scholarly journals Measurement of Outside Thread Pitch Distance Results of TONGTAI TCS 1500[M] CNC Lath Using Profile Projector

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Jaja Miharja ◽  
Heru Santoso ◽  
Hery Adrial ◽  
Muhamad Japar
Keyword(s):  
Machining Process ◽  
Industrial Technology ◽  
Average Value ◽  
Thread Pitch ◽  
Three Samples ◽  
Cnc Lathe ◽  
High Level ◽  
A Minor ◽  
Pitch Distance ◽  
Test Objects

Research has been carried out on the Measurement of the Outer Thread Pitch Distance from the Tongtai Tcs 1500[M] Cnc Lathe Using a Projector Profile. The use of a screw system to unite two components, is almost always found in all industrial technology results from the form of industrial technology with a low level of accuracy (rough) to a very high level of precision (precision). Therefore the screw system has become one of the important factors in industrial progress in all types of production. The higher the level of a component made means the higher the level of accuracy of the thread system. In this study, calculations were carried out to determine the level of precision of a thread made through the machining process using a TONGTAI TCS 1500 [M] CNC lathe. The precision measurement was carried out by measuring using a dimension measuring instrument, namely Profile Projector type HST-CPJ-3000/3000Z. To find out the average value and the value of the screw deviation, a research and measurement process was carried out with several product samples or test objects (sample A, sample B, sample C) where each sample was the same size, namely M15 × 50 P 1.5. The first measurements were made on the major and minor diameters. Because this measurement is more focused on the level of precision of the thread pitch distance, the second measurement is carried out by measuring the dimensions of the distance between the pitches as much as N = 10. From the 10 measuring points of the thread pitch distance, different average values and deviation values will be produced although in the same size.. The purpose of this study was to determine the level of pressure of a thread made through a machining process which in this study used a CNC TONGTAI TCS 1500 [M] lathe. it is known that the overall average value of the three samples is with a major diameter = 14,949 mm, a minor diameter = 13,219 mm, and a thread pitch distance = 1.5309 mm. 

scholarly journals Pengaruh Kecerdasan Logika Matematika Terhadap Disposisi Matematis Siswa

2019 ◽  
Vol 4 (1) ◽  
pp. 48-57 ◽  
Author(s):  
Anah Maemanah ◽  
Widodo Winarso
Keyword(s):  
Test Analysis ◽  
Average Value ◽  
Ex Post ◽  
Three Samples ◽  
Regression Test ◽  
Ex Post Facto ◽  
Mathematical Problems ◽  
Mathematical Dispositions ◽  
High Level ◽  
Simple Regression

This study aims to determine the influence of logic smart on students' mathematical dispositions. The method is quantitative with ex post facto approach — the population of class XI MIPA MAN 2 Cirebon and three samples taken by random sampling. Data collection uses logic smart tests and questionnaires was then analyzed using a simple regression test. Analysis and interpretation of data show that logic smart of students at coherent level with the average value is 65.93 and 57%, mathematical disposition of students is at a high level with a percentage of the average indicator value is 70%, and there is a significant influence between logic smart with the mathematical disposition of 63.2% and a significance value of 0.00<0.05. So, the teacher should improve the logic of smart students through logical thinking, as well as counting ability accompanied by observations to solve mathematical problems because it has implications for the ability of students' mathematical dispositions.

3D-to-2D Mapping of Cutter Paths in NC Programming of Complex Engineering Parts

1993 ◽  
Author(s):  
Chao-Hwa Chang
Keyword(s):  
Three Dimensional ◽  
Machining Process ◽  
Milling Machine ◽  
Systematic Method ◽  
Nc Programming ◽  
Cutter Path ◽  
Nc Milling ◽  
Complex Engineering ◽  
High Level ◽  
Mapping Concept

Abstract The concept of mapping a three dimensional (3D) contouring cutter path with major motion in a plane parallel to the Z axis onto the X-Y plane or one perpendicular to the Z axis is introduced. A systematic method is developed that can be used to program, in APT or other high-level languages, complex contouring cutter motion based on the concept introduced. As a result, NC programming of contouring motion for many complex engineering parts on a 3-axis numerically controlled (NC) milling machine, which is often considered difficult, can be greatly simplified. Part examples are discussed; and the APT programs defining the cutter path based on the 3D-to-2D mapping concept, are also analyzed in detail. The concept and method introduced proved to be a powerful tool for programming the NC machining process for many parts, particularly dies and molds.

