scholarly journals Comparative analysis of metal-cutting equipment under production engineering

2013 ◽  
Vol 13 (03) ◽  
Author(s):  
Grigoriy Lazarenko
Keyword(s):  
Comparative Analysis ◽  
Metal Cutting ◽  
Production Engineering ◽  
Cutting Equipment

Assessment of the Adequacy of the Definition of Cutting Forces for the Purpose of Minimizing Energy Consumption in Machining Processes

2019 ◽  
Vol 945 ◽  
pp. 556-562
Author(s):  
A.G. Kondrashov ◽  
D.T. Safarov ◽  
R.R. Kazargeldinov
Keyword(s):  
Energy Consumption ◽  
Cutting Force ◽  
Cutting Forces ◽  
Metal Cutting ◽  
Electrical Power ◽  
Cutting Tools ◽  
Precise Determination ◽  
Machining Processes ◽  
Milling Operations ◽  
Cutting Equipment

Minimizing energy consumption in the processing of parts on metal-cutting equipment is most effective at the stage of designing the content of operations. Important in this process is the precise determination of the initial parameters - cutting forces. This parameter allows you to plan both energy consumption and perform additional calculations for the deformation of the tooling and workpiece in order to predict the geometric accuracy of the machined part. The article presents the results of experiments on measuring the circumferential cutting force during milling operations of an aluminum alloy workpiece with an end mill. The measurements were carried out by an indirect method - by recording the electrical power on the spindle and then calculating the circumferential cutting force. Theoretical analysis of the methods of calculation of cutting forces showed significant differences between the results obtained by domestic methods and recommendations of world manufacturers of cutting tools. Statistical analysis of the results of calculations based on reference data and measurements made it possible to assess the adequacy of the known methods for calculating cutting forces in order to minimize energy consumption in operations of processing parts on metal-cutting equipment

scholarly journals Technological prerequisites for the energy efficiency increase of the engine cylinder bore processing

2021 ◽  
Vol 279 ◽  
pp. 01001
Author(s):  
Lydmila Safarova ◽  
Andrey Malikov ◽  
Alexandr Yamnikov ◽  
Olga Yamnikova
Keyword(s):  
Metal Cutting ◽  
Engine Cylinder ◽  
Efficiency Increase ◽  
Cutting Equipment ◽  
Shaft Furnaces ◽  
Reduce Energy Consumption ◽  
Parameters Of Accuracy ◽  
Machining Operations ◽  
Cylinder Bore

An example of the rationalization of the current technology for manufacturing a cylinder of a small-sized diesel engine at PA “TULAMASHZAVOD” from a cast iron is given. It is shown that lowpower obsolete equipment leads to an increase in the number of technological operations and equipment used. However, even if all the generally accepted technological recommendations are followed, only 80% of the parts meet the requirements for the required parameters of accuracy and quality of the cylinder bore surface. Studies have found that the main reasons for insufficient quality are the presence of residual stresses in the casting, which cannot be removed during artificial aging, as well as insufficient accuracy and rigidity of metal cutting equipment at turning and boring operations. The use of more powerful and accurate modern equipment is theoretically and experimentally justified, which, due to increased refinement, allows reducing the number of machining operations. Replacement of artificial thermal aging by natural, combined with the replacement of shaft furnaces for heat treatment of workpieces with chamber furnaces of lower power and higher capacity, reduce energy consumption for the manufacturing by almost 4 times.

scholarly journals MATING SURFACES MACHINING IN CROSSED CHANNELS

2020 ◽  
Vol 2020 (3) ◽  
pp. 4-10
Author(s):  
Oleg Kirillov ◽  
Vladislav Smolencev ◽  
Evgeniy Kotukov
Keyword(s):  
Electric Field ◽  
High Speed ◽  
Metal Cutting ◽  
Working Environment ◽  
Mathematical Statistics ◽  
Work Piece ◽  
High Speed Machining ◽  
Mathematical Apparatus ◽  
Cutting Equipment ◽  
Selection Of

The purpose of the work is the application of a non-profiled electrode-brush for mating surfaces machining including that in crossed channels. To achieve the goal set there were problems under solution: the development of essential equipment, electrode-tools, the selection of working environment, the optimization of combined machining modes. To solve the problems set there are used basis regulations of the theory: electric and combined methods of machining, the mathematical apparatus of probability theories and mathematical statistics. In the paper the developed and manufactured plants and electrode-tools are shown. The recommended machining conditions, working environment are shown. The equipment is presented with a small-size plant for high-speed machining with an electrode-brush and a portable plant fixed on a drill rod that with the use of operating fluid recommended allows reducing considerably the terms and cost of metal cutting equipment updating for machining with electric field imposition. In the paper there are considered standard parts: nozzles, ejector bodies, parts of piping hydro-systems. The results of machining parts with crossed channels are shown. The application of processing by an electrode-brush with high circumferential velocities with regard to the work-piece from 35 m/sec and higher allows manufacturing products with the set values. The application of an electrode-brush is efficient for mating surfaces combined machining.

