scholarly journals Investigating the thermal work and construction of annular furnace on “Chelyabinsk pipe-rolling plant” PJSC to improve heat technical indicators of its work

2019 ◽  
Vol 62 (6) ◽  
pp. 431-437
Author(s):  
N. V. Shchukina ◽  
N. A. Cheremiskina ◽  
N. B. Loshkarev ◽  
V. V. Lavrov
Keyword(s):  
Pipe Rolling ◽  
Technical Indicators ◽  
Thermal Work ◽  
Rolling Plant ◽  
Annular Furnace

Study on Thermal Operation and Design of Ring Furnace of the Pipe Rolling Plant

2019 ◽  
Vol 946 ◽  
pp. 468-473
Author(s):  
Natalia Shchukina ◽  
Nikolay Loshkarev ◽  
Vladislav Lavrov
Keyword(s):  
Fuel Consumption ◽  
Thermal Performance ◽  
Heat Balance ◽  
Rolling Stock ◽  
Pipe Rolling ◽  
High Productivity ◽  
Heating Furnaces ◽  
Brick Lining ◽  
Rolling Plant ◽  
Ring Furnace

High productivity of rolling and pipe rolling mills, good quality of finished metal products is possible to provide in the presence of powerful heating furnaces, well heating the metal with minimal oxidation and decarburization. Such conditions are provided by ring furnaces which are widely used for heating the preparations at rolling of pipes, wheels and bands of the railway rolling stock. The purpose of the heat – receiving structure of the metal, providing a set of physical and working properties, or impart to these materials the ductility required for subsequent machining. The article deals with the design and thermal performance of the ring furnace operating at ChelPipe’s Pipe Rolling Plant No.2. The problems arising during the operation of the thermal unit are analyzed. The paper describes the calculation of heating of metal and heat balance of the ring furnace. In the course of the analysis of the results of design studies, the shortcomings of the existing heat recovery system are revealed and measures for the reconstruction of the furnace to reduce fuel consumption and increase productivity (replacement of the existing brick lining with fibrous, the use of regenerative burners, the use of non-water-cooled partitions, etc.) are proposed. The paper analyzes the design and thermal performance of the ring furnace for heating of pipe billets before rolling. It shows a heat balance of the ring heating furnace and provides measures for furnace reconstruction aimed at reduction in fuel consumption and increase in efficiency: replacement of the existing lining with fiber lining, use of regenerative burners, application of non-water cooled walls.

scholarly journals RESEARCH OF THE DEFORMATION ZONE ON STEPWISE MOLDING PRESS IN CONDITIONS OF JSC “CHEREPOVETS PIPE-ROLLING PLANT”

2015 ◽  
Vol 57 (3) ◽  
pp. 49
Author(s):  
S. V. Samusev ◽  
A. V. Ljuskin ◽  
A. I. Romancov ◽  
K. L. Zhigunov ◽  
A. N. Fortunatov
Keyword(s):  
Deformation Zone ◽  
Pipe Rolling ◽  
Rolling Plant

The Calculating Method of Thinning Pipes Ends before Rolling in the Reduction Mill

2020 ◽  
Vol 299 ◽  
pp. 693-698 ◽  
Author(s):  
Grigorii A. Orlov ◽  
A.G. Orlov
Keyword(s):  
Computer Simulation ◽  
Distinctive Feature ◽  
Continuous Mill ◽  
Pipe Rolling ◽  
Calculating Method ◽  
Reduction Mill ◽  
Rolling Plant ◽  
Simulation Results

In this article it is discussed one of the main directions of improving the rolling tubes technology on a pipe-rolling plant with a continuous mill, in order to reduce the pipe-ends cut. A method for preliminary end sections thinning modes, calculating during rolling on a continuous mill, to compensate for wall subsequent thickening in the reduction mill, has been developed. Method distinctive feature is the calculation of end thickening volume, which must be reduced by a specified quantity when end sections rolled. The sequence of technological calculations is given. The results of pipe reduction computer simulation by regular rolling modes, and modes calculated by the proposed method, are represented The analysis of the simulation results showed the possibility of thickened ends length reducing of at least 10%.

scholarly journals The dynamics of the centreing mechanism of piercing mill mandrel of the pipe-rolling plant