Study on Improving Accuracy in Robotic Milling of Aluminum Alloy

2018 ◽  
Author(s):  
Shaochun Sui ◽  
Kai Guo ◽  
Jie Sun ◽  
Yiran Zang
Keyword(s):  
Aluminum Alloy ◽  
Industrial Robot ◽  
Vibration Signal ◽  
Industrial Robots ◽  
Machining Process ◽  
Cnc Machine ◽  
Machined Surface ◽  
Improving Accuracy ◽  
High Level ◽  
Monolithic Components

Nowadays, the application of using industrial robots in manufacture is a diminutive due to its own low rigidity and low stiffness. This leads to high level of vibrations that limits the quality and the precision of the workpiece. So they are usually used for welding, grinding and paint shop. However, the potential of industrial robot applications in machining has be realized. The volume of monolithic components is large and there are many issues in machining process such as geometric tolerance and quality of machined surface. In such cases the traditional CNC machine is replaced by industrial robots, which will reduce the production cost, reduce labor and increase the efficiency. In this paper, the milling experiment of 7050-T7451 aeronautical aluminum alloy was carried out by using industrial robot KR210 R2700. In addition, the experiment was employed to study the influence of milling speed, feed-rate, cutting depth and cutting width on vibrations, surface roughness was also measured to evaluate the machining quality. Besides, the axis of angle was changed which led to the different industrial robot’s postures. The vibration signal of different postures was acquired, which was used to analysis the optimal workspace of industrial robot. The best process parameters were obtained, which will play a guiding significance on the actual production.

scholarly journals Some aspects of the forensic assessment of the reliability of the testimony of minor victims

2021 ◽  
pp. 69-71
Author(s):  
Ruslan Zaynullin
Keyword(s):  
Legal Regulation ◽  
Forensic Assessment ◽  
Empirical Methods ◽  
Problem Statement ◽  
Dialectical Logic ◽  
Theoretical Methods ◽  
High Level ◽  
A Minor

Problem statement: in the course of analyzing the legal regulation and practice of the participation of minor victims in verbal investigative actions, the author in this article identifies the problem of assessing the reliability of the testimony of minor victims. Objective: to develop general forensic recommendations for criminalistically ensuring the participation of a minor victim in verbal investigative actions, designed to ensure a high level of reliability of their testimony. Methods: empirical methods of comparison, description, theoretical methods of formal and dialectical logic. Results/brief conclusions: gaps in the legal regulation of the participation of a minor victim in verbal investigative actions are identified, and forensic recommendations are formulated to ensure that reliable testimony of minor victims is obtained.

Developed of High Voltage Bushing with New Shielding Technology for High Voltage Switch Cabinet

2015 ◽  
Vol 737 ◽  
pp. 247-251
Author(s):  
Fu Yun Zhu ◽  
Zhi Hui Lu ◽  
Hong Jun Ni ◽  
Shuai Shuai Lv ◽  
Xing Xing Wang
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Metal Mesh ◽  
Voltage Level ◽  
Conductive Material ◽  
Average Value ◽  
Three Samples ◽  
Result Show ◽  
Aluminum Cylinder ◽  
The Way

TGZ10A-40.5 wall bushing of high voltage switch cabinet from one company was taken as applied research object. Reference the development process of high voltage cable shielding technology, three samples were designed and produced depending on different sets of the shield system. The result show that: surfaces processed by the way that the inner (aluminum cylinder) and the outer (metal mesh ring) shielding components were coated with a semi-conductive material, made little sense to improve the withstand voltage level and reduce the partial discharge; surface processed by the way that inner shield component (aluminum cylinder) was coated with semi-conductive material, the outer shield component (metal mesh ring) was not coated with semi-conductive material, was obviously influenced the improvement of the withstand voltage level and reduction of the partial discharge, compared with traditional technology, the average start voltage of corona increased 23.8%, the average value of partial discharge dropped 27.7%.

