Research on Chrome Plating Quality of the Internal Surfaces in the Hydraulic Drives with Hydrostatic Guideways

2021 ◽  
Vol 1037 ◽  
pp. 417-422
Author(s):  
Dmitrii V. Ardashev ◽  
Nizami Yusubov ◽  
Leonid V. Shipulin ◽  
Anastasiya Degtyareva-Kashutina
Keyword(s):  
Internal Surface ◽  
Chrome Plating ◽  
Technical Requirements ◽  
Internal Surfaces ◽  
Measurement Results ◽  
Chrome Coating ◽  
Hydraulic Cylinders ◽  
Roundness Deviation ◽  
Coating Hardness

The article presents a study of the characteristics of experimental samples with a chrome coating: the straightness and ovality of the inner surface of the cylinder, as well as the hardness and thickness of the chrome coating. The chrome coating is obtained on a previously developed installation for applying chrome coating on the inner surfaces of hydraulic cylinders of hydraulic drives with hydrostatic guides. The measurement of the geometric characteristics of the internal surface of the samples was carried out, the values ​​of deviations from roundness and deviations from straightness were obtained. A study of the chrome coating was carried out, for this we cut out sectors from the samples, carried out their sample preparation, measured the hardness and took pictures under a microscope, measured the hardness and thickness of the chrome coating. The obtained measurement results: deviation from roundness, deviation from straightness, coating hardness, coating thickness - correspond to the specified technical requirements, the proposed construction of the installation for applying chrome coating to the inner surfaces and the electrolyte composition, selected earlier, are applicable for chrome plating of the inner surfaces.

scholarly journals Possibilities of Monitoring the Technical Condition of the Combustion Engine with Starter Load Current

2014 ◽  
Vol 62 (5) ◽  
pp. 961-969
Author(s):  
Michal Jukl ◽  
Adam Polcar ◽  
Jiří Čupera
Keyword(s):  
Combustion Engine ◽  
Technical Condition ◽  
Load Current ◽  
Technical Requirements ◽  
Indirect Control ◽  
Harmful Emissions ◽  
Measurement Results ◽  
Engine Wear ◽  
The Individual

This article deals with the verification of relations between the electric current of engine starter and tightness of the combustion chamber and the possibility of its use for the evaluation of the state in terms of engine wear. Engine wear is closely related to the quality of fuel combustion and also with the amount of produced harmful emissions. On this basis, it would be possible to extend the technical requirements of the protocol OBD to include the indirect control of engine wear. To meet the objectives set out above measurement was carried out by a petrol engine, which was located in the vehicle Škoda Felicia Combi GLX 1.3 The whole measurement was divided into several parts. The first measurement was carried out on the abovementioned motor without simulating leakage. The second measurement was performed when the leakage of one cylinder was simulated. Simulated leakage was conducted at removing the spark plugs. Other measurements simulated “mild” leak of the whole engine – all cylinders. Leakage was implemented by loosing all the spark plugs about 8 turns against full tightening with the appropriate torque. The last, fourth measurement simulates a “large” leaks of engine cylinders. This leakage was induced by removing all the spark plugs from all cylinders. As the measurement results showed leakage of one cylinder, and also the whole engine is reflected not only in the individual amplitude of the starter current, but also the shape of the entire curve.

scholarly journals Оptimization of the chrome plating bath operation during the restoration of vehicle parts

2021 ◽  
Vol 18 (4) ◽  
pp. 390-405
Author(s):  
A. N. Kotomchin
Keyword(s):  
Trivalent Chromium ◽  
Stable Operation ◽  
Plating Bath ◽  
Optimal Amount ◽  
Chrome Plating ◽  
High Productivity ◽  
Chromium Plating ◽  
Chrome Coating ◽  
The Stability

