Latvian Maritime academy

MATHEMATICAL MODEL OF ROLLING COMPRESSION
OF BAKED LAYER OF INSIDE SURFACE
OF CYLINDER BUSH OF MARINE ENGINE
Rasim Cavad Bashirov
Azerbaijan State Marine Academy, 18 Z. Aliyeva Street, Baku, AZ 1000, Azerbaijan,
E-mail: akademiya@adda.edu.az
Mahammad Bagir Akhundov
Azerbaijan State Marine Academy, 18 Z. Aliyeva Street, Baku, AZ 1000, Azerbaijan,
E-mail: makhundov@mail.ru
Abstract
Model description of process of restoration of inside surface of cylinder bush of marine engine, realized
by method of spraying of surface layer with it subsequent compression by rolling arrangement is given.
Dependence of quantity and time of compression, also force of strength to swinging of rolling velocity
and force influence of rolling arrangement on compression layer are obtained.
Keywords: bush, compression, glutinous plastic strength to swinging.
Introduction
Restoration of inside surface of cylinder bush of marine engine is accompanied by numerous factors,
directly influencing both on quality of carried out repair works and on further exploitation characteristics
of this bush. Among these factors there are deformation parameters, as for example, intensity of
compression process and created strength strained condition in compression layer [1].
Investigation of influence of these factors, creation of adequate mathematical model of the realizing
technological process allows to manage the formation of geometrical parameters of surface layer of
cylinder bush, when purposely and well rolling them with torus rolls.
Organization of a task
Arrangement for rolling of inside surface of bushes, offered in (1) is schematically given in Figure 1.
It includes three torus rolls, disposed symmetrically along circle. We shall consider that the diameters of
rolls are less than the diameters of inside surface of bush. In this case the motion of roll around circular
orbit may be substituted by the motion along straight line boundary of layer.
Figure 1. Arrangement for rolling of inside surface of bushes
As the hard properties of the material of bushes and rolls considerably excel the hard property of
baked layer, we shall in the future neglect the deformation properties of material of bushes and rolls,
considering them absolutely hard. Then the task about the compression of baked layer of inside surface
bush at its rolling of three-system rolls may be presented as a task about the rolling of plane layer when
swinging cylinder at given velocity of motion of its axis (Figure 2). We shall neglect the influence of
contact of baked layer and bush in the first approach.
4