As is well known, ball screws have been widely used in actual production. However, jamming often occurs during the assembly of ball screws.
Once a ball screw is jammed, it cannot continue to be used, which causes great trouble for the assembly of ball screws.
Jamming can also occur during the use of ball screw pairs, leading to abnormal equipment operation.
In this regard, ball screw manufacturers believe that the cause of jamming is the lack of precision in manufacturing parts, but they cannot provide a reasonable explanation for the jamming mechanism.
Although research on ball screws is quite extensive at present, there are very few research papers on the jamming problem of ball screws.
Therefore, it is very necessary to analyze the causes of jamming in screw pairs today.
In actual production, jamming occurs in various types of ball screw pairs, and the failure rate can be controlled within 3%.
The jamming of ball screw pairs is related to poor flexibility and smooth operation caused by poor assembly quality, resulting in the inability of the screw to rotate relative to the nut after jamming.
At this time, assemblers often use methods such as tapping and vibration to loosen the jammed screw pair, but most of these methods are ineffective.
Through actual investigations of the jamming states of ball screw pairs with different types and geometric parameters, some characteristics of ball screw pair jamming have been found:
1.The occurrence of jamming is almost independent of the screw's lead angle and lead size.
2.Ball screw pairs with higher manufacturing precision have a lower probability of jamming.
3.Preloaded ball screw pairs are more prone to jamming.
4.Single-arc raceway screw pairs are more prone to jamming than double-arc raceway screw pairs.
5.Jamming occurs in all reverse types of ball screw pairs.
It should be emphasized that the jammed ball screw pair cannot move forward or backward.
Regardless of whether the screw or the nut is the driving part, and no matter how large the driving torque is, relative movement between the screw and the nut cannot be generated.
Since ball screw pairs have a very high transmission efficiency, generally above 90%, in principle, ball screws should not jam.
Therefore, the jamming phenomenon of ball screw pairs must be analyzed from the aspects of manufacturing errors of their components and assembly conditions.
In addition, considering the actual situation that the jammed ball screw pair cannot be loosened even after increasing the driving torque and cannot be released in both forward and reverse movements, the causes of jamming can only be two situations: mechanical jamming or self-locking.
If you're experiencing issues with ball screw jamming, don't let it disrupt your production line.
Reach out today for expert guidance on preventing jamming and ensuring smooth, efficient operation of your ball screw pairs.
Our team at DLY specializes in high-precision manufacturing and assembly solutions tailored to your needs.
Contact us now to discuss how we can help optimize your ball screw performance!
