scholarly journals The use of tool materials for monitoring the state of cutting technological systems

2021 ◽  
Vol 25 (1) ◽  
pp. 17-30
Author(s):  
В. Ya. Mokritskiy ◽  
V. Yu. Shelkovnikov
Keyword(s):  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
The State ◽  
Technological System ◽  
Dynamic State ◽  
Technological Systems ◽  
Software Environment ◽  
Life Period ◽  
Cutting Zone

 The aim was to develop a methodology for monitoring the dynamic state of the links “machine tool – device – cutting tool – detail” comprising a cutting technological system as applied to turning specialized stainless steels using replaceable standard hardmetal inserts. The research object was the hard-to-treat non-corrosive stainless steels 09Х17Н7Ю, 12Х18Н10Т and 13Х15Н5 АМ-3. Monitoring was carried out by simulating plate coatings in the Deform software environment. The diagnostic criterion was the tool life period up to the wear level of 0.5 mm along the rear edge. The effect of coatings on the tool life period was assessed according to the following parameters: temperature in the cutting zone, tension in the tool material and tool deformation. As a result, 10 optimal coatings having the greatest impact on the state of the cutting technological system under study were selected. These coatings can be used for diagnosing the state of cutting technological systems. The coatings were distinguished in terms of architecture (design, composition,structure and coating method). A technique for monitoring and managing the state of cutting technological systems according to the results of diagnostics was proposed. The deviation of the revealed state of the cutting technological system from the desired state was estimated by the life period of tools with different coatings for the same time of their operation. The state of the system under study was considered effective provided that the maximum tool life period due to the use of an optimal coating was achieved. A technique allowing assessment of the state of technological cutting systems by their simulation according to the parameters “temperature in the cutting zone”, “tension in the tool material” and “tool deformation” was proposed. This technique also permits monitoring of the state of cutting systems by the parameter "tool life period" and managing their state according to the results of diagnostics through the use of the most optimal plate coatings. The developed technique can be used to reveal the optimal parameters of the cutting mode of hard-to-treat specialized corrosion-resistant steels.  

Hardening coatings of tool materials for turning of stainless steels

2021 ◽  
pp. 7-10
Author(s):  
B.Ya. Mokritsky
Keyword(s):  
Experimental Data ◽  
Computer Simulation ◽  
Tool Wear ◽  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
Software Environment ◽  
Tool Materials ◽  
Hardening Coatings ◽  
Cutting Zone

The results of new tool materials designing for processing of stainless steels are presented, which allowed to increase the tool life up to 3 times. The studies are carried out with the integrated use of experimental data and computer simulation in the Deform software environment. The criteria by which modeling is feasible at sufficient level are identified: tool wear, temperature in the cutting zone, stresses in the tool material and tool material deformation.

Analysis of interconnections between technical systems on hierarchically connected technological levels of steel sheet production by hot rolling

2020 ◽  
Vol 76 (8) ◽  
pp. 847-855
Author(s):  
E. N. Shiryaeva ◽  
M. A. Polyakov ◽  
D. V. Terent'ev
Keyword(s):  
Hot Rolling ◽  
Systems Analysis ◽  
Rolling Mill ◽  
Steel Sheet ◽  
Technological System ◽  
Necessary Condition ◽  
Rolled Sheet ◽  
Technological Systems ◽  
Hot Rolling Mill ◽  
Technical Systems

Complexity of modern metallurgical plants, presence of great number of horizontal and vertical interactions between their various structural subdivisions makes it necessary to apply a systems analysis to elaborate effective measures for stable development of a plant operation. Among such measures, digitalization of a plant is widespread at present. To implement the digitalization it is necessary to have clear vision about links at all the levels of the technological system of a plant. A terminology quoted, accepted in the existing regulatory documents for defining of conceptions, comprising the technological system. It was shown, that the following four hierarchical levels of technological systems are distinguished: technological systems of operations, technological systems of processes, technological systems of production subdivisions and technological systems of plants. A hierarchical scheme of technological systems of hot-rolled sheet production at an integrated steel plant presented. Existing horizontal and vertical links between the basic plant’s shops shown. Peculiarities of flows of material, energy and information at the operation “rolling” of the technological system “hot rolling of a steel sheet” considered. As a technical system of the technological process of the hot rolling, the hot rolling mill was chosen. A structural diagram of the hot rolling mill was elaborated, the mill being consisted of reheating furnaces, roughing and finishing stand groups, with an intermediate roll-table between them, and down-coilers section. Since the rolling stands are the basic structural elements of the hot rolling mill, structural diagrams of a roughing and a finishing stands were elaborated. Results of the systems analysis of the technological and technical systems, hierarchically linked in the process of steel sheet hot rolling, can be applied for perfection of organization structure of the whole plant, as well as for elaboration mathematical models of a system separate elements functioning, which is a necessary condition for a plant digitalization.

