Design method of middle blank and prefabricating blank during conical shell forgeable piece forming process
A conical cylinder and forming process technology, applied in the field of forging, can solve the problems of reducing the machining allowance of conical cylinder forgings, the accuracy of machining dimensions cannot be guaranteed, and shortening the production cycle of products, so as to reduce research costs and shorten the production cycle , The effect of shortening the product production cycle
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[0114] The forged part in this embodiment is a pilot test forging of a conical cylinder of a certain type of nuclear power evaporator, and the inner diameter of the large end of the final forging is required to be r 2 =815mm, outer diameter R 2 =1000mm, wall thickness t 2 =185mm, height H 2 =1350mm, taper θ 2 = 11.1°. take k 1 =1.07,k 2 = 1.05, δ = 1.65.
[0115] In the process of reaming from the intermediate billet to the final forging, it can be obtained from the formula (4):
[0116] h 1 =H 2 / k 2 =1350 / 1.05=1286mm
[0117] From formula (12):
[0118] t 1 =δ·t 2 =1.65×185=305mm
[0119] From the formula (6):
[0120] R 1 = t 1 2 + k 2 ( 2 R 2 t ...
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