DEVICE FOR ON MANDREL TUBE FORGING Russian patent published in 2008 - IPC B21J5/00 B21J13/00 

FIELD: metallurgy.

SUBSTANCE: device contains forging machine, mechanism for conveying tube stock into deformation site and mandrel. The mandrel is installed at the front end of a mandrel holder in kind of a rod. The rod is secured in the stationary bracket and is designed to axially travel. The end of the rod, backward of the mandrel travel, is located behind the bracket and has threaded and flat parts. Adjusting components are arranged on the threaded part. A cylinder spring and a block of disk springs are successively arranged on the flat part; at that the block of the disk springs thrusts into the stationary bracket. Rigidity of the disk springs exceeds that of the cylinder spring. Besides, a cylinder cartridge, enveloping the cylinder spring, is placed on the flat part; the said cartridge is situated between the adjusting components and the block of the disk springs. The thrust, adjusted along the axis of the rod, is installed on the part of the rod before the stationary bracket. A cylinder compression spring is installed between the thrust and the stationary bracket.

EFFECT: upgraded efficiency of forging process and quality of fabricated items.

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