Three-roller inclined rolling forming method of rail vehicle axles

A railway vehicle and axle technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of inconvenient production operation, difficult production, large investment, etc., and achieve low production cost, simple mold manufacturing, and surface distribution uniform effect
CN108296292AActive Publication Date: 2018-07-20NINGBO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO UNIV
Publication Date
2018-07-20

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Abstract

The invention discloses a three-roller inclined rolling forming method of rail vehicle axles. The method is characterized in that rods are heated and fed into a three-roller inclined rolling machine through an axial pushing device; three inclined rollers are engaged with the rods at the same time, and drive the rods to rotate; meanwhile, the axial pushing device pushes the rods to axially move ata constant speed; a radial driving mechanism controls radial movement of the inclined rollers according to diameter requirements of rail vehicle axles needing to be machined; when the rods axially move to contact with an axial guide device, the axial guide device tows the rods to continuously move axially at a constant speed; meanwhile, the rods are deviated from the axial pushing device; and after machining is finished, large-diameter long step shafts-rail vehicle axles are obtained. The method has the advantages of simple mold manufacturing, uniform distribution of force on the surfaces of rolled parts, capability of effectively reducing wear of the rollers in the inclined rolling process, capability of realizing light construction of the rolling machine and effective prolonging of the service life of the rolling machine.
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Description

technical field

[0001] The invention relates to the plastic forming processing of shaft parts, in particular to a three-roll cross-rolling forming method of railway vehicle axles. Background technique

[0002] The railway vehicle axle is one of the three key parts (heavy rail, axle and wheel) of railway construction, and belongs to super large axle parts. At present, the method of producing railway vehicle axles at home and abroad is mainly forging. Its production efficiency is 0.2-0.3 per minute, and the material utilization rate is 58-65%. Cross wedge rolling is currently a widely used forming method for shaft parts processing, and its material utilization rate and production efficiency are relatively high. However, the shaft parts produced by cross wedge rolling at home and abroad have a maximum diameter below φ150mm If the length is within 1200mm, the maximum diameter of the mold is φ1400mm; while the railway vehicle axle is a super-large long stepped shaft, its maximum...

Claims

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