Improving a technique for producing hemispherical semi-finished shells made of hard-to-deform titanium alloys for high-pressure vessels used in special engineering products

The paper analyzes the existing techniques for producing hemispherical shells from hard-to-machine materials. It discusses the advantages and the drawbacks of the presented techniques, tools and fixtures. It proposes a promising technique for producing hemispherical semi-finished shells from hard-to-deform titanium alloys for high-pressure vessels that was introduced into production process in our country’s engineering industry. It provides results of experimental studies into manufacturing of titanium hemispheres using the rotary drawing technique that were conducted at JSC KBKhA. The produced semi-finished shells were subjected to metallographic inspection. The paper outlines ways to achieve optimal technical characteristics and the high level of reliability required of special engineering products made of titanium alloys. The obtained results make it possible to significantly expand technological capabilities of production, as well as to considerably improve technical characteristics of special hardware products in the engineering industry.