METHOD OF MAKING RING SHAPED COMPONENT PARTS Russian patent published in 2008 - IPC B21K1/38 B21K21/00 

FIELD: technological processes.

SUBSTANCE: invention pertains to plastic metal working and can be used in forging shops of metallurgy and machine building plants when making large machine parts, mainly from aluminium and magnesium alloys. A ring shaped semi-product is made from an ingot in two stages. The initial rough piece is obtained on the first preliminary stage by compressing the ingot. Compression is done on the switch to convex and concave panes. Convex and concave conical surfaces are formed on opposite sides of the compressed rough piece. Before each subsequent switch, the concave side of the compressed rough piece is laid on the concave side of the pane. A central hole is pierced into the compressed rough piece in the final stage. The rough piece is pierced in a closed press tool with calibration of the rough piece. The size of the ingot and the ring shaped semi-product are determined with consideration of the dimensions of the ring shaped parts from the given ratios. The obtained ring shaped semi-product undergoes expansion and thermal processing. As a result, there is satisfactory engineering of the whole volume of the ingot with obtaining optimum properties of the finished parts.

EFFECT: satisfactory engineering of the whole volume of the ingot with obtaining optimum properties of the finished.

3 dwg, 2 ex