The chromian spinels of the Lyavaraka ultrabasic complex, Serpentinite Belt, Kola Peninsula, Russia: Patterns of zoning, hypermagnesian compositions, and early oxidation

2021 ◽  
Vol 59 (6) ◽  
pp. 1693-1709
Author(s):  
Andrei Y. Barkov ◽  
Andrey A. Nikiforov ◽  
Vladimir N. Korolyuk ◽  
Larisa P. Barkova ◽  
Robert F. Martin
Keyword(s):  
Kola Peninsula ◽  
First Generation ◽  
Ferric Iron ◽  
Chromian Spinel ◽  
Maximum Value ◽  
Two Generations ◽  
High Level ◽  
A Minor ◽  
Compositional Series ◽  
Minor Quantity

ABSTRACT The maximum value of Mg# [= 100Mg/(Mg + Fe2+ + Mn)] in chromium-bearing spinel-group minerals (Chr) in the Ultrabasic Core Zone (UCZ) of the Lyavaraka orthopyroxenite – harzburgite – dunite complex of the Serpentinite Belt in the Kola Peninsula is 54.5–67.5. Such highly magnesian compositions of spinel are associated with notable enrichments of ferric iron (Fe3+# 58–63). There are two generations of accessory Chr in the UCZ unit. The first generation occurs as inclusions in olivine that is not unusually magnesian (Mg# 90.3), and the second is closely associated with serpentine. The compositional series of Chr at Lyavaraka attains more aluminous compositions than was observed in nearby intrusive bodies. The anomalously high level of Mg in Chr, also manifest in ilmenite, is mainly a result of the high intrinsic fugacity of oxygen attained locally in the melt. A progressive buildup in H2O and increase in fO2 likely resulted from efficient vesiculation and selective loss of H2 from the Al-undepleted komatiitic magma crystallizing in a shallow setting. The chromian spinel forming in such a modified magma is virtually unzoned in Mn, and a minor quantity of Mn is also present in olivine and orthopyroxene. In contrast, zinc is strongly partitioned in the core of Chr, as it is relatively incompatible in the coexisting olivine and orthopyroxene at that stage. Zinc efficiently partitioned into the H2O-enriched melt, which crystallized as the pegmatitic orthopyroxenite near the contacts at Lyavaraka. A high potential of oxidation appears to be characteristic of all orthopyroxenite – harzburgite – dunite suites of the Serpentinite Belt formed from a primitive melt of komatiitic composition.

Comparative evaluation of surface roughness and texture of polished nanofill and nanohybrid composites using profilometer and scanning electron microscope: in - vitro study

2017 ◽  
Vol 9 (2) ◽  
pp. 4-10
Author(s):  
Krishna Prasada L ◽  
Jyothsna S Jathanna ◽  
Naveen Kumar ◽  
Ramya M.K ◽  
Elizabeth Issac
Keyword(s):  
Surface Roughness ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Resin Composite ◽  
In Vitro Study ◽  
Average Value ◽  
Three Samples ◽  
Group B ◽  
Scanning Electron

BACKGROUND: To determine the effectiveness of three polishing systems on three different composite materials by evaluating surface roughness using a Profilometer and Scanning electron microscope. METHODOLOGY: A total of Sixty-three resin composite disks were prepared in rectangular acrylic mould of 8×2mm dimension, with 4mm thickness. Specimens were made of light activated resin composite Filtek Z-250-XT, Tetric-N-Ceram bulkfill, Ceram X Duo. The sixty-three samples were divided into three groups of twenty-one samples each i.e. Group A (Filtek Z-250-XT), Group B (TetricN-Ceram bulkfill) and Group C (Ceram-X-Duo).Out of 21 samples of each of the material, 7 specimens were polished with multi enhance polishing agents, 7 specimens were polished with super snap polishing agents and 7 specimens were polished with sof-lexdiscs.Surface roughness of each sample after polishingwasevaluatedusingProfilometer and Scanning electron microscope. RESULTS: One-way anova and kruskalwallis test was used for statistical analysis. Ceram-X-Duo gave least roughness average value with Super snap polishing system when compared to multi enhance and sof-lex polishing system. CONCLUSION: Super snap polishing system is a better polishing system than multi enhance and soflex and Ceram-X-Duo composite material offers better polishability compared to Filtek Z-250-XT and Tetric-N-Ceram bulk fill.

