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A forging method for the heel end of a rail and the three-station forming die it adopts

A molding die and three-station technology, which is applied in the direction of manufacturing tools, forging/pressing/hammer devices, forging/pressing/hammering machinery, etc., can solve the problems of increased resistance to metal deformation, large amount of deformed metal, and insufficient tonnage of equipment, etc. , to achieve the effect of reducing metal deformation resistance, improving quality and avoiding decarburization

Active Publication Date: 2017-01-18
CHINA RAILWAY CONSTR HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The equipment capacity of domestic turnout manufacturers is configured according to the forging and forming of the length of the existing rail heel forming section. The maximum tonnage of the existing rail heel forging and forming press is about 5000t. After the forming section is lengthened, if the whole is formed at one time, the mold cavity is vertical If it is not closed, there must be a material head at the end of the rail after forming. If the length of the forming section reaches 1050mm, the mold cavity must be greater than 1050mm and include the length of the material head. If the length of the mold is too long, the length of the formed rail is too long, and the deformed metal Large quantity, sharp increase in metal deformation resistance, insufficient tonnage of equipment

Method used

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  • A forging method for the heel end of a rail and the three-station forming die it adopts
  • A forging method for the heel end of a rail and the three-station forming die it adopts
  • A forging method for the heel end of a rail and the three-station forming die it adopts

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Embodiment 1

[0047] A rail heel product, see figure 1 , which includes a pre-forged heel end 01 and a final forged heel end 02. The pre-forged heel end 01 includes a first section 011, a second section 012, and a third section 013 connected in series in sequence. The length of the first section 011 is 100mm-200mm, the length of the second section 012 is 450-650mm, the length of the third section 013 is 150-200mm; the final forged heel end 02 includes the fourth section 021 and the fifth section 022 connected in series , and the fourth section 021 is connected to the third section 013, the length of the fourth section 021 is 400-600mm, the length of the fifth section 022 is 150-200mm, and the fifth section 022 is connected to the raw material segment 00;

[0048] The forging method for producing the above-mentioned rail heel specifically includes the following steps:

[0049] Step 1: Heat the first section 011, the second section 012 and the third section 013 to 1100-1160°C in an electric...

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Abstract

The first purpose of the invention is to provide a forging and pressing method of steel rail heel; a steel rail heel comprises a pre-forging heel and a final forging heel; the pre-forging heel comprises a first section, a second section, and a third section; the final forging heel comprises a fourth section and a fifth section; the method specifically comprises the following steps: implementing a first stage forging and pressing after heating the first section, the second section and the third section, wherein the first two sections are molded by forging and pressing, the third section is pre-deformed; and implementing a second stage forging and pressing after heating the last three sections. The provided forging and pressing method adopts a measure of molding twice, thereby being able to solve the defect that the size of the molded final forging heel is unqualified, as well as greatly reducing the molding force in the entire steel rail heel product molding process. The second purpose of the invention is to provide a three-position molding die with a simple integral structure; a second upper die section inside a pre-forging rail molding cavity and a first pre-forging insert inside a final forging molding cavity are both in detachable structures, thereby meeting different requirements to the three-position molding die in the twice forging and pressing process; the three-position molding die is convenient to be assembled, and strong in practicability.

Description

technical field [0001] The invention relates to the field of railway switch point rails, in particular to a forging method for the heel end of a rail and a three-station forming die adopted therefor. Background technique [0002] Domestic high-speed, speed-up and most normal-speed railway turnout point rails are made of asymmetric cross-section rails, and the connection with the standard rail of the railway line requires the connecting section to be processed into a standard rail shape, thus producing asymmetric cross-section rail hot die forging point rails. Finally, the asymmetric section rail is forged into a 150mm long transition section and a 450mm long standard section rail. [0003] Seamless track is an important new technology in today's track structure. The heel of the switch rail of the seamless line is connected to the guide rail by welding. Due to the limitation of the current technological level in the design, the welding position of the heel of the switch rail...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02B21J13/02
Inventor 何文超盘国壬罗震
Owner CHINA RAILWAY CONSTR HEAVY IND
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