scholarly journals Investigation of the Operational and Technological Reliability of the Small-size Internal Threading Process

2022 ◽  
Author(s):  
A. Kharchenko
Keyword(s):  
Flexible Manufacturing ◽  
Transition Probabilities ◽  
Probability Of Failure ◽  
Technological Equipment ◽  
Systems Of Equations ◽  
Parametric Synthesis ◽  
Efficient System ◽  
Production Methods ◽  
Automated Production ◽  
Loading Device

Abstract. The article presents the results of research in the direction of improving technological equipment for internal threading of parts in a flexible automated production. Methods for assessing the operational and technological reliability of a flexible manufacturing module (FMM) of thread processing are considered, which can be used as the basis for the developed method of synthesis of its elements. It is proposed to consider the technological system of the flexible manufacturing module (FMM) of thread processing as a system in which transitions from state to state occur under the action of the simplest flows with parameters of the transition probabilities of a continuous Markov chain. The developed mathematical model describing the state of the FMM taking into account the failures of the functioning of its elements, parametric failures, as well as taking into account the recovery after these types of failures, makes it possible to reflect the influence on the operation of the module of the parameters of the flows of failures and restorations of the tool, machine tool, fixture, loading device. The solution of the obtained systems of equations of final probabilities allows for given (or experimentally obtained) intensities of failure streams (functioning and parametric) for FMM threading to obtain the values of the probability of failure-free operation, as well as the probabilities of finding the system in an inoperative state due to corresponding failures. The measures taken make it possible to solve the synthesis problem at the level of structural and layout optimization, so that at the stage of parametric synthesis to determine the elements that are vulnerable according to the developed criterion, the improvement of which will lead to the creation of the most efficient system.

ANALYSIS AND RESEARCH OF OPERATIONAL AND TECHNOLOGICAL RELIABILITY OF EQUIPMENT FOR INTERNAL SMALL–SIZED THREADING

2021 ◽  
Vol 3 ◽  
pp. 30-39
Author(s):  
A.O. KHARCHENKO ◽  
E.A. VLADETSKAYA
Keyword(s):  
Flexible Manufacturing ◽  
Transition Probabilities ◽  
Probability Of Failure ◽  
Technological Equipment ◽  
Systems Of Equations ◽  
Parametric Synthesis ◽  
Efficient System ◽  
Production Methods ◽  
Automated Production ◽  
Loading Device

The article presents the results of analysis and research in the direction of improving technological equipment for internal threading of parts in a flexible automated production. Methods for assessing the operational and technological reliability of a flexible manufacturing module (FMM) of thread processing are considered, which can be used as the basis for the developed method of synthesis of its elements. It is proposed to consider the technological system of the flexible manufacturing module (FMM) of thread processing as a system in which transitions from state to state occur under the action of the simplest flows with parameters of the transition probabilities of a continuous Markov chain. The developed mathematical model describing the state of the FMM taking into account the failures of the functioning of its elements, parametric failures, as well as taking into account the recovery after these types of failures, makes it possible to reflect the influence on the operation of the module of the parameters of the flows of failures and restorations of the tool, machine tool, fixture, loading device. The solution of the obtained systems of equations of final probabilities allows for given (or experimentally obtained) intensities of failure streams (functioning and parametric) for FMM threading to obtain the values of the probability of failure–free operation, as well as the probabilities of finding the system in an inoperative state due to corresponding failures. The measures taken make it possible to solve the synthesis problem at the level of structural and layout optimization, so that at the stage of parametric synthesis to determine the elements that are vulnerable according to the developed criterion, the improvement of which will lead to the creation of the most efficient system.

ANALYSIS AND RESEARCH OF ADJUSTABILITY OF EQUIPMENT FOR INTERNAL SMALL-SIZED THREADING

2021 ◽  
Vol 2 ◽  
pp. 93-99
Author(s):  
A.O. KHARCHENKO ◽  
A.A. KHARCHENKO
Keyword(s):  
Flexible Manufacturing ◽  
Computer Aided Design ◽  
Transition Probabilities ◽  
Objective Assessment ◽  
Complete Information ◽  
Operating Conditions ◽  
Theoretical Research ◽  
Automated Production ◽  
Processing Modes ◽  
Aided Design