2020 ◽  
Vol 7 (1) ◽  
pp. 51-63
Author(s):  
S.R. Rakhmanov ◽  
◽  
Yu.G. Gulyaev ◽  
S.V. Zdanevich ◽  
◽  
...  
Keyword(s):  
Mechanical System ◽  
Dynamic Model ◽  
Thickness Measurement ◽  
Piercing Mill ◽  
Pipe Rolling ◽  
Starting Point ◽  
Rod System ◽  
Rolling Plant ◽  
Steel 20 ◽  
Mill Mandrel

The paper presents the results of the vibrodiagnostics of a centering machine mechanism for holding piercing mill mandrel N1 of the pipe-rolling plant (PRP) 350. In the paper, it is established that vibration acceleration of a bearing roller lever of the centering machine mechanism for holding piercing mill mandrel during milling of an Æ282х50 mm shell, steel 20 reaches 5…12 m/s2, and of the upper roller’s vibration frequency is 33.3 Hz. The paper presents the results of the thickness measuring of the Æ282х50 shell, steel 20 after using the piercing mill N1 350. The results shows the distinctive influence of the dynamics of the milling holding mechanism rod. The system is put forth for calculating the energy-power parameters during the realization of the technical process for making shells of the required specifications in a piercing mill. The paper establishes the value of the milling axial resistance to the flow of the milled metal (taking the calibration values into account). The paper presents a refined system for making a dynamic model for the piercing bill milling holding mechanism rod with the milling calibration parameters taken fully included. A differential equation for the milling rod movement is made, specifically for the dynamic model of the PRP piercing mill mechanical system. The dynamic values of the mechanical system are refined, which is used as a starting point for solving the tasks dealing with the analysis of the PRP piercing mill milling rod’s vibroactivity state. In order to decrease rod vibroactivity levels, the paper recommends choosing rational milling calibration and to set the shell milling modes using mechanical system dynamics modelling during the corresponding stages of the design of technological processes. The paper pro-poses a scheme for modernization of the PRP 350 piercing bill exit side by switching the centering machine rod system holding bridges gear to proportional hydraulics. Keywords: piercing mill, vibration diagnostics, thickness measurement, piercing, sleeve; difference in wall thickness, energy-power parameters, calibration, mandrel, vibroactivity, dynamics, mandrel retention mechanism.

C. Liebknecht Nizhnedneprovsk pipe-rolling plant completes 75 years

Metallurgist ◽  
1971 ◽  
Vol 15 (7) ◽  
pp. 429-431
Author(s):  
A. T. Esaulov
Keyword(s):  
Pipe Rolling ◽  
Rolling Plant

Technical and economic analysis of certain types of service robots

2020 ◽  
Vol 19 (10) ◽  
pp. 1965-1986
Author(s):  
T.A. Komkina ◽  
M.A. Nikonova ◽  
M.G. Dubinina
Keyword(s):  
Dynamic Models ◽  
Unit Price ◽  
Service Robots ◽  
Technical Level ◽  
Positive Correlation ◽  
Technical Indicators ◽  
Technical Parameters ◽  
Prosthetic Hands ◽  
Remotely Piloted Aircraft ◽  
Aircraft System

Subject. The article analyzes development trends in certain types of service robots, namely, hybrid UAVs, bionic prosthetic hands, robotic vacuum cleaners. Objectives. We focus on identifying the main trends in the development of certain types of service robots, building dynamic models of their technical indicators and models of dependence of their price and weight on absolute characteristics and technical parameters. Methods. The study employs methods of correlation and multiple regression analysis. The data of the IFR, the Remotely Piloted Aircraft System, and websites of robot manufacturers serve as the informational basis of the paper. Results. The modeling unveils positive correlation between the integrated indicator of the technical level of hybrid UAVs of convertiplane type and the wingspan. The analysis of modern bionic prosthetic hands shows that the developers focus on optimizing the structure of the prosthetic, however, as the functions of the hand improve, the weight of bionic hand increases. The main factors influencing the price of robot vacuum cleaners are their power, weight, and operating hours. Conclusions. The unit price of a complex indicator of the technical level of hybrid UAVs is lower than the corresponding indicator of fixed-wing UAVs, reflecting a greater efficiency of hybrid UAVs. The analysis of technical indicators of robotic prosthetics (using the case of bionic hands) shows that any improvement of functional characteristics leads to deterioration of weight. The analysis of technical and economic indicators of robotic vacuum cleaners reveals a positive correlation between the price and weight, operating hours and power.

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