RATIONAL PARAMETER EXPERIMENTAL DEFINITION OF ELEMENTS FOR JET FORMING PATH OF PLANT FOR UNDERWATER MATERIAL HYDROABRASIVE-JET CUTTING
A possibility for the creation of a design and technology for manufacturing focal tubes for underwa-ter material hydro-abrasive jet cutting by means of ex-perimental development both existing hydro-jet nozzles and pre-production models of hydro-jet ones, focal tubes and designs of cutting blocks is analyzed. According to the research results at the given stage it is possible to say that the inner profile of a hy-dro-jet nozzle and also a cutting block design optimum from the point of view of productivity are defined. Impossibility to use already existing focal tubes used in the technology of material hydro-abrasive jet cutting for the technology of underwater hydro-abrasive jet cutting (UHAC) in view of the non-assurance of the specified power parameters of a hy-dro-abrasive jet is revealed. There is developed a me-thodical plan for the fulfillment of investigations pro-viding searches of ways to fulfill requirements made to UHAC.