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Wedge transverse rolling precision-forming method of hollow wheel axle blank of train

A train axle and precision forming technology, applied to locomotives, connecting rod bearings, shafts and bearings, etc., can solve the problems of difficult mold manufacturing and huge machinery and equipment, and achieve the effect of reducing the diameter of the roll body and saving the roll surface of the mold

Inactive Publication Date: 2006-09-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a multi-wedge precision forming method for hollow train axle blanks by cross-wedge rolling, which solves the problems of huge machinery and equipment and difficulty in making molds, and realizes the production of hollow train axle blanks by cross-wedge rolling

Method used

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  • Wedge transverse rolling precision-forming method of hollow wheel axle blank of train
  • Wedge transverse rolling precision-forming method of hollow wheel axle blank of train
  • Wedge transverse rolling precision-forming method of hollow wheel axle blank of train

Examples

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Embodiment Construction

[0019] Figure 4 , Figure 5 , Figure 6 And Fig. 7 is an embodiment of forming the hollow train RD2 axle. The hollow train RD2 axle seamless steel pipe blank with a diameter of Φ=203mm, a length of 1428mm, and a wall thickness of δ=50mm is heated at 1050°C and fed through the axial direction. The device is fed into two co-rotating 3 pairs of wedge hollow train RD2 axle molds for rolling. The maximum diameter of the mold is φ1700mm. The mold diagram is Figure 4 , the expanded picture is Figure 5 , hollow train RD2 axle rolled products such as Figure 6 As shown, will Figure 6 The hollow train axle is finished, and the finished hollow RD2 train axle is shown in Figure 7.

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Abstract

The present invention provides a hollow train axle shaft blank wedge cross-rolling precision forming method. On the large wedge cross-rolling special-purpose rolling mill the multiwedge mould with 3-5 pairs of wedges can be mounted for rolling said blank. The seamless steel pipe can be heated to 1000-1200 deg.C, then fed into the between of two equidirectionally-rotated multiwedge moulds with 3-5 pairs of wedges by means of arial feeding device for making rolling.

Description

technical field [0001] The invention belongs to the technical field of plastic forming of shaft parts, and in particular provides a hollow train axle blank cross-wedge rolling multi-wedge precision forming method, which is suitable for rolling and forming super large hollow shaft parts with a diameter of Φ180 mm or more and a length of more than 2 meters. . Background technique [0002] The train axle is one of the three key parts (heavy rail, axle and wheel) of railway construction, which belongs to super large axle parts. In order to realize the high-speed train, it is required to reduce the weight of the train itself, and one of the effective measures is to make the train axle hollow. [0003] There are two basic methods for the manufacturing process of the hollow train axle: 1) after the axle shape is made by forging, the inner hole is drawn out by cutting; 2) the shape is punched out on the precision forging machine with seamless steel pipe. [0004] At present, there...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21H1/18B61C17/10F16C7/00F16C9/04
Inventor 胡正寰张康生束学道邢希东李玉京
Owner UNIV OF SCI & TECH BEIJING