APPARATUS FOR RELEASING STRESSES IN WELDED JOINTS OF CARRYING STRUCTURES OF MACHINES AND FOR INCREASING THEIR STRENGTH Russian patent published in 1999 - IPC

FIELD: welded joint treatment. SUBSTANCE: apparatus includes housing with percussion action drive unit for reciprocation motion. Drive unit is connected with striker block. Adjacent strikers of block are arranged without mutual lateral contact with possibility of separate motion of each striker. Ratio of rounding radius of working end of each striker to its cross section radius or radius of circle described around its cross section is 2-10. Ratio of area of cross section of striker block to area of cross section of striker is no less than 7. Maximum distance between strikers of block is no more than 0.2 of radius of striker cross section or radius of circle described around its cross section. EFFECT: enhanced efficiency of apparatus, optimization of working time period, high quality of welded joint treatment. 2 dwg