Abstract

Upsetting is a common method in the production of connectors, a new technology to avoid instability of long pipe under compression was taken in this paper, which would get the upsetting shape of long pipe by changing the length of deformation zone. Forming process was simulated by finite element, and some mechanisms of metal deformation and load were obtained. The simulation results showed that: instability was not occurred and one could have specified shape by using conical die upsetting only once. Then the upsetting experiment was conducted, the trail had a good match with simulation results, which expanded upsetting rules, and provided a reference for design of die.

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