DEVELOPMENT OF TECHNOLOGY FOR MANUFACTURING METAL-COMPOSITE BODIES OF PREFABRICATED DRILLS IN THE CONDITIONS OF IMPORT SUBSTITUTION

In the conditions of sanctions pressure and the need for import substitution, the task of reducing the cost of starting production of prefabricated drill bodiess is becoming particularly relevant. The paper objective is to reduce the cost of starting production of such a tool by introducing a new manufacturing technology. A comparative analysis of two production routes is carried out: a traditional subtractive method of mechanical processing and an innovative metal-composite method combining selective laser melting of a metal shell with subsequent vibro-vacuum filling of a metal polymer filler. It is shown that the combined metal-composite technology provides a number of design advantages that are unattainable with the classical approach, including the formation of conformal internal cooling channels and increased vibration resistance of the tool due to a damping polymer core. It is found out that the new technology significantly reduces initial costs in small-scale production of drill bodies, which confirms the expediency of its use in the conditions of import substitution.