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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

Active Publication Date: 2018-07-20
NINGBO UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the current cross-wedge rolling method is used to produce railway vehicle axles, the diameter of the die will reach about φ3000mm, and the height of the cross-wedge rolling machine will exceed 9000mm. Such a large machine and die will inevitably require large investment, difficult production, and inconvenient production and operation, so it is impossible implement

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  • Three-roller inclined rolling forming method of rail vehicle axles
  • Three-roller inclined rolling forming method of rail vehicle axles
  • Three-roller inclined rolling forming method of rail vehicle axles

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] As shown in the figure, a three-roll skew rolling forming method of a railway vehicle axle comprises the following specific steps:

[0021] (1) Set the radial drive mechanism (not shown in the figure) of the skew rolling roll 1 on the three-roll skew rolling mill, and control the synchronous radial movement of the three skew rolling rolls 1;

[0022] (2) An axial pushing device 2 is arranged on the feed side of the three-roll cross rolling mill, and an axial feeding device 3 is arranged on the discharge side of the three-roll cross rolling mill;

[0023] (3) Heat the bar 4 to 1000°C-1200°C, and send the bar 4 into the three-roll cross-rolling machine through the axial pushing device 2, and the three cross-rolling rolls 1 bite the bar 4 at the same time, and drive the bar The material 4 rotates, and at the same time, the axial pushing d...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B19/04B21B39/06
CPCB21B19/04B21B39/06
Inventor 束学道许畅李子轩彭文飞孙宝寿殷安民王英李淑欣
Owner NINGBO UNIV
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