IMPROVEMENT OF METHODICAL SUPPORT IN OPERATION SETUP OF UNIVERSAL MACHINE-TOOLS AT MOTOR CAR REPAIR COMPANIES

2021 ◽  
Vol 2021 (6) ◽  
pp. 36-46
Author(s):  
Andrey Fot ◽  
Vladimir Rassoha ◽  
Evgeniy Pen'kov
Keyword(s):  
Comparative Analysis ◽  
Machine Tools ◽  
Numerical Experiments ◽  
High Performance ◽  
Operation Time ◽  
Gear Train ◽  
Labor Intensity ◽  
Universal Machine ◽  
Gear Trains ◽  
Definition Of

The investigation purpose: simplification and ensuring tooling high performance of two-pair gear trains in machines with change gears. Methods used: numerical experiments for the characteristics definition of change gear sets in gear trains, a comparative analysis of different sets characteristics, a result visualization in a table form. Relevance of the method offered is substantiated with considerable labor intensity in the definition of the gear combination in gear trains by existing methods based on tables use mainly through possible way selection. Novelty: there are offered special algorithms of setup calculations decreasing operation time for the choice of gear combinations of gear trains. Basic results: there are developed computer programs for the definition of gear train combinations required and an electronic directory for machine-tool two-pair gear train setups recommended for use by workers of technological departments and in design service in production activities of engineering and motor car repair companies, in research centers and colleges (in thesis investigations, in training processes of engineering experts).

Gear-train design

1971 ◽  
Vol 321 (1545) ◽  
pp. 163-167 ◽  
Keyword(s):  
Computer Graphics ◽  
Machine Tools ◽  
Gear Train ◽  
Gear Trains ◽  
Conventional Methods

This paper describes how ‘computer graphics’ is being applied to the design of gear-trains, which are used in special-purpose machine tools, by Mulhead Limited. The graphics console allows the engineer to exercise control over the program while a design is being created, thus combining the experience of the designer with the power of the computer. As the computer also produces the finished working drawings, parts lists etc., this program produces substantial savings in time and cost over conventional methods.

Problems in the Design and Development of an Economical Automobile Gear-box

1953 ◽  
Vol 7 (1) ◽  
pp. 11-27 ◽  
Author(s):  
T. C. Stott
Keyword(s):  
High Performance ◽  
Small Diameter ◽  
Gear Train ◽  
Vehicle Performance ◽  
Helical Gears ◽  
Close Study ◽  
Gear Trains ◽  
Satisfactory Life ◽  
Useful Life ◽  
Compact Design

The demand for still greater reductions in weight together with the general stepping-up of vehicle performance with larger power units has placed upon the transmission engineer the onus of producing a small, lightweight and compact design yet capable of giving a satisfactory life. Economy in both weight and cost has become a primary requirement, and if this is to be met, a close study must be made of all the detailed components in order that the utmost can be obtained from each pound of material used. The maximum possible life of spur and helical gears is seldom achieved, as premature tooth failure occurs through poor face comformity of the mating teeth. The causes and effects of such nonconformities, whether dimensional or resulting after heat treatment, are dealt with, and the measures that can be adopted for their correction discussed. The elimination of any tendency to corner loading and, to a finer degree, the crown shaving of the teeth enable higher basic stresses to be adopted with corresponding smaller and more economical gear trains. Investigations into syncromesh mechanisms have indicated that synchronizing efficiency depends largely on attention to certain small details. An appreciation of these points will permit of quite small diameter synchronizers functioning satisfactorily without their useful life being in any way impaired by the higher loadings involved. Syncromesh problems are treated generally with particular detailed reference to design for high performance. It is unfortunate but nevertheless axiomatic that the tendency to self-disengagement of the gears increases as the loadings and stresses of the components are increased, and no paper on the design of an efficient economical transmission could be complete without its mention. The general causes of self-disengagement are discussed together with design features which can be embodied for its avoidance. The problems generally associated with the gear train which present definite requirements, of the casing, shafts, selector mechanism, etc., are dealt with. In conclusion, descriptions of the test equipment and tests used in the development of high-duty transmissions are given. The MS. of this paper was received at the Institution on 5th February 1953. For the Report of the meeting in London, at which this paper was presented, see p. 27.