PROJECT 70/PROJECT 7000 STAINLESS TYPE 303

Alloy Digest ◽  
1997 ◽  
Vol 46 (6) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Tool Life ◽  
Stainless Steels ◽  
Heat Treating ◽  
Machining Time ◽  
Type Machine

Abstract Project 70 stainless type 303 and Project 7000 stainless type 303 are free-machining stainless steels of the austenitic chromium-nickel type. They offer significantly improved machinability and longer tool life. These steels are suited particularly for automatic bar-machine and Swiss-type machine operations where longer tool life results in more productive machining time. Applications include shafts, valve bodies, valves, valve trim, and fittings. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-409. Producer or source: Carpenter. Originally published June 1982, revised June 1997.

Evaluation of Cooling Potential and Tool Life in Turning Using Metalworking Fluids Delivered in Supercritical Carbon Dioxide

2009 ◽  
Author(s):  
Andres F. Clarens ◽  
Ye-Eun Park ◽  
Jacob Temme ◽  
Kim Hayes ◽  
Fu Zhao ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Tool Wear ◽  
Tool Life ◽  
Heat Removal ◽  
Minimum Quantity Lubrication ◽  
Metalworking Fluids ◽  
Compacted Graphite ◽  
Lower Viscosity ◽  
Cutting Zone ◽  
Machining Operations

Carbon Dioxide is an industrial byproduct that has been proposed as an alternative metalworking fluid (MWF) carrier with lower environmental impacts and better cooling potential than existing MWFs. This paper investigates the heat removal and tool life effects of rapidly expanding supercritical CO2 (scCO2)-based MWFs relative to MWFs delivered as a flood of semi-synthetic emulsion or as minimum quantity lubrication (MQL) sprays. When cutting both compacted graphite iron (CGI) and titanium, tool wear was most effectively controlled using the scCO2-based MWF compared with the other MWFs. Analysis in this paper suggests that the performance benefit imparted by rapidly expanding scCO2 appears to be related to both the cooling potential and penetration of the sprays into the cutting zone. High-pressure gas sprays have lower viscosity and higher velocity than conventional MWFs. An experiment in which the spray direction was varied clearly demonstrated the importance of spray penetration in tool wear suppression. The type of gas spray is also a significant factor in tool wear suppression. For instance, a spray of N2 delivered under similar conditions to CO2 effectively reduced tool wear relative to water based fluids, but not as much as CO2. This result is particularly relevant for MQL sprays which are shown to not cool nearly as effectively as scCO2 MWFs. These results inform development of scCO2-based MWFs in other machining operations, and provide insight into the optimization of scCO2 MWF delivery.

Model for Optimization of the Tool Life and the Cutting Speed for Maximum Productivity at Drilling of the Steel 2NiCr185

2015 ◽  
Vol 760 ◽  
pp. 433-438 ◽  
Author(s):  
Ovidiu Blăjină ◽  
Aurelian Vlase ◽  
Marius Iacob
Keyword(s):  
Mathematical Model ◽  
Stainless Steel ◽  
Tool Life ◽  
Stainless Steels ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Research Directions ◽  
Maximum Productivity ◽  
Optimum Cutting ◽  
New Research

The research in the last decade regarding their cutting machinability have highlighted the insufficiency of the data for establishing of the optimum cutting processing conditions and the optimum cutting regime. The purpose of this paper is the optimization of the tool life and the cutting speed at the drilling of the stainless steels in terms of the maximum productivity. A nonlinear programming mathematical model to maximize the productivity at the drilling of a stainless steel is developed in this paper. The optimum cutting tool life and the associated cutting tool speed are obtained by solving the proposed mathematical model. The use of this productivity model allows greater accuracy in the prediction of the productivity for the drilling of a certain stainless steel and getting the optimum tool life and the optimum cutting speed for the maximum productivity. The obtained results can be used in production activity, in order to increase the productivity of the stainless steels machining. Finally the paper suggests new research directions for the specialists interested in this field.

