ENSURING OF ACCURACY DURING PROCESSING OF HEAVY MACHINERY OBJECTS WITH PORTABLE MACHINES

The main layout features of portable machines with stationary machines of various groups are analyzed. The prospects and market trends for the growth in this class's equipment use in solving the problems of repair and modernization of various objects of heavy and power engineering, as well as in conventional engineering production, have been established. The main reasons that affect the accuracy of surface shaping during processing by portable machines are established, both from the side of the layout structure of the equipment and from the technological parameters of the shaping process. The issues of the relationship of layout solutions with basing a portable machine on the processing object and the kinematic scheme of shaping are considered. Based on this relationship, the factors affecting the accuracy of shaping were established and analyzed, which formed the basis of the proposed method for controlling accuracy at the early stages of creating portable machines, namely through the use of an aggregate-modular principle of equipment layout at the design stage of portable machines. This approach emphasizes the compliance of the proposed methodology with three modern concepts for the development of industrial production, namely, the widespread use of mechatronic systems, product lifecycle management through CALS technologies, and an integrated approach to creating technological systems through information technologies that form the basis of Industry 4.0. Based on the conducted research, a method for designing portable machine tools is proposed that provides control over the accuracy of processing, the layout of which is based on the aggregate-modular principle using the certification of technological modules. Keywords: mechanical processing, portable machine tools, layout, aggregate-modular principle, design, accuracy