложена модель на основе стандарта ИСО. In our country, the cost of fuel and energy is from 10 to 40% of the cost of production. High energy consumption of products should be recognized as the main problem, due to the fact that it has an impact on increasing the cost of production and, as a result, on reducing the competitiveness of enterprises. Therefore, the implementation of energy-saving programs at industrial enterprises becomes a priority. Strategic management of energy efficiency will allow you to gradually optimize the work and significantly reduce the costs of the enterprise. The article analyzes and evaluates the activity of the industrial enterprise of company «Sebryakovcement», taking into account the assessment of the energy intensity of its activities. In the development of the existing energy management system of an industrial enterprise, a model based on the ISO standard is proposed.

Janus – A New Approach to Air Combat Pilot Training

2019 ◽  
Vol 2019 (4) ◽  
pp. 7-22
Author(s):  
Georges Bridel ◽  
Zdobyslaw Goraj ◽  
Lukasz Kiszkowiak ◽  
Jean-Georges Brévot ◽  
Jean-Pierre Devaux ◽  
...  
Keyword(s):  
Low Cost ◽  
Cost Effective ◽  
High Energy ◽  
Training System ◽  
Embedded Sensors ◽  
Pilot Training ◽  
New Approach ◽  
Combat Aircraft ◽  
Air Combat ◽  
The Cost

Abstract Advanced jet training still relies on old concepts and solutions that are no longer efficient when considering the current and forthcoming changes in air combat. The cost of those old solutions to develop and maintain combat pilot skills are important, adding even more constraints to the training limitations. The requirement of having a trainer aircraft able to perform also light combat aircraft operational mission is adding unnecessary complexity and cost without any real operational advantages to air combat mission training. Thanks to emerging technologies, the JANUS project will study the feasibility of a brand-new concept of agile manoeuvrable training aircraft and an integrated training system, able to provide a live, virtual and constructive environment. The JANUS concept is based on a lightweight, low-cost, high energy aircraft associated to a ground based Integrated Training System providing simulated and emulated signals, simulated and real opponents, combined with real-time feedback on pilot’s physiological characteristics: traditionally embedded sensors are replaced with emulated signals, simulated opponents are proposed to the pilot, enabling out of sight engagement. JANUS is also providing new cost effective and more realistic solutions for “Red air aircraft” missions, organised in so-called “Aggressor Squadrons”.

scholarly journals Coir Fibers Treated with Henna as a Potential Reinforcing Filler in the Synthesis of Polyurethane Composites

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1128
Author(s):  
Sylwia Członka ◽  
Anna Strąkowska ◽  
Agnė Kairytė
Keyword(s):  
Mechanical Properties ◽  
High Energy ◽  
Dynamic Mechanical Properties ◽  
Milling Process ◽  
Coir Fiber ◽  
Lawsonia Inermis ◽  
Coir Fibers ◽  
Mechanical Performances ◽  
The Impact ◽  
Reinforcing Filler

In this study, coir fibers were successfully modified with henna (derived from the Lawsonia inermis plant) using a high-energy ball-milling process. In the next step, such developed filler was used as a reinforcing filler in the production of rigid polyurethane (PUR) foams. The impact of 1, 2, and 5 wt % of coir-fiber filler on structural and physico-mechanical properties was evaluated. Among all modified series of PUR composites, the greatest improvement in physico-mechanical performances was observed for PUR composites reinforced with 1 wt % of the coir-fiber filler. For example, on the addition of 1 wt % of coir-fiber filler, the compression strength was improved by 23%, while the flexural strength increased by 9%. Similar dependence was observed in the case of dynamic-mechanical properties—on the addition of 1 wt % of the filler, the value of glass transition temperature increased from 149 °C to 178 °C, while the value of storage modulus increased by ~80%. It was found that PUR composites reinforced with coir-fiber filler were characterized by better mechanical performances after the UV-aging.

scholarly journals Designing high energy density flow batteries by tuning active-material thermodynamics

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5432-5443
Author(s):  
Shyam K. Pahari ◽  
Tugba Ceren Gokoglan ◽  
Benjoe Rey B. Visayas ◽  
Jennifer Woehl ◽  
James A. Golen ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Density ◽  
Fossil Fuels ◽  
Active Material ◽  
High Energy ◽  
Theoretical Framework ◽  
High Energy Density ◽  
Density Flow ◽  
The Cost

With the cost of renewable energy near parity with fossil fuels, energy storage is paramount. We report a breakthrough on a bioinspired NRFB active-material, with greatly improved solubility, and place it in a predictive theoretical framework.

scholarly journals Optimization and Tuning of Passive Tuned Mass Damper Embedded in Milling Tool for Chatter Mitigation

2020 ◽  
Vol 5 (1) ◽  
pp. 2
Author(s):  
Wenshuo Ma ◽  
Jingjun Yu ◽  
Yiqing Yang ◽  
Yunfei Wang
Keyword(s):  
Tuned Mass Damper ◽  
Structural Features ◽  
Milling Process ◽  
Diameter Ratio ◽  
Depth Of Cut ◽  
Receptance Coupling ◽  
Milling Tool ◽  
Mass Damper ◽  
Large Length ◽  
Deep Depth

Milling tools with a large length–diameter ratio are widely applied in machining structural features with deep depth. However, their high dynamic flexibility gives rise to chatter vibrations, which results in poor surface finish, reduced productivity, and even tool damage. With a passive tuned mass damper (TMD) embedded inside the arbor, a large length–diameter ratio milling tool with chatter-resistance ability was developed. By modeling the milling tool as a continuous beam, the tool-tip frequency response function (FRF) of the milling tool with TMD was derived using receptance coupling substructure analysis (RCSA), and the gyroscopic effect of the rotating tool was incorporated. The TMD parameters were optimized numerically with the consideration of mounting position based on the maximum cutting stability criterion, followed by the simulation of the effectiveness of the optimized and detuned TMD. With the tool-tip FRF obtained, the chatter stability of the milling process was predicted. Tap tests showed that the TMD was able to increase the minimum real part of the FRF by 79.3%. The stability lobe diagram (SLD) was predicted, and the minimum critical depth of cut in milling operations was enhanced from 0.10 to 0.46 mm.

Oxygen Supply Method Using Gas-Permeable Film for Wastewater Treatment

1993 ◽  
Vol 28 (7) ◽  
pp. 243-250 ◽  
Author(s):  
Y. Suzuki ◽  
S. Miyahara ◽  
K. Takeishi
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Oxygen Transfer ◽  
Transfer Rate ◽  
Oxygen Supply ◽  
Oxygen Transfer Rate ◽  
High Energy ◽  
High Rate ◽  
N Removal ◽  
High Energy Consumption

Gas-permeable film can separate air and water, and at the same time, let oxygen diffuse from the air to the water through the film. An oxygen supply method using this film was investigated for the purpose of reducing energy consumption for wastewater treatment. The oxygen transfer rate was measured for the cases with or without biofilm, which proved the high rate of oxygen transfer in the case with nitrifying biofilm which performed nitrification. When the Gas-permeable film with nitrifying biofilm was applied to the treatment of wastewater, denitrifying biofilm formed on the nitrifying biofilm, and simultaneous nitrification and denitrification occurred, resulting in the high rate of organic matter and T-N removal (7 gTOC/m2/d and 4 gT-N/m2/d, respectively). However, periodic sloughing of the denitrifying biofilm was needed to keep the oxygen transfer rate high. Energy consumption of the process using the film in the form of tubes was estimated to be less than 40% of that of the activated sludge process.

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