Paleoenvironmental Traces of Carbon and Oxygen Isotopes in Carbonate Rocks: An Example From Dengying Formation in Xichuan Area, Henan Province

2020 ◽  
Author(s):  
Lan Zhang ◽  
Hong Xie ◽  
Qingguang Li ◽  
Zhenghao Lu ◽  
Yang Bai ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Carbonate Rocks ◽  
Isotope Composition ◽  
Salinity Range ◽  
Carbon And Oxygen Isotopes ◽  
Accurate Analysis ◽  
Average Value ◽  
Dengying Formation ◽  
Three Samples ◽  
Carbon And Oxygen Isotope

Abstract The carbon and oxygen isotope composition of carbonate rocks is an important index for accurate analysis of the paleo-sea environment, which depends on Mn/Sr, δ 18 O > -10‰, correlativity of δ 13 C and δ 18 O and “age effect” of δ 18 O. This study reports carbon and oxygen isotope data of carbonate rocks from the Dengying Formation in the Xichuan area. δ 13 C values range -1.58‰ to 3.76‰, with an average value of 1.55‰, and δ 18 O values are -14.91‰ to -1.88‰, with an average value of -6.95‰. The δ 18 O values of three samples are less than -10‰, so they are excluded and taken to be correlative with the cracking of the Rodinia supercontinent during the Neoproterozoic. The paleotemperature range 7.40°C to 35.05°C, with an average value of 21.09°C. Paleo-salinity range 8.38‰ to 19.30‰, with an average value of 13.89‰. Z values range 127.80 to 135.03 and thus all exceeded 120, with an average value of 131.25. These calculations indicate that the Xichuan area had deposited marine carbonate rocks, with the hot and dry tropical monsoon climate, and a transgressive process overall during the Dengying age.

scholarly journals An Approach to Sustainable Metrics Definition and Evaluation for Green Manufacturing in Material Removal Processes

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 373 ◽  
Author(s):  
César Ayabaca ◽  
Carlos Vila
Keyword(s):  
Balanced Scorecard ◽  
Environmental Sustainability ◽  
Product Life Cycle ◽  
Material Removal ◽  
Experimental Testing ◽  
Green Manufacturing ◽  
Machining Process ◽  
Process Indicators ◽  
Definition Of ◽  
High Level

Material removal technologies should be thoroughly analyzed not only to optimize operations but also to minimize the different waste emissions and obtain cleaner production centers. The study of environmental sustainability in manufacturing processes, which is rapidly gaining importance, requires activity modeling with material and resource inputs and outputs and, most importantly, the definition of a balanced scorecard with suitable indicators for different levels, including the operational level. This paper proposes a metrics deployment approach for the different stages of the product life cycle, including a conceptual framework of high-level indicators and the definition of machining process indicators from different perspectives. This set of metrics enables methodological measurement and analysis and integrates the results into aggregated indicators that can be considered for continuous improvement strategies. This approach was validated by five case studies of experimental testing of the sustainability indicators in material removal operations. The results helped to confirm or modify the approach and to adjust the parameter definitions to optimize the initial sustainability objectives.

scholarly journals On the Machinability of an Al-63%SiC Metal Matrix Composite

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1186 ◽  
Author(s):  
David Repeto ◽  
Severo Raul Fernández-Vidal ◽  
Pedro F. Mayuet ◽  
Jorge Salguero ◽  
Moisés Batista
Keyword(s):  
Matrix Composite ◽  
Metallic Matrix ◽  
Machining Process ◽  
Special Focus ◽  
High Concentration ◽  
Aluminium Matrix Composite ◽  
Industrial Sectors ◽  
High Microhardness ◽  
High Level ◽  
Very High

This paper presents a preliminary study of aluminium matrix composite materials during machining, with a special focus on their behavior under conventional processes. This work will expand the knowledge of these materials, which is considered to be strategic for some industrial sectors, such as the aeronautics, electronics, and automotive sectors. Finding a machining model will allow us to define the necessary parameters when applying the materials to industry. As a previous step of the material and its machining, an experimental state-of-the-art review has been carried out, revealing a lack of studies about the composition and material properties, processes, tools, and recommended parameters. The results obtained and reflected in this paper are as follows; SiC is present in metallic matrix composite (MMC) materials in a very wide variety of sizes. A metallographic study of the material confirms the high percentage of reinforcement and very high microhardness values registered. During the machining process, tools present a very high level of wear in a very short amount of time, where chips are generated and arcs are segmented, revealing the high microhardness of the material, which is given by its high concentration of SiC. The chip shape is the same among other materials with a similar microhardness, such as Ti or its alloys. The forces registered in the machining process are quite different from conventional alloys and are more similar to the values of harder alloys, which is also the case for chip generation. The results coincide, in part, with previous studies and also give new insight into the behavior of this material, which does not conform to the assumptions for standard metallic materials, where the hypothesis of Shaffer is not directly applicable. On the other hand, here, cutting forces do not behave in accordance with the traditional model. This paper will contribute to improve the knowledge of the Al-63%SiC MMC itself and the machining behavior.

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