No 2 (2009)

In clause influence of tangential fluctuations on a roughness of the processed surface is investigated. It is shown, that application combined державки a cutter leads to decrease in a roughness.

The article is devoted to research of vibration mechanism that has influence in cutting process. This publication is dedicated to ultrasonic machining as means of amplitude regulation of cutting tool autooscillations by means of relaxation with high frequency of potential energy, being accumulated in elastic system while cutting chip. Some examples of oscillation were given by mechanical working of different materials.

On poljarizatsionno-optical models the is intense-deformed condition of knot of fastening of a cutting plate is studied. Fields of pressure depending on a material and geometry of the basic plate, arising are modelled at cutting in the field of contact of a cutting plate to a basic and basic plate with the cutter case.

Friction stir welding is a refreshing approach to the joining of metals. Although originally intended for aluminum alloys, reach of FSW has now extended to a variety of materials including steels and Polymers. This review deals with the fundamental understanding of the process.

In work the description of a design and results of research of characteristics a drilling- milling cartridge is resulted.

The equation (7) gives dependence between single-shaft gas turbine output and rotation frequency.

On an example of designing a head of small-sized diesel engine MD-8 the technique and results of the analysis of a thermal condition of a design with use of toolkit Solid Works and COSMOS Works are resulted. It is shown, that existing in Autodesk Inventor the concept of the organization and construction of assembly units is most convenient in internal-combustion engine design in view of great volume of changing analyzed parameters.

The urgency of a problem of creation of research stands for testing small sized IСE is defined by a wide circulation of engines of such type for mechanization of the manual skills, intended for use in structure of mobile vehicles and means of mechanization of auxiliary operations. During too time carrying out of tests of such type of engines at typical brake stands with the maximal rated power tested ICE 50-100 kW unfairly neither from the economic point of view, nor from the point of view of maintenance of comprehensible metrological characteristics. In article the basic approaches to create of the small sized stand basis of serially let out devices and known technological decisions are considered.

The analysis of dependences of an estimation of a level of the sound power, offered by various authors, with reference to two inlet radial fans and to one-stage radial compressors with blade's diffuser is given. The new formula for an estimation of a level of the sound power, taking into account, as aerodynamic characteristics, so geometrical parameters of radial machines is offered.

Analysis of refrigerant influence on heat pump performance is given in this paper. Advantages of alternative refrigerants are shown.