scholarly journals Formalization of requirements for assembly of high-precision units during process design of production of multi-product machining systems

2021 ◽  
Vol 2131 (2) ◽  
pp. 022031
Author(s):  
A Nazaryev ◽  
P Bochkarev ◽  
G Gumarov
Keyword(s):  
Dimensional Analysis ◽  
High Precision ◽  
Process Design ◽  
Production Systems ◽  
Design Procedures ◽  
The Future ◽  
Assembly Unit ◽  
Manufacturing Methods

Abstract This article considers the improvement of mathematical and methodological support of the implementation of an enlarged block of design procedures of the analysis of requirements of the assembly of high-precision products of the complex of design procedures of the system of accounting requirements for the assembly in the design of manufacturing methods of machining. The proposed modernization will allow to more efficiently perform of the design dimensional analysis of a high-precision assembly unit in an automated fashion and choose rational manufacturing methods of machining of parts in the system of automated sequencing of manufacturing methods during process design of the production of multi-nomenclature machining complexes. In addition, the proposed solutions allow for the expansion of digitalization of designing preproduction and process design and the transition to intelligent production systems. The problem posed in the presented study is relevant, since the proposed solutions allow for the expansion of digitalization of designing preproduction and process design and the transition to intelligent production systems in the future.

scholarly journals Improving mathematical, methodological, and algorithmic support of implementation of an enlarged block of design procedures for the analysis of requirements to the highly precise products assembly

2020 ◽  
pp. 15-24
Author(s):  
A. V. Nazaryev ◽  
◽  
P. Yu. Bochkarev ◽  
Keyword(s):  
High Precision ◽  
Process Design ◽  
Production Systems ◽  
Integrated Approach ◽  
Design Procedures ◽  
Algorithmic Support ◽  
Assembly Unit ◽  
Manufacturing Methods ◽  
Product Manufacture

In current conditions, the necessity to produce many high-precision tooling and machines has increased many times over. That is why the improvement of such products manufacture becomes of paramount importance due to the increasing requirements imposed on them. The existing approaches to ensuring the quality and accuracy of high-precision products are not universal and not always can be implemented when producing high-precision goods. For a comprehensive solution to this problem, the authors proposed using an integrated approach – the complex of formalized design procedures of the system for accounting of the requirements to the high-precision products assembly when designing the manufacturing methods of machining. However, for the establishment of relations between the process design and designing preproduction of multi-product manufacture, the transition to the assessment of the production manufacturability of goods and deeper integration of this system into the structure of the system of automated sequencing of manufacturing methods, it is necessary to search for ways to improve the existing approaches of the developed system. The paper considered in detail the enlarged block of design procedures for the analysis of requirements to the assembly of high-precision products, since this stage is directly related to the designing preproduction, and the initial data obtained in the course of its implementation ensure the quality of choice of rational manufacturing methods of machining of parts. The authors propose the techniques to improve mathematical, methodological, and algorithmic support of this enlarged block implementation. The introduction of the proposed solutions will allow performing effectively the design dimensional analysis of a high-precision assembly unit in an automated mode and forming a set of assembly requirements, which, as a result, will allow ensuring the expansion of digitalization of the process design and designing preproduction and the transition to intelligent production systems.

scholarly journals MATHEMATICAL AND METHODOLOGICAL IMPLEMENTATION OF THE COMPLEX OF DESIGN PROCEDURES OF THE SYSTEM OF ACCOUNTING REQUIREMENTS FOR ASSEMBLY IN DESIGN OF MANUFACTURING METHODS OF MECHANICAL PROCESSING

2020 ◽  
pp. 35-39
Author(s):  
A. V. Nazaryev ◽  
P. Yu. Bochkarev
Keyword(s):  
High Precision ◽  
Integrated Approach ◽  
Mechanical Processing ◽  
Assembly Time ◽  
Design Procedures ◽  
Work In Process ◽  
Manufacturing Methods

The structure of the complex of design procedures of the complex of design procedures of the system of accounting requirements for assembly in design of manufacturing methods of mechanical processing is formed in the article, and the mathematical and methodological implementation for the realization of the integrated blocks of design procedures of this system is considered. The employment of this integrated approach within the framework of the existing multi-nomenclature production allows to reduce the assembly time of high-precision products and the number of incomplete parts (work-in-process).

