Improvement in the quality of the processed material surfaces lies in the moving of nozzle in the cavitation processing

2021 ◽  
pp. 101206
Author(s):  
Masataka Ijiri ◽  
Koji Yamaguchi ◽  
Shoichi Kikuchi ◽  
Masakazu Fujiwara ◽  
Yuki Nakanishi ◽  
...  
Keyword(s):  
Material Surfaces ◽  
Processed Material

Development of Extrusion and Rolling Textures during ECAP of Mg-Alloys

2008 ◽  
Vol 584-586 ◽  
pp. 748-753 ◽  
Author(s):  
Heinz Günter Brokmeier ◽  
Wei Min Gan ◽  
Ming Yi Zheng ◽  
Zuzana Zuberova ◽  
Yuri Estrin
Keyword(s):  
Crystallographic Texture ◽  
Thermomechanical Processing ◽  
Mg Alloys ◽  
Processed Material ◽  
General Rules ◽  
Number Of Passes

Crystallographic texture includes much information on a material’s behaviour that depends on the processed material itself, the particular thermomechanical processing it has undergone, and the quality of the process. ECAP processed pure Mg and Mg alloys were characterised by their texture and are discussed in terms of texture symmetry. For all types of deformation, including ECAP, the basal plain orientation has to follow certain general rules. Particularly for larger number of passes the ECAP texture can be explained in terms of standard rolling or extrusion textures.

scholarly journals Design and Performance Test of Rubber Grinding Machine

2019 ◽  
Vol 3 (2) ◽  
pp. 299-308
Author(s):  
Sri Aulia Novita ◽  
Hendra Hendra ◽  
Jamaluddin Jamaluddin ◽  
Muhammad Makky ◽  
Khandra Fahmi
Keyword(s):  
Performance Test ◽  
Average Rate ◽  
National Standard ◽  
Natural Coagulant ◽  
Processing Equipment ◽  
Liquid Smoke ◽  
Processed Material ◽  
And Performance ◽  
Grinding Machine

The quality of rubber processed materials, that is produced by the farmer is generally low and can be seen from their colour,  pollutants levels, foul odour and the very cheap price. To improve the quality of the rubber should be done both in terms of its treatment and processing equipment. The main objective of this research is to enhance and improve the quality of farmer's rubber processed materials by using natural coagulant which liquid smoke to agglomerate the rubber, and designing of rubber grinding machine. The component of rubber grinding machine including hopper, regulating entry materials, three rollers, pulleys and belt, outlet, gears, engine, regulating the thickness and chassis. In this research, the thickness rubber after grinding is 3-5 mm accordance with Indonesian National Standard rubber. Processed material rubber produced is white and no pollutants. The coagulant used was liquid smoke with a concentration of 10 -20%, where this addition affects the agglomeration speed of rubber and smelled slightly of smoke. The average rate of Feed is 48.58 kg / h, a capacity of the machine is 37.40 kg/hr and cost of operation is Rp. 650 / kg.

Modernization of the upper head of the bucket elevator

2015 ◽  
Vol 5 (1) ◽  
pp. 207-214
Author(s):  
Шатохин ◽  
Ivan Shatokhin ◽  
Дерканосова ◽  
Natalya Derkanosova ◽  
Оробинский ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Mechanical Action ◽  
Belt Conveyor ◽  
Food Grains ◽  
Processed Material ◽  
Bucket Elevator ◽  
Negative Effect ◽  
Working Bodies ◽  
The Individual

Studies of many authors show that injury of seeds has a negative effect, both on seeds and food grains. Damage in food grains reduces its trade, technological and baking performances. The main reasons causing injury to the seed, is mechanical action of the working bodies of machines and implements for post-harvest treatment of seeds. In this injury will be greater, the greater the speed of the seeds moving. Analysis of the distribution of injury between the individual elements of the line revealed that about 50 % of all injury of grain (28.3 %) falls on transporting machines. From above it follows that a reduction of injury to the seeds is an important problem, which is caused by the need to solve large yield losses, worsening of seeds storage and decrease in quality of the seed, and it is necessary firstly to investigate the possibility of improving the quality of conveying machines, and in particular , bucket elevators. This is because grain cleaning machines provide improved cleaning quality of grain, and conveying ones- conversely increase its. Taking into account that in cleaning lines usually there are several elevators, the reduction of seed damage by them will substantially improve the quality of the processed material. For this purpose, it is necessary to improve bucket elevators, providing softer mode. In this regard, the work was done to improve the design of the upper head of the elevator to reduce feedback eruption. On this construction patent for utility model number ZA 140052 was received. On the basis of this patent bucket elevator was refitted, in which head was an additional horizontal belt conveyor. Experimental studies have been conducted to identify the degree of feedback. It was found that an additional belt conveyor helps to reduce feedback rash when its speed is higher than the speed of bucket belt.

