On deformation of thin-walled parts while turning on the lathes
Engineering Education # 02, February 2014
The paper studies the overall picture of deformation of thin-walled parts while turning them on the lathes. Its objective is to define configuration and value of the process-induced deformations under turning conditions of mechanical engineering. The paper investigates the parts of class “tube” and “disk”. A solution of the problem under consideration uses computer simulation in ANSYS software environment. The study task is to estimate the prospects for concept development to machine the thin-walled parts with controlled deformation under “soft” turning conditions. The simulation has shown that the change of turning conditions within the studied intervals causes changing deformations of parts in the range from 0.1 to 3 values of tolerance zone. This result can be a basis to plan further activities in the field concerned.
Selection of a metal-cutting machine model: a formalized approach
Engineering Education # 12, December 2013
The article covers formalisation of procedures of selecting technical equipment tools during the design of technological processes. A general analysis of the problem was carried out; it was approbated on a practical task of machine selection. The problem was solved by a standard two-stage scheme: 1 – selection of potentially suitable models of machine; 2 - selection of the most preferred model. The methodology of comparative analysis of numerical and linguistic vectors was applied as a tool for formalising the solving procedure of this task along with the methodology of multi-criteria optimisation of choice. The obtained results confirmed the possibility of practical solving of this problem based on application of the mechanisms of the quantitative analysis and the procedures described by formal algorithms.
Comparative analysis of metal-cutting equipment under production engineering
Engineering Education # 03, March 2013
The article deals with analysis of general approaches used to formalize the procedure of selecting metal-cutting equipment. The author emphasizes importance of the discussed problem for choosing metal-cutting machine and analyzes general conditions of selecting metal-cutting equipment. It is shown that the process of selecting metal-cutting equipment refers to the multi-criterion optimization problem in the area of decision-making process. Theoretical prerequisites for formalizing main stages of selecting technological equipment are determined. Methods of alternative comparative analysis, which can be used to solve the specified problem, are analyzed. The author proposes a general algorithm for choosing the preferred model of metal-cutting equipment that meets the predetermined production condition and limitations.
77-30569/367809 Multi-variance of structural solutions for development of technological process of machine processing
Engineering Education # 04, April 2012
The article refers to the common question of project process multi-variance that can be used in efficient problem solving. The authors consider one of the approaches to multi-variant project solution generation during the development of technological processes of machine processing at the phase of creating the functional structure and operational instruments. It was shown that methodology of the decision-making theory can be used as a means of formally informed choice of the preferred alternative from a set of generated solutions.
Optimization technological planning: biparametricheskaya maxi-mine task
Engineering Education # 04, April 2011
The article refers to the possibility of technological projects optimization on two opposite parameters (parameters raising and lowering quality of the project). The schematic analytical optimization method is used for problem solving, based on modeling of designed technological process on directed network, loaded with two weight functions simulating optimized parameters of the designed process. The optimization mechanism includes: modeling of process on directed network; pseudo-hierarchical transformation of network; identification of the maximum stream on network using the method of cuts; transformation of pseudo-hierarchical network to the tree of through streams and search of topological configuration of the maximum streams on network; searching the configuration of the required maximum stream of minimum cost. The article also describes an example of practical use of the considered method by modeling the technological process of the maximum productivity and the minimum industrial cost.