ALGORITHMIC IMPLEMENTATION OF THE COMPLEX OF DESIGN PROCEDURES OF THE SYSTEM OF ACCOUNTING REQUIREMENTS FOR ASSEMBLY IN DESIGN OF MANUFACTURING METHODS OF MECHANICAL PROCESSING

2020 ◽  
pp. 34-42
Author(s):  
A. V. Nazaryev ◽  
P. Yu. Bochkarev
Keyword(s):  
High Precision ◽  
Integrated Approach ◽  
Mechanical Processing ◽  
Design Procedures ◽  
Work In Process ◽  
Manufacturing Methods

The article deals with the algorithmic implementation of the complex of design procedures of the system of accounting requirements for assembly in design of manufacturing methods of mechanical processing. The implementation of this integrated approach within the framework of the existing multinomenclature production made it possible to obtain rational manufacturing methods of mechanical processing of parts that provide a 26 % reduction in the subsequent assembly of high-precision products due to a decrease in the number of assembly iterations. The number of incomplete parts (work-in-process) decreased by 5.5 % on average.

Nonlinear Production Planning of Oil-Refinery Units for the Future Fuel Market in Brazil: Process Design Scenario-Based Model

2014 ◽  
Vol 53 (11) ◽  
pp. 4352-4365 ◽  
Author(s):  
Brenno C. Menezes ◽  
Lincoln F. L. Moro ◽  
Whei O. Lin ◽  
Ricardo A. Medronho ◽  
Fernando L. P. Pessoa
Keyword(s):  
Production Planning ◽  
Process Design ◽  
Oil Refinery ◽  
The Future ◽  
Design Scenario

scholarly journals Solar barycentric dynamics from a new solar-planetary ephemeris

2018 ◽  
Vol 615 ◽  
pp. A153 ◽  
Author(s):  
Rodolfo G. Cionco ◽  
Dmitry A. Pavlov
Keyword(s):  
High Precision ◽  
Orbital Motion ◽  
Giant Planets ◽  
Reference Plane ◽  
The Sun ◽  
The Future ◽  
Dynamical Parameters ◽  
Definition Of ◽  
Invariable Plane ◽  
Planetary Theories

Aims. The barycentric dynamics of the Sun has increasingly been attracting the attention of researchers from several fields, due to the idea that interactions between the Sun’s orbital motion and solar internal functioning could be possible. Existing high-precision ephemerides that have been used for that purpose do not include the effects of trans-Neptunian bodies, which cause a significant offset in the definition of the solar system’s barycentre. In addition, the majority of the dynamical parameters of the solar barycentric orbit are not routinely calculated according to these ephemerides or are not publicly available. Methods. We developed a special version of the IAA RAS lunar–solar–planetary ephemerides, EPM2017H, to cover the whole Holocene and 1 kyr into the future. We studied the basic and derived (e.g., orbital torque) barycentric dynamical quantities of the Sun for that time span. A harmonic analysis (which involves an application of VSOP2013 and TOP2013 planetary theories) was performed on these parameters to obtain a physics-based interpretation of the main periodicities present in the solar barycentric movement. Results. We present a high-precision solar barycentric orbit and derived dynamical parameters (using the solar system’s invariable plane as the reference plane), widely accessible for the whole Holocene and 1 kyr in the future. Several particularities and barycentric phenomena are presented and explained on dynamical bases. A comparison with the Jet Propulsion Laboratory DE431 ephemeris, whose main differences arise from the modelling of trans-Neptunian bodies, shows significant discrepancies in several parameters (i.e., not only limited to angular elements) related to the solar barycentric dynamics. In addition, we identify the main periodicities of the Sun’s barycentric movement and the main giant planets perturbations related to them.

