Method for layout of four rollers facilitating ultra-large-ring rolling stable forming

Abstract

The invention discloses a method for layout of four rollers facilitating ultra-large-ring rolling stable forming. The sizes of a roller and a ring blank and rolling force provided by a device are acquired, so that layout of the four rollers for facilitating forming stability can be determined. According to determined layout of the four rollers, instability of rolling process caused by separation of the ring blank and the roller can be effectively prevented, bending moment applied onto the integrated ring blank can be more uniformly distributed, stress of the ring blank is more easily balancedin the rolling process, a ring rolling state is more stable, excessive distortion of the ring blank caused by unreasonable layout of the rollers under the over-constrained condition is prevented, themethod breaks through a technical bottleneck of instability of the ring blank caused by the unreasonable layout of the rollers under the over-constrained, and a technical support is provided for development of ultra-large-ring bi-directional rolling devices of the four rollers. According to the method, the rolling success rate of an ultra-large ring is increased, production period is shortened, and the method has the advantages of convenience, accuracy and high efficiency.

Description

technical field [0001] The invention relates to the field of rolling and forming processing of rings, and relates to a method for the layout of four holding rolls which is beneficial to the stable rolling and forming of super large rings. Background technique [0002] High-performance ultra-large rings are widely used in aerospace, nuclear power, wind power and other fields, especially aluminum alloy super-large rings, as the basic components of aerospace heavy-duty launch vehicle fuel storage tanks, have major strategic needs in my country's space station construction, moon landing projects and Mars exploration projects (Guo Lianggang, Wang Fengqi, Liang Lei, et al. New ideas and research progress in intelligent simulation optimization of high-performance ring rolling forming [J]. Precision Forming Engineering, 2017, 9(4): 1-11.). The super large ring refers to the diameter rings. However, due to the large size and weight of the ring billet and the great inertia of the tw...

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Problems solved by technology

[0003] In order to overcome the deficiency in the prior art that the ring billet is unstable under over-constrained conditions due to the unreasonable layout of t

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