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Production Technology of High Precision Bearing Roller for Rail Transit

A technology for bearing rollers and rail transportation, applied in the field of bearing roller processing

Active Publication Date: 2021-05-14
JIANGSU LIXING GENERAL STEEL BALL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the bearings produced by domestic bearing enterprises can only meet the needs of trains with a speed of 150-180 kilometers per hour, while high-speed rail bearings in a few developed countries in Europe and the United States can meet the needs of trains with a speed of 350-400 kilometers per hour.

Method used

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  • Production Technology of High Precision Bearing Roller for Rail Transit

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Refer to attached figure 1 , the specific steps of the production process of high-precision bearing rollers for rail transit:

[0038] 1. Cold heading: use a four-station high-speed cold heading machine to draw the steel and press it into a roller blank.

[0039] 2. Heat treatment: heat treatment is to complete the quenching and tempering treatment of the cold heading roller blank in the solid range through certain heating, heat preservation and cooling, cleaning assistance, etc. to change its structure and performance, and obtain product characteristic requirements a key process. The heat treatment of the project adopts a fully automatic mesh belt furnace heat treatment production line.

[0040] 3. Hard grinding 1: Grinding the outer diameter of the roller, removing part of the grinding amount, so that the raceway surface of the roller meets the process size requirements, and lays the foundation for the geometric accuracy of the subsequent hard grinding 2 and hard gr...

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Abstract

The invention relates to a production process of high-precision bearing rollers for rail transit. Step 1, cold heading: use a four-station high-speed cold heading machine to draw steel materials and then press them into roller blanks. 2. Heat treatment: Heat treatment is a fully automatic mesh belt furnace heat treatment production line. 3. Hard grinding 1; 4. Hard grinding 2; 5. Ball base surface; 6. Hard grinding 3; 7. Superfinishing: The superfinishing process uses 8 pieces of oil stone to vibrate back and forth to process the raceway surface of the roller ;8. Eddy current flaw detection: This process adopts the eddy current flaw detection equipment produced by IBG in Germany. crack. 9. Packaging. The advantages of the present invention are that through multiple molding at four stations, not only the molding precision of the product can be ensured, but also the metal flow direction of the material can be made more reasonable and the service life of the product can be improved.

Description

technical field [0001] The invention relates to the field of bearing roller processing, in particular to a production process of high-precision bearing rollers for rail transit. Background technique [0002] Bearing is the most important, critical and core basic component in high-speed rail equipment. It is known as the "heart" of equipment manufacturing and directly determines the performance, quality and reliability of high-speed rail mainframe products, and the bearing industry is a national basic strategy. sex industry, which plays an important supporting role in national economic development and national defense modernization. As the world's third largest bearing manufacturer, my country's bearing industry has formed a large economic scale. According to statistics in 2016, the main business income of my country's bearing industry was 164.9 billion yuan, and the bearing output exceeded 20 billion sets. my country's bearing demand accounts for more than 26% of the total ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 苏银建江亚东郭凡钢
Owner JIANGSU LIXING GENERAL STEEL BALL
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