2022 October the Fourth Week VISTA Technical Knowledge: Grinding of Raceway of Thrust Self aligning Roller Bearing

Hot tags: spherical roller bearing(7)

The race raceway and shaft ring rib of the thrust self-aligning roller bearing produced by our factory are ground by the generation method, and the shaft ring raceway is ground by the cut in method. The product quality meets the process requirements and the design requirements of the product drawings, and has been recognized by Canadian users. The bearing structure is shown in Figure 1.


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Fig. 1 Bearing Structure

 

1.Grinding Method of Race Raceway and Shaft Ring Flange

When the generative grinding method is used, the raceway surface is formed by the contact grinding between the end face of the grinding wheel and the raceway surface. The principle is that if any plane intersects a spherical surface, the path of the intersection must be a small circle or a circle equal to the diameter of the spherical surface. Combined with bearing processing, a rotating circle on the end face of a circumferential grinding wheel can always coincide with an arbitrary spherical surface with a radius equal to or greater than the circumference radius from all aspects. Similarly, if a circle is moved in a certain way, a sphere will be obtained. Based on this principle, the grinding wheel axis and the workpiece axis intersect at two points (imaginary spherical center) on the same two horizontal planes when machining the seat ring raceway and the shaft ring rib. The end face of the grinding wheel fits with the machined surface and rolls relative to each other, thus finishing the grinding of the inner spherical surface of the race raceway, as shown in Figure 2.

 

When grinding, the intersection angle between the grinding wheel axis and the workpiece axis is generally 30. about. During the grinding process, the end face of the grinding wheel needs to be trimmed. When selecting the characteristics of the grinding wheel, the resin bonded grinding wheel with good self sharpening must be required. The grinding wheel is generally bowl shaped, and the end face diameter is smaller than the radius of curvature R3 of the race raceway. When grinding the flange, select the end diameter less than the radius of curvature of the shaft ring flange. The ferrule rotates. In addition to high-speed rotation, the grinding wheel also moves transversely along the axis line of the grinding wheel until the spherical surface is ground to the predetermined size.

 

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Fig. 2 Grinding principle of generating grinding method

 

2.Grinding method of raceway of shaft ring

The cut in grinding method is adopted for the grinding of the shaft ring raceway, and its principle is shown in Figure 3. The profiling plate and self-made wheel dresser with four degrees of freedom are used to shape the wheel. The four degrees of freedom of the grinding wheel dresser are the movement along the x, y, z axis and the rotation around the axis y. The degree of freedom of the profiling plate is the rotation around the z axis.

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Fig. 3 Cutting grinding principle

 

The radius of curvature of the surface of the grinding wheel trimmed in this way is the radius R1 of the raceway of the shaft ring. Adjust the relative positions of the workpiece shaft and the grinding wheel shaft. The ferrule rotates. The grinding wheel rotates at a high speed and feeds longitudinally until the spherical surface is ground to the predetermined size.

 

More about VISTA Spherical Roller Bearing:

Spherical roller bearings have good self-aligning ability and can perform during the shaft deflection under load or the shaft misalignment in mounting. This type of bearings has heavy load carrying capacity and anti-impact ability. In addition to radial loads, they can also carry axial loads in two directions. As a spherical roller bearing manufacturer, Vista mainly offers the following series for customers: 22200 series spherical roller bearing22300 series spherical roller bearing21300 series spherical roller bearing,  23000 series spherical roller bearing,  23100 series spherical roller bearing,  23200 series spherical roller bearing23900 series spherical roller bearing,  24000 series spherical roller bearing,  24100 series spherical roller bearing. The type with lubricating oil hole in the inner ring can also be supplied.

 

Spherical Roller Bearing 


2022-10-21

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