METHOD OF MAKING FLAT BOTTOM IN TUBE BILLER WITH CENTRAL BORE OF REQUIRED DIAMETER

摘要

FIELD: process engineering. ^ SUBSTANCE: invention relates to metal forming. Tube billet wall is subjected to plastic strain by flat working surface of spinning tool moving along rolling arc to make a fillet and a flat bottom with central bore. Note here that flat bottom is made together with drilling central bore by cutting tool secured perpendicular to spinning tool working surface plane at a distance from tube billet outer wall plastic strain start with due allowance for fillet length and central bore diameter. ^ EFFECT: higher efficiency. ^ 2 dwg, 1 ex