FIELD: technological processes.
SUBSTANCE: invention relates to metal forming and can be used in various fields of machine building for production of connecting parts (angle staffs) of welded pipelines, in particular for high pressure liquid and gas pipeline systems, to which there are high reliability requirements, especially in pneumatic and hydraulic systems of rocket and space equipment. Method of making a steeply bent angle staff using a hydroforming method provides a sealed connection between a punch of a cake and a tubular billet through a process pipe element, attached to tube billet by welding with wall thickness equal to thickness of tubular billet and having a number of internal annular projections with height of not less than one and a half thickness of tubular billet wall, width and distance between projections of less than one thickness. Process tubular element is connected to tube billet by welding.
EFFECT: higher quality of the finished product.
1 cl, 1 dwg
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