Bulletin PNRPU. Mechanical engineering, materials science

Here are shown the research results of energy distribution during plasma-arc welding using reverse polarity current with combined gas feeding. Thermal capacity of plasmotron in developed method is less than 10 % of total capacity of the constricted arc which in size is comparable to air plasma cutting using direct polarity current. It is found that energy consumption for running meter cut using this method in 1,5–2 times lower than for the traditional methods.

In article process of correction of geometrical deviations in a longitudinal section by means of a variation of intensity of removal of a layer of an allowance is considered at change of frequency of an axial ostsillyation of per unit length processed bore. Probe of process of correction happens at a honing of cylindrical spiral spring hone. The mathematical model of the area of a removed allowance in a longitudinal section is removed. The mathematical model which unites the size of a removed allowance and frequency of the axial ostsillyation, per unit length processed bore is also removed. Results of experimental check of adequacy of mathematical models on a basis which the surface of a response coordinating dependence of coefficient of an correct of honing bores from the most influential parameters of processing, namely frequencies of an axial ostsillyation is received are presented. Optimum values of input parameters of processing influencing process of correction of geometrical deviations are defined.

Method of of determination of the coefficients of friction was developed. The coefficients of friction of a composite material based on expanded graphite in water, oil and no lubricant are studied.

According to new educational standards of the higher vocational training extracurricular should become uniform process together with training. The problem of realization of a question of extracurricular in the basic educational program for students of technical directions is solved in the article.