Engagement as a Reflection of Communicative Potential

Communicology ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 27-33
Author(s):  
N.V. Kirillina
Keyword(s):  
Comparative Analysis ◽  
Interdisciplinary Research ◽  
Strategic Communication ◽  
Phenomenological Tradition ◽  
The Social ◽  
Social Potential ◽  
Definition Of ◽  
Communicative Processes

The paper represents the analysis of the concept of communicative. The choice of topic is determined by the search for criteria and tools for assessing the results of strategic communication, taking into account the development of its interactive forms. The author leads the existing approaches to the definition of the concept of engagement and identifies the areas for further interdisciplinary research of the specified subject, and raises the issue of the appropriateness of using the engagement indicators in the assessment the social potential of communication. The work is based on the phenomenological tradition in the interpretation of communicative processes and the metamodel of communication of R. Craig. The author uses the methods of comparative analysis, analogy, generalization, and combined methodology of interdisciplinary analysis.

scholarly journals A Comparative Analysis of Techniques Used to Estimate the Mean Recoil Compressive Strength of High Performance Polymers

2004 ◽  
Vol 16 (3) ◽  
pp. 381-390 ◽  
Author(s):  
Meghan Spence ◽  
James A. Newell ◽  
Michael Lynch ◽  
T. J. Lee ◽  
Jenn Demetrio ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Comparative Analysis ◽  
High Performance ◽  
High Performance Polymers ◽  
The Mean

A New Technique Based on Loops to Investigate Displacement Isomorphism in Planetary Gear Trains

2002 ◽  
Vol 124 (4) ◽  
pp. 662-675 ◽  
Author(s):  
V. V. N. R. Prasad Raju Pathapati ◽  
A. C. Rao
Keyword(s):  
Graph Isomorphism ◽  
Planetary Gear ◽  
Degree Of Freedom ◽  
Gear Train ◽  
Graph Representation ◽  
Kinematic Structure ◽  
Graph Representations ◽  
Planetary Gear Trains ◽  
Gear Trains ◽  
A New Technique

The most important step in the structural synthesis of planetary gear trains (PGTs) requires the identification of isomorphism (rotational as well as displacement) between the graphs which represent the kinematic structure of planetary gear train. Previously used methods for identifying graph isomorphism yielded incorrect results. Literature review in this area shows there is inconsistency in results from six link, one degree-of-freedom onwards. The purpose of this paper is to present an efficient methodology through the use of Loop concept and Hamming number concept to detect displacement and rotational isomorphism in PGTs in an unambiguous way. New invariants for rotational graphs and displacement graphs called geared chain hamming strings and geared chain loop hamming strings are developed respectively to identify rotational and displacement isomorphism. This paper also presents a procedure to redraw conventional graph representation that not only clarifies the kinematic structure of a PGT but also averts the problem of pseudo isomorphism. Finally a thorough analysis of existing methods is carried out using the proposed technique and the results in the category of six links one degree-of-freedom are established and an Atlas comprises of graph representations in conventional form as well as in new form is presented.

A Lightweight Split-Torque Transmission for a 330 KW Helicopter

1982 ◽  
Vol 196 (1) ◽  
pp. 11-22 ◽  
Author(s):  
G White
Keyword(s):  
Gear Train ◽  
Main Rotor ◽  
Speed Reduction ◽  
Torque Transmission ◽  
Current Production ◽  
Gear Trains ◽  
Fixed Axis ◽  
Three Stages ◽  
A Current ◽  
Split Torque

A simple split-torque gear train is used as the main rotor transmission of a single-engine helicopter. Overall speed reduction ratio achieved is 103:1 between the engine at a nominal 36 000 rev/min and the main rotor at 350 rev/min. This ratio is generated from three stages of fixed-axis gear trains containing only eight gears. Alternative configurations are outlined and discussed. Comparison with a current production design shows the split torque arrangement offers reductions in weight, height, and drive train losses. A low total of gears and bearings offers the potential for improved reliability.

