Method for machining crown of outer ring raceway of tapered roller bearing through non-numerical-control internal grinder

Abstract

Disclosed is a method for machining a crown of an outer ring raceway of a tapered roller bearing through a non-numerical-control internal grinder. According to the method, an electric spindle is slightly uplifted by adjusting a spindle adjusting bolt installed on a base of a grinding wheel; when a diamond pen of a trimmer operates from the point A at one end of the grinding wheel to the point B of the other end of the grinding wheel, as a small spatial included angle theta exists between the trimming track AB and the center line of the grinding wheel, the outline of the grinding wheel is trimmed into a smooth hyperbolic curve; then a horizontal adjusting bolt is adjusted to enable the hyperbolic curve to be symmetrical, and then the trimmed outline of the grinding wheel is in a smooth and symmetrical hyperbolic curve type. The position relation between the trimming track AB and the center line of the grinding wheel is changed, namely the small spatial included angle theta is made to exist between the trimming track AB and the center line of the grinding wheel, and accordingly the internal grinder without the crown machining capacity has the capacity of machining the crown.

Description

Technical field: [0001] The invention relates to the technical field of bearing production, in particular to a method for processing the convexity of the raceway of the outer ring of a tapered roller bearing on a non-numerical-controlled internal grinding machine. Background technique [0002] The crown of a tapered roller bearing is an important factor affecting the fatigue life of the bearing. With the emergence of CNC crown grinding machines, crown processing technology has been fully popularized in the industry. However, non-NC grinders do not have the ability to process crowns, which brings difficulties to crown processing and is also a difficulty faced by the industry. When the non-NC internal grinding machine is dressing the grinding wheel, since the dressing track AB is parallel to the center line of the grinding wheel (see figure 1 ), the contour of the grinding wheel is a straight line after dressing, so it is impossible to grind the crown of the outer ring racew...

AI Technical Summary

Problems solved by technology

With the emergence of CNC crown grinding machines, crown processing technology has been fully popularized in the industry. However, non-NC grinders have no crown processing capabilities, which brings difficulties to crown processing and is also a difficulty faced by the industry.

When the non-NC internal grinding machine is dressing the grinding wheel, since the dressing track AB is parallel to the center line of the grinding wheel (see Figure 1), the contour of the grinding wheel is a straight line after dressing, so it is impossible to grind the crown of the outer ring raceway

In addition, due to the influence of machine tool precision, the raceway surface of the outer ring after processing will not be convex but concave, which is absolutely not allowed in the processing of bearing rings

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