scholarly journals TECHNOLOGICAL FEATURES OF MANUFACTURING COMPLEX PARTS OF THE MECHANICAL PART OF OPTICAL DEVICES AT MACHINING CENTERS

2021 ◽  
Vol 6 ◽  
pp. 46-51
Author(s):  
Nikolay E. Gavrichenko
Keyword(s):  
Metal Cutting ◽  
Optical Devices ◽  
Mechanical Part ◽  
Machining Center ◽  
Theoretical Significance ◽  
Cutting Equipment ◽  
Assembly Technology ◽  
Modern Manufacturing ◽  
Metal Products ◽  
Complex Parts

The article defines the concept of "technological features". Examples of technological features of modern manufacturing by cutting complex parts of the mechanical part of optical devices are considered and analyzed. The examples contain fragments of manufacturing parts only on CNC machines of the "machining center" type. This type of metal-cutting equipment is accepted as the main one in the conditions of automation of processing by cutting metal products. The necessity of systematization of the features of manufacturing products in optical and assembly technology is stated. Attention is drawn to the practical and theoretical significance of this work.

scholarly journals ANALYSIS AND CLASSIFICATION OF MANUFACTURING CENTERS FOCUSED ON MECHANICAL PART OF OPTICAL DEVICES

2020 ◽  
Vol 6 (1) ◽  
pp. 91-98
Author(s):  
Nikolay E. Gavrichenko ◽  
Pavel V. Petrov
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Optical Devices ◽  
Comprehensive Analysis ◽  
Structural Elements ◽  
Metal Parts ◽  
Complex Metal ◽  
Mechanical Part ◽  
Formalized Description

The article deals with the concept of flexible and dynamic classification of metal-cutting machines of the "turning processing center" (TPC) type for the production of complex metal parts of optical devices by cutting. It is intended to create specialized databases with a formalized description of the structural elements of the TPC and automatically perform multiple classifications, relying on various factors. The comprehensive analysis of machine-tool companies is made; the generalized structure of structural elements and parameters of modern TPC is defined.

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

Optimization of Cutting Conditions for Surface Roughness in VMC 5-Axis

2019 ◽  
Vol 969 ◽  
pp. 631-636 ◽  
Author(s):  
Ramesh Rudrapati ◽  
Arun Patil
Keyword(s):  
Surface Roughness ◽  
Response Surface ◽  
Metal Cutting ◽  
Advanced Materials ◽  
Milling Parameters ◽  
Machining Center ◽  
Machining Economics ◽  
Parameters Selection ◽  
Quality Response ◽  
Five Axis

Vertical machining center (VMC) five-axis is advanced metal cutting process which used tomachine advanced materials for creating parts for industries like die, automotive, aerospace, machinerydesign, etc. Input parameters selection very important in VMC-five axis to obtain better surface finishon milled part and enhanced machining economics. In the present work, experimental analysis has beenplanned to study the significances of milling parameters on quality response, surface roughness (Ra) ofD3 steel. The experiments have been planned on D3 steel in VMC five axis as per Box-Behnken designof response surface methodology (RSM). Modeling and optimization have been done by hybrid RSMand Jaya optimization algorithm. The factor effects on Ra has been studied by analysis of signal-tonoise ratio. The concluding remarks has been drawn from the study

Cutter Optimal Selection of CAPP System Facing to the Modern Manufacture

2006 ◽  
Vol 532-533 ◽  
pp. 729-732
Author(s):  
Lan Li ◽  
En Fu Liu ◽  
Qing Su Jin
Keyword(s):  
Manufacturing Industry ◽  
Metal Cutting ◽  
Cutting Process ◽  
Machining Process ◽  
Optimal Selection ◽  
Important Method ◽  
Modern Manufacturing ◽  
Fuzzy Assessment ◽  
Resource And Environment ◽  
Selection Of

The modern manufacturing industry requires the cutting process to reduce the quantity of pollutants, to ensure the product quality, to make good use of the resource and energy, and to satisfy the need of productivity and economy at the same time. The cutter reasonable selection is one important method of improving cutting capability. Therefore, it can solve efficiently the new problem in machining process to think of synthetic effect with quality, economy, resource and environment at the same time. Furthermore, because the process in metal cutting is variable and the influence of most factors can not be confirmed, the fuzzy assessment based on fuzzy integrate can select more justified cutter in cutting process.

scholarly journals Reliability Assessment of CNC Machining Center Based on Weibull Neural Network

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Zhaojun Yang ◽  
Chao Chen ◽  
Jili Wang ◽  
Guofa Li
Keyword(s):  
Neural Network ◽  
Manufacturing Industry ◽  
Reliability Assessment ◽  
Cnc Machining ◽  
Reliability Engineering ◽  
Machining Center ◽  
The Hierarchical Structure ◽  
Life Distributions ◽  
Modern Manufacturing ◽  
Hidden Layer

CNC machining centers, as the key device in modern manufacturing industry, are complicated electrohydraulic products. The reliability is the most important index of CNC machining centers. However, simple life distributions hardly reflect the true law of complex system reliability with many kinds of failure mechanisms. Due to Weibull model’s versatility and relative simplicity and artificial neural networks’ (ANNs) high capability of approximating, they are widely used in reliability engineering and elsewhere. Considering the advantages of these two models, this paper defined a novel model: Weibull neural network (WNN). WNN inherits the hierarchical structure from ANNs which include three layers, namely, input layer, hidden layer, and output layer. Based on more than 3000 h field test data of CNC machining centers, WNN has been successfully applied in comprehensive operation data analysis. The results show that WNN has good approximation ability and generalization performance in reliability assessment of CNC machining centers.

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.

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