DEVICE FOR APPLYING COATINGS TO INTERIOR SURFACES OF PARTS Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: two halves 25 and 26 of part are filled with hard-alloy metal powder 24 and are inserted in semi-spherical recess 4 provided in housing 3. Housing 3 is covered by half-housing 2 and the both halves are clamped together by screws 8 and 9. Drive motor 17 is then switched, positive pressure is applied to hole 19 and HF current inductor 1 is actuated. The positive pressure is chosen in such a way that the rotary speed of the composite housing (half-housings 2 and 3) around axis O″O″ is equal to the rotary speed on the housing around axis O′O′,, i. e. this speed is equal to the rpm of lathe chuck 17 around the axis O′O′. The housing (half-housing 2, 3) rotates around axis O″O″ due to delivering air jets to the blades of impellers 10 and 11 through central hole 19 and L- shaped holes 20 and 21 provided in fork 16. As a result of effect of centrifugal forces and heating metal coating in the form of sphere is formed on the interior surface of parts which is limited by dotted line 27. EFFECT: extended operating capabilities. 1 dwg