Invited review: Importance of animal health and welfare for the stability of the three pillars of sustainability of livestock systems

2016 ◽  
Vol 7 (2) ◽  
pp. 208-214
Author(s):  
P. Chemineau
Keyword(s):  
Animal Welfare ◽  
Production Systems ◽  
Animal Health ◽  
Holistic Approach ◽  
Population Increase ◽  
Strong Interactions ◽  
Essential Components ◽  
The Future ◽  
The Stability ◽  
Livestock Systems

The future livestock systems at the world level will have to produce more in the perspective of the population increase in the next 30 years, whereas reducing their environmental footprint and addressing societal concerns. In that perspective, we may wonder if animal health and animal welfare, which are two essential components of production systems, may play an important role in the stability of the three pillars of sustainability of the livestock systems. We already know that objectives driven by economy, environment and society may modify animal welfare and animal health, but is the reverse true? The answer is yes and in 11 cases out of 12 of the matrix health-welfare×3 pillars of sustainability×positive or negative change, we have many examples indicating that animal health and animal welfare are able to modify, positively or negatively, the three pillars of sustainability. Moreover, we also have good examples of strong interactions between health and welfare. These elements play in favour of an holistic approach at the farm level and of a multicriterial definition of what could be the sustainable systems of animal production in the future which will respect animal welfare and maintain a good animal health.

scholarly journals Livestock production: recent trends, future prospects

2010 ◽  
Vol 365 (1554) ◽  
pp. 2853-2867 ◽  
Author(s):  
Philip K. Thornton
Keyword(s):  
Cultural Values ◽  
Environmental Sustainability ◽  
Production Systems ◽  
Animal Health ◽  
Developed Countries ◽  
Livestock Production ◽  
Considerable Uncertainty ◽  
Future Production ◽  
The Future ◽  
Livestock Products

The livestock sector globally is highly dynamic. In developing countries, it is evolving in response to rapidly increasing demand for livestock products. In developed countries, demand for livestock products is stagnating, while many production systems are increasing their efficiency and environmental sustainability. Historical changes in the demand for livestock products have been largely driven by human population growth, income growth and urbanization and the production response in different livestock systems has been associated with science and technology as well as increases in animal numbers. In the future, production will increasingly be affected by competition for natural resources, particularly land and water, competition between food and feed and by the need to operate in a carbon-constrained economy. Developments in breeding, nutrition and animal health will continue to contribute to increasing potential production and further efficiency and genetic gains. Livestock production is likely to be increasingly affected by carbon constraints and environmental and animal welfare legislation. Demand for livestock products in the future could be heavily moderated by socio-economic factors such as human health concerns and changing socio-cultural values. There is considerable uncertainty as to how these factors will play out in different regions of the world in the coming decades.

Research Into the Extraction of the Appeal Points of Marine Space in the Okinawa Marine Resort and a Method of Estimating the Accommodated Population

2006 ◽  
Author(s):  
Wataru Miyazaki ◽  
Takeo Kondo ◽  
Kazukiyo Yamamoto ◽  
Motohisa Ootuka ◽  
Hideki Takahashi ◽  
...  
Keyword(s):  
High Precision ◽  
Annual Number ◽  
Research Project ◽  
Unique System ◽  
Tobacco Tax ◽  
Okinawa Prefecture ◽  
The Future ◽  
Resource Elements

In the formation of a marine resort, the extraction of the various appeal points of marine space is an important issue. For this reason, this research project targeted Kumejima in Okinawa Prefecture, Japan, and considering tourists who visit the resort as the target of the study, a decision was taken to evaluate the quality of the appeal points that comprise the resort. As a result, the appeal points of marine space were found to be comprised of three main resource elements and 13 categories related to these elements. The accurate number of tourists who visit a resort, be it marine resort or otherwise, must be grasped in order to plan the promotion of the resort and reactivation of the community. For this reason, this research project proposed a method of grasping such trends utilizing tobacco tax that is a unique system of taxation in Japan. As a result, time and cost were conserved compared to past methods and it was possible to grasp the annual number of tourists with high precision. Based on these results, it is believed that materials that indicate the direction of the formation of marine resort in Kumejima in the future have been provided.

Sign in / Sign up

Export Citation Format

Share Document