The article presents the results of analysis and theoretical research in the direction of improving equipment for internal threading of parts in a flexible automated production. Methods for assessing the flexibility and readjustability of equipment are considered, which can be used as the basis for the developed methodology for the synthesis of technological elements of modules in conditions of computer-aided design. It is proposed to consider the technological system of the flexible manufacturing module (FMM) of threading, as a system in which transitions from state to state occur under the action of the simplest flows with the parameters of the transition probabilities of a continuous Markov chain. The developed mathematical model, which describes the states of a FMM, taking into account the readjustment of its technological elements, makes it possible to reflect the influence on the operation of the module of the parameters of applications for the changeover of processing modes, a tool, a power threading head, basic elements of a machine tool, a device, a loading device. The structure of the model and the labeled graph of the states of the system can be improved as the number of parameters and characteristics is refined. The solution of the resulting system of equations of final probabilities using the normalization condition allows for given (or experimentally obtained) intensities of arrival and service of changeover requests for FMM of threading, to obtain the values of the probability of non-changeover operation, as well as the probabilities of finding the system in an inoperative state due to the corresponding changeovers. For complete information and an objective assessment of the preferred option for use in FMS conditions, it is also necessary to take into account the stochastic processes occurring in the system under real operating conditions.

Comparative characteristics of provisional crowns made by CAD/CAM milling and 3D printing

2020 ◽  
pp. 45-49
Author(s):  
A.V. Stomatov ◽  
D.V. Stomatov ◽  
P.V. Ivanov ◽  
V.V. Marchenko ◽  
E.V. Piitsky ◽  
...  
Keyword(s):  
3D Printing ◽  
Good Alternative ◽  
Digital Model ◽  
Dental Practice ◽  
Production Methods ◽  
Automated Production ◽  
3D Printing Technology ◽  
Cad Cam ◽  
Milling Method ◽  
Technology Comparison

In this work, the authors studied and compared the two main methods used in dental practice for the automated production of orthopedic structures: the widely used CAD / CAM milling method and the 3D printing technology. As an object of research, temporary crowns were used, which were made on the basis of the same digital model: a) by the method of CAD / CAM milling from polymethylmethacrylate disks; b) by 3D printing from photopolymer resin based on LCD technology. Comparison of production methods and finished designs was carried out according to the following characteristics: strength, durability, aesthetic qualities, accuracy of orthopedic designs, etc. According to the results of the study, it was concluded that 3D printing can be a good alternative to CAD / CAM milling in solving problems of temporary prosthetics.

Improvement of efficiency of metal recycling in metallurgical production

2021 ◽  
pp. 45-51
Author(s):  
V. V. Maksarov ◽  
A. D. Khalimonenko ◽  
J. Olt
Keyword(s):  
Machine Building ◽  
Technological Equipment ◽  
Engineering Analysis ◽  
Automated Production ◽  
Optimal Geometry ◽  
Metal Recycling ◽  
Metal Chips ◽  
Physical Impact ◽  
Initial Processing ◽  
Building Enterprises

The article deals with the most effective primary utilization and subsequent processing of the main waste of machine-building enterprises-metal chips. To solve the above problems, the recycling of metal waste the most effective method is a comprehensive approach to the conditions of machine-building enterprises working in the conditions of the automated production consists of solutions to several problems, the main of which are submitted to the necessary properties of the chips produced and optimization of the technological equipment used for initial processing and subsequent briquetting of the chip. The solution of the problem of obtaining chips of the specified characteristics after the analysis of existing methods of its solution is proposed to be performed by applying the method of preliminary local physical impact on the surface of the workpiece. The proposed method makes it possible to obtain chips of such parameters that will meet the technical conditions of the type of automatic line for its processing and disposal, which is available in a particular production. The problem of optimization of the technological line of primary processing of chips is proposed to be solved on the basis of preliminary engineering analysis of chip crushing devices, which allows you to choose the optimal geometry of the cutter inserts depending on the type and material of the chips being crushed. The proposed set of measures should help machine-building enterprises to increase the profitability of production.

