DEVICE FOR ROLLING SCREWS WITH ROUNDED CROSS PROFILE Russian patent published in 2008 - IPC B24B39/04 

FIELD: technological processes.

SUBSTANCE: device has case with three deformation instruments, helical cylindrical spring, holders, two posts, compression springs and columns. The cylindrical spring is made with spacing which is a multiple of the thread of the processed screw and is wrapped around the latter. The holders are mounted inside the helical cylindrical spring at a distance equal to the thread of the processed screw. The two posts have openings and are in a case. One of the above mentioned posts can be moved, while the other is immovable. The columns rest on the compression spring and are put inside the openings in the posts. The deformation instruments are fixed to the holders. The ends of the cylindrical spring are fixed to the columns. The middle deformation instrument is mounted at the opposite extreme deformation instrument relative the processed work piece and is made with provision for radial movement for regulating tightness and rolling force.

EFFECT: more technological capabilities, reduction of roughness parameter of processed surface and increase in hardness of latter.

3 dwg, 1 ex