Metalloobrabotka № 6 (90)/2015

Mikhailov S. V., Kovelenov N. Yu., Mikhailov A. S.,

Andriyanov A. D. Development and processing of complex-shaped turning inserts for refractory alloy machining applications

The paper describes the demands to be met by turning tools used for machining of stainless, refractory and Ti alloys, based on the investigation of the cutting mechanisms. The identified design features are important for development of complex-shape indexable faceted cutting inserts to be used under severe strains, high stress, and high-temperature conditions. The material and technology features crucial for processing of such inserts are described. The results achieved in turning tests with sample inserts and stainless & refractory alloy workpieces are also presented.

Keywords: difficult-to-machine materials, tool design, chip breaking, complex-shape turning inserts.

Novikov V. V. The calculation of mechanical stresses in the chips at the orthogonal free cutting

The stress state in the zone of chip formation in the cutting blade can be described by the stress tensor. The calculations performed by the proposed model show that the location of sites of maximum shear stress correspond to the texture of the chip. The results of calculations qualitatively describe the existing experimental dependences allows us to make quantitative estimates that are close to the experimental results, predict the conditions of appearance of a positive tensile stress.

Кеуwords: orthogonal cutting , coefficient of friction, chip, mechanical tenses, shear plane.

Vasilkov D. V., Kochin T. B., Nikitin A. V. Experimental and settlement determination of technological residual tension in a blanket of thin-walled disks when processing by turning

Idea of the deforming ability of residual tension in the form of the moment loading brought to a surface is formulated. The settlement and experimental method of their definition is offered. The method of calculation of torques from action of the deforming ability of residual tension in relation to discrete is offered models of thin- walled disks of a difficult spatial outline when processing by turning. The simplified technique of settlement and experimental definition of residual deformations from action of the deforming ability of residual tension of the mechanoprocessed thin-walled disks is developed. Prerequisites for the solution of a problem of management of residual deformations of thin-walled disks when machining are created by turning.

Keywords: turning, thin-walled disk, blanket, techno- logical residual tension

Mokritskii B. Ju., Pustovalov D. A., Sablin P. A., Konnova G. V., Kravchenko E. G. Parametric study com posite carbide end mills

The high price of carbide end mills is no evidence that the required accuracy of workpiece machining, and performance can be obtained only by a cutter. These indicators can be achieved using composite milling cutters, in which the tail part made of structural material, the working part — of the carbide material between a portion oriented and connected. Variants of orientation and connections may be different, it affects the performance and the scope of a particular embodiment of the cutter.

Keywords: selection of efficient ratio of the lengths of the various sections of composite carbide end mills, reducing the value of the instrument, ensuring accuracy.

Sokolov Yu. A. Preparation of composite products based on hybrid technology

The article discusses a new approach to the preparation of powder and composite products of different chemical composition from the programmable structure is not implemented within the framework of equilibrium and qua- si-equilibrium processes, methods layered electron beam melting / sintering, brazing and spraying.

Keywords: stratified synthesis of hybrid technology, additive techniques, composite products, electron beam, ion beam, electron beam evaporation.

Evseev D. G., Kulkov A. A., Korytov A. U. Research of process of forming of surface quality when processing cars gas-dynamic method

Effective and durable painting cars in their manufacture and repair requires the preparation of coated surfaces, consisting in providing them quality, giving you need when painting roughening and degreasing. In the article the generalized results of researches of gas- dynamic treatment of the metallic surfaces of cars on the interaction of free abrasive grains and workpiece surface.

Keywords: loose abrasive machining, roughness, surface quality, degreasing, passenger car.

Fomichev A. F., Panin C. Yu. Computer research of a zakovka of internal cracks when forging

Results of computer research of conditions of closing of internal cracks are given in cast ingots when forging. Operations of a broach and rainfall are investigated. Dynamics of tea leaves of the cracks which are in various zones of ingots is established

Keywords: Simufact Forming program, models of internal cracks, operations of a broac.

Tashevskiy A. G., Ivanov V. N. Determination of the contact resistance of surface treated parts

The model of calculating the strength of carburizing and deep contact heart of parts on the basis of the common criteria, assuming alternating layers of hardened depth parameter of plasticity. Influence of change of the specified option on the strength characteristics of the contact.

Keywords: contact resistance; test of limit state; the plasticity; chemical heat treatment.

Kulikov M. Y., Inozemtsev V. E., Bocharov A. A.

Investigation of the process of formation when combined milling and electrochemical machining of aluminum

It is now known high efficiency of manufacturing opera- tions combined types, this is the technological approach allows you to vary widely the values of the input param- eters of the process of forming and managing quality criteria. However, a wide variety of process parameters, which play a significant role in the formation of surface roughness when processing difficult to determine the op- timal values of the factors included in their interaction in the conditions of the manufacturing process. That is why the study of attention is paid to various combinations of blade machining aluminum overlay circuit with different coolants environments, as well as reduce the intensity of unwanted dynamic and thermal effects on technological systems and processes of formation in modern conditions of the manufacturing industry.

Keywords: aluminum, milling, finishing, surface roughness, combined treatment, quality parameters, modes, cutting fluids.

Medunetskiy V. M., Nikolaev V. V. The comparison methodology of engineering solutions for ensuring quality coefficients mechanical systems

The article considered the interrelation of quality stages and design stages of mechanical systems taking into account the evolution of modern technology.

The advisability of analyzing in detail a design phase as the initial process of providing the product quality coefficient is identified. It is noted that developer in practice often resorted to an expert estimation when solving choice problems. The method of engineering so- lutions comparisons is based on the method of expert estimations and the purpose of improving the quality of the developed products. The proposed method is exa- mined on the example of the automatic gripper of a cluster fuel assembly. The algorithm of the methodo- logy is demonstrated on the example and the result is obtained when using the proposed method. The conclusions about the advisability of using this methodology in practice are made.

Keywords: quality, designing, comparisons of enginee- ring solutions, methods of expert estimations.

Simonova L. A., Khisamutdinov R. M., Sungatov I. Z.

Automated subsystem shaping special disk tool

The automated subsystem forming a special disk tools. The module mathematical modeling of the profile of the disk tool and algorithm, a program for calculating the parameters of the helical flute and coordinate points of the spherical surface of the screw profile cutters.

Keywords: Simulation, forming a special disk tools, profile of helical surface.