TUMBLING UNIT Russian patent published in 2002 - IPC

FIELD: finishing-cleaning and strengthening treatment of parts in free granulated medium. SUBSTANCE: invention can be used in mechanical engineering for dimensionless treatment of parts. Tumbling unit includes drum produced in the form of broken tunnel of spiral shape with rectangular flow section. Each section of tumbling unit is assembled from large and small rectangles and two equal trapezia. Their lower bases are equal to side of large rectangle and their small bases are equal to side of small rectangle. Other two free sides of rectangles are equal to sides of trapezia and form squares over butts of sections equally inclined to different sides towards axis of sections. Square of each joined section is turned through angle of 90 deg with regard to square of preceding section. Axis of each section and rotation axis of drum do not cross. With movement of parts and working medium along drum their mixing and spatial motion intensify which makes it feasible to expand technological capabilities of tumbling unit. EFFECT: expanded technological capabilities of tumbling unit. 9 dwg