scholarly journals Design of stem separator tool with Cyclea Barbata (Cincau) plant leaves to increase business productivity of Sunter Jaya Residents of Jakarta Utara

2020 ◽  
Vol 5 (2) ◽  
pp. 120-126
Author(s):  
Ahmad Yunus ◽  
Ika Kurniaty ◽  
Fatma Sari ◽  
Meri Prasetyawati ◽  
Prian Gagani Chamdareno ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Physical Nature ◽  
Shopping Centers ◽  
Plant Leaves ◽  
Traditional Markets ◽  
Operational Costs ◽  
Leaf Processing ◽  
Processed Material ◽  
Leaf Powder

Cincau (Cyclea barbata) is a plant whose leaves can be squeezed thick for the contents of a drink. This plant is a species of the cyclea genus. Green grass jelly leaves are found in various places in Indonesia, from traditional markets to modern shopping centers. This plant is known as camcao (Javanese), camcauh (Sundanese), juju, kepleng, krotok, tarawalu, tahulu (Malay). There are several types of grass jelly known today, namely green grass jelly, black grass jelly, and oil grass jelly. Indonesian people are fond of green grass jelly because the physical nature of green grass jelly leaves (Cyclea barbata) is thin and limp so that it is easier to form into gelatin or into gelatin. So far, research that examines quality improvement in the processing process has not been given much attention, because many think that the process currently carried out meets the standards. For this reason, through this research, efforts were made to improve the quality of Cyclea barbata leaves through the initial stages of the Cyclea barbata leaf processing process. The stalks and leaves of the henna must be separated from the beginning of the processing process before being processed further, so that the pure processed material comes from Cyclea barbata leaves which produce the best Cyclea barbata leaf powder, so that it is expected to produce quality Cyclea barbata leaf products. For that we need a separator for the leaves and stems of the Cyclea barbata plant. This research is needed to produce a design for separating the stem and leaves of the Cyclea barbata plant. The design of this tool needs to refer to the physical characteristics of the leaves and stems of the Cyclea barbata plant, so that power requirements are reduced and operational costs decrease.

scholarly journals The Use of Pulsed Modes in the Electrochemical Polishing of Corrosion-Resistant Steels

2019 ◽  
Vol 18 (3) ◽  
pp. 200-208 ◽  
Author(s):  
Yu. G. Aliakseyeu ◽  
A. Yu. Korolyov ◽  
V. S. Niss ◽  
A. E. Parshuto ◽  
A. S. Budnitskiy
Keyword(s):  
High Efficiency ◽  
Metal Removal ◽  
Energy Costs ◽  
Technological Parameters ◽  
Precision Engineering ◽  
Surface Polishing ◽  
Processed Material ◽  
Low Energy Consumption ◽  
Quality Surface

However, the ECP in its classical form has a number of significant drawbacks. One of them is a dependence of treatment modes and electrolyte compositions on the processed material. In addition, aggressive expensive electrolytes that require special technologies for disposal are used for ECP. Electrolytes in ECP often require heating to a temperature of 60–90 °C. Processing at such temperatures causes significant harm to the environment and production personnel. To eliminate the existing disadvantages of the ECP and expand its technological capabilities, a processing method with application of pulsed unipolar and bipolar modes has been proposed. As a result, fundamentally new processes of pulse ECP with a pulse duration of 0.05–20.00 ms have been developed. They provide a reduction of energy costs for the process and high efficiency of polishing in comparison with traditional DC polishing. The rate of smoothing micro-roughness of the treated surface related to the total metal removal is significantly increased. The use of pulse modes in comparison with traditional ECP allows processing in universal electrolytes of simple compositions based on sulfuric and orthophosphoric acids without addition of chromium anhydride. Application of the developed pulse modes, which will provide at low metal removal a significant change in surface roughness, is the most appropriate for the ECP of precise parts, products or parts of small cross-section and rigidity, such as medical devices for minimally invasive surgery, precision engineering parts, etc. The paper presents results of a study for influence of pulsed unipolar and bipolar ECP modes on the surface quality of stainless steel specimens, as well as a comparative analysis of the efficiency of using pulsed ECP modes instead of DC polishing. The technological parameters of ECP using pulsed modes, providing the highest quality surface polishing with high efficiency of micro-roughness smoothing and low energy consumption have been established in the paper.