MODERN APPROACHES OF INDUSTRIAL ENTERPRISES TO USE FLEXIBLE PRODUCTION METHODS

2020 ◽  
Vol 4 (10) ◽  
pp. 32-36
Author(s):  
O. V. TITOVA ◽  
Keyword(s):  
Production System ◽  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Modern World ◽  
Flexible Production ◽  
New Production ◽  
Production Methods ◽  
Industrial Enterprises ◽  
Selection Of

The article shows that the success of a production system depends on the ability to effectively change its internal structure in connection with any change in demand or technology. Investing in a new production system as well as modifying an existing system requires informed decisions. Moreover, in a competitive envi-ronment, one of the key decisions that a manufacturing enterprise must make is the selection of appropriate manufacturing systems. The main feature of a flexible manufacturing system, which helps differentiate it from conventional manufacturing systems, is its ability to respond effectively to changes in product type through different flexibilities. Flexible manufacturing systems are well used in the manufacturing world as well as in all industries. Basic information about this technology is very important, because a flexible production system is involved in almost everything that is needed in the modern world.

scholarly journals Evaluation of the effectiveness of the forecasting system for special cases in flight based on the analysis of diagnostic data of the aircraft technological equipment

Connectivity ◽  
2020 ◽  
Vol 146 (4) ◽  
Author(s):  
I. O. Padalka ◽  
◽  
D. O. Parkhomenko ◽  
O. V. Shchenyakín ◽  
◽  
...  
Keyword(s):  
Expert Knowledge ◽  
Transition Probabilities ◽  
A Priori ◽  
Information Support ◽  
Main Task ◽  
Technological Equipment ◽  
Diagnostic Data ◽  
Production Models ◽  
Special Cases ◽  
Forecasting System

The paper proposes an approach to assessing the effectiveness of the forecasting system for special cases in flight based on the analysis of diagnostic data of the aircraft technological equipment. Prediction of special cases in flight is the main task of parametric diagnostics of aircraft technological equipment. To solve this problem, on-board automated monitoring, diagnostics and control of onboard equipment, unloading and information support of the crew make it possible to measure a large number of parameters of the aircraft technological equipment and obtain arrays of such information in digital form. It is proposed to process the received information using the method of predicting special cases in flight based on the identification of abnormal sequences in the diagnostic data of the aircraft technological equipment. To identify anomalous sequences, it is proposed to use a hybrid stochastic model based on the combination of Markov and production models that use temporal rules to refine the transition probabilities between process states. Due to the inclusion of refining production rules in the model, the probability of describing random processes that are not Markovian increases, and it also becomes possible to integrate a priori expert knowledge into the model, which is very important for predicting special cases in flight. It is proposed to evaluate the effectiveness of the forecasting system by two criteria: the efficiency and reliability of the decisions made by the aircraft crew. In the robot, a simulation was carried out on the simulator of a winding ship A-320 for evaluating the situation as well as taking decisions from the negative inheritance of particular types of problems in the country.

Researches Regarding the Usage of Titanium Alloys in Cranial Implants

2014 ◽  
Vol 657 ◽  
pp. 173-177 ◽  
Author(s):  
Carmen Cotigă ◽  
Octavian Bologa ◽  
Sever Gabriel Racz ◽  
Radu Eugen Breaz
Keyword(s):  
Human Body ◽  
Flexible Manufacturing ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Production Methods ◽  
Commercially Pure ◽  
Grade 5 ◽  
Cranial Implants ◽  
Cp Ti ◽  
New Procedures

In the last few decades, the concept of flexible manufacturing has started to gain more and more attention, as an adaptation of production methods to the increasingly varied demands by customers. Therefore, new procedures have been introduced as alternatives to the classical ones, a very promising one being incremental forming [. A possible application for this new procedure, targeted by the authors of this paper, is the manufacturing of custom-shaped prosthetic parts for use in various areas of human medicine. Such prostheses can have a functional role, when they target the replacing of a functional component of the human body, or an esthetic role, when they target the solving of problems related to the appearance of the human body. Among all titanium and its alloys, the mainly used materials in biomedical field are the commercially pure titanium (cp Ti, grade 2) and Ti6Al4V (grade 5) alloy [.

STRUCTURAL-LAYOUT SYNTHESIS OF MODULES SUBSYSTEMS FOR INTERNAL THREADING

2020 ◽  
Vol 4 (2) ◽  
pp. 85-94
Author(s):  
A.O. KHARCHENKO ◽  
A.A. KHARCHENKO
Keyword(s):  
Product Quality ◽  
Block Diagram ◽  
Economic Effect ◽  
Synthesis Problem ◽  
Technological Equipment ◽  
Automated Production ◽  
System A ◽  
Structural Layout ◽  
Urgent Task ◽  
Module System

The article presents the results of research in the direction of improving technological equipment for internal threading of parts in a flexible automated production. The creation of effective technological equipment for automated thread processing is an urgent task, the solution of which is associated with obtaining a significant economic effect by increasing processing productivity and improving product quality. An enlarged block diagram of the sequence of solving the synthesis problem, identifying "weak" places (elements and nodes that significantly reduce the reliability and readjustability of the system) and improving the elements of the equipment technological system is presented. After filling in the morphological matrix for the threading module system, a synthesis of its structure variants is performed. The measures taken allow us to solve the synthesis problem at the level of structural-layout optimization.

