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Home>Bearing knowledge>Talk about several tips for improving the rigidity of imported bearings
Talking about several tips for improving the rigidity of imported bearings
We all know that the rigidity of the imported bearings is very important to the imported bearings themselves; that many users can't know how to improve the rigidity of the original imported bearings and even feel that the rigidity of the imported bearings is impossible to improve; this concept is faulty. Today we will talk about several ways to improve the rigidity of the bearing.
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There are usually three ways to improve the rigidity of imported bearings; the first is to select high-rigidity imported bearings; for example, the high-rigidity bearings in SKF bearings, etc., which can be used for mutual use, should the bearing of the å•¥ attitude be attributed to high-rigidity bearings? Let's summarize a few points:
1 Roller bearings are stiffer than ball bearings,
2 large-size bearings; their rigidity is higher than that of small-sized bearings; even if the diameter is the same; and the larger-width bearing; its rigidity is higher than the width,
3 Rolling machine with multiple number of bearings and a large number of bearings; its rigidity is good,
4 Adjustable clearance bearing; good for supporting support rigidity
5 If necessary, use bearings without inner ring, without outer ring or without inner and outer rings; then reduce deformation and add roll number.
Therefore, we can follow these methods to select some bearings that are relatively high-rigidity. Secondly, we can use the imported bearing application technology to improve the support rigidity.
Ultimately, it is the most important to properly adjust the host layout parameters; to improve the support rigidity.
So how do we adjust the host layout parameters? Let's take a few points to clarify that we take NSK bearings as an example:
1. For the NSK bearing, the required shaft and the bearing device on the seat hole; the lower the surface roughness; the better the shape and bearing accuracy; the higher the support rigidity is.
For the above-mentioned external appearance, the surface is strengthened and treated; it is advantageous to improve the rigidity. The high-hardness plug with low roughness is used; the punch is repeatedly pressed in and out of the seat hole under a smooth condition with a certain interference; it is also beneficial to improve the support rigidity. If necessary, the collar can be similarly treated with a snap ring.
2, NSK imported bearing equipment NSK bearing equipment has a great impact on bearing rigidity; generally speaking; about the centripetal thrust type ball bearing and roller bearing; in the paired application should adopt the outer ring large end face relative (ie The pressure line formed by the pressure taper is outward; the ability of the bearing to resist the overturning moment is large; the pre-tightening amount adjusted during the temperature change is less changed.
3. The multi-Japan NSK bearing support method is selected under the condition of axial orientation; two or more bearings are used as radial support for each pivot point; the support rigidity can be improved. For example, it is in the spindle part of the machine tool; 3. The axial preloading device is selected; several sets of radial thrust bearings are used as the shaft support of the same fulcrum.
4, the use of bearing pre-tightening method to improve the support rigidity of the ball bearing or tapered roller bearing can adopt the axial pre-tightening method; and for the short cylindrical roller bearing, etc. can adopt the radial pre-tightening method; can significantly improve the rigidity of the shaft support; At this moment, the bearing clearance may be eliminated; perhaps a small negative clearance is obtained. However, the speed is not too high; the temperature rise is not large; the best should be adjusted to a small negative clearance condition.
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