METHOD OF RIVETING COMPOSITE STACKS Russian patent published in 1994 - IPC

FIELD: metal working. SUBSTANCE: cylindrical holes are made in parts of stack; holes in parts made of fibrous composite materials shall exceed diameter of the rivet shank. Bush made of homogeneous metal is inserted in hole of part made of fibrous composite material and is fixed at simultaneous forming of cylindrical depression at its end directed inside stack. Then stack is assembled. Parts of stack are fixed through shifting material of part made of homogeneous metal to cylindrical depression of bush in course of plastic compression of part in diameter exceeding diameter of depression. Backing ring whose diameter exceeds diameter of bush is fitted on rivet shank. Then rivet is inserted in hole of stack on side of part made of fibrous composite material. The point of rivet is formed through upsetting the portion of rivet shank projecting above stack. EFFECT: enhanced reliability. 6 dwg