Machining method of tapered roller for rail transit

Abstract

The invention provides a machining method of a tapered roller for rail transit, which is characterized by comprising the following steps: cold heading and forming of a blank; heat treatment and removal of oxide skin; rough grinding of the outer diameter; rough grinding of double end surfaces; hardness detection; cut-in grinding of the outer surface; superfinishing of a spherical base surface; superfinishing of the outer diameter; demagnetizing, cleaning and drying; appearance detection; size detection grouping; and cleaning, rust prevention and packaging. Aiming at the defects in the prior art, the invention provides the machining method of the tapered roller for rail transit, the machining method can ensure that the dimensional precision and consistency of the tapered roller are at a higher level, and the tapered roller can have higher rotation precision and is low in noise and small in temperature rise when running in a bearing.

Description

technical field [0001] The invention relates to a method for processing tapered rollers for rail transit. Background technique [0002] A bearing is a bearing that mainly bears radial direction and can bear a certain axial force. It is common in various fields of our life and work. Among them, tapered roller bearings used in the field of rail transportation, compared with other fields , higher requirements on the service life, high-speed performance, impact resistance, load capacity, etc. of tapered roller bearings, which lead to higher precision of tapered roller bearings used in this field, especially in tapered roller bearings The tapered rollers used as rolling elements have poor consistency in dimensional accuracy, and the contour radian of the rolling surface cannot meet the requirements. This has led to the fact that only a small amount of tapered roller bearings produced in China are used in non-critical parts of trucks or passenger transport. Tapered roller bearing...

AI Technical Summary

Problems solved by technology

[0002] A bearing is a bearing that mainly bears radial direction and can bear a certain axial force. It is common in various fields of our life and work. Among them, tapered roller bearings used in the field of rail transportation, compared with other fields , higher requirements on the service life, high-speed performance, impact resistance, load capacity, etc. of tapered roller bearings, which lead to higher precision of tapered roller bearings used in this field, especially in tapered roller bearings The tapered rollers used as rolling elements have poor consistency in dimensional accuracy, and the contour radian of the rolling surface cannot meet the requirements. This has led to the fact that only a small amount of tapered roller bearings produced in China are used in non-critical parts of trucks or passenger transport. Tapered roller bearings used in key parts of rail transit are very dependent on foreign imports

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