Method for ring rolling forming of groove inclined inner hole ring part

Abstract

The invention relates to a method for ring rolling forming of a groove inclined inner hole ring part and belongs to the technical field of ring part ring rolling forming. The method is characterized by comprising the following steps: 1) determining a ring rolling ratio lambda; 2) according to the ring part dimension, ring rolling ratio and volume invariability principle, determining rectangular cross-section blank dimensions including the external diameter D0, the internal diameter d0 and the height H0; 3) performing ring rolling roll pass design: according to the dimensional structure and deformation conditions of blank and the ring part, designing working face cavity dimensions of a driving roller and a core roller; 4) determining ring rolling process parameters including the rotating speed of the driving roller, the feeding speed of the core roller, the initial ring rolling temperature and ring rolling finishing temperature; 5) performing ring rolling forming: according to the design parameters, through continuous multi-pass deformation on a closed type ring rolling machine, making the diameter of ring blank be expanded continuously and causing an inclined inner hole and the cross-section of a groove to undergo ring rolling forming. The method has the advantages that the groove inclined inner hole ring part is stable in the ring rolling process, the process parameter design is rational, the ring part is accurate in outline dimension and good in performance quality, the ring rolling finished product rate is high, and energy and material waste is low.

Description

technical field [0001] The invention belongs to the technical field of rolling and forming of ring parts, and in particular relates to a method for rolling and forming of ring parts with oblique inner holes in grooves. Background technique [0002] Groove rings refer to special-shaped rings with grooves on the outer surface or inner surface (the groove depth accounts for more than one-fifth of the wall thickness), figure 1 The depth of the groove of the ring shown is one-half of the wall thickness, and the inner hole and the upper and lower inner walls of the groove have a certain slope, and the shape and size are complicated. Key basic parts such as double-sided roller bodies, concrete mixer truck support guide rails, double-sided flanges and high-pressure ball valve bodies commonly used in engineering fields are all grooved ring parts, which have high requirements for dimensional accuracy, performance quality and organizational stability. The groove of this type of ring i...

AI Technical Summary

Problems solved by technology

The groove of this type of ring is difficult to be directly formed by die forging. Usually, a simple preform is formed by die forging first, and then the size of the groove is machined by machining, but this will cause the circumferential metal fiber streamline of the ring to be in the cutting process. The medium is destroyed, the tissue performance deteriorates, the production efficiency is low, and the material waste is serious

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