A method for two-way combined rolling forming of gcr15 steel thin-walled deep-tube rings

Abstract

Disclosed is a bidirectional combined rolling forming method for a GCr15 steel thin-wall deep barrel ring piece. The bidirectional combined rolling forming method for the GCr15 steel thin-wall deep barrel ring piece includes the steps that firstly, the material attribute of the thin-wall deep barrel ring piece product is determined as GCr15 steel, the geometric dimension value of the thin-wall deep barrel ring piece product is also determined, and it is determined that a workblank and a mandrel in the bidirectional combined rolling process of the ring piece are a rectangular-section workblank and a rectangular-section mandrel respectively; secondly, the geometric dimension value of the rectangular-section workblank is worked out according to the determined rolling ratio and the deformation amount distribution ratio, and a GCr15 steel rectangular-section workblank is machined and manufactured based on the geometric dimension value; thirdly, the GCr15 steel rectangular-section workblank is put into a heating furnace to be heated, taken out when the temperature reaches 1150+ / -30 DEG C and then put into a bidirectional combined rolling machine for bidirectional combined rolling, the plastic deformation that the radial wall thickness is reduced, the axial height is increased and the inner and outer radiuses are expanded is generated, and the GCr15 steel thin-wall deep barrel ring piece product is formed. The bidirectional combined rolling forming method for the GCr15 steel thin-wall deep barrel ring piece can effectively improve the production efficiency of the GCr15 steel thin-wall deep barrel ring piece product, shorten the production time and reduce the product cost, and is favorable for further development of the ring piece rolling accurate plastic forming and manufacturing technology.

Description

technical field [0001] The invention belongs to the technical field of precision plastic forming manufacturing of ring parts rolling, and in particular relates to a method for two-way joint rolling forming of GCr15 steel thin-walled deep tube ring parts. Background technique [0002] Thin-walled deep-tube rings are widely used in equipment such as high-neck flanges and high-pressure barrel valves in aerospace, energy, automobile, shipbuilding, chemical and other industrial fields. It not only requires high precision, but also requires good performance. The traditional manufacturing process of thin-walled deep tube rings is mechanical processing and horse frame hole reaming process, but they have disadvantages such as large deformation resistance, large energy and material consumption, and large amount of subsequent machining. [0003] As an advanced plastic forming technology, the two-way joint rolling of ring parts has the advantages of good product performance, high mater...

AI Technical Summary

Problems solved by technology

However, in these two invention patents, although the two-way joint rolling technology of the ring is used, the radial rolling is carried out first in the forming manufacturing process (that is, the wall thickness of the ring is reduced, the axial height is unchanged, and the inner and outer radii Expand) and then perform axial rolling (that is, the wall thickness of the ring is reduced, the axial height is increased, and the inner and outer radii remain unchanged), this method fails to give full play to the advantages of the two-way joint rolling of the ring

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