METHOD OF RECOVERY OF MAIN SUPPORTS OF ENGINE BLOCKS Russian patent published in 2015 - IPC B23P6/00 B23H9/00 

FIELD: engines and pumps.

SUBSTANCE: according to the method the surface of worn-out main supports is coated by electrospark weld deposition and boring, and on worn-out main supports the combined two-layer coating is formed. The first electrospark layer is applied by non-rotating nichrome electrode with the cross-section 12-20 mm² in manual mode with the impulse energy 4.3-10 J, the pulse duration 1000-2000 mcs, the amplitude value of the pulse current 240-280 A and amount of working pulses per second 50-100. The second layer is formed by cold gas-dynamic dusting of aluminium-containing powder with subsequent boring of obtained combined coating and a honing of all main supports until obtaining the sizes with required geometrical accuracy.

EFFECT: invention allows to increase process productivity by change of modes of electrospark weld deposition and decrease of process time.

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