Methods of Considering Reliability in the Quality Evaluation Procedure for Composite Metal Cutting Tools

2015 ◽  
Vol 770 ◽  
pp. 216-220 ◽  
Author(s):  
E.V. Artamonov ◽  
D.S. Vasilega ◽  
M.S. Ostapenko
Keyword(s):  
Metal Cutting ◽  
Quality Evaluation ◽  
Cutting Tools ◽  
Cutting Edge ◽  
Evaluation Procedure ◽  
Processed Material ◽  
Thermal Compatibility ◽  
Take All

In terms of method for evaluating the quality of composite metal cutting tools, a need to regard reliability as a factor, consisting of several components, is grounded. It is discovered, that thermal compatibility of processed material and material of the tool, has a significant impact on composite cutters’ durability. So does the force of stress, created in the cutting edge. In order to take all these factors into account when evaluating the quality of metal cutting tools, the need to include stress and thermal compatibility coefficients has been proven. Means to determine the attributes needed and formulas for calculation of those coefficients had been developed. The methods we created can be used for the evaluation of both the existing tools and for the perspective tools currently being developed.

scholarly journals AUTOMATED TECHNOLOGICAL PROJECTION OF CLASSIFICATION PROCESSES OF DRY DISPERSIVE MATERIALS

2021 ◽  
pp. 15-21
Author(s):  
Ivan Sevostianov ◽  
Oleksii Tokarchuk ◽  
Maryna Pidlypna
Keyword(s):  
Food Processing ◽  
Raw Materials ◽  
Mass Density ◽  
Wide Spread ◽  
Technological Processes ◽  
Processed Material ◽  
Effective Technology ◽  
Selection Of

Processes of classification (separation) of dry and damp dispersive materials are wide spread in metallurgy, construction, agriculture, in chemical, food, processing industry and in other branches. Therefore, constructors and technologists pay a lot of attention for rationalization of these processes and equipment for their realization in direction of increase of productivity and quality of classification, reliability of machines, decrease of power-consuming. In last decades in Ukraine with development of small and middle farming enterprises there is a tendency of increase of variety of grain raw materials by kinds, grades, humidity, sizes, mass, density and volume of particles. All this should consider food and processing enterprises which often work in quite intensive regime in a period of harvest. So, in last time there become more strong demands to efficiency of technological preparation of processes classification for selection of most rational method, equipment and regimes of processing with consideration of parameters of raw materials and demands of further technological processes (grinding, mixing, heating, cooking, frying etc). Because of that, there will be useful a method of automated technological projection of classification processes of dry dispersive materials, proposed in this article. The method allows to elaborate most effective technology of classification with consideration of volume of output program, time for its fulfilment, geometrical and structural-mechanical properties of processed material, characteristics of available equipment for classification and criterions of efficiency of elaborated technology – productivity and specified operational expenses for its realization. The method can be used as a base for elaboration of a computer program of automated synthesis and analysis of rational technological processes of classification of grain raw materials.

Rough Reading

2019 ◽  
pp. 172-187
Author(s):  
Alex Purves
Keyword(s):  
Aesthetic Perception ◽  
Material Surfaces ◽  
Dionysius Of Halicarnassus ◽  
Experiential Process

This chapter argues that reading is portrayed in Dionysius of Halicarnassus, Ps.-Demetrius, and Ps.-Longinus as an experiential process dependent upon the smooth or rough quality of both objects and words. It focuses on two material surfaces which recur in ancient descriptions of Homer’s austere method of composition—first wool, which is tangled, unworked, and a mix of the material and ethereal; then stone, whose unhewn surface slows down and burdens the hands of Polyphemus and Sisyphus in the Odyssey. Drawing on the work of both Herder and Shklovsky on aesthetic perception, the chapter argues for an ancient understanding of reading based on a haptic model of contemplation, wherein a word’s weight or texture mimetically and temporally interacts with the events being narrated.