Influence of Structural Parameters of Cutting Ceramics on Quality of Processing of Machine Slideways of Metal-Cutting Equipment in Selective Formation of Instrumentation

2020 ◽  
Vol 854 ◽  
pp. 64-73
Author(s):  
Ilya V. Gorshkov ◽  
M.A. Popov
Keyword(s):  
Metal Cutting ◽  
Structural Parameters ◽  
Machining Process ◽  
Cutting Ceramics ◽  
Cutting Equipment ◽  
Priority Method ◽  
Increase Productivity ◽  
Carbide Ceramics ◽  
Selective Formation

Modern methods of machining of bed slideways with the required parameters of accuracy and quality of the processed surfaces are considered in order to increase productivity in the treatment of the surface of machine stands. To improve productivity, the finishing sanding operation has been replaced with finishing milling to ensure the required roughness, flatness and parallelism. The method of replacement of technological operations as exemplified by processing of a bed made of gray cast iron of grade “СЧ-20” is studied. The priority method of increasing the productivity of the processing of machine slideways of metal-cutting equipment, based on the use of cutting ceramics during the processing of the bed as a final technological operation, is determined. Based on the microstructural characteristics of oxide-carbide cutting ceramics, a uniform method of equipping cutters with cutting inserts with equal lifespan is used to increase productivity and achieve the required surface finish. This method of the milling cutter layout allows for longer life and provides the required margin of tool accuracy as well as allows predicting premature wear of the cutting tool. The results of the work are the identification of the patterns of influence of structural parameters of cutting ceramics on the quality of machine slideways of metal-cutting equipment in the selective formation of instrumentation. Studies have shown that the quality of machining depends on the microstructure characteristics of each insert used in the machining process when using interchangeable multi-sided oxide carbide ceramic inserts. The increase in productivity and quality of machining is achieved by monitoring the microstructure of the cutting oxide-carbide ceramics.

Metal Cutting Analysis: Introduction to a New Theoretical Approach

1967 ◽  
Vol 89 (3) ◽  
pp. 543-548
Author(s):  
Jessen Vidal
Keyword(s):  
Comparative Analysis ◽  
Theoretical Approach ◽  
Metal Cutting ◽  
Cutting Mechanism ◽  
Empirical Parameter ◽  
New Approach

In this work, the author develops a new approach to the theory of the cutting mechanism based on the comparative analysis of classical theories. He suggests the introduction of an empirical parameter E, related to the efficiency, which modifies the Lee-Shaffer solution; at E = 1, the theory reduces to the latter theory.

Review of Materials Processing Literature 1971–72—Part 1: Material Removal Practice

1976 ◽  
Vol 98 (1) ◽  
pp. 1-11
Author(s):  
G. Boothroyd
Keyword(s):  
Material Removal ◽  
Metal Cutting ◽  
Materials Processing ◽  
German Language ◽  
Production Engineering ◽  
Plastic Working ◽  
Research And Practice ◽  
University Of Massachusetts ◽  
Technological University ◽  
Language Literature

In this set of papers, the ASME Production Engineering Division presents results of its continuing efforts to provide a condensed survey of significant contributions to the understanding of materials processing, as they appear in literature. This work is intended to be of use to engineers engaged in research and practice alike. Two new contributors are welcomed to this effort: Professor G. Boothroyd, University of Massachusetts, who has agreed to take over the review of Material Removal Practice, and Professor C. H. Kahng, Michigan Technological University, who will review the literature published in the Japanese language starting with this series. Reviews of Grinding and the German Language Literature complete the set of papers presented here. The reviews of Plastic Working of Metals and Metal Cutting Analysis will appear at a later date.

scholarly journals CONSTRUCTION OF A REGRESSION MODEL OF THERMAL RESISTANCE OF A CONTACT PSEUDO MEDIUM

2021 ◽  
Vol 23 (3) ◽  
pp. 47-54
Author(s):  
A.F. Denisenko ◽  
◽  
L.Yu. Girth ◽  
Keyword(s):  
Thermal Resistance ◽  
Regression Model ◽  
Metal Cutting ◽  
Operating Experience ◽  
Design Stage ◽  
Contact Thermal Resistance ◽  
Limit Values ◽  
Cutting Equipment ◽  
Processing Accuracy ◽  
The Difference

The operating experience of metal-cutting machines made it possible to develop reasonable recommendations for the permissible limit values of temperature for the main subsystems of the machine, which determine the accuracy of processing. However, the decrease in the seriality of the manufactured metal-cutting equipment and the constant improvement of its designs require the development of models that are the basis of engineering techniques that allow at the design stage to predict the thermal picture of the main machine units that affect the processing accuracy. In connection with a significant number of factors influencing the formation of contact thermal resistance, and the difference in the weight of their action, it is proposed to use a pseudolayer (pseudo-medium), consisting of areas of actual contact and cavities filled with air or oil, for their comprehensive consideration in the thermal model of joining parts. To determine the significant factors that dominate the contact thermal resistance, a number of one-factor experiments were carried out. To develop a regression model of temperature change in the contact zone, a PFE of type 24 was performed. The results obtained were verified by the Cochran, Student and Fisher criteria.

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