DETERMINING RATIONAL MODES OF MECHANICAL PROCESSING OF TITANIUM BODY ELEMENTS OF OIL AND GAS EQUIPMENT BY END-END MACHINES (ACCORDING TO SS 23248-78) AND WAVE-SHAPED CUTTERS

Abstract

The relevance of the research is caused by the fact that one of the most important factors in the failure-free operation of oil and gas equipment is the corrosion resistance requirements. Titanium alloys properties like high corrosion resistance in corrosive environments and high strength combined with low density make it possible to obtain products with high strength and low weight when operating in corrosive environments. However, titanium alloys usage in the manufacture of details that operate in an aggressive environment, including for oil and gas equipment, is limited due to both low machinability and low thermal conductivity, as well as the technological system predisposition to intense fluctuations. Object: productivity and economic efficiency from using mills for manufacturing of hull details like «case» type from titanium alloy. The main aim of the research is a development of rational machining modes and tool geometry for milling hull elements from titanium alloys. That can ensure maximum tool life, machining quality, productivity and economic efficiency. Methods: production tests of mills with different geometry of cutting edges by the multifactor experiment method using a vibro-diagnostic complex for determine the minimum vibration level zones during machining of the «case» type part from titanium alloy. Results. The authors have developed the recommendations to reducing vibration during milling hull elements from titanium alloys. This method allows finding the rational cutting conditions according to both the highest productivity and maximum tool life criteria in production conditions during the stage of debugging the technological process.

Keywords

• oil and gas equipment
• titanium alloys
• milling
• end mills
• productivity
• machining quality
• vibration level
• vibrо-diagnostic complex
• tool life