Production process for high-precision bearing roller for rail transit

Abstract

The invention relates to a production process for a high-precision bearing roller for rail transit. The production process comprises the following steps of step 1, cold heading: after drawing steel byutilizing a four-station high-speed cold header, upsetting the drawn steel into a roller blank; 2, heat treatment which is a full-automatic mesh belt furnace heat treatment flow production line; 3, hard grinding 1; 4, hard grinding 2; 5, ball base surface processing; 6, hard grinding 3; 7, superfinishing, in which 8 oilstones are adopted to perform vibration back and forth to process a raceway surface of a roller; 8, eddy current inspection, in which eddy current inspection equipment produced by German IBG is adopted and is installed on a superfinishing machine to realize unfolding of the roller so as to perform 100 percent eddy current inspection which is mainly used for detecting defects on the surface of the roller and cracks of internal tissues of the roller; and 9, packaging. The production process has the advantages that through four-station multi-formation, the forming precision of a product can be guaranteed, a metal flow direction of a material can tend to be reasonable at the same time, and the service life of the product is prolonged.

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 ...

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.

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