Introduction. In the process of chrome plating of car parts, there is a change in the composition of the chrome plating bath, which affects the stability of the ongoing processes – the performance and quality of the chrome coating. Therefore, it is necessary to constantly monitor the chrome plating bath for the presence of foreign elements that can be formed during the operation of the bath during the reaction of the solution with the anode or cathode.Materials and methods. During the research, the necessary equipment was used, which made it possible to determine with sufficient accuracy the content of trivalent chromium and its effect on the electrolysis process – the performance and quality of chrome coatings. A well-known technique was used to determine the quality and performance.Results. When conducting studies of the obtained cold self-regulating chromium plating electrolyte, it was found that trivalent chromium has a significant effect on the stability of the chromium plating bath. The content of which can vary within 2...25 g/l during operation. As a result, it was found that the optimal amount of trivalent chromium is its content in the chromium plating bath from 2 to 15 g/l. With a lower or higher content, the electrolysis performance and the quality of the chrome coating decrease. It was also found that in order to maintain the optimal amount of trivalent chromium and increase the time for stable operation of the chromium bath, it is necessary to observe the ratio of the area of the anode and cathode (the coated surface of the part), the value of which is within 3...4.Discussion and conclusion. As a result of the conducted research, it will make it possible, under certain conditions, to carry out the process of chromium deposition from a cold self-regulating electrolyte, which will allow for stable chromium deposition at high productivity and the necessary quality of the coatings obtained. The main condition is to control and maintain the amount of trivalent chromium in the chromium plating electrolyte in the bath.

Technological Principles of Internal Surfaces Finishing by Forced Electrolytic-Plasma Polishing

2019 ◽  
Vol 822 ◽  
pp. 634-639
Author(s):  
Mihail Mihailovich Radkevich ◽  
Ivan Sergeevich Kuzmichev
Keyword(s):  
Surface Layer ◽  
Internal Surface ◽  
Work Piece ◽  
Waveguide Devices ◽  
Internal Surfaces ◽  
To Receive

Technological difficulties of manufacture, typical to the large number of crucial elements of certain assemblies: tubes of fuel systems, details of waveguide devices, smooth gun barrels and other tubular details. Difficulties associated with the finishing of the internal surfaces of these products. Therefore, great interest is to find a finishing technology, which allow processing such products. The kind of electrolytic-plasma polishing technology - forced electrolytic-plasma polishing (FEPP) allows to receive homogenous quality of an internal surface layer along processed tubular work piece.

An Analysis of On-Bord High-Voltage Converters of Single-Phase Alternating Current with Increased Miroelectric Power Factor

2020 ◽  
Vol 10 (10) ◽  
pp. 44-51
Author(s):  
Yury Yu. SKOROKHOD ◽  
◽  
Sehgey I. VOL’SKIY ◽  
Keyword(s):  
High Voltage ◽  
Single Phase ◽  
Input Current ◽  
Voltage Converter ◽  
Input Unit ◽  
Power Circuit ◽  
Electrical Systems ◽  
Static Converters ◽  
Technical Requirements

The power circuit arrangements of on-board high-voltage static converters fed from a 3000 V AC single-phase network that in the general case produce multi-channel AC and DC output voltages are considered. The basic technical requirements posed to such converters are formulated. The general structural diagram of high-voltage converters with improved electric power consumption quality is given. Possible power circuit arrangements for the high-voltage converter input unit based on single-phase input current correction devices are considered. A classification and criteria for comparative evaluation of the possible power circuit arrangements of these devices are proposed. The information presented in the article will be of interest for specialists engaged in designing on-board electrical systems involving high-voltage converters that must comply with strict requirements for the quality of consumed single-phase input current.

