Symmetric rolling forming method of large inner-step ring parts

Abstract

The invention relates to a symmetric rolling forming method of large inner-step ring parts, mainly comprising the following steps of: (1) blanking, upsetting, punching, punching the wad, and preparing a ring part blank used for rolling, wherein the size of the ring part blank is determined by the size of the ring part, a rolling ratio, and a radial feed / axial feed ratio; (2) designing a rolling groove, wherein the rolling groove is composed of a driven roller working surface and a core roller working surface and sizes of the driven roller working surface and the core roller working surface are determined by a rolling linear speed, equipment parameters, rolling deformation conditions, the ring part blank size, and the ring part size; (3) rolling forming which comprises placing the well-prepared ring part blank on a ring rolling machine and controlling the rolling process in a way that the feed speed and the feed amount are reasonably distributed according to three stages of pre-rolling, main rolling, and shaping rolling, and ending the rolling process when an outer diameter of the tested ring part achieves a predetermined value; and (4) machining cutting which comprises placing the well-rolled ring part on a sawing machine and cutting the ring part into two required inner-step ring parts from a high portion in the middle. The symmetric rolling forming method provided by the invention has the characteristics of good production stability, high efficiency, and high product performance.

Description

technical field [0001] The invention relates to a symmetrical rolling forming method of a large inner stepped ring. Background technique [0002] Large-scale inner stepped rings with a diameter of more than 1 meter and deep steps on the inner surface are widely used in construction machinery, wind power generation, petrochemical and other industrial fields for large machinery as connections, slewing support rings, bearing rings, gas turbine rings, etc. equipped. Such rings have harsh service conditions and have been subjected to extreme working conditions such as heavy loads, high impacts, and high pressures for a long time, and have high requirements for their performance. The traditional manufacturing process of large inner step rings is free forging-hole reaming-machine cutting, that is, first free forging to make a billet, then mandrel reaming, and finally machining the inner step cross-sectional profile by machine cutting. Mandrel reaming has low efficiency, poor prec...

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies, the purpose of the present invention is to provide a symmetrical rolling forming method for two large inner stepped rings, by rationally designing the rolling blanks, pass types and process parameters, one-time symmetry can be realized from the rectangular cross-section ring blanks. Two large inner stepped rings are formed by rolling, which solves various defects caused by deformation asymmetry in the rolling of a single ring, significantly improves production efficiency and product quality, reduces production costs, and can achieve stable mass production

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