Development of Sound Absorbent Material Based on Waste and Bamboo Fiber

2015 ◽  
Vol 1112 ◽  
pp. 367-370 ◽  
Author(s):  
Arjuni B. Pantjawati ◽  
Enjang A. Juanda ◽  
Budi Mulyanti ◽  
Azis Mujtahid ◽  
Aldi Wiryadi
Keyword(s):  
Absorption Coefficient ◽  
Sound Absorption ◽  
Bamboo Fiber ◽  
Sound Absorption Coefficient ◽  
Drying Process ◽  
Absorbent Material ◽  
Processed Material ◽  
Acoustic Quality ◽  
Inorganic Waste

Sound absorbent material is used to improve acoustic quality of room as it can damp noise level and reduce echo. As the manufacturing costs are quite expensive, nowadays, utilization of sound absorbent material is still limited to commercial needs, such as karaoke room, movie theater and music studio. Utilizing waste into sound absorbent materials can provide multiple benefits as it can reduce production cost and landfill waste as well. This research was conducted experimentally with parameter measured was sound absorption coefficient. An organic waste such as vegetable waste and an inorganic waste such as plastic, paper, and fabrics waste were processed through crushing and drying process. The processed material was mixed with bamboo fiber and an organic Nano silica (rice husk). The Compound was used as filler and was mixed with polyvinyl acetate (PVAc) as a matrix. From this research, it was concluded that composite material from waste with bamboo fiber could qualify ISO 11654, 1997 standard as a sound absorbent material E class category with weighted sound absorption coefficient value, αw= 0,25(M). This material has a good sound absorption quality in frequency range 500-1250 Hz with highest absorption α = 0.82 at 800 Hz.

scholarly journals Damping Cutters with Varying Stiffness

2020 ◽  
Vol 23 (6) ◽  
pp. 45-55
Author(s):  
V. V. Malykhin ◽  
E. I. Yatsun ◽  
S. G. Novikov
Keyword(s):  
Vibration Damping ◽  
Theoretical Research ◽  
Existing Structures ◽  
Labour Intensity ◽  
Operational Characteristics ◽  
Processed Material ◽  
Stiffness Variation ◽  
Goals And Objectives ◽  
Dominant Part

Purpose of research.  Improving surfaces' forming by a blade tool is an up-to-date task. Labour intensity of turning processing is a dominant part of all working. Vibrations during turning work are the result of premature tool wear and increased surface roughness of the parts. New cutter designs are of practical and scientific interest. They can reduce vibrations occurring during cutting, increase their persistence and improve processing quality. The aim and objectives of this proposed structural line of damping cutters with adjustable (controlled) rigidity are improvement of cutting tool structures, which allow to increase its resistance due to vibration damping; creation of efficient technological processes of cutting materials, which improve quality of treatment; improved operational characteristics of cutters.Methods. Existing structures of vibration damping cutters with elastic damping pieces of constant rigidity, in which holder or mandrel with cutting plate is installed, do not have necessary requirements for efficiency of vibration reduction due to impossibility of tool stiffness variation. Besides, there is high labour intensity of cutters preparation for operation and dismantling. Innovative cutter designs with adjustable (controlled) rigidity are presented.Results. The developed line of vibration-quenching cutters with rigidity variation and taking into account disadvantages of existing structures makes it possible to control vibration frequencies of perturbating force and components of a tool system which excludes uncontrolled growth of vibration amplitude and significantly prolongs efficiency of cutters with high quality of processing. It depends on processed material and cutting process modes. Existing and new designs of damping cutters make it possible to classify them. So it is possible to carry out research on their improvement.Conclusion. Proposed damping cutters with varying rigidity meet goals and objectives. According to theoretical research and industrial tests, simplicity of structures and technologies of new damping cutters manufacturing it is possible to implement them into production. 

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