New long line rail

A new type of rail head technology, used in tracks, roads, buildings, etc., can solve the problems of economic waste, fatigue fracture, fatigue fracture of long core rails, etc., to achieve the effect of close fit, improve structural strength, and improve section strength.

Active Publication Date: 2005-03-02
CHINA RAILWAY BAOJI BRIDGE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 60kg / m rail No. 12 Type I (VZ200) movable core long core rail, the tip structure of the long core rail is: the end of the rail head tread is opposite to the end of the anti-jump platform, since the long core rail starts from the width of the rail head 20mm began to bear force, just forming a stress concentration, see attached image 3 and 4 , the phenomenon of fatigue fracture occurs during use, and its service life is less than one year. Figure 5 and 6
After the actual measurement and theoretical analysis: the high stress of the stressed section leads to fracture, so how to solve the fatigue fracture phenomenon caused by the stress concentration of the long center rail has become one of the technical problems that this technical field wants to solve but has not solved.

Method used

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  • New long line rail
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: with reference to attached figure 1 with 2 . 1. Measures and process steps: Process flow: blanking → sawing → machining of the press section of the conversion handle → hot forging of the conversion handle → hot forging of the anti-jump platform → normalizing → straightening → sawing head → heel heating Forging→Milling the contour of the transfer handle→Milling both sides of the transfer handle→Milling both sides of the anti-jump platform→Number hole→Drilling→Horizontal milling of the bottom of the side rail of the short leg→Horizontal milling of the bottom of the side rail of the long leg→Milling of the anti-jump surface Surface→CNC milling working side of long leg rail head→CNC milling short leg rail head working side→CNC milling top surface of rail→Heel-end profiled section rail top surface and both sides planing→planing short leg side closely with short core rail The side of the rail head of the pasting section → correct the processing deformation an...

Embodiment 2

[0013] Embodiment 2: On the basis of Embodiment 1, the end face of the rail head tread 3 lags behind the end of the anti-jump platform 1 at any point within the range of 100-1000mm.

Embodiment 3

[0014] Embodiment 3: On the basis of Embodiment 1, the end face of the rail head tread (3) lags behind any point within the range of 100-160 mm from the fulcrum in the anti-jump platform (1).

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Abstract

The present invention relates to the switch tongue structure of railway switch long core rail, and belongs to the field of railway switch manufacture technology. The long core rail has rail head tread with end surface lagging to the end of the hold-down stage. The present invention has the advantages of improved stress condition with 45 % lowered maximum stress and less stress concentration, raised cross section strength and long service life up to 8 years.

Description

Technical field: [0001] The invention relates to a tip structure of a long core rail of a railway turnout, which belongs to the field of railway turnout manufacturing. Background technique: [0002] 60kg / m rail No. 12 type I (VZ200) movable core long core rail, the tip structure of the long core rail is: the end of the rail head tread is opposite to the end of the anti-jump platform, since the long core rail starts from the width of the rail head 20mm Begin to bear force, just form the stress concentration, see attached image 3 with 4 , the phenomenon of fatigue fracture occurs during use, and its service life is less than one year. Figure 5 with 6 . After the actual measurement and theoretical analysis: the high stress of the stressed section leads to fracture, so how to solve the fatigue fracture phenomenon caused by the stress concentration of the long center rail has become one of the technical problems that the technical field wants to solve but has not solved. I...

Claims

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Application Information

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IPC IPC(8): E01B7/02
Inventor 刘皓车伟邹小魁李志龙
Owner CHINA RAILWAY BAOJI BRIDGE GRP
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