The use of linear shaft is becoming more and more popular, but with more and more applications, some problems with linear shaft will inevitably appear. Some people say that the linear shaft will overheat during use. Circumstances, this situation will not only affect the service life of the linear shaft, but also reduce the toughness of the parts and reduce the impact resistance. How can we better solve this situation? We must first understand the overheating of the linear shaft the reason!
We need to judge whether the linear shaft is overheated. You can observe whether the microstructure of the linear shaft after quenching is overheated from the roughness of the bearing part. However, if you want to make an exact judgment, you still need to observe the microstructure. If thick acicular martensite appears in the quenched structure of GCr15 steel, it is a quenched superheated structure.
The formation of the overheating phenomenon of the linear shaft may be caused by the quenching heating temperature being too high or the heating and holding time too long; it may also be that the original structure band-like carbides are serious, causing the low-carbon zone between the two bands to form local martensite needle-like coarse Local overheating caused by.
In order to ensure the sealing performance, the usual method is to attach a sealing device to the supporting position of the linear shaft. This can indeed prevent foreign objects from intruding, but this additional sealing device also occupies a part of the space and increases the axial size of the linear shaft. Bring inconvenience to use, installation and maintenance.
There is another shortcoming of the method of adding a sealing device to the support of the linear shaft, that is, the sealing performance is also affected by the machining accuracy and positioning tolerance of the shaft diameter and the matching part of the housing. Therefore, the traditional sealing method of the linear shaft is imperative. For the use of linear shaft, there are still many advantages, but when purchasing and using, we must pay attention to the quality of linear shaft. High-quality linear shaft has advantages in all aspects of performance and is durable. Okay, that's it for today's sharing. For inquiries about linear optical axes, please email us!