Development of a resource-saving technology of production of strip-type profiles by drawing in roller dies using dummy passes

2021 ◽  
Vol 77 (9) ◽  
pp. 1054-1062
Author(s):  
K. Yu. Klyuchnikov ◽  
V. G. Razdobreev ◽  
A. I. Leshchenko ◽  
D. G. Palamar’
Keyword(s):  
Steel Strip ◽  
Machine Building ◽  
Capital Investments ◽  
Height Ratio ◽  
Resource Saving ◽  
Instrument Making ◽  
Wide Range ◽  
Technology Of Production ◽  
Periodic Section ◽  
Drawing Method

The rolling-drawing process is used in the production of a large number of shaped profiles of complex configuration, including thin-walled, strip and periodic section profiles. This process, in comparison with drawing in monolithic dies, allows to reduce energy costs by 20–40 %, to increase deformation in one pass to 40–50 %, to reduce the number of preparatory operations (heat treatment, pickling), to exclude the use of expensive lubricants for drawing. Compared to the production of profiles by the method of cold rolling, the rolling-die process has a higher technological flexibility, does not require significant capital investments when organizing the production of precise profiles. At the same time, due to the presence of tensile stresses at the edges of the profile, which can cause their destruction, the assortment of strip-type profiles produced by this method was previously limited to readymade profiles with a ratio of width to height of no more than two. The authors of this work have previously developed a technology for the production of crimped steel strip with a width-to-height ratio of more than 10 by the rolling-drawing method. However, the developed calibration provides for a large number of transitions, complicates the organization of the production of strip profiles of a wide range of sizes, especially in the production of low-tonnage batches. To decrease the number of transitions, the use of dummy paases was proposed. It was shown that this will make it possible to increase the width-to-height ratio of strip-type profiles to 20, and, accordingly, reduce the production cost. The proposed technology for the production of strip-type profiles by the method of drawing in roller dies using dummy passes will allow to comprehensively solve the problem of providing machine-building and instrument-making enterprises by especially precise profiles of a wide range of sizes.

scholarly journals ANALYSIS OF PRECISION PROBLEMS OF PRECISION INDUSTRIAL ROBOTS

2021 ◽  
Vol 31 (4) ◽  
pp. 110-119
Author(s):  
S. V. Vantsov ◽  
◽  
V. A. Sokolov ◽  
O. V. Khomutskaya
Keyword(s):  
Artificial Intelligence ◽  
Control Systems ◽  
Degrees Of Freedom ◽  
Machine Building ◽  
Industrial Robots ◽  
Technical Documentation ◽  
Instrument Making ◽  
Automatic Control Systems ◽  
Wide Range ◽  
The Future

The article highlights the issues of compliance of the mechanics of manipulators of precision industrial robots (PIRs) with the highest accuracy standards specified in the normative technical documentation and practically achieved in the fields of machine-building, instrument-making and electronic industries. In the spotlight there are the possibilities of systems of multi - connected control of complex spatial mechanisms with excessive degrees of freedom (including manipulators of PIRs), the possibilities of systems of multi-circuit control of PIR drives with precision sensors of linear and angular displacements, velocities, accelerations, acceleration gradients (in the future), the issues of matching these parameters with the parameters of the computational part of control systems — the bit depth of digital sensors (more than 20 digits) with an resolution of less than an arc second. PIR manipulators are used in systems of multi-connected and multi-circuit regulation and control with elements of artificial intelligence, such as automatic adjustment systems (AASs), automatic control systems (ACSs) and artificial intelligence systems (AISs). These problems are considered in a wide range, including the transition to the fields of nanotechnologies, specifically: for linear (nanometers) and angular (hundredths of arc seconds) measurements, as well as the measurements of velocities, accelerations, and acceleration gradients (in the future — for systems with a human operator in the loop, i.e. human-machine systems (HMSs)).

