Abstract. The paper deals with the problems of the component simulation method application in the problems of the automation of the mechanical system model formation with the further possibility of their CAD-realization. The purpose of the investigations mentioned consists in the automation of the CAD-model formation of high-speed mechanisms in automatic machines and in the analysis of dynamic processes occurred in their units taking into account their elasto-inertial properties, power dissipation, gaps in kinematic pairs, friction forces, design and technological loads. As an example in the paper there are considered a formalization of stages in the computer model formation of the cutting mechanism in cold stamping automatic machine АV1818 and methods of for the computation of their parameters on the basis of its solid-state model.

Abstract.One of the urgent problems in mechanical engineering is development of efficient inexpensive thick-layered coatings for repair worn-out large-sized parts. To solve these problems a comparatively new method of electro-plating with simultaneous mechanical impact of a tool upon coating under formation is promising enough. In this paper there are considered the peculiarities of plating through this method of thick-layer electro-mechanical iron plating on medium carbon steel 30 and 38 ChN3MA, and the composition, structure and properties of coatings obtained are analyzed. Coatings were applied upon crank main journals made of steel 38ChN3MA and upon models imitating crank main journals made of steel 30. Micro-hardness of the coating obtained, roughness, a chemical composition and a structure were analyzed. The results of the investigations have shown that a more significant role in hardness increase is played not by a chemical composition of medium carbon steel upon which it is applied, but a preparation of the surface and the technology of coating and also an electrolyte composition. The structure of electro-mechanical plating is less defective, contains a value of detrimental impurities considerably lower of allowable values and has a satisfactory adhesion strength with a substrate. Problem definitionAt present one of the urgent problems in mechanical engineering is development of efficient and inexpensive heavy coatings for repair of worn large-sized parts [9,10,11]. Such coatings must have an increased thickness, good durability of adhesion with a basis, sufficient hardness and wear-resistance. In world practice the reduction of worn-out large-sized parts is carried out by retailoring [12,13,14], sputtering [15,16,17], cladding [18,19,20] and so on. But all these methods suppose an intensive thermal impact upon a part under reduction that results in hard-removable buckling and shrinkage.Therefore, more and more attention is paid to the process of galvano-mechanical metal deposition without temperature increase -flow-contact deposition of galvanoplatings with the mechanical activation of a cathode surface [5,6,7,8]. It is well-known that the mechanical effect upon a part in the course of galvanic deposition allows increasing the allowable current density, a deposition rate, micro-hardness, coating thickness and also improving the adhesion with a basis and decreasing residual stresses. Investigation procedure and equipmentThe considered in this paper off-bath method of the restoration through an electro-galvanic dry topping in a flowing electrolyte with the mechanical effect by a smoothing tool in the course of deposition is realized at small temperatures (40 -50 0 С). It prevents buckling and shrinkage in parts and ensures the required thickness (1.5 -1.8 mm), micro-hardness (600 -650 HV) and low roughness (Rа 1.25 -2.5 µm) stipulating for a small allowance for the further grinding of a layer restored. The method has small material and power expenses and a quick recoupment at the espense of the applicatio...

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At present a rapid development of additive technologies for the growth of metal and alloy products takes place. Each additive technology has its own rational field of application and its own characteristic set of advantages and disadvantages. The most promising technologies are new 3DMP-technologies of wire sedimentation/welding deposition by a method electric arc welding in combination with subtractive machining technologies (additive-subtractive technologies). The application of 3DMP-technologies in comparison with common and some powder technologies results in the considerable decrease of production costs and substantial increase of growth productivity, for them it is characteristic a high coefficient of initial material beneficial use. The advantage in use of additive-subtractive technologies (AST) consists in a possibility of the alternative use of additive and subtractive transitions at the formation of a part within the limits of one technological operation in a full compliance with the principle of community and constancy of technological bases. But AST peculiarity requires a complex solution of interrelated engineering and scientific problems including those in the field of design of products, material machining, engineering procedure automation and CAD systems. For instance, in consequence of that the realization of 3DMP-technology is possible only under conditions of complete process automation, in the presence of a subtractive module having 3-5 controlled coordinates, for the equipment on the whole the NC system is necessary which controls the execution unit displacement along six coordinate axes and more.