Automatization of the Cable-Routing-Process within the Automated Production of Wiring Systems

2017 ◽  
Vol 871 ◽  
pp. 186-192 ◽  
Author(s):  
Paul Heisler ◽  
Patrick Steinmetz ◽  
In Seong Yoo ◽  
Jörg Franke
Keyword(s):  
Early Years ◽  
Efficient Production ◽  
Production Methods ◽  
Wiring Harness ◽  
Automated Production ◽  
Passenger Vehicles ◽  
3D Printed ◽  
Cost Efficient ◽  
Production Cell ◽  
Wiring System

The wiring system is one of the most important and one of the most expensive part of modern passenger vehicles. It ́s production is done manually to nearly 100% since the early years of car manufacturing. Until today it wasn ́t possible to automatize these cost-intensive step of the car production in an effective and cost efficient way. This paper shows how the routing process of the wiring harness as a part of the whole production process can be automatized with easy and cost efficient production methods. Collaborative robots and 3D-printed prototypes of cable grippers were used to treat with the complexity of the job and to finally create a sustainable and cost efficient production system. Further the routing concept has been brought to a prototypical production cell which has been tested in various routing experiments at the institute’s laboratory. Finally, a discussion of the results brings up the strengths and weaknesses of the concept and shows possible solutions.

scholarly journals Increase the functionality of vibration feeders with electromagnetic vibration

2021 ◽  
Vol 23 (95) ◽  
pp. 33-37
Author(s):  
A. L. Bespalov ◽  
I. G. Svidrak ◽  
O. O. Boiko
Keyword(s):  
Economic Effect ◽  
Air Pressure ◽  
Compressed Air ◽  
Technological Equipment ◽  
Instrument Making ◽  
Automated Production ◽  
Minimal Improvement ◽  
And Performance ◽  
Loading Devices ◽  
Vibrating Feeders

Under modern conditions vibrating hopper feeders with electromagnetic drive are irreplaceable when it comes to production processes in mechanical engineering and instrument making optimization processes. They are used to download small, medium or miniature details to automated technological equipment, such as automatic machines, automatic lines and automated complexes, or any other flexible automated production. The vibrating hopper loading devices are most commonly used in transportation and loading of details on working positions of assembly automatic machines and assembly automated complexes. In this case the details must be issued in a clearly oriented state. For this purpose, the stationary automated orienting devices, or the orienting devices located directly on the working vibrating feeders` bodies are used. Low compressed air pressure is often used in these devices. Apart from this, in some cases the low compressed air pressure is used in vibrating feeders to increase the maximum lifting angle when vibrating transportation of details on a transport tray of the feeder. We already know the designs of vibrating feeders, whose transport tray is equipped with channels and openings for the supply of compressed air, whose jets affect the parts that are transported in order to increase the maximum possible lifting angle or the speed of parts transportation, as well as to ensure the guaranteed gap between them at the download position. We also know the vibrating feeders` constructions equipped with jet pneumatic devices, which are set exactly on the vibrating feeder hopper and serve for non-contact orientation of details that are issued. All of these devices use the low compressed air supplied by means of the flexible pipeline from a workshop pneumatic network. But the fact that such network is simply absent in many enterprises` workshops makes it impossible to use the vibrating feeders like these, this way decreasing their use. For expanding their use it is necessary to have vibrating feeders with individual low pressure compressed air source. Modern production manufactures new models of machines with high technical economic indicators, so functionality increase  of the existing one equipment and the development of new schemes of machines is an important task for designers and technological equipment manufacturers, because minimal improvement of its technological and performance can lead to a significant economic effect. The set of elements affecting the performance and efficiency of vibrating bunker feeders with electromagnetic drives that have a directional elastic system are presented in this paper. The additional structural elements increasing the functionality of such feeders are offered.

Sign in / Sign up

Export Citation Format

Share Document