Position and Speed Detection of Synchronous Motor Rotor

2012 ◽  
Vol 236-237 ◽  
pp. 61-66
Author(s):  
R.M. Tao ◽  
X. Tao ◽  
C.R. Xiong
Keyword(s):  
Machine Tools ◽  
High Performance ◽  
Synchronous Motor ◽  
Pole Position ◽  
Cnc Machine Tools ◽  
Detection Accuracy ◽  
Cnc Machine ◽  
Velocity Signal ◽  
Signal Demodulation ◽  
Server System

This article describes a method to detect the position and speed in a rotary transformer pole AC synchronous motor. This method gives the pole position and velocity signal demodulation circuit and analyses the demodulation principle. After practical testing, this approach is reliable with high detection accuracy. Therefore, it is fully able to meet the needs of CNC machine tools with high performance in AC server system.

Topological Synthesis of Epicyclic Gear Trains Using Vertex Incidence Polynomial

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Vinjamuri Venkata Kamesh ◽  
Kuchibhotla Mallikarjuna Rao ◽  
Annambhotla Balaji Srinivasa Rao
Keyword(s):  
High Velocity ◽  
Mechanical Energy ◽  
Gear Train ◽  
Recursive Method ◽  
Gear Pair ◽  
Simple Method ◽  
Epicyclic Gear ◽  
Thick Line ◽  
Gear Trains ◽  
Isomorphic Graphs

Epicyclic gear trains (EGTs) are used in the mechanical energy transmission systems where high velocity ratios are needed in a compact space. It is necessary to eliminate duplicate structures in the initial stages of enumeration. In this paper, a novel and simple method is proposed using a parameter, Vertex Incidence Polynomial (VIP), to synthesize epicyclic gear trains up to six links eliminating all isomorphic gear trains. Each epicyclic gear train is represented as a graph by denoting gear pair with thick line and transfer pair with thin line. All the permissible graphs of epicyclic gear trains from the fundamental principles are generated by the recursive method. Isomorphic graphs are identified by calculating VIP. Another parameter “Rotation Index” (RI) is proposed to detect rotational isomorphism. It is found that there are six nonisomorphic rotation graphs for five-link one degree-of-freedom (1-DOF) and 26 graphs for six-link 1-DOF EGTs from which all the nonisomorphic displacement graphs can be derived by adding the transfer vertices for each combination. The proposed method proved to be successful in clustering all the isomorphic structures into a group, which in turn checked for rotational isomorphism. This method is very easy to understand and allows performing isomorphism test in epicyclic gear trains.

The Philosophy of Sobornost as a Prototype of Ferdinand Tönnies’ “Sociological Conservatism”

2021 ◽  
pp. 49-59
Author(s):  
Nikita K. Siundiukov ◽  
Keyword(s):  
Comparative Analysis ◽  
Reference Points ◽  
Natural State ◽  
The Political ◽  
The Social ◽  
Political Theories ◽  
Definition Of

The article presents a comparative analysis of the theory of Ferdinand Tönnies “Gemeinschaft/Gesellschaft” and the philosophy of catholicity in the works of A.S. Khomyakov and I.V. Kireevsky. The theory of Tönnies is considered in the light of the concept of “sociological conservatism” manifested by A.F. Filippov. It is shown that the conceptual opposition “Gemeinschaft/Gesellschaft” can be seen continuation of the discussion about the “nature of the social”. In this light, the main reference points of Tönnies sociology are the political theories of Aris­totle and Hobbes, with an emphasis on the definition of the “natural state” of man. Based on the analysis of Tönnies theory, it is shown that its comparison with Slavophilism is possible in three parameters: appeal to the factor of sub­stantiality, the dichotomy of “historical” and “non – historical” and the use of the concept of “organic”. It is proved that in the context of a “conservative” reading of the philosophy of sobornost, its argumentation turns out to be mainly political and sociological

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