METHOD OF MANUFACTURE OF THREADED BUSHING Russian patent published in 2007 - IPC F16B37/12 B23G1/00 B23G9/00 

FIELD: mechanical engineering.

SUBSTANCE: according to proposed method of manufacture of threaded bushing with inner and outer thread, blank is clamped in chuck of turning lathe and end face is cut. Then hole is bored in blank and inner thread is cut, dummy threaded plug with threaded part projecting beyond end face is turned to stop into threaded hole. Then outer surface is turned for cutting of outer thread, groove is cut for top of single-point threading tool, form thread cutting tool is driven into thread profile of dummy plug at a distance of not less than three pitches of thread from end face, and tool is positioned over entire profile of plug thread. Then mechanical coupling of carriage group and spindle of lathe is adjusted for cutting outer thread and after positioning, threading tool is shifted crosswise to bring it out of thread profile of dummy plug through distance providing required depth of outer thread cutting at first pass, outer thread is cut and preset number of working passes of tool threading to form outer thread of required profile are carried out. Then lathe is stopped, dummy threaded plug is turned out, threaded bushing is cut off from blank base and splines are milled.

EFFECT: provision of minimum thickness of bushing wall.

8 dwg