BOLT TIGHTENING METHOD AND DEVICE FOR BOLT TIGHTENING Russian patent published in 2009 - IPC B25B23/14 B23P19/06 

FIELD: mechanical engineering.

SUBSTANCE: according to bolt tightening method it is deliberately shifted surface pressure of threaded surface and bearing area of bolt, created at bolt tightening, by means of transferring of transverse load, parallel to bearing area of bolt, bolt head. In that condition it is imparted rotative moment, rotating outside thread, bolt head for bolt tightening. Device for bolt tightening contains communication means of tightening rotative moment for transferring of rotative moment, rotating outside thread, to bolt head and communicating means of transverse load for transferring of transverse load parallel to bearing area of bolt to the head of bolt so, that deliberately shift surface pressures of threaded surface and bearing area of bolt, created at rotation of rotation of outer thread by means of communication of threaded torsional moment.

EFFECT: consequently it is prevented slippage of bind parts without application of thread by stabiliser of friction factor.

8 cl, 13 dwg