Metalloobrabotka № 2 (80)/2014

Processing Of  Materials By Cutting

Vasilkov D. V., Kochina Т. В. Elastic after-effect in details at high-speed processing by cutting

The method of settlement definition of an elastic aftereffect of deforming ability of residual tension in details is offered at high-speed processing by cutting. The method is based on the invariant review of force and temperature fields on the basis of the determined consistent pattern of additivity of an after-effect in volume parts and blankets of couples of tribo-interface when cutting.

Keywords: elastic after-effect, residual tension, cutting, high-speed processing.

Bratchikov A. Y. Method for improving the surface quality of parts and cutting properties of grinding wheels

This article discusses a method of increasing the cutting ability of the grinding wheel by their impregnation (impregnation) cutting-active substances in grinding hard materials for example steel 0H18N10T. The experiments found that impregnation of laps increases their resistance to 1,5-2,0 times while significantly improving the quality of ground surfaces. The article also provides technological advice on the use of impregnated abrasive wheels.

Keywords: abrasive, circle, grinding quality.

Electrophysical And Electrochemical Processing Methods

Sokolov Yu. A. Structurally-parametrical optimization of process of layerwise synthesis of products by electronic beam

The present article explains questions of structurally-parametrical optimization of process of layerwise products' synthesis by electronic beam. The effective decision of applied problems in many respects depends on choice of optimal processing practices.

Keywords: mathematical modeling, synthesis of products, electronic beam, optimization.

Antipov N. A., Medko B. S. Determination of the defective surface layer at the air-plasma cutting of workpieces of carbon low-alloy steel

In article the task to determine the size of a zone of thermal influence at air-plasma is set are sharp the high carbon low-alloyed steel for calculation further an allowance on preparation machining. As a result of the made experiments and calculations the settlement scheme for definition of thermal cycles of points of preparation at air-plasma cutting is offered, the formula for allowance definition on preparation machining from the alloyed steel after air-plasma is offered are sharp, numerical value of an allowance for a real detail after air-plasma is received are sharp.

Keywords: air-plasma cutting, thermal cycle, quality of the air-plasma cutting, depth of a zone of thermal influence, sample.

Metal Forming

Fomichev A. F., Panin S. Yu. Computer modelling of cold stamping of corrugations and hot stamping of fittings

Results of computer modelling sheet stamping of corrugations and hot volume stamping of a fittings from a titanic alloy are given.

Keywords: program Simufact Forming, two options of sheet stamping, metal sticking on tool.

New Materials And Production

Serebrenitsky P. P. Modern models of control (NC)

In modern machines with the numerical control (NC) according to classes of NC systems many of various types (models) which quantity is rather numerous and it is various. The models of NC systems of production of the Russian and some foreign firms presented in the Russian market are briefly considered. Some characteristics of devices, features of designs and their application are provided.

Keywords: the device of numerical control (NC), firms — producers of NC systems, classification of NC systems, CNC, DNC, HNC, CAD/CAM of system.

Practical Experience

Shokin A. V., Shvetsov S. A., Polyakov I. V. Special crowns for cutting out tubes containing defective SFAs and welded to MFB lepse storage plate

The special cutting tools — crowns — are developed by JSC „Afrikantov OKBM" to cut out tubes containing defective spent fuel assemblies (SFA) and welded to the storage plate aboard the Floating Maintenance Base Lepse. The crown design is determined by the limiting dimensions and harsh processing conditions. Based upon the conditions, a whole range of solutions provided by cutting tool innovators are used in the crown design and geometry. As part of development work, JSC „Afrikantov OKBM" conducted testing to define the design of the crown with the sharpening geometry that is most effective for cutting in adopted cutting modes. The combined use of design solutions resulted in the development of quick-detachable tools capable of operating under severe conditions in radiation environment.

Keywords: annular crowns, heads for annular cutting, crown bits, annular bits, bits for annular cutting.