Optimum Tool Life and Cutting Speed for the Maximum Productivity at the Drilling of the Steel X6CrNiTi18-10

2013 ◽  
Vol 837 ◽  
pp. 28-32
Author(s):  
Ovidiu Blăjină ◽  
Aurelian Vlase ◽  
Vlad Darie
Keyword(s):  
Stainless Steel ◽  
Tool Life ◽  
Stainless Steels ◽  
Cutting Tool ◽  
Programming Model ◽  
Cutting Speed ◽  
Maximum Productivity ◽  
Optimum Cutting ◽  
Nonlinear Programming Model ◽  
New Research

The research in the last decade regarding their cutting machinability have highlighted the insufficiency of the data for establishing of the optimum cutting processing conditions and the optimum cutting regime. The purpose of this paper is the optimization of the tool life and the cutting speed at the drilling of the stainless steels in terms of the maximum productivity. A nonlinear programming model to maximize the productivity at the drilling of a stainless steel is developed in this paper. The optimum cutting tool life and the associated cutting tool speed are obtained by solving the proposed mathematical model. The use of this productivity model allows greater accuracy in the prediction of the productivity for the drilling of a certain stainless steel and getting the optimum tool life and the optimum cutting speed for the maximum productivity. The obtained results can be used in production activity, in order to increase the productivity of the stainless steels machining. Finally the paper suggests new research directions for the specialists interested in this field.

scholarly journals Sports utility semiotics: A semantic differential study of symbolic potential in automobile design

Semiotica ◽  
2015 ◽  
Vol 2015 (207) ◽  
pp. 1-29 ◽  
Author(s):  
Andrew Wilson ◽  
Małgorzata Haładewicz-Grzelak
Keyword(s):  
Statistical Analysis ◽  
Semantic Differential ◽  
Semantic Space ◽  
Symbolic Capital ◽  
Technological System ◽  
Technological Systems ◽  
Automobile Design ◽  
Affective Attitudes ◽  
Social Prestige ◽  
Two Factors

AbstractThe article aims to illuminate the issue of symbolic potential in postmodern society through a semiotic study of car design. In Baudrillard’s terminology, we explore the experience and sociological and psychological materiality of objects that, being above objects’ perceptible materiality, constantly modify the integrity of technological systems (Baudrillard 2005 [1968]: 6). The target concepts are analyzed through Baudrillard’s lens of symbolic capital and his technological system of objects, coupled with the method of semantic differential (SD; e.g., Osgood 1979, 1981) against the insights of Tartu semiotics. Such a complex framework helps to establish affective attitudes of the subjects towards scales selected for their perceptual saliency. The analysis is based on the responses of students in a Polish university who were administered an instrument comprising 14 concepts and 37 scales. The results of statistical analysis yield a semantic space with two factors: potency and activity/dynamism, which we shall call social prestige. At this stage of the analysis we could not determine the evaluation factor. The scales that loaded significantly showed that there is indeed an increment of perceptual saliency in both extracted factors in the case of target stimuli (pickups and SUVs).

Tool Materials for Turning Specialized Stainless Steels

2021 ◽  
pp. 3-8
Author(s):  
B.Y. Mokritskiy ◽  
E.S. Sitamov
Keyword(s):  
Hard Alloy ◽  
Stainless Steels ◽  
Tool Material ◽  
Simulation Studies ◽  
Operational Parameters ◽  
Tool Materials ◽  
Coating Method ◽  
Composition Structure ◽  
Good Agreement ◽  
Tool Durability

The article considers the issues of increasing the tool durability when turning specialized hard-to-work corrosion-resistant stainless steels 09Kh17N7Yu, 12Kh18N10T and 13Kh15N5AM3 with standard replaceable carbide tip. To develop recommendations for reducing tool consumption, a number of experimental and simulation studies was performed. The simulation was performed in the Deform software for three parameters: temperature, stress, and strain. The simulation results are compared with the operational parameters (wear of the tool material). Simulation was performed for ten different coatings on a hard-alloy substrate of the VK8 brand. The tool hard alloy VK8 is used as the base tool material, the other tool materials differ in the architecture (design, composition, structure and coating method) of the coatings applied to the VK8 substrate. The techniques of selecting the most rational tool materials are developed. The results obtained by simulation are verified experimentally. A good agreement between the results of simulation and experimental research has been achieved.

scholarly journals Construction supervision at the facilities renovation

2019 ◽  
Vol 91 ◽  
pp. 08044 ◽  
Author(s):  
Azariy Lapidus ◽  
Dmitry Topchiy
Keyword(s):  
Systematic Approach ◽  
The State ◽  
Control Measures ◽  
Technological System ◽  
Deterministic System ◽  
Industrial Facilities ◽  
Quantitative Characteristics ◽  
State Construction ◽  
Construction Supervision

Article justify the need for a systematic approach to the formation of uniform requirements for the volume and level of construction supervision carried out in the conversion of industrial facilities. Author determines the factors that affect the safety, is the quantitative characteristics of various types of control measures carried out by specialists of state construction supervision both at the facility and in the office. As a hypothesis, author considers the possibility of forming a single deterministic system that provides objective supervision during the conversion and does not create an excessive burden for both the state and the developer. As a result, the existing legislation in the field of state construction supervision is incomplete and partly contradictory. In this article the necessity of formation of scientifically grounded hierarchical organizational and technological system of construction supervision is defined.

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