Experimental Research on Vacuum Diffusion Bonding of AS-Extruded AZ61 Magnesium Alloy

2013 ◽  
Vol 788 ◽  
pp. 34-37
Author(s):  
Fei Lin ◽  
Jie Li ◽  
Hong Wei Zhao ◽  
Zhi Tong Chen ◽  
Qing Sen Meng
Keyword(s):  
Magnesium Alloy ◽  
Diffusion Bonding ◽  
Diffusion Theory ◽  
Holding Time ◽  
Atomic Diffusion ◽  
Az61 Magnesium Alloy ◽  
Measurement Results ◽  
Diffusion Temperature ◽  
Shearing Strength

Vacuum diffusion bonding of as-extruded AZ61 magnesium alloy was investigated according to atomic diffusion theory. The effects of the diffusion temperature and holding time on the quality of the bonding joint are investigated by means of microstructure analysis, shearing strength test and microhardness testing. The shearing test results showed that the maximum shearing strength reached 51.95MPa with the temperature of 470°C and the holding time of 90min. And the diffusion temperature and holding time have a great effect on the quality of the bonding joints. The microhardness measurement results showed that the microhardness value at the bonding joint was maximum.

Influence of Roller on Tooth Height of Internal Spline Formed by Spin-Forming

2012 ◽  
Vol 522 ◽  
pp. 268-271
Author(s):  
Ling Yan Sun ◽  
Qin Xiang Xia ◽  
Xiu Quan Cheng ◽  
Bang Yan Ye
Keyword(s):  
New Technology ◽  
Internal Surface ◽  
Height Distribution ◽  
Forming Force ◽  
Nose Radius ◽  
Forming Process ◽  
Element Simulation ◽  
Gear Manufacturing ◽  
Spinning Force

Spin-forming of part with internal tooth is a new technology of the near-net forming in gear manufacturing field. And the main purpose of the parts spin-forming is to shape teeth on the internal surface of blank. In order to improve the forming quality of internal tooth, the effect of roller on tooth height of spline was investigated by processing experiments and finite element simulation. The result indicates that, for full-radius roller, a large nose radius has also witnessed a discernible growth in spinning force and tooth height; considering the uniformity of tooth height distribution of spun part and decrease in forming force, the bio-conical roller is more suitable for this forming process

scholarly journals Making roundness measurement applications and control systems on the Roundness Tester Machine

2019 ◽  
Vol 63 (3) ◽  
pp. 17-21
Author(s):  
Dodi Sofyan Arief ◽  
◽  
Eko Jadmiko ◽  
Adhy Prayitno ◽  
Muftil Badri ◽  
...  
Keyword(s):  
Control Systems ◽  
Measurement Data ◽  
Rotating Speed ◽  
Center Point ◽  
Global Quality ◽  
Measurement Results ◽  
Roundness Deviation ◽  
And Control ◽  
Dial Indicator ◽  
Roundness Measurement

Dial indicator is a comparison device usually used in industrial activities, especially in production. To make measurements at this time must be supported by technology that can facilitate operators when using it and when analyzing measurement results. Involving the programme and microcontroller are a solution to developing in roundness measurement, and then the results can be more accurate or thorough between the readable values read from the measuring instrument with the actual value of varying the amount of data. Roundness application is a program that can input measurement data automatically and can do calculations directly. Then, it can display a reference circle, a table that calculates the values of X, Y, R, X’, Y’, R’, Roundness Deviation, Run out Concentricity or a shift in the center point and also the center point shift or Theta. In measuring roundness, the test object is used the Standard Mandrel which has been certified by PT. Global Quality Indonesia, by determining three points or positions, namely in the first position the amount of data is 180, in the second position the amount of data is 90 and in the third position, the amount of data is 60 with a rotating speed of 15 mm/s. The results of the reference circle can be seen in each calculation in each position, in the second position the roundness deviation values are approaching of the Mandrel.

scholarly journals UNCERTAINTY OF MEASUREMENT RESULTS IN FUEL ANALYSES

2002 ◽  
Vol 1 (2) ◽  
Author(s):  
Paulo Roberto Guimarães Couto ◽  
Ilse Maria Guilhermino Lemos
Keyword(s):  
Mutual Recognition ◽  
Metrological Reliability ◽  
Uncertainty Of Measurement ◽  
Measurement Results ◽  
Judicial Ruling ◽  
Quality Of Products ◽  
Reliability Of Measurement Results

The result of a measurement serves as a parameter in a variety of applications, such as: the sale of products; the inspection of materials in relation to specifications/ limits set by a standard; providing support for a judicial ruling; improving the specific quality of products; estimating profitability and making comparisons with a view to mutual recognition between metrology laboratories and systems. The aim of this work is to demonstrate the relevance and applications of the ISO GUM 95 in the fuel analyses conducted by the LABCOM at the EQ/UFRJ, presenting results tables and discussions. The paper further discusses the strategic importance of metrological reliability of measurement results and of the actions of a laboratory within the context of the science of metrology in Brazil.

scholarly journals Technical requirements for acceptance of works on track

Tehnika ◽  
2020 ◽  
Vol 75 (4) ◽  
pp. 437-444
Author(s):  
Zdenka Popović ◽  
Luka Lazarević ◽  
Milica Mićić ◽  
Nikola Mirković
Keyword(s):  
Legal Framework ◽  
Special Importance ◽  
European Standard ◽  
Track Geometry ◽  
Technical Requirements ◽  
National Technical ◽  
Track Condition ◽  
Measurement Results ◽  
The Republic ◽  
Technical Regulations

This paper presents technical requirements for acceptance of track works according to European standard EN 13231-1, which was adopted as Serbian standard in 2014. The standard applies to track with standard gauge (1435 mm) layed in ballast bed. Requirements for acceptance of works should be applied for laying of the new track, as well as for reconstruction, renewal and maintenance of the existing track. Paper points out that, despite of established legal framework in the Republic of Serbia, national technical regulations are still not harmonised with the requirements of the standard. The special importance is drawn to establishment of the procedures for measuring the relevant parameters and controling the track condition, as well as procedures for documenting measurement results and performed controls. In addition, paper shows prescribed tolerances for track geometry parameters and track superstructure elements according to EN 13321-1. Acceptance deadline has special importance and it should be defined in the contract between Infrastructure Manager and Contractor.

scholarly journals An insight into the quality of internal built environment in Vladivostok. Part 1: Studying background radiation in residential premises

2020 ◽  
pp. 28-47
Author(s):  
Vladimir A. Drozd ◽  
Valery V. Temchenko ◽  
Yuri V. Chubov ◽  
Vladimir N. Kustov ◽  
Kirill S. Golokhvast
Keyword(s):  
Built Environment ◽  
Gamma Radiation ◽  
Background Radiation ◽  
Residential Buildings ◽  
Living Environment ◽  
Research Project ◽  
Apartment Buildings ◽  
Measurement Results ◽  
Background Gamma Radiation

Introduction. The article addresses background gamma radiation in residential premises of apartment buildings in Vladivostok. This study is based on earlier research undertakings focused on the sick building syndrome (SBS), which proves its high relevance. The research is focused on the intensity of background gamma radiation in the residential premises of apartment buildings in Vladivostok. New data obtained in the course of the field experiments, the scale of their analysis, the coverage of substantive issues concerning radiation intensity and its monitoring in residential buildings guarantee the novelty of this research project. These findings also have a practical value that deals with environmental safety. Materials and methods. Onsite examinations were conducted in the form of background gamma radiation measurements taken in versatile apartment buildings, built at different times and made of different materials. Results. This section contains analytical information about the lack of influence of the location of apartment buildings on background radiation inside the apartments examined within the framework of this research project. Measurement results represent a range of values depending on construction materials used. Principal regularities, derived from the measurement results, are based on the time of operation of residential buildings, which is of practical importance. Conclusions. Patterns of influence of building parameters on background radiation inside apartments allow to assess the condition of residential buildings. Background radiation information can be entered into BIM databases and used to formulate the approach to the design of buildings and urban infrastructure so that they were focused on their residents and users. Background radiation research findings, entered into the database and contributed to design algorithms which are customized to the needs of urban residents, will enable designers to project the overall quality of the living environment encompassing the built environment analyzed in this article and other nearby buildings and structures located in Vladivostok.

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