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Larysa Hlembotska, Oleksandr Melnyk
Technology transfer: fundamental principles and innovative technical solutions , Volume 3, pp 52-54; doi:10.21303/2585-6847.2019.001027

Abstract: Importance of the use of titanic alloys is shown in many industries of engineer. Problems which arise at their processing are described that negatively affect process productivity and indicators of surface quality and etc. This is especially important when machining plane surfaces of parts by face milling. The surface roughness depends first of all on geometrical parameters and the shape of the cutting edge of the tool insert that contacts the processed surface. Therefore it was developed an original design of face mill with a stepped insert arrangement with a cylindrical front surface, and at the same time process productivity was improved.Expediency of use of the proposed design of a face mill it is proved by comparative experimental studies of influence of a form of a front surface of round inserts on roughness of the machined surface of parts from titanium alloy VT1-0. The comparison was made between the machining of the face mill with a cylindrical front insert surface and a standard face mill with round inserts (ISO 6462:2011). A non-composite second-order plan was received results of the study were obtained for the conditions of machining titanium alloy.The profile of the machined surface was investigated to evaluate the roughness Ra and it was determined that, with the maximum cutting modes, the face mill of the original design provided a lower roughness of the machined surface than a standard mill. The optimum cutting modes are determined by the criterion of the roughness of the machined surface of parts made of titanium alloy VT1-0 and the process productivity of face milling. The proposed face mill provides a 1.26 time increase in productivity compared to machining a standard face mill while obtaining minimal roughness.
Keywords: surface roughness / machining / Surface of Parts / made titanium / FACE MILL OF ORIGINAL

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