Fot A.P., Reshetov S.Yu., Mullabayev A.A.
GEARBOX DESIGNING BASED ON THE CLOSED DIFFERENTIAL DEVICE ^{[№ 9 ' 2015]}
At design of test benches for corrosion and mechanical tests of materials in the modes with a big difference of working speeds (in thousands and tens of thousands of times) executive devices, captures for samples at tests for stretching as imparted, consecutive installation of several transmission gears was used, and ensuring two various speeds of tests required two kinematic chains that led to unfairly overestimated weights and dimensions of the drive. This problem is offered to be solved use in drives of known transmission gears — the closed differential mechanisms with tooth gearings. The transmission ratio of these mechanisms reach values in some millions and are practically limited only to the mechanism efficiency value that sharply falls with growth of value of the transmission ratio. The use of the offered scheme of a gearbox based on the closed differential allows with a sufficient accuracy to receive two preset values of the transmission ratio differing in tens of thousands times. Taking into account observance of conditions of coaxiality, the neighbourhood and assembly the ratio of numbers teeth of Z₁ and Z₃ must be provided: Z₃ = 3Z₁ + 2. In this case the value of the total ratio of the box i₁₃ (from the guide link 1 to the driven link 3) will be determined by the formula i₁₃ = [(3Z₁ + 2)Z₅Z₇] / [2Z₄Z₆(2Z₁ + 1) — Z₁Z₅Z₇] for the first speed or i₁₃ = [(3Z₁ + 2)Z₅"Z₇] / [2Z₄"Z₆(2Z₁ + 1) — Z₁Z₅"Z₇] for the second speed. For the negative effects excepting when cutting wheels teeth (teeth cutting and sharpening) it is recommended to take wheels teeth numbers of the box in the range of 17…160. Taking into account preliminary researches the interval of teeth number values from 17 to 52 is recommended for Z₁. Selection of wheels teeth numbers of the locking part is the most difficult, and the options quantity of numbers combinations of wheels teeth has millions. In this regard the transmission ratio of transmissions of the locking part is expressed through the demanded transmission ratio of i₁₃ and possible value of Z₁: (Z₄Z₆) / (Z₅Z₇) = [Z₁i₁₃ — 3Z₁ — 2] / [i₁₃ (4Z₁ + 2)]. Further i₁₃ value and Z₁ value are substituted in the formula, the received calculated value of the right part of the formula is transferred to the special computer program of selection of wheels teeth numbers of Z₄, Z₅, Z₆ and Z₇ (or Z₄”, Z₅”, Z₆ and Z₇) two-level tooth gearing.

Mullabaev A.A., Fot A.P., Chepasov V.I., Zurnadzhan N.V., Romantsov V.N.
ON THE WAY TO MODERNIZE GUITAR MACHINE TOOL ^{[№ 1 ' 2013]}
In article options of creation guitar machine are considered, the formula of calculation of theoretical quantity of the transfer relations in guitar machine with varied interaxal distances of tooth gearings used in guitar on the basis of combination theory methods for any number of variations of interaxal distances is offered, efficiency of separate guitars is estimated.

Chepasov V.I., Mullabaev A.A., Phot A.P.
GENERATION OF A SET OF CALIBRATED SIZES USING REGRESSION LIMITS ^{[№ 4 ' 2011]}
The technique of generation of the source array of calibrated sizes (for example, a set of end measures, probes, etc.) to produce an output array of calibrated sizes (compiled using the dimensions of a set of measures) with optimal characteristics is regarded in this work. As the inequality constraints are used difference estimates obtained using regression equations.

Chepasov V.I., Mullabaev А.А., Fot А.P.
OPTIMIZATION OF QUANTITIES OF CALIBRATED DIMENSIONS ^{[№ 2 ' 2010]}
The report addresses the method for determination of initial dimension stock for obtaining calibrated dimensions output stock with optimum characteristics. The basic parameters found through the factor analysis were used as parameters-arguments for the target function.

Mullabaev А.А., Fot А.P., Romantsov V.N., Reshetov S.Yu., Seytpanov S.Т.
SYNTHESIS OF FULL-STRENGTH WHEELWORKS WITH ONE CONNECTED GEAR ^{[№ 1 ' 2010]}
The paper focuses on the issues of structural and cinematic synthesis of the singly connected gear box with consideration of the contact strength of the wheel teeth. The research object is the wheel and gear boxes of machine tools.

Chepasov V.I., Mullabaev А.А., Fot А.P.
GENERATION OF INITIAL SET CALIBRATED DIMENSIONS ^{[№ 1 ' 2010]}
The paper focuses on the technique of generation of initial body with calibrated dimensions for the output of the calibrated dimension body with optimum characteristics. For the parameters being arguments of the objective function basic parameters obtained through factor analysis were used.

Mullabaeva E.Z., Fatykhova A.V.
SOME CHARACTERISTICS OF LILIUM MARTAGON L. CENOPOPULATIONS IN SOUTH URAL ^{[№ 6 ' 2009]}

Mullabaev A.A., Romantsov V.N., Fot А.P.
ON THE WAYS FOR CONSTRUCTION OF MACHINE TOOL STATION GEARBOXES ^{[№ 5 ' 2009]}
The ways for construction of machine tool station gearboxes which ensure realization of required geometric series of the output shaft speed in the three-shaft box with three and more connected gear-wheels, uniform distribution of the control range between the first and second groups of the box gears, decreasing of the overall dimensions and mass of the gearboxes with gear drives. A list of 12 sources used is provided.

Mullabaev A.A., Fot A.P., Pavlov S.I.
ABOUT USING OF MATHEMATICAL MODELING IN SOME TASKS OF MECHANICAL ENGINEERING ^{[№ 2 ' 2006]}
Using of mathematical models simplifies essentially the process of parameters optimization of complex technical objects (for example, gear-box and machine feed, grids and others). The solution of one more important task of mechanical engineering – parameters optimization of end measures admission is suggested in this article.

Mullabaev A.A., Fot А.P.
OPTIMIZATION OF SETS OF END MEASURES AND PROBES ^{[№ 4 ' 2005]}
In mechanical engineering sets of end measures and probes are widely distributed, used for the sizes definition and for adjustment of measuring devices. The necessary sizes are made from several end measures. In the work the problem is solved of minimization of end measures quantity in sets under condition of preservation of the row of made sizes.