INCREASING THE WEAR RESISTANCE OF THE WORKING BODIES OF AGRICULTURAL MACHINES BY THE HDTV METHOD WITH ADDING POWDER OF THE EED METHOD

2020 ◽  
Vol 4 (141) ◽  
pp. 123-131
Author(s):  
IL’YA ROMANOV ◽  
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
High Frequency ◽  
Machine Building ◽  
Abrasive Wear Resistance ◽  
Research Purpose ◽  
Powder Materials ◽  
Agricultural Machinery ◽  
Resource Saving ◽  
Working Bodies

The development of energy and resource-saving methods and technologies for strengthening and restoring the working bodies of agricultural machinery will increase their abrasive wear resistance and durability by using materials from machine-building waste and reduce the cost by 10-30 percent without reducing operational characteristics. (Research purpose) The research purpose is in increasing the abrasive wear resistance and durability of cultivator legs by surfacing powder materials obtained by electroerosive dispersion from solid alloy waste by high-frequency currents. (Materials and methods) Authors obtained a powder for research on their own experimental installations of the CCP "Nano-Center" of electroerosive dispersion from waste of sintered hard alloys of the T15K6 brand. The microhardness of powders and coatings on microshifts was measured using the PMT-3 device, and the hardness of coatings with the KMT-1 microhardometer was measured using the Rockwell method according to GOST 9013-59. The microwave-40AV installation was used to assess the wear resistance of materials of working bodies of tillage machines. (Results and discussion) In the course of laboratory wear tests the relative wear resistance of samples hardened by high-frequency surfacing currents significantly exceeds the wear resistance of non-hardened samples made OF 65g steel, accepted as the reference standard. (Conclusions) Based on the results of experimental studies, the article proposes a new resource-saving technological process for strengthening the working bodies of agricultural machinery through the use of materials from machine-building waste, which allows increasing the abrasive wear resistance of working bodies by 1.5-2 times due to the use of tungsten-containing materials.

Control of properties and structure of steel vessels by cooling in various media at the outlet of rolling and pressing lines

2021 ◽  
pp. 34-38
Author(s):  
R. L. Shatalov ◽  
V. A. Medvedev
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Metal Structure ◽  
Machine Building ◽  
Regression Equations ◽  
Wide Range ◽  
Industrial Mineral ◽  
Cooling Media ◽  
Technological Limitations ◽  
Non Destructive

When controlling the mechanical properties and structure of vessels made of carbon structural steels manufactured by hot deformation on rolling and pressing lines (PPL) of machine-building enterprises of Russia, such cooling media as water, I20 industrial mineral oil, air are used. The applied cooling media are able to provide the workpieces with a given structure with a wide range of mechanical properties. However, the cooling media have a number of technological limitations and conditions of the use, non-compliance with which leads to reject. When cooled in oil, the probability of ignition is high; when cooled in water, hardening cracks may form, and air is not always able to provide the required rate and uniformity of heat transfer to the environment. The efficiency of control of physical and mechanical properties and structure of deformed vessels made of 50 steel by cooling in TERMAT polymer aqueous solutions in different concentrations on PPL of the plant of JSC NPO Pribor was studied. The effect of varying the concentration from 2 to 9% of TERMAT polymer on the formation of metal structure, as well as physical and mechanical properties of hot-deformed vessels was studied. The results of testing the strength and plastic characteristics of vessels by destructive and non-destructive control methods are presented. According to the results of physical and mechanical properties, regression equations were obtained with at least 95% reliability of R2, which establish the relationship between the controlled plastic and strength parameters of the vessel metal`s properties. The conducted researches allowed to compare the indicators of the main physical and mechanical properties of steel vessels at the PPL outlet and to propose methods of inhomogeneity control that reduce time and material costs by 5–10% during the tests.

scholarly journals COMPETITIVENESS OF DOMESTIC PRODUCTS IN THE INTERNATIONAL MACHINE BUILDING MARKET: REALITIES AND PROSPECTS

2021 ◽  
pp. 80-91
Author(s):  
V.H. Gerasymchuk ◽  
O.O. Zrobok
Keyword(s):  
Mechanical Engineering ◽  
International Competitiveness ◽  
Legal Regulation ◽  
High Energy ◽  
Machine Building ◽  
Capital Investments ◽  
Job Seekers ◽  
Step Method ◽  
Machine Building Complex ◽  
Building Enterprises

The essence of the concept of "product competitiveness" is considered. The factors of competitiveness of products of machine-building enterprises on the international market are systematized. Based on the systematization of quantitative and qualitative methods of assessing the level of competitiveness, a step-by-step method for mechanical engineering enterprises is proposed. The state of the machine-building complex of Ukraine is considered. The dynamics of factors of international competitiveness of machine-building enterprises is analyzed: number of enterprises by machine-building branches; volume of sales and production of machine-building products; shares of mechanical engineering products in domestic exports; capital investments of enterprises in the fields of mechanical engineering. As a result of diagnosing the factors, a PEST-analysis of the domestic machine-building complex with the division of factors into political, economic, social and technological was carried out. It is established that machine-building enterprises of Ukraine have a low level of competitiveness in international markets due to a number of negative factors, the key of which are: insufficient demand in foreign markets, high dependence on fluctuations in resource prices (economic); imperfect legislation, the war in eastern Ukraine (political); technological and moral obsolescence of products and fixed assets, high energy consumption and low productivity, low costs of R&D (technological); lack or outflow of qualified manufacturers abroad, low wages, low motivation of job seekers to employment in the field of mechanical engineering (social). Measures to increase international competitiveness which are proposed include following: preferential lending; revival of basic and applied science; reforming the legal regulation of intellectual property; ensuring compliance of products with European technical regulations. Prospects for the development of domestic engineering: digitalization, development of robotics, technology of Industry 4.0, infrastructure of technology parks.

scholarly journals ENTERPRISE RESOURCE MANAGEMENT

2021 ◽  
Author(s):  
Valentyna Khrapkina ◽  
Hanna Bondarenko
Keyword(s):  
Management System ◽  
State Regulation ◽  
The State ◽  
International Standards ◽  
Resource Saving ◽  
Economic Methods ◽  
Resource Protection ◽  
Wide Range ◽  
Effective System ◽  
Business Entities

The paper analyzes the organization of effective resource saving of the enterprise. Enterprises need to implement innovative technologies and tools, as well as to motivate all participants in the process to achieve high overall productivity. One of the ways to increase the efficiency and rationality of the activity is the introduction of the management system of development of resource saving enterprise (RSE). The EPR management system is influenced by external and internal factors. One of the main factors of the external environment is the state regulation in the direction of resource saving, because a small number of business entities can turn to the development of resource-saving enterprises without state support. Defined the concept of "resource saving" as a complex positive effect on the state of the company, which combines the economic, social and environmental factors, the result of the implementation of resource conservation is economically viable for the company. The process of resource saving at the enterprise positively affects a wide range of subjects who perceive its results. According to international standards, Ukraine's economy is one of the most resource-intensive in the world through a large proportion of resource-intensive industries, outdated and inefficient technology, extreme depreciation of assets, inefficient systems of transformation and energy supply. World experience in the development and implementation of resource saving programs has a great variety of mechanisms and economic methods to ensure the efficiency of resource consumption in all areas of economic activity. The article highlights the most effective methods and applied to the realities of Ukraine. The study revealed the main problems of Ukrainian enterprises in the management of resource protection and development of resource protection. Today, finding ways of solving these problems and determining the main ways of stimulating enterprise teams and personnel management is especially important for the formation and implementation of an effective system of resource-saving development.

scholarly journals Which facial features are central in impression formation?

2020 ◽  
Author(s):  
Bastian Jaeger ◽  
Alex Lee Jones
Keyword(s):  
Machine Learning ◽  
Social Perception ◽  
Impression Formation ◽  
Emotional Expressions ◽  
Facial Features ◽  
Relative Importance ◽  
Height Ratio ◽  
Wide Range

Which facial characteristics do people rely on when forming personality impressions from faces? Previous research has uncovered an array of facial features that influence people’s impressions. Even though some (classes of) features, such as facial width-to-height ratio or resemblances to emotional expressions, play a central role in theories of social perception, their relative importance in impression formation remains unclear. Here, we model faces along a wide range of theoretically important dimensions. We use machine learning to test how well 31 features predict impressions of trustworthiness and dominance in a diverse set of 597 faces. In line with overgeneralization theory, emotion resemblances were most predictive of both traits. Other features that have received a lot of attention in the literature, such as facial width-to-height ratio, were relatively uninformative. Our results highlight the importance of modeling faces along a wide range of dimensions to elucidate their relative importance in impression formation.

scholarly journals Efficient and Innovative Polishing Processes for Smoothing Complex Surface Geometries and Internal Contours on Brittle-Hard Components

2020 ◽  
Vol 238 ◽  
pp. 03010
Author(s):  
Marcel Binder ◽  
Sebastian Henkel ◽  
Anne-Marie Schwager ◽  
Christoph Letsch ◽  
Jens Bliedtner ◽  
...  
Keyword(s):  
Current Trend ◽  
Glass Ceramics ◽  
Complex Surface ◽  
Fused Silica ◽  
Free Form ◽  
Resource Saving ◽  
Processing Technologies ◽  
Wide Range ◽  
Monolithic Components ◽  
Free Form Surfaces

The material fused silica, as well as other brittle-hard materials such as glass ceramics, have great potential for use in a wide range of applications due to their special material properties. The technical advantages of these materials require sophisticated processing technologies, including polishing steps, in order to be able to use these interesting materials advantageously. In addition, a current trend in modern optical manufacturing is the use of free-form surfaces and monolithic components that combine several optical and mechanical functions in one part. Novel or improved processes are needed in order to meet future requirements for resource-saving and effective production methods at the same time.

NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING

2021 ◽  
Keyword(s):  
Chemical Engineering ◽  
Energy Resource ◽  
National Academy Of Sciences ◽  
Resource Saving ◽  
Internal Markets ◽  
Wide Range ◽  
New Energy ◽  
Chemical Products ◽  
National Industry ◽  
Academy Of Sciences

The most important results of the scientific studies, carried out by the Institutes of the National Academy of sciences of Ukraine in the frames of the program for scientific research of the NAS of Ukraine "New Functional Substances and Materials for Chemical Engineering" in 2017-2021, are summarized. In the result of fulfillment of the projects of the Program a number of principally new organic, inorganic, polymeric substances and materials as well as composited based thereon of various functional destination were created, new energy-, resource-saving and ecologically-friendly ways for low-tonnage obtaining of substances and materials of chemical engineering were developed. Use of the obtained materials and methods of chemical substances obtaining in different fields of the national industry will improve the competitive capacity of the national products on the external and internal markets, will favor to significant reduction of the dependency of the country on import of deep technology chemical products, setting up of production of a wide range of chemical products, reagents and preparations in Ukraine.

Electroplating of Indium-Cadmium and Tin-Cadmium Alloy Coatings

2022 ◽  
Vol 1049 ◽  
pp. 124-129
Author(s):  
Sergey Yu. Kireev ◽  
Svetlana N. Kireeva ◽  
Anatoly Frolov ◽  
Alfiya Yangurazova ◽  
Konstantin Anopin
Keyword(s):  
Protective Coatings ◽  
Machine Building ◽  
Corrosion And Wear ◽  
Electric Resistance ◽  
Technological Parameters ◽  
Good Adhesion ◽  
Instrument Making ◽  
Building Products ◽  
Climatic Testing ◽  
Marine Climate

Technological parameters for electroplating cadmium alloy (Cd (24)-In and Cd (33)-Sn) coatings from low toxic solutions have been proposed. Since the fabricated alloy coatings possess low internal stress and microhardness, good adhesion property, high corrosion and wear resistance, they can be used as protective coatings for machine building products to enhance reliability and operability thereof. The presence of good solderability and low values of transient electric resistance in climatic testing favor these coatings to be applied in hetero-structured contact systems of instrument making products for increasing their reliability and operability in a tropical marine climate.

scholarly journals Resource-Saving Quality Management Systems of Coal Products Using the DSKA-4m Сomplexes

2018 ◽  
Vol 41 ◽  
pp. 01022
Author(s):  
Victor Atrushkevich ◽  
Nam Bui Juan ◽  
Artem Atrushkevich ◽  
Alberto Rodriguez
Keyword(s):  
Low Frequency ◽  
High Amplitude ◽  
Management Systems ◽  
Resource Saving ◽  
Quality Management Systems ◽  
Processing Technologies ◽  
Wide Range ◽  
Belt Conveyors ◽  
Coal Crushing

The article presents developed and widely implemented processing technologies of mining enterprises (crushing, classification, averaging adjustment screen composition, dehydration, loading, storage, reducing the ash content and moisture source)-based complexes DSKA. Offers innovative technical software allows mining companies and companies to create and consumers, in accordance with fluctuations in the market, to adjust flows of products providing a wide range of quality. Coal crushing and classification equipment is widely used in coal mines, sea and river ports, railway terminals and large coalstorage yards. However, drawbacks of the conventional technologies used in crushing (jaw, cone, rotary and rolling crushers), sizing (on low-frequency high-amplitude screens) and conveying (belt conveyors) worsen efficiency of production and decrease its attractiveness as investment. Besides, the preparation plants in service cannot, as a rule, ensure the integrated and adjustment-flexible approach to providing the desired quality of coal end product.

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