DEVICE FOR FINISH MACHINING Russian patent published in 2011 - IPC B24B29/00 B23G9/00 

FIELD: technological processes.

SUBSTANCE: invention refers to a machine-building technology in the field of diamond-abrasive treatment and may be used for finishing treatment of shafts with a complicated shape surface, helical surfaces of accurate screws, for instance, screws in screw pumps, from hard-to-polish materials by method of enclosing polishing. The device uses a tool in the form of a toroid-shape elastic shell with a diamond-abrasive layer at the inner surface, enclosing the stock. The shell is installed in a body and has a nozzle with a nipple to supply compressed air that puts the shell into the working condition. The body is made in the form of a stator of inbuilt design of a three-phase asynchronous shorted electric motor with poles. Inside the stator there is a rotor mounted as a hollow shaft in rolling bearings. In its hole there is the specified toroid-shape fixed with the help of a nut screwed into at the end into the threaded part of the rotor. The nipple has a check valve to retain pressure of compressed air pumped into shell.

EFFECT: increased quality, efficiency and accuracy of treatment by damping, smoothening of shocks and automatic orientation of the stock by means of an elastic shell of this design.

5 dwg, 1 ex