New technology and essentials in die design for upsetting drill key on a universal press was introduced.

This article has described and analyzed the several upsetting forging methods of large-middle size continuous grain flow crankshaft in detail,and presented the advantages and disadvantages of different methods,meanwhile the development direction of the forging method for the large-middle size continuous grain flow crankshaft has been set forward as well.

The influences of tube dimension and interface friction on the material flow and the cause of forming defect in the flange forming process by upsetting forging tube are analyzed.

The advanced technology for producing these kind of forgings which are similar to full fi-bers crankshaft forging on a general forging press is upsetting and offsetting operation.

Comparting fatigue tests on TR upsetting and open die forging,this paper finds that the fatigue strength of the TR upsetting crankshaft is 16 — 22 percent higher than that of the open die forging crankshaft.

When the ratio of upsetting of tubular blank was very large, the ring valley formed at inner wall and the fold formed at last.

Simulation and optimization of the upset forging process of tube parts;

Research on the upset forging technology of large full fiber crankshaft;

The mechanical analysis and the upset